Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit remote-curl: unquote incoming push-options (90dce21)
   1#include "cache.h"
   2#include "config.h"
   3#include "remote.h"
   4#include "strbuf.h"
   5#include "walker.h"
   6#include "http.h"
   7#include "exec_cmd.h"
   8#include "run-command.h"
   9#include "pkt-line.h"
  10#include "string-list.h"
  11#include "sideband.h"
  12#include "argv-array.h"
  13#include "credential.h"
  14#include "sha1-array.h"
  15#include "send-pack.h"
  16#include "quote.h"
  17
  18static struct remote *remote;
  19/* always ends with a trailing slash */
  20static struct strbuf url = STRBUF_INIT;
  21
  22struct options {
  23        int verbosity;
  24        unsigned long depth;
  25        char *deepen_since;
  26        struct string_list deepen_not;
  27        struct string_list push_options;
  28        unsigned progress : 1,
  29                check_self_contained_and_connected : 1,
  30                cloning : 1,
  31                update_shallow : 1,
  32                followtags : 1,
  33                dry_run : 1,
  34                thin : 1,
  35                /* One of the SEND_PACK_PUSH_CERT_* constants. */
  36                push_cert : 2,
  37                deepen_relative : 1;
  38};
  39static struct options options;
  40static struct string_list cas_options = STRING_LIST_INIT_DUP;
  41
  42static int set_option(const char *name, const char *value)
  43{
  44        if (!strcmp(name, "verbosity")) {
  45                char *end;
  46                int v = strtol(value, &end, 10);
  47                if (value == end || *end)
  48                        return -1;
  49                options.verbosity = v;
  50                return 0;
  51        }
  52        else if (!strcmp(name, "progress")) {
  53                if (!strcmp(value, "true"))
  54                        options.progress = 1;
  55                else if (!strcmp(value, "false"))
  56                        options.progress = 0;
  57                else
  58                        return -1;
  59                return 0;
  60        }
  61        else if (!strcmp(name, "depth")) {
  62                char *end;
  63                unsigned long v = strtoul(value, &end, 10);
  64                if (value == end || *end)
  65                        return -1;
  66                options.depth = v;
  67                return 0;
  68        }
  69        else if (!strcmp(name, "deepen-since")) {
  70                options.deepen_since = xstrdup(value);
  71                return 0;
  72        }
  73        else if (!strcmp(name, "deepen-not")) {
  74                string_list_append(&options.deepen_not, value);
  75                return 0;
  76        }
  77        else if (!strcmp(name, "deepen-relative")) {
  78                if (!strcmp(value, "true"))
  79                        options.deepen_relative = 1;
  80                else if (!strcmp(value, "false"))
  81                        options.deepen_relative = 0;
  82                else
  83                        return -1;
  84                return 0;
  85        }
  86        else if (!strcmp(name, "followtags")) {
  87                if (!strcmp(value, "true"))
  88                        options.followtags = 1;
  89                else if (!strcmp(value, "false"))
  90                        options.followtags = 0;
  91                else
  92                        return -1;
  93                return 0;
  94        }
  95        else if (!strcmp(name, "dry-run")) {
  96                if (!strcmp(value, "true"))
  97                        options.dry_run = 1;
  98                else if (!strcmp(value, "false"))
  99                        options.dry_run = 0;
 100                else
 101                        return -1;
 102                return 0;
 103        }
 104        else if (!strcmp(name, "check-connectivity")) {
 105                if (!strcmp(value, "true"))
 106                        options.check_self_contained_and_connected = 1;
 107                else if (!strcmp(value, "false"))
 108                        options.check_self_contained_and_connected = 0;
 109                else
 110                        return -1;
 111                return 0;
 112        }
 113        else if (!strcmp(name, "cas")) {
 114                struct strbuf val = STRBUF_INIT;
 115                strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
 116                string_list_append(&cas_options, val.buf);
 117                strbuf_release(&val);
 118                return 0;
 119        } else if (!strcmp(name, "cloning")) {
 120                if (!strcmp(value, "true"))
 121                        options.cloning = 1;
 122                else if (!strcmp(value, "false"))
 123                        options.cloning = 0;
 124                else
 125                        return -1;
 126                return 0;
 127        } else if (!strcmp(name, "update-shallow")) {
 128                if (!strcmp(value, "true"))
 129                        options.update_shallow = 1;
 130                else if (!strcmp(value, "false"))
 131                        options.update_shallow = 0;
 132                else
 133                        return -1;
 134                return 0;
 135        } else if (!strcmp(name, "pushcert")) {
 136                if (!strcmp(value, "true"))
 137                        options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 138                else if (!strcmp(value, "false"))
 139                        options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 140                else if (!strcmp(value, "if-asked"))
 141                        options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 142                else
 143                        return -1;
 144                return 0;
 145        } else if (!strcmp(name, "push-option")) {
 146                if (*value != '"')
 147                        string_list_append(&options.push_options, value);
 148                else {
 149                        struct strbuf unquoted = STRBUF_INIT;
 150                        if (unquote_c_style(&unquoted, value, NULL) < 0)
 151                                die("invalid quoting in push-option value");
 152                        string_list_append_nodup(&options.push_options,
 153                                                 strbuf_detach(&unquoted, NULL));
 154                }
 155                return 0;
 156
 157#if LIBCURL_VERSION_NUM >= 0x070a08
 158        } else if (!strcmp(name, "family")) {
 159                if (!strcmp(value, "ipv4"))
 160                        git_curl_ipresolve = CURL_IPRESOLVE_V4;
 161                else if (!strcmp(value, "ipv6"))
 162                        git_curl_ipresolve = CURL_IPRESOLVE_V6;
 163                else if (!strcmp(value, "all"))
 164                        git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
 165                else
 166                        return -1;
 167                return 0;
 168#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
 169        } else {
 170                return 1 /* unsupported */;
 171        }
 172}
 173
 174struct discovery {
 175        const char *service;
 176        char *buf_alloc;
 177        char *buf;
 178        size_t len;
 179        struct ref *refs;
 180        struct oid_array shallow;
 181        unsigned proto_git : 1;
 182};
 183static struct discovery *last_discovery;
 184
 185static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 186{
 187        struct ref *list = NULL;
 188        get_remote_heads(-1, heads->buf, heads->len, &list,
 189                         for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
 190        return list;
 191}
 192
 193static struct ref *parse_info_refs(struct discovery *heads)
 194{
 195        char *data, *start, *mid;
 196        char *ref_name;
 197        int i = 0;
 198
 199        struct ref *refs = NULL;
 200        struct ref *ref = NULL;
 201        struct ref *last_ref = NULL;
 202
 203        data = heads->buf;
 204        start = NULL;
 205        mid = data;
 206        while (i < heads->len) {
 207                if (!start) {
 208                        start = &data[i];
 209                }
 210                if (data[i] == '\t')
 211                        mid = &data[i];
 212                if (data[i] == '\n') {
 213                        if (mid - start != 40)
 214                                die("%sinfo/refs not valid: is this a git repository?",
 215                                    url.buf);
 216                        data[i] = 0;
 217                        ref_name = mid + 1;
 218                        ref = alloc_ref(ref_name);
 219                        get_oid_hex(start, &ref->old_oid);
 220                        if (!refs)
 221                                refs = ref;
 222                        if (last_ref)
 223                                last_ref->next = ref;
 224                        last_ref = ref;
 225                        start = NULL;
 226                }
 227                i++;
 228        }
 229
 230        ref = alloc_ref("HEAD");
 231        if (!http_fetch_ref(url.buf, ref) &&
 232            !resolve_remote_symref(ref, refs)) {
 233                ref->next = refs;
 234                refs = ref;
 235        } else {
 236                free(ref);
 237        }
 238
 239        return refs;
 240}
 241
 242static void free_discovery(struct discovery *d)
 243{
 244        if (d) {
 245                if (d == last_discovery)
 246                        last_discovery = NULL;
 247                free(d->shallow.oid);
 248                free(d->buf_alloc);
 249                free_refs(d->refs);
 250                free(d);
 251        }
 252}
 253
 254static int show_http_message(struct strbuf *type, struct strbuf *charset,
 255                             struct strbuf *msg)
 256{
 257        const char *p, *eol;
 258
 259        /*
 260         * We only show text/plain parts, as other types are likely
 261         * to be ugly to look at on the user's terminal.
 262         */
 263        if (strcmp(type->buf, "text/plain"))
 264                return -1;
 265        if (charset->len)
 266                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 267
 268        strbuf_trim(msg);
 269        if (!msg->len)
 270                return -1;
 271
 272        p = msg->buf;
 273        do {
 274                eol = strchrnul(p, '\n');
 275                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 276                p = eol + 1;
 277        } while(*eol);
 278        return 0;
 279}
 280
 281static struct discovery *discover_refs(const char *service, int for_push)
 282{
 283        struct strbuf exp = STRBUF_INIT;
 284        struct strbuf type = STRBUF_INIT;
 285        struct strbuf charset = STRBUF_INIT;
 286        struct strbuf buffer = STRBUF_INIT;
 287        struct strbuf refs_url = STRBUF_INIT;
 288        struct strbuf effective_url = STRBUF_INIT;
 289        struct discovery *last = last_discovery;
 290        int http_ret, maybe_smart = 0;
 291        struct http_get_options http_options;
 292
 293        if (last && !strcmp(service, last->service))
 294                return last;
 295        free_discovery(last);
 296
 297        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 298        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 299             git_env_bool("GIT_SMART_HTTP", 1)) {
 300                maybe_smart = 1;
 301                if (!strchr(url.buf, '?'))
 302                        strbuf_addch(&refs_url, '?');
 303                else
 304                        strbuf_addch(&refs_url, '&');
 305                strbuf_addf(&refs_url, "service=%s", service);
 306        }
 307
 308        memset(&http_options, 0, sizeof(http_options));
 309        http_options.content_type = &type;
 310        http_options.charset = &charset;
 311        http_options.effective_url = &effective_url;
 312        http_options.base_url = &url;
 313        http_options.initial_request = 1;
 314        http_options.no_cache = 1;
 315        http_options.keep_error = 1;
 316
 317        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 318        switch (http_ret) {
 319        case HTTP_OK:
 320                break;
 321        case HTTP_MISSING_TARGET:
 322                show_http_message(&type, &charset, &buffer);
 323                die("repository '%s' not found", url.buf);
 324        case HTTP_NOAUTH:
 325                show_http_message(&type, &charset, &buffer);
 326                die("Authentication failed for '%s'", url.buf);
 327        default:
 328                show_http_message(&type, &charset, &buffer);
 329                die("unable to access '%s': %s", url.buf, curl_errorstr);
 330        }
 331
 332        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 333                warning(_("redirecting to %s"), url.buf);
 334
 335        last= xcalloc(1, sizeof(*last_discovery));
 336        last->service = service;
 337        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 338        last->buf = last->buf_alloc;
 339
 340        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 341        if (maybe_smart &&
 342            (5 <= last->len && last->buf[4] == '#') &&
 343            !strbuf_cmp(&exp, &type)) {
 344                char *line;
 345
 346                /*
 347                 * smart HTTP response; validate that the service
 348                 * pkt-line matches our request.
 349                 */
 350                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 351
 352                strbuf_reset(&exp);
 353                strbuf_addf(&exp, "# service=%s", service);
 354                if (strcmp(line, exp.buf))
 355                        die("invalid server response; got '%s'", line);
 356                strbuf_release(&exp);
 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                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 363                        ;
 364
 365                last->proto_git = 1;
 366        }
 367
 368        if (last->proto_git)
 369                last->refs = parse_git_refs(last, for_push);
 370        else
 371                last->refs = parse_info_refs(last);
 372
 373        strbuf_release(&refs_url);
 374        strbuf_release(&exp);
 375        strbuf_release(&type);
 376        strbuf_release(&charset);
 377        strbuf_release(&effective_url);
 378        strbuf_release(&buffer);
 379        last_discovery = last;
 380        return last;
 381}
 382
 383static struct ref *get_refs(int for_push)
 384{
 385        struct discovery *heads;
 386
 387        if (for_push)
 388                heads = discover_refs("git-receive-pack", for_push);
 389        else
 390                heads = discover_refs("git-upload-pack", for_push);
 391
 392        return heads->refs;
 393}
 394
 395static void output_refs(struct ref *refs)
 396{
 397        struct ref *posn;
 398        for (posn = refs; posn; posn = posn->next) {
 399                if (posn->symref)
 400                        printf("@%s %s\n", posn->symref, posn->name);
 401                else
 402                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 403        }
 404        printf("\n");
 405        fflush(stdout);
 406}
 407
 408struct rpc_state {
 409        const char *service_name;
 410        const char **argv;
 411        struct strbuf *stdin_preamble;
 412        char *service_url;
 413        char *hdr_content_type;
 414        char *hdr_accept;
 415        char *buf;
 416        size_t alloc;
 417        size_t len;
 418        size_t pos;
 419        int in;
 420        int out;
 421        int any_written;
 422        struct strbuf result;
 423        unsigned gzip_request : 1;
 424        unsigned initial_buffer : 1;
 425};
 426
 427static size_t rpc_out(void *ptr, size_t eltsize,
 428                size_t nmemb, void *buffer_)
 429{
 430        size_t max = eltsize * nmemb;
 431        struct rpc_state *rpc = buffer_;
 432        size_t avail = rpc->len - rpc->pos;
 433
 434        if (!avail) {
 435                rpc->initial_buffer = 0;
 436                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 437                if (!avail)
 438                        return 0;
 439                rpc->pos = 0;
 440                rpc->len = avail;
 441        }
 442
 443        if (max < avail)
 444                avail = max;
 445        memcpy(ptr, rpc->buf + rpc->pos, avail);
 446        rpc->pos += avail;
 447        return avail;
 448}
 449
 450#ifndef NO_CURL_IOCTL
 451static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 452{
 453        struct rpc_state *rpc = clientp;
 454
 455        switch (cmd) {
 456        case CURLIOCMD_NOP:
 457                return CURLIOE_OK;
 458
 459        case CURLIOCMD_RESTARTREAD:
 460                if (rpc->initial_buffer) {
 461                        rpc->pos = 0;
 462                        return CURLIOE_OK;
 463                }
 464                error("unable to rewind rpc post data - try increasing http.postBuffer");
 465                return CURLIOE_FAILRESTART;
 466
 467        default:
 468                return CURLIOE_UNKNOWNCMD;
 469        }
 470}
 471#endif
 472
 473static size_t rpc_in(char *ptr, size_t eltsize,
 474                size_t nmemb, void *buffer_)
 475{
 476        size_t size = eltsize * nmemb;
 477        struct rpc_state *rpc = buffer_;
 478        if (size)
 479                rpc->any_written = 1;
 480        write_or_die(rpc->in, ptr, size);
 481        return size;
 482}
 483
 484static int run_slot(struct active_request_slot *slot,
 485                    struct slot_results *results)
 486{
 487        int err;
 488        struct slot_results results_buf;
 489
 490        if (!results)
 491                results = &results_buf;
 492
 493        err = run_one_slot(slot, results);
 494
 495        if (err != HTTP_OK && err != HTTP_REAUTH) {
 496                struct strbuf msg = STRBUF_INIT;
 497                if (results->http_code && results->http_code != 200)
 498                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 499                if (results->curl_result != CURLE_OK) {
 500                        if (msg.len)
 501                                strbuf_addch(&msg, ' ');
 502                        strbuf_addf(&msg, "curl %d", results->curl_result);
 503                        if (curl_errorstr[0]) {
 504                                strbuf_addch(&msg, ' ');
 505                                strbuf_addstr(&msg, curl_errorstr);
 506                        }
 507                }
 508                error("RPC failed; %s", msg.buf);
 509                strbuf_release(&msg);
 510        }
 511
 512        return err;
 513}
 514
 515static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 516{
 517        struct active_request_slot *slot;
 518        struct curl_slist *headers = http_copy_default_headers();
 519        struct strbuf buf = STRBUF_INIT;
 520        int err;
 521
 522        slot = get_active_slot();
 523
 524        headers = curl_slist_append(headers, rpc->hdr_content_type);
 525        headers = curl_slist_append(headers, rpc->hdr_accept);
 526
 527        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 528        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 529        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 530        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 531        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 532        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 533        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 534        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 535        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 536
 537        err = run_slot(slot, results);
 538
 539        curl_slist_free_all(headers);
 540        strbuf_release(&buf);
 541        return err;
 542}
 543
 544static curl_off_t xcurl_off_t(ssize_t len) {
 545        if (len > maximum_signed_value_of_type(curl_off_t))
 546                die("cannot handle pushes this big");
 547        return (curl_off_t) len;
 548}
 549
 550static int post_rpc(struct rpc_state *rpc)
 551{
 552        struct active_request_slot *slot;
 553        struct curl_slist *headers = http_copy_default_headers();
 554        int use_gzip = rpc->gzip_request;
 555        char *gzip_body = NULL;
 556        size_t gzip_size = 0;
 557        int err, large_request = 0;
 558        int needs_100_continue = 0;
 559
 560        /* Try to load the entire request, if we can fit it into the
 561         * allocated buffer space we can use HTTP/1.0 and avoid the
 562         * chunked encoding mess.
 563         */
 564        while (1) {
 565                size_t left = rpc->alloc - rpc->len;
 566                char *buf = rpc->buf + rpc->len;
 567                int n;
 568
 569                if (left < LARGE_PACKET_MAX) {
 570                        large_request = 1;
 571                        use_gzip = 0;
 572                        break;
 573                }
 574
 575                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 576                if (!n)
 577                        break;
 578                rpc->len += n;
 579        }
 580
 581        if (large_request) {
 582                struct slot_results results;
 583
 584                do {
 585                        err = probe_rpc(rpc, &results);
 586                        if (err == HTTP_REAUTH)
 587                                credential_fill(&http_auth);
 588                } while (err == HTTP_REAUTH);
 589                if (err != HTTP_OK)
 590                        return -1;
 591
 592                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 593                        needs_100_continue = 1;
 594        }
 595
 596        headers = curl_slist_append(headers, rpc->hdr_content_type);
 597        headers = curl_slist_append(headers, rpc->hdr_accept);
 598        headers = curl_slist_append(headers, needs_100_continue ?
 599                "Expect: 100-continue" : "Expect:");
 600
 601retry:
 602        slot = get_active_slot();
 603
 604        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 605        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 606        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 607        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 608
 609        if (large_request) {
 610                /* The request body is large and the size cannot be predicted.
 611                 * We must use chunked encoding to send it.
 612                 */
 613                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 614                rpc->initial_buffer = 1;
 615                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 616                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 617#ifndef NO_CURL_IOCTL
 618                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 619                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 620#endif
 621                if (options.verbosity > 1) {
 622                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 623                        fflush(stderr);
 624                }
 625
 626        } else if (gzip_body) {
 627                /*
 628                 * If we are looping to retry authentication, then the previous
 629                 * run will have set up the headers and gzip buffer already,
 630                 * and we just need to send it.
 631                 */
 632                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 633                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 634
 635        } else if (use_gzip && 1024 < rpc->len) {
 636                /* The client backend isn't giving us compressed data so
 637                 * we can try to deflate it ourselves, this may save on.
 638                 * the transfer time.
 639                 */
 640                git_zstream stream;
 641                int ret;
 642
 643                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 644                gzip_size = git_deflate_bound(&stream, rpc->len);
 645                gzip_body = xmalloc(gzip_size);
 646
 647                stream.next_in = (unsigned char *)rpc->buf;
 648                stream.avail_in = rpc->len;
 649                stream.next_out = (unsigned char *)gzip_body;
 650                stream.avail_out = gzip_size;
 651
 652                ret = git_deflate(&stream, Z_FINISH);
 653                if (ret != Z_STREAM_END)
 654                        die("cannot deflate request; zlib deflate error %d", ret);
 655
 656                ret = git_deflate_end_gently(&stream);
 657                if (ret != Z_OK)
 658                        die("cannot deflate request; zlib end error %d", ret);
 659
 660                gzip_size = stream.total_out;
 661
 662                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 663                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 664                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 665
 666                if (options.verbosity > 1) {
 667                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 668                                rpc->service_name,
 669                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 670                        fflush(stderr);
 671                }
 672        } else {
 673                /* We know the complete request size in advance, use the
 674                 * more normal Content-Length approach.
 675                 */
 676                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 677                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 678                if (options.verbosity > 1) {
 679                        fprintf(stderr, "POST %s (%lu bytes)\n",
 680                                rpc->service_name, (unsigned long)rpc->len);
 681                        fflush(stderr);
 682                }
 683        }
 684
 685        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 686        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 687        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 688
 689
 690        rpc->any_written = 0;
 691        err = run_slot(slot, NULL);
 692        if (err == HTTP_REAUTH && !large_request) {
 693                credential_fill(&http_auth);
 694                goto retry;
 695        }
 696        if (err != HTTP_OK)
 697                err = -1;
 698
 699        if (!rpc->any_written)
 700                err = -1;
 701
 702        curl_slist_free_all(headers);
 703        free(gzip_body);
 704        return err;
 705}
 706
 707static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 708{
 709        const char *svc = rpc->service_name;
 710        struct strbuf buf = STRBUF_INIT;
 711        struct strbuf *preamble = rpc->stdin_preamble;
 712        struct child_process client = CHILD_PROCESS_INIT;
 713        int err = 0;
 714
 715        client.in = -1;
 716        client.out = -1;
 717        client.git_cmd = 1;
 718        client.argv = rpc->argv;
 719        if (start_command(&client))
 720                exit(1);
 721        if (preamble)
 722                write_or_die(client.in, preamble->buf, preamble->len);
 723        if (heads)
 724                write_or_die(client.in, heads->buf, heads->len);
 725
 726        rpc->alloc = http_post_buffer;
 727        rpc->buf = xmalloc(rpc->alloc);
 728        rpc->in = client.in;
 729        rpc->out = client.out;
 730        strbuf_init(&rpc->result, 0);
 731
 732        strbuf_addf(&buf, "%s%s", url.buf, svc);
 733        rpc->service_url = strbuf_detach(&buf, NULL);
 734
 735        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 736        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 737
 738        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 739        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 740
 741        while (!err) {
 742                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 743                if (!n)
 744                        break;
 745                rpc->pos = 0;
 746                rpc->len = n;
 747                err |= post_rpc(rpc);
 748        }
 749
 750        close(client.in);
 751        client.in = -1;
 752        if (!err) {
 753                strbuf_read(&rpc->result, client.out, 0);
 754        } else {
 755                char buf[4096];
 756                for (;;)
 757                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 758                                break;
 759        }
 760
 761        close(client.out);
 762        client.out = -1;
 763
 764        err |= finish_command(&client);
 765        free(rpc->service_url);
 766        free(rpc->hdr_content_type);
 767        free(rpc->hdr_accept);
 768        free(rpc->buf);
 769        strbuf_release(&buf);
 770        return err;
 771}
 772
 773static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 774{
 775        struct walker *walker;
 776        char **targets;
 777        int ret, i;
 778
 779        ALLOC_ARRAY(targets, nr_heads);
 780        if (options.depth || options.deepen_since)
 781                die("dumb http transport does not support shallow capabilities");
 782        for (i = 0; i < nr_heads; i++)
 783                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 784
 785        walker = get_http_walker(url.buf);
 786        walker->get_all = 1;
 787        walker->get_tree = 1;
 788        walker->get_history = 1;
 789        walker->get_verbosely = options.verbosity >= 3;
 790        walker->get_recover = 0;
 791        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 792        walker_free(walker);
 793
 794        for (i = 0; i < nr_heads; i++)
 795                free(targets[i]);
 796        free(targets);
 797
 798        return ret ? error("fetch failed.") : 0;
 799}
 800
 801static int fetch_git(struct discovery *heads,
 802        int nr_heads, struct ref **to_fetch)
 803{
 804        struct rpc_state rpc;
 805        struct strbuf preamble = STRBUF_INIT;
 806        int i, err;
 807        struct argv_array args = ARGV_ARRAY_INIT;
 808
 809        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 810                         "--stdin", "--lock-pack", NULL);
 811        if (options.followtags)
 812                argv_array_push(&args, "--include-tag");
 813        if (options.thin)
 814                argv_array_push(&args, "--thin");
 815        if (options.verbosity >= 3)
 816                argv_array_pushl(&args, "-v", "-v", NULL);
 817        if (options.check_self_contained_and_connected)
 818                argv_array_push(&args, "--check-self-contained-and-connected");
 819        if (options.cloning)
 820                argv_array_push(&args, "--cloning");
 821        if (options.update_shallow)
 822                argv_array_push(&args, "--update-shallow");
 823        if (!options.progress)
 824                argv_array_push(&args, "--no-progress");
 825        if (options.depth)
 826                argv_array_pushf(&args, "--depth=%lu", options.depth);
 827        if (options.deepen_since)
 828                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 829        for (i = 0; i < options.deepen_not.nr; i++)
 830                argv_array_pushf(&args, "--shallow-exclude=%s",
 831                                 options.deepen_not.items[i].string);
 832        if (options.deepen_relative && options.depth)
 833                argv_array_push(&args, "--deepen-relative");
 834        argv_array_push(&args, url.buf);
 835
 836        for (i = 0; i < nr_heads; i++) {
 837                struct ref *ref = to_fetch[i];
 838                if (!*ref->name)
 839                        die("cannot fetch by sha1 over smart http");
 840                packet_buf_write(&preamble, "%s %s\n",
 841                                 oid_to_hex(&ref->old_oid), ref->name);
 842        }
 843        packet_buf_flush(&preamble);
 844
 845        memset(&rpc, 0, sizeof(rpc));
 846        rpc.service_name = "git-upload-pack",
 847        rpc.argv = args.argv;
 848        rpc.stdin_preamble = &preamble;
 849        rpc.gzip_request = 1;
 850
 851        err = rpc_service(&rpc, heads);
 852        if (rpc.result.len)
 853                write_or_die(1, rpc.result.buf, rpc.result.len);
 854        strbuf_release(&rpc.result);
 855        strbuf_release(&preamble);
 856        argv_array_clear(&args);
 857        return err;
 858}
 859
 860static int fetch(int nr_heads, struct ref **to_fetch)
 861{
 862        struct discovery *d = discover_refs("git-upload-pack", 0);
 863        if (d->proto_git)
 864                return fetch_git(d, nr_heads, to_fetch);
 865        else
 866                return fetch_dumb(nr_heads, to_fetch);
 867}
 868
 869static void parse_fetch(struct strbuf *buf)
 870{
 871        struct ref **to_fetch = NULL;
 872        struct ref *list_head = NULL;
 873        struct ref **list = &list_head;
 874        int alloc_heads = 0, nr_heads = 0;
 875
 876        do {
 877                const char *p;
 878                if (skip_prefix(buf->buf, "fetch ", &p)) {
 879                        const char *name;
 880                        struct ref *ref;
 881                        struct object_id old_oid;
 882
 883                        if (get_oid_hex(p, &old_oid))
 884                                die("protocol error: expected sha/ref, got %s'", p);
 885                        if (p[GIT_SHA1_HEXSZ] == ' ')
 886                                name = p + GIT_SHA1_HEXSZ + 1;
 887                        else if (!p[GIT_SHA1_HEXSZ])
 888                                name = "";
 889                        else
 890                                die("protocol error: expected sha/ref, got %s'", p);
 891
 892                        ref = alloc_ref(name);
 893                        oidcpy(&ref->old_oid, &old_oid);
 894
 895                        *list = ref;
 896                        list = &ref->next;
 897
 898                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 899                        to_fetch[nr_heads++] = ref;
 900                }
 901                else
 902                        die("http transport does not support %s", buf->buf);
 903
 904                strbuf_reset(buf);
 905                if (strbuf_getline_lf(buf, stdin) == EOF)
 906                        return;
 907                if (!*buf->buf)
 908                        break;
 909        } while (1);
 910
 911        if (fetch(nr_heads, to_fetch))
 912                exit(128); /* error already reported */
 913        free_refs(list_head);
 914        free(to_fetch);
 915
 916        printf("\n");
 917        fflush(stdout);
 918        strbuf_reset(buf);
 919}
 920
 921static int push_dav(int nr_spec, char **specs)
 922{
 923        struct child_process child = CHILD_PROCESS_INIT;
 924        size_t i;
 925
 926        child.git_cmd = 1;
 927        argv_array_push(&child.args, "http-push");
 928        argv_array_push(&child.args, "--helper-status");
 929        if (options.dry_run)
 930                argv_array_push(&child.args, "--dry-run");
 931        if (options.verbosity > 1)
 932                argv_array_push(&child.args, "--verbose");
 933        argv_array_push(&child.args, url.buf);
 934        for (i = 0; i < nr_spec; i++)
 935                argv_array_push(&child.args, specs[i]);
 936
 937        if (run_command(&child))
 938                die("git-http-push failed");
 939        return 0;
 940}
 941
 942static int push_git(struct discovery *heads, int nr_spec, char **specs)
 943{
 944        struct rpc_state rpc;
 945        int i, err;
 946        struct argv_array args;
 947        struct string_list_item *cas_option;
 948        struct strbuf preamble = STRBUF_INIT;
 949
 950        argv_array_init(&args);
 951        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 952                         NULL);
 953
 954        if (options.thin)
 955                argv_array_push(&args, "--thin");
 956        if (options.dry_run)
 957                argv_array_push(&args, "--dry-run");
 958        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 959                argv_array_push(&args, "--signed=yes");
 960        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 961                argv_array_push(&args, "--signed=if-asked");
 962        if (options.verbosity == 0)
 963                argv_array_push(&args, "--quiet");
 964        else if (options.verbosity > 1)
 965                argv_array_push(&args, "--verbose");
 966        for (i = 0; i < options.push_options.nr; i++)
 967                argv_array_pushf(&args, "--push-option=%s",
 968                                 options.push_options.items[i].string);
 969        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 970        for_each_string_list_item(cas_option, &cas_options)
 971                argv_array_push(&args, cas_option->string);
 972        argv_array_push(&args, url.buf);
 973
 974        argv_array_push(&args, "--stdin");
 975        for (i = 0; i < nr_spec; i++)
 976                packet_buf_write(&preamble, "%s\n", specs[i]);
 977        packet_buf_flush(&preamble);
 978
 979        memset(&rpc, 0, sizeof(rpc));
 980        rpc.service_name = "git-receive-pack",
 981        rpc.argv = args.argv;
 982        rpc.stdin_preamble = &preamble;
 983
 984        err = rpc_service(&rpc, heads);
 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 push(int nr_spec, char **specs)
 994{
 995        struct discovery *heads = discover_refs("git-receive-pack", 1);
 996        int ret;
 997
 998        if (heads->proto_git)
 999                ret = push_git(heads, nr_spec, specs);
1000        else
1001                ret = push_dav(nr_spec, specs);
1002        free_discovery(heads);
1003        return ret;
1004}
1005
1006static void parse_push(struct strbuf *buf)
1007{
1008        char **specs = NULL;
1009        int alloc_spec = 0, nr_spec = 0, i, ret;
1010
1011        do {
1012                if (starts_with(buf->buf, "push ")) {
1013                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1014                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1015                }
1016                else
1017                        die("http transport does not support %s", buf->buf);
1018
1019                strbuf_reset(buf);
1020                if (strbuf_getline_lf(buf, stdin) == EOF)
1021                        goto free_specs;
1022                if (!*buf->buf)
1023                        break;
1024        } while (1);
1025
1026        ret = push(nr_spec, specs);
1027        printf("\n");
1028        fflush(stdout);
1029
1030        if (ret)
1031                exit(128); /* error already reported */
1032
1033 free_specs:
1034        for (i = 0; i < nr_spec; i++)
1035                free(specs[i]);
1036        free(specs);
1037}
1038
1039int cmd_main(int argc, const char **argv)
1040{
1041        struct strbuf buf = STRBUF_INIT;
1042        int nongit;
1043
1044        setup_git_directory_gently(&nongit);
1045        if (argc < 2) {
1046                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1047                return 1;
1048        }
1049
1050        options.verbosity = 1;
1051        options.progress = !!isatty(2);
1052        options.thin = 1;
1053        string_list_init(&options.deepen_not, 1);
1054        string_list_init(&options.push_options, 1);
1055
1056        remote = remote_get(argv[1]);
1057
1058        if (argc > 2) {
1059                end_url_with_slash(&url, argv[2]);
1060        } else {
1061                end_url_with_slash(&url, remote->url[0]);
1062        }
1063
1064        http_init(remote, url.buf, 0);
1065
1066        do {
1067                const char *arg;
1068
1069                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1070                        if (ferror(stdin))
1071                                error("remote-curl: error reading command stream from git");
1072                        return 1;
1073                }
1074                if (buf.len == 0)
1075                        break;
1076                if (starts_with(buf.buf, "fetch ")) {
1077                        if (nongit)
1078                                die("remote-curl: fetch attempted without a local repo");
1079                        parse_fetch(&buf);
1080
1081                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1082                        int for_push = !!strstr(buf.buf + 4, "for-push");
1083                        output_refs(get_refs(for_push));
1084
1085                } else if (starts_with(buf.buf, "push ")) {
1086                        parse_push(&buf);
1087
1088                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1089                        char *value = strchr(arg, ' ');
1090                        int result;
1091
1092                        if (value)
1093                                *value++ = '\0';
1094                        else
1095                                value = "true";
1096
1097                        result = set_option(arg, value);
1098                        if (!result)
1099                                printf("ok\n");
1100                        else if (result < 0)
1101                                printf("error invalid value\n");
1102                        else
1103                                printf("unsupported\n");
1104                        fflush(stdout);
1105
1106                } else if (!strcmp(buf.buf, "capabilities")) {
1107                        printf("fetch\n");
1108                        printf("option\n");
1109                        printf("push\n");
1110                        printf("check-connectivity\n");
1111                        printf("\n");
1112                        fflush(stdout);
1113                } else {
1114                        error("remote-curl: unknown command '%s' from git", buf.buf);
1115                        return 1;
1116                }
1117                strbuf_reset(&buf);
1118        } while (1);
1119
1120        http_cleanup();
1121
1122        return 0;
1123}