7 #include "run-command.h"
11 static struct remote *remote;
12 static const char *url; /* always ends with a trailing slash */
17 unsigned progress : 1,
22 static struct options options;
24 static int set_option(const char *name, const char *value)
26 if (!strcmp(name, "verbosity")) {
28 int v = strtol(value, &end, 10);
29 if (value == end || *end)
31 options.verbosity = v;
34 else if (!strcmp(name, "progress")) {
35 if (!strcmp(value, "true"))
37 else if (!strcmp(value, "false"))
43 else if (!strcmp(name, "depth")) {
45 unsigned long v = strtoul(value, &end, 10);
46 if (value == end || *end)
51 else if (!strcmp(name, "followtags")) {
52 if (!strcmp(value, "true"))
53 options.followtags = 1;
54 else if (!strcmp(value, "false"))
55 options.followtags = 0;
60 else if (!strcmp(name, "dry-run")) {
61 if (!strcmp(value, "true"))
63 else if (!strcmp(value, "false"))
70 return 1 /* unsupported */;
79 unsigned proto_git : 1;
81 static struct discovery *last_discovery;
83 static void free_discovery(struct discovery *d)
86 if (d == last_discovery)
87 last_discovery = NULL;
93 static struct discovery* discover_refs(const char *service)
95 struct strbuf buffer = STRBUF_INIT;
96 struct discovery *last = last_discovery;
98 int http_ret, is_http = 0, proto_git_candidate = 1;
100 if (last && !strcmp(service, last->service))
102 free_discovery(last);
104 strbuf_addf(&buffer, "%sinfo/refs", url);
105 if (!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) {
107 if (!strchr(url, '?'))
108 strbuf_addch(&buffer, '?');
110 strbuf_addch(&buffer, '&');
111 strbuf_addf(&buffer, "service=%s", service);
113 refs_url = strbuf_detach(&buffer, NULL);
115 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
117 /* try again with "plain" url (no ? or & appended) */
118 if (http_ret != HTTP_OK && http_ret != HTTP_NOAUTH) {
120 strbuf_reset(&buffer);
122 proto_git_candidate = 0;
123 strbuf_addf(&buffer, "%sinfo/refs", url);
124 refs_url = strbuf_detach(&buffer, NULL);
126 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
132 case HTTP_MISSING_TARGET:
133 die("%s not found: did you run git update-server-info on the"
134 " server?", refs_url);
136 die("Authentication failed");
138 http_error(refs_url, http_ret);
139 die("HTTP request failed");
142 last= xcalloc(1, sizeof(*last_discovery));
143 last->service = service;
144 last->buf_alloc = strbuf_detach(&buffer, &last->len);
145 last->buf = last->buf_alloc;
147 if (is_http && proto_git_candidate
148 && 5 <= last->len && last->buf[4] == '#') {
149 /* smart HTTP response; validate that the service
150 * pkt-line matches our request.
152 struct strbuf exp = STRBUF_INIT;
154 if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
155 die("%s has invalid packet header", refs_url);
156 if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
157 strbuf_setlen(&buffer, buffer.len - 1);
159 strbuf_addf(&exp, "# service=%s", service);
160 if (strbuf_cmp(&exp, &buffer))
161 die("invalid server response; got '%s'", buffer.buf);
162 strbuf_release(&exp);
164 /* The header can include additional metadata lines, up
165 * until a packet flush marker. Ignore these now, but
166 * in the future we might start to scan them.
168 strbuf_reset(&buffer);
169 while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
170 strbuf_reset(&buffer);
176 strbuf_release(&buffer);
177 last_discovery = last;
181 static int write_discovery(int in, int out, void *data)
183 struct discovery *heads = data;
185 if (write_in_full(out, heads->buf, heads->len) != heads->len)
191 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
193 struct ref *list = NULL;
196 memset(&async, 0, sizeof(async));
197 async.proc = write_discovery;
201 if (start_async(&async))
202 die("cannot start thread to parse advertised refs");
203 get_remote_heads(async.out, &list,
204 for_push ? REF_NORMAL : 0, NULL);
206 if (finish_async(&async))
207 die("ref parsing thread failed");
211 static struct ref *parse_info_refs(struct discovery *heads)
213 char *data, *start, *mid;
217 struct ref *refs = NULL;
218 struct ref *ref = NULL;
219 struct ref *last_ref = NULL;
224 while (i < heads->len) {
230 if (data[i] == '\n') {
231 if (mid - start != 40)
232 die("%sinfo/refs not valid: is this a git repository?", url);
235 ref = xmalloc(sizeof(struct ref) +
236 strlen(ref_name) + 1);
237 memset(ref, 0, sizeof(struct ref));
238 strcpy(ref->name, ref_name);
239 get_sha1_hex(start, ref->old_sha1);
243 last_ref->next = ref;
250 ref = alloc_ref("HEAD");
251 if (!http_fetch_ref(url, ref) &&
252 !resolve_remote_symref(ref, refs)) {
262 static struct ref *get_refs(int for_push)
264 struct discovery *heads;
267 heads = discover_refs("git-receive-pack");
269 heads = discover_refs("git-upload-pack");
271 if (heads->proto_git)
272 return parse_git_refs(heads, for_push);
273 return parse_info_refs(heads);
276 static void output_refs(struct ref *refs)
279 for (posn = refs; posn; posn = posn->next) {
281 printf("@%s %s\n", posn->symref, posn->name);
283 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
291 const char *service_name;
293 struct strbuf *stdin_preamble;
295 char *hdr_content_type;
303 struct strbuf result;
304 unsigned gzip_request : 1;
305 unsigned initial_buffer : 1;
308 static size_t rpc_out(void *ptr, size_t eltsize,
309 size_t nmemb, void *buffer_)
311 size_t max = eltsize * nmemb;
312 struct rpc_state *rpc = buffer_;
313 size_t avail = rpc->len - rpc->pos;
316 rpc->initial_buffer = 0;
317 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
326 memcpy(ptr, rpc->buf + rpc->pos, avail);
331 #ifndef NO_CURL_IOCTL
332 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
334 struct rpc_state *rpc = clientp;
340 case CURLIOCMD_RESTARTREAD:
341 if (rpc->initial_buffer) {
345 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
346 return CURLIOE_FAILRESTART;
349 return CURLIOE_UNKNOWNCMD;
354 static size_t rpc_in(char *ptr, size_t eltsize,
355 size_t nmemb, void *buffer_)
357 size_t size = eltsize * nmemb;
358 struct rpc_state *rpc = buffer_;
359 write_or_die(rpc->in, ptr, size);
363 static int run_slot(struct active_request_slot *slot)
366 struct slot_results results;
368 slot->results = &results;
369 slot->curl_result = curl_easy_perform(slot->curl);
370 finish_active_slot(slot);
372 err = handle_curl_result(&results);
373 if (err != HTTP_OK && err != HTTP_REAUTH) {
374 error("RPC failed; result=%d, HTTP code = %ld",
375 results.curl_result, results.http_code);
381 static int probe_rpc(struct rpc_state *rpc)
383 struct active_request_slot *slot;
384 struct curl_slist *headers = NULL;
385 struct strbuf buf = STRBUF_INIT;
388 slot = get_active_slot();
390 headers = curl_slist_append(headers, rpc->hdr_content_type);
391 headers = curl_slist_append(headers, rpc->hdr_accept);
393 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
394 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
395 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
396 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
397 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
398 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
399 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
400 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
401 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
403 err = run_slot(slot);
405 curl_slist_free_all(headers);
406 strbuf_release(&buf);
410 static int post_rpc(struct rpc_state *rpc)
412 struct active_request_slot *slot;
413 struct curl_slist *headers = NULL;
414 int use_gzip = rpc->gzip_request;
415 char *gzip_body = NULL;
416 int err, large_request = 0;
418 /* Try to load the entire request, if we can fit it into the
419 * allocated buffer space we can use HTTP/1.0 and avoid the
420 * chunked encoding mess.
423 size_t left = rpc->alloc - rpc->len;
424 char *buf = rpc->buf + rpc->len;
427 if (left < LARGE_PACKET_MAX) {
433 n = packet_read_line(rpc->out, buf, left);
441 err = probe_rpc(rpc);
442 } while (err == HTTP_REAUTH);
447 headers = curl_slist_append(headers, rpc->hdr_content_type);
448 headers = curl_slist_append(headers, rpc->hdr_accept);
449 headers = curl_slist_append(headers, "Expect:");
452 slot = get_active_slot();
454 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
455 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
456 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
457 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
460 /* The request body is large and the size cannot be predicted.
461 * We must use chunked encoding to send it.
463 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
464 rpc->initial_buffer = 1;
465 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
466 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
467 #ifndef NO_CURL_IOCTL
468 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
469 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
471 if (options.verbosity > 1) {
472 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
476 } else if (use_gzip && 1024 < rpc->len) {
477 /* The client backend isn't giving us compressed data so
478 * we can try to deflate it ourselves, this may save on.
485 memset(&stream, 0, sizeof(stream));
486 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
487 size = git_deflate_bound(&stream, rpc->len);
488 gzip_body = xmalloc(size);
490 stream.next_in = (unsigned char *)rpc->buf;
491 stream.avail_in = rpc->len;
492 stream.next_out = (unsigned char *)gzip_body;
493 stream.avail_out = size;
495 ret = git_deflate(&stream, Z_FINISH);
496 if (ret != Z_STREAM_END)
497 die("cannot deflate request; zlib deflate error %d", ret);
499 ret = git_deflate_end_gently(&stream);
501 die("cannot deflate request; zlib end error %d", ret);
503 size = stream.total_out;
505 headers = curl_slist_append(headers, "Content-Encoding: gzip");
506 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
507 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
509 if (options.verbosity > 1) {
510 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
512 (unsigned long)rpc->len, (unsigned long)size);
516 /* We know the complete request size in advance, use the
517 * more normal Content-Length approach.
519 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
520 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
521 if (options.verbosity > 1) {
522 fprintf(stderr, "POST %s (%lu bytes)\n",
523 rpc->service_name, (unsigned long)rpc->len);
528 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
529 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
530 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
532 err = run_slot(slot);
533 if (err == HTTP_REAUTH && !large_request && !use_gzip)
538 curl_slist_free_all(headers);
543 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
545 const char *svc = rpc->service_name;
546 struct strbuf buf = STRBUF_INIT;
547 struct strbuf *preamble = rpc->stdin_preamble;
548 struct child_process client;
551 memset(&client, 0, sizeof(client));
555 client.argv = rpc->argv;
556 if (start_command(&client))
559 write_or_die(client.in, preamble->buf, preamble->len);
561 write_or_die(client.in, heads->buf, heads->len);
563 rpc->alloc = http_post_buffer;
564 rpc->buf = xmalloc(rpc->alloc);
566 rpc->out = client.out;
567 strbuf_init(&rpc->result, 0);
569 strbuf_addf(&buf, "%s%s", url, svc);
570 rpc->service_url = strbuf_detach(&buf, NULL);
572 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
573 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
575 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
576 rpc->hdr_accept = strbuf_detach(&buf, NULL);
579 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
584 err |= post_rpc(rpc);
590 strbuf_read(&rpc->result, client.out, 0);
594 if (xread(client.out, buf, sizeof(buf)) <= 0)
601 err |= finish_command(&client);
602 free(rpc->service_url);
603 free(rpc->hdr_content_type);
604 free(rpc->hdr_accept);
606 strbuf_release(&buf);
610 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
612 struct walker *walker;
613 char **targets = xmalloc(nr_heads * sizeof(char*));
617 die("dumb http transport does not support --depth");
618 for (i = 0; i < nr_heads; i++)
619 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
621 walker = get_http_walker(url);
623 walker->get_tree = 1;
624 walker->get_history = 1;
625 walker->get_verbosely = options.verbosity >= 3;
626 walker->get_recover = 0;
627 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
630 for (i = 0; i < nr_heads; i++)
634 return ret ? error("Fetch failed.") : 0;
637 static int fetch_git(struct discovery *heads,
638 int nr_heads, struct ref **to_fetch)
640 struct rpc_state rpc;
641 struct strbuf preamble = STRBUF_INIT;
642 char *depth_arg = NULL;
643 int argc = 0, i, err;
644 const char *argv[15];
646 argv[argc++] = "fetch-pack";
647 argv[argc++] = "--stateless-rpc";
648 argv[argc++] = "--stdin";
649 argv[argc++] = "--lock-pack";
650 if (options.followtags)
651 argv[argc++] = "--include-tag";
653 argv[argc++] = "--thin";
654 if (options.verbosity >= 3) {
658 if (!options.progress)
659 argv[argc++] = "--no-progress";
661 struct strbuf buf = STRBUF_INIT;
662 strbuf_addf(&buf, "--depth=%lu", options.depth);
663 depth_arg = strbuf_detach(&buf, NULL);
664 argv[argc++] = depth_arg;
669 for (i = 0; i < nr_heads; i++) {
670 struct ref *ref = to_fetch[i];
671 if (!ref->name || !*ref->name)
672 die("cannot fetch by sha1 over smart http");
673 packet_buf_write(&preamble, "%s\n", ref->name);
675 packet_buf_flush(&preamble);
677 memset(&rpc, 0, sizeof(rpc));
678 rpc.service_name = "git-upload-pack",
680 rpc.stdin_preamble = &preamble;
681 rpc.gzip_request = 1;
683 err = rpc_service(&rpc, heads);
685 safe_write(1, rpc.result.buf, rpc.result.len);
686 strbuf_release(&rpc.result);
687 strbuf_release(&preamble);
692 static int fetch(int nr_heads, struct ref **to_fetch)
694 struct discovery *d = discover_refs("git-upload-pack");
696 return fetch_git(d, nr_heads, to_fetch);
698 return fetch_dumb(nr_heads, to_fetch);
701 static void parse_fetch(struct strbuf *buf)
703 struct ref **to_fetch = NULL;
704 struct ref *list_head = NULL;
705 struct ref **list = &list_head;
706 int alloc_heads = 0, nr_heads = 0;
709 if (!prefixcmp(buf->buf, "fetch ")) {
710 char *p = buf->buf + strlen("fetch ");
713 unsigned char old_sha1[20];
715 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
716 die("protocol error: expected sha/ref, got %s'", p);
722 die("protocol error: expected sha/ref, got %s'", p);
724 ref = alloc_ref(name);
725 hashcpy(ref->old_sha1, old_sha1);
730 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
731 to_fetch[nr_heads++] = ref;
734 die("http transport does not support %s", buf->buf);
737 if (strbuf_getline(buf, stdin, '\n') == EOF)
743 if (fetch(nr_heads, to_fetch))
744 exit(128); /* error already reported */
745 free_refs(list_head);
753 static int push_dav(int nr_spec, char **specs)
755 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
758 argv[argc++] = "http-push";
759 argv[argc++] = "--helper-status";
761 argv[argc++] = "--dry-run";
762 if (options.verbosity > 1)
763 argv[argc++] = "--verbose";
765 for (i = 0; i < nr_spec; i++)
766 argv[argc++] = specs[i];
769 if (run_command_v_opt(argv, RUN_GIT_CMD))
770 die("git-%s failed", argv[0]);
775 static int push_git(struct discovery *heads, int nr_spec, char **specs)
777 struct rpc_state rpc;
779 int argc = 0, i, err;
781 argv = xmalloc((10 + nr_spec) * sizeof(char*));
782 argv[argc++] = "send-pack";
783 argv[argc++] = "--stateless-rpc";
784 argv[argc++] = "--helper-status";
786 argv[argc++] = "--thin";
788 argv[argc++] = "--dry-run";
789 if (options.verbosity == 0)
790 argv[argc++] = "--quiet";
791 else if (options.verbosity > 1)
792 argv[argc++] = "--verbose";
793 argv[argc++] = options.progress ? "--progress" : "--no-progress";
795 for (i = 0; i < nr_spec; i++)
796 argv[argc++] = specs[i];
799 memset(&rpc, 0, sizeof(rpc));
800 rpc.service_name = "git-receive-pack",
803 err = rpc_service(&rpc, heads);
805 safe_write(1, rpc.result.buf, rpc.result.len);
806 strbuf_release(&rpc.result);
811 static int push(int nr_spec, char **specs)
813 struct discovery *heads = discover_refs("git-receive-pack");
816 if (heads->proto_git)
817 ret = push_git(heads, nr_spec, specs);
819 ret = push_dav(nr_spec, specs);
820 free_discovery(heads);
824 static void parse_push(struct strbuf *buf)
827 int alloc_spec = 0, nr_spec = 0, i, ret;
830 if (!prefixcmp(buf->buf, "push ")) {
831 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
832 specs[nr_spec++] = xstrdup(buf->buf + 5);
835 die("http transport does not support %s", buf->buf);
838 if (strbuf_getline(buf, stdin, '\n') == EOF)
844 ret = push(nr_spec, specs);
849 exit(128); /* error already reported */
852 for (i = 0; i < nr_spec; i++)
857 int main(int argc, const char **argv)
859 struct strbuf buf = STRBUF_INIT;
862 git_extract_argv0_path(argv[0]);
863 setup_git_directory_gently(&nongit);
865 fprintf(stderr, "Remote needed\n");
869 options.verbosity = 1;
870 options.progress = !!isatty(2);
873 remote = remote_get(argv[1]);
876 end_url_with_slash(&buf, argv[2]);
878 end_url_with_slash(&buf, remote->url[0]);
881 url = strbuf_detach(&buf, NULL);
883 http_init(remote, url, 0);
886 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
888 fprintf(stderr, "Error reading command stream\n");
890 fprintf(stderr, "Unexpected end of command stream\n");
895 if (!prefixcmp(buf.buf, "fetch ")) {
897 die("Fetch attempted without a local repo");
900 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
901 int for_push = !!strstr(buf.buf + 4, "for-push");
902 output_refs(get_refs(for_push));
904 } else if (!prefixcmp(buf.buf, "push ")) {
907 } else if (!prefixcmp(buf.buf, "option ")) {
908 char *name = buf.buf + strlen("option ");
909 char *value = strchr(name, ' ');
917 result = set_option(name, value);
921 printf("error invalid value\n");
923 printf("unsupported\n");
926 } else if (!strcmp(buf.buf, "capabilities")) {
933 fprintf(stderr, "Unknown command '%s'\n", buf.buf);