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