git.oblomov.eu Git - git/blob - http-push.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "pack.h"
   4 #include "tag.h"
   5 #include "blob.h"
   6 #include "http.h"
   7 #include "refs.h"
   8 #include "diff.h"
   9 #include "revision.h"
  10 #include "exec_cmd.h"
  11 #include "remote.h"
  12 #include "list-objects.h"
  13 #include "sigchain.h"
  14
  15 #include <expat.h>
  16
  17 static const char http_push_usage[] =
  18 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
  19
  20 #ifndef XML_STATUS_OK
  21 enum XML_Status {
  22   XML_STATUS_OK = 1,
  23   XML_STATUS_ERROR = 0
  24 };
  25 #define XML_STATUS_OK    1
  26 #define XML_STATUS_ERROR 0
  27 #endif
  28
  29 #define PREV_BUF_SIZE 4096
  30 #define RANGE_HEADER_SIZE 30
  31
  32 /* DAV methods */
  33 #define DAV_LOCK "LOCK"
  34 #define DAV_MKCOL "MKCOL"
  35 #define DAV_MOVE "MOVE"
  36 #define DAV_PROPFIND "PROPFIND"
  37 #define DAV_PUT "PUT"
  38 #define DAV_UNLOCK "UNLOCK"
  39 #define DAV_DELETE "DELETE"
  40
  41 /* DAV lock flags */
  42 #define DAV_PROP_LOCKWR (1u << 0)
  43 #define DAV_PROP_LOCKEX (1u << 1)
  44 #define DAV_LOCK_OK (1u << 2)
  45
  46 /* DAV XML properties */
  47 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
  48 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
  49 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
  50 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
  51 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
  52 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
  53 #define DAV_PROPFIND_RESP ".multistatus.response"
  54 #define DAV_PROPFIND_NAME ".multistatus.response.href"
  55 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
  56
  57 /* DAV request body templates */
  58 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
  59 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
  60 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
  61
  62 #define LOCK_TIME 600
  63 #define LOCK_REFRESH 30
  64
  65 /* bits #0-15 in revision.h */
  66
  67 #define LOCAL    (1u<<16)
  68 #define REMOTE   (1u<<17)
  69 #define FETCHING (1u<<18)
  70 #define PUSHING  (1u<<19)
  71
  72 /* We allow "recursive" symbolic refs. Only within reason, though */
  73 #define MAXDEPTH 5
  74
  75 static int pushing;
  76 static int aborted;
  77 static signed char remote_dir_exists[256];
  78
  79 static struct curl_slist *no_pragma_header;
  80
  81 static int push_verbosely;
  82 static int push_all = MATCH_REFS_NONE;
  83 static int force_all;
  84 static int dry_run;
  85
  86 static struct object_list *objects;
  87
  88 struct repo
  89 {
  90         char *url;
  91         char *path;
  92         int path_len;
  93         int has_info_refs;
  94         int can_update_info_refs;
  95         int has_info_packs;
  96         struct packed_git *packs;
  97         struct remote_lock *locks;
  98 };
  99
 100 static struct repo *repo;
 101
 102 enum transfer_state {
 103         NEED_FETCH,
 104         RUN_FETCH_LOOSE,
 105         RUN_FETCH_PACKED,
 106         NEED_PUSH,
 107         RUN_MKCOL,
 108         RUN_PUT,
 109         RUN_MOVE,
 110         ABORTED,
 111         COMPLETE,
 112 };
 113
 114 struct transfer_request
 115 {
 116         struct object *obj;
 117         char *url;
 118         char *dest;
 119         struct remote_lock *lock;
 120         struct curl_slist *headers;
 121         struct buffer buffer;
 122         char filename[PATH_MAX];
 123         char tmpfile[PATH_MAX];
 124         int local_fileno;
 125         FILE *local_stream;
 126         enum transfer_state state;
 127         CURLcode curl_result;
 128         char errorstr[CURL_ERROR_SIZE];
 129         long http_code;
 130         unsigned char real_sha1[20];
 131         git_SHA_CTX c;
 132         z_stream stream;
 133         int zret;
 134         int rename;
 135         void *userData;
 136         struct active_request_slot *slot;
 137         struct transfer_request *next;
 138 };
 139
 140 static struct transfer_request *request_queue_head;
 141
 142 struct xml_ctx
 143 {
 144         char *name;
 145         int len;
 146         char *cdata;
 147         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
 148         void *userData;
 149 };
 150
 151 struct remote_lock
 152 {
 153         char *url;
 154         char *owner;
 155         char *token;
 156         char tmpfile_suffix[41];
 157         time_t start_time;
 158         long timeout;
 159         int refreshing;
 160         struct remote_lock *next;
 161 };
 162
 163 /* Flags that control remote_ls processing */
 164 #define PROCESS_FILES (1u << 0)
 165 #define PROCESS_DIRS  (1u << 1)
 166 #define RECURSIVE     (1u << 2)
 167
 168 /* Flags that remote_ls passes to callback functions */
 169 #define IS_DIR (1u << 0)
 170
 171 struct remote_ls_ctx
 172 {
 173         char *path;
 174         void (*userFunc)(struct remote_ls_ctx *ls);
 175         void *userData;
 176         int flags;
 177         char *dentry_name;
 178         int dentry_flags;
 179         struct remote_ls_ctx *parent;
 180 };
 181
 182 /* get_dav_token_headers options */
 183 enum dav_header_flag {
 184         DAV_HEADER_IF = (1u << 0),
 185         DAV_HEADER_LOCK = (1u << 1),
 186         DAV_HEADER_TIMEOUT = (1u << 2)
 187 };
 188
 189 static char *xml_entities(char *s)
 190 {
 191         struct strbuf buf = STRBUF_INIT;
 192         while (*s) {
 193                 size_t len = strcspn(s, "\"<>&");
 194                 strbuf_add(&buf, s, len);
 195                 s += len;
 196                 switch (*s) {
 197                 case '"':
 198                         strbuf_addstr(&buf, "&quot;");
 199                         break;
 200                 case '<':
 201                         strbuf_addstr(&buf, "&lt;");
 202                         break;
 203                 case '>':
 204                         strbuf_addstr(&buf, "&gt;");
 205                         break;
 206                 case '&':
 207                         strbuf_addstr(&buf, "&amp;");
 208                         break;
 209                 }
 210                 s++;
 211         }
 212         return strbuf_detach(&buf, NULL);
 213 }
 214
 215 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
 216 {
 217         struct strbuf buf = STRBUF_INIT;
 218         struct curl_slist *dav_headers = NULL;
 219
 220         if (options & DAV_HEADER_IF) {
 221                 strbuf_addf(&buf, "If: (<%s>)", lock->token);
 222                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 223                 strbuf_reset(&buf);
 224         }
 225         if (options & DAV_HEADER_LOCK) {
 226                 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
 227                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 228                 strbuf_reset(&buf);
 229         }
 230         if (options & DAV_HEADER_TIMEOUT) {
 231                 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
 232                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 233                 strbuf_reset(&buf);
 234         }
 235         strbuf_release(&buf);
 236
 237         return dav_headers;
 238 }
 239
 240 static void append_remote_object_url(struct strbuf *buf, const char *url,
 241                                      const char *hex,
 242                                      int only_two_digit_prefix)
 243 {
 244         strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
 245         if (!only_two_digit_prefix)
 246                 strbuf_addf(buf, "%s", hex+2);
 247 }
 248
 249 static void finish_request(struct transfer_request *request);
 250 static void release_request(struct transfer_request *request);
 251
 252 static void process_response(void *callback_data)
 253 {
 254         struct transfer_request *request =
 255                 (struct transfer_request *)callback_data;
 256
 257         finish_request(request);
 258 }
 259
 260 #ifdef USE_CURL_MULTI
 261
 262 static char *get_remote_object_url(const char *url, const char *hex,
 263                                    int only_two_digit_prefix)
 264 {
 265         struct strbuf buf = STRBUF_INIT;
 266         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
 267         return strbuf_detach(&buf, NULL);
 268 }
 269
 270 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
 271                                void *data)
 272 {
 273         unsigned char expn[4096];
 274         size_t size = eltsize * nmemb;
 275         int posn = 0;
 276         struct transfer_request *request = (struct transfer_request *)data;
 277         do {
 278                 ssize_t retval = xwrite(request->local_fileno,
 279                                        (char *) ptr + posn, size - posn);
 280                 if (retval < 0)
 281                         return posn;
 282                 posn += retval;
 283         } while (posn < size);
 284
 285         request->stream.avail_in = size;
 286         request->stream.next_in = ptr;
 287         do {
 288                 request->stream.next_out = expn;
 289                 request->stream.avail_out = sizeof(expn);
 290                 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
 291                 git_SHA1_Update(&request->c, expn,
 292                             sizeof(expn) - request->stream.avail_out);
 293         } while (request->stream.avail_in && request->zret == Z_OK);
 294         data_received++;
 295         return size;
 296 }
 297
 298 static void start_fetch_loose(struct transfer_request *request)
 299 {
 300         char *hex = sha1_to_hex(request->obj->sha1);
 301         char *filename;
 302         char prevfile[PATH_MAX];
 303         char *url;
 304         int prevlocal;
 305         unsigned char prev_buf[PREV_BUF_SIZE];
 306         ssize_t prev_read = 0;
 307         long prev_posn = 0;
 308         char range[RANGE_HEADER_SIZE];
 309         struct curl_slist *range_header = NULL;
 310         struct active_request_slot *slot;
 311
 312         filename = sha1_file_name(request->obj->sha1);
 313         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 314         snprintf(request->tmpfile, sizeof(request->tmpfile),
 315                  "%s.temp", filename);
 316
 317         snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
 318         unlink(prevfile);
 319         rename(request->tmpfile, prevfile);
 320         unlink(request->tmpfile);
 321
 322         if (request->local_fileno != -1)
 323                 error("fd leakage in start: %d", request->local_fileno);
 324         request->local_fileno = open(request->tmpfile,
 325                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
 326         /* This could have failed due to the "lazy directory creation";
 327          * try to mkdir the last path component.
 328          */
 329         if (request->local_fileno < 0 && errno == ENOENT) {
 330                 char *dir = strrchr(request->tmpfile, '/');
 331                 if (dir) {
 332                         *dir = 0;
 333                         mkdir(request->tmpfile, 0777);
 334                         *dir = '/';
 335                 }
 336                 request->local_fileno = open(request->tmpfile,
 337                                              O_WRONLY | O_CREAT | O_EXCL, 0666);
 338         }
 339
 340         if (request->local_fileno < 0) {
 341                 request->state = ABORTED;
 342                 error("Couldn't create temporary file %s for %s: %s",
 343                       request->tmpfile, request->filename, strerror(errno));
 344                 return;
 345         }
 346
 347         memset(&request->stream, 0, sizeof(request->stream));
 348
 349         git_inflate_init(&request->stream);
 350
 351         git_SHA1_Init(&request->c);
 352
 353         url = get_remote_object_url(repo->url, hex, 0);
 354         request->url = xstrdup(url);
 355
 356         /* If a previous temp file is present, process what was already
 357            fetched. */
 358         prevlocal = open(prevfile, O_RDONLY);
 359         if (prevlocal != -1) {
 360                 do {
 361                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
 362                         if (prev_read>0) {
 363                                 if (fwrite_sha1_file(prev_buf,
 364                                                      1,
 365                                                      prev_read,
 366                                                      request) == prev_read) {
 367                                         prev_posn += prev_read;
 368                                 } else {
 369                                         prev_read = -1;
 370                                 }
 371                         }
 372                 } while (prev_read > 0);
 373                 close(prevlocal);
 374         }
 375         unlink(prevfile);
 376
 377         /* Reset inflate/SHA1 if there was an error reading the previous temp
 378            file; also rewind to the beginning of the local file. */
 379         if (prev_read == -1) {
 380                 memset(&request->stream, 0, sizeof(request->stream));
 381                 git_inflate_init(&request->stream);
 382                 git_SHA1_Init(&request->c);
 383                 if (prev_posn>0) {
 384                         prev_posn = 0;
 385                         lseek(request->local_fileno, 0, SEEK_SET);
 386                         ftruncate(request->local_fileno, 0);
 387                 }
 388         }
 389
 390         slot = get_active_slot();
 391         slot->callback_func = process_response;
 392         slot->callback_data = request;
 393         request->slot = slot;
 394
 395         curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
 396         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 397         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 398         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 399         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 400
 401         /* If we have successfully processed data from a previous fetch
 402            attempt, only fetch the data we don't already have. */
 403         if (prev_posn>0) {
 404                 if (push_verbosely)
 405                         fprintf(stderr,
 406                                 "Resuming fetch of object %s at byte %ld\n",
 407                                 hex, prev_posn);
 408                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 409                 range_header = curl_slist_append(range_header, range);
 410                 curl_easy_setopt(slot->curl,
 411                                  CURLOPT_HTTPHEADER, range_header);
 412         }
 413
 414         /* Try to get the request started, abort the request on error */
 415         request->state = RUN_FETCH_LOOSE;
 416         if (!start_active_slot(slot)) {
 417                 fprintf(stderr, "Unable to start GET request\n");
 418                 repo->can_update_info_refs = 0;
 419                 release_request(request);
 420         }
 421 }
 422
 423 static void start_mkcol(struct transfer_request *request)
 424 {
 425         char *hex = sha1_to_hex(request->obj->sha1);
 426         struct active_request_slot *slot;
 427
 428         request->url = get_remote_object_url(repo->url, hex, 1);
 429
 430         slot = get_active_slot();
 431         slot->callback_func = process_response;
 432         slot->callback_data = request;
 433         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 434         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 435         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 436         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
 437         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 438
 439         if (start_active_slot(slot)) {
 440                 request->slot = slot;
 441                 request->state = RUN_MKCOL;
 442         } else {
 443                 request->state = ABORTED;
 444                 free(request->url);
 445                 request->url = NULL;
 446         }
 447 }
 448 #endif
 449
 450 static void start_fetch_packed(struct transfer_request *request)
 451 {
 452         char *url;
 453         struct packed_git *target;
 454         FILE *packfile;
 455         char *filename;
 456         long prev_posn = 0;
 457         char range[RANGE_HEADER_SIZE];
 458         struct curl_slist *range_header = NULL;
 459
 460         struct transfer_request *check_request = request_queue_head;
 461         struct active_request_slot *slot;
 462
 463         target = find_sha1_pack(request->obj->sha1, repo->packs);
 464         if (!target) {
 465                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
 466                 repo->can_update_info_refs = 0;
 467                 release_request(request);
 468                 return;
 469         }
 470
 471         fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
 472         fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
 473
 474         filename = sha1_pack_name(target->sha1);
 475         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 476         snprintf(request->tmpfile, sizeof(request->tmpfile),
 477                  "%s.temp", filename);
 478
 479         url = xmalloc(strlen(repo->url) + 64);
 480         sprintf(url, "%sobjects/pack/pack-%s.pack",
 481                 repo->url, sha1_to_hex(target->sha1));
 482
 483         /* Make sure there isn't another open request for this pack */
 484         while (check_request) {
 485                 if (check_request->state == RUN_FETCH_PACKED &&
 486                     !strcmp(check_request->url, url)) {
 487                         free(url);
 488                         release_request(request);
 489                         return;
 490                 }
 491                 check_request = check_request->next;
 492         }
 493
 494         packfile = fopen(request->tmpfile, "a");
 495         if (!packfile) {
 496                 fprintf(stderr, "Unable to open local file %s for pack",
 497                         request->tmpfile);
 498                 repo->can_update_info_refs = 0;
 499                 free(url);
 500                 return;
 501         }
 502
 503         slot = get_active_slot();
 504         slot->callback_func = process_response;
 505         slot->callback_data = request;
 506         request->slot = slot;
 507         request->local_stream = packfile;
 508         request->userData = target;
 509
 510         request->url = url;
 511         curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
 512         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
 513         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 514         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 515         slot->local = packfile;
 516
 517         /* If there is data present from a previous transfer attempt,
 518            resume where it left off */
 519         prev_posn = ftell(packfile);
 520         if (prev_posn>0) {
 521                 if (push_verbosely)
 522                         fprintf(stderr,
 523                                 "Resuming fetch of pack %s at byte %ld\n",
 524                                 sha1_to_hex(target->sha1), prev_posn);
 525                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 526                 range_header = curl_slist_append(range_header, range);
 527                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
 528         }
 529
 530         /* Try to get the request started, abort the request on error */
 531         request->state = RUN_FETCH_PACKED;
 532         if (!start_active_slot(slot)) {
 533                 fprintf(stderr, "Unable to start GET request\n");
 534                 repo->can_update_info_refs = 0;
 535                 release_request(request);
 536         }
 537 }
 538
 539 static void start_put(struct transfer_request *request)
 540 {
 541         char *hex = sha1_to_hex(request->obj->sha1);
 542         struct active_request_slot *slot;
 543         struct strbuf buf = STRBUF_INIT;
 544         enum object_type type;
 545         char hdr[50];
 546         void *unpacked;
 547         unsigned long len;
 548         int hdrlen;
 549         ssize_t size;
 550         z_stream stream;
 551
 552         unpacked = read_sha1_file(request->obj->sha1, &type, &len);
 553         hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
 554
 555         /* Set it up */
 556         memset(&stream, 0, sizeof(stream));
 557         deflateInit(&stream, zlib_compression_level);
 558         size = deflateBound(&stream, len + hdrlen);
 559         strbuf_init(&request->buffer.buf, size);
 560         request->buffer.posn = 0;
 561
 562         /* Compress it */
 563         stream.next_out = (unsigned char *)request->buffer.buf.buf;
 564         stream.avail_out = size;
 565
 566         /* First header.. */
 567         stream.next_in = (void *)hdr;
 568         stream.avail_in = hdrlen;
 569         while (deflate(&stream, 0) == Z_OK)
 570                 /* nothing */;
 571
 572         /* Then the data itself.. */
 573         stream.next_in = unpacked;
 574         stream.avail_in = len;
 575         while (deflate(&stream, Z_FINISH) == Z_OK)
 576                 /* nothing */;
 577         deflateEnd(&stream);
 578         free(unpacked);
 579
 580         request->buffer.buf.len = stream.total_out;
 581
 582         strbuf_addstr(&buf, "Destination: ");
 583         append_remote_object_url(&buf, repo->url, hex, 0);
 584         request->dest = strbuf_detach(&buf, NULL);
 585
 586         append_remote_object_url(&buf, repo->url, hex, 0);
 587         strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
 588         request->url = strbuf_detach(&buf, NULL);
 589
 590         slot = get_active_slot();
 591         slot->callback_func = process_response;
 592         slot->callback_data = request;
 593         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
 594         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
 595         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
 596 #ifndef NO_CURL_IOCTL
 597         curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
 598         curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
 599 #endif
 600         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 601         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
 602         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
 603         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
 604         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 605         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 606
 607         if (start_active_slot(slot)) {
 608                 request->slot = slot;
 609                 request->state = RUN_PUT;
 610         } else {
 611                 request->state = ABORTED;
 612                 free(request->url);
 613                 request->url = NULL;
 614         }
 615 }
 616
 617 static void start_move(struct transfer_request *request)
 618 {
 619         struct active_request_slot *slot;
 620         struct curl_slist *dav_headers = NULL;
 621
 622         slot = get_active_slot();
 623         slot->callback_func = process_response;
 624         slot->callback_data = request;
 625         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 626         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
 627         dav_headers = curl_slist_append(dav_headers, request->dest);
 628         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
 629         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 630         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 631         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 632
 633         if (start_active_slot(slot)) {
 634                 request->slot = slot;
 635                 request->state = RUN_MOVE;
 636         } else {
 637                 request->state = ABORTED;
 638                 free(request->url);
 639                 request->url = NULL;
 640         }
 641 }
 642
 643 static int refresh_lock(struct remote_lock *lock)
 644 {
 645         struct active_request_slot *slot;
 646         struct slot_results results;
 647         struct curl_slist *dav_headers;
 648         int rc = 0;
 649
 650         lock->refreshing = 1;
 651
 652         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
 653
 654         slot = get_active_slot();
 655         slot->results = &results;
 656         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 657         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 658         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
 659         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
 660         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 661
 662         if (start_active_slot(slot)) {
 663                 run_active_slot(slot);
 664                 if (results.curl_result != CURLE_OK) {
 665                         fprintf(stderr, "LOCK HTTP error %ld\n",
 666                                 results.http_code);
 667                 } else {
 668                         lock->start_time = time(NULL);
 669                         rc = 1;
 670                 }
 671         }
 672
 673         lock->refreshing = 0;
 674         curl_slist_free_all(dav_headers);
 675
 676         return rc;
 677 }
 678
 679 static void check_locks(void)
 680 {
 681         struct remote_lock *lock = repo->locks;
 682         time_t current_time = time(NULL);
 683         int time_remaining;
 684
 685         while (lock) {
 686                 time_remaining = lock->start_time + lock->timeout -
 687                         current_time;
 688                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
 689                         if (!refresh_lock(lock)) {
 690                                 fprintf(stderr,
 691                                         "Unable to refresh lock for %s\n",
 692                                         lock->url);
 693                                 aborted = 1;
 694                                 return;
 695                         }
 696                 }
 697                 lock = lock->next;
 698         }
 699 }
 700
 701 static void release_request(struct transfer_request *request)
 702 {
 703         struct transfer_request *entry = request_queue_head;
 704
 705         if (request == request_queue_head) {
 706                 request_queue_head = request->next;
 707         } else {
 708                 while (entry->next != NULL && entry->next != request)
 709                         entry = entry->next;
 710                 if (entry->next == request)
 711                         entry->next = entry->next->next;
 712         }
 713
 714         if (request->local_fileno != -1)
 715                 close(request->local_fileno);
 716         if (request->local_stream)
 717                 fclose(request->local_stream);
 718         free(request->url);
 719         free(request);
 720 }
 721
 722 static void finish_request(struct transfer_request *request)
 723 {
 724         struct stat st;
 725         struct packed_git *target;
 726         struct packed_git **lst;
 727
 728         request->curl_result = request->slot->curl_result;
 729         request->http_code = request->slot->http_code;
 730         request->slot = NULL;
 731
 732         /* Keep locks active */
 733         check_locks();
 734
 735         if (request->headers != NULL)
 736                 curl_slist_free_all(request->headers);
 737
 738         /* URL is reused for MOVE after PUT */
 739         if (request->state != RUN_PUT) {
 740                 free(request->url);
 741                 request->url = NULL;
 742         }
 743
 744         if (request->state == RUN_MKCOL) {
 745                 if (request->curl_result == CURLE_OK ||
 746                     request->http_code == 405) {
 747                         remote_dir_exists[request->obj->sha1[0]] = 1;
 748                         start_put(request);
 749                 } else {
 750                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
 751                                 sha1_to_hex(request->obj->sha1),
 752                                 request->curl_result, request->http_code);
 753                         request->state = ABORTED;
 754                         aborted = 1;
 755                 }
 756         } else if (request->state == RUN_PUT) {
 757                 if (request->curl_result == CURLE_OK) {
 758                         start_move(request);
 759                 } else {
 760                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
 761                                 sha1_to_hex(request->obj->sha1),
 762                                 request->curl_result, request->http_code);
 763                         request->state = ABORTED;
 764                         aborted = 1;
 765                 }
 766         } else if (request->state == RUN_MOVE) {
 767                 if (request->curl_result == CURLE_OK) {
 768                         if (push_verbosely)
 769                                 fprintf(stderr, "    sent %s\n",
 770                                         sha1_to_hex(request->obj->sha1));
 771                         request->obj->flags |= REMOTE;
 772                         release_request(request);
 773                 } else {
 774                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
 775                                 sha1_to_hex(request->obj->sha1),
 776                                 request->curl_result, request->http_code);
 777                         request->state = ABORTED;
 778                         aborted = 1;
 779                 }
 780         } else if (request->state == RUN_FETCH_LOOSE) {
 781                 close(request->local_fileno); request->local_fileno = -1;
 782
 783                 if (request->curl_result != CURLE_OK &&
 784                     request->http_code != 416) {
 785                         if (stat(request->tmpfile, &st) == 0) {
 786                                 if (st.st_size == 0)
 787                                         unlink(request->tmpfile);
 788                         }
 789                 } else {
 790                         if (request->http_code == 416)
 791                                 warning("requested range invalid; we may already have all the data.");
 792
 793                         git_inflate_end(&request->stream);
 794                         git_SHA1_Final(request->real_sha1, &request->c);
 795                         if (request->zret != Z_STREAM_END) {
 796                                 unlink(request->tmpfile);
 797                         } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
 798                                 unlink(request->tmpfile);
 799                         } else {
 800                                 request->rename =
 801                                         move_temp_to_file(
 802                                                 request->tmpfile,
 803                                                 request->filename);
 804                                 if (request->rename == 0) {
 805                                         request->obj->flags |= (LOCAL | REMOTE);
 806                                 }
 807                         }
 808                 }
 809
 810                 /* Try fetching packed if necessary */
 811                 if (request->obj->flags & LOCAL)
 812                         release_request(request);
 813                 else
 814                         start_fetch_packed(request);
 815
 816         } else if (request->state == RUN_FETCH_PACKED) {
 817                 if (request->curl_result != CURLE_OK) {
 818                         fprintf(stderr, "Unable to get pack file %s\n%s",
 819                                 request->url, curl_errorstr);
 820                         repo->can_update_info_refs = 0;
 821                 } else {
 822                         off_t pack_size = ftell(request->local_stream);
 823
 824                         fclose(request->local_stream);
 825                         request->local_stream = NULL;
 826                         if (!move_temp_to_file(request->tmpfile,
 827                                                request->filename)) {
 828                                 target = (struct packed_git *)request->userData;
 829                                 target->pack_size = pack_size;
 830                                 lst = &repo->packs;
 831                                 while (*lst != target)
 832                                         lst = &((*lst)->next);
 833                                 *lst = (*lst)->next;
 834
 835                                 if (!verify_pack(target))
 836                                         install_packed_git(target);
 837                                 else
 838                                         repo->can_update_info_refs = 0;
 839                         }
 840                 }
 841                 release_request(request);
 842         }
 843 }
 844
 845 #ifdef USE_CURL_MULTI
 846 static int fill_active_slot(void *unused)
 847 {
 848         struct transfer_request *request;
 849
 850         if (aborted)
 851                 return 0;
 852
 853         for (request = request_queue_head; request; request = request->next) {
 854                 if (request->state == NEED_FETCH) {
 855                         start_fetch_loose(request);
 856                         return 1;
 857                 } else if (pushing && request->state == NEED_PUSH) {
 858                         if (remote_dir_exists[request->obj->sha1[0]] == 1) {
 859                                 start_put(request);
 860                         } else {
 861                                 start_mkcol(request);
 862                         }
 863                         return 1;
 864                 }
 865         }
 866         return 0;
 867 }
 868 #endif
 869
 870 static void get_remote_object_list(unsigned char parent);
 871
 872 static void add_fetch_request(struct object *obj)
 873 {
 874         struct transfer_request *request;
 875
 876         check_locks();
 877
 878         /*
 879          * Don't fetch the object if it's known to exist locally
 880          * or is already in the request queue
 881          */
 882         if (remote_dir_exists[obj->sha1[0]] == -1)
 883                 get_remote_object_list(obj->sha1[0]);
 884         if (obj->flags & (LOCAL | FETCHING))
 885                 return;
 886
 887         obj->flags |= FETCHING;
 888         request = xmalloc(sizeof(*request));
 889         request->obj = obj;
 890         request->url = NULL;
 891         request->lock = NULL;
 892         request->headers = NULL;
 893         request->local_fileno = -1;
 894         request->local_stream = NULL;
 895         request->state = NEED_FETCH;
 896         request->next = request_queue_head;
 897         request_queue_head = request;
 898
 899 #ifdef USE_CURL_MULTI
 900         fill_active_slots();
 901         step_active_slots();
 902 #endif
 903 }
 904
 905 static int add_send_request(struct object *obj, struct remote_lock *lock)
 906 {
 907         struct transfer_request *request = request_queue_head;
 908         struct packed_git *target;
 909
 910         /* Keep locks active */
 911         check_locks();
 912
 913         /*
 914          * Don't push the object if it's known to exist on the remote
 915          * or is already in the request queue
 916          */
 917         if (remote_dir_exists[obj->sha1[0]] == -1)
 918                 get_remote_object_list(obj->sha1[0]);
 919         if (obj->flags & (REMOTE | PUSHING))
 920                 return 0;
 921         target = find_sha1_pack(obj->sha1, repo->packs);
 922         if (target) {
 923                 obj->flags |= REMOTE;
 924                 return 0;
 925         }
 926
 927         obj->flags |= PUSHING;
 928         request = xmalloc(sizeof(*request));
 929         request->obj = obj;
 930         request->url = NULL;
 931         request->lock = lock;
 932         request->headers = NULL;
 933         request->local_fileno = -1;
 934         request->local_stream = NULL;
 935         request->state = NEED_PUSH;
 936         request->next = request_queue_head;
 937         request_queue_head = request;
 938
 939 #ifdef USE_CURL_MULTI
 940         fill_active_slots();
 941         step_active_slots();
 942 #endif
 943
 944         return 1;
 945 }
 946
 947 static int fetch_index(unsigned char *sha1)
 948 {
 949         char *hex = sha1_to_hex(sha1);
 950         char *filename;
 951         char *url;
 952         char tmpfile[PATH_MAX];
 953         long prev_posn = 0;
 954         char range[RANGE_HEADER_SIZE];
 955         struct curl_slist *range_header = NULL;
 956
 957         FILE *indexfile;
 958         struct active_request_slot *slot;
 959         struct slot_results results;
 960
 961         /* Don't use the index if the pack isn't there */
 962         url = xmalloc(strlen(repo->url) + 64);
 963         sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
 964         slot = get_active_slot();
 965         slot->results = &results;
 966         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 967         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 968         if (start_active_slot(slot)) {
 969                 run_active_slot(slot);
 970                 if (results.curl_result != CURLE_OK) {
 971                         free(url);
 972                         return error("Unable to verify pack %s is available",
 973                                      hex);
 974                 }
 975         } else {
 976                 free(url);
 977                 return error("Unable to start request");
 978         }
 979
 980         if (has_pack_index(sha1)) {
 981                 free(url);
 982                 return 0;
 983         }
 984
 985         if (push_verbosely)
 986                 fprintf(stderr, "Getting index for pack %s\n", hex);
 987
 988         sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
 989
 990         filename = sha1_pack_index_name(sha1);
 991         snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
 992         indexfile = fopen(tmpfile, "a");
 993         if (!indexfile) {
 994                 free(url);
 995                 return error("Unable to open local file %s for pack index",
 996                              tmpfile);
 997         }
 998
 999         slot = get_active_slot();
1000         slot->results = &results;
1001         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1002         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1003         curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
1004         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1005         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1006         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1007         slot->local = indexfile;
1008
1009         /* If there is data present from a previous transfer attempt,
1010            resume where it left off */
1011         prev_posn = ftell(indexfile);
1012         if (prev_posn>0) {
1013                 if (push_verbosely)
1014                         fprintf(stderr,
1015                                 "Resuming fetch of index for pack %s at byte %ld\n",
1016                                 hex, prev_posn);
1017                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1018                 range_header = curl_slist_append(range_header, range);
1019                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
1020         }
1021
1022         if (start_active_slot(slot)) {
1023                 run_active_slot(slot);
1024                 if (results.curl_result != CURLE_OK) {
1025                         free(url);
1026                         fclose(indexfile);
1027                         return error("Unable to get pack index %s\n%s", url,
1028                                      curl_errorstr);
1029                 }
1030         } else {
1031                 free(url);
1032                 fclose(indexfile);
1033                 return error("Unable to start request");
1034         }
1035
1036         free(url);
1037         fclose(indexfile);
1038
1039         return move_temp_to_file(tmpfile, filename);
1040 }
1041
1042 static int setup_index(unsigned char *sha1)
1043 {
1044         struct packed_git *new_pack;
1045
1046         if (fetch_index(sha1))
1047                 return -1;
1048
1049         new_pack = parse_pack_index(sha1);
1050         new_pack->next = repo->packs;
1051         repo->packs = new_pack;
1052         return 0;
1053 }
1054
1055 static int fetch_indices(void)
1056 {
1057         unsigned char sha1[20];
1058         char *url;
1059         struct strbuf buffer = STRBUF_INIT;
1060         char *data;
1061         int i = 0;
1062
1063         struct active_request_slot *slot;
1064         struct slot_results results;
1065
1066         if (push_verbosely)
1067                 fprintf(stderr, "Getting pack list\n");
1068
1069         url = xmalloc(strlen(repo->url) + 20);
1070         sprintf(url, "%sobjects/info/packs", repo->url);
1071
1072         slot = get_active_slot();
1073         slot->results = &results;
1074         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1075         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1076         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1077         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1078         if (start_active_slot(slot)) {
1079                 run_active_slot(slot);
1080                 if (results.curl_result != CURLE_OK) {
1081                         strbuf_release(&buffer);
1082                         free(url);
1083                         if (results.http_code == 404)
1084                                 return 0;
1085                         else
1086                                 return error("%s", curl_errorstr);
1087                 }
1088         } else {
1089                 strbuf_release(&buffer);
1090                 free(url);
1091                 return error("Unable to start request");
1092         }
1093         free(url);
1094
1095         data = buffer.buf;
1096         while (i < buffer.len) {
1097                 switch (data[i]) {
1098                 case 'P':
1099                         i++;
1100                         if (i + 52 < buffer.len &&
1101                             !prefixcmp(data + i, " pack-") &&
1102                             !prefixcmp(data + i + 46, ".pack\n")) {
1103                                 get_sha1_hex(data + i + 6, sha1);
1104                                 setup_index(sha1);
1105                                 i += 51;
1106                                 break;
1107                         }
1108                 default:
1109                         while (data[i] != '\n')
1110                                 i++;
1111                 }
1112                 i++;
1113         }
1114
1115         strbuf_release(&buffer);
1116         return 0;
1117 }
1118
1119 static void one_remote_object(const char *hex)
1120 {
1121         unsigned char sha1[20];
1122         struct object *obj;
1123
1124         if (get_sha1_hex(hex, sha1) != 0)
1125                 return;
1126
1127         obj = lookup_object(sha1);
1128         if (!obj)
1129                 obj = parse_object(sha1);
1130
1131         /* Ignore remote objects that don't exist locally */
1132         if (!obj)
1133                 return;
1134
1135         obj->flags |= REMOTE;
1136         if (!object_list_contains(objects, obj))
1137                 object_list_insert(obj, &objects);
1138 }
1139
1140 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1141 {
1142         int *lock_flags = (int *)ctx->userData;
1143
1144         if (tag_closed) {
1145                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1146                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
1147                             (*lock_flags & DAV_PROP_LOCKWR)) {
1148                                 *lock_flags |= DAV_LOCK_OK;
1149                         }
1150                         *lock_flags &= DAV_LOCK_OK;
1151                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1152                         *lock_flags |= DAV_PROP_LOCKWR;
1153                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1154                         *lock_flags |= DAV_PROP_LOCKEX;
1155                 }
1156         }
1157 }
1158
1159 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1160 {
1161         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1162         git_SHA_CTX sha_ctx;
1163         unsigned char lock_token_sha1[20];
1164
1165         if (tag_closed && ctx->cdata) {
1166                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1167                         lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1168                         strcpy(lock->owner, ctx->cdata);
1169                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1170                         if (!prefixcmp(ctx->cdata, "Second-"))
1171                                 lock->timeout =
1172                                         strtol(ctx->cdata + 7, NULL, 10);
1173                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1174                         lock->token = xmalloc(strlen(ctx->cdata) + 1);
1175                         strcpy(lock->token, ctx->cdata);
1176
1177                         git_SHA1_Init(&sha_ctx);
1178                         git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1179                         git_SHA1_Final(lock_token_sha1, &sha_ctx);
1180
1181                         lock->tmpfile_suffix[0] = '_';
1182                         memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1183                 }
1184         }
1185 }
1186
1187 static void one_remote_ref(char *refname);
1188
1189 static void
1190 xml_start_tag(void *userData, const char *name, const char **atts)
1191 {
1192         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1193         const char *c = strchr(name, ':');
1194         int new_len;
1195
1196         if (c == NULL)
1197                 c = name;
1198         else
1199                 c++;
1200
1201         new_len = strlen(ctx->name) + strlen(c) + 2;
1202
1203         if (new_len > ctx->len) {
1204                 ctx->name = xrealloc(ctx->name, new_len);
1205                 ctx->len = new_len;
1206         }
1207         strcat(ctx->name, ".");
1208         strcat(ctx->name, c);
1209
1210         free(ctx->cdata);
1211         ctx->cdata = NULL;
1212
1213         ctx->userFunc(ctx, 0);
1214 }
1215
1216 static void
1217 xml_end_tag(void *userData, const char *name)
1218 {
1219         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1220         const char *c = strchr(name, ':');
1221         char *ep;
1222
1223         ctx->userFunc(ctx, 1);
1224
1225         if (c == NULL)
1226                 c = name;
1227         else
1228                 c++;
1229
1230         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1231         *ep = 0;
1232 }
1233
1234 static void
1235 xml_cdata(void *userData, const XML_Char *s, int len)
1236 {
1237         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1238         free(ctx->cdata);
1239         ctx->cdata = xmemdupz(s, len);
1240 }
1241
1242 static struct remote_lock *lock_remote(const char *path, long timeout)
1243 {
1244         struct active_request_slot *slot;
1245         struct slot_results results;
1246         struct buffer out_buffer = { STRBUF_INIT, 0 };
1247         struct strbuf in_buffer = STRBUF_INIT;
1248         char *url;
1249         char *ep;
1250         char timeout_header[25];
1251         struct remote_lock *lock = NULL;
1252         struct curl_slist *dav_headers = NULL;
1253         struct xml_ctx ctx;
1254         char *escaped;
1255
1256         url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1257         sprintf(url, "%s%s", repo->url, path);
1258
1259         /* Make sure leading directories exist for the remote ref */
1260         ep = strchr(url + strlen(repo->url) + 1, '/');
1261         while (ep) {
1262                 char saved_character = ep[1];
1263                 ep[1] = '\0';
1264                 slot = get_active_slot();
1265                 slot->results = &results;
1266                 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1267                 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1268                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1269                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1270                 if (start_active_slot(slot)) {
1271                         run_active_slot(slot);
1272                         if (results.curl_result != CURLE_OK &&
1273                             results.http_code != 405) {
1274                                 fprintf(stderr,
1275                                         "Unable to create branch path %s\n",
1276                                         url);
1277                                 free(url);
1278                                 return NULL;
1279                         }
1280                 } else {
1281                         fprintf(stderr, "Unable to start MKCOL request\n");
1282                         free(url);
1283                         return NULL;
1284                 }
1285                 ep[1] = saved_character;
1286                 ep = strchr(ep + 1, '/');
1287         }
1288
1289         escaped = xml_entities(git_default_email);
1290         strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
1291         free(escaped);
1292
1293         sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1294         dav_headers = curl_slist_append(dav_headers, timeout_header);
1295         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1296
1297         slot = get_active_slot();
1298         slot->results = &results;
1299         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1300         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1301         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1302 #ifndef NO_CURL_IOCTL
1303         curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1304         curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1305 #endif
1306         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1307         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1308         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1309         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1310         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1311         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1312
1313         lock = xcalloc(1, sizeof(*lock));
1314         lock->timeout = -1;
1315
1316         if (start_active_slot(slot)) {
1317                 run_active_slot(slot);
1318                 if (results.curl_result == CURLE_OK) {
1319                         XML_Parser parser = XML_ParserCreate(NULL);
1320                         enum XML_Status result;
1321                         ctx.name = xcalloc(10, 1);
1322                         ctx.len = 0;
1323                         ctx.cdata = NULL;
1324                         ctx.userFunc = handle_new_lock_ctx;
1325                         ctx.userData = lock;
1326                         XML_SetUserData(parser, &ctx);
1327                         XML_SetElementHandler(parser, xml_start_tag,
1328                                               xml_end_tag);
1329                         XML_SetCharacterDataHandler(parser, xml_cdata);
1330                         result = XML_Parse(parser, in_buffer.buf,
1331                                            in_buffer.len, 1);
1332                         free(ctx.name);
1333                         if (result != XML_STATUS_OK) {
1334                                 fprintf(stderr, "XML error: %s\n",
1335                                         XML_ErrorString(
1336                                                 XML_GetErrorCode(parser)));
1337                                 lock->timeout = -1;
1338                         }
1339                         XML_ParserFree(parser);
1340                 }
1341         } else {
1342                 fprintf(stderr, "Unable to start LOCK request\n");
1343         }
1344
1345         curl_slist_free_all(dav_headers);
1346         strbuf_release(&out_buffer.buf);
1347         strbuf_release(&in_buffer);
1348
1349         if (lock->token == NULL || lock->timeout <= 0) {
1350                 free(lock->token);
1351                 free(lock->owner);
1352                 free(url);
1353                 free(lock);
1354                 lock = NULL;
1355         } else {
1356                 lock->url = url;
1357                 lock->start_time = time(NULL);
1358                 lock->next = repo->locks;
1359                 repo->locks = lock;
1360         }
1361
1362         return lock;
1363 }
1364
1365 static int unlock_remote(struct remote_lock *lock)
1366 {
1367         struct active_request_slot *slot;
1368         struct slot_results results;
1369         struct remote_lock *prev = repo->locks;
1370         struct curl_slist *dav_headers;
1371         int rc = 0;
1372
1373         dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1374
1375         slot = get_active_slot();
1376         slot->results = &results;
1377         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1378         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1379         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1380         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1381
1382         if (start_active_slot(slot)) {
1383                 run_active_slot(slot);
1384                 if (results.curl_result == CURLE_OK)
1385                         rc = 1;
1386                 else
1387                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
1388                                 results.http_code);
1389         } else {
1390                 fprintf(stderr, "Unable to start UNLOCK request\n");
1391         }
1392
1393         curl_slist_free_all(dav_headers);
1394
1395         if (repo->locks == lock) {
1396                 repo->locks = lock->next;
1397         } else {
1398                 while (prev && prev->next != lock)
1399                         prev = prev->next;
1400                 if (prev)
1401                         prev->next = prev->next->next;
1402         }
1403
1404         free(lock->owner);
1405         free(lock->url);
1406         free(lock->token);
1407         free(lock);
1408
1409         return rc;
1410 }
1411
1412 static void remove_locks(void)
1413 {
1414         struct remote_lock *lock = repo->locks;
1415
1416         fprintf(stderr, "Removing remote locks...\n");
1417         while (lock) {
1418                 unlock_remote(lock);
1419                 lock = lock->next;
1420         }
1421 }
1422
1423 static void remove_locks_on_signal(int signo)
1424 {
1425         remove_locks();
1426         sigchain_pop(signo);
1427         raise(signo);
1428 }
1429
1430 static void remote_ls(const char *path, int flags,
1431                       void (*userFunc)(struct remote_ls_ctx *ls),
1432                       void *userData);
1433
1434 static void process_ls_object(struct remote_ls_ctx *ls)
1435 {
1436         unsigned int *parent = (unsigned int *)ls->userData;
1437         char *path = ls->dentry_name;
1438         char *obj_hex;
1439
1440         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1441                 remote_dir_exists[*parent] = 1;
1442                 return;
1443         }
1444
1445         if (strlen(path) != 49)
1446                 return;
1447         path += 8;
1448         obj_hex = xmalloc(strlen(path));
1449         /* NB: path is not null-terminated, can not use strlcpy here */
1450         memcpy(obj_hex, path, 2);
1451         strcpy(obj_hex + 2, path + 3);
1452         one_remote_object(obj_hex);
1453         free(obj_hex);
1454 }
1455
1456 static void process_ls_ref(struct remote_ls_ctx *ls)
1457 {
1458         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1459                 fprintf(stderr, "  %s\n", ls->dentry_name);
1460                 return;
1461         }
1462
1463         if (!(ls->dentry_flags & IS_DIR))
1464                 one_remote_ref(ls->dentry_name);
1465 }
1466
1467 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1468 {
1469         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1470
1471         if (tag_closed) {
1472                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1473                         if (ls->dentry_flags & IS_DIR) {
1474                                 if (ls->flags & PROCESS_DIRS) {
1475                                         ls->userFunc(ls);
1476                                 }
1477                                 if (strcmp(ls->dentry_name, ls->path) &&
1478                                     ls->flags & RECURSIVE) {
1479                                         remote_ls(ls->dentry_name,
1480                                                   ls->flags,
1481                                                   ls->userFunc,
1482                                                   ls->userData);
1483                                 }
1484                         } else if (ls->flags & PROCESS_FILES) {
1485                                 ls->userFunc(ls);
1486                         }
1487                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1488                         char *path = ctx->cdata;
1489                         if (*ctx->cdata == 'h') {
1490                                 path = strstr(path, "//");
1491                                 if (path) {
1492                                         path = strchr(path+2, '/');
1493                                 }
1494                         }
1495                         if (path) {
1496                                 path += repo->path_len;
1497                                 ls->dentry_name = xstrdup(path);
1498                         }
1499                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1500                         ls->dentry_flags |= IS_DIR;
1501                 }
1502         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1503                 free(ls->dentry_name);
1504                 ls->dentry_name = NULL;
1505                 ls->dentry_flags = 0;
1506         }
1507 }
1508
1509 /*
1510  * NEEDSWORK: remote_ls() ignores info/refs on the remote side.  But it
1511  * should _only_ heed the information from that file, instead of trying to
1512  * determine the refs from the remote file system (badly: it does not even
1513  * know about packed-refs).
1514  */
1515 static void remote_ls(const char *path, int flags,
1516                       void (*userFunc)(struct remote_ls_ctx *ls),
1517                       void *userData)
1518 {
1519         char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1520         struct active_request_slot *slot;
1521         struct slot_results results;
1522         struct strbuf in_buffer = STRBUF_INIT;
1523         struct buffer out_buffer = { STRBUF_INIT, 0 };
1524         struct curl_slist *dav_headers = NULL;
1525         struct xml_ctx ctx;
1526         struct remote_ls_ctx ls;
1527
1528         ls.flags = flags;
1529         ls.path = xstrdup(path);
1530         ls.dentry_name = NULL;
1531         ls.dentry_flags = 0;
1532         ls.userData = userData;
1533         ls.userFunc = userFunc;
1534
1535         sprintf(url, "%s%s", repo->url, path);
1536
1537         strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1538
1539         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1540         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1541
1542         slot = get_active_slot();
1543         slot->results = &results;
1544         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1545         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1546         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1547 #ifndef NO_CURL_IOCTL
1548         curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1549         curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1550 #endif
1551         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1552         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1553         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1554         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1555         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1556         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1557
1558         if (start_active_slot(slot)) {
1559                 run_active_slot(slot);
1560                 if (results.curl_result == CURLE_OK) {
1561                         XML_Parser parser = XML_ParserCreate(NULL);
1562                         enum XML_Status result;
1563                         ctx.name = xcalloc(10, 1);
1564                         ctx.len = 0;
1565                         ctx.cdata = NULL;
1566                         ctx.userFunc = handle_remote_ls_ctx;
1567                         ctx.userData = &ls;
1568                         XML_SetUserData(parser, &ctx);
1569                         XML_SetElementHandler(parser, xml_start_tag,
1570                                               xml_end_tag);
1571                         XML_SetCharacterDataHandler(parser, xml_cdata);
1572                         result = XML_Parse(parser, in_buffer.buf,
1573                                            in_buffer.len, 1);
1574                         free(ctx.name);
1575
1576                         if (result != XML_STATUS_OK) {
1577                                 fprintf(stderr, "XML error: %s\n",
1578                                         XML_ErrorString(
1579                                                 XML_GetErrorCode(parser)));
1580                         }
1581                         XML_ParserFree(parser);
1582                 }
1583         } else {
1584                 fprintf(stderr, "Unable to start PROPFIND request\n");
1585         }
1586
1587         free(ls.path);
1588         free(url);
1589         strbuf_release(&out_buffer.buf);
1590         strbuf_release(&in_buffer);
1591         curl_slist_free_all(dav_headers);
1592 }
1593
1594 static void get_remote_object_list(unsigned char parent)
1595 {
1596         char path[] = "objects/XX/";
1597         static const char hex[] = "0123456789abcdef";
1598         unsigned int val = parent;
1599
1600         path[8] = hex[val >> 4];
1601         path[9] = hex[val & 0xf];
1602         remote_dir_exists[val] = 0;
1603         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1604                   process_ls_object, &val);
1605 }
1606
1607 static int locking_available(void)
1608 {
1609         struct active_request_slot *slot;
1610         struct slot_results results;
1611         struct strbuf in_buffer = STRBUF_INIT;
1612         struct buffer out_buffer = { STRBUF_INIT, 0 };
1613         struct curl_slist *dav_headers = NULL;
1614         struct xml_ctx ctx;
1615         int lock_flags = 0;
1616         char *escaped;
1617
1618         escaped = xml_entities(repo->url);
1619         strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1620         free(escaped);
1621
1622         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1623         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1624
1625         slot = get_active_slot();
1626         slot->results = &results;
1627         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1628         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1629         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1630 #ifndef NO_CURL_IOCTL
1631         curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1632         curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1633 #endif
1634         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1635         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1636         curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1637         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1638         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1639         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1640
1641         if (start_active_slot(slot)) {
1642                 run_active_slot(slot);
1643                 if (results.curl_result == CURLE_OK) {
1644                         XML_Parser parser = XML_ParserCreate(NULL);
1645                         enum XML_Status result;
1646                         ctx.name = xcalloc(10, 1);
1647                         ctx.len = 0;
1648                         ctx.cdata = NULL;
1649                         ctx.userFunc = handle_lockprop_ctx;
1650                         ctx.userData = &lock_flags;
1651                         XML_SetUserData(parser, &ctx);
1652                         XML_SetElementHandler(parser, xml_start_tag,
1653                                               xml_end_tag);
1654                         result = XML_Parse(parser, in_buffer.buf,
1655                                            in_buffer.len, 1);
1656                         free(ctx.name);
1657
1658                         if (result != XML_STATUS_OK) {
1659                                 fprintf(stderr, "XML error: %s\n",
1660                                         XML_ErrorString(
1661                                                 XML_GetErrorCode(parser)));
1662                                 lock_flags = 0;
1663                         }
1664                         XML_ParserFree(parser);
1665                         if (!lock_flags)
1666                                 error("no DAV locking support on %s",
1667                                       repo->url);
1668
1669                 } else {
1670                         error("Cannot access URL %s, return code %d",
1671                               repo->url, results.curl_result);
1672                         lock_flags = 0;
1673                 }
1674         } else {
1675                 error("Unable to start PROPFIND request on %s", repo->url);
1676         }
1677
1678         strbuf_release(&out_buffer.buf);
1679         strbuf_release(&in_buffer);
1680         curl_slist_free_all(dav_headers);
1681
1682         return lock_flags;
1683 }
1684
1685 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1686 {
1687         struct object_list *entry = xmalloc(sizeof(struct object_list));
1688         entry->item = obj;
1689         entry->next = *p;
1690         *p = entry;
1691         return &entry->next;
1692 }
1693
1694 static struct object_list **process_blob(struct blob *blob,
1695                                          struct object_list **p,
1696                                          struct name_path *path,
1697                                          const char *name)
1698 {
1699         struct object *obj = &blob->object;
1700
1701         obj->flags |= LOCAL;
1702
1703         if (obj->flags & (UNINTERESTING | SEEN))
1704                 return p;
1705
1706         obj->flags |= SEEN;
1707         return add_one_object(obj, p);
1708 }
1709
1710 static struct object_list **process_tree(struct tree *tree,
1711                                          struct object_list **p,
1712                                          struct name_path *path,
1713                                          const char *name)
1714 {
1715         struct object *obj = &tree->object;
1716         struct tree_desc desc;
1717         struct name_entry entry;
1718         struct name_path me;
1719
1720         obj->flags |= LOCAL;
1721
1722         if (obj->flags & (UNINTERESTING | SEEN))
1723                 return p;
1724         if (parse_tree(tree) < 0)
1725                 die("bad tree object %s", sha1_to_hex(obj->sha1));
1726
1727         obj->flags |= SEEN;
1728         name = xstrdup(name);
1729         p = add_one_object(obj, p);
1730         me.up = path;
1731         me.elem = name;
1732         me.elem_len = strlen(name);
1733
1734         init_tree_desc(&desc, tree->buffer, tree->size);
1735
1736         while (tree_entry(&desc, &entry))
1737                 switch (object_type(entry.mode)) {
1738                 case OBJ_TREE:
1739                         p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1740                         break;
1741                 case OBJ_BLOB:
1742                         p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1743                         break;
1744                 default:
1745                         /* Subproject commit - not in this repository */
1746                         break;
1747                 }
1748
1749         free(tree->buffer);
1750         tree->buffer = NULL;
1751         return p;
1752 }
1753
1754 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1755 {
1756         int i;
1757         struct commit *commit;
1758         struct object_list **p = &objects;
1759         int count = 0;
1760
1761         while ((commit = get_revision(revs)) != NULL) {
1762                 p = process_tree(commit->tree, p, NULL, "");
1763                 commit->object.flags |= LOCAL;
1764                 if (!(commit->object.flags & UNINTERESTING))
1765                         count += add_send_request(&commit->object, lock);
1766         }
1767
1768         for (i = 0; i < revs->pending.nr; i++) {
1769                 struct object_array_entry *entry = revs->pending.objects + i;
1770                 struct object *obj = entry->item;
1771                 const char *name = entry->name;
1772
1773                 if (obj->flags & (UNINTERESTING | SEEN))
1774                         continue;
1775                 if (obj->type == OBJ_TAG) {
1776                         obj->flags |= SEEN;
1777                         p = add_one_object(obj, p);
1778                         continue;
1779                 }
1780                 if (obj->type == OBJ_TREE) {
1781                         p = process_tree((struct tree *)obj, p, NULL, name);
1782                         continue;
1783                 }
1784                 if (obj->type == OBJ_BLOB) {
1785                         p = process_blob((struct blob *)obj, p, NULL, name);
1786                         continue;
1787                 }
1788                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1789         }
1790
1791         while (objects) {
1792                 if (!(objects->item->flags & UNINTERESTING))
1793                         count += add_send_request(objects->item, lock);
1794                 objects = objects->next;
1795         }
1796
1797         return count;
1798 }
1799
1800 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1801 {
1802         struct active_request_slot *slot;
1803         struct slot_results results;
1804         struct buffer out_buffer = { STRBUF_INIT, 0 };
1805         struct curl_slist *dav_headers;
1806
1807         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1808
1809         strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1810
1811         slot = get_active_slot();
1812         slot->results = &results;
1813         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1814         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1815         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1816 #ifndef NO_CURL_IOCTL
1817         curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1818         curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1819 #endif
1820         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1821         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1822         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1823         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1824         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1825         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1826
1827         if (start_active_slot(slot)) {
1828                 run_active_slot(slot);
1829                 strbuf_release(&out_buffer.buf);
1830                 if (results.curl_result != CURLE_OK) {
1831                         fprintf(stderr,
1832                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1833                                 results.curl_result, results.http_code);
1834                         /* We should attempt recovery? */
1835                         return 0;
1836                 }
1837         } else {
1838                 strbuf_release(&out_buffer.buf);
1839                 fprintf(stderr, "Unable to start PUT request\n");
1840                 return 0;
1841         }
1842
1843         return 1;
1844 }
1845
1846 static struct ref *remote_refs, **remote_tail;
1847
1848 static void one_remote_ref(char *refname)
1849 {
1850         struct ref *ref;
1851         struct object *obj;
1852
1853         ref = alloc_ref(refname);
1854
1855         if (http_fetch_ref(repo->url, ref) != 0) {
1856                 fprintf(stderr,
1857                         "Unable to fetch ref %s from %s\n",
1858                         refname, repo->url);
1859                 free(ref);
1860                 return;
1861         }
1862
1863         /*
1864          * Fetch a copy of the object if it doesn't exist locally - it
1865          * may be required for updating server info later.
1866          */
1867         if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1868                 obj = lookup_unknown_object(ref->old_sha1);
1869                 if (obj) {
1870                         fprintf(stderr, "  fetch %s for %s\n",
1871                                 sha1_to_hex(ref->old_sha1), refname);
1872                         add_fetch_request(obj);
1873                 }
1874         }
1875
1876         *remote_tail = ref;
1877         remote_tail = &ref->next;
1878 }
1879
1880 static void get_dav_remote_heads(void)
1881 {
1882         remote_tail = &remote_refs;
1883         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1884 }
1885
1886 static int is_zero_sha1(const unsigned char *sha1)
1887 {
1888         int i;
1889
1890         for (i = 0; i < 20; i++) {
1891                 if (*sha1++)
1892                         return 0;
1893         }
1894         return 1;
1895 }
1896
1897 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1898 {
1899         struct strbuf *buf = (struct strbuf *)ls->userData;
1900         struct object *o;
1901         int len;
1902         char *ref_info;
1903         struct ref *ref;
1904
1905         ref = alloc_ref(ls->dentry_name);
1906
1907         if (http_fetch_ref(repo->url, ref) != 0) {
1908                 fprintf(stderr,
1909                         "Unable to fetch ref %s from %s\n",
1910                         ls->dentry_name, repo->url);
1911                 aborted = 1;
1912                 free(ref);
1913                 return;
1914         }
1915
1916         o = parse_object(ref->old_sha1);
1917         if (!o) {
1918                 fprintf(stderr,
1919                         "Unable to parse object %s for remote ref %s\n",
1920                         sha1_to_hex(ref->old_sha1), ls->dentry_name);
1921                 aborted = 1;
1922                 free(ref);
1923                 return;
1924         }
1925
1926         len = strlen(ls->dentry_name) + 42;
1927         ref_info = xcalloc(len + 1, 1);
1928         sprintf(ref_info, "%s   %s\n",
1929                 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1930         fwrite_buffer(ref_info, 1, len, buf);
1931         free(ref_info);
1932
1933         if (o->type == OBJ_TAG) {
1934                 o = deref_tag(o, ls->dentry_name, 0);
1935                 if (o) {
1936                         len = strlen(ls->dentry_name) + 45;
1937                         ref_info = xcalloc(len + 1, 1);
1938                         sprintf(ref_info, "%s   %s^{}\n",
1939                                 sha1_to_hex(o->sha1), ls->dentry_name);
1940                         fwrite_buffer(ref_info, 1, len, buf);
1941                         free(ref_info);
1942                 }
1943         }
1944         free(ref);
1945 }
1946
1947 static void update_remote_info_refs(struct remote_lock *lock)
1948 {
1949         struct buffer buffer = { STRBUF_INIT, 0 };
1950         struct active_request_slot *slot;
1951         struct slot_results results;
1952         struct curl_slist *dav_headers;
1953
1954         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1955                   add_remote_info_ref, &buffer.buf);
1956         if (!aborted) {
1957                 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1958
1959                 slot = get_active_slot();
1960                 slot->results = &results;
1961                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1962                 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1963                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1964 #ifndef NO_CURL_IOCTL
1965                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1966                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1967 #endif
1968                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1969                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1970                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1971                 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1972                 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1973                 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1974
1975                 if (start_active_slot(slot)) {
1976                         run_active_slot(slot);
1977                         if (results.curl_result != CURLE_OK) {
1978                                 fprintf(stderr,
1979                                         "PUT error: curl result=%d, HTTP code=%ld\n",
1980                                         results.curl_result, results.http_code);
1981                         }
1982                 }
1983         }
1984         strbuf_release(&buffer.buf);
1985 }
1986
1987 static int remote_exists(const char *path)
1988 {
1989         char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1990         struct active_request_slot *slot;
1991         struct slot_results results;
1992         int ret = -1;
1993
1994         sprintf(url, "%s%s", repo->url, path);
1995
1996         slot = get_active_slot();
1997         slot->results = &results;
1998         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1999         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2000
2001         if (start_active_slot(slot)) {
2002                 run_active_slot(slot);
2003                 if (results.http_code == 404)
2004                         ret = 0;
2005                 else if (results.curl_result == CURLE_OK)
2006                         ret = 1;
2007                 else
2008                         fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2009         } else {
2010                 fprintf(stderr, "Unable to start HEAD request\n");
2011         }
2012
2013         free(url);
2014         return ret;
2015 }
2016
2017 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2018 {
2019         char *url;
2020         struct strbuf buffer = STRBUF_INIT;
2021         struct active_request_slot *slot;
2022         struct slot_results results;
2023
2024         url = xmalloc(strlen(repo->url) + strlen(path) + 1);
2025         sprintf(url, "%s%s", repo->url, path);
2026
2027         slot = get_active_slot();
2028         slot->results = &results;
2029         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2030         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2031         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2032         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2033         if (start_active_slot(slot)) {
2034                 run_active_slot(slot);
2035                 if (results.curl_result != CURLE_OK) {
2036                         die("Couldn't get %s for remote symref\n%s",
2037                             url, curl_errorstr);
2038                 }
2039         } else {
2040                 die("Unable to start remote symref request");
2041         }
2042         free(url);
2043
2044         free(*symref);
2045         *symref = NULL;
2046         hashclr(sha1);
2047
2048         if (buffer.len == 0)
2049                 return;
2050
2051         /* If it's a symref, set the refname; otherwise try for a sha1 */
2052         if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2053                 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2054         } else {
2055                 get_sha1_hex(buffer.buf, sha1);
2056         }
2057
2058         strbuf_release(&buffer);
2059 }
2060
2061 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2062 {
2063         struct commit *head = lookup_commit(head_sha1);
2064         struct commit *branch = lookup_commit(branch_sha1);
2065         struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2066
2067         return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2068 }
2069
2070 static int delete_remote_branch(char *pattern, int force)
2071 {
2072         struct ref *refs = remote_refs;
2073         struct ref *remote_ref = NULL;
2074         unsigned char head_sha1[20];
2075         char *symref = NULL;
2076         int match;
2077         int patlen = strlen(pattern);
2078         int i;
2079         struct active_request_slot *slot;
2080         struct slot_results results;
2081         char *url;
2082
2083         /* Find the remote branch(es) matching the specified branch name */
2084         for (match = 0; refs; refs = refs->next) {
2085                 char *name = refs->name;
2086                 int namelen = strlen(name);
2087                 if (namelen < patlen ||
2088                     memcmp(name + namelen - patlen, pattern, patlen))
2089                         continue;
2090                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2091                         continue;
2092                 match++;
2093                 remote_ref = refs;
2094         }
2095         if (match == 0)
2096                 return error("No remote branch matches %s", pattern);
2097         if (match != 1)
2098                 return error("More than one remote branch matches %s",
2099                              pattern);
2100
2101         /*
2102          * Remote HEAD must be a symref (not exactly foolproof; a remote
2103          * symlink to a symref will look like a symref)
2104          */
2105         fetch_symref("HEAD", &symref, head_sha1);
2106         if (!symref)
2107                 return error("Remote HEAD is not a symref");
2108
2109         /* Remote branch must not be the remote HEAD */
2110         for (i=0; symref && i<MAXDEPTH; i++) {
2111                 if (!strcmp(remote_ref->name, symref))
2112                         return error("Remote branch %s is the current HEAD",
2113                                      remote_ref->name);
2114                 fetch_symref(symref, &symref, head_sha1);
2115         }
2116
2117         /* Run extra sanity checks if delete is not forced */
2118         if (!force) {
2119                 /* Remote HEAD must resolve to a known object */
2120                 if (symref)
2121                         return error("Remote HEAD symrefs too deep");
2122                 if (is_zero_sha1(head_sha1))
2123                         return error("Unable to resolve remote HEAD");
2124                 if (!has_sha1_file(head_sha1))
2125                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2126
2127                 /* Remote branch must resolve to a known object */
2128                 if (is_zero_sha1(remote_ref->old_sha1))
2129                         return error("Unable to resolve remote branch %s",
2130                                      remote_ref->name);
2131                 if (!has_sha1_file(remote_ref->old_sha1))
2132                         return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
2133
2134                 /* Remote branch must be an ancestor of remote HEAD */
2135                 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2136                         return error("The branch '%s' is not an ancestor "
2137                                      "of your current HEAD.\n"
2138                                      "If you are sure you want to delete it,"
2139                                      " run:\n\t'git http-push -D %s %s'",
2140                                      remote_ref->name, repo->url, pattern);
2141                 }
2142         }
2143
2144         /* Send delete request */
2145         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2146         if (dry_run)
2147                 return 0;
2148         url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2149         sprintf(url, "%s%s", repo->url, remote_ref->name);
2150         slot = get_active_slot();
2151         slot->results = &results;
2152         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2153         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2154         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2155         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2156         if (start_active_slot(slot)) {
2157                 run_active_slot(slot);
2158                 free(url);
2159                 if (results.curl_result != CURLE_OK)
2160                         return error("DELETE request failed (%d/%ld)\n",
2161                                      results.curl_result, results.http_code);
2162         } else {
2163                 free(url);
2164                 return error("Unable to start DELETE request");
2165         }
2166
2167         return 0;
2168 }
2169
2170 int main(int argc, char **argv)
2171 {
2172         struct transfer_request *request;
2173         struct transfer_request *next_request;
2174         int nr_refspec = 0;
2175         char **refspec = NULL;
2176         struct remote_lock *ref_lock = NULL;
2177         struct remote_lock *info_ref_lock = NULL;
2178         struct rev_info revs;
2179         int delete_branch = 0;
2180         int force_delete = 0;
2181         int objects_to_send;
2182         int rc = 0;
2183         int i;
2184         int new_refs;
2185         struct ref *ref, *local_refs;
2186         struct remote *remote;
2187         char *rewritten_url = NULL;
2188
2189         git_extract_argv0_path(argv[0]);
2190
2191         setup_git_directory();
2192
2193         repo = xcalloc(sizeof(*repo), 1);
2194
2195         argv++;
2196         for (i = 1; i < argc; i++, argv++) {
2197                 char *arg = *argv;
2198
2199                 if (*arg == '-') {
2200                         if (!strcmp(arg, "--all")) {
2201                                 push_all = MATCH_REFS_ALL;
2202                                 continue;
2203                         }
2204                         if (!strcmp(arg, "--force")) {
2205                                 force_all = 1;
2206                                 continue;
2207                         }
2208                         if (!strcmp(arg, "--dry-run")) {
2209                                 dry_run = 1;
2210                                 continue;
2211                         }
2212                         if (!strcmp(arg, "--verbose")) {
2213                                 push_verbosely = 1;
2214                                 continue;
2215                         }
2216                         if (!strcmp(arg, "-d")) {
2217                                 delete_branch = 1;
2218                                 continue;
2219                         }
2220                         if (!strcmp(arg, "-D")) {
2221                                 delete_branch = 1;
2222                                 force_delete = 1;
2223                                 continue;
2224                         }
2225                 }
2226                 if (!repo->url) {
2227                         char *path = strstr(arg, "//");
2228                         repo->url = arg;
2229                         repo->path_len = strlen(arg);
2230                         if (path) {
2231                                 repo->path = strchr(path+2, '/');
2232                                 if (repo->path)
2233                                         repo->path_len = strlen(repo->path);
2234                         }
2235                         continue;
2236                 }
2237                 refspec = argv;
2238                 nr_refspec = argc - i;
2239                 break;
2240         }
2241
2242 #ifndef USE_CURL_MULTI
2243         die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2244 #endif
2245
2246         if (!repo->url)
2247                 usage(http_push_usage);
2248
2249         if (delete_branch && nr_refspec != 1)
2250                 die("You must specify only one branch name when deleting a remote branch");
2251
2252         memset(remote_dir_exists, -1, 256);
2253
2254         /*
2255          * Create a minimum remote by hand to give to http_init(),
2256          * primarily to allow it to look at the URL.
2257          */
2258         remote = xcalloc(sizeof(*remote), 1);
2259         ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2260         remote->url[remote->url_nr++] = repo->url;
2261         http_init(remote);
2262
2263         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2264
2265         if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2266                 rewritten_url = xmalloc(strlen(repo->url)+2);
2267                 strcpy(rewritten_url, repo->url);
2268                 strcat(rewritten_url, "/");
2269                 repo->path = rewritten_url + (repo->path - repo->url);
2270                 repo->path_len++;
2271                 repo->url = rewritten_url;
2272         }
2273
2274         /* Verify DAV compliance/lock support */
2275         if (!locking_available()) {
2276                 rc = 1;
2277                 goto cleanup;
2278         }
2279
2280         sigchain_push_common(remove_locks_on_signal);
2281
2282         /* Check whether the remote has server info files */
2283         repo->can_update_info_refs = 0;
2284         repo->has_info_refs = remote_exists("info/refs");
2285         repo->has_info_packs = remote_exists("objects/info/packs");
2286         if (repo->has_info_refs) {
2287                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2288                 if (info_ref_lock)
2289                         repo->can_update_info_refs = 1;
2290                 else {
2291                         error("cannot lock existing info/refs");
2292                         rc = 1;
2293                         goto cleanup;
2294                 }
2295         }
2296         if (repo->has_info_packs)
2297                 fetch_indices();
2298
2299         /* Get a list of all local and remote heads to validate refspecs */
2300         local_refs = get_local_heads();
2301         fprintf(stderr, "Fetching remote heads...\n");
2302         get_dav_remote_heads();
2303
2304         /* Remove a remote branch if -d or -D was specified */
2305         if (delete_branch) {
2306                 if (delete_remote_branch(refspec[0], force_delete) == -1)
2307                         fprintf(stderr, "Unable to delete remote branch %s\n",
2308                                 refspec[0]);
2309                 goto cleanup;
2310         }
2311
2312         /* match them up */
2313         if (!remote_tail)
2314                 remote_tail = &remote_refs;
2315         if (match_refs(local_refs, remote_refs, &remote_tail,
2316                        nr_refspec, (const char **) refspec, push_all)) {
2317                 rc = -1;
2318                 goto cleanup;
2319         }
2320         if (!remote_refs) {
2321                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2322                 rc = 0;
2323                 goto cleanup;
2324         }
2325
2326         new_refs = 0;
2327         for (ref = remote_refs; ref; ref = ref->next) {
2328                 char old_hex[60], *new_hex;
2329                 const char *commit_argv[4];
2330                 int commit_argc;
2331                 char *new_sha1_hex, *old_sha1_hex;
2332
2333                 if (!ref->peer_ref)
2334                         continue;
2335
2336                 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2337                         if (delete_remote_branch(ref->name, 1) == -1) {
2338                                 error("Could not remove %s", ref->name);
2339                                 rc = -4;
2340                         }
2341                         new_refs++;
2342                         continue;
2343                 }
2344
2345                 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2346                         if (push_verbosely || 1)
2347                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2348                         continue;
2349                 }
2350
2351                 if (!force_all &&
2352                     !is_zero_sha1(ref->old_sha1) &&
2353                     !ref->force) {
2354                         if (!has_sha1_file(ref->old_sha1) ||
2355                             !ref_newer(ref->peer_ref->new_sha1,
2356                                        ref->old_sha1)) {
2357                                 /*
2358                                  * We do not have the remote ref, or
2359                                  * we know that the remote ref is not
2360                                  * an ancestor of what we are trying to
2361                                  * push.  Either way this can be losing
2362                                  * commits at the remote end and likely
2363                                  * we were not up to date to begin with.
2364                                  */
2365                                 error("remote '%s' is not an ancestor of\n"
2366                                       "local '%s'.\n"
2367                                       "Maybe you are not up-to-date and "
2368                                       "need to pull first?",
2369                                       ref->name,
2370                                       ref->peer_ref->name);
2371                                 rc = -2;
2372                                 continue;
2373                         }
2374                 }
2375                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2376                 new_refs++;
2377                 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2378                 new_hex = sha1_to_hex(ref->new_sha1);
2379
2380                 fprintf(stderr, "updating '%s'", ref->name);
2381                 if (strcmp(ref->name, ref->peer_ref->name))
2382                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
2383                 fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
2384                 if (dry_run)
2385                         continue;
2386
2387                 /* Lock remote branch ref */
2388                 ref_lock = lock_remote(ref->name, LOCK_TIME);
2389                 if (ref_lock == NULL) {
2390                         fprintf(stderr, "Unable to lock remote branch %s\n",
2391                                 ref->name);
2392                         rc = 1;
2393                         continue;
2394                 }
2395
2396                 /* Set up revision info for this refspec */
2397                 commit_argc = 3;
2398                 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2399                 old_sha1_hex = NULL;
2400                 commit_argv[1] = "--objects";
2401                 commit_argv[2] = new_sha1_hex;
2402                 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2403                         old_sha1_hex = xmalloc(42);
2404                         sprintf(old_sha1_hex, "^%s",
2405                                 sha1_to_hex(ref->old_sha1));
2406                         commit_argv[3] = old_sha1_hex;
2407                         commit_argc++;
2408                 }
2409                 init_revisions(&revs, setup_git_directory());
2410                 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2411                 revs.edge_hint = 0; /* just in case */
2412                 free(new_sha1_hex);
2413                 if (old_sha1_hex) {
2414                         free(old_sha1_hex);
2415                         commit_argv[1] = NULL;
2416                 }
2417
2418                 /* Generate a list of objects that need to be pushed */
2419                 pushing = 0;
2420                 if (prepare_revision_walk(&revs))
2421                         die("revision walk setup failed");
2422                 mark_edges_uninteresting(revs.commits, &revs, NULL);
2423                 objects_to_send = get_delta(&revs, ref_lock);
2424                 finish_all_active_slots();
2425
2426                 /* Push missing objects to remote, this would be a
2427                    convenient time to pack them first if appropriate. */
2428                 pushing = 1;
2429                 if (objects_to_send)
2430                         fprintf(stderr, "    sending %d objects\n",
2431                                 objects_to_send);
2432 #ifdef USE_CURL_MULTI
2433                 fill_active_slots();
2434                 add_fill_function(NULL, fill_active_slot);
2435 #endif
2436                 do {
2437                         finish_all_active_slots();
2438 #ifdef USE_CURL_MULTI
2439                         fill_active_slots();
2440 #endif
2441                 } while (request_queue_head && !aborted);
2442
2443                 /* Update the remote branch if all went well */
2444                 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2445                         rc = 1;
2446
2447                 if (!rc)
2448                         fprintf(stderr, "    done\n");
2449                 unlock_remote(ref_lock);
2450                 check_locks();
2451         }
2452
2453         /* Update remote server info if appropriate */
2454         if (repo->has_info_refs && new_refs) {
2455                 if (info_ref_lock && repo->can_update_info_refs) {
2456                         fprintf(stderr, "Updating remote server info\n");
2457                         if (!dry_run)
2458                                 update_remote_info_refs(info_ref_lock);
2459                 } else {
2460                         fprintf(stderr, "Unable to update server info\n");
2461                 }
2462         }
2463
2464  cleanup:
2465         free(rewritten_url);
2466         if (info_ref_lock)
2467                 unlock_remote(info_ref_lock);
2468         free(repo);
2469
2470         curl_slist_free_all(no_pragma_header);
2471
2472         http_cleanup();
2473
2474         request = request_queue_head;
2475         while (request != NULL) {
2476                 next_request = request->next;
2477                 release_request(request);
2478                 request = next_request;
2479         }
2480
2481         return rc;
2482 }