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) {
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)
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, 0, NULL, 0, NULL);
205 if (finish_async(&async))
206 die("ref parsing thread failed");
210 static struct ref *parse_info_refs(struct discovery *heads)
212 char *data, *start, *mid;
216 struct ref *refs = NULL;
217 struct ref *ref = NULL;
218 struct ref *last_ref = NULL;
223 while (i < heads->len) {
229 if (data[i] == '\n') {
230 if (mid - start != 40)
231 die("%sinfo/refs not valid: is this a git repository?", url);
234 ref = xmalloc(sizeof(struct ref) +
235 strlen(ref_name) + 1);
236 memset(ref, 0, sizeof(struct ref));
237 strcpy(ref->name, ref_name);
238 get_sha1_hex(start, ref->old_sha1);
242 last_ref->next = ref;
249 ref = alloc_ref("HEAD");
250 if (!http_fetch_ref(url, ref) &&
251 !resolve_remote_symref(ref, refs)) {
261 static struct ref *get_refs(int for_push)
263 struct discovery *heads;
266 heads = discover_refs("git-receive-pack");
268 heads = discover_refs("git-upload-pack");
270 if (heads->proto_git)
271 return parse_git_refs(heads);
272 return parse_info_refs(heads);
275 static void output_refs(struct ref *refs)
278 for (posn = refs; posn; posn = posn->next) {
280 printf("@%s %s\n", posn->symref, posn->name);
282 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
290 const char *service_name;
293 char *hdr_content_type;
301 struct strbuf result;
302 unsigned gzip_request : 1;
303 unsigned initial_buffer : 1;
306 static size_t rpc_out(void *ptr, size_t eltsize,
307 size_t nmemb, void *buffer_)
309 size_t max = eltsize * nmemb;
310 struct rpc_state *rpc = buffer_;
311 size_t avail = rpc->len - rpc->pos;
314 rpc->initial_buffer = 0;
315 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
324 memcpy(ptr, rpc->buf + rpc->pos, avail);
329 #ifndef NO_CURL_IOCTL
330 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
332 struct rpc_state *rpc = clientp;
338 case CURLIOCMD_RESTARTREAD:
339 if (rpc->initial_buffer) {
343 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
344 return CURLIOE_FAILRESTART;
347 return CURLIOE_UNKNOWNCMD;
352 static size_t rpc_in(char *ptr, size_t eltsize,
353 size_t nmemb, void *buffer_)
355 size_t size = eltsize * nmemb;
356 struct rpc_state *rpc = buffer_;
357 write_or_die(rpc->in, ptr, size);
361 static int run_slot(struct active_request_slot *slot)
364 struct slot_results results;
366 slot->results = &results;
367 slot->curl_result = curl_easy_perform(slot->curl);
368 finish_active_slot(slot);
370 if (results.curl_result != CURLE_OK) {
371 err |= error("RPC failed; result=%d, HTTP code = %ld",
372 results.curl_result, results.http_code);
378 static int probe_rpc(struct rpc_state *rpc)
380 struct active_request_slot *slot;
381 struct curl_slist *headers = NULL;
382 struct strbuf buf = STRBUF_INIT;
385 slot = get_active_slot();
387 headers = curl_slist_append(headers, rpc->hdr_content_type);
388 headers = curl_slist_append(headers, rpc->hdr_accept);
390 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
391 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
392 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
393 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
394 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
395 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
396 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
397 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
398 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
400 err = run_slot(slot);
402 curl_slist_free_all(headers);
403 strbuf_release(&buf);
407 static int post_rpc(struct rpc_state *rpc)
409 struct active_request_slot *slot;
410 struct curl_slist *headers = NULL;
411 int use_gzip = rpc->gzip_request;
412 char *gzip_body = NULL;
413 int err, large_request = 0;
415 /* Try to load the entire request, if we can fit it into the
416 * allocated buffer space we can use HTTP/1.0 and avoid the
417 * chunked encoding mess.
420 size_t left = rpc->alloc - rpc->len;
421 char *buf = rpc->buf + rpc->len;
424 if (left < LARGE_PACKET_MAX) {
430 n = packet_read_line(rpc->out, buf, left);
437 err = probe_rpc(rpc);
442 slot = get_active_slot();
444 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
445 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
446 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
447 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
449 headers = curl_slist_append(headers, rpc->hdr_content_type);
450 headers = curl_slist_append(headers, rpc->hdr_accept);
451 headers = curl_slist_append(headers, "Expect:");
454 /* The request body is large and the size cannot be predicted.
455 * We must use chunked encoding to send it.
457 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
458 rpc->initial_buffer = 1;
459 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
460 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
461 #ifndef NO_CURL_IOCTL
462 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
463 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
465 if (options.verbosity > 1) {
466 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
470 } else if (use_gzip && 1024 < rpc->len) {
471 /* The client backend isn't giving us compressed data so
472 * we can try to deflate it ourselves, this may save on.
479 memset(&stream, 0, sizeof(stream));
480 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
481 size = git_deflate_bound(&stream, rpc->len);
482 gzip_body = xmalloc(size);
484 stream.next_in = (unsigned char *)rpc->buf;
485 stream.avail_in = rpc->len;
486 stream.next_out = (unsigned char *)gzip_body;
487 stream.avail_out = size;
489 ret = git_deflate(&stream, Z_FINISH);
490 if (ret != Z_STREAM_END)
491 die("cannot deflate request; zlib deflate error %d", ret);
493 ret = git_deflate_end_gently(&stream);
495 die("cannot deflate request; zlib end error %d", ret);
497 size = stream.total_out;
499 headers = curl_slist_append(headers, "Content-Encoding: gzip");
500 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
501 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
503 if (options.verbosity > 1) {
504 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
506 (unsigned long)rpc->len, (unsigned long)size);
510 /* We know the complete request size in advance, use the
511 * more normal Content-Length approach.
513 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
514 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
515 if (options.verbosity > 1) {
516 fprintf(stderr, "POST %s (%lu bytes)\n",
517 rpc->service_name, (unsigned long)rpc->len);
522 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
523 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
524 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
526 err = run_slot(slot);
528 curl_slist_free_all(headers);
533 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
535 const char *svc = rpc->service_name;
536 struct strbuf buf = STRBUF_INIT;
537 struct child_process client;
540 memset(&client, 0, sizeof(client));
544 client.argv = rpc->argv;
545 if (start_command(&client))
548 write_or_die(client.in, heads->buf, heads->len);
550 rpc->alloc = http_post_buffer;
551 rpc->buf = xmalloc(rpc->alloc);
553 rpc->out = client.out;
554 strbuf_init(&rpc->result, 0);
556 strbuf_addf(&buf, "%s%s", url, svc);
557 rpc->service_url = strbuf_detach(&buf, NULL);
559 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
560 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
562 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
563 rpc->hdr_accept = strbuf_detach(&buf, NULL);
566 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
571 err |= post_rpc(rpc);
576 strbuf_read(&rpc->result, client.out, 0);
581 err |= finish_command(&client);
582 free(rpc->service_url);
583 free(rpc->hdr_content_type);
584 free(rpc->hdr_accept);
586 strbuf_release(&buf);
590 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
592 struct walker *walker;
593 char **targets = xmalloc(nr_heads * sizeof(char*));
597 die("dumb http transport does not support --depth");
598 for (i = 0; i < nr_heads; i++)
599 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
601 walker = get_http_walker(url);
603 walker->get_tree = 1;
604 walker->get_history = 1;
605 walker->get_verbosely = options.verbosity >= 3;
606 walker->get_recover = 0;
607 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
610 for (i = 0; i < nr_heads; i++)
614 return ret ? error("Fetch failed.") : 0;
617 static int fetch_git(struct discovery *heads,
618 int nr_heads, struct ref **to_fetch)
620 struct rpc_state rpc;
621 char *depth_arg = NULL;
623 int argc = 0, i, err;
625 argv = xmalloc((15 + nr_heads) * sizeof(char*));
626 argv[argc++] = "fetch-pack";
627 argv[argc++] = "--stateless-rpc";
628 argv[argc++] = "--lock-pack";
629 if (options.followtags)
630 argv[argc++] = "--include-tag";
632 argv[argc++] = "--thin";
633 if (options.verbosity >= 3) {
637 if (!options.progress)
638 argv[argc++] = "--no-progress";
640 struct strbuf buf = STRBUF_INIT;
641 strbuf_addf(&buf, "--depth=%lu", options.depth);
642 depth_arg = strbuf_detach(&buf, NULL);
643 argv[argc++] = depth_arg;
646 for (i = 0; i < nr_heads; i++) {
647 struct ref *ref = to_fetch[i];
648 if (!ref->name || !*ref->name)
649 die("cannot fetch by sha1 over smart http");
650 argv[argc++] = ref->name;
654 memset(&rpc, 0, sizeof(rpc));
655 rpc.service_name = "git-upload-pack",
657 rpc.gzip_request = 1;
659 err = rpc_service(&rpc, heads);
661 safe_write(1, rpc.result.buf, rpc.result.len);
662 strbuf_release(&rpc.result);
668 static int fetch(int nr_heads, struct ref **to_fetch)
670 struct discovery *d = discover_refs("git-upload-pack");
672 return fetch_git(d, nr_heads, to_fetch);
674 return fetch_dumb(nr_heads, to_fetch);
677 static void parse_fetch(struct strbuf *buf)
679 struct ref **to_fetch = NULL;
680 struct ref *list_head = NULL;
681 struct ref **list = &list_head;
682 int alloc_heads = 0, nr_heads = 0;
685 if (!prefixcmp(buf->buf, "fetch ")) {
686 char *p = buf->buf + strlen("fetch ");
689 unsigned char old_sha1[20];
691 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
692 die("protocol error: expected sha/ref, got %s'", p);
698 die("protocol error: expected sha/ref, got %s'", p);
700 ref = alloc_ref(name);
701 hashcpy(ref->old_sha1, old_sha1);
706 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
707 to_fetch[nr_heads++] = ref;
710 die("http transport does not support %s", buf->buf);
713 if (strbuf_getline(buf, stdin, '\n') == EOF)
719 if (fetch(nr_heads, to_fetch))
720 exit(128); /* error already reported */
721 free_refs(list_head);
729 static int push_dav(int nr_spec, char **specs)
731 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
734 argv[argc++] = "http-push";
735 argv[argc++] = "--helper-status";
737 argv[argc++] = "--dry-run";
738 if (options.verbosity > 1)
739 argv[argc++] = "--verbose";
741 for (i = 0; i < nr_spec; i++)
742 argv[argc++] = specs[i];
745 if (run_command_v_opt(argv, RUN_GIT_CMD))
746 die("git-%s failed", argv[0]);
751 static int push_git(struct discovery *heads, int nr_spec, char **specs)
753 struct rpc_state rpc;
755 int argc = 0, i, err;
757 argv = xmalloc((10 + nr_spec) * sizeof(char*));
758 argv[argc++] = "send-pack";
759 argv[argc++] = "--stateless-rpc";
760 argv[argc++] = "--helper-status";
762 argv[argc++] = "--thin";
764 argv[argc++] = "--dry-run";
765 if (options.verbosity < 0)
766 argv[argc++] = "--quiet";
767 else if (options.verbosity > 1)
768 argv[argc++] = "--verbose";
770 for (i = 0; i < nr_spec; i++)
771 argv[argc++] = specs[i];
774 memset(&rpc, 0, sizeof(rpc));
775 rpc.service_name = "git-receive-pack",
778 err = rpc_service(&rpc, heads);
780 safe_write(1, rpc.result.buf, rpc.result.len);
781 strbuf_release(&rpc.result);
786 static int push(int nr_spec, char **specs)
788 struct discovery *heads = discover_refs("git-receive-pack");
791 if (heads->proto_git)
792 ret = push_git(heads, nr_spec, specs);
794 ret = push_dav(nr_spec, specs);
795 free_discovery(heads);
799 static void parse_push(struct strbuf *buf)
802 int alloc_spec = 0, nr_spec = 0, i;
805 if (!prefixcmp(buf->buf, "push ")) {
806 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
807 specs[nr_spec++] = xstrdup(buf->buf + 5);
810 die("http transport does not support %s", buf->buf);
813 if (strbuf_getline(buf, stdin, '\n') == EOF)
819 if (push(nr_spec, specs))
820 exit(128); /* error already reported */
826 for (i = 0; i < nr_spec; i++)
831 int main(int argc, const char **argv)
833 struct strbuf buf = STRBUF_INIT;
836 git_extract_argv0_path(argv[0]);
837 setup_git_directory_gently(&nongit);
839 fprintf(stderr, "Remote needed\n");
843 options.verbosity = 1;
844 options.progress = !!isatty(2);
847 remote = remote_get(argv[1]);
850 end_url_with_slash(&buf, argv[2]);
852 end_url_with_slash(&buf, remote->url[0]);
855 url = strbuf_detach(&buf, NULL);
860 if (strbuf_getline(&buf, stdin, '\n') == EOF)
862 if (!prefixcmp(buf.buf, "fetch ")) {
864 die("Fetch attempted without a local repo");
867 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
868 int for_push = !!strstr(buf.buf + 4, "for-push");
869 output_refs(get_refs(for_push));
871 } else if (!prefixcmp(buf.buf, "push ")) {
874 } else if (!prefixcmp(buf.buf, "option ")) {
875 char *name = buf.buf + strlen("option ");
876 char *value = strchr(name, ' ');
884 result = set_option(name, value);
888 printf("error invalid value\n");
890 printf("unsupported\n");
893 } else if (!strcmp(buf.buf, "capabilities")) {