Andrew's git / gitweb.git / remote-curl.c
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remote-curl.con commit Merge branch 'gs/test-unset-xdg-cache-home' (ba5f3fc)
   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
  17static struct remote *remote;
  18/* always ends with a trailing slash */
  19static struct strbuf url = STRBUF_INIT;
  20
  21struct options {
  22        int verbosity;
  23        unsigned long depth;
  24        char *deepen_since;
  25        struct string_list deepen_not;
  26        struct string_list push_options;
  27        char *filter;
  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                from_promisor : 1,
  39                no_dependents : 1;
  40};
  41static struct options options;
  42static struct string_list cas_options = STRING_LIST_INIT_DUP;
  43
  44static int set_option(const char *name, const char *value)
  45{
  46        if (!strcmp(name, "verbosity")) {
  47                char *end;
  48                int v = strtol(value, &end, 10);
  49                if (value == end || *end)
  50                        return -1;
  51                options.verbosity = v;
  52                return 0;
  53        }
  54        else if (!strcmp(name, "progress")) {
  55                if (!strcmp(value, "true"))
  56                        options.progress = 1;
  57                else if (!strcmp(value, "false"))
  58                        options.progress = 0;
  59                else
  60                        return -1;
  61                return 0;
  62        }
  63        else if (!strcmp(name, "depth")) {
  64                char *end;
  65                unsigned long v = strtoul(value, &end, 10);
  66                if (value == end || *end)
  67                        return -1;
  68                options.depth = v;
  69                return 0;
  70        }
  71        else if (!strcmp(name, "deepen-since")) {
  72                options.deepen_since = xstrdup(value);
  73                return 0;
  74        }
  75        else if (!strcmp(name, "deepen-not")) {
  76                string_list_append(&options.deepen_not, value);
  77                return 0;
  78        }
  79        else if (!strcmp(name, "deepen-relative")) {
  80                if (!strcmp(value, "true"))
  81                        options.deepen_relative = 1;
  82                else if (!strcmp(value, "false"))
  83                        options.deepen_relative = 0;
  84                else
  85                        return -1;
  86                return 0;
  87        }
  88        else if (!strcmp(name, "followtags")) {
  89                if (!strcmp(value, "true"))
  90                        options.followtags = 1;
  91                else if (!strcmp(value, "false"))
  92                        options.followtags = 0;
  93                else
  94                        return -1;
  95                return 0;
  96        }
  97        else if (!strcmp(name, "dry-run")) {
  98                if (!strcmp(value, "true"))
  99                        options.dry_run = 1;
 100                else if (!strcmp(value, "false"))
 101                        options.dry_run = 0;
 102                else
 103                        return -1;
 104                return 0;
 105        }
 106        else if (!strcmp(name, "check-connectivity")) {
 107                if (!strcmp(value, "true"))
 108                        options.check_self_contained_and_connected = 1;
 109                else if (!strcmp(value, "false"))
 110                        options.check_self_contained_and_connected = 0;
 111                else
 112                        return -1;
 113                return 0;
 114        }
 115        else if (!strcmp(name, "cas")) {
 116                struct strbuf val = STRBUF_INIT;
 117                strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
 118                string_list_append(&cas_options, val.buf);
 119                strbuf_release(&val);
 120                return 0;
 121        } else if (!strcmp(name, "cloning")) {
 122                if (!strcmp(value, "true"))
 123                        options.cloning = 1;
 124                else if (!strcmp(value, "false"))
 125                        options.cloning = 0;
 126                else
 127                        return -1;
 128                return 0;
 129        } else if (!strcmp(name, "update-shallow")) {
 130                if (!strcmp(value, "true"))
 131                        options.update_shallow = 1;
 132                else if (!strcmp(value, "false"))
 133                        options.update_shallow = 0;
 134                else
 135                        return -1;
 136                return 0;
 137        } else if (!strcmp(name, "pushcert")) {
 138                if (!strcmp(value, "true"))
 139                        options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 140                else if (!strcmp(value, "false"))
 141                        options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 142                else if (!strcmp(value, "if-asked"))
 143                        options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 144                else
 145                        return -1;
 146                return 0;
 147        } else if (!strcmp(name, "push-option")) {
 148                string_list_append(&options.push_options, value);
 149                return 0;
 150
 151#if LIBCURL_VERSION_NUM >= 0x070a08
 152        } else if (!strcmp(name, "family")) {
 153                if (!strcmp(value, "ipv4"))
 154                        git_curl_ipresolve = CURL_IPRESOLVE_V4;
 155                else if (!strcmp(value, "ipv6"))
 156                        git_curl_ipresolve = CURL_IPRESOLVE_V6;
 157                else if (!strcmp(value, "all"))
 158                        git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
 159                else
 160                        return -1;
 161                return 0;
 162#endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
 163        } else if (!strcmp(name, "from-promisor")) {
 164                options.from_promisor = 1;
 165                return 0;
 166        } else if (!strcmp(name, "no-dependents")) {
 167                options.no_dependents = 1;
 168                return 0;
 169        } else if (!strcmp(name, "filter")) {
 170                options.filter = xstrdup(value);;
 171                return 0;
 172        } else {
 173                return 1 /* unsupported */;
 174        }
 175}
 176
 177struct discovery {
 178        const char *service;
 179        char *buf_alloc;
 180        char *buf;
 181        size_t len;
 182        struct ref *refs;
 183        struct oid_array shallow;
 184        unsigned proto_git : 1;
 185};
 186static struct discovery *last_discovery;
 187
 188static struct ref *parse_git_refs(struct discovery *heads, int for_push)
 189{
 190        struct ref *list = NULL;
 191        get_remote_heads(-1, heads->buf, heads->len, &list,
 192                         for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
 193        return list;
 194}
 195
 196static struct ref *parse_info_refs(struct discovery *heads)
 197{
 198        char *data, *start, *mid;
 199        char *ref_name;
 200        int i = 0;
 201
 202        struct ref *refs = NULL;
 203        struct ref *ref = NULL;
 204        struct ref *last_ref = NULL;
 205
 206        data = heads->buf;
 207        start = NULL;
 208        mid = data;
 209        while (i < heads->len) {
 210                if (!start) {
 211                        start = &data[i];
 212                }
 213                if (data[i] == '\t')
 214                        mid = &data[i];
 215                if (data[i] == '\n') {
 216                        if (mid - start != 40)
 217                                die("%sinfo/refs not valid: is this a git repository?",
 218                                    url.buf);
 219                        data[i] = 0;
 220                        ref_name = mid + 1;
 221                        ref = alloc_ref(ref_name);
 222                        get_oid_hex(start, &ref->old_oid);
 223                        if (!refs)
 224                                refs = ref;
 225                        if (last_ref)
 226                                last_ref->next = ref;
 227                        last_ref = ref;
 228                        start = NULL;
 229                }
 230                i++;
 231        }
 232
 233        ref = alloc_ref("HEAD");
 234        if (!http_fetch_ref(url.buf, ref) &&
 235            !resolve_remote_symref(ref, refs)) {
 236                ref->next = refs;
 237                refs = ref;
 238        } else {
 239                free(ref);
 240        }
 241
 242        return refs;
 243}
 244
 245static void free_discovery(struct discovery *d)
 246{
 247        if (d) {
 248                if (d == last_discovery)
 249                        last_discovery = NULL;
 250                free(d->shallow.oid);
 251                free(d->buf_alloc);
 252                free_refs(d->refs);
 253                free(d);
 254        }
 255}
 256
 257static int show_http_message(struct strbuf *type, struct strbuf *charset,
 258                             struct strbuf *msg)
 259{
 260        const char *p, *eol;
 261
 262        /*
 263         * We only show text/plain parts, as other types are likely
 264         * to be ugly to look at on the user's terminal.
 265         */
 266        if (strcmp(type->buf, "text/plain"))
 267                return -1;
 268        if (charset->len)
 269                strbuf_reencode(msg, charset->buf, get_log_output_encoding());
 270
 271        strbuf_trim(msg);
 272        if (!msg->len)
 273                return -1;
 274
 275        p = msg->buf;
 276        do {
 277                eol = strchrnul(p, '\n');
 278                fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
 279                p = eol + 1;
 280        } while(*eol);
 281        return 0;
 282}
 283
 284static struct discovery *discover_refs(const char *service, int for_push)
 285{
 286        struct strbuf exp = STRBUF_INIT;
 287        struct strbuf type = STRBUF_INIT;
 288        struct strbuf charset = STRBUF_INIT;
 289        struct strbuf buffer = STRBUF_INIT;
 290        struct strbuf refs_url = STRBUF_INIT;
 291        struct strbuf effective_url = STRBUF_INIT;
 292        struct discovery *last = last_discovery;
 293        int http_ret, maybe_smart = 0;
 294        struct http_get_options http_options;
 295
 296        if (last && !strcmp(service, last->service))
 297                return last;
 298        free_discovery(last);
 299
 300        strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
 301        if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 302             git_env_bool("GIT_SMART_HTTP", 1)) {
 303                maybe_smart = 1;
 304                if (!strchr(url.buf, '?'))
 305                        strbuf_addch(&refs_url, '?');
 306                else
 307                        strbuf_addch(&refs_url, '&');
 308                strbuf_addf(&refs_url, "service=%s", service);
 309        }
 310
 311        memset(&http_options, 0, sizeof(http_options));
 312        http_options.content_type = &type;
 313        http_options.charset = &charset;
 314        http_options.effective_url = &effective_url;
 315        http_options.base_url = &url;
 316        http_options.initial_request = 1;
 317        http_options.no_cache = 1;
 318        http_options.keep_error = 1;
 319
 320        http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
 321        switch (http_ret) {
 322        case HTTP_OK:
 323                break;
 324        case HTTP_MISSING_TARGET:
 325                show_http_message(&type, &charset, &buffer);
 326                die("repository '%s' not found", url.buf);
 327        case HTTP_NOAUTH:
 328                show_http_message(&type, &charset, &buffer);
 329                die("Authentication failed for '%s'", url.buf);
 330        default:
 331                show_http_message(&type, &charset, &buffer);
 332                die("unable to access '%s': %s", url.buf, curl_errorstr);
 333        }
 334
 335        if (options.verbosity && !starts_with(refs_url.buf, url.buf))
 336                warning(_("redirecting to %s"), url.buf);
 337
 338        last= xcalloc(1, sizeof(*last_discovery));
 339        last->service = service;
 340        last->buf_alloc = strbuf_detach(&buffer, &last->len);
 341        last->buf = last->buf_alloc;
 342
 343        strbuf_addf(&exp, "application/x-%s-advertisement", service);
 344        if (maybe_smart &&
 345            (5 <= last->len && last->buf[4] == '#') &&
 346            !strbuf_cmp(&exp, &type)) {
 347                char *line;
 348
 349                /*
 350                 * smart HTTP response; validate that the service
 351                 * pkt-line matches our request.
 352                 */
 353                line = packet_read_line_buf(&last->buf, &last->len, NULL);
 354                if (!line)
 355                        die("invalid server response; expected service, got flush packet");
 356
 357                strbuf_reset(&exp);
 358                strbuf_addf(&exp, "# service=%s", service);
 359                if (strcmp(line, exp.buf))
 360                        die("invalid server response; got '%s'", line);
 361                strbuf_release(&exp);
 362
 363                /* The header can include additional metadata lines, up
 364                 * until a packet flush marker.  Ignore these now, but
 365                 * in the future we might start to scan them.
 366                 */
 367                while (packet_read_line_buf(&last->buf, &last->len, NULL))
 368                        ;
 369
 370                last->proto_git = 1;
 371        }
 372
 373        if (last->proto_git)
 374                last->refs = parse_git_refs(last, for_push);
 375        else
 376                last->refs = parse_info_refs(last);
 377
 378        strbuf_release(&refs_url);
 379        strbuf_release(&exp);
 380        strbuf_release(&type);
 381        strbuf_release(&charset);
 382        strbuf_release(&effective_url);
 383        strbuf_release(&buffer);
 384        last_discovery = last;
 385        return last;
 386}
 387
 388static struct ref *get_refs(int for_push)
 389{
 390        struct discovery *heads;
 391
 392        if (for_push)
 393                heads = discover_refs("git-receive-pack", for_push);
 394        else
 395                heads = discover_refs("git-upload-pack", for_push);
 396
 397        return heads->refs;
 398}
 399
 400static void output_refs(struct ref *refs)
 401{
 402        struct ref *posn;
 403        for (posn = refs; posn; posn = posn->next) {
 404                if (posn->symref)
 405                        printf("@%s %s\n", posn->symref, posn->name);
 406                else
 407                        printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
 408        }
 409        printf("\n");
 410        fflush(stdout);
 411}
 412
 413struct rpc_state {
 414        const char *service_name;
 415        const char **argv;
 416        struct strbuf *stdin_preamble;
 417        char *service_url;
 418        char *hdr_content_type;
 419        char *hdr_accept;
 420        char *buf;
 421        size_t alloc;
 422        size_t len;
 423        size_t pos;
 424        int in;
 425        int out;
 426        int any_written;
 427        struct strbuf result;
 428        unsigned gzip_request : 1;
 429        unsigned initial_buffer : 1;
 430};
 431
 432static size_t rpc_out(void *ptr, size_t eltsize,
 433                size_t nmemb, void *buffer_)
 434{
 435        size_t max = eltsize * nmemb;
 436        struct rpc_state *rpc = buffer_;
 437        size_t avail = rpc->len - rpc->pos;
 438
 439        if (!avail) {
 440                rpc->initial_buffer = 0;
 441                avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 442                if (!avail)
 443                        return 0;
 444                rpc->pos = 0;
 445                rpc->len = avail;
 446        }
 447
 448        if (max < avail)
 449                avail = max;
 450        memcpy(ptr, rpc->buf + rpc->pos, avail);
 451        rpc->pos += avail;
 452        return avail;
 453}
 454
 455#ifndef NO_CURL_IOCTL
 456static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 457{
 458        struct rpc_state *rpc = clientp;
 459
 460        switch (cmd) {
 461        case CURLIOCMD_NOP:
 462                return CURLIOE_OK;
 463
 464        case CURLIOCMD_RESTARTREAD:
 465                if (rpc->initial_buffer) {
 466                        rpc->pos = 0;
 467                        return CURLIOE_OK;
 468                }
 469                error("unable to rewind rpc post data - try increasing http.postBuffer");
 470                return CURLIOE_FAILRESTART;
 471
 472        default:
 473                return CURLIOE_UNKNOWNCMD;
 474        }
 475}
 476#endif
 477
 478static size_t rpc_in(char *ptr, size_t eltsize,
 479                size_t nmemb, void *buffer_)
 480{
 481        size_t size = eltsize * nmemb;
 482        struct rpc_state *rpc = buffer_;
 483        if (size)
 484                rpc->any_written = 1;
 485        write_or_die(rpc->in, ptr, size);
 486        return size;
 487}
 488
 489static int run_slot(struct active_request_slot *slot,
 490                    struct slot_results *results)
 491{
 492        int err;
 493        struct slot_results results_buf;
 494
 495        if (!results)
 496                results = &results_buf;
 497
 498        err = run_one_slot(slot, results);
 499
 500        if (err != HTTP_OK && err != HTTP_REAUTH) {
 501                struct strbuf msg = STRBUF_INIT;
 502                if (results->http_code && results->http_code != 200)
 503                        strbuf_addf(&msg, "HTTP %ld", results->http_code);
 504                if (results->curl_result != CURLE_OK) {
 505                        if (msg.len)
 506                                strbuf_addch(&msg, ' ');
 507                        strbuf_addf(&msg, "curl %d", results->curl_result);
 508                        if (curl_errorstr[0]) {
 509                                strbuf_addch(&msg, ' ');
 510                                strbuf_addstr(&msg, curl_errorstr);
 511                        }
 512                }
 513                error("RPC failed; %s", msg.buf);
 514                strbuf_release(&msg);
 515        }
 516
 517        return err;
 518}
 519
 520static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 521{
 522        struct active_request_slot *slot;
 523        struct curl_slist *headers = http_copy_default_headers();
 524        struct strbuf buf = STRBUF_INIT;
 525        int err;
 526
 527        slot = get_active_slot();
 528
 529        headers = curl_slist_append(headers, rpc->hdr_content_type);
 530        headers = curl_slist_append(headers, rpc->hdr_accept);
 531
 532        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 533        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 534        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 535        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
 536        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
 537        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
 538        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 539        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 540        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 541
 542        err = run_slot(slot, results);
 543
 544        curl_slist_free_all(headers);
 545        strbuf_release(&buf);
 546        return err;
 547}
 548
 549static curl_off_t xcurl_off_t(ssize_t len) {
 550        if (len > maximum_signed_value_of_type(curl_off_t))
 551                die("cannot handle pushes this big");
 552        return (curl_off_t) len;
 553}
 554
 555static int post_rpc(struct rpc_state *rpc)
 556{
 557        struct active_request_slot *slot;
 558        struct curl_slist *headers = http_copy_default_headers();
 559        int use_gzip = rpc->gzip_request;
 560        char *gzip_body = NULL;
 561        size_t gzip_size = 0;
 562        int err, large_request = 0;
 563        int needs_100_continue = 0;
 564
 565        /* Try to load the entire request, if we can fit it into the
 566         * allocated buffer space we can use HTTP/1.0 and avoid the
 567         * chunked encoding mess.
 568         */
 569        while (1) {
 570                size_t left = rpc->alloc - rpc->len;
 571                char *buf = rpc->buf + rpc->len;
 572                int n;
 573
 574                if (left < LARGE_PACKET_MAX) {
 575                        large_request = 1;
 576                        use_gzip = 0;
 577                        break;
 578                }
 579
 580                n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 581                if (!n)
 582                        break;
 583                rpc->len += n;
 584        }
 585
 586        if (large_request) {
 587                struct slot_results results;
 588
 589                do {
 590                        err = probe_rpc(rpc, &results);
 591                        if (err == HTTP_REAUTH)
 592                                credential_fill(&http_auth);
 593                } while (err == HTTP_REAUTH);
 594                if (err != HTTP_OK)
 595                        return -1;
 596
 597                if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
 598                        needs_100_continue = 1;
 599        }
 600
 601        headers = curl_slist_append(headers, rpc->hdr_content_type);
 602        headers = curl_slist_append(headers, rpc->hdr_accept);
 603        headers = curl_slist_append(headers, needs_100_continue ?
 604                "Expect: 100-continue" : "Expect:");
 605
 606retry:
 607        slot = get_active_slot();
 608
 609        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 610        curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
 611        curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
 612        curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
 613
 614        if (large_request) {
 615                /* The request body is large and the size cannot be predicted.
 616                 * We must use chunked encoding to send it.
 617                 */
 618                headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
 619                rpc->initial_buffer = 1;
 620                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 621                curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
 622#ifndef NO_CURL_IOCTL
 623                curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
 624                curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
 625#endif
 626                if (options.verbosity > 1) {
 627                        fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 628                        fflush(stderr);
 629                }
 630
 631        } else if (gzip_body) {
 632                /*
 633                 * If we are looping to retry authentication, then the previous
 634                 * run will have set up the headers and gzip buffer already,
 635                 * and we just need to send it.
 636                 */
 637                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 638                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 639
 640        } else if (use_gzip && 1024 < rpc->len) {
 641                /* The client backend isn't giving us compressed data so
 642                 * we can try to deflate it ourselves, this may save on.
 643                 * the transfer time.
 644                 */
 645                git_zstream stream;
 646                int ret;
 647
 648                git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
 649                gzip_size = git_deflate_bound(&stream, rpc->len);
 650                gzip_body = xmalloc(gzip_size);
 651
 652                stream.next_in = (unsigned char *)rpc->buf;
 653                stream.avail_in = rpc->len;
 654                stream.next_out = (unsigned char *)gzip_body;
 655                stream.avail_out = gzip_size;
 656
 657                ret = git_deflate(&stream, Z_FINISH);
 658                if (ret != Z_STREAM_END)
 659                        die("cannot deflate request; zlib deflate error %d", ret);
 660
 661                ret = git_deflate_end_gently(&stream);
 662                if (ret != Z_OK)
 663                        die("cannot deflate request; zlib end error %d", ret);
 664
 665                gzip_size = stream.total_out;
 666
 667                headers = curl_slist_append(headers, "Content-Encoding: gzip");
 668                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
 669                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
 670
 671                if (options.verbosity > 1) {
 672                        fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
 673                                rpc->service_name,
 674                                (unsigned long)rpc->len, (unsigned long)gzip_size);
 675                        fflush(stderr);
 676                }
 677        } else {
 678                /* We know the complete request size in advance, use the
 679                 * more normal Content-Length approach.
 680                 */
 681                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
 682                curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
 683                if (options.verbosity > 1) {
 684                        fprintf(stderr, "POST %s (%lu bytes)\n",
 685                                rpc->service_name, (unsigned long)rpc->len);
 686                        fflush(stderr);
 687                }
 688        }
 689
 690        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 691        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 692        curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 693
 694
 695        rpc->any_written = 0;
 696        err = run_slot(slot, NULL);
 697        if (err == HTTP_REAUTH && !large_request) {
 698                credential_fill(&http_auth);
 699                goto retry;
 700        }
 701        if (err != HTTP_OK)
 702                err = -1;
 703
 704        if (!rpc->any_written)
 705                err = -1;
 706
 707        curl_slist_free_all(headers);
 708        free(gzip_body);
 709        return err;
 710}
 711
 712static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 713{
 714        const char *svc = rpc->service_name;
 715        struct strbuf buf = STRBUF_INIT;
 716        struct strbuf *preamble = rpc->stdin_preamble;
 717        struct child_process client = CHILD_PROCESS_INIT;
 718        int err = 0;
 719
 720        client.in = -1;
 721        client.out = -1;
 722        client.git_cmd = 1;
 723        client.argv = rpc->argv;
 724        if (start_command(&client))
 725                exit(1);
 726        if (preamble)
 727                write_or_die(client.in, preamble->buf, preamble->len);
 728        if (heads)
 729                write_or_die(client.in, heads->buf, heads->len);
 730
 731        rpc->alloc = http_post_buffer;
 732        rpc->buf = xmalloc(rpc->alloc);
 733        rpc->in = client.in;
 734        rpc->out = client.out;
 735        strbuf_init(&rpc->result, 0);
 736
 737        strbuf_addf(&buf, "%s%s", url.buf, svc);
 738        rpc->service_url = strbuf_detach(&buf, NULL);
 739
 740        strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
 741        rpc->hdr_content_type = strbuf_detach(&buf, NULL);
 742
 743        strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
 744        rpc->hdr_accept = strbuf_detach(&buf, NULL);
 745
 746        while (!err) {
 747                int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 748                if (!n)
 749                        break;
 750                rpc->pos = 0;
 751                rpc->len = n;
 752                err |= post_rpc(rpc);
 753        }
 754
 755        close(client.in);
 756        client.in = -1;
 757        if (!err) {
 758                strbuf_read(&rpc->result, client.out, 0);
 759        } else {
 760                char buf[4096];
 761                for (;;)
 762                        if (xread(client.out, buf, sizeof(buf)) <= 0)
 763                                break;
 764        }
 765
 766        close(client.out);
 767        client.out = -1;
 768
 769        err |= finish_command(&client);
 770        free(rpc->service_url);
 771        free(rpc->hdr_content_type);
 772        free(rpc->hdr_accept);
 773        free(rpc->buf);
 774        strbuf_release(&buf);
 775        return err;
 776}
 777
 778static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 779{
 780        struct walker *walker;
 781        char **targets;
 782        int ret, i;
 783
 784        ALLOC_ARRAY(targets, nr_heads);
 785        if (options.depth || options.deepen_since)
 786                die("dumb http transport does not support shallow capabilities");
 787        for (i = 0; i < nr_heads; i++)
 788                targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
 789
 790        walker = get_http_walker(url.buf);
 791        walker->get_all = 1;
 792        walker->get_tree = 1;
 793        walker->get_history = 1;
 794        walker->get_verbosely = options.verbosity >= 3;
 795        walker->get_recover = 0;
 796        ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
 797        walker_free(walker);
 798
 799        for (i = 0; i < nr_heads; i++)
 800                free(targets[i]);
 801        free(targets);
 802
 803        return ret ? error("fetch failed.") : 0;
 804}
 805
 806static int fetch_git(struct discovery *heads,
 807        int nr_heads, struct ref **to_fetch)
 808{
 809        struct rpc_state rpc;
 810        struct strbuf preamble = STRBUF_INIT;
 811        int i, err;
 812        struct argv_array args = ARGV_ARRAY_INIT;
 813
 814        argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
 815                         "--stdin", "--lock-pack", NULL);
 816        if (options.followtags)
 817                argv_array_push(&args, "--include-tag");
 818        if (options.thin)
 819                argv_array_push(&args, "--thin");
 820        if (options.verbosity >= 3)
 821                argv_array_pushl(&args, "-v", "-v", NULL);
 822        if (options.check_self_contained_and_connected)
 823                argv_array_push(&args, "--check-self-contained-and-connected");
 824        if (options.cloning)
 825                argv_array_push(&args, "--cloning");
 826        if (options.update_shallow)
 827                argv_array_push(&args, "--update-shallow");
 828        if (!options.progress)
 829                argv_array_push(&args, "--no-progress");
 830        if (options.depth)
 831                argv_array_pushf(&args, "--depth=%lu", options.depth);
 832        if (options.deepen_since)
 833                argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
 834        for (i = 0; i < options.deepen_not.nr; i++)
 835                argv_array_pushf(&args, "--shallow-exclude=%s",
 836                                 options.deepen_not.items[i].string);
 837        if (options.deepen_relative && options.depth)
 838                argv_array_push(&args, "--deepen-relative");
 839        if (options.from_promisor)
 840                argv_array_push(&args, "--from-promisor");
 841        if (options.no_dependents)
 842                argv_array_push(&args, "--no-dependents");
 843        if (options.filter)
 844                argv_array_pushf(&args, "--filter=%s", options.filter);
 845        argv_array_push(&args, url.buf);
 846
 847        for (i = 0; i < nr_heads; i++) {
 848                struct ref *ref = to_fetch[i];
 849                if (!*ref->name)
 850                        die("cannot fetch by sha1 over smart http");
 851                packet_buf_write(&preamble, "%s %s\n",
 852                                 oid_to_hex(&ref->old_oid), ref->name);
 853        }
 854        packet_buf_flush(&preamble);
 855
 856        memset(&rpc, 0, sizeof(rpc));
 857        rpc.service_name = "git-upload-pack",
 858        rpc.argv = args.argv;
 859        rpc.stdin_preamble = &preamble;
 860        rpc.gzip_request = 1;
 861
 862        err = rpc_service(&rpc, heads);
 863        if (rpc.result.len)
 864                write_or_die(1, rpc.result.buf, rpc.result.len);
 865        strbuf_release(&rpc.result);
 866        strbuf_release(&preamble);
 867        argv_array_clear(&args);
 868        return err;
 869}
 870
 871static int fetch(int nr_heads, struct ref **to_fetch)
 872{
 873        struct discovery *d = discover_refs("git-upload-pack", 0);
 874        if (d->proto_git)
 875                return fetch_git(d, nr_heads, to_fetch);
 876        else
 877                return fetch_dumb(nr_heads, to_fetch);
 878}
 879
 880static void parse_fetch(struct strbuf *buf)
 881{
 882        struct ref **to_fetch = NULL;
 883        struct ref *list_head = NULL;
 884        struct ref **list = &list_head;
 885        int alloc_heads = 0, nr_heads = 0;
 886
 887        do {
 888                const char *p;
 889                if (skip_prefix(buf->buf, "fetch ", &p)) {
 890                        const char *name;
 891                        struct ref *ref;
 892                        struct object_id old_oid;
 893
 894                        if (get_oid_hex(p, &old_oid))
 895                                die("protocol error: expected sha/ref, got %s'", p);
 896                        if (p[GIT_SHA1_HEXSZ] == ' ')
 897                                name = p + GIT_SHA1_HEXSZ + 1;
 898                        else if (!p[GIT_SHA1_HEXSZ])
 899                                name = "";
 900                        else
 901                                die("protocol error: expected sha/ref, got %s'", p);
 902
 903                        ref = alloc_ref(name);
 904                        oidcpy(&ref->old_oid, &old_oid);
 905
 906                        *list = ref;
 907                        list = &ref->next;
 908
 909                        ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
 910                        to_fetch[nr_heads++] = ref;
 911                }
 912                else
 913                        die("http transport does not support %s", buf->buf);
 914
 915                strbuf_reset(buf);
 916                if (strbuf_getline_lf(buf, stdin) == EOF)
 917                        return;
 918                if (!*buf->buf)
 919                        break;
 920        } while (1);
 921
 922        if (fetch(nr_heads, to_fetch))
 923                exit(128); /* error already reported */
 924        free_refs(list_head);
 925        free(to_fetch);
 926
 927        printf("\n");
 928        fflush(stdout);
 929        strbuf_reset(buf);
 930}
 931
 932static int push_dav(int nr_spec, char **specs)
 933{
 934        struct child_process child = CHILD_PROCESS_INIT;
 935        size_t i;
 936
 937        child.git_cmd = 1;
 938        argv_array_push(&child.args, "http-push");
 939        argv_array_push(&child.args, "--helper-status");
 940        if (options.dry_run)
 941                argv_array_push(&child.args, "--dry-run");
 942        if (options.verbosity > 1)
 943                argv_array_push(&child.args, "--verbose");
 944        argv_array_push(&child.args, url.buf);
 945        for (i = 0; i < nr_spec; i++)
 946                argv_array_push(&child.args, specs[i]);
 947
 948        if (run_command(&child))
 949                die("git-http-push failed");
 950        return 0;
 951}
 952
 953static int push_git(struct discovery *heads, int nr_spec, char **specs)
 954{
 955        struct rpc_state rpc;
 956        int i, err;
 957        struct argv_array args;
 958        struct string_list_item *cas_option;
 959        struct strbuf preamble = STRBUF_INIT;
 960
 961        argv_array_init(&args);
 962        argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
 963                         NULL);
 964
 965        if (options.thin)
 966                argv_array_push(&args, "--thin");
 967        if (options.dry_run)
 968                argv_array_push(&args, "--dry-run");
 969        if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
 970                argv_array_push(&args, "--signed=yes");
 971        else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
 972                argv_array_push(&args, "--signed=if-asked");
 973        if (options.verbosity == 0)
 974                argv_array_push(&args, "--quiet");
 975        else if (options.verbosity > 1)
 976                argv_array_push(&args, "--verbose");
 977        for (i = 0; i < options.push_options.nr; i++)
 978                argv_array_pushf(&args, "--push-option=%s",
 979                                 options.push_options.items[i].string);
 980        argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
 981        for_each_string_list_item(cas_option, &cas_options)
 982                argv_array_push(&args, cas_option->string);
 983        argv_array_push(&args, url.buf);
 984
 985        argv_array_push(&args, "--stdin");
 986        for (i = 0; i < nr_spec; i++)
 987                packet_buf_write(&preamble, "%s\n", specs[i]);
 988        packet_buf_flush(&preamble);
 989
 990        memset(&rpc, 0, sizeof(rpc));
 991        rpc.service_name = "git-receive-pack",
 992        rpc.argv = args.argv;
 993        rpc.stdin_preamble = &preamble;
 994
 995        err = rpc_service(&rpc, heads);
 996        if (rpc.result.len)
 997                write_or_die(1, rpc.result.buf, rpc.result.len);
 998        strbuf_release(&rpc.result);
 999        strbuf_release(&preamble);
1000        argv_array_clear(&args);
1001        return err;
1002}
1003
1004static int push(int nr_spec, char **specs)
1005{
1006        struct discovery *heads = discover_refs("git-receive-pack", 1);
1007        int ret;
1008
1009        if (heads->proto_git)
1010                ret = push_git(heads, nr_spec, specs);
1011        else
1012                ret = push_dav(nr_spec, specs);
1013        free_discovery(heads);
1014        return ret;
1015}
1016
1017static void parse_push(struct strbuf *buf)
1018{
1019        char **specs = NULL;
1020        int alloc_spec = 0, nr_spec = 0, i, ret;
1021
1022        do {
1023                if (starts_with(buf->buf, "push ")) {
1024                        ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1025                        specs[nr_spec++] = xstrdup(buf->buf + 5);
1026                }
1027                else
1028                        die("http transport does not support %s", buf->buf);
1029
1030                strbuf_reset(buf);
1031                if (strbuf_getline_lf(buf, stdin) == EOF)
1032                        goto free_specs;
1033                if (!*buf->buf)
1034                        break;
1035        } while (1);
1036
1037        ret = push(nr_spec, specs);
1038        printf("\n");
1039        fflush(stdout);
1040
1041        if (ret)
1042                exit(128); /* error already reported */
1043
1044 free_specs:
1045        for (i = 0; i < nr_spec; i++)
1046                free(specs[i]);
1047        free(specs);
1048}
1049
1050int cmd_main(int argc, const char **argv)
1051{
1052        struct strbuf buf = STRBUF_INIT;
1053        int nongit;
1054
1055        setup_git_directory_gently(&nongit);
1056        if (argc < 2) {
1057                error("remote-curl: usage: git remote-curl <remote> [<url>]");
1058                return 1;
1059        }
1060
1061        options.verbosity = 1;
1062        options.progress = !!isatty(2);
1063        options.thin = 1;
1064        string_list_init(&options.deepen_not, 1);
1065        string_list_init(&options.push_options, 1);
1066
1067        remote = remote_get(argv[1]);
1068
1069        if (argc > 2) {
1070                end_url_with_slash(&url, argv[2]);
1071        } else {
1072                end_url_with_slash(&url, remote->url[0]);
1073        }
1074
1075        http_init(remote, url.buf, 0);
1076
1077        do {
1078                const char *arg;
1079
1080                if (strbuf_getline_lf(&buf, stdin) == EOF) {
1081                        if (ferror(stdin))
1082                                error("remote-curl: error reading command stream from git");
1083                        return 1;
1084                }
1085                if (buf.len == 0)
1086                        break;
1087                if (starts_with(buf.buf, "fetch ")) {
1088                        if (nongit)
1089                                die("remote-curl: fetch attempted without a local repo");
1090                        parse_fetch(&buf);
1091
1092                } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1093                        int for_push = !!strstr(buf.buf + 4, "for-push");
1094                        output_refs(get_refs(for_push));
1095
1096                } else if (starts_with(buf.buf, "push ")) {
1097                        parse_push(&buf);
1098
1099                } else if (skip_prefix(buf.buf, "option ", &arg)) {
1100                        char *value = strchr(arg, ' ');
1101                        int result;
1102
1103                        if (value)
1104                                *value++ = '\0';
1105                        else
1106                                value = "true";
1107
1108                        result = set_option(arg, value);
1109                        if (!result)
1110                                printf("ok\n");
1111                        else if (result < 0)
1112                                printf("error invalid value\n");
1113                        else
1114                                printf("unsupported\n");
1115                        fflush(stdout);
1116
1117                } else if (!strcmp(buf.buf, "capabilities")) {
1118                        printf("fetch\n");
1119                        printf("option\n");
1120                        printf("push\n");
1121                        printf("check-connectivity\n");
1122                        printf("\n");
1123                        fflush(stdout);
1124                } else {
1125                        error("remote-curl: unknown command '%s' from git", buf.buf);
1126                        return 1;
1127                }
1128                strbuf_reset(&buf);
1129        } while (1);
1130
1131        http_cleanup();
1132
1133        return 0;
1134}