git.oblomov.eu Git - git/blob - remote-curl.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "remote.h"
   4 #include "connect.h"
   5 #include "strbuf.h"
   6 #include "walker.h"
   7 #include "http.h"
   8 #include "exec-cmd.h"
   9 #include "run-command.h"
  10 #include "pkt-line.h"
  11 #include "string-list.h"
  12 #include "sideband.h"
  13 #include "argv-array.h"
  14 #include "credential.h"
  15 #include "sha1-array.h"
  16 #include "send-pack.h"
  17 #include "protocol.h"
  18 #include "quote.h"
  19
  20 static struct remote *remote;
  21 /* always ends with a trailing slash */
  22 static struct strbuf url = STRBUF_INIT;
  23
  24 struct options {
  25         int verbosity;
  26         unsigned long depth;
  27         char *deepen_since;
  28         struct string_list deepen_not;
  29         struct string_list push_options;
  30         char *filter;
  31         unsigned progress : 1,
  32                 check_self_contained_and_connected : 1,
  33                 cloning : 1,
  34                 update_shallow : 1,
  35                 followtags : 1,
  36                 dry_run : 1,
  37                 thin : 1,
  38                 /* One of the SEND_PACK_PUSH_CERT_* constants. */
  39                 push_cert : 2,
  40                 deepen_relative : 1,
  41                 from_promisor : 1,
  42                 no_dependents : 1;
  43 };
  44 static struct options options;
  45 static struct string_list cas_options = STRING_LIST_INIT_DUP;
  46
  47 static int set_option(const char *name, const char *value)
  48 {
  49         if (!strcmp(name, "verbosity")) {
  50                 char *end;
  51                 int v = strtol(value, &end, 10);
  52                 if (value == end || *end)
  53                         return -1;
  54                 options.verbosity = v;
  55                 return 0;
  56         }
  57         else if (!strcmp(name, "progress")) {
  58                 if (!strcmp(value, "true"))
  59                         options.progress = 1;
  60                 else if (!strcmp(value, "false"))
  61                         options.progress = 0;
  62                 else
  63                         return -1;
  64                 return 0;
  65         }
  66         else if (!strcmp(name, "depth")) {
  67                 char *end;
  68                 unsigned long v = strtoul(value, &end, 10);
  69                 if (value == end || *end)
  70                         return -1;
  71                 options.depth = v;
  72                 return 0;
  73         }
  74         else if (!strcmp(name, "deepen-since")) {
  75                 options.deepen_since = xstrdup(value);
  76                 return 0;
  77         }
  78         else if (!strcmp(name, "deepen-not")) {
  79                 string_list_append(&options.deepen_not, value);
  80                 return 0;
  81         }
  82         else if (!strcmp(name, "deepen-relative")) {
  83                 if (!strcmp(value, "true"))
  84                         options.deepen_relative = 1;
  85                 else if (!strcmp(value, "false"))
  86                         options.deepen_relative = 0;
  87                 else
  88                         return -1;
  89                 return 0;
  90         }
  91         else if (!strcmp(name, "followtags")) {
  92                 if (!strcmp(value, "true"))
  93                         options.followtags = 1;
  94                 else if (!strcmp(value, "false"))
  95                         options.followtags = 0;
  96                 else
  97                         return -1;
  98                 return 0;
  99         }
 100         else if (!strcmp(name, "dry-run")) {
 101                 if (!strcmp(value, "true"))
 102                         options.dry_run = 1;
 103                 else if (!strcmp(value, "false"))
 104                         options.dry_run = 0;
 105                 else
 106                         return -1;
 107                 return 0;
 108         }
 109         else if (!strcmp(name, "check-connectivity")) {
 110                 if (!strcmp(value, "true"))
 111                         options.check_self_contained_and_connected = 1;
 112                 else if (!strcmp(value, "false"))
 113                         options.check_self_contained_and_connected = 0;
 114                 else
 115                         return -1;
 116                 return 0;
 117         }
 118         else if (!strcmp(name, "cas")) {
 119                 struct strbuf val = STRBUF_INIT;
 120                 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
 121                 string_list_append(&cas_options, val.buf);
 122                 strbuf_release(&val);
 123                 return 0;
 124         } else if (!strcmp(name, "cloning")) {
 125                 if (!strcmp(value, "true"))
 126                         options.cloning = 1;
 127                 else if (!strcmp(value, "false"))
 128                         options.cloning = 0;
 129                 else
 130                         return -1;
 131                 return 0;
 132         } else if (!strcmp(name, "update-shallow")) {
 133                 if (!strcmp(value, "true"))
 134                         options.update_shallow = 1;
 135                 else if (!strcmp(value, "false"))
 136                         options.update_shallow = 0;
 137                 else
 138                         return -1;
 139                 return 0;
 140         } else if (!strcmp(name, "pushcert")) {
 141                 if (!strcmp(value, "true"))
 142                         options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 143                 else if (!strcmp(value, "false"))
 144                         options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 145                 else if (!strcmp(value, "if-asked"))
 146                         options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 147                 else
 148                         return -1;
 149                 return 0;
 150         } else if (!strcmp(name, "push-option")) {
 151                 if (*value != '"')
 152                         string_list_append(&options.push_options, value);
 153                 else {
 154                         struct strbuf unquoted = STRBUF_INIT;
 155                         if (unquote_c_style(&unquoted, value, NULL) < 0)
 156                                 die("invalid quoting in push-option value");
 157                         string_list_append_nodup(&options.push_options,
 158                                                  strbuf_detach(&unquoted, NULL));
 159                 }
 160                 return 0;
 161
 162 #if LIBCURL_VERSION_NUM >= 0x070a08
 163         } else if (!strcmp(name, "family")) {
 164                 if (!strcmp(value, "ipv4"))
 165                         git_curl_ipresolve = CURL_IPRESOLVE_V4;
 166                 else if (!strcmp(value, "ipv6"))
 167                         git_curl_ipresolve = CURL_IPRESOLVE_V6;
 168                 else if (!strcmp(value, "all"))
 169                         git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
 170                 else
 171                         return -1;
 172                 return 0;
 173 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
 174         } else if (!strcmp(name, "from-promisor")) {
 175                 options.from_promisor = 1;
 176                 return 0;
 177         } else if (!strcmp(name, "no-dependents")) {
 178                 options.no_dependents = 1;
 179                 return 0;
 180         } else if (!strcmp(name, "filter")) {
 181                 options.filter = xstrdup(value);
 182                 return 0;
 183         } else {
 184                 return 1 /* unsupported */;
 185         }
 186 }
 187
 188 struct discovery {
 189         char *service;
 190         char *buf_alloc;
 191         char *buf;
 192         size_t len;
 193         struct ref *refs;
 194         struct oid_array shallow;
 195         enum protocol_version version;
 196         unsigned proto_git : 1;
 197 };
 198 static struct discovery *last_discovery;
 199
 200 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 201 {
 202         struct ref *list = NULL;
 203         struct packet_reader reader;
 204
 205         packet_reader_init(&reader, -1, heads->buf, heads->len,
 206                            PACKET_READ_CHOMP_NEWLINE |
 207                            PACKET_READ_GENTLE_ON_EOF);
 208
 209         heads->version = discover_version(&reader);
 210         switch (heads->version) {
 211         case protocol_v2:
 212                 /*
 213                  * Do nothing.  This isn't a list of refs but rather a
 214                  * capability advertisement.  Client would have run
 215                  * 'stateless-connect' so we'll dump this capability listing
 216                  * and let them request the refs themselves.
 217                  */
 218                 break;
 219         case protocol_v1:
 220         case protocol_v0:
 221                 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
 222                                  NULL, &heads->shallow);
 223                 break;
 224         case protocol_unknown_version:
 225                 BUG("unknown protocol version");
 226         }
 227
 228         return list;
 229 }
 230
 231 static struct ref *parse_info_refs(struct discovery *heads)
 232 {
 233         char *data, *start, *mid;
 234         char *ref_name;
 235         int i = 0;
 236
 237         struct ref *refs = NULL;
 238         struct ref *ref = NULL;
 239         struct ref *last_ref = NULL;
 240
 241         data = heads->buf;
 242         start = NULL;
 243         mid = data;
 244         while (i < heads->len) {
 245                 if (!start) {
 246                         start = &data[i];
 247                 }
 248                 if (data[i] == '\t')
 249                         mid = &data[i];
 250                 if (data[i] == '\n') {
 251                         if (mid - start != 40)
 252                                 die("%sinfo/refs not valid: is this a git repository?",
 253                                     url.buf);
 254                         data[i] = 0;
 255                         ref_name = mid + 1;
 256                         ref = alloc_ref(ref_name);
 257                         get_oid_hex(start, &ref->old_oid);
 258                         if (!refs)
 259                                 refs = ref;
 260                         if (last_ref)
 261                                 last_ref->next = ref;
 262                         last_ref = ref;
 263                         start = NULL;
 264                 }
 265                 i++;
 266         }
 267
 268         ref = alloc_ref("HEAD");
 269         if (!http_fetch_ref(url.buf, ref) &&
 270             !resolve_remote_symref(ref, refs)) {
 271                 ref->next = refs;
 272                 refs = ref;
 273         } else {
 274                 free(ref);
 275         }
 276
 277         return refs;
 278 }
 279
 280 static void free_discovery(struct discovery *d)
 281 {
 282         if (d) {
 283                 if (d == last_discovery)
 284                         last_discovery = NULL;
 285                 free(d->shallow.oid);
 286                 free(d->buf_alloc);
 287                 free_refs(d->refs);
 288                 free(d->service);
 289                 free(d);
 290         }
 291 }
 292
 293 static int show_http_message(struct strbuf *type, struct strbuf *charset,
 294                              struct strbuf *msg)
 295 {
 296         const char *p, *eol;
 297
 298         /*
 299          * We only show text/plain parts, as other types are likely
 300          * to be ugly to look at on the user's terminal.
 301          */
 302         if (strcmp(type->buf, "text/plain"))
 303                 return -1;
 304         if (charset->len)
 305                 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 306
 307         strbuf_trim(msg);
 308         if (!msg->len)
 309                 return -1;
 310
 311         p = msg->buf;
 312         do {
 313                 eol = strchrnul(p, '\n');
 314                 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 315                 p = eol + 1;
 316         } while(*eol);
 317         return 0;
 318 }
 319
 320 static int get_protocol_http_header(enum protocol_version version,
 321                                     struct strbuf *header)
 322 {
 323         if (version > 0) {
 324                 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
 325                             version);
 326
 327                 return 1;
 328         }
 329
 330         return 0;
 331 }
 332
 333 static struct discovery *discover_refs(const char *service, int for_push)
 334 {
 335         struct strbuf exp = STRBUF_INIT;
 336         struct strbuf type = STRBUF_INIT;
 337         struct strbuf charset = STRBUF_INIT;
 338         struct strbuf buffer = STRBUF_INIT;
 339         struct strbuf refs_url = STRBUF_INIT;
 340         struct strbuf effective_url = STRBUF_INIT;
 341         struct strbuf protocol_header = STRBUF_INIT;
 342         struct string_list extra_headers = STRING_LIST_INIT_DUP;
 343         struct discovery *last = last_discovery;
 344         int http_ret, maybe_smart = 0;
 345         struct http_get_options http_options;
 346         enum protocol_version version = get_protocol_version_config();
 347
 348         if (last && !strcmp(service, last->service))
 349                 return last;
 350         free_discovery(last);
 351
 352         strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 353         if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 354              git_env_bool("GIT_SMART_HTTP", 1)) {
 355                 maybe_smart = 1;
 356                 if (!strchr(url.buf, '?'))
 357                         strbuf_addch(&refs_url, '?');
 358                 else
 359                         strbuf_addch(&refs_url, '&');
 360                 strbuf_addf(&refs_url, "service=%s", service);
 361         }
 362
 363         /*
 364          * NEEDSWORK: If we are trying to use protocol v2 and we are planning
 365          * to perform a push, then fallback to v0 since the client doesn't know
 366          * how to push yet using v2.
 367          */
 368         if (version == protocol_v2 && !strcmp("git-receive-pack", service))
 369                 version = protocol_v0;
 370
 371         /* Add the extra Git-Protocol header */
 372         if (get_protocol_http_header(version, &protocol_header))
 373                 string_list_append(&extra_headers, protocol_header.buf);
 374
 375         memset(&http_options, 0, sizeof(http_options));
 376         http_options.content_type = &type;
 377         http_options.charset = &charset;
 378         http_options.effective_url = &effective_url;
 379         http_options.base_url = &url;
 380         http_options.extra_headers = &extra_headers;
 381         http_options.initial_request = 1;
 382         http_options.no_cache = 1;
 383         http_options.keep_error = 1;
 384
 385         http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 386         switch (http_ret) {
 387         case HTTP_OK:
 388                 break;
 389         case HTTP_MISSING_TARGET:
 390                 show_http_message(&type, &charset, &buffer);
 391                 die("repository '%s' not found", url.buf);
 392         case HTTP_NOAUTH:
 393                 show_http_message(&type, &charset, &buffer);
 394                 die("Authentication failed for '%s'", url.buf);
 395         default:
 396                 show_http_message(&type, &charset, &buffer);
 397                 die("unable to access '%s': %s", url.buf, curl_errorstr);
 398         }
 399
 400         if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 401                 warning(_("redirecting to %s"), url.buf);
 402
 403         last= xcalloc(1, sizeof(*last_discovery));
 404         last->service = xstrdup(service);
 405         last->buf_alloc = strbuf_detach(&buffer, &last->len);
 406         last->buf = last->buf_alloc;
 407
 408         strbuf_addf(&exp, "application/x-%s-advertisement", service);
 409         if (maybe_smart &&
 410             (5 <= last->len && last->buf[4] == '#') &&
 411             !strbuf_cmp(&exp, &type)) {
 412                 struct packet_reader reader;
 413                 packet_reader_init(&reader, -1, last->buf, last->len,
 414                                    PACKET_READ_CHOMP_NEWLINE);
 415
 416                 /*
 417                  * smart HTTP response; validate that the service
 418                  * pkt-line matches our request.
 419                  */
 420                 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
 421                         die("invalid server response; expected service, got flush packet");
 422
 423                 strbuf_reset(&exp);
 424                 strbuf_addf(&exp, "# service=%s", service);
 425                 if (strcmp(reader.line, exp.buf))
 426                         die("invalid server response; got '%s'", reader.line);
 427                 strbuf_release(&exp);
 428
 429                 /* The header can include additional metadata lines, up
 430                  * until a packet flush marker.  Ignore these now, but
 431                  * in the future we might start to scan them.
 432                  */
 433                 for (;;) {
 434                         packet_reader_read(&reader);
 435                         if (reader.pktlen <= 0) {
 436                                 break;
 437                         }
 438                 }
 439
 440                 last->buf = reader.src_buffer;
 441                 last->len = reader.src_len;
 442
 443                 last->proto_git = 1;
 444         } else if (maybe_smart &&
 445                    last->len > 5 && starts_with(last->buf + 4, "version 2")) {
 446                 last->proto_git = 1;
 447         }
 448
 449         if (last->proto_git)
 450                 last->refs = parse_git_refs(last, for_push);
 451         else
 452                 last->refs = parse_info_refs(last);
 453
 454         strbuf_release(&refs_url);
 455         strbuf_release(&exp);
 456         strbuf_release(&type);
 457         strbuf_release(&charset);
 458         strbuf_release(&effective_url);
 459         strbuf_release(&buffer);
 460         strbuf_release(&protocol_header);
 461         string_list_clear(&extra_headers, 0);
 462         last_discovery = last;
 463         return last;
 464 }
 465
 466 static struct ref *get_refs(int for_push)
 467 {
 468         struct discovery *heads;
 469
 470         if (for_push)
 471                 heads = discover_refs("git-receive-pack", for_push);
 472         else
 473                 heads = discover_refs("git-upload-pack", for_push);
 474
 475         return heads->refs;
 476 }
 477
 478 static void output_refs(struct ref *refs)
 479 {
 480         struct ref *posn;
 481         for (posn = refs; posn; posn = posn->next) {
 482                 if (posn->symref)
 483                         printf("@%s %s\n", posn->symref, posn->name);
 484                 else
 485                         printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 486         }
 487         printf("\n");
 488         fflush(stdout);
 489 }
 490
 491 struct rpc_state {
 492         const char *service_name;
 493         const char **argv;
 494         struct strbuf *stdin_preamble;
 495         char *service_url;
 496         char *hdr_content_type;
 497         char *hdr_accept;
 498         char *protocol_header;
 499         char *buf;
 500         size_t alloc;
 501         size_t len;
 502         size_t pos;
 503         int in;
 504         int out;
 505         int any_written;
 506         struct strbuf result;
 507         unsigned gzip_request : 1;
 508         unsigned initial_buffer : 1;
 509 };
 510
 511 static size_t rpc_out(void *ptr, size_t eltsize,
 512                 size_t nmemb, void *buffer_)
 513 {
 514         size_t max = eltsize * nmemb;
 515         struct rpc_state *rpc = buffer_;
 516         size_t avail = rpc->len - rpc->pos;
 517
 518         if (!avail) {
 519                 rpc->initial_buffer = 0;
 520                 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 521                 if (!avail)
 522                         return 0;
 523                 rpc->pos = 0;
 524                 rpc->len = avail;
 525         }
 526
 527         if (max < avail)
 528                 avail = max;
 529         memcpy(ptr, rpc->buf + rpc->pos, avail);
 530         rpc->pos += avail;
 531         return avail;
 532 }
 533
 534 #ifndef NO_CURL_IOCTL
 535 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 536 {
 537         struct rpc_state *rpc = clientp;
 538
 539         switch (cmd) {
 540         case CURLIOCMD_NOP:
 541                 return CURLIOE_OK;
 542
 543         case CURLIOCMD_RESTARTREAD:
 544                 if (rpc->initial_buffer) {
 545                         rpc->pos = 0;
 546                         return CURLIOE_OK;
 547                 }
 548                 error("unable to rewind rpc post data - try increasing http.postBuffer");
 549                 return CURLIOE_FAILRESTART;
 550
 551         default:
 552                 return CURLIOE_UNKNOWNCMD;
 553         }
 554 }
 555 #endif
 556
 557 static size_t rpc_in(char *ptr, size_t eltsize,
 558                 size_t nmemb, void *buffer_)
 559 {
 560         size_t size = eltsize * nmemb;
 561         struct rpc_state *rpc = buffer_;
 562         if (size)
 563                 rpc->any_written = 1;
 564         write_or_die(rpc->in, ptr, size);
 565         return size;
 566 }
 567
 568 static int run_slot(struct active_request_slot *slot,
 569                     struct slot_results *results)
 570 {
 571         int err;
 572         struct slot_results results_buf;
 573
 574         if (!results)
 575                 results = &results_buf;
 576
 577         err = run_one_slot(slot, results);
 578
 579         if (err != HTTP_OK && err != HTTP_REAUTH) {
 580                 struct strbuf msg = STRBUF_INIT;
 581                 if (results->http_code && results->http_code != 200)
 582                         strbuf_addf(&msg, "HTTP %ld", results->http_code);
 583                 if (results->curl_result != CURLE_OK) {
 584                         if (msg.len)
 585                                 strbuf_addch(&msg, ' ');
 586                         strbuf_addf(&msg, "curl %d", results->curl_result);
 587                         if (curl_errorstr[0]) {
 588                                 strbuf_addch(&msg, ' ');
 589                                 strbuf_addstr(&msg, curl_errorstr);
 590                         }
 591                 }
 592                 error("RPC failed; %s", msg.buf);
 593                 strbuf_release(&msg);
 594         }
 595
 596         return err;
 597 }
 598
 599 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 600 {
 601         struct active_request_slot *slot;
 602         struct curl_slist *headers = http_copy_default_headers();
 603         struct strbuf buf = STRBUF_INIT;
 604         int err;
 605
 606         slot = get_active_slot();
 607
 608         headers = curl_slist_append(headers, rpc->hdr_content_type);
 609         headers = curl_slist_append(headers, rpc->hdr_accept);
 610
 611         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 612         curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 613         curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 614         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 615         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 616         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 617         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 618         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 619         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 620
 621         err = run_slot(slot, results);
 622
 623         curl_slist_free_all(headers);
 624         strbuf_release(&buf);
 625         return err;
 626 }
 627
 628 static curl_off_t xcurl_off_t(size_t len) {
 629         uintmax_t size = len;
 630         if (size > maximum_signed_value_of_type(curl_off_t))
 631                 die("cannot handle pushes this big");
 632         return (curl_off_t)size;
 633 }
 634
 635 static int post_rpc(struct rpc_state *rpc)
 636 {
 637         struct active_request_slot *slot;
 638         struct curl_slist *headers = http_copy_default_headers();
 639         int use_gzip = rpc->gzip_request;
 640         char *gzip_body = NULL;
 641         size_t gzip_size = 0;
 642         int err, large_request = 0;
 643         int needs_100_continue = 0;
 644
 645         /* Try to load the entire request, if we can fit it into the
 646          * allocated buffer space we can use HTTP/1.0 and avoid the
 647          * chunked encoding mess.
 648          */
 649         while (1) {
 650                 size_t left = rpc->alloc - rpc->len;
 651                 char *buf = rpc->buf + rpc->len;
 652                 int n;
 653
 654                 if (left < LARGE_PACKET_MAX) {
 655                         large_request = 1;
 656                         use_gzip = 0;
 657                         break;
 658                 }
 659
 660                 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 661                 if (!n)
 662                         break;
 663                 rpc->len += n;
 664         }
 665
 666         if (large_request) {
 667                 struct slot_results results;
 668
 669                 do {
 670                         err = probe_rpc(rpc, &results);
 671                         if (err == HTTP_REAUTH)
 672                                 credential_fill(&http_auth);
 673                 } while (err == HTTP_REAUTH);
 674                 if (err != HTTP_OK)
 675                         return -1;
 676
 677                 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 678                         needs_100_continue = 1;
 679         }
 680
 681         headers = curl_slist_append(headers, rpc->hdr_content_type);
 682         headers = curl_slist_append(headers, rpc->hdr_accept);
 683         headers = curl_slist_append(headers, needs_100_continue ?
 684                 "Expect: 100-continue" : "Expect:");
 685
 686         /* Add the extra Git-Protocol header */
 687         if (rpc->protocol_header)
 688                 headers = curl_slist_append(headers, rpc->protocol_header);
 689
 690 retry:
 691         slot = get_active_slot();
 692
 693         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 694         curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 695         curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 696         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
 697
 698         if (large_request) {
 699                 /* The request body is large and the size cannot be predicted.
 700                  * We must use chunked encoding to send it.
 701                  */
 702                 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 703                 rpc->initial_buffer = 1;
 704                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 705                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 706 #ifndef NO_CURL_IOCTL
 707                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 708                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 709 #endif
 710                 if (options.verbosity > 1) {
 711                         fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 712                         fflush(stderr);
 713                 }
 714
 715         } else if (gzip_body) {
 716                 /*
 717                  * If we are looping to retry authentication, then the previous
 718                  * run will have set up the headers and gzip buffer already,
 719                  * and we just need to send it.
 720                  */
 721                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 722                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 723
 724         } else if (use_gzip && 1024 < rpc->len) {
 725                 /* The client backend isn't giving us compressed data so
 726                  * we can try to deflate it ourselves, this may save on
 727                  * the transfer time.
 728                  */
 729                 git_zstream stream;
 730                 int ret;
 731
 732                 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 733                 gzip_size = git_deflate_bound(&stream, rpc->len);
 734                 gzip_body = xmalloc(gzip_size);
 735
 736                 stream.next_in = (unsigned char *)rpc->buf;
 737                 stream.avail_in = rpc->len;
 738                 stream.next_out = (unsigned char *)gzip_body;
 739                 stream.avail_out = gzip_size;
 740
 741                 ret = git_deflate(&stream, Z_FINISH);
 742                 if (ret != Z_STREAM_END)
 743                         die("cannot deflate request; zlib deflate error %d", ret);
 744
 745                 ret = git_deflate_end_gently(&stream);
 746                 if (ret != Z_OK)
 747                         die("cannot deflate request; zlib end error %d", ret);
 748
 749                 gzip_size = stream.total_out;
 750
 751                 headers = curl_slist_append(headers, "Content-Encoding: gzip");
 752                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 753                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 754
 755                 if (options.verbosity > 1) {
 756                         fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 757                                 rpc->service_name,
 758                                 (unsigned long)rpc->len, (unsigned long)gzip_size);
 759                         fflush(stderr);
 760                 }
 761         } else {
 762                 /* We know the complete request size in advance, use the
 763                  * more normal Content-Length approach.
 764                  */
 765                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 766                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 767                 if (options.verbosity > 1) {
 768                         fprintf(stderr, "POST %s (%lu bytes)\n",
 769                                 rpc->service_name, (unsigned long)rpc->len);
 770                         fflush(stderr);
 771                 }
 772         }
 773
 774         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 775         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 776         curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 777
 778
 779         rpc->any_written = 0;
 780         err = run_slot(slot, NULL);
 781         if (err == HTTP_REAUTH && !large_request) {
 782                 credential_fill(&http_auth);
 783                 goto retry;
 784         }
 785         if (err != HTTP_OK)
 786                 err = -1;
 787
 788         if (!rpc->any_written)
 789                 err = -1;
 790
 791         curl_slist_free_all(headers);
 792         free(gzip_body);
 793         return err;
 794 }
 795
 796 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 797 {
 798         const char *svc = rpc->service_name;
 799         struct strbuf buf = STRBUF_INIT;
 800         struct strbuf *preamble = rpc->stdin_preamble;
 801         struct child_process client = CHILD_PROCESS_INIT;
 802         int err = 0;
 803
 804         client.in = -1;
 805         client.out = -1;
 806         client.git_cmd = 1;
 807         client.argv = rpc->argv;
 808         if (start_command(&client))
 809                 exit(1);
 810         if (preamble)
 811                 write_or_die(client.in, preamble->buf, preamble->len);
 812         if (heads)
 813                 write_or_die(client.in, heads->buf, heads->len);
 814
 815         rpc->alloc = http_post_buffer;
 816         rpc->buf = xmalloc(rpc->alloc);
 817         rpc->in = client.in;
 818         rpc->out = client.out;
 819         strbuf_init(&rpc->result, 0);
 820
 821         strbuf_addf(&buf, "%s%s", url.buf, svc);
 822         rpc->service_url = strbuf_detach(&buf, NULL);
 823
 824         strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 825         rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 826
 827         strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 828         rpc->hdr_accept = strbuf_detach(&buf, NULL);
 829
 830         if (get_protocol_http_header(heads->version, &buf))
 831                 rpc->protocol_header = strbuf_detach(&buf, NULL);
 832         else
 833                 rpc->protocol_header = NULL;
 834
 835         while (!err) {
 836                 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 837                 if (!n)
 838                         break;
 839                 rpc->pos = 0;
 840                 rpc->len = n;
 841                 err |= post_rpc(rpc);
 842         }
 843
 844         close(client.in);
 845         client.in = -1;
 846         if (!err) {
 847                 strbuf_read(&rpc->result, client.out, 0);
 848         } else {
 849                 char buf[4096];
 850                 for (;;)
 851                         if (xread(client.out, buf, sizeof(buf)) <= 0)
 852                                 break;
 853         }
 854
 855         close(client.out);
 856         client.out = -1;
 857
 858         err |= finish_command(&client);
 859         free(rpc->service_url);
 860         free(rpc->hdr_content_type);
 861         free(rpc->hdr_accept);
 862         free(rpc->protocol_header);
 863         free(rpc->buf);
 864         strbuf_release(&buf);
 865         return err;
 866 }
 867
 868 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 869 {
 870         struct walker *walker;
 871         char **targets;
 872         int ret, i;
 873
 874         ALLOC_ARRAY(targets, nr_heads);
 875         if (options.depth || options.deepen_since)
 876                 die("dumb http transport does not support shallow capabilities");
 877         for (i = 0; i < nr_heads; i++)
 878                 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 879
 880         walker = get_http_walker(url.buf);
 881         walker->get_verbosely = options.verbosity >= 3;
 882         walker->get_recover = 0;
 883         ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 884         walker_free(walker);
 885
 886         for (i = 0; i < nr_heads; i++)
 887                 free(targets[i]);
 888         free(targets);
 889
 890         return ret ? error("fetch failed.") : 0;
 891 }
 892
 893 static int fetch_git(struct discovery *heads,
 894         int nr_heads, struct ref **to_fetch)
 895 {
 896         struct rpc_state rpc;
 897         struct strbuf preamble = STRBUF_INIT;
 898         int i, err;
 899         struct argv_array args = ARGV_ARRAY_INIT;
 900
 901         argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 902                          "--stdin", "--lock-pack", NULL);
 903         if (options.followtags)
 904                 argv_array_push(&args, "--include-tag");
 905         if (options.thin)
 906                 argv_array_push(&args, "--thin");
 907         if (options.verbosity >= 3)
 908                 argv_array_pushl(&args, "-v", "-v", NULL);
 909         if (options.check_self_contained_and_connected)
 910                 argv_array_push(&args, "--check-self-contained-and-connected");
 911         if (options.cloning)
 912                 argv_array_push(&args, "--cloning");
 913         if (options.update_shallow)
 914                 argv_array_push(&args, "--update-shallow");
 915         if (!options.progress)
 916                 argv_array_push(&args, "--no-progress");
 917         if (options.depth)
 918                 argv_array_pushf(&args, "--depth=%lu", options.depth);
 919         if (options.deepen_since)
 920                 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 921         for (i = 0; i < options.deepen_not.nr; i++)
 922                 argv_array_pushf(&args, "--shallow-exclude=%s",
 923                                  options.deepen_not.items[i].string);
 924         if (options.deepen_relative && options.depth)
 925                 argv_array_push(&args, "--deepen-relative");
 926         if (options.from_promisor)
 927                 argv_array_push(&args, "--from-promisor");
 928         if (options.no_dependents)
 929                 argv_array_push(&args, "--no-dependents");
 930         if (options.filter)
 931                 argv_array_pushf(&args, "--filter=%s", options.filter);
 932         argv_array_push(&args, url.buf);
 933
 934         for (i = 0; i < nr_heads; i++) {
 935                 struct ref *ref = to_fetch[i];
 936                 if (!*ref->name)
 937                         die("cannot fetch by sha1 over smart http");
 938                 packet_buf_write(&preamble, "%s %s\n",
 939                                  oid_to_hex(&ref->old_oid), ref->name);
 940         }
 941         packet_buf_flush(&preamble);
 942
 943         memset(&rpc, 0, sizeof(rpc));
 944         rpc.service_name = "git-upload-pack",
 945         rpc.argv = args.argv;
 946         rpc.stdin_preamble = &preamble;
 947         rpc.gzip_request = 1;
 948
 949         err = rpc_service(&rpc, heads);
 950         if (rpc.result.len)
 951                 write_or_die(1, rpc.result.buf, rpc.result.len);
 952         strbuf_release(&rpc.result);
 953         strbuf_release(&preamble);
 954         argv_array_clear(&args);
 955         return err;
 956 }
 957
 958 static int fetch(int nr_heads, struct ref **to_fetch)
 959 {
 960         struct discovery *d = discover_refs("git-upload-pack", 0);
 961         if (d->proto_git)
 962                 return fetch_git(d, nr_heads, to_fetch);
 963         else
 964                 return fetch_dumb(nr_heads, to_fetch);
 965 }
 966
 967 static void parse_fetch(struct strbuf *buf)
 968 {
 969         struct ref **to_fetch = NULL;
 970         struct ref *list_head = NULL;
 971         struct ref **list = &list_head;
 972         int alloc_heads = 0, nr_heads = 0;
 973
 974         do {
 975                 const char *p;
 976                 if (skip_prefix(buf->buf, "fetch ", &p)) {
 977                         const char *name;
 978                         struct ref *ref;
 979                         struct object_id old_oid;
 980
 981                         if (get_oid_hex(p, &old_oid))
 982                                 die("protocol error: expected sha/ref, got %s'", p);
 983                         if (p[GIT_SHA1_HEXSZ] == ' ')
 984                                 name = p + GIT_SHA1_HEXSZ + 1;
 985                         else if (!p[GIT_SHA1_HEXSZ])
 986                                 name = "";
 987                         else
 988                                 die("protocol error: expected sha/ref, got %s'", p);
 989
 990                         ref = alloc_ref(name);
 991                         oidcpy(&ref->old_oid, &old_oid);
 992
 993                         *list = ref;
 994                         list = &ref->next;
 995
 996                         ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 997                         to_fetch[nr_heads++] = ref;
 998                 }
 999                 else
1000                         die("http transport does not support %s", buf->buf);
1001
1002                 strbuf_reset(buf);
1003                 if (strbuf_getline_lf(buf, stdin) == EOF)
1004                         return;
1005                 if (!*buf->buf)
1006                         break;
1007         } while (1);
1008
1009         if (fetch(nr_heads, to_fetch))
1010                 exit(128); /* error already reported */
1011         free_refs(list_head);
1012         free(to_fetch);
1013
1014         printf("\n");
1015         fflush(stdout);
1016         strbuf_reset(buf);
1017 }
1018
1019 static int push_dav(int nr_spec, char **specs)
1020 {
1021         struct child_process child = CHILD_PROCESS_INIT;
1022         size_t i;
1023
1024         child.git_cmd = 1;
1025         argv_array_push(&child.args, "http-push");
1026         argv_array_push(&child.args, "--helper-status");
1027         if (options.dry_run)
1028                 argv_array_push(&child.args, "--dry-run");
1029         if (options.verbosity > 1)
1030                 argv_array_push(&child.args, "--verbose");
1031         argv_array_push(&child.args, url.buf);
1032         for (i = 0; i < nr_spec; i++)
1033                 argv_array_push(&child.args, specs[i]);
1034
1035         if (run_command(&child))
1036                 die("git-http-push failed");
1037         return 0;
1038 }
1039
1040 static int push_git(struct discovery *heads, int nr_spec, char **specs)
1041 {
1042         struct rpc_state rpc;
1043         int i, err;
1044         struct argv_array args;
1045         struct string_list_item *cas_option;
1046         struct strbuf preamble = STRBUF_INIT;
1047
1048         argv_array_init(&args);
1049         argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1050                          NULL);
1051
1052         if (options.thin)
1053                 argv_array_push(&args, "--thin");
1054         if (options.dry_run)
1055                 argv_array_push(&args, "--dry-run");
1056         if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1057                 argv_array_push(&args, "--signed=yes");
1058         else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1059                 argv_array_push(&args, "--signed=if-asked");
1060         if (options.verbosity == 0)
1061                 argv_array_push(&args, "--quiet");
1062         else if (options.verbosity > 1)
1063                 argv_array_push(&args, "--verbose");
1064         for (i = 0; i < options.push_options.nr; i++)
1065                 argv_array_pushf(&args, "--push-option=%s",
1066                                  options.push_options.items[i].string);
1067         argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1068         for_each_string_list_item(cas_option, &cas_options)
1069                 argv_array_push(&args, cas_option->string);
1070         argv_array_push(&args, url.buf);
1071
1072         argv_array_push(&args, "--stdin");
1073         for (i = 0; i < nr_spec; i++)
1074                 packet_buf_write(&preamble, "%s\n", specs[i]);
1075         packet_buf_flush(&preamble);
1076
1077         memset(&rpc, 0, sizeof(rpc));
1078         rpc.service_name = "git-receive-pack",
1079         rpc.argv = args.argv;
1080         rpc.stdin_preamble = &preamble;
1081
1082         err = rpc_service(&rpc, heads);
1083         if (rpc.result.len)
1084                 write_or_die(1, rpc.result.buf, rpc.result.len);
1085         strbuf_release(&rpc.result);
1086         strbuf_release(&preamble);
1087         argv_array_clear(&args);
1088         return err;
1089 }
1090
1091 static int push(int nr_spec, char **specs)
1092 {
1093         struct discovery *heads = discover_refs("git-receive-pack", 1);
1094         int ret;
1095
1096         if (heads->proto_git)
1097                 ret = push_git(heads, nr_spec, specs);
1098         else
1099                 ret = push_dav(nr_spec, specs);
1100         free_discovery(heads);
1101         return ret;
1102 }
1103
1104 static void parse_push(struct strbuf *buf)
1105 {
1106         char **specs = NULL;
1107         int alloc_spec = 0, nr_spec = 0, i, ret;
1108
1109         do {
1110                 if (starts_with(buf->buf, "push ")) {
1111                         ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1112                         specs[nr_spec++] = xstrdup(buf->buf + 5);
1113                 }
1114                 else
1115                         die("http transport does not support %s", buf->buf);
1116
1117                 strbuf_reset(buf);
1118                 if (strbuf_getline_lf(buf, stdin) == EOF)
1119                         goto free_specs;
1120                 if (!*buf->buf)
1121                         break;
1122         } while (1);
1123
1124         ret = push(nr_spec, specs);
1125         printf("\n");
1126         fflush(stdout);
1127
1128         if (ret)
1129                 exit(128); /* error already reported */
1130
1131  free_specs:
1132         for (i = 0; i < nr_spec; i++)
1133                 free(specs[i]);
1134         free(specs);
1135 }
1136
1137 /*
1138  * Used to represent the state of a connection to an HTTP server when
1139  * communicating using git's wire-protocol version 2.
1140  */
1141 struct proxy_state {
1142         char *service_name;
1143         char *service_url;
1144         struct curl_slist *headers;
1145         struct strbuf request_buffer;
1146         int in;
1147         int out;
1148         struct packet_reader reader;
1149         size_t pos;
1150         int seen_flush;
1151 };
1152
1153 static void proxy_state_init(struct proxy_state *p, const char *service_name,
1154                              enum protocol_version version)
1155 {
1156         struct strbuf buf = STRBUF_INIT;
1157
1158         memset(p, 0, sizeof(*p));
1159         p->service_name = xstrdup(service_name);
1160
1161         p->in = 0;
1162         p->out = 1;
1163         strbuf_init(&p->request_buffer, 0);
1164
1165         strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1166         p->service_url = strbuf_detach(&buf, NULL);
1167
1168         p->headers = http_copy_default_headers();
1169
1170         strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1171         p->headers = curl_slist_append(p->headers, buf.buf);
1172         strbuf_reset(&buf);
1173
1174         strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1175         p->headers = curl_slist_append(p->headers, buf.buf);
1176         strbuf_reset(&buf);
1177
1178         p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1179
1180         /* Add the Git-Protocol header */
1181         if (get_protocol_http_header(version, &buf))
1182                 p->headers = curl_slist_append(p->headers, buf.buf);
1183
1184         packet_reader_init(&p->reader, p->in, NULL, 0,
1185                            PACKET_READ_GENTLE_ON_EOF);
1186
1187         strbuf_release(&buf);
1188 }
1189
1190 static void proxy_state_clear(struct proxy_state *p)
1191 {
1192         free(p->service_name);
1193         free(p->service_url);
1194         curl_slist_free_all(p->headers);
1195         strbuf_release(&p->request_buffer);
1196 }
1197
1198 /*
1199  * CURLOPT_READFUNCTION callback function.
1200  * Attempts to copy over a single packet-line at a time into the
1201  * curl provided buffer.
1202  */
1203 static size_t proxy_in(char *buffer, size_t eltsize,
1204                        size_t nmemb, void *userdata)
1205 {
1206         size_t max;
1207         struct proxy_state *p = userdata;
1208         size_t avail = p->request_buffer.len - p->pos;
1209
1210
1211         if (eltsize != 1)
1212                 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1213                     (uintmax_t)eltsize);
1214         max = nmemb;
1215
1216         if (!avail) {
1217                 if (p->seen_flush) {
1218                         p->seen_flush = 0;
1219                         return 0;
1220                 }
1221
1222                 strbuf_reset(&p->request_buffer);
1223                 switch (packet_reader_read(&p->reader)) {
1224                 case PACKET_READ_EOF:
1225                         die("unexpected EOF when reading from parent process");
1226                 case PACKET_READ_NORMAL:
1227                         packet_buf_write_len(&p->request_buffer, p->reader.line,
1228                                              p->reader.pktlen);
1229                         break;
1230                 case PACKET_READ_DELIM:
1231                         packet_buf_delim(&p->request_buffer);
1232                         break;
1233                 case PACKET_READ_FLUSH:
1234                         packet_buf_flush(&p->request_buffer);
1235                         p->seen_flush = 1;
1236                         break;
1237                 }
1238                 p->pos = 0;
1239                 avail = p->request_buffer.len;
1240         }
1241
1242         if (max < avail)
1243                 avail = max;
1244         memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1245         p->pos += avail;
1246         return avail;
1247 }
1248
1249 static size_t proxy_out(char *buffer, size_t eltsize,
1250                         size_t nmemb, void *userdata)
1251 {
1252         size_t size;
1253         struct proxy_state *p = userdata;
1254
1255         if (eltsize != 1)
1256                 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1257                     (uintmax_t)eltsize);
1258         size = nmemb;
1259
1260         write_or_die(p->out, buffer, size);
1261         return size;
1262 }
1263
1264 /* Issues a request to the HTTP server configured in `p` */
1265 static int proxy_request(struct proxy_state *p)
1266 {
1267         struct active_request_slot *slot;
1268
1269         slot = get_active_slot();
1270
1271         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1272         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1273         curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1274         curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1275         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1276
1277         /* Setup function to read request from client */
1278         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1279         curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1280
1281         /* Setup function to write server response to client */
1282         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1283         curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1284
1285         if (run_slot(slot, NULL) != HTTP_OK)
1286                 return -1;
1287
1288         return 0;
1289 }
1290
1291 static int stateless_connect(const char *service_name)
1292 {
1293         struct discovery *discover;
1294         struct proxy_state p;
1295
1296         /*
1297          * Run the info/refs request and see if the server supports protocol
1298          * v2.  If and only if the server supports v2 can we successfully
1299          * establish a stateless connection, otherwise we need to tell the
1300          * client to fallback to using other transport helper functions to
1301          * complete their request.
1302          */
1303         discover = discover_refs(service_name, 0);
1304         if (discover->version != protocol_v2) {
1305                 printf("fallback\n");
1306                 fflush(stdout);
1307                 return -1;
1308         } else {
1309                 /* Stateless Connection established */
1310                 printf("\n");
1311                 fflush(stdout);
1312         }
1313
1314         proxy_state_init(&p, service_name, discover->version);
1315
1316         /*
1317          * Dump the capability listing that we got from the server earlier
1318          * during the info/refs request.
1319          */
1320         write_or_die(p.out, discover->buf, discover->len);
1321
1322         /* Peek the next packet line.  Until we see EOF keep sending POSTs */
1323         while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1324                 if (proxy_request(&p)) {
1325                         /* We would have an err here */
1326                         break;
1327                 }
1328         }
1329
1330         proxy_state_clear(&p);
1331         return 0;
1332 }
1333
1334 int cmd_main(int argc, const char **argv)
1335 {
1336         struct strbuf buf = STRBUF_INIT;
1337         int nongit;
1338
1339         setup_git_directory_gently(&nongit);
1340         if (argc < 2) {
1341                 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1342                 return 1;
1343         }
1344
1345         options.verbosity = 1;
1346         options.progress = !!isatty(2);
1347         options.thin = 1;
1348         string_list_init(&options.deepen_not, 1);
1349         string_list_init(&options.push_options, 1);
1350
1351         remote = remote_get(argv[1]);
1352
1353         if (argc > 2) {
1354                 end_url_with_slash(&url, argv[2]);
1355         } else {
1356                 end_url_with_slash(&url, remote->url[0]);
1357         }
1358
1359         http_init(remote, url.buf, 0);
1360
1361         do {
1362                 const char *arg;
1363
1364                 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1365                         if (ferror(stdin))
1366                                 error("remote-curl: error reading command stream from git");
1367                         return 1;
1368                 }
1369                 if (buf.len == 0)
1370                         break;
1371                 if (starts_with(buf.buf, "fetch ")) {
1372                         if (nongit)
1373                                 die("remote-curl: fetch attempted without a local repo");
1374                         parse_fetch(&buf);
1375
1376                 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1377                         int for_push = !!strstr(buf.buf + 4, "for-push");
1378                         output_refs(get_refs(for_push));
1379
1380                 } else if (starts_with(buf.buf, "push ")) {
1381                         parse_push(&buf);
1382
1383                 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1384                         char *value = strchr(arg, ' ');
1385                         int result;
1386
1387                         if (value)
1388                                 *value++ = '\0';
1389                         else
1390                                 value = "true";
1391
1392                         result = set_option(arg, value);
1393                         if (!result)
1394                                 printf("ok\n");
1395                         else if (result < 0)
1396                                 printf("error invalid value\n");
1397                         else
1398                                 printf("unsupported\n");
1399                         fflush(stdout);
1400
1401                 } else if (!strcmp(buf.buf, "capabilities")) {
1402                         printf("stateless-connect\n");
1403                         printf("fetch\n");
1404                         printf("option\n");
1405                         printf("push\n");
1406                         printf("check-connectivity\n");
1407                         printf("\n");
1408                         fflush(stdout);
1409                 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1410                         if (!stateless_connect(arg))
1411                                 break;
1412                 } else {
1413                         error("remote-curl: unknown command '%s' from git", buf.buf);
1414                         return 1;
1415                 }
1416                 strbuf_reset(&buf);
1417         } while (1);
1418
1419         http_cleanup();
1420
1421         return 0;
1422 }