Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit http: allow providing extra headers for http requests (8ff14ed)
   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
  19static struct remote *remote;
  20/* always ends with a trailing slash */
  21static struct strbuf url = STRBUF_INIT;
  22
  23struct options {
  24        int verbosity;
  25        unsigned long depth;
  26        char *deepen_since;
  27        struct string_list deepen_not;
  28        struct string_list push_options;
  29        unsigned progress : 1,
  30                check_self_contained_and_connected : 1,
  31                cloning : 1,
  32                update_shallow : 1,
  33                followtags : 1,
  34                dry_run : 1,
  35                thin : 1,
  36                /* One of the SEND_PACK_PUSH_CERT_* constants. */
  37                push_cert : 2,
  38                deepen_relative : 1;
  39};
  40static struct options options;
  41static struct string_list cas_options = STRING_LIST_INIT_DUP;
  42
  43static int set_option(const char *name, const char *value)
  44{
  45        if (!strcmp(name, "verbosity")) {
  46                char *end;
  47                int v = strtol(value, &end, 10);
  48                if (value == end || *end)
  49                        return -1;
  50                options.verbosity = v;
  51                return 0;
  52        }
  53        else if (!strcmp(name, "progress")) {
  54                if (!strcmp(value, "true"))
  55                        options.progress = 1;
  56                else if (!strcmp(value, "false"))
  57                        options.progress = 0;
  58                else
  59                        return -1;
  60                return 0;
  61        }
  62        else if (!strcmp(name, "depth")) {
  63                char *end;
  64                unsigned long v = strtoul(value, &end, 10);
  65                if (value == end || *end)
  66                        return -1;
  67                options.depth = v;
  68                return 0;
  69        }
  70        else if (!strcmp(name, "deepen-since")) {
  71                options.deepen_since = xstrdup(value);
  72                return 0;
  73        }
  74        else if (!strcmp(name, "deepen-not")) {
  75                string_list_append(&options.deepen_not, value);
  76                return 0;
  77        }
  78        else if (!strcmp(name, "deepen-relative")) {
  79                if (!strcmp(value, "true"))
  80                        options.deepen_relative = 1;
  81                else if (!strcmp(value, "false"))
  82                        options.deepen_relative = 0;
  83                else
  84                        return -1;
  85                return 0;
  86        }
  87        else if (!strcmp(name, "followtags")) {
  88                if (!strcmp(value, "true"))
  89                        options.followtags = 1;
  90                else if (!strcmp(value, "false"))
  91                        options.followtags = 0;
  92                else
  93                        return -1;
  94                return 0;
  95        }
  96        else if (!strcmp(name, "dry-run")) {
  97                if (!strcmp(value, "true"))
  98                        options.dry_run = 1;
  99                else if (!strcmp(value, "false"))
 100                        options.dry_run = 0;
 101                else
 102                        return -1;
 103                return 0;
 104        }
 105        else if (!strcmp(name, "check-connectivity")) {
 106                if (!strcmp(value, "true"))
 107                        options.check_self_contained_and_connected = 1;
 108                else if (!strcmp(value, "false"))
 109                        options.check_self_contained_and_connected = 0;
 110                else
 111                        return -1;
 112                return 0;
 113        }
 114        else if (!strcmp(name, "cas")) {
 115                struct strbuf val = STRBUF_INIT;
 116                strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
 117                string_list_append(&cas_options, val.buf);
 118                strbuf_release(&val);
 119                return 0;
 120        } else if (!strcmp(name, "cloning")) {
 121                if (!strcmp(value, "true"))
 122                        options.cloning = 1;
 123                else if (!strcmp(value, "false"))
 124                        options.cloning = 0;
 125                else
 126                        return -1;
 127                return 0;
 128        } else if (!strcmp(name, "update-shallow")) {
 129                if (!strcmp(value, "true"))
 130                        options.update_shallow = 1;
 131                else if (!strcmp(value, "false"))
 132                        options.update_shallow = 0;
 133                else
 134                        return -1;
 135                return 0;
 136        } else if (!strcmp(name, "pushcert")) {
 137                if (!strcmp(value, "true"))
 138                        options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 139                else if (!strcmp(value, "false"))
 140                        options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 141                else if (!strcmp(value, "if-asked"))
 142                        options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 143                else
 144                        return -1;
 145                return 0;
 146        } else if (!strcmp(name, "push-option")) {
 147                string_list_append(&options.push_options, value);
 148                return 0;
 149
 150#if LIBCURL_VERSION_NUM >= 0x070a08
 151        } else if (!strcmp(name, "family")) {
 152                if (!strcmp(value, "ipv4"))
 153                        git_curl_ipresolve = CURL_IPRESOLVE_V4;
 154                else if (!strcmp(value, "ipv6"))
 155                        git_curl_ipresolve = CURL_IPRESOLVE_V6;
 156                else if (!strcmp(value, "all"))
 157                        git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
 158                else
 159                        return -1;
 160                return 0;
 161#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
 162        } else {
 163                return 1 /* unsupported */;
 164        }
 165}
 166
 167struct discovery {
 168        char *service;
 169        char *buf_alloc;
 170        char *buf;
 171        size_t len;
 172        struct ref *refs;
 173        struct oid_array shallow;
 174        enum protocol_version version;
 175        unsigned proto_git : 1;
 176};
 177static struct discovery *last_discovery;
 178
 179static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 180{
 181        struct ref *list = NULL;
 182        struct packet_reader reader;
 183
 184        packet_reader_init(&reader, -1, heads->buf, heads->len,
 185                           PACKET_READ_CHOMP_NEWLINE |
 186                           PACKET_READ_GENTLE_ON_EOF);
 187
 188        heads->version = discover_version(&reader);
 189        switch (heads->version) {
 190        case protocol_v2:
 191                die("support for protocol v2 not implemented yet");
 192                break;
 193        case protocol_v1:
 194        case protocol_v0:
 195                get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
 196                                 NULL, &heads->shallow);
 197                break;
 198        case protocol_unknown_version:
 199                BUG("unknown protocol version");
 200        }
 201
 202        return list;
 203}
 204
 205static struct ref *parse_info_refs(struct discovery *heads)
 206{
 207        char *data, *start, *mid;
 208        char *ref_name;
 209        int i = 0;
 210
 211        struct ref *refs = NULL;
 212        struct ref *ref = NULL;
 213        struct ref *last_ref = NULL;
 214
 215        data = heads->buf;
 216        start = NULL;
 217        mid = data;
 218        while (i < heads->len) {
 219                if (!start) {
 220                        start = &data[i];
 221                }
 222                if (data[i] == '\t')
 223                        mid = &data[i];
 224                if (data[i] == '\n') {
 225                        if (mid - start != 40)
 226                                die("%sinfo/refs not valid: is this a git repository?",
 227                                    url.buf);
 228                        data[i] = 0;
 229                        ref_name = mid + 1;
 230                        ref = alloc_ref(ref_name);
 231                        get_oid_hex(start, &ref->old_oid);
 232                        if (!refs)
 233                                refs = ref;
 234                        if (last_ref)
 235                                last_ref->next = ref;
 236                        last_ref = ref;
 237                        start = NULL;
 238                }
 239                i++;
 240        }
 241
 242        ref = alloc_ref("HEAD");
 243        if (!http_fetch_ref(url.buf, ref) &&
 244            !resolve_remote_symref(ref, refs)) {
 245                ref->next = refs;
 246                refs = ref;
 247        } else {
 248                free(ref);
 249        }
 250
 251        return refs;
 252}
 253
 254static void free_discovery(struct discovery *d)
 255{
 256        if (d) {
 257                if (d == last_discovery)
 258                        last_discovery = NULL;
 259                free(d->shallow.oid);
 260                free(d->buf_alloc);
 261                free_refs(d->refs);
 262                free(d->service);
 263                free(d);
 264        }
 265}
 266
 267static int show_http_message(struct strbuf *type, struct strbuf *charset,
 268                             struct strbuf *msg)
 269{
 270        const char *p, *eol;
 271
 272        /*
 273         * We only show text/plain parts, as other types are likely
 274         * to be ugly to look at on the user's terminal.
 275         */
 276        if (strcmp(type->buf, "text/plain"))
 277                return -1;
 278        if (charset->len)
 279                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 280
 281        strbuf_trim(msg);
 282        if (!msg->len)
 283                return -1;
 284
 285        p = msg->buf;
 286        do {
 287                eol = strchrnul(p, '\n');
 288                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 289                p = eol + 1;
 290        } while(*eol);
 291        return 0;
 292}
 293
 294static struct discovery *discover_refs(const char *service, int for_push)
 295{
 296        struct strbuf exp = STRBUF_INIT;
 297        struct strbuf type = STRBUF_INIT;
 298        struct strbuf charset = STRBUF_INIT;
 299        struct strbuf buffer = STRBUF_INIT;
 300        struct strbuf refs_url = STRBUF_INIT;
 301        struct strbuf effective_url = STRBUF_INIT;
 302        struct discovery *last = last_discovery;
 303        int http_ret, maybe_smart = 0;
 304        struct http_get_options http_options;
 305
 306        if (last && !strcmp(service, last->service))
 307                return last;
 308        free_discovery(last);
 309
 310        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 311        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 312             git_env_bool("GIT_SMART_HTTP", 1)) {
 313                maybe_smart = 1;
 314                if (!strchr(url.buf, '?'))
 315                        strbuf_addch(&refs_url, '?');
 316                else
 317                        strbuf_addch(&refs_url, '&');
 318                strbuf_addf(&refs_url, "service=%s", service);
 319        }
 320
 321        memset(&http_options, 0, sizeof(http_options));
 322        http_options.content_type = &type;
 323        http_options.charset = &charset;
 324        http_options.effective_url = &effective_url;
 325        http_options.base_url = &url;
 326        http_options.initial_request = 1;
 327        http_options.no_cache = 1;
 328        http_options.keep_error = 1;
 329
 330        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 331        switch (http_ret) {
 332        case HTTP_OK:
 333                break;
 334        case HTTP_MISSING_TARGET:
 335                show_http_message(&type, &charset, &buffer);
 336                die("repository '%s' not found", url.buf);
 337        case HTTP_NOAUTH:
 338                show_http_message(&type, &charset, &buffer);
 339                die("Authentication failed for '%s'", url.buf);
 340        default:
 341                show_http_message(&type, &charset, &buffer);
 342                die("unable to access '%s': %s", url.buf, curl_errorstr);
 343        }
 344
 345        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 346                warning(_("redirecting to %s"), url.buf);
 347
 348        last= xcalloc(1, sizeof(*last_discovery));
 349        last->service = xstrdup(service);
 350        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 351        last->buf = last->buf_alloc;
 352
 353        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 354        if (maybe_smart &&
 355            (5 <= last->len && last->buf[4] == '#') &&
 356            !strbuf_cmp(&exp, &type)) {
 357                char *line;
 358
 359                /*
 360                 * smart HTTP response; validate that the service
 361                 * pkt-line matches our request.
 362                 */
 363                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 364
 365                strbuf_reset(&exp);
 366                strbuf_addf(&exp, "# service=%s", service);
 367                if (strcmp(line, exp.buf))
 368                        die("invalid server response; got '%s'", line);
 369                strbuf_release(&exp);
 370
 371                /* The header can include additional metadata lines, up
 372                 * until a packet flush marker.  Ignore these now, but
 373                 * in the future we might start to scan them.
 374                 */
 375                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 376                        ;
 377
 378                last->proto_git = 1;
 379        }
 380
 381        if (last->proto_git)
 382                last->refs = parse_git_refs(last, for_push);
 383        else
 384                last->refs = parse_info_refs(last);
 385
 386        strbuf_release(&refs_url);
 387        strbuf_release(&exp);
 388        strbuf_release(&type);
 389        strbuf_release(&charset);
 390        strbuf_release(&effective_url);
 391        strbuf_release(&buffer);
 392        last_discovery = last;
 393        return last;
 394}
 395
 396static struct ref *get_refs(int for_push)
 397{
 398        struct discovery *heads;
 399
 400        if (for_push)
 401                heads = discover_refs("git-receive-pack", for_push);
 402        else
 403                heads = discover_refs("git-upload-pack", for_push);
 404
 405        return heads->refs;
 406}
 407
 408static void output_refs(struct ref *refs)
 409{
 410        struct ref *posn;
 411        for (posn = refs; posn; posn = posn->next) {
 412                if (posn->symref)
 413                        printf("@%s %s\n", posn->symref, posn->name);
 414                else
 415                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 416        }
 417        printf("\n");
 418        fflush(stdout);
 419}
 420
 421struct rpc_state {
 422        const char *service_name;
 423        const char **argv;
 424        struct strbuf *stdin_preamble;
 425        char *service_url;
 426        char *hdr_content_type;
 427        char *hdr_accept;
 428        char *buf;
 429        size_t alloc;
 430        size_t len;
 431        size_t pos;
 432        int in;
 433        int out;
 434        int any_written;
 435        struct strbuf result;
 436        unsigned gzip_request : 1;
 437        unsigned initial_buffer : 1;
 438};
 439
 440static size_t rpc_out(void *ptr, size_t eltsize,
 441                size_t nmemb, void *buffer_)
 442{
 443        size_t max = eltsize * nmemb;
 444        struct rpc_state *rpc = buffer_;
 445        size_t avail = rpc->len - rpc->pos;
 446
 447        if (!avail) {
 448                rpc->initial_buffer = 0;
 449                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 450                if (!avail)
 451                        return 0;
 452                rpc->pos = 0;
 453                rpc->len = avail;
 454        }
 455
 456        if (max < avail)
 457                avail = max;
 458        memcpy(ptr, rpc->buf + rpc->pos, avail);
 459        rpc->pos += avail;
 460        return avail;
 461}
 462
 463#ifndef NO_CURL_IOCTL
 464static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 465{
 466        struct rpc_state *rpc = clientp;
 467
 468        switch (cmd) {
 469        case CURLIOCMD_NOP:
 470                return CURLIOE_OK;
 471
 472        case CURLIOCMD_RESTARTREAD:
 473                if (rpc->initial_buffer) {
 474                        rpc->pos = 0;
 475                        return CURLIOE_OK;
 476                }
 477                error("unable to rewind rpc post data - try increasing http.postBuffer");
 478                return CURLIOE_FAILRESTART;
 479
 480        default:
 481                return CURLIOE_UNKNOWNCMD;
 482        }
 483}
 484#endif
 485
 486static size_t rpc_in(char *ptr, size_t eltsize,
 487                size_t nmemb, void *buffer_)
 488{
 489        size_t size = eltsize * nmemb;
 490        struct rpc_state *rpc = buffer_;
 491        if (size)
 492                rpc->any_written = 1;
 493        write_or_die(rpc->in, ptr, size);
 494        return size;
 495}
 496
 497static int run_slot(struct active_request_slot *slot,
 498                    struct slot_results *results)
 499{
 500        int err;
 501        struct slot_results results_buf;
 502
 503        if (!results)
 504                results = &results_buf;
 505
 506        err = run_one_slot(slot, results);
 507
 508        if (err != HTTP_OK && err != HTTP_REAUTH) {
 509                struct strbuf msg = STRBUF_INIT;
 510                if (results->http_code && results->http_code != 200)
 511                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 512                if (results->curl_result != CURLE_OK) {
 513                        if (msg.len)
 514                                strbuf_addch(&msg, ' ');
 515                        strbuf_addf(&msg, "curl %d", results->curl_result);
 516                        if (curl_errorstr[0]) {
 517                                strbuf_addch(&msg, ' ');
 518                                strbuf_addstr(&msg, curl_errorstr);
 519                        }
 520                }
 521                error("RPC failed; %s", msg.buf);
 522                strbuf_release(&msg);
 523        }
 524
 525        return err;
 526}
 527
 528static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 529{
 530        struct active_request_slot *slot;
 531        struct curl_slist *headers = http_copy_default_headers();
 532        struct strbuf buf = STRBUF_INIT;
 533        int err;
 534
 535        slot = get_active_slot();
 536
 537        headers = curl_slist_append(headers, rpc->hdr_content_type);
 538        headers = curl_slist_append(headers, rpc->hdr_accept);
 539
 540        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 541        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 542        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 543        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 544        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 545        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 546        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 547        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 548        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 549
 550        err = run_slot(slot, results);
 551
 552        curl_slist_free_all(headers);
 553        strbuf_release(&buf);
 554        return err;
 555}
 556
 557static curl_off_t xcurl_off_t(ssize_t len) {
 558        if (len > maximum_signed_value_of_type(curl_off_t))
 559                die("cannot handle pushes this big");
 560        return (curl_off_t) len;
 561}
 562
 563static int post_rpc(struct rpc_state *rpc)
 564{
 565        struct active_request_slot *slot;
 566        struct curl_slist *headers = http_copy_default_headers();
 567        int use_gzip = rpc->gzip_request;
 568        char *gzip_body = NULL;
 569        size_t gzip_size = 0;
 570        int err, large_request = 0;
 571        int needs_100_continue = 0;
 572
 573        /* Try to load the entire request, if we can fit it into the
 574         * allocated buffer space we can use HTTP/1.0 and avoid the
 575         * chunked encoding mess.
 576         */
 577        while (1) {
 578                size_t left = rpc->alloc - rpc->len;
 579                char *buf = rpc->buf + rpc->len;
 580                int n;
 581
 582                if (left < LARGE_PACKET_MAX) {
 583                        large_request = 1;
 584                        use_gzip = 0;
 585                        break;
 586                }
 587
 588                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 589                if (!n)
 590                        break;
 591                rpc->len += n;
 592        }
 593
 594        if (large_request) {
 595                struct slot_results results;
 596
 597                do {
 598                        err = probe_rpc(rpc, &results);
 599                        if (err == HTTP_REAUTH)
 600                                credential_fill(&http_auth);
 601                } while (err == HTTP_REAUTH);
 602                if (err != HTTP_OK)
 603                        return -1;
 604
 605                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 606                        needs_100_continue = 1;
 607        }
 608
 609        headers = curl_slist_append(headers, rpc->hdr_content_type);
 610        headers = curl_slist_append(headers, rpc->hdr_accept);
 611        headers = curl_slist_append(headers, needs_100_continue ?
 612                "Expect: 100-continue" : "Expect:");
 613
 614retry:
 615        slot = get_active_slot();
 616
 617        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 618        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 619        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 620        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 621
 622        if (large_request) {
 623                /* The request body is large and the size cannot be predicted.
 624                 * We must use chunked encoding to send it.
 625                 */
 626                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 627                rpc->initial_buffer = 1;
 628                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 629                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 630#ifndef NO_CURL_IOCTL
 631                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 632                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 633#endif
 634                if (options.verbosity > 1) {
 635                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 636                        fflush(stderr);
 637                }
 638
 639        } else if (gzip_body) {
 640                /*
 641                 * If we are looping to retry authentication, then the previous
 642                 * run will have set up the headers and gzip buffer already,
 643                 * and we just need to send it.
 644                 */
 645                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 646                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 647
 648        } else if (use_gzip && 1024 < rpc->len) {
 649                /* The client backend isn't giving us compressed data so
 650                 * we can try to deflate it ourselves, this may save on.
 651                 * the transfer time.
 652                 */
 653                git_zstream stream;
 654                int ret;
 655
 656                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 657                gzip_size = git_deflate_bound(&stream, rpc->len);
 658                gzip_body = xmalloc(gzip_size);
 659
 660                stream.next_in = (unsigned char *)rpc->buf;
 661                stream.avail_in = rpc->len;
 662                stream.next_out = (unsigned char *)gzip_body;
 663                stream.avail_out = gzip_size;
 664
 665                ret = git_deflate(&stream, Z_FINISH);
 666                if (ret != Z_STREAM_END)
 667                        die("cannot deflate request; zlib deflate error %d", ret);
 668
 669                ret = git_deflate_end_gently(&stream);
 670                if (ret != Z_OK)
 671                        die("cannot deflate request; zlib end error %d", ret);
 672
 673                gzip_size = stream.total_out;
 674
 675                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 676                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 677                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 678
 679                if (options.verbosity > 1) {
 680                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 681                                rpc->service_name,
 682                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 683                        fflush(stderr);
 684                }
 685        } else {
 686                /* We know the complete request size in advance, use the
 687                 * more normal Content-Length approach.
 688                 */
 689                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 690                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 691                if (options.verbosity > 1) {
 692                        fprintf(stderr, "POST %s (%lu bytes)\n",
 693                                rpc->service_name, (unsigned long)rpc->len);
 694                        fflush(stderr);
 695                }
 696        }
 697
 698        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 699        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 700        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 701
 702
 703        rpc->any_written = 0;
 704        err = run_slot(slot, NULL);
 705        if (err == HTTP_REAUTH && !large_request) {
 706                credential_fill(&http_auth);
 707                goto retry;
 708        }
 709        if (err != HTTP_OK)
 710                err = -1;
 711
 712        if (!rpc->any_written)
 713                err = -1;
 714
 715        curl_slist_free_all(headers);
 716        free(gzip_body);
 717        return err;
 718}
 719
 720static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 721{
 722        const char *svc = rpc->service_name;
 723        struct strbuf buf = STRBUF_INIT;
 724        struct strbuf *preamble = rpc->stdin_preamble;
 725        struct child_process client = CHILD_PROCESS_INIT;
 726        int err = 0;
 727
 728        client.in = -1;
 729        client.out = -1;
 730        client.git_cmd = 1;
 731        client.argv = rpc->argv;
 732        if (start_command(&client))
 733                exit(1);
 734        if (preamble)
 735                write_or_die(client.in, preamble->buf, preamble->len);
 736        if (heads)
 737                write_or_die(client.in, heads->buf, heads->len);
 738
 739        rpc->alloc = http_post_buffer;
 740        rpc->buf = xmalloc(rpc->alloc);
 741        rpc->in = client.in;
 742        rpc->out = client.out;
 743        strbuf_init(&rpc->result, 0);
 744
 745        strbuf_addf(&buf, "%s%s", url.buf, svc);
 746        rpc->service_url = strbuf_detach(&buf, NULL);
 747
 748        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 749        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 750
 751        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 752        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 753
 754        while (!err) {
 755                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 756                if (!n)
 757                        break;
 758                rpc->pos = 0;
 759                rpc->len = n;
 760                err |= post_rpc(rpc);
 761        }
 762
 763        close(client.in);
 764        client.in = -1;
 765        if (!err) {
 766                strbuf_read(&rpc->result, client.out, 0);
 767        } else {
 768                char buf[4096];
 769                for (;;)
 770                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 771                                break;
 772        }
 773
 774        close(client.out);
 775        client.out = -1;
 776
 777        err |= finish_command(&client);
 778        free(rpc->service_url);
 779        free(rpc->hdr_content_type);
 780        free(rpc->hdr_accept);
 781        free(rpc->buf);
 782        strbuf_release(&buf);
 783        return err;
 784}
 785
 786static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 787{
 788        struct walker *walker;
 789        char **targets;
 790        int ret, i;
 791
 792        ALLOC_ARRAY(targets, nr_heads);
 793        if (options.depth || options.deepen_since)
 794                die("dumb http transport does not support shallow capabilities");
 795        for (i = 0; i < nr_heads; i++)
 796                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 797
 798        walker = get_http_walker(url.buf);
 799        walker->get_all = 1;
 800        walker->get_tree = 1;
 801        walker->get_history = 1;
 802        walker->get_verbosely = options.verbosity >= 3;
 803        walker->get_recover = 0;
 804        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 805        walker_free(walker);
 806
 807        for (i = 0; i < nr_heads; i++)
 808                free(targets[i]);
 809        free(targets);
 810
 811        return ret ? error("fetch failed.") : 0;
 812}
 813
 814static int fetch_git(struct discovery *heads,
 815        int nr_heads, struct ref **to_fetch)
 816{
 817        struct rpc_state rpc;
 818        struct strbuf preamble = STRBUF_INIT;
 819        int i, err;
 820        struct argv_array args = ARGV_ARRAY_INIT;
 821
 822        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 823                         "--stdin", "--lock-pack", NULL);
 824        if (options.followtags)
 825                argv_array_push(&args, "--include-tag");
 826        if (options.thin)
 827                argv_array_push(&args, "--thin");
 828        if (options.verbosity >= 3)
 829                argv_array_pushl(&args, "-v", "-v", NULL);
 830        if (options.check_self_contained_and_connected)
 831                argv_array_push(&args, "--check-self-contained-and-connected");
 832        if (options.cloning)
 833                argv_array_push(&args, "--cloning");
 834        if (options.update_shallow)
 835                argv_array_push(&args, "--update-shallow");
 836        if (!options.progress)
 837                argv_array_push(&args, "--no-progress");
 838        if (options.depth)
 839                argv_array_pushf(&args, "--depth=%lu", options.depth);
 840        if (options.deepen_since)
 841                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 842        for (i = 0; i < options.deepen_not.nr; i++)
 843                argv_array_pushf(&args, "--shallow-exclude=%s",
 844                                 options.deepen_not.items[i].string);
 845        if (options.deepen_relative && options.depth)
 846                argv_array_push(&args, "--deepen-relative");
 847        argv_array_push(&args, url.buf);
 848
 849        for (i = 0; i < nr_heads; i++) {
 850                struct ref *ref = to_fetch[i];
 851                if (!*ref->name)
 852                        die("cannot fetch by sha1 over smart http");
 853                packet_buf_write(&preamble, "%s %s\n",
 854                                 oid_to_hex(&ref->old_oid), ref->name);
 855        }
 856        packet_buf_flush(&preamble);
 857
 858        memset(&rpc, 0, sizeof(rpc));
 859        rpc.service_name = "git-upload-pack",
 860        rpc.argv = args.argv;
 861        rpc.stdin_preamble = &preamble;
 862        rpc.gzip_request = 1;
 863
 864        err = rpc_service(&rpc, heads);
 865        if (rpc.result.len)
 866                write_or_die(1, rpc.result.buf, rpc.result.len);
 867        strbuf_release(&rpc.result);
 868        strbuf_release(&preamble);
 869        argv_array_clear(&args);
 870        return err;
 871}
 872
 873static int fetch(int nr_heads, struct ref **to_fetch)
 874{
 875        struct discovery *d = discover_refs("git-upload-pack", 0);
 876        if (d->proto_git)
 877                return fetch_git(d, nr_heads, to_fetch);
 878        else
 879                return fetch_dumb(nr_heads, to_fetch);
 880}
 881
 882static void parse_fetch(struct strbuf *buf)
 883{
 884        struct ref **to_fetch = NULL;
 885        struct ref *list_head = NULL;
 886        struct ref **list = &list_head;
 887        int alloc_heads = 0, nr_heads = 0;
 888
 889        do {
 890                const char *p;
 891                if (skip_prefix(buf->buf, "fetch ", &p)) {
 892                        const char *name;
 893                        struct ref *ref;
 894                        struct object_id old_oid;
 895
 896                        if (get_oid_hex(p, &old_oid))
 897                                die("protocol error: expected sha/ref, got %s'", p);
 898                        if (p[GIT_SHA1_HEXSZ] == ' ')
 899                                name = p + GIT_SHA1_HEXSZ + 1;
 900                        else if (!p[GIT_SHA1_HEXSZ])
 901                                name = "";
 902                        else
 903                                die("protocol error: expected sha/ref, got %s'", p);
 904
 905                        ref = alloc_ref(name);
 906                        oidcpy(&ref->old_oid, &old_oid);
 907
 908                        *list = ref;
 909                        list = &ref->next;
 910
 911                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 912                        to_fetch[nr_heads++] = ref;
 913                }
 914                else
 915                        die("http transport does not support %s", buf->buf);
 916
 917                strbuf_reset(buf);
 918                if (strbuf_getline_lf(buf, stdin) == EOF)
 919                        return;
 920                if (!*buf->buf)
 921                        break;
 922        } while (1);
 923
 924        if (fetch(nr_heads, to_fetch))
 925                exit(128); /* error already reported */
 926        free_refs(list_head);
 927        free(to_fetch);
 928
 929        printf("\n");
 930        fflush(stdout);
 931        strbuf_reset(buf);
 932}
 933
 934static int push_dav(int nr_spec, char **specs)
 935{
 936        struct child_process child = CHILD_PROCESS_INIT;
 937        size_t i;
 938
 939        child.git_cmd = 1;
 940        argv_array_push(&child.args, "http-push");
 941        argv_array_push(&child.args, "--helper-status");
 942        if (options.dry_run)
 943                argv_array_push(&child.args, "--dry-run");
 944        if (options.verbosity > 1)
 945                argv_array_push(&child.args, "--verbose");
 946        argv_array_push(&child.args, url.buf);
 947        for (i = 0; i < nr_spec; i++)
 948                argv_array_push(&child.args, specs[i]);
 949
 950        if (run_command(&child))
 951                die("git-http-push failed");
 952        return 0;
 953}
 954
 955static int push_git(struct discovery *heads, int nr_spec, char **specs)
 956{
 957        struct rpc_state rpc;
 958        int i, err;
 959        struct argv_array args;
 960        struct string_list_item *cas_option;
 961        struct strbuf preamble = STRBUF_INIT;
 962
 963        argv_array_init(&args);
 964        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 965                         NULL);
 966
 967        if (options.thin)
 968                argv_array_push(&args, "--thin");
 969        if (options.dry_run)
 970                argv_array_push(&args, "--dry-run");
 971        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 972                argv_array_push(&args, "--signed=yes");
 973        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 974                argv_array_push(&args, "--signed=if-asked");
 975        if (options.verbosity == 0)
 976                argv_array_push(&args, "--quiet");
 977        else if (options.verbosity > 1)
 978                argv_array_push(&args, "--verbose");
 979        for (i = 0; i < options.push_options.nr; i++)
 980                argv_array_pushf(&args, "--push-option=%s",
 981                                 options.push_options.items[i].string);
 982        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 983        for_each_string_list_item(cas_option, &cas_options)
 984                argv_array_push(&args, cas_option->string);
 985        argv_array_push(&args, url.buf);
 986
 987        argv_array_push(&args, "--stdin");
 988        for (i = 0; i < nr_spec; i++)
 989                packet_buf_write(&preamble, "%s\n", specs[i]);
 990        packet_buf_flush(&preamble);
 991
 992        memset(&rpc, 0, sizeof(rpc));
 993        rpc.service_name = "git-receive-pack",
 994        rpc.argv = args.argv;
 995        rpc.stdin_preamble = &preamble;
 996
 997        err = rpc_service(&rpc, heads);
 998        if (rpc.result.len)
 999                write_or_die(1, rpc.result.buf, rpc.result.len);
1000        strbuf_release(&rpc.result);
1001        strbuf_release(&preamble);
1002        argv_array_clear(&args);
1003        return err;
1004}
1005
1006static int push(int nr_spec, char **specs)
1007{
1008        struct discovery *heads = discover_refs("git-receive-pack", 1);
1009        int ret;
1010
1011        if (heads->proto_git)
1012                ret = push_git(heads, nr_spec, specs);
1013        else
1014                ret = push_dav(nr_spec, specs);
1015        free_discovery(heads);
1016        return ret;
1017}
1018
1019static void parse_push(struct strbuf *buf)
1020{
1021        char **specs = NULL;
1022        int alloc_spec = 0, nr_spec = 0, i, ret;
1023
1024        do {
1025                if (starts_with(buf->buf, "push ")) {
1026                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1027                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1028                }
1029                else
1030                        die("http transport does not support %s", buf->buf);
1031
1032                strbuf_reset(buf);
1033                if (strbuf_getline_lf(buf, stdin) == EOF)
1034                        goto free_specs;
1035                if (!*buf->buf)
1036                        break;
1037        } while (1);
1038
1039        ret = push(nr_spec, specs);
1040        printf("\n");
1041        fflush(stdout);
1042
1043        if (ret)
1044                exit(128); /* error already reported */
1045
1046 free_specs:
1047        for (i = 0; i < nr_spec; i++)
1048                free(specs[i]);
1049        free(specs);
1050}
1051
1052int cmd_main(int argc, const char **argv)
1053{
1054        struct strbuf buf = STRBUF_INIT;
1055        int nongit;
1056
1057        setup_git_directory_gently(&nongit);
1058        if (argc < 2) {
1059                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1060                return 1;
1061        }
1062
1063        options.verbosity = 1;
1064        options.progress = !!isatty(2);
1065        options.thin = 1;
1066        string_list_init(&options.deepen_not, 1);
1067        string_list_init(&options.push_options, 1);
1068
1069        remote = remote_get(argv[1]);
1070
1071        if (argc > 2) {
1072                end_url_with_slash(&url, argv[2]);
1073        } else {
1074                end_url_with_slash(&url, remote->url[0]);
1075        }
1076
1077        http_init(remote, url.buf, 0);
1078
1079        do {
1080                const char *arg;
1081
1082                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1083                        if (ferror(stdin))
1084                                error("remote-curl: error reading command stream from git");
1085                        return 1;
1086                }
1087                if (buf.len == 0)
1088                        break;
1089                if (starts_with(buf.buf, "fetch ")) {
1090                        if (nongit)
1091                                die("remote-curl: fetch attempted without a local repo");
1092                        parse_fetch(&buf);
1093
1094                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1095                        int for_push = !!strstr(buf.buf + 4, "for-push");
1096                        output_refs(get_refs(for_push));
1097
1098                } else if (starts_with(buf.buf, "push ")) {
1099                        parse_push(&buf);
1100
1101                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1102                        char *value = strchr(arg, ' ');
1103                        int result;
1104
1105                        if (value)
1106                                *value++ = '\0';
1107                        else
1108                                value = "true";
1109
1110                        result = set_option(arg, value);
1111                        if (!result)
1112                                printf("ok\n");
1113                        else if (result < 0)
1114                                printf("error invalid value\n");
1115                        else
1116                                printf("unsupported\n");
1117                        fflush(stdout);
1118
1119                } else if (!strcmp(buf.buf, "capabilities")) {
1120                        printf("fetch\n");
1121                        printf("option\n");
1122                        printf("push\n");
1123                        printf("check-connectivity\n");
1124                        printf("\n");
1125                        fflush(stdout);
1126                } else {
1127                        error("remote-curl: unknown command '%s' from git", buf.buf);
1128                        return 1;
1129                }
1130                strbuf_reset(&buf);
1131        } while (1);
1132
1133        http_cleanup();
1134
1135        return 0;
1136}