The third batch
[git.git] / remote-curl.c
blob5b447949228cbf853f35ff9c3cccd4ea7a0f8afc
1 #include "cache.h"
2 #include "config.h"
3 #include "remote.h"
4 #include "connect.h"
5 #include "strbuf.h"
6 #include "walker.h"
7 #include "http.h"
8 #include "exec-cmd.h"
9 #include "run-command.h"
10 #include "pkt-line.h"
11 #include "string-list.h"
12 #include "sideband.h"
13 #include "argv-array.h"
14 #include "credential.h"
15 #include "sha1-array.h"
16 #include "send-pack.h"
17 #include "protocol.h"
18 #include "quote.h"
20 static struct remote *remote;
21 /* always ends with a trailing slash */
22 static struct strbuf url = STRBUF_INIT;
24 struct options {
25 int verbosity;
26 unsigned long depth;
27 char *deepen_since;
28 struct string_list deepen_not;
29 struct string_list push_options;
30 char *filter;
31 unsigned progress : 1,
32 check_self_contained_and_connected : 1,
33 cloning : 1,
34 update_shallow : 1,
35 followtags : 1,
36 dry_run : 1,
37 thin : 1,
38 /* One of the SEND_PACK_PUSH_CERT_* constants. */
39 push_cert : 2,
40 deepen_relative : 1,
41 from_promisor : 1,
42 no_dependents : 1;
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")) {
50 char *end;
51 int v = strtol(value, &end, 10);
52 if (value == end || *end)
53 return -1;
54 options.verbosity = v;
55 return 0;
57 else if (!strcmp(name, "progress")) {
58 if (!strcmp(value, "true"))
59 options.progress = 1;
60 else if (!strcmp(value, "false"))
61 options.progress = 0;
62 else
63 return -1;
64 return 0;
66 else if (!strcmp(name, "depth")) {
67 char *end;
68 unsigned long v = strtoul(value, &end, 10);
69 if (value == end || *end)
70 return -1;
71 options.depth = v;
72 return 0;
74 else if (!strcmp(name, "deepen-since")) {
75 options.deepen_since = xstrdup(value);
76 return 0;
78 else if (!strcmp(name, "deepen-not")) {
79 string_list_append(&options.deepen_not, value);
80 return 0;
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;
87 else
88 return -1;
89 return 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;
96 else
97 return -1;
98 return 0;
100 else if (!strcmp(name, "dry-run")) {
101 if (!strcmp(value, "true"))
102 options.dry_run = 1;
103 else if (!strcmp(value, "false"))
104 options.dry_run = 0;
105 else
106 return -1;
107 return 0;
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;
114 else
115 return -1;
116 return 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);
123 return 0;
124 } else if (!strcmp(name, "cloning")) {
125 if (!strcmp(value, "true"))
126 options.cloning = 1;
127 else if (!strcmp(value, "false"))
128 options.cloning = 0;
129 else
130 return -1;
131 return 0;
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;
137 else
138 return -1;
139 return 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;
147 else
148 return -1;
149 return 0;
150 } else if (!strcmp(name, "push-option")) {
151 if (*value != '"')
152 string_list_append(&options.push_options, value);
153 else {
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));
160 return 0;
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;
170 else
171 return -1;
172 return 0;
173 #endif /* LIBCURL_VERSION_NUM >= 0x070a08 */
174 } else if (!strcmp(name, "from-promisor")) {
175 options.from_promisor = 1;
176 return 0;
177 } else if (!strcmp(name, "no-dependents")) {
178 options.no_dependents = 1;
179 return 0;
180 } else if (!strcmp(name, "filter")) {
181 options.filter = xstrdup(value);
182 return 0;
183 } else {
184 return 1 /* unsupported */;
188 struct discovery {
189 char *service;
190 char *buf_alloc;
191 char *buf;
192 size_t len;
193 struct ref *refs;
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 |
208 PACKET_READ_DIE_ON_ERR_PACKET);
210 heads->version = discover_version(&reader);
211 switch (heads->version) {
212 case protocol_v2:
214 * Do nothing. This isn't a list of refs but rather a
215 * capability advertisement. Client would have run
216 * 'stateless-connect' so we'll dump this capability listing
217 * and let them request the refs themselves.
219 break;
220 case protocol_v1:
221 case protocol_v0:
222 get_remote_heads(&reader, &list, for_push ? REF_NORMAL : 0,
223 NULL, &heads->shallow);
224 break;
225 case protocol_unknown_version:
226 BUG("unknown protocol version");
229 return list;
232 static struct ref *parse_info_refs(struct discovery *heads)
234 char *data, *start, *mid;
235 char *ref_name;
236 int i = 0;
238 struct ref *refs = NULL;
239 struct ref *ref = NULL;
240 struct ref *last_ref = NULL;
242 data = heads->buf;
243 start = NULL;
244 mid = data;
245 while (i < heads->len) {
246 if (!start) {
247 start = &data[i];
249 if (data[i] == '\t')
250 mid = &data[i];
251 if (data[i] == '\n') {
252 if (mid - start != 40)
253 die("%sinfo/refs not valid: is this a git repository?",
254 url.buf);
255 data[i] = 0;
256 ref_name = mid + 1;
257 ref = alloc_ref(ref_name);
258 get_oid_hex(start, &ref->old_oid);
259 if (!refs)
260 refs = ref;
261 if (last_ref)
262 last_ref->next = ref;
263 last_ref = ref;
264 start = NULL;
266 i++;
269 ref = alloc_ref("HEAD");
270 if (!http_fetch_ref(url.buf, ref) &&
271 !resolve_remote_symref(ref, refs)) {
272 ref->next = refs;
273 refs = ref;
274 } else {
275 free(ref);
278 return refs;
281 static void free_discovery(struct discovery *d)
283 if (d) {
284 if (d == last_discovery)
285 last_discovery = NULL;
286 free(d->shallow.oid);
287 free(d->buf_alloc);
288 free_refs(d->refs);
289 free(d->service);
290 free(d);
294 static int show_http_message(struct strbuf *type, struct strbuf *charset,
295 struct strbuf *msg)
297 const char *p, *eol;
300 * We only show text/plain parts, as other types are likely
301 * to be ugly to look at on the user's terminal.
303 if (strcmp(type->buf, "text/plain"))
304 return -1;
305 if (charset->len)
306 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
308 strbuf_trim(msg);
309 if (!msg->len)
310 return -1;
312 p = msg->buf;
313 do {
314 eol = strchrnul(p, '\n');
315 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
316 p = eol + 1;
317 } while(*eol);
318 return 0;
321 static int get_protocol_http_header(enum protocol_version version,
322 struct strbuf *header)
324 if (version > 0) {
325 strbuf_addf(header, GIT_PROTOCOL_HEADER ": version=%d",
326 version);
328 return 1;
331 return 0;
334 static void check_smart_http(struct discovery *d, const char *service,
335 struct strbuf *type)
337 const char *p;
338 struct packet_reader reader;
341 * If we don't see x-$service-advertisement, then it's not smart-http.
342 * But once we do, we commit to it and assume any other protocol
343 * violations are hard errors.
345 if (!skip_prefix(type->buf, "application/x-", &p) ||
346 !skip_prefix(p, service, &p) ||
347 strcmp(p, "-advertisement"))
348 return;
350 packet_reader_init(&reader, -1, d->buf, d->len,
351 PACKET_READ_CHOMP_NEWLINE |
352 PACKET_READ_DIE_ON_ERR_PACKET);
353 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
354 die("invalid server response; expected service, got flush packet");
356 if (skip_prefix(reader.line, "# service=", &p) && !strcmp(p, service)) {
358 * The header can include additional metadata lines, up
359 * until a packet flush marker. Ignore these now, but
360 * in the future we might start to scan them.
362 for (;;) {
363 packet_reader_read(&reader);
364 if (reader.pktlen <= 0) {
365 break;
370 * v0 smart http; callers expect us to soak up the
371 * service and header packets
373 d->buf = reader.src_buffer;
374 d->len = reader.src_len;
375 d->proto_git = 1;
377 } else if (!strcmp(reader.line, "version 2")) {
379 * v2 smart http; do not consume version packet, which will
380 * be handled elsewhere.
382 d->proto_git = 1;
384 } else {
385 die("invalid server response; got '%s'", reader.line);
389 static struct discovery *discover_refs(const char *service, int for_push)
391 struct strbuf type = STRBUF_INIT;
392 struct strbuf charset = STRBUF_INIT;
393 struct strbuf buffer = STRBUF_INIT;
394 struct strbuf refs_url = STRBUF_INIT;
395 struct strbuf effective_url = STRBUF_INIT;
396 struct strbuf protocol_header = STRBUF_INIT;
397 struct string_list extra_headers = STRING_LIST_INIT_DUP;
398 struct discovery *last = last_discovery;
399 int http_ret, maybe_smart = 0;
400 struct http_get_options http_options;
401 enum protocol_version version = get_protocol_version_config();
403 if (last && !strcmp(service, last->service))
404 return last;
405 free_discovery(last);
407 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
408 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
409 git_env_bool("GIT_SMART_HTTP", 1)) {
410 maybe_smart = 1;
411 if (!strchr(url.buf, '?'))
412 strbuf_addch(&refs_url, '?');
413 else
414 strbuf_addch(&refs_url, '&');
415 strbuf_addf(&refs_url, "service=%s", service);
419 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
420 * to perform a push, then fallback to v0 since the client doesn't know
421 * how to push yet using v2.
423 if (version == protocol_v2 && !strcmp("git-receive-pack", service))
424 version = protocol_v0;
426 /* Add the extra Git-Protocol header */
427 if (get_protocol_http_header(version, &protocol_header))
428 string_list_append(&extra_headers, protocol_header.buf);
430 memset(&http_options, 0, sizeof(http_options));
431 http_options.content_type = &type;
432 http_options.charset = &charset;
433 http_options.effective_url = &effective_url;
434 http_options.base_url = &url;
435 http_options.extra_headers = &extra_headers;
436 http_options.initial_request = 1;
437 http_options.no_cache = 1;
439 http_ret = http_get_strbuf(refs_url.buf, &buffer, &http_options);
440 switch (http_ret) {
441 case HTTP_OK:
442 break;
443 case HTTP_MISSING_TARGET:
444 show_http_message(&type, &charset, &buffer);
445 die("repository '%s' not found", url.buf);
446 case HTTP_NOAUTH:
447 show_http_message(&type, &charset, &buffer);
448 die("Authentication failed for '%s'", url.buf);
449 default:
450 show_http_message(&type, &charset, &buffer);
451 die("unable to access '%s': %s", url.buf, curl_errorstr);
454 if (options.verbosity && !starts_with(refs_url.buf, url.buf))
455 warning(_("redirecting to %s"), url.buf);
457 last= xcalloc(1, sizeof(*last_discovery));
458 last->service = xstrdup(service);
459 last->buf_alloc = strbuf_detach(&buffer, &last->len);
460 last->buf = last->buf_alloc;
462 if (maybe_smart)
463 check_smart_http(last, service, &type);
465 if (last->proto_git)
466 last->refs = parse_git_refs(last, for_push);
467 else
468 last->refs = parse_info_refs(last);
470 strbuf_release(&refs_url);
471 strbuf_release(&type);
472 strbuf_release(&charset);
473 strbuf_release(&effective_url);
474 strbuf_release(&buffer);
475 strbuf_release(&protocol_header);
476 string_list_clear(&extra_headers, 0);
477 last_discovery = last;
478 return last;
481 static struct ref *get_refs(int for_push)
483 struct discovery *heads;
485 if (for_push)
486 heads = discover_refs("git-receive-pack", for_push);
487 else
488 heads = discover_refs("git-upload-pack", for_push);
490 return heads->refs;
493 static void output_refs(struct ref *refs)
495 struct ref *posn;
496 for (posn = refs; posn; posn = posn->next) {
497 if (posn->symref)
498 printf("@%s %s\n", posn->symref, posn->name);
499 else
500 printf("%s %s\n", oid_to_hex(&posn->old_oid), posn->name);
502 printf("\n");
503 fflush(stdout);
506 struct rpc_state {
507 const char *service_name;
508 char *service_url;
509 char *hdr_content_type;
510 char *hdr_accept;
511 char *protocol_header;
512 char *buf;
513 size_t alloc;
514 size_t len;
515 size_t pos;
516 int in;
517 int out;
518 int any_written;
519 unsigned gzip_request : 1;
520 unsigned initial_buffer : 1;
523 * Whenever a pkt-line is read into buf, append the 4 characters
524 * denoting its length before appending the payload.
526 unsigned write_line_lengths : 1;
529 * Used by rpc_out; initialize to 0. This is true if a flush has been
530 * read, but the corresponding line length (if write_line_lengths is
531 * true) and EOF have not been sent to libcurl. Since each flush marks
532 * the end of a request, each flush must be completely sent before any
533 * further reading occurs.
535 unsigned flush_read_but_not_sent : 1;
539 * Appends the result of reading from rpc->out to the string represented by
540 * rpc->buf and rpc->len if there is enough space. Returns 1 if there was
541 * enough space, 0 otherwise.
543 * If rpc->write_line_lengths is true, appends the line length as a 4-byte
544 * hexadecimal string before appending the result described above.
546 * Writes the total number of bytes appended into appended.
548 static int rpc_read_from_out(struct rpc_state *rpc, int options,
549 size_t *appended,
550 enum packet_read_status *status) {
551 size_t left;
552 char *buf;
553 int pktlen_raw;
555 if (rpc->write_line_lengths) {
556 left = rpc->alloc - rpc->len - 4;
557 buf = rpc->buf + rpc->len + 4;
558 } else {
559 left = rpc->alloc - rpc->len;
560 buf = rpc->buf + rpc->len;
563 if (left < LARGE_PACKET_MAX)
564 return 0;
566 *status = packet_read_with_status(rpc->out, NULL, NULL, buf,
567 left, &pktlen_raw, options);
568 if (*status != PACKET_READ_EOF) {
569 *appended = pktlen_raw + (rpc->write_line_lengths ? 4 : 0);
570 rpc->len += *appended;
573 if (rpc->write_line_lengths) {
574 switch (*status) {
575 case PACKET_READ_EOF:
576 if (!(options & PACKET_READ_GENTLE_ON_EOF))
577 die("shouldn't have EOF when not gentle on EOF");
578 break;
579 case PACKET_READ_NORMAL:
580 set_packet_header(buf - 4, *appended);
581 break;
582 case PACKET_READ_DELIM:
583 memcpy(buf - 4, "0001", 4);
584 break;
585 case PACKET_READ_FLUSH:
586 memcpy(buf - 4, "0000", 4);
587 break;
591 return 1;
594 static size_t rpc_out(void *ptr, size_t eltsize,
595 size_t nmemb, void *buffer_)
597 size_t max = eltsize * nmemb;
598 struct rpc_state *rpc = buffer_;
599 size_t avail = rpc->len - rpc->pos;
600 enum packet_read_status status;
602 if (!avail) {
603 rpc->initial_buffer = 0;
604 rpc->len = 0;
605 rpc->pos = 0;
606 if (!rpc->flush_read_but_not_sent) {
607 if (!rpc_read_from_out(rpc, 0, &avail, &status))
608 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
609 if (status == PACKET_READ_FLUSH)
610 rpc->flush_read_but_not_sent = 1;
613 * If flush_read_but_not_sent is true, we have already read one
614 * full request but have not fully sent it + EOF, which is why
615 * we need to refrain from reading.
618 if (rpc->flush_read_but_not_sent) {
619 if (!avail) {
621 * The line length either does not need to be sent at
622 * all or has already been completely sent. Now we can
623 * return 0, indicating EOF, meaning that the flush has
624 * been fully sent.
626 rpc->flush_read_but_not_sent = 0;
627 return 0;
630 * If avail is non-zerp, the line length for the flush still
631 * hasn't been fully sent. Proceed with sending the line
632 * length.
636 if (max < avail)
637 avail = max;
638 memcpy(ptr, rpc->buf + rpc->pos, avail);
639 rpc->pos += avail;
640 return avail;
643 #ifndef NO_CURL_IOCTL
644 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
646 struct rpc_state *rpc = clientp;
648 switch (cmd) {
649 case CURLIOCMD_NOP:
650 return CURLIOE_OK;
652 case CURLIOCMD_RESTARTREAD:
653 if (rpc->initial_buffer) {
654 rpc->pos = 0;
655 return CURLIOE_OK;
657 error("unable to rewind rpc post data - try increasing http.postBuffer");
658 return CURLIOE_FAILRESTART;
660 default:
661 return CURLIOE_UNKNOWNCMD;
664 #endif
666 struct rpc_in_data {
667 struct rpc_state *rpc;
668 struct active_request_slot *slot;
672 * A callback for CURLOPT_WRITEFUNCTION. The return value is the bytes consumed
673 * from ptr.
675 static size_t rpc_in(char *ptr, size_t eltsize,
676 size_t nmemb, void *buffer_)
678 size_t size = eltsize * nmemb;
679 struct rpc_in_data *data = buffer_;
680 long response_code;
682 if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
683 &response_code) != CURLE_OK)
684 return size;
685 if (response_code >= 300)
686 return size;
687 if (size)
688 data->rpc->any_written = 1;
689 write_or_die(data->rpc->in, ptr, size);
690 return size;
693 static int run_slot(struct active_request_slot *slot,
694 struct slot_results *results)
696 int err;
697 struct slot_results results_buf;
699 if (!results)
700 results = &results_buf;
702 err = run_one_slot(slot, results);
704 if (err != HTTP_OK && err != HTTP_REAUTH) {
705 struct strbuf msg = STRBUF_INIT;
706 if (results->http_code && results->http_code != 200)
707 strbuf_addf(&msg, "HTTP %ld", results->http_code);
708 if (results->curl_result != CURLE_OK) {
709 if (msg.len)
710 strbuf_addch(&msg, ' ');
711 strbuf_addf(&msg, "curl %d", results->curl_result);
712 if (curl_errorstr[0]) {
713 strbuf_addch(&msg, ' ');
714 strbuf_addstr(&msg, curl_errorstr);
717 error("RPC failed; %s", msg.buf);
718 strbuf_release(&msg);
721 return err;
724 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
726 struct active_request_slot *slot;
727 struct curl_slist *headers = http_copy_default_headers();
728 struct strbuf buf = STRBUF_INIT;
729 int err;
731 slot = get_active_slot();
733 headers = curl_slist_append(headers, rpc->hdr_content_type);
734 headers = curl_slist_append(headers, rpc->hdr_accept);
736 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
737 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
738 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
739 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
740 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
741 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
742 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
743 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
744 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
746 err = run_slot(slot, results);
748 curl_slist_free_all(headers);
749 strbuf_release(&buf);
750 return err;
753 static curl_off_t xcurl_off_t(size_t len)
755 uintmax_t size = len;
756 if (size > maximum_signed_value_of_type(curl_off_t))
757 die("cannot handle pushes this big");
758 return (curl_off_t)size;
762 * If flush_received is true, do not attempt to read any more; just use what's
763 * in rpc->buf.
765 static int post_rpc(struct rpc_state *rpc, int flush_received)
767 struct active_request_slot *slot;
768 struct curl_slist *headers = http_copy_default_headers();
769 int use_gzip = rpc->gzip_request;
770 char *gzip_body = NULL;
771 size_t gzip_size = 0;
772 int err, large_request = 0;
773 int needs_100_continue = 0;
774 struct rpc_in_data rpc_in_data;
776 /* Try to load the entire request, if we can fit it into the
777 * allocated buffer space we can use HTTP/1.0 and avoid the
778 * chunked encoding mess.
780 if (!flush_received) {
781 while (1) {
782 size_t n;
783 enum packet_read_status status;
785 if (!rpc_read_from_out(rpc, 0, &n, &status)) {
786 large_request = 1;
787 use_gzip = 0;
788 break;
790 if (status == PACKET_READ_FLUSH)
791 break;
795 if (large_request) {
796 struct slot_results results;
798 do {
799 err = probe_rpc(rpc, &results);
800 if (err == HTTP_REAUTH)
801 credential_fill(&http_auth);
802 } while (err == HTTP_REAUTH);
803 if (err != HTTP_OK)
804 return -1;
806 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
807 needs_100_continue = 1;
810 headers = curl_slist_append(headers, rpc->hdr_content_type);
811 headers = curl_slist_append(headers, rpc->hdr_accept);
812 headers = curl_slist_append(headers, needs_100_continue ?
813 "Expect: 100-continue" : "Expect:");
815 /* Add the extra Git-Protocol header */
816 if (rpc->protocol_header)
817 headers = curl_slist_append(headers, rpc->protocol_header);
819 retry:
820 slot = get_active_slot();
822 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
823 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
824 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
825 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
827 if (large_request) {
828 /* The request body is large and the size cannot be predicted.
829 * We must use chunked encoding to send it.
831 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
832 rpc->initial_buffer = 1;
833 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
834 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
835 #ifndef NO_CURL_IOCTL
836 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
837 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
838 #endif
839 if (options.verbosity > 1) {
840 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
841 fflush(stderr);
844 } else if (gzip_body) {
846 * If we are looping to retry authentication, then the previous
847 * run will have set up the headers and gzip buffer already,
848 * and we just need to send it.
850 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
851 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
853 } else if (use_gzip && 1024 < rpc->len) {
854 /* The client backend isn't giving us compressed data so
855 * we can try to deflate it ourselves, this may save on
856 * the transfer time.
858 git_zstream stream;
859 int ret;
861 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
862 gzip_size = git_deflate_bound(&stream, rpc->len);
863 gzip_body = xmalloc(gzip_size);
865 stream.next_in = (unsigned char *)rpc->buf;
866 stream.avail_in = rpc->len;
867 stream.next_out = (unsigned char *)gzip_body;
868 stream.avail_out = gzip_size;
870 ret = git_deflate(&stream, Z_FINISH);
871 if (ret != Z_STREAM_END)
872 die("cannot deflate request; zlib deflate error %d", ret);
874 ret = git_deflate_end_gently(&stream);
875 if (ret != Z_OK)
876 die("cannot deflate request; zlib end error %d", ret);
878 gzip_size = stream.total_out;
880 headers = curl_slist_append(headers, "Content-Encoding: gzip");
881 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
882 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(gzip_size));
884 if (options.verbosity > 1) {
885 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
886 rpc->service_name,
887 (unsigned long)rpc->len, (unsigned long)gzip_size);
888 fflush(stderr);
890 } else {
891 /* We know the complete request size in advance, use the
892 * more normal Content-Length approach.
894 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
895 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE_LARGE, xcurl_off_t(rpc->len));
896 if (options.verbosity > 1) {
897 fprintf(stderr, "POST %s (%lu bytes)\n",
898 rpc->service_name, (unsigned long)rpc->len);
899 fflush(stderr);
903 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
904 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
905 rpc_in_data.rpc = rpc;
906 rpc_in_data.slot = slot;
907 curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
908 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
911 rpc->any_written = 0;
912 err = run_slot(slot, NULL);
913 if (err == HTTP_REAUTH && !large_request) {
914 credential_fill(&http_auth);
915 goto retry;
917 if (err != HTTP_OK)
918 err = -1;
920 if (!rpc->any_written)
921 err = -1;
923 curl_slist_free_all(headers);
924 free(gzip_body);
925 return err;
928 static int rpc_service(struct rpc_state *rpc, struct discovery *heads,
929 const char **client_argv, const struct strbuf *preamble,
930 struct strbuf *rpc_result)
932 const char *svc = rpc->service_name;
933 struct strbuf buf = STRBUF_INIT;
934 struct child_process client = CHILD_PROCESS_INIT;
935 int err = 0;
937 client.in = -1;
938 client.out = -1;
939 client.git_cmd = 1;
940 client.argv = client_argv;
941 if (start_command(&client))
942 exit(1);
943 write_or_die(client.in, preamble->buf, preamble->len);
944 if (heads)
945 write_or_die(client.in, heads->buf, heads->len);
947 rpc->alloc = http_post_buffer;
948 rpc->buf = xmalloc(rpc->alloc);
949 rpc->in = client.in;
950 rpc->out = client.out;
952 strbuf_addf(&buf, "%s%s", url.buf, svc);
953 rpc->service_url = strbuf_detach(&buf, NULL);
955 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
956 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
958 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
959 rpc->hdr_accept = strbuf_detach(&buf, NULL);
961 if (get_protocol_http_header(heads->version, &buf))
962 rpc->protocol_header = strbuf_detach(&buf, NULL);
963 else
964 rpc->protocol_header = NULL;
966 while (!err) {
967 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
968 if (!n)
969 break;
970 rpc->pos = 0;
971 rpc->len = n;
972 err |= post_rpc(rpc, 0);
975 close(client.in);
976 client.in = -1;
977 if (!err) {
978 strbuf_read(rpc_result, client.out, 0);
979 } else {
980 char buf[4096];
981 for (;;)
982 if (xread(client.out, buf, sizeof(buf)) <= 0)
983 break;
986 close(client.out);
987 client.out = -1;
989 err |= finish_command(&client);
990 free(rpc->service_url);
991 free(rpc->hdr_content_type);
992 free(rpc->hdr_accept);
993 free(rpc->protocol_header);
994 free(rpc->buf);
995 strbuf_release(&buf);
996 return err;
999 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
1001 struct walker *walker;
1002 char **targets;
1003 int ret, i;
1005 ALLOC_ARRAY(targets, nr_heads);
1006 if (options.depth || options.deepen_since)
1007 die("dumb http transport does not support shallow capabilities");
1008 for (i = 0; i < nr_heads; i++)
1009 targets[i] = xstrdup(oid_to_hex(&to_fetch[i]->old_oid));
1011 walker = get_http_walker(url.buf);
1012 walker->get_verbosely = options.verbosity >= 3;
1013 walker->get_recover = 0;
1014 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
1015 walker_free(walker);
1017 for (i = 0; i < nr_heads; i++)
1018 free(targets[i]);
1019 free(targets);
1021 return ret ? error("fetch failed.") : 0;
1024 static int fetch_git(struct discovery *heads,
1025 int nr_heads, struct ref **to_fetch)
1027 struct rpc_state rpc;
1028 struct strbuf preamble = STRBUF_INIT;
1029 int i, err;
1030 struct argv_array args = ARGV_ARRAY_INIT;
1031 struct strbuf rpc_result = STRBUF_INIT;
1033 argv_array_pushl(&args, "fetch-pack", "--stateless-rpc",
1034 "--stdin", "--lock-pack", NULL);
1035 if (options.followtags)
1036 argv_array_push(&args, "--include-tag");
1037 if (options.thin)
1038 argv_array_push(&args, "--thin");
1039 if (options.verbosity >= 3)
1040 argv_array_pushl(&args, "-v", "-v", NULL);
1041 if (options.check_self_contained_and_connected)
1042 argv_array_push(&args, "--check-self-contained-and-connected");
1043 if (options.cloning)
1044 argv_array_push(&args, "--cloning");
1045 if (options.update_shallow)
1046 argv_array_push(&args, "--update-shallow");
1047 if (!options.progress)
1048 argv_array_push(&args, "--no-progress");
1049 if (options.depth)
1050 argv_array_pushf(&args, "--depth=%lu", options.depth);
1051 if (options.deepen_since)
1052 argv_array_pushf(&args, "--shallow-since=%s", options.deepen_since);
1053 for (i = 0; i < options.deepen_not.nr; i++)
1054 argv_array_pushf(&args, "--shallow-exclude=%s",
1055 options.deepen_not.items[i].string);
1056 if (options.deepen_relative && options.depth)
1057 argv_array_push(&args, "--deepen-relative");
1058 if (options.from_promisor)
1059 argv_array_push(&args, "--from-promisor");
1060 if (options.no_dependents)
1061 argv_array_push(&args, "--no-dependents");
1062 if (options.filter)
1063 argv_array_pushf(&args, "--filter=%s", options.filter);
1064 argv_array_push(&args, url.buf);
1066 for (i = 0; i < nr_heads; i++) {
1067 struct ref *ref = to_fetch[i];
1068 if (!*ref->name)
1069 die("cannot fetch by sha1 over smart http");
1070 packet_buf_write(&preamble, "%s %s\n",
1071 oid_to_hex(&ref->old_oid), ref->name);
1073 packet_buf_flush(&preamble);
1075 memset(&rpc, 0, sizeof(rpc));
1076 rpc.service_name = "git-upload-pack",
1077 rpc.gzip_request = 1;
1079 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
1080 if (rpc_result.len)
1081 write_or_die(1, rpc_result.buf, rpc_result.len);
1082 strbuf_release(&rpc_result);
1083 strbuf_release(&preamble);
1084 argv_array_clear(&args);
1085 return err;
1088 static int fetch(int nr_heads, struct ref **to_fetch)
1090 struct discovery *d = discover_refs("git-upload-pack", 0);
1091 if (d->proto_git)
1092 return fetch_git(d, nr_heads, to_fetch);
1093 else
1094 return fetch_dumb(nr_heads, to_fetch);
1097 static void parse_fetch(struct strbuf *buf)
1099 struct ref **to_fetch = NULL;
1100 struct ref *list_head = NULL;
1101 struct ref **list = &list_head;
1102 int alloc_heads = 0, nr_heads = 0;
1104 do {
1105 const char *p;
1106 if (skip_prefix(buf->buf, "fetch ", &p)) {
1107 const char *name;
1108 struct ref *ref;
1109 struct object_id old_oid;
1111 if (get_oid_hex(p, &old_oid))
1112 die("protocol error: expected sha/ref, got %s'", p);
1113 if (p[GIT_SHA1_HEXSZ] == ' ')
1114 name = p + GIT_SHA1_HEXSZ + 1;
1115 else if (!p[GIT_SHA1_HEXSZ])
1116 name = "";
1117 else
1118 die("protocol error: expected sha/ref, got %s'", p);
1120 ref = alloc_ref(name);
1121 oidcpy(&ref->old_oid, &old_oid);
1123 *list = ref;
1124 list = &ref->next;
1126 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
1127 to_fetch[nr_heads++] = ref;
1129 else
1130 die("http transport does not support %s", buf->buf);
1132 strbuf_reset(buf);
1133 if (strbuf_getline_lf(buf, stdin) == EOF)
1134 return;
1135 if (!*buf->buf)
1136 break;
1137 } while (1);
1139 if (fetch(nr_heads, to_fetch))
1140 exit(128); /* error already reported */
1141 free_refs(list_head);
1142 free(to_fetch);
1144 printf("\n");
1145 fflush(stdout);
1146 strbuf_reset(buf);
1149 static int push_dav(int nr_spec, char **specs)
1151 struct child_process child = CHILD_PROCESS_INIT;
1152 size_t i;
1154 child.git_cmd = 1;
1155 argv_array_push(&child.args, "http-push");
1156 argv_array_push(&child.args, "--helper-status");
1157 if (options.dry_run)
1158 argv_array_push(&child.args, "--dry-run");
1159 if (options.verbosity > 1)
1160 argv_array_push(&child.args, "--verbose");
1161 argv_array_push(&child.args, url.buf);
1162 for (i = 0; i < nr_spec; i++)
1163 argv_array_push(&child.args, specs[i]);
1165 if (run_command(&child))
1166 die("git-http-push failed");
1167 return 0;
1170 static int push_git(struct discovery *heads, int nr_spec, char **specs)
1172 struct rpc_state rpc;
1173 int i, err;
1174 struct argv_array args;
1175 struct string_list_item *cas_option;
1176 struct strbuf preamble = STRBUF_INIT;
1177 struct strbuf rpc_result = STRBUF_INIT;
1179 argv_array_init(&args);
1180 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
1181 NULL);
1183 if (options.thin)
1184 argv_array_push(&args, "--thin");
1185 if (options.dry_run)
1186 argv_array_push(&args, "--dry-run");
1187 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
1188 argv_array_push(&args, "--signed=yes");
1189 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
1190 argv_array_push(&args, "--signed=if-asked");
1191 if (options.verbosity == 0)
1192 argv_array_push(&args, "--quiet");
1193 else if (options.verbosity > 1)
1194 argv_array_push(&args, "--verbose");
1195 for (i = 0; i < options.push_options.nr; i++)
1196 argv_array_pushf(&args, "--push-option=%s",
1197 options.push_options.items[i].string);
1198 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
1199 for_each_string_list_item(cas_option, &cas_options)
1200 argv_array_push(&args, cas_option->string);
1201 argv_array_push(&args, url.buf);
1203 argv_array_push(&args, "--stdin");
1204 for (i = 0; i < nr_spec; i++)
1205 packet_buf_write(&preamble, "%s\n", specs[i]);
1206 packet_buf_flush(&preamble);
1208 memset(&rpc, 0, sizeof(rpc));
1209 rpc.service_name = "git-receive-pack",
1211 err = rpc_service(&rpc, heads, args.argv, &preamble, &rpc_result);
1212 if (rpc_result.len)
1213 write_or_die(1, rpc_result.buf, rpc_result.len);
1214 strbuf_release(&rpc_result);
1215 strbuf_release(&preamble);
1216 argv_array_clear(&args);
1217 return err;
1220 static int push(int nr_spec, char **specs)
1222 struct discovery *heads = discover_refs("git-receive-pack", 1);
1223 int ret;
1225 if (heads->proto_git)
1226 ret = push_git(heads, nr_spec, specs);
1227 else
1228 ret = push_dav(nr_spec, specs);
1229 free_discovery(heads);
1230 return ret;
1233 static void parse_push(struct strbuf *buf)
1235 char **specs = NULL;
1236 int alloc_spec = 0, nr_spec = 0, i, ret;
1238 do {
1239 if (starts_with(buf->buf, "push ")) {
1240 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
1241 specs[nr_spec++] = xstrdup(buf->buf + 5);
1243 else
1244 die("http transport does not support %s", buf->buf);
1246 strbuf_reset(buf);
1247 if (strbuf_getline_lf(buf, stdin) == EOF)
1248 goto free_specs;
1249 if (!*buf->buf)
1250 break;
1251 } while (1);
1253 ret = push(nr_spec, specs);
1254 printf("\n");
1255 fflush(stdout);
1257 if (ret)
1258 exit(128); /* error already reported */
1260 free_specs:
1261 for (i = 0; i < nr_spec; i++)
1262 free(specs[i]);
1263 free(specs);
1266 static int stateless_connect(const char *service_name)
1268 struct discovery *discover;
1269 struct rpc_state rpc;
1270 struct strbuf buf = STRBUF_INIT;
1273 * Run the info/refs request and see if the server supports protocol
1274 * v2. If and only if the server supports v2 can we successfully
1275 * establish a stateless connection, otherwise we need to tell the
1276 * client to fallback to using other transport helper functions to
1277 * complete their request.
1279 discover = discover_refs(service_name, 0);
1280 if (discover->version != protocol_v2) {
1281 printf("fallback\n");
1282 fflush(stdout);
1283 return -1;
1284 } else {
1285 /* Stateless Connection established */
1286 printf("\n");
1287 fflush(stdout);
1290 rpc.service_name = service_name;
1291 rpc.service_url = xstrfmt("%s%s", url.buf, rpc.service_name);
1292 rpc.hdr_content_type = xstrfmt("Content-Type: application/x-%s-request", rpc.service_name);
1293 rpc.hdr_accept = xstrfmt("Accept: application/x-%s-result", rpc.service_name);
1294 if (get_protocol_http_header(discover->version, &buf)) {
1295 rpc.protocol_header = strbuf_detach(&buf, NULL);
1296 } else {
1297 rpc.protocol_header = NULL;
1298 strbuf_release(&buf);
1300 rpc.buf = xmalloc(http_post_buffer);
1301 rpc.alloc = http_post_buffer;
1302 rpc.len = 0;
1303 rpc.pos = 0;
1304 rpc.in = 1;
1305 rpc.out = 0;
1306 rpc.any_written = 0;
1307 rpc.gzip_request = 1;
1308 rpc.initial_buffer = 0;
1309 rpc.write_line_lengths = 1;
1310 rpc.flush_read_but_not_sent = 0;
1313 * Dump the capability listing that we got from the server earlier
1314 * during the info/refs request.
1316 write_or_die(rpc.in, discover->buf, discover->len);
1318 /* Until we see EOF keep sending POSTs */
1319 while (1) {
1320 size_t avail;
1321 enum packet_read_status status;
1323 if (!rpc_read_from_out(&rpc, PACKET_READ_GENTLE_ON_EOF, &avail,
1324 &status))
1325 BUG("The entire rpc->buf should be larger than LARGE_PACKET_MAX");
1326 if (status == PACKET_READ_EOF)
1327 break;
1328 if (post_rpc(&rpc, status == PACKET_READ_FLUSH))
1329 /* We would have an err here */
1330 break;
1331 /* Reset the buffer for next request */
1332 rpc.len = 0;
1335 free(rpc.service_url);
1336 free(rpc.hdr_content_type);
1337 free(rpc.hdr_accept);
1338 free(rpc.protocol_header);
1339 free(rpc.buf);
1340 strbuf_release(&buf);
1342 return 0;
1345 int cmd_main(int argc, const char **argv)
1347 struct strbuf buf = STRBUF_INIT;
1348 int nongit;
1350 setup_git_directory_gently(&nongit);
1351 if (argc < 2) {
1352 error("remote-curl: usage: git remote-curl <remote> [<url>]");
1353 return 1;
1356 options.verbosity = 1;
1357 options.progress = !!isatty(2);
1358 options.thin = 1;
1359 string_list_init(&options.deepen_not, 1);
1360 string_list_init(&options.push_options, 1);
1363 * Just report "remote-curl" here (folding all the various aliases
1364 * ("git-remote-http", "git-remote-https", and etc.) here since they
1365 * are all just copies of the same actual executable.
1367 trace2_cmd_name("remote-curl");
1369 remote = remote_get(argv[1]);
1371 if (argc > 2) {
1372 end_url_with_slash(&url, argv[2]);
1373 } else {
1374 end_url_with_slash(&url, remote->url[0]);
1377 http_init(remote, url.buf, 0);
1379 do {
1380 const char *arg;
1382 if (strbuf_getline_lf(&buf, stdin) == EOF) {
1383 if (ferror(stdin))
1384 error("remote-curl: error reading command stream from git");
1385 return 1;
1387 if (buf.len == 0)
1388 break;
1389 if (starts_with(buf.buf, "fetch ")) {
1390 if (nongit)
1391 die("remote-curl: fetch attempted without a local repo");
1392 parse_fetch(&buf);
1394 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1395 int for_push = !!strstr(buf.buf + 4, "for-push");
1396 output_refs(get_refs(for_push));
1398 } else if (starts_with(buf.buf, "push ")) {
1399 parse_push(&buf);
1401 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1402 char *value = strchr(arg, ' ');
1403 int result;
1405 if (value)
1406 *value++ = '\0';
1407 else
1408 value = "true";
1410 result = set_option(arg, value);
1411 if (!result)
1412 printf("ok\n");
1413 else if (result < 0)
1414 printf("error invalid value\n");
1415 else
1416 printf("unsupported\n");
1417 fflush(stdout);
1419 } else if (!strcmp(buf.buf, "capabilities")) {
1420 printf("stateless-connect\n");
1421 printf("fetch\n");
1422 printf("option\n");
1423 printf("push\n");
1424 printf("check-connectivity\n");
1425 printf("\n");
1426 fflush(stdout);
1427 } else if (skip_prefix(buf.buf, "stateless-connect ", &arg)) {
1428 if (!stateless_connect(arg))
1429 break;
1430 } else {
1431 error("remote-curl: unknown command '%s' from git", buf.buf);
1432 return 1;
1434 strbuf_reset(&buf);
1435 } while (1);
1437 http_cleanup();
1439 return 0;