9 #include "run-command.h"
11 #include "string-list.h"
13 #include "argv-array.h"
14 #include "credential.h"
15 #include "sha1-array.h"
16 #include "send-pack.h"
20 static struct remote *remote;
21 /* always ends with a trailing slash */
22 static struct strbuf url = STRBUF_INIT;
28 struct string_list deepen_not;
29 struct string_list push_options;
31 unsigned progress : 1,
32 check_self_contained_and_connected : 1,
38 /* One of the SEND_PACK_PUSH_CERT_* constants. */
44 static struct options options;
45 static struct string_list cas_options = STRING_LIST_INIT_DUP;
47 static int set_option(const char *name, const char *value)
49 if (!strcmp(name, "verbosity")) {
51 int v = strtol(value, &end, 10);
52 if (value == end || *end)
54 options.verbosity = v;
57 else if (!strcmp(name, "progress")) {
58 if (!strcmp(value, "true"))
60 else if (!strcmp(value, "false"))
66 else if (!strcmp(name, "depth")) {
68 unsigned long v = strtoul(value, &end, 10);
69 if (value == end || *end)
74 else if (!strcmp(name, "deepen-since")) {
75 options.deepen_since = xstrdup(value);
78 else if (!strcmp(name, "deepen-not")) {
79 string_list_append(&options.deepen_not, value);
82 else if (!strcmp(name, "deepen-relative")) {
83 if (!strcmp(value, "true"))
84 options.deepen_relative = 1;
85 else if (!strcmp(value, "false"))
86 options.deepen_relative = 0;
91 else if (!strcmp(name, "followtags")) {
92 if (!strcmp(value, "true"))
93 options.followtags = 1;
94 else if (!strcmp(value, "false"))
95 options.followtags = 0;
100 else if (!strcmp(name, "dry-run")) {
101 if (!strcmp(value, "true"))
103 else if (!strcmp(value, "false"))
109 else if (!strcmp(name, "check-connectivity")) {
110 if (!strcmp(value, "true"))
111 options.check_self_contained_and_connected = 1;
112 else if (!strcmp(value, "false"))
113 options.check_self_contained_and_connected = 0;
118 else if (!strcmp(name, "cas")) {
119 struct strbuf val = STRBUF_INIT;
120 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
121 string_list_append(&cas_options, val.buf);
122 strbuf_release(&val);
124 } else if (!strcmp(name, "cloning")) {
125 if (!strcmp(value, "true"))
127 else if (!strcmp(value, "false"))
132 } else if (!strcmp(name, "update-shallow")) {
133 if (!strcmp(value, "true"))
134 options.update_shallow = 1;
135 else if (!strcmp(value, "false"))
136 options.update_shallow = 0;
140 } else if (!strcmp(name, "pushcert")) {
141 if (!strcmp(value, "true"))
142 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
143 else if (!strcmp(value, "false"))
144 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
145 else if (!strcmp(value, "if-asked"))
146 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
150 } else if (!strcmp(name, "push-option")) {
152 string_list_append(&options.push_options, value);
154 struct strbuf unquoted = STRBUF_INIT;
155 if (unquote_c_style(&unquoted, value, NULL) < 0)
156 die("invalid quoting in push-option value");
157 string_list_append_nodup(&options.push_options,
158 strbuf_detach(&unquoted, NULL));
162 #if LIBCURL_VERSION_NUM >= 0x070a08
163 } else if (!strcmp(name, "family")) {
164 if (!strcmp(value, "ipv4"))
165 git_curl_ipresolve = CURL_IPRESOLVE_V4;
166 else if (!strcmp(value, "ipv6"))
167 git_curl_ipresolve = CURL_IPRESOLVE_V6;
168 else if (!strcmp(value, "all"))
169 git_curl_ipresolve = CURL_IPRESOLVE_WHATEVER;
173 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
174 } else if (!strcmp(name, "from-promisor")) {
175 options.from_promisor = 1;
177 } else if (!strcmp(name, "no-dependents")) {
178 options.no_dependents = 1;
180 } else if (!strcmp(name, "filter")) {
181 options.filter = xstrdup(value);
184 return 1 /* unsupported */;
194 struct oid_array shallow;
195 enum protocol_version version;
196 unsigned proto_git : 1;
198 static struct discovery *last_discovery;
200 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
202 struct ref *list = NULL;
203 struct packet_reader reader;
205 packet_reader_init(&reader, -1, heads->buf, heads->len,
206 PACKET_READ_CHOMP_NEWLINE |
207 PACKET_READ_GENTLE_ON_EOF);
209 heads->version = discover_version(&reader);
210 switch (heads->version) {
213 * Do nothing. This isn't a list of refs but rather a
214 * capability advertisement. Client would have run
215 * 'stateless-connect' so we'll dump this capability listing
216 * and let them request the refs themselves.
221 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
222 NULL, &heads->shallow);
224 case protocol_unknown_version:
225 BUG("unknown protocol version");
231 static struct ref *parse_info_refs(struct discovery *heads)
233 char *data, *start, *mid;
237 struct ref *refs = NULL;
238 struct ref *ref = NULL;
239 struct ref *last_ref = NULL;
244 while (i < heads->len) {
250 if (data[i] == '\n') {
251 if (mid - start != 40)
252 die("%sinfo/refs not valid: is this a git repository?",
256 ref = alloc_ref(ref_name);
257 get_oid_hex(start, &ref->old_oid);
261 last_ref->next = ref;
268 ref = alloc_ref("HEAD");
269 if (!http_fetch_ref(url.buf, ref) &&
270 !resolve_remote_symref(ref, refs)) {
280 static void free_discovery(struct discovery *d)
283 if (d == last_discovery)
284 last_discovery = NULL;
285 free(d->shallow.oid);
293 static int show_http_message(struct strbuf *type, struct strbuf *charset,
299 * We only show text/plain parts, as other types are likely
300 * to be ugly to look at on the user's terminal.
302 if (strcmp(type->buf, "text/plain"))
305 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
313 eol = strchrnul(p, '\n');
314 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
320 static int get_protocol_http_header(enum protocol_version version,
321 struct strbuf *header)
324 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
333 static struct discovery *discover_refs(const char *service, int for_push)
335 struct strbuf exp = STRBUF_INIT;
336 struct strbuf type = STRBUF_INIT;
337 struct strbuf charset = STRBUF_INIT;
338 struct strbuf buffer = STRBUF_INIT;
339 struct strbuf refs_url = STRBUF_INIT;
340 struct strbuf effective_url = STRBUF_INIT;
341 struct strbuf protocol_header = STRBUF_INIT;
342 struct string_list extra_headers = STRING_LIST_INIT_DUP;
343 struct discovery *last = last_discovery;
344 int http_ret, maybe_smart = 0;
345 struct http_get_options http_options;
346 enum protocol_version version = get_protocol_version_config();
348 if (last && !strcmp(service, last->service))
350 free_discovery(last);
352 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
353 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
354 git_env_bool("GIT_SMART_HTTP", 1)) {
356 if (!strchr(url.buf, '?'))
357 strbuf_addch(&refs_url, '?');
359 strbuf_addch(&refs_url, '&');
360 strbuf_addf(&refs_url, "service=%s", service);
364 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
365 * to perform a push, then fallback to v0 since the client doesn't know
366 * how to push yet using v2.
368 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
369 version = protocol_v0;
371 /* Add the extra Git-Protocol header */
372 if (get_protocol_http_header(version, &protocol_header))
373 string_list_append(&extra_headers, protocol_header.buf);
375 memset(&http_options, 0, sizeof(http_options));
376 http_options.content_type = &type;
377 http_options.charset = &charset;
378 http_options.effective_url = &effective_url;
379 http_options.base_url = &url;
380 http_options.extra_headers = &extra_headers;
381 http_options.initial_request = 1;
382 http_options.no_cache = 1;
384 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
388 case HTTP_MISSING_TARGET:
389 show_http_message(&type, &charset, &buffer);
390 die("repository '%s' not found", url.buf);
392 show_http_message(&type, &charset, &buffer);
393 die("Authentication failed for '%s'", url.buf);
395 show_http_message(&type, &charset, &buffer);
396 die("unable to access '%s': %s", url.buf, curl_errorstr);
399 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
400 warning(_("redirecting to %s"), url.buf);
402 last= xcalloc(1, sizeof(*last_discovery));
403 last->service = xstrdup(service);
404 last->buf_alloc = strbuf_detach(&buffer, &last->len);
405 last->buf = last->buf_alloc;
407 strbuf_addf(&exp, "application/x-%s-advertisement", service);
409 (5 <= last->len && last->buf[4] == '#') &&
410 !strbuf_cmp(&exp, &type)) {
414 * smart HTTP response; validate that the service
415 * pkt-line matches our request.
417 line = packet_read_line_buf(&last->buf, &last->len, NULL);
419 die("invalid server response; expected service, got flush packet");
422 strbuf_addf(&exp, "# service=%s", service);
423 if (strcmp(line, exp.buf))
424 die("invalid server response; got '%s'", line);
425 strbuf_release(&exp);
427 /* The header can include additional metadata lines, up
428 * until a packet flush marker. Ignore these now, but
429 * in the future we might start to scan them.
431 while (packet_read_line_buf(&last->buf, &last->len, NULL))
435 } else if (maybe_smart &&
436 last->len > 5 && starts_with(last->buf + 4, "version 2")) {
441 last->refs = parse_git_refs(last, for_push);
443 last->refs = parse_info_refs(last);
445 strbuf_release(&refs_url);
446 strbuf_release(&exp);
447 strbuf_release(&type);
448 strbuf_release(&charset);
449 strbuf_release(&effective_url);
450 strbuf_release(&buffer);
451 strbuf_release(&protocol_header);
452 string_list_clear(&extra_headers, 0);
453 last_discovery = last;
457 static struct ref *get_refs(int for_push)
459 struct discovery *heads;
462 heads = discover_refs("git-receive-pack", for_push);
464 heads = discover_refs("git-upload-pack", for_push);
469 static void output_refs(struct ref *refs)
472 for (posn = refs; posn; posn = posn->next) {
474 printf("@%s %s\n", posn->symref, posn->name);
476 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
483 const char *service_name;
485 struct strbuf *stdin_preamble;
487 char *hdr_content_type;
489 char *protocol_header;
497 struct strbuf result;
498 unsigned gzip_request : 1;
499 unsigned initial_buffer : 1;
502 static size_t rpc_out(void *ptr, size_t eltsize,
503 size_t nmemb, void *buffer_)
505 size_t max = eltsize * nmemb;
506 struct rpc_state *rpc = buffer_;
507 size_t avail = rpc->len - rpc->pos;
510 rpc->initial_buffer = 0;
511 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
520 memcpy(ptr, rpc->buf + rpc->pos, avail);
525 #ifndef NO_CURL_IOCTL
526 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
528 struct rpc_state *rpc = clientp;
534 case CURLIOCMD_RESTARTREAD:
535 if (rpc->initial_buffer) {
539 error("unable to rewind rpc post data - try increasing http.postBuffer");
540 return CURLIOE_FAILRESTART;
543 return CURLIOE_UNKNOWNCMD;
549 struct rpc_state *rpc;
553 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
556 static size_t rpc_in(char *ptr, size_t eltsize,
557 size_t nmemb, void *buffer_)
559 size_t size = eltsize * nmemb;
560 struct rpc_in_data *data = buffer_;
562 data->rpc->any_written = 1;
563 write_or_die(data->rpc->in, ptr, size);
567 static int run_slot(struct active_request_slot *slot,
568 struct slot_results *results)
571 struct slot_results results_buf;
574 results = &results_buf;
576 err = run_one_slot(slot, results);
578 if (err != HTTP_OK && err != HTTP_REAUTH) {
579 struct strbuf msg = STRBUF_INIT;
580 if (results->http_code && results->http_code != 200)
581 strbuf_addf(&msg, "HTTP %ld", results->http_code);
582 if (results->curl_result != CURLE_OK) {
584 strbuf_addch(&msg, ' ');
585 strbuf_addf(&msg, "curl %d", results->curl_result);
586 if (curl_errorstr[0]) {
587 strbuf_addch(&msg, ' ');
588 strbuf_addstr(&msg, curl_errorstr);
591 error("RPC failed; %s", msg.buf);
592 strbuf_release(&msg);
598 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
600 struct active_request_slot *slot;
601 struct curl_slist *headers = http_copy_default_headers();
602 struct strbuf buf = STRBUF_INIT;
605 slot = get_active_slot();
607 headers = curl_slist_append(headers, rpc->hdr_content_type);
608 headers = curl_slist_append(headers, rpc->hdr_accept);
610 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
611 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
612 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
613 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
614 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
615 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
616 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
617 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
618 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
620 err = run_slot(slot, results);
622 curl_slist_free_all(headers);
623 strbuf_release(&buf);
627 static curl_off_t xcurl_off_t(size_t len) {
628 uintmax_t size = len;
629 if (size > maximum_signed_value_of_type(curl_off_t))
630 die("cannot handle pushes this big");
631 return (curl_off_t)size;
634 static int post_rpc(struct rpc_state *rpc)
636 struct active_request_slot *slot;
637 struct curl_slist *headers = http_copy_default_headers();
638 int use_gzip = rpc->gzip_request;
639 char *gzip_body = NULL;
640 size_t gzip_size = 0;
641 int err, large_request = 0;
642 int needs_100_continue = 0;
643 struct rpc_in_data rpc_in_data;
645 /* Try to load the entire request, if we can fit it into the
646 * allocated buffer space we can use HTTP/1.0 and avoid the
647 * chunked encoding mess.
650 size_t left = rpc->alloc - rpc->len;
651 char *buf = rpc->buf + rpc->len;
654 if (left < LARGE_PACKET_MAX) {
660 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
667 struct slot_results results;
670 err = probe_rpc(rpc, &results);
671 if (err == HTTP_REAUTH)
672 credential_fill(&http_auth);
673 } while (err == HTTP_REAUTH);
677 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
678 needs_100_continue = 1;
681 headers = curl_slist_append(headers, rpc->hdr_content_type);
682 headers = curl_slist_append(headers, rpc->hdr_accept);
683 headers = curl_slist_append(headers, needs_100_continue ?
684 "Expect: 100-continue" : "Expect:");
686 /* Add the extra Git-Protocol header */
687 if (rpc->protocol_header)
688 headers = curl_slist_append(headers, rpc->protocol_header);
691 slot = get_active_slot();
693 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
694 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
695 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
696 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
699 /* The request body is large and the size cannot be predicted.
700 * We must use chunked encoding to send it.
702 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
703 rpc->initial_buffer = 1;
704 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
705 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
706 #ifndef NO_CURL_IOCTL
707 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
708 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
710 if (options.verbosity > 1) {
711 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
715 } else if (gzip_body) {
717 * If we are looping to retry authentication, then the previous
718 * run will have set up the headers and gzip buffer already,
719 * and we just need to send it.
721 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
722 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
724 } else if (use_gzip && 1024 < rpc->len) {
725 /* The client backend isn't giving us compressed data so
726 * we can try to deflate it ourselves, this may save on
732 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
733 gzip_size = git_deflate_bound(&stream, rpc->len);
734 gzip_body = xmalloc(gzip_size);
736 stream.next_in = (unsigned char *)rpc->buf;
737 stream.avail_in = rpc->len;
738 stream.next_out = (unsigned char *)gzip_body;
739 stream.avail_out = gzip_size;
741 ret = git_deflate(&stream, Z_FINISH);
742 if (ret != Z_STREAM_END)
743 die("cannot deflate request; zlib deflate error %d", ret);
745 ret = git_deflate_end_gently(&stream);
747 die("cannot deflate request; zlib end error %d", ret);
749 gzip_size = stream.total_out;
751 headers = curl_slist_append(headers, "Content-Encoding: gzip");
752 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
753 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
755 if (options.verbosity > 1) {
756 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
758 (unsigned long)rpc->len, (unsigned long)gzip_size);
762 /* We know the complete request size in advance, use the
763 * more normal Content-Length approach.
765 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
766 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
767 if (options.verbosity > 1) {
768 fprintf(stderr, "POST %s (%lu bytes)\n",
769 rpc->service_name, (unsigned long)rpc->len);
774 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
775 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
776 rpc_in_data.rpc = rpc;
777 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
780 rpc->any_written = 0;
781 err = run_slot(slot, NULL);
782 if (err == HTTP_REAUTH && !large_request) {
783 credential_fill(&http_auth);
789 if (!rpc->any_written)
792 curl_slist_free_all(headers);
797 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
799 const char *svc = rpc->service_name;
800 struct strbuf buf = STRBUF_INIT;
801 struct strbuf *preamble = rpc->stdin_preamble;
802 struct child_process client = CHILD_PROCESS_INIT;
808 client.argv = rpc->argv;
809 if (start_command(&client))
812 write_or_die(client.in, preamble->buf, preamble->len);
814 write_or_die(client.in, heads->buf, heads->len);
816 rpc->alloc = http_post_buffer;
817 rpc->buf = xmalloc(rpc->alloc);
819 rpc->out = client.out;
820 strbuf_init(&rpc->result, 0);
822 strbuf_addf(&buf, "%s%s", url.buf, svc);
823 rpc->service_url = strbuf_detach(&buf, NULL);
825 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
826 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
828 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
829 rpc->hdr_accept = strbuf_detach(&buf, NULL);
831 if (get_protocol_http_header(heads->version, &buf))
832 rpc->protocol_header = strbuf_detach(&buf, NULL);
834 rpc->protocol_header = NULL;
837 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
842 err |= post_rpc(rpc);
848 strbuf_read(&rpc->result, client.out, 0);
852 if (xread(client.out, buf, sizeof(buf)) <= 0)
859 err |= finish_command(&client);
860 free(rpc->service_url);
861 free(rpc->hdr_content_type);
862 free(rpc->hdr_accept);
863 free(rpc->protocol_header);
865 strbuf_release(&buf);
869 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
871 struct walker *walker;
875 ALLOC_ARRAY(targets, nr_heads);
876 if (options.depth || options.deepen_since)
877 die("dumb http transport does not support shallow capabilities");
878 for (i = 0; i < nr_heads; i++)
879 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
881 walker = get_http_walker(url.buf);
882 walker->get_verbosely = options.verbosity >= 3;
883 walker->get_recover = 0;
884 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
887 for (i = 0; i < nr_heads; i++)
891 return ret ? error("fetch failed.") : 0;
894 static int fetch_git(struct discovery *heads,
895 int nr_heads, struct ref **to_fetch)
897 struct rpc_state rpc;
898 struct strbuf preamble = STRBUF_INIT;
900 struct argv_array args = ARGV_ARRAY_INIT;
902 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
903 "--stdin", "--lock-pack", NULL);
904 if (options.followtags)
905 argv_array_push(&args, "--include-tag");
907 argv_array_push(&args, "--thin");
908 if (options.verbosity >= 3)
909 argv_array_pushl(&args, "-v", "-v", NULL);
910 if (options.check_self_contained_and_connected)
911 argv_array_push(&args, "--check-self-contained-and-connected");
913 argv_array_push(&args, "--cloning");
914 if (options.update_shallow)
915 argv_array_push(&args, "--update-shallow");
916 if (!options.progress)
917 argv_array_push(&args, "--no-progress");
919 argv_array_pushf(&args, "--depth=%lu", options.depth);
920 if (options.deepen_since)
921 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
922 for (i = 0; i < options.deepen_not.nr; i++)
923 argv_array_pushf(&args, "--shallow-exclude=%s",
924 options.deepen_not.items[i].string);
925 if (options.deepen_relative && options.depth)
926 argv_array_push(&args, "--deepen-relative");
927 if (options.from_promisor)
928 argv_array_push(&args, "--from-promisor");
929 if (options.no_dependents)
930 argv_array_push(&args, "--no-dependents");
932 argv_array_pushf(&args, "--filter=%s", options.filter);
933 argv_array_push(&args, url.buf);
935 for (i = 0; i < nr_heads; i++) {
936 struct ref *ref = to_fetch[i];
938 die("cannot fetch by sha1 over smart http");
939 packet_buf_write(&preamble, "%s %s\n",
940 oid_to_hex(&ref->old_oid), ref->name);
942 packet_buf_flush(&preamble);
944 memset(&rpc, 0, sizeof(rpc));
945 rpc.service_name = "git-upload-pack",
946 rpc.argv = args.argv;
947 rpc.stdin_preamble = &preamble;
948 rpc.gzip_request = 1;
950 err = rpc_service(&rpc, heads);
952 write_or_die(1, rpc.result.buf, rpc.result.len);
953 strbuf_release(&rpc.result);
954 strbuf_release(&preamble);
955 argv_array_clear(&args);
959 static int fetch(int nr_heads, struct ref **to_fetch)
961 struct discovery *d = discover_refs("git-upload-pack", 0);
963 return fetch_git(d, nr_heads, to_fetch);
965 return fetch_dumb(nr_heads, to_fetch);
968 static void parse_fetch(struct strbuf *buf)
970 struct ref **to_fetch = NULL;
971 struct ref *list_head = NULL;
972 struct ref **list = &list_head;
973 int alloc_heads = 0, nr_heads = 0;
977 if (skip_prefix(buf->buf, "fetch ", &p)) {
980 struct object_id old_oid;
982 if (get_oid_hex(p, &old_oid))
983 die("protocol error: expected sha/ref, got %s'", p);
984 if (p[GIT_SHA1_HEXSZ] == ' ')
985 name = p + GIT_SHA1_HEXSZ + 1;
986 else if (!p[GIT_SHA1_HEXSZ])
989 die("protocol error: expected sha/ref, got %s'", p);
991 ref = alloc_ref(name);
992 oidcpy(&ref->old_oid, &old_oid);
997 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
998 to_fetch[nr_heads++] = ref;
1001 die("http transport does not support %s", buf->buf);
1004 if (strbuf_getline_lf(buf, stdin) == EOF)
1010 if (fetch(nr_heads, to_fetch))
1011 exit(128); /* error already reported */
1012 free_refs(list_head);
1020 static int push_dav(int nr_spec, char **specs)
1022 struct child_process child = CHILD_PROCESS_INIT;
1026 argv_array_push(&child.args, "http-push");
1027 argv_array_push(&child.args, "--helper-status");
1028 if (options.dry_run)
1029 argv_array_push(&child.args, "--dry-run");
1030 if (options.verbosity > 1)
1031 argv_array_push(&child.args, "--verbose");
1032 argv_array_push(&child.args, url.buf);
1033 for (i = 0; i < nr_spec; i++)
1034 argv_array_push(&child.args, specs[i]);
1036 if (run_command(&child))
1037 die("git-http-push failed");
1041 static int push_git(struct discovery *heads, int nr_spec, char **specs)
1043 struct rpc_state rpc;
1045 struct argv_array args;
1046 struct string_list_item *cas_option;
1047 struct strbuf preamble = STRBUF_INIT;
1049 argv_array_init(&args);
1050 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1054 argv_array_push(&args, "--thin");
1055 if (options.dry_run)
1056 argv_array_push(&args, "--dry-run");
1057 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1058 argv_array_push(&args, "--signed=yes");
1059 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1060 argv_array_push(&args, "--signed=if-asked");
1061 if (options.verbosity == 0)
1062 argv_array_push(&args, "--quiet");
1063 else if (options.verbosity > 1)
1064 argv_array_push(&args, "--verbose");
1065 for (i = 0; i < options.push_options.nr; i++)
1066 argv_array_pushf(&args, "--push-option=%s",
1067 options.push_options.items[i].string);
1068 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1069 for_each_string_list_item(cas_option, &cas_options)
1070 argv_array_push(&args, cas_option->string);
1071 argv_array_push(&args, url.buf);
1073 argv_array_push(&args, "--stdin");
1074 for (i = 0; i < nr_spec; i++)
1075 packet_buf_write(&preamble, "%s\n", specs[i]);
1076 packet_buf_flush(&preamble);
1078 memset(&rpc, 0, sizeof(rpc));
1079 rpc.service_name = "git-receive-pack",
1080 rpc.argv = args.argv;
1081 rpc.stdin_preamble = &preamble;
1083 err = rpc_service(&rpc, heads);
1085 write_or_die(1, rpc.result.buf, rpc.result.len);
1086 strbuf_release(&rpc.result);
1087 strbuf_release(&preamble);
1088 argv_array_clear(&args);
1092 static int push(int nr_spec, char **specs)
1094 struct discovery *heads = discover_refs("git-receive-pack", 1);
1097 if (heads->proto_git)
1098 ret = push_git(heads, nr_spec, specs);
1100 ret = push_dav(nr_spec, specs);
1101 free_discovery(heads);
1105 static void parse_push(struct strbuf *buf)
1107 char **specs = NULL;
1108 int alloc_spec = 0, nr_spec = 0, i, ret;
1111 if (starts_with(buf->buf, "push ")) {
1112 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1113 specs[nr_spec++] = xstrdup(buf->buf + 5);
1116 die("http transport does not support %s", buf->buf);
1119 if (strbuf_getline_lf(buf, stdin) == EOF)
1125 ret = push(nr_spec, specs);
1130 exit(128); /* error already reported */
1133 for (i = 0; i < nr_spec; i++)
1139 * Used to represent the state of a connection to an HTTP server when
1140 * communicating using git's wire-protocol version 2.
1142 struct proxy_state {
1145 struct curl_slist *headers;
1146 struct strbuf request_buffer;
1149 struct packet_reader reader;
1154 static void proxy_state_init(struct proxy_state *p, const char *service_name,
1155 enum protocol_version version)
1157 struct strbuf buf = STRBUF_INIT;
1159 memset(p, 0, sizeof(*p));
1160 p->service_name = xstrdup(service_name);
1164 strbuf_init(&p->request_buffer, 0);
1166 strbuf_addf(&buf, "%s%s", url.buf, p->service_name);
1167 p->service_url = strbuf_detach(&buf, NULL);
1169 p->headers = http_copy_default_headers();
1171 strbuf_addf(&buf, "Content-Type: application/x-%s-request", p->service_name);
1172 p->headers = curl_slist_append(p->headers, buf.buf);
1175 strbuf_addf(&buf, "Accept: application/x-%s-result", p->service_name);
1176 p->headers = curl_slist_append(p->headers, buf.buf);
1179 p->headers = curl_slist_append(p->headers, "Transfer-Encoding: chunked");
1181 /* Add the Git-Protocol header */
1182 if (get_protocol_http_header(version, &buf))
1183 p->headers = curl_slist_append(p->headers, buf.buf);
1185 packet_reader_init(&p->reader, p->in, NULL, 0,
1186 PACKET_READ_GENTLE_ON_EOF);
1188 strbuf_release(&buf);
1191 static void proxy_state_clear(struct proxy_state *p)
1193 free(p->service_name);
1194 free(p->service_url);
1195 curl_slist_free_all(p->headers);
1196 strbuf_release(&p->request_buffer);
1200 * CURLOPT_READFUNCTION callback function.
1201 * Attempts to copy over a single packet-line at a time into the
1202 * curl provided buffer.
1204 static size_t proxy_in(char *buffer, size_t eltsize,
1205 size_t nmemb, void *userdata)
1208 struct proxy_state *p = userdata;
1209 size_t avail = p->request_buffer.len - p->pos;
1213 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1214 (uintmax_t)eltsize);
1218 if (p->seen_flush) {
1223 strbuf_reset(&p->request_buffer);
1224 switch (packet_reader_read(&p->reader)) {
1225 case PACKET_READ_EOF:
1226 die("unexpected EOF when reading from parent process");
1227 case PACKET_READ_NORMAL:
1228 packet_buf_write_len(&p->request_buffer, p->reader.line,
1231 case PACKET_READ_DELIM:
1232 packet_buf_delim(&p->request_buffer);
1234 case PACKET_READ_FLUSH:
1235 packet_buf_flush(&p->request_buffer);
1240 avail = p->request_buffer.len;
1245 memcpy(buffer, p->request_buffer.buf + p->pos, avail);
1250 static size_t proxy_out(char *buffer, size_t eltsize,
1251 size_t nmemb, void *userdata)
1254 struct proxy_state *p = userdata;
1257 BUG("curl read callback called with size = %"PRIuMAX" != 1",
1258 (uintmax_t)eltsize);
1261 write_or_die(p->out, buffer, size);
1265 /* Issues a request to the HTTP server configured in `p` */
1266 static int proxy_request(struct proxy_state *p)
1268 struct active_request_slot *slot;
1270 slot = get_active_slot();
1272 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
1273 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
1274 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
1275 curl_easy_setopt(slot->curl, CURLOPT_URL, p->service_url);
1276 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, p->headers);
1278 /* Setup function to read request from client */
1279 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, proxy_in);
1280 curl_easy_setopt(slot->curl, CURLOPT_READDATA, p);
1282 /* Setup function to write server response to client */
1283 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, proxy_out);
1284 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, p);
1286 if (run_slot(slot, NULL) != HTTP_OK)
1292 static int stateless_connect(const char *service_name)
1294 struct discovery *discover;
1295 struct proxy_state p;
1298 * Run the info/refs request and see if the server supports protocol
1299 * v2. If and only if the server supports v2 can we successfully
1300 * establish a stateless connection, otherwise we need to tell the
1301 * client to fallback to using other transport helper functions to
1302 * complete their request.
1304 discover = discover_refs(service_name, 0);
1305 if (discover->version != protocol_v2) {
1306 printf("fallback\n");
1310 /* Stateless Connection established */
1315 proxy_state_init(&p, service_name, discover->version);
1318 * Dump the capability listing that we got from the server earlier
1319 * during the info/refs request.
1321 write_or_die(p.out, discover->buf, discover->len);
1323 /* Peek the next packet line. Until we see EOF keep sending POSTs */
1324 while (packet_reader_peek(&p.reader) != PACKET_READ_EOF) {
1325 if (proxy_request(&p)) {
1326 /* We would have an err here */
1331 proxy_state_clear(&p);
1335 int cmd_main(int argc, const char **argv)
1337 struct strbuf buf = STRBUF_INIT;
1340 setup_git_directory_gently(&nongit);
1342 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1346 options.verbosity = 1;
1347 options.progress = !!isatty(2);
1349 string_list_init(&options.deepen_not, 1);
1350 string_list_init(&options.push_options, 1);
1352 remote = remote_get(argv[1]);
1355 end_url_with_slash(&url, argv[2]);
1357 end_url_with_slash(&url, remote->url[0]);
1360 http_init(remote, url.buf, 0);
1365 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1367 error("remote-curl: error reading command stream from git");
1372 if (starts_with(buf.buf, "fetch ")) {
1374 die("remote-curl: fetch attempted without a local repo");
1377 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1378 int for_push = !!strstr(buf.buf + 4, "for-push");
1379 output_refs(get_refs(for_push));
1381 } else if (starts_with(buf.buf, "push ")) {
1384 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1385 char *value = strchr(arg, ' ');
1393 result = set_option(arg, value);
1396 else if (result < 0)
1397 printf("error invalid value\n");
1399 printf("unsupported\n");
1402 } else if (!strcmp(buf.buf, "capabilities")) {
1403 printf("stateless-connect\n");
1407 printf("check-connectivity\n");
1410 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1411 if (!stateless_connect(arg))
1414 error("remote-curl: unknown command '%s' from git", buf.buf);