Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit remote-curl: reduce scope of rpc_state.argv (7d50d34)
   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
  20static struct remote *remote;
  21/* always ends with a trailing slash */
  22static struct strbuf url = STRBUF_INIT;
  23
  24struct 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};
  44static struct options options;
  45static struct string_list cas_options = STRING_LIST_INIT_DUP;
  46
  47static 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
 188struct 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};
 198static struct discovery *last_discovery;
 199
 200static 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                           PACKET_READ_DIE_ON_ERR_PACKET);
 209
 210        heads->version = discover_version(&reader);
 211        switch (heads->version) {
 212        case protocol_v2:
 213                /*
 214                 * Do nothing.  This isn't a list of refs but rather a
 215                 * capability advertisement.  Client would have run
 216                 * 'stateless-connect' so we'll dump this capability listing
 217                 * and let them request the refs themselves.
 218                 */
 219                break;
 220        case protocol_v1:
 221        case protocol_v0:
 222                get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
 223                                 NULL, &heads->shallow);
 224                break;
 225        case protocol_unknown_version:
 226                BUG("unknown protocol version");
 227        }
 228
 229        return list;
 230}
 231
 232static struct ref *parse_info_refs(struct discovery *heads)
 233{
 234        char *data, *start, *mid;
 235        char *ref_name;
 236        int i = 0;
 237
 238        struct ref *refs = NULL;
 239        struct ref *ref = NULL;
 240        struct ref *last_ref = NULL;
 241
 242        data = heads->buf;
 243        start = NULL;
 244        mid = data;
 245        while (i < heads->len) {
 246                if (!start) {
 247                        start = &data[i];
 248                }
 249                if (data[i] == '\t')
 250                        mid = &data[i];
 251                if (data[i] == '\n') {
 252                        if (mid - start != 40)
 253                                die("%sinfo/refs not valid: is this a git repository?",
 254                                    url.buf);
 255                        data[i] = 0;
 256                        ref_name = mid + 1;
 257                        ref = alloc_ref(ref_name);
 258                        get_oid_hex(start, &ref->old_oid);
 259                        if (!refs)
 260                                refs = ref;
 261                        if (last_ref)
 262                                last_ref->next = ref;
 263                        last_ref = ref;
 264                        start = NULL;
 265                }
 266                i++;
 267        }
 268
 269        ref = alloc_ref("HEAD");
 270        if (!http_fetch_ref(url.buf, ref) &&
 271            !resolve_remote_symref(ref, refs)) {
 272                ref->next = refs;
 273                refs = ref;
 274        } else {
 275                free(ref);
 276        }
 277
 278        return refs;
 279}
 280
 281static void free_discovery(struct discovery *d)
 282{
 283        if (d) {
 284                if (d == last_discovery)
 285                        last_discovery = NULL;
 286                free(d->shallow.oid);
 287                free(d->buf_alloc);
 288                free_refs(d->refs);
 289                free(d->service);
 290                free(d);
 291        }
 292}
 293
 294static int show_http_message(struct strbuf *type, struct strbuf *charset,
 295                             struct strbuf *msg)
 296{
 297        const char *p, *eol;
 298
 299        /*
 300         * We only show text/plain parts, as other types are likely
 301         * to be ugly to look at on the user's terminal.
 302         */
 303        if (strcmp(type->buf, "text/plain"))
 304                return -1;
 305        if (charset->len)
 306                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 307
 308        strbuf_trim(msg);
 309        if (!msg->len)
 310                return -1;
 311
 312        p = msg->buf;
 313        do {
 314                eol = strchrnul(p, '\n');
 315                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 316                p = eol + 1;
 317        } while(*eol);
 318        return 0;
 319}
 320
 321static int get_protocol_http_header(enum protocol_version version,
 322                                    struct strbuf *header)
 323{
 324        if (version > 0) {
 325                strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
 326                            version);
 327
 328                return 1;
 329        }
 330
 331        return 0;
 332}
 333
 334static void check_smart_http(struct discovery *d, const char *service,
 335                             struct strbuf *type)
 336{
 337        const char *p;
 338        struct packet_reader reader;
 339
 340        /*
 341         * If we don't see x-$service-advertisement, then it's not smart-http.
 342         * But once we do, we commit to it and assume any other protocol
 343         * violations are hard errors.
 344         */
 345        if (!skip_prefix(type->buf, "application/x-", &p) ||
 346            !skip_prefix(p, service, &p) ||
 347            strcmp(p, "-advertisement"))
 348                return;
 349
 350        packet_reader_init(&reader, -1, d->buf, d->len,
 351                           PACKET_READ_CHOMP_NEWLINE |
 352                           PACKET_READ_DIE_ON_ERR_PACKET);
 353        if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
 354                die("invalid server response; expected service, got flush packet");
 355
 356        if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
 357                /*
 358                 * The header can include additional metadata lines, up
 359                 * until a packet flush marker.  Ignore these now, but
 360                 * in the future we might start to scan them.
 361                 */
 362                for (;;) {
 363                        packet_reader_read(&reader);
 364                        if (reader.pktlen <= 0) {
 365                                break;
 366                        }
 367                }
 368
 369                /*
 370                 * v0 smart http; callers expect us to soak up the
 371                 * service and header packets
 372                 */
 373                d->buf = reader.src_buffer;
 374                d->len = reader.src_len;
 375                d->proto_git = 1;
 376
 377        } else if (!strcmp(reader.line, "version 2")) {
 378                /*
 379                 * v2 smart http; do not consume version packet, which will
 380                 * be handled elsewhere.
 381                 */
 382                d->proto_git = 1;
 383
 384        } else {
 385                die("invalid server response; got '%s'", reader.line);
 386        }
 387}
 388
 389static struct discovery *discover_refs(const char *service, int for_push)
 390{
 391        struct strbuf type = STRBUF_INIT;
 392        struct strbuf charset = STRBUF_INIT;
 393        struct strbuf buffer = STRBUF_INIT;
 394        struct strbuf refs_url = STRBUF_INIT;
 395        struct strbuf effective_url = STRBUF_INIT;
 396        struct strbuf protocol_header = STRBUF_INIT;
 397        struct string_list extra_headers = STRING_LIST_INIT_DUP;
 398        struct discovery *last = last_discovery;
 399        int http_ret, maybe_smart = 0;
 400        struct http_get_options http_options;
 401        enum protocol_version version = get_protocol_version_config();
 402
 403        if (last && !strcmp(service, last->service))
 404                return last;
 405        free_discovery(last);
 406
 407        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 408        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 409             git_env_bool("GIT_SMART_HTTP", 1)) {
 410                maybe_smart = 1;
 411                if (!strchr(url.buf, '?'))
 412                        strbuf_addch(&refs_url, '?');
 413                else
 414                        strbuf_addch(&refs_url, '&');
 415                strbuf_addf(&refs_url, "service=%s", service);
 416        }
 417
 418        /*
 419         * NEEDSWORK: If we are trying to use protocol v2 and we are planning
 420         * to perform a push, then fallback to v0 since the client doesn't know
 421         * how to push yet using v2.
 422         */
 423        if (version == protocol_v2 && !strcmp("git-receive-pack", service))
 424                version = protocol_v0;
 425
 426        /* Add the extra Git-Protocol header */
 427        if (get_protocol_http_header(version, &protocol_header))
 428                string_list_append(&extra_headers, protocol_header.buf);
 429
 430        memset(&http_options, 0, sizeof(http_options));
 431        http_options.content_type = &type;
 432        http_options.charset = &charset;
 433        http_options.effective_url = &effective_url;
 434        http_options.base_url = &url;
 435        http_options.extra_headers = &extra_headers;
 436        http_options.initial_request = 1;
 437        http_options.no_cache = 1;
 438
 439        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 440        switch (http_ret) {
 441        case HTTP_OK:
 442                break;
 443        case HTTP_MISSING_TARGET:
 444                show_http_message(&type, &charset, &buffer);
 445                die("repository '%s' not found", url.buf);
 446        case HTTP_NOAUTH:
 447                show_http_message(&type, &charset, &buffer);
 448                die("Authentication failed for '%s'", url.buf);
 449        default:
 450                show_http_message(&type, &charset, &buffer);
 451                die("unable to access '%s': %s", url.buf, curl_errorstr);
 452        }
 453
 454        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 455                warning(_("redirecting to %s"), url.buf);
 456
 457        last= xcalloc(1, sizeof(*last_discovery));
 458        last->service = xstrdup(service);
 459        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 460        last->buf = last->buf_alloc;
 461
 462        if (maybe_smart)
 463                check_smart_http(last, service, &type);
 464
 465        if (last->proto_git)
 466                last->refs = parse_git_refs(last, for_push);
 467        else
 468                last->refs = parse_info_refs(last);
 469
 470        strbuf_release(&refs_url);
 471        strbuf_release(&type);
 472        strbuf_release(&charset);
 473        strbuf_release(&effective_url);
 474        strbuf_release(&buffer);
 475        strbuf_release(&protocol_header);
 476        string_list_clear(&extra_headers, 0);
 477        last_discovery = last;
 478        return last;
 479}
 480
 481static struct ref *get_refs(int for_push)
 482{
 483        struct discovery *heads;
 484
 485        if (for_push)
 486                heads = discover_refs("git-receive-pack", for_push);
 487        else
 488                heads = discover_refs("git-upload-pack", for_push);
 489
 490        return heads->refs;
 491}
 492
 493static void output_refs(struct ref *refs)
 494{
 495        struct ref *posn;
 496        for (posn = refs; posn; posn = posn->next) {
 497                if (posn->symref)
 498                        printf("@%s %s\n", posn->symref, posn->name);
 499                else
 500                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 501        }
 502        printf("\n");
 503        fflush(stdout);
 504}
 505
 506struct rpc_state {
 507        const char *service_name;
 508        struct strbuf *stdin_preamble;
 509        char *service_url;
 510        char *hdr_content_type;
 511        char *hdr_accept;
 512        char *protocol_header;
 513        char *buf;
 514        size_t alloc;
 515        size_t len;
 516        size_t pos;
 517        int in;
 518        int out;
 519        int any_written;
 520        struct strbuf result;
 521        unsigned gzip_request : 1;
 522        unsigned initial_buffer : 1;
 523};
 524
 525static size_t rpc_out(void *ptr, size_t eltsize,
 526                size_t nmemb, void *buffer_)
 527{
 528        size_t max = eltsize * nmemb;
 529        struct rpc_state *rpc = buffer_;
 530        size_t avail = rpc->len - rpc->pos;
 531
 532        if (!avail) {
 533                rpc->initial_buffer = 0;
 534                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 535                if (!avail)
 536                        return 0;
 537                rpc->pos = 0;
 538                rpc->len = avail;
 539        }
 540
 541        if (max < avail)
 542                avail = max;
 543        memcpy(ptr, rpc->buf + rpc->pos, avail);
 544        rpc->pos += avail;
 545        return avail;
 546}
 547
 548#ifndef NO_CURL_IOCTL
 549static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 550{
 551        struct rpc_state *rpc = clientp;
 552
 553        switch (cmd) {
 554        case CURLIOCMD_NOP:
 555                return CURLIOE_OK;
 556
 557        case CURLIOCMD_RESTARTREAD:
 558                if (rpc->initial_buffer) {
 559                        rpc->pos = 0;
 560                        return CURLIOE_OK;
 561                }
 562                error("unable to rewind rpc post data - try increasing http.postBuffer");
 563                return CURLIOE_FAILRESTART;
 564
 565        default:
 566                return CURLIOE_UNKNOWNCMD;
 567        }
 568}
 569#endif
 570
 571struct rpc_in_data {
 572        struct rpc_state *rpc;
 573        struct active_request_slot *slot;
 574};
 575
 576/*
 577 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
 578 * from ptr.
 579 */
 580static size_t rpc_in(char *ptr, size_t eltsize,
 581                size_t nmemb, void *buffer_)
 582{
 583        size_t size = eltsize * nmemb;
 584        struct rpc_in_data *data = buffer_;
 585        long response_code;
 586
 587        if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
 588                              &response_code) != CURLE_OK)
 589                return size;
 590        if (response_code >= 300)
 591                return size;
 592        if (size)
 593                data->rpc->any_written = 1;
 594        write_or_die(data->rpc->in, ptr, size);
 595        return size;
 596}
 597
 598static int run_slot(struct active_request_slot *slot,
 599                    struct slot_results *results)
 600{
 601        int err;
 602        struct slot_results results_buf;
 603
 604        if (!results)
 605                results = &results_buf;
 606
 607        err = run_one_slot(slot, results);
 608
 609        if (err != HTTP_OK && err != HTTP_REAUTH) {
 610                struct strbuf msg = STRBUF_INIT;
 611                if (results->http_code && results->http_code != 200)
 612                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 613                if (results->curl_result != CURLE_OK) {
 614                        if (msg.len)
 615                                strbuf_addch(&msg, ' ');
 616                        strbuf_addf(&msg, "curl %d", results->curl_result);
 617                        if (curl_errorstr[0]) {
 618                                strbuf_addch(&msg, ' ');
 619                                strbuf_addstr(&msg, curl_errorstr);
 620                        }
 621                }
 622                error("RPC failed; %s", msg.buf);
 623                strbuf_release(&msg);
 624        }
 625
 626        return err;
 627}
 628
 629static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 630{
 631        struct active_request_slot *slot;
 632        struct curl_slist *headers = http_copy_default_headers();
 633        struct strbuf buf = STRBUF_INIT;
 634        int err;
 635
 636        slot = get_active_slot();
 637
 638        headers = curl_slist_append(headers, rpc->hdr_content_type);
 639        headers = curl_slist_append(headers, rpc->hdr_accept);
 640
 641        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 642        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 643        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 644        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 645        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 646        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 647        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 648        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 649        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 650
 651        err = run_slot(slot, results);
 652
 653        curl_slist_free_all(headers);
 654        strbuf_release(&buf);
 655        return err;
 656}
 657
 658static curl_off_t xcurl_off_t(size_t len)
 659{
 660        uintmax_t size = len;
 661        if (size > maximum_signed_value_of_type(curl_off_t))
 662                die("cannot handle pushes this big");
 663        return (curl_off_t)size;
 664}
 665
 666static int post_rpc(struct rpc_state *rpc)
 667{
 668        struct active_request_slot *slot;
 669        struct curl_slist *headers = http_copy_default_headers();
 670        int use_gzip = rpc->gzip_request;
 671        char *gzip_body = NULL;
 672        size_t gzip_size = 0;
 673        int err, large_request = 0;
 674        int needs_100_continue = 0;
 675        struct rpc_in_data rpc_in_data;
 676
 677        /* Try to load the entire request, if we can fit it into the
 678         * allocated buffer space we can use HTTP/1.0 and avoid the
 679         * chunked encoding mess.
 680         */
 681        while (1) {
 682                size_t left = rpc->alloc - rpc->len;
 683                char *buf = rpc->buf + rpc->len;
 684                int n;
 685
 686                if (left < LARGE_PACKET_MAX) {
 687                        large_request = 1;
 688                        use_gzip = 0;
 689                        break;
 690                }
 691
 692                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 693                if (!n)
 694                        break;
 695                rpc->len += n;
 696        }
 697
 698        if (large_request) {
 699                struct slot_results results;
 700
 701                do {
 702                        err = probe_rpc(rpc, &results);
 703                        if (err == HTTP_REAUTH)
 704                                credential_fill(&http_auth);
 705                } while (err == HTTP_REAUTH);
 706                if (err != HTTP_OK)
 707                        return -1;
 708
 709                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 710                        needs_100_continue = 1;
 711        }
 712
 713        headers = curl_slist_append(headers, rpc->hdr_content_type);
 714        headers = curl_slist_append(headers, rpc->hdr_accept);
 715        headers = curl_slist_append(headers, needs_100_continue ?
 716                "Expect: 100-continue" : "Expect:");
 717
 718        /* Add the extra Git-Protocol header */
 719        if (rpc->protocol_header)
 720                headers = curl_slist_append(headers, rpc->protocol_header);
 721
 722retry:
 723        slot = get_active_slot();
 724
 725        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 726        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 727        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 728        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
 729
 730        if (large_request) {
 731                /* The request body is large and the size cannot be predicted.
 732                 * We must use chunked encoding to send it.
 733                 */
 734                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 735                rpc->initial_buffer = 1;
 736                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 737                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 738#ifndef NO_CURL_IOCTL
 739                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 740                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 741#endif
 742                if (options.verbosity > 1) {
 743                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 744                        fflush(stderr);
 745                }
 746
 747        } else if (gzip_body) {
 748                /*
 749                 * If we are looping to retry authentication, then the previous
 750                 * run will have set up the headers and gzip buffer already,
 751                 * and we just need to send it.
 752                 */
 753                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 754                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 755
 756        } else if (use_gzip && 1024 < rpc->len) {
 757                /* The client backend isn't giving us compressed data so
 758                 * we can try to deflate it ourselves, this may save on
 759                 * the transfer time.
 760                 */
 761                git_zstream stream;
 762                int ret;
 763
 764                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 765                gzip_size = git_deflate_bound(&stream, rpc->len);
 766                gzip_body = xmalloc(gzip_size);
 767
 768                stream.next_in = (unsigned char *)rpc->buf;
 769                stream.avail_in = rpc->len;
 770                stream.next_out = (unsigned char *)gzip_body;
 771                stream.avail_out = gzip_size;
 772
 773                ret = git_deflate(&stream, Z_FINISH);
 774                if (ret != Z_STREAM_END)
 775                        die("cannot deflate request; zlib deflate error %d", ret);
 776
 777                ret = git_deflate_end_gently(&stream);
 778                if (ret != Z_OK)
 779                        die("cannot deflate request; zlib end error %d", ret);
 780
 781                gzip_size = stream.total_out;
 782
 783                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 784                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 785                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 786
 787                if (options.verbosity > 1) {
 788                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 789                                rpc->service_name,
 790                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 791                        fflush(stderr);
 792                }
 793        } else {
 794                /* We know the complete request size in advance, use the
 795                 * more normal Content-Length approach.
 796                 */
 797                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 798                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 799                if (options.verbosity > 1) {
 800                        fprintf(stderr, "POST %s (%lu bytes)\n",
 801                                rpc->service_name, (unsigned long)rpc->len);
 802                        fflush(stderr);
 803                }
 804        }
 805
 806        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 807        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 808        rpc_in_data.rpc = rpc;
 809        rpc_in_data.slot = slot;
 810        curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
 811        curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
 812
 813
 814        rpc->any_written = 0;
 815        err = run_slot(slot, NULL);
 816        if (err == HTTP_REAUTH && !large_request) {
 817                credential_fill(&http_auth);
 818                goto retry;
 819        }
 820        if (err != HTTP_OK)
 821                err = -1;
 822
 823        if (!rpc->any_written)
 824                err = -1;
 825
 826        curl_slist_free_all(headers);
 827        free(gzip_body);
 828        return err;
 829}
 830
 831static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
 832                       const char **client_argv)
 833{
 834        const char *svc = rpc->service_name;
 835        struct strbuf buf = STRBUF_INIT;
 836        struct strbuf *preamble = rpc->stdin_preamble;
 837        struct child_process client = CHILD_PROCESS_INIT;
 838        int err = 0;
 839
 840        client.in = -1;
 841        client.out = -1;
 842        client.git_cmd = 1;
 843        client.argv = client_argv;
 844        if (start_command(&client))
 845                exit(1);
 846        if (preamble)
 847                write_or_die(client.in, preamble->buf, preamble->len);
 848        if (heads)
 849                write_or_die(client.in, heads->buf, heads->len);
 850
 851        rpc->alloc = http_post_buffer;
 852        rpc->buf = xmalloc(rpc->alloc);
 853        rpc->in = client.in;
 854        rpc->out = client.out;
 855        strbuf_init(&rpc->result, 0);
 856
 857        strbuf_addf(&buf, "%s%s", url.buf, svc);
 858        rpc->service_url = strbuf_detach(&buf, NULL);
 859
 860        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 861        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 862
 863        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 864        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 865
 866        if (get_protocol_http_header(heads->version, &buf))
 867                rpc->protocol_header = strbuf_detach(&buf, NULL);
 868        else
 869                rpc->protocol_header = NULL;
 870
 871        while (!err) {
 872                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 873                if (!n)
 874                        break;
 875                rpc->pos = 0;
 876                rpc->len = n;
 877                err |= post_rpc(rpc);
 878        }
 879
 880        close(client.in);
 881        client.in = -1;
 882        if (!err) {
 883                strbuf_read(&rpc->result, client.out, 0);
 884        } else {
 885                char buf[4096];
 886                for (;;)
 887                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 888                                break;
 889        }
 890
 891        close(client.out);
 892        client.out = -1;
 893
 894        err |= finish_command(&client);
 895        free(rpc->service_url);
 896        free(rpc->hdr_content_type);
 897        free(rpc->hdr_accept);
 898        free(rpc->protocol_header);
 899        free(rpc->buf);
 900        strbuf_release(&buf);
 901        return err;
 902}
 903
 904static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 905{
 906        struct walker *walker;
 907        char **targets;
 908        int ret, i;
 909
 910        ALLOC_ARRAY(targets, nr_heads);
 911        if (options.depth || options.deepen_since)
 912                die("dumb http transport does not support shallow capabilities");
 913        for (i = 0; i < nr_heads; i++)
 914                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 915
 916        walker = get_http_walker(url.buf);
 917        walker->get_verbosely = options.verbosity >= 3;
 918        walker->get_recover = 0;
 919        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 920        walker_free(walker);
 921
 922        for (i = 0; i < nr_heads; i++)
 923                free(targets[i]);
 924        free(targets);
 925
 926        return ret ? error("fetch failed.") : 0;
 927}
 928
 929static int fetch_git(struct discovery *heads,
 930        int nr_heads, struct ref **to_fetch)
 931{
 932        struct rpc_state rpc;
 933        struct strbuf preamble = STRBUF_INIT;
 934        int i, err;
 935        struct argv_array args = ARGV_ARRAY_INIT;
 936
 937        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 938                         "--stdin", "--lock-pack", NULL);
 939        if (options.followtags)
 940                argv_array_push(&args, "--include-tag");
 941        if (options.thin)
 942                argv_array_push(&args, "--thin");
 943        if (options.verbosity >= 3)
 944                argv_array_pushl(&args, "-v", "-v", NULL);
 945        if (options.check_self_contained_and_connected)
 946                argv_array_push(&args, "--check-self-contained-and-connected");
 947        if (options.cloning)
 948                argv_array_push(&args, "--cloning");
 949        if (options.update_shallow)
 950                argv_array_push(&args, "--update-shallow");
 951        if (!options.progress)
 952                argv_array_push(&args, "--no-progress");
 953        if (options.depth)
 954                argv_array_pushf(&args, "--depth=%lu", options.depth);
 955        if (options.deepen_since)
 956                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 957        for (i = 0; i < options.deepen_not.nr; i++)
 958                argv_array_pushf(&args, "--shallow-exclude=%s",
 959                                 options.deepen_not.items[i].string);
 960        if (options.deepen_relative && options.depth)
 961                argv_array_push(&args, "--deepen-relative");
 962        if (options.from_promisor)
 963                argv_array_push(&args, "--from-promisor");
 964        if (options.no_dependents)
 965                argv_array_push(&args, "--no-dependents");
 966        if (options.filter)
 967                argv_array_pushf(&args, "--filter=%s", options.filter);
 968        argv_array_push(&args, url.buf);
 969
 970        for (i = 0; i < nr_heads; i++) {
 971                struct ref *ref = to_fetch[i];
 972                if (!*ref->name)
 973                        die("cannot fetch by sha1 over smart http");
 974                packet_buf_write(&preamble, "%s %s\n",
 975                                 oid_to_hex(&ref->old_oid), ref->name);
 976        }
 977        packet_buf_flush(&preamble);
 978
 979        memset(&rpc, 0, sizeof(rpc));
 980        rpc.service_name = "git-upload-pack",
 981        rpc.stdin_preamble = &preamble;
 982        rpc.gzip_request = 1;
 983
 984        err = rpc_service(&rpc, heads, args.argv);
 985        if (rpc.result.len)
 986                write_or_die(1, rpc.result.buf, rpc.result.len);
 987        strbuf_release(&rpc.result);
 988        strbuf_release(&preamble);
 989        argv_array_clear(&args);
 990        return err;
 991}
 992
 993static int fetch(int nr_heads, struct ref **to_fetch)
 994{
 995        struct discovery *d = discover_refs("git-upload-pack", 0);
 996        if (d->proto_git)
 997                return fetch_git(d, nr_heads, to_fetch);
 998        else
 999                return fetch_dumb(nr_heads, to_fetch);
1000}
1001
1002static void parse_fetch(struct strbuf *buf)
1003{
1004        struct ref **to_fetch = NULL;
1005        struct ref *list_head = NULL;
1006        struct ref **list = &list_head;
1007        int alloc_heads = 0, nr_heads = 0;
1008
1009        do {
1010                const char *p;
1011                if (skip_prefix(buf->buf, "fetch ", &p)) {
1012                        const char *name;
1013                        struct ref *ref;
1014                        struct object_id old_oid;
1015
1016                        if (get_oid_hex(p, &old_oid))
1017                                die("protocol error: expected sha/ref, got %s'", p);
1018                        if (p[GIT_SHA1_HEXSZ] == ' ')
1019                                name = p + GIT_SHA1_HEXSZ + 1;
1020                        else if (!p[GIT_SHA1_HEXSZ])
1021                                name = "";
1022                        else
1023                                die("protocol error: expected sha/ref, got %s'", p);
1024
1025                        ref = alloc_ref(name);
1026                        oidcpy(&ref->old_oid, &old_oid);
1027
1028                        *list = ref;
1029                        list = &ref->next;
1030
1031                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1032                        to_fetch[nr_heads++] = ref;
1033                }
1034                else
1035                        die("http transport does not support %s", buf->buf);
1036
1037                strbuf_reset(buf);
1038                if (strbuf_getline_lf(buf, stdin) == EOF)
1039                        return;
1040                if (!*buf->buf)
1041                        break;
1042        } while (1);
1043
1044        if (fetch(nr_heads, to_fetch))
1045                exit(128); /* error already reported */
1046        free_refs(list_head);
1047        free(to_fetch);
1048
1049        printf("\n");
1050        fflush(stdout);
1051        strbuf_reset(buf);
1052}
1053
1054static int push_dav(int nr_spec, char **specs)
1055{
1056        struct child_process child = CHILD_PROCESS_INIT;
1057        size_t i;
1058
1059        child.git_cmd = 1;
1060        argv_array_push(&child.args, "http-push");
1061        argv_array_push(&child.args, "--helper-status");
1062        if (options.dry_run)
1063                argv_array_push(&child.args, "--dry-run");
1064        if (options.verbosity > 1)
1065                argv_array_push(&child.args, "--verbose");
1066        argv_array_push(&child.args, url.buf);
1067        for (i = 0; i < nr_spec; i++)
1068                argv_array_push(&child.args, specs[i]);
1069
1070        if (run_command(&child))
1071                die("git-http-push failed");
1072        return 0;
1073}
1074
1075static int push_git(struct discovery *heads, int nr_spec, char **specs)
1076{
1077        struct rpc_state rpc;
1078        int i, err;
1079        struct argv_array args;
1080        struct string_list_item *cas_option;
1081        struct strbuf preamble = STRBUF_INIT;
1082
1083        argv_array_init(&args);
1084        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1085                         NULL);
1086
1087        if (options.thin)
1088                argv_array_push(&args, "--thin");
1089        if (options.dry_run)
1090                argv_array_push(&args, "--dry-run");
1091        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1092                argv_array_push(&args, "--signed=yes");
1093        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1094                argv_array_push(&args, "--signed=if-asked");
1095        if (options.verbosity == 0)
1096                argv_array_push(&args, "--quiet");
1097        else if (options.verbosity > 1)
1098                argv_array_push(&args, "--verbose");
1099        for (i = 0; i < options.push_options.nr; i++)
1100                argv_array_pushf(&args, "--push-option=%s",
1101                                 options.push_options.items[i].string);
1102        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1103        for_each_string_list_item(cas_option, &cas_options)
1104                argv_array_push(&args, cas_option->string);
1105        argv_array_push(&args, url.buf);
1106
1107        argv_array_push(&args, "--stdin");
1108        for (i = 0; i < nr_spec; i++)
1109                packet_buf_write(&preamble, "%s\n", specs[i]);
1110        packet_buf_flush(&preamble);
1111
1112        memset(&rpc, 0, sizeof(rpc));
1113        rpc.service_name = "git-receive-pack",
1114        rpc.stdin_preamble = &preamble;
1115
1116        err = rpc_service(&rpc, heads, args.argv);
1117        if (rpc.result.len)
1118                write_or_die(1, rpc.result.buf, rpc.result.len);
1119        strbuf_release(&rpc.result);
1120        strbuf_release(&preamble);
1121        argv_array_clear(&args);
1122        return err;
1123}
1124
1125static int push(int nr_spec, char **specs)
1126{
1127        struct discovery *heads = discover_refs("git-receive-pack", 1);
1128        int ret;
1129
1130        if (heads->proto_git)
1131                ret = push_git(heads, nr_spec, specs);
1132        else
1133                ret = push_dav(nr_spec, specs);
1134        free_discovery(heads);
1135        return ret;
1136}
1137
1138static void parse_push(struct strbuf *buf)
1139{
1140        char **specs = NULL;
1141        int alloc_spec = 0, nr_spec = 0, i, ret;
1142
1143        do {
1144                if (starts_with(buf->buf, "push ")) {
1145                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1146                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1147                }
1148                else
1149                        die("http transport does not support %s", buf->buf);
1150
1151                strbuf_reset(buf);
1152                if (strbuf_getline_lf(buf, stdin) == EOF)
1153                        goto free_specs;
1154                if (!*buf->buf)
1155                        break;
1156        } while (1);
1157
1158        ret = push(nr_spec, specs);
1159        printf("\n");
1160        fflush(stdout);
1161
1162        if (ret)
1163                exit(128); /* error already reported */
1164
1165 free_specs:
1166        for (i = 0; i < nr_spec; i++)
1167                free(specs[i]);
1168        free(specs);
1169}
1170
1171/*
1172 * Used to represent the state of a connection to an HTTP server when
1173 * communicating using git's wire-protocol version 2.
1174 */
1175struct proxy_state {
1176        char *service_name;
1177        char *service_url;
1178        struct curl_slist *headers;
1179        struct strbuf request_buffer;
1180        int in;
1181        int out;
1182        struct packet_reader reader;
1183        size_t pos;
1184        int seen_flush;
1185};
1186
1187static void proxy_state_init(struct proxy_state *p, const char *service_name,
1188                             enum protocol_version version)
1189{
1190        struct strbuf buf = STRBUF_INIT;
1191
1192        memset(p, 0, sizeof(*p));
1193        p->service_name = xstrdup(service_name);
1194
1195        p->in = 0;
1196        p->out = 1;
1197        strbuf_init(&p->request_buffer, 0);
1198
1199        strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1200        p->service_url = strbuf_detach(&buf, NULL);
1201
1202        p->headers = http_copy_default_headers();
1203
1204        strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1205        p->headers = curl_slist_append(p->headers, buf.buf);
1206        strbuf_reset(&buf);
1207
1208        strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1209        p->headers = curl_slist_append(p->headers, buf.buf);
1210        strbuf_reset(&buf);
1211
1212        p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1213
1214        /* Add the Git-Protocol header */
1215        if (get_protocol_http_header(version, &buf))
1216                p->headers = curl_slist_append(p->headers, buf.buf);
1217
1218        packet_reader_init(&p->reader, p->in, NULL, 0,
1219                           PACKET_READ_GENTLE_ON_EOF |
1220                           PACKET_READ_DIE_ON_ERR_PACKET);
1221
1222        strbuf_release(&buf);
1223}
1224
1225static void proxy_state_clear(struct proxy_state *p)
1226{
1227        free(p->service_name);
1228        free(p->service_url);
1229        curl_slist_free_all(p->headers);
1230        strbuf_release(&p->request_buffer);
1231}
1232
1233/*
1234 * CURLOPT_READFUNCTION callback function.
1235 * Attempts to copy over a single packet-line at a time into the
1236 * curl provided buffer.
1237 */
1238static size_t proxy_in(char *buffer, size_t eltsize,
1239                       size_t nmemb, void *userdata)
1240{
1241        size_t max;
1242        struct proxy_state *p = userdata;
1243        size_t avail = p->request_buffer.len - p->pos;
1244
1245
1246        if (eltsize != 1)
1247                BUG("curl read callback called with size = %"PRIuMAX" != 1",
1248                    (uintmax_t)eltsize);
1249        max = nmemb;
1250
1251        if (!avail) {
1252                if (p->seen_flush) {
1253                        p->seen_flush = 0;
1254                        return 0;
1255                }
1256
1257                strbuf_reset(&p->request_buffer);
1258                switch (packet_reader_read(&p->reader)) {
1259                case PACKET_READ_EOF:
1260                        die("unexpected EOF when reading from parent process");
1261                case PACKET_READ_NORMAL:
1262                        packet_buf_write_len(&p->request_buffer, p->reader.line,
1263                                             p->reader.pktlen);
1264                        break;
1265                case PACKET_READ_DELIM:
1266                        packet_buf_delim(&p->request_buffer);
1267                        break;
1268                case PACKET_READ_FLUSH:
1269                        packet_buf_flush(&p->request_buffer);
1270                        p->seen_flush = 1;
1271                        break;
1272                }
1273                p->pos = 0;
1274                avail = p->request_buffer.len;
1275        }
1276
1277        if (max < avail)
1278                avail = max;
1279        memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1280        p->pos += avail;
1281        return avail;
1282}
1283
1284static size_t proxy_out(char *buffer, size_t eltsize,
1285                        size_t nmemb, void *userdata)
1286{
1287        size_t size;
1288        struct proxy_state *p = userdata;
1289
1290        if (eltsize != 1)
1291                BUG("curl read callback called with size = %"PRIuMAX" != 1",
1292                    (uintmax_t)eltsize);
1293        size = nmemb;
1294
1295        write_or_die(p->out, buffer, size);
1296        return size;
1297}
1298
1299/* Issues a request to the HTTP server configured in `p` */
1300static int proxy_request(struct proxy_state *p)
1301{
1302        struct active_request_slot *slot;
1303
1304        slot = get_active_slot();
1305
1306        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1307        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1308        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1309        curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1310        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1311
1312        /* Setup function to read request from client */
1313        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1314        curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1315
1316        /* Setup function to write server response to client */
1317        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1318        curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1319
1320        if (run_slot(slot, NULL) != HTTP_OK)
1321                return -1;
1322
1323        return 0;
1324}
1325
1326static int stateless_connect(const char *service_name)
1327{
1328        struct discovery *discover;
1329        struct proxy_state p;
1330
1331        /*
1332         * Run the info/refs request and see if the server supports protocol
1333         * v2.  If and only if the server supports v2 can we successfully
1334         * establish a stateless connection, otherwise we need to tell the
1335         * client to fallback to using other transport helper functions to
1336         * complete their request.
1337         */
1338        discover = discover_refs(service_name, 0);
1339        if (discover->version != protocol_v2) {
1340                printf("fallback\n");
1341                fflush(stdout);
1342                return -1;
1343        } else {
1344                /* Stateless Connection established */
1345                printf("\n");
1346                fflush(stdout);
1347        }
1348
1349        proxy_state_init(&p, service_name, discover->version);
1350
1351        /*
1352         * Dump the capability listing that we got from the server earlier
1353         * during the info/refs request.
1354         */
1355        write_or_die(p.out, discover->buf, discover->len);
1356
1357        /* Peek the next packet line.  Until we see EOF keep sending POSTs */
1358        while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1359                if (proxy_request(&p)) {
1360                        /* We would have an err here */
1361                        break;
1362                }
1363        }
1364
1365        proxy_state_clear(&p);
1366        return 0;
1367}
1368
1369int cmd_main(int argc, const char **argv)
1370{
1371        struct strbuf buf = STRBUF_INIT;
1372        int nongit;
1373
1374        setup_git_directory_gently(&nongit);
1375        if (argc < 2) {
1376                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1377                return 1;
1378        }
1379
1380        options.verbosity = 1;
1381        options.progress = !!isatty(2);
1382        options.thin = 1;
1383        string_list_init(&options.deepen_not, 1);
1384        string_list_init(&options.push_options, 1);
1385
1386        remote = remote_get(argv[1]);
1387
1388        if (argc > 2) {
1389                end_url_with_slash(&url, argv[2]);
1390        } else {
1391                end_url_with_slash(&url, remote->url[0]);
1392        }
1393
1394        http_init(remote, url.buf, 0);
1395
1396        do {
1397                const char *arg;
1398
1399                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1400                        if (ferror(stdin))
1401                                error("remote-curl: error reading command stream from git");
1402                        return 1;
1403                }
1404                if (buf.len == 0)
1405                        break;
1406                if (starts_with(buf.buf, "fetch ")) {
1407                        if (nongit)
1408                                die("remote-curl: fetch attempted without a local repo");
1409                        parse_fetch(&buf);
1410
1411                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1412                        int for_push = !!strstr(buf.buf + 4, "for-push");
1413                        output_refs(get_refs(for_push));
1414
1415                } else if (starts_with(buf.buf, "push ")) {
1416                        parse_push(&buf);
1417
1418                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1419                        char *value = strchr(arg, ' ');
1420                        int result;
1421
1422                        if (value)
1423                                *value++ = '\0';
1424                        else
1425                                value = "true";
1426
1427                        result = set_option(arg, value);
1428                        if (!result)
1429                                printf("ok\n");
1430                        else if (result < 0)
1431                                printf("error invalid value\n");
1432                        else
1433                                printf("unsupported\n");
1434                        fflush(stdout);
1435
1436                } else if (!strcmp(buf.buf, "capabilities")) {
1437                        printf("stateless-connect\n");
1438                        printf("fetch\n");
1439                        printf("option\n");
1440                        printf("push\n");
1441                        printf("check-connectivity\n");
1442                        printf("\n");
1443                        fflush(stdout);
1444                } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1445                        if (!stateless_connect(arg))
1446                                break;
1447                } else {
1448                        error("remote-curl: unknown command '%s' from git", buf.buf);
1449                        return 1;
1450                }
1451                strbuf_reset(&buf);
1452        } while (1);
1453
1454        http_cleanup();
1455
1456        return 0;
1457}