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Commit | Line | Data |
---|---|---|
6eb7ed54 DB |
1 | #include "cache.h" |
2 | #include "commit.h" | |
271421cd | 3 | #include "pack.h" |
215a7ad1 | 4 | #include "fetch.h" |
29508e1e | 5 | #include "http.h" |
7baa3e86 | 6 | |
49a0f240 NH |
7 | #define PREV_BUF_SIZE 4096 |
8 | #define RANGE_HEADER_SIZE 30 | |
9 | ||
acc075a8 | 10 | static int got_alternates = -1; |
1d389ab6 | 11 | |
1db69b57 | 12 | static struct curl_slist *no_pragma_header; |
6eb7ed54 | 13 | |
b3661567 DB |
14 | struct alt_base |
15 | { | |
16 | char *base; | |
17 | int got_indices; | |
18 | struct packed_git *packs; | |
19 | struct alt_base *next; | |
20 | }; | |
21 | ||
a7928f8e | 22 | static struct alt_base *alt = NULL; |
6eb7ed54 | 23 | |
1d389ab6 NH |
24 | enum transfer_state { |
25 | WAITING, | |
26 | ABORTED, | |
27 | ACTIVE, | |
28 | COMPLETE, | |
29 | }; | |
6eb7ed54 | 30 | |
1d389ab6 NH |
31 | struct transfer_request |
32 | { | |
33 | unsigned char sha1[20]; | |
34 | struct alt_base *repo; | |
35 | char *url; | |
36 | char filename[PATH_MAX]; | |
37 | char tmpfile[PATH_MAX]; | |
38 | int local; | |
39 | enum transfer_state state; | |
40 | CURLcode curl_result; | |
41 | char errorstr[CURL_ERROR_SIZE]; | |
42 | long http_code; | |
43 | unsigned char real_sha1[20]; | |
44 | SHA_CTX c; | |
45 | z_stream stream; | |
46 | int zret; | |
47 | int rename; | |
48 | struct active_request_slot *slot; | |
49 | struct transfer_request *next; | |
50 | }; | |
51 | ||
acc075a8 NH |
52 | struct alt_request { |
53 | char *base; | |
54 | char *url; | |
55 | struct buffer *buffer; | |
56 | struct active_request_slot *slot; | |
57 | int http_specific; | |
58 | }; | |
59 | ||
1d389ab6 | 60 | static struct transfer_request *request_queue_head = NULL; |
bc8f2652 | 61 | |
182005b9 DB |
62 | static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, |
63 | void *data) | |
64 | { | |
bf0f910d | 65 | unsigned char expn[4096]; |
6eb7ed54 DB |
66 | size_t size = eltsize * nmemb; |
67 | int posn = 0; | |
1d389ab6 | 68 | struct transfer_request *request = (struct transfer_request *)data; |
6eb7ed54 | 69 | do { |
1d389ab6 NH |
70 | ssize_t retval = write(request->local, |
71 | ptr + posn, size - posn); | |
6eb7ed54 DB |
72 | if (retval < 0) |
73 | return posn; | |
74 | posn += retval; | |
75 | } while (posn < size); | |
76 | ||
1d389ab6 NH |
77 | request->stream.avail_in = size; |
78 | request->stream.next_in = ptr; | |
6eb7ed54 | 79 | do { |
1d389ab6 NH |
80 | request->stream.next_out = expn; |
81 | request->stream.avail_out = sizeof(expn); | |
82 | request->zret = inflate(&request->stream, Z_SYNC_FLUSH); | |
83 | SHA1_Update(&request->c, expn, | |
84 | sizeof(expn) - request->stream.avail_out); | |
85 | } while (request->stream.avail_in && request->zret == Z_OK); | |
86 | data_received++; | |
6eb7ed54 DB |
87 | return size; |
88 | } | |
89 | ||
acc075a8 | 90 | static void fetch_alternates(char *base); |
1d389ab6 | 91 | |
29508e1e | 92 | static void process_object_response(void *callback_data); |
1d389ab6 | 93 | |
f5dce806 | 94 | static void start_request(struct transfer_request *request) |
1d389ab6 NH |
95 | { |
96 | char *hex = sha1_to_hex(request->sha1); | |
97 | char prevfile[PATH_MAX]; | |
98 | char *url; | |
99 | char *posn; | |
100 | int prevlocal; | |
101 | unsigned char prev_buf[PREV_BUF_SIZE]; | |
102 | ssize_t prev_read = 0; | |
103 | long prev_posn = 0; | |
104 | char range[RANGE_HEADER_SIZE]; | |
105 | struct curl_slist *range_header = NULL; | |
106 | struct active_request_slot *slot; | |
107 | ||
108 | snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename); | |
109 | unlink(prevfile); | |
110 | rename(request->tmpfile, prevfile); | |
111 | unlink(request->tmpfile); | |
112 | ||
313c4714 PB |
113 | if (request->local != -1) |
114 | error("fd leakage in start: %d", request->local); | |
1d389ab6 NH |
115 | request->local = open(request->tmpfile, |
116 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
b721e01f JH |
117 | /* This could have failed due to the "lazy directory creation"; |
118 | * try to mkdir the last path component. | |
119 | */ | |
120 | if (request->local < 0 && errno == ENOENT) { | |
121 | char *dir = strrchr(request->tmpfile, '/'); | |
122 | if (dir) { | |
123 | *dir = 0; | |
124 | mkdir(request->tmpfile, 0777); | |
125 | *dir = '/'; | |
126 | } | |
127 | request->local = open(request->tmpfile, | |
128 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
129 | } | |
130 | ||
1d389ab6 NH |
131 | if (request->local < 0) { |
132 | request->state = ABORTED; | |
133 | error("Couldn't create temporary file %s for %s: %s\n", | |
134 | request->tmpfile, request->filename, strerror(errno)); | |
135 | return; | |
136 | } | |
137 | ||
138 | memset(&request->stream, 0, sizeof(request->stream)); | |
139 | ||
140 | inflateInit(&request->stream); | |
141 | ||
142 | SHA1_Init(&request->c); | |
143 | ||
144 | url = xmalloc(strlen(request->repo->base) + 50); | |
145 | request->url = xmalloc(strlen(request->repo->base) + 50); | |
146 | strcpy(url, request->repo->base); | |
147 | posn = url + strlen(request->repo->base); | |
148 | strcpy(posn, "objects/"); | |
149 | posn += 8; | |
150 | memcpy(posn, hex, 2); | |
151 | posn += 2; | |
152 | *(posn++) = '/'; | |
153 | strcpy(posn, hex + 2); | |
154 | strcpy(request->url, url); | |
155 | ||
156 | /* If a previous temp file is present, process what was already | |
157 | fetched. */ | |
158 | prevlocal = open(prevfile, O_RDONLY); | |
159 | if (prevlocal != -1) { | |
160 | do { | |
161 | prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE); | |
162 | if (prev_read>0) { | |
163 | if (fwrite_sha1_file(prev_buf, | |
164 | 1, | |
165 | prev_read, | |
166 | request) == prev_read) { | |
167 | prev_posn += prev_read; | |
168 | } else { | |
169 | prev_read = -1; | |
170 | } | |
171 | } | |
172 | } while (prev_read > 0); | |
173 | close(prevlocal); | |
174 | } | |
175 | unlink(prevfile); | |
176 | ||
177 | /* Reset inflate/SHA1 if there was an error reading the previous temp | |
178 | file; also rewind to the beginning of the local file. */ | |
179 | if (prev_read == -1) { | |
180 | memset(&request->stream, 0, sizeof(request->stream)); | |
181 | inflateInit(&request->stream); | |
182 | SHA1_Init(&request->c); | |
183 | if (prev_posn>0) { | |
184 | prev_posn = 0; | |
185 | lseek(request->local, SEEK_SET, 0); | |
186 | ftruncate(request->local, 0); | |
187 | } | |
188 | } | |
189 | ||
190 | slot = get_active_slot(); | |
29508e1e NH |
191 | slot->callback_func = process_object_response; |
192 | slot->callback_data = request; | |
193 | request->slot = slot; | |
194 | ||
1d389ab6 NH |
195 | curl_easy_setopt(slot->curl, CURLOPT_FILE, request); |
196 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); | |
197 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr); | |
198 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
03126006 | 199 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); |
1d389ab6 NH |
200 | |
201 | /* If we have successfully processed data from a previous fetch | |
202 | attempt, only fetch the data we don't already have. */ | |
203 | if (prev_posn>0) { | |
204 | if (get_verbosely) | |
205 | fprintf(stderr, | |
206 | "Resuming fetch of object %s at byte %ld\n", | |
207 | hex, prev_posn); | |
208 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
209 | range_header = curl_slist_append(range_header, range); | |
210 | curl_easy_setopt(slot->curl, | |
211 | CURLOPT_HTTPHEADER, range_header); | |
212 | } | |
213 | ||
a7a8d378 | 214 | /* Try to get the request started, abort the request on error */ |
29508e1e | 215 | request->state = ACTIVE; |
1d389ab6 NH |
216 | if (!start_active_slot(slot)) { |
217 | request->state = ABORTED; | |
29508e1e | 218 | request->slot = NULL; |
313c4714 | 219 | close(request->local); request->local = -1; |
1d389ab6 | 220 | free(request->url); |
1d389ab6 | 221 | } |
1d389ab6 NH |
222 | } |
223 | ||
f5dce806 | 224 | static void finish_request(struct transfer_request *request) |
1d389ab6 | 225 | { |
50496b21 NH |
226 | struct stat st; |
227 | ||
1d389ab6 | 228 | fchmod(request->local, 0444); |
313c4714 | 229 | close(request->local); request->local = -1; |
1d389ab6 NH |
230 | |
231 | if (request->http_code == 416) { | |
232 | fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); | |
233 | } else if (request->curl_result != CURLE_OK) { | |
50496b21 NH |
234 | if (stat(request->tmpfile, &st) == 0) |
235 | if (st.st_size == 0) | |
236 | unlink(request->tmpfile); | |
1d389ab6 NH |
237 | return; |
238 | } | |
239 | ||
240 | inflateEnd(&request->stream); | |
241 | SHA1_Final(request->real_sha1, &request->c); | |
242 | if (request->zret != Z_STREAM_END) { | |
243 | unlink(request->tmpfile); | |
244 | return; | |
245 | } | |
246 | if (memcmp(request->sha1, request->real_sha1, 20)) { | |
247 | unlink(request->tmpfile); | |
248 | return; | |
249 | } | |
250 | request->rename = | |
b721e01f | 251 | move_temp_to_file(request->tmpfile, request->filename); |
1d389ab6 NH |
252 | |
253 | if (request->rename == 0) | |
254 | pull_say("got %s\n", sha1_to_hex(request->sha1)); | |
255 | } | |
256 | ||
29508e1e NH |
257 | static void process_object_response(void *callback_data) |
258 | { | |
259 | struct transfer_request *request = | |
260 | (struct transfer_request *)callback_data; | |
261 | ||
262 | request->curl_result = request->slot->curl_result; | |
263 | request->http_code = request->slot->http_code; | |
264 | request->slot = NULL; | |
265 | request->state = COMPLETE; | |
266 | ||
267 | /* Use alternates if necessary */ | |
268 | if (request->http_code == 404) { | |
269 | fetch_alternates(alt->base); | |
270 | if (request->repo->next != NULL) { | |
271 | request->repo = | |
272 | request->repo->next; | |
273 | close(request->local); | |
274 | request->local = -1; | |
275 | start_request(request); | |
276 | return; | |
277 | } | |
278 | } | |
279 | ||
280 | finish_request(request); | |
281 | } | |
282 | ||
f5dce806 | 283 | static void release_request(struct transfer_request *request) |
1d389ab6 NH |
284 | { |
285 | struct transfer_request *entry = request_queue_head; | |
286 | ||
313c4714 PB |
287 | if (request->local != -1) |
288 | error("fd leakage in release: %d", request->local); | |
1d389ab6 NH |
289 | if (request == request_queue_head) { |
290 | request_queue_head = request->next; | |
291 | } else { | |
292 | while (entry->next != NULL && entry->next != request) | |
293 | entry = entry->next; | |
294 | if (entry->next == request) | |
295 | entry->next = entry->next->next; | |
296 | } | |
297 | ||
298 | free(request->url); | |
299 | free(request); | |
300 | } | |
301 | ||
a7a8d378 | 302 | #ifdef USE_CURL_MULTI |
29508e1e | 303 | void fill_active_slots(void) |
1d389ab6 NH |
304 | { |
305 | struct transfer_request *request = request_queue_head; | |
f1a906a3 | 306 | struct active_request_slot *slot = active_queue_head; |
1d389ab6 NH |
307 | int num_transfers; |
308 | ||
309 | while (active_requests < max_requests && request != NULL) { | |
310 | if (request->state == WAITING) { | |
11f0dafe NH |
311 | if (has_sha1_file(request->sha1)) |
312 | release_request(request); | |
313 | else | |
314 | start_request(request); | |
1d389ab6 NH |
315 | curl_multi_perform(curlm, &num_transfers); |
316 | } | |
317 | request = request->next; | |
318 | } | |
f1a906a3 NH |
319 | |
320 | while (slot != NULL) { | |
321 | if (!slot->in_use && slot->curl != NULL) { | |
322 | curl_easy_cleanup(slot->curl); | |
323 | slot->curl = NULL; | |
324 | } | |
325 | slot = slot->next; | |
326 | } | |
1d389ab6 | 327 | } |
a7a8d378 | 328 | #endif |
1d389ab6 NH |
329 | |
330 | void prefetch(unsigned char *sha1) | |
331 | { | |
332 | struct transfer_request *newreq; | |
333 | struct transfer_request *tail; | |
334 | char *filename = sha1_file_name(sha1); | |
335 | ||
336 | newreq = xmalloc(sizeof(*newreq)); | |
337 | memcpy(newreq->sha1, sha1, 20); | |
338 | newreq->repo = alt; | |
339 | newreq->url = NULL; | |
340 | newreq->local = -1; | |
341 | newreq->state = WAITING; | |
342 | snprintf(newreq->filename, sizeof(newreq->filename), "%s", filename); | |
343 | snprintf(newreq->tmpfile, sizeof(newreq->tmpfile), | |
344 | "%s.temp", filename); | |
345 | newreq->next = NULL; | |
346 | ||
347 | if (request_queue_head == NULL) { | |
348 | request_queue_head = newreq; | |
349 | } else { | |
350 | tail = request_queue_head; | |
351 | while (tail->next != NULL) { | |
352 | tail = tail->next; | |
353 | } | |
354 | tail->next = newreq; | |
355 | } | |
29508e1e | 356 | |
a7a8d378 | 357 | #ifdef USE_CURL_MULTI |
29508e1e NH |
358 | fill_active_slots(); |
359 | step_active_slots(); | |
a7a8d378 | 360 | #endif |
1d389ab6 NH |
361 | } |
362 | ||
b3661567 | 363 | static int fetch_index(struct alt_base *repo, unsigned char *sha1) |
182005b9 | 364 | { |
1d389ab6 | 365 | char *hex = sha1_to_hex(sha1); |
182005b9 DB |
366 | char *filename; |
367 | char *url; | |
49a0f240 | 368 | char tmpfile[PATH_MAX]; |
49a0f240 NH |
369 | long prev_posn = 0; |
370 | char range[RANGE_HEADER_SIZE]; | |
371 | struct curl_slist *range_header = NULL; | |
182005b9 DB |
372 | |
373 | FILE *indexfile; | |
1d389ab6 | 374 | struct active_request_slot *slot; |
182005b9 DB |
375 | |
376 | if (has_pack_index(sha1)) | |
377 | return 0; | |
378 | ||
379 | if (get_verbosely) | |
1d389ab6 | 380 | fprintf(stderr, "Getting index for pack %s\n", hex); |
182005b9 | 381 | |
b3661567 | 382 | url = xmalloc(strlen(repo->base) + 64); |
1d389ab6 | 383 | sprintf(url, "%s/objects/pack/pack-%s.idx", repo->base, hex); |
182005b9 DB |
384 | |
385 | filename = sha1_pack_index_name(sha1); | |
49a0f240 NH |
386 | snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename); |
387 | indexfile = fopen(tmpfile, "a"); | |
182005b9 DB |
388 | if (!indexfile) |
389 | return error("Unable to open local file %s for pack index", | |
390 | filename); | |
391 | ||
1d389ab6 NH |
392 | slot = get_active_slot(); |
393 | curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile); | |
394 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
395 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
03126006 | 396 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); |
1d389ab6 NH |
397 | slot->local = indexfile; |
398 | ||
49a0f240 NH |
399 | /* If there is data present from a previous transfer attempt, |
400 | resume where it left off */ | |
401 | prev_posn = ftell(indexfile); | |
402 | if (prev_posn>0) { | |
403 | if (get_verbosely) | |
404 | fprintf(stderr, | |
405 | "Resuming fetch of index for pack %s at byte %ld\n", | |
1d389ab6 | 406 | hex, prev_posn); |
49a0f240 NH |
407 | sprintf(range, "Range: bytes=%ld-", prev_posn); |
408 | range_header = curl_slist_append(range_header, range); | |
1d389ab6 | 409 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); |
49a0f240 NH |
410 | } |
411 | ||
1d389ab6 NH |
412 | if (start_active_slot(slot)) { |
413 | run_active_slot(slot); | |
414 | if (slot->curl_result != CURLE_OK) { | |
415 | fclose(indexfile); | |
416 | return error("Unable to get pack index %s\n%s", url, | |
417 | curl_errorstr); | |
418 | } | |
419 | } else { | |
313c4714 | 420 | fclose(indexfile); |
1d389ab6 | 421 | return error("Unable to start request"); |
182005b9 DB |
422 | } |
423 | ||
424 | fclose(indexfile); | |
49a0f240 | 425 | |
b721e01f | 426 | return move_temp_to_file(tmpfile, filename); |
182005b9 DB |
427 | } |
428 | ||
b3661567 | 429 | static int setup_index(struct alt_base *repo, unsigned char *sha1) |
182005b9 DB |
430 | { |
431 | struct packed_git *new_pack; | |
432 | if (has_pack_file(sha1)) | |
433 | return 0; // don't list this as something we can get | |
434 | ||
b3661567 | 435 | if (fetch_index(repo, sha1)) |
182005b9 DB |
436 | return -1; |
437 | ||
438 | new_pack = parse_pack_index(sha1); | |
b3661567 DB |
439 | new_pack->next = repo->packs; |
440 | repo->packs = new_pack; | |
182005b9 DB |
441 | return 0; |
442 | } | |
443 | ||
acc075a8 | 444 | static void process_alternates(void *callback_data) |
b3661567 | 445 | { |
acc075a8 NH |
446 | struct alt_request *alt_req = (struct alt_request *)callback_data; |
447 | struct active_request_slot *slot = alt_req->slot; | |
1d389ab6 | 448 | struct alt_base *tail = alt; |
acc075a8 | 449 | char *base = alt_req->base; |
bc8f2652 | 450 | static const char null_byte = '\0'; |
acc075a8 NH |
451 | char *data; |
452 | int i = 0; | |
1d389ab6 | 453 | |
acc075a8 NH |
454 | if (alt_req->http_specific) { |
455 | if (slot->curl_result != CURLE_OK || | |
456 | !alt_req->buffer->posn) { | |
457 | ||
458 | /* Try reusing the slot to get non-http alternates */ | |
459 | alt_req->http_specific = 0; | |
460 | sprintf(alt_req->url, "%s/objects/info/alternates", | |
461 | base); | |
462 | curl_easy_setopt(slot->curl, CURLOPT_URL, | |
463 | alt_req->url); | |
464 | active_requests++; | |
465 | slot->in_use = 1; | |
1d389ab6 | 466 | if (start_active_slot(slot)) { |
acc075a8 NH |
467 | return; |
468 | } else { | |
469 | got_alternates = -1; | |
29508e1e | 470 | slot->in_use = 0; |
acc075a8 | 471 | return; |
1d389ab6 | 472 | } |
b3661567 | 473 | } |
acc075a8 NH |
474 | } else if (slot->curl_result != CURLE_OK) { |
475 | if (slot->http_code != 404) { | |
476 | got_alternates = -1; | |
477 | return; | |
478 | } | |
b3661567 DB |
479 | } |
480 | ||
29508e1e | 481 | fwrite_buffer(&null_byte, 1, 1, alt_req->buffer); |
acc075a8 NH |
482 | alt_req->buffer->posn--; |
483 | data = alt_req->buffer->buffer; | |
1b0c1e67 | 484 | |
acc075a8 | 485 | while (i < alt_req->buffer->posn) { |
b3661567 | 486 | int posn = i; |
acc075a8 | 487 | while (posn < alt_req->buffer->posn && data[posn] != '\n') |
b3661567 DB |
488 | posn++; |
489 | if (data[posn] == '\n') { | |
1b0c1e67 DB |
490 | int okay = 0; |
491 | int serverlen = 0; | |
492 | struct alt_base *newalt; | |
493 | char *target = NULL; | |
b3661567 | 494 | if (data[i] == '/') { |
1b0c1e67 DB |
495 | serverlen = strchr(base + 8, '/') - base; |
496 | okay = 1; | |
497 | } else if (!memcmp(data + i, "../", 3)) { | |
498 | i += 3; | |
499 | serverlen = strlen(base); | |
500 | while (i + 2 < posn && | |
501 | !memcmp(data + i, "../", 3)) { | |
502 | do { | |
503 | serverlen--; | |
504 | } while (serverlen && | |
505 | base[serverlen - 1] != '/'); | |
506 | i += 3; | |
507 | } | |
508 | // If the server got removed, give up. | |
509 | okay = strchr(base, ':') - base + 3 < | |
510 | serverlen; | |
acc075a8 | 511 | } else if (alt_req->http_specific) { |
1b0c1e67 DB |
512 | char *colon = strchr(data + i, ':'); |
513 | char *slash = strchr(data + i, '/'); | |
514 | if (colon && slash && colon < data + posn && | |
515 | slash < data + posn && colon < slash) { | |
516 | okay = 1; | |
517 | } | |
518 | } | |
519 | // skip 'objects' at end | |
520 | if (okay) { | |
521 | target = xmalloc(serverlen + posn - i - 6); | |
b3661567 DB |
522 | strncpy(target, base, serverlen); |
523 | strncpy(target + serverlen, data + i, | |
524 | posn - i - 7); | |
525 | target[serverlen + posn - i - 7] = '\0'; | |
526 | if (get_verbosely) | |
527 | fprintf(stderr, | |
528 | "Also look at %s\n", target); | |
529 | newalt = xmalloc(sizeof(*newalt)); | |
1d389ab6 | 530 | newalt->next = NULL; |
b3661567 DB |
531 | newalt->base = target; |
532 | newalt->got_indices = 0; | |
533 | newalt->packs = NULL; | |
1d389ab6 NH |
534 | while (tail->next != NULL) |
535 | tail = tail->next; | |
536 | tail->next = newalt; | |
b3661567 DB |
537 | } |
538 | } | |
539 | i = posn + 1; | |
540 | } | |
bc8f2652 | 541 | |
f7eb290f | 542 | got_alternates = 1; |
acc075a8 NH |
543 | } |
544 | ||
545 | static void fetch_alternates(char *base) | |
546 | { | |
547 | struct buffer buffer; | |
548 | char *url; | |
549 | char *data; | |
550 | struct active_request_slot *slot; | |
551 | static struct alt_request alt_req; | |
acc075a8 NH |
552 | |
553 | /* If another request has already started fetching alternates, | |
554 | wait for them to arrive and return to processing this request's | |
555 | curl message */ | |
29508e1e | 556 | #ifdef USE_CURL_MULTI |
acc075a8 | 557 | while (got_alternates == 0) { |
29508e1e | 558 | step_active_slots(); |
acc075a8 | 559 | } |
29508e1e | 560 | #endif |
acc075a8 NH |
561 | |
562 | /* Nothing to do if they've already been fetched */ | |
563 | if (got_alternates == 1) | |
564 | return; | |
565 | ||
566 | /* Start the fetch */ | |
567 | got_alternates = 0; | |
568 | ||
569 | data = xmalloc(4096); | |
570 | buffer.size = 4096; | |
571 | buffer.posn = 0; | |
572 | buffer.buffer = data; | |
573 | ||
574 | if (get_verbosely) | |
575 | fprintf(stderr, "Getting alternates list for %s\n", base); | |
576 | ||
577 | url = xmalloc(strlen(base) + 31); | |
578 | sprintf(url, "%s/objects/info/http-alternates", base); | |
579 | ||
580 | /* Use a callback to process the result, since another request | |
581 | may fail and need to have alternates loaded before continuing */ | |
582 | slot = get_active_slot(); | |
583 | slot->callback_func = process_alternates; | |
584 | slot->callback_data = &alt_req; | |
585 | ||
586 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
29508e1e | 587 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); |
acc075a8 NH |
588 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); |
589 | ||
590 | alt_req.base = base; | |
591 | alt_req.url = url; | |
592 | alt_req.buffer = &buffer; | |
593 | alt_req.http_specific = 1; | |
594 | alt_req.slot = slot; | |
595 | ||
596 | if (start_active_slot(slot)) | |
597 | run_active_slot(slot); | |
598 | else | |
599 | got_alternates = -1; | |
600 | ||
601 | free(data); | |
602 | free(url); | |
b3661567 DB |
603 | } |
604 | ||
605 | static int fetch_indices(struct alt_base *repo) | |
182005b9 DB |
606 | { |
607 | unsigned char sha1[20]; | |
608 | char *url; | |
609 | struct buffer buffer; | |
610 | char *data; | |
611 | int i = 0; | |
612 | ||
1d389ab6 NH |
613 | struct active_request_slot *slot; |
614 | ||
b3661567 | 615 | if (repo->got_indices) |
182005b9 DB |
616 | return 0; |
617 | ||
618 | data = xmalloc(4096); | |
619 | buffer.size = 4096; | |
620 | buffer.posn = 0; | |
621 | buffer.buffer = data; | |
622 | ||
623 | if (get_verbosely) | |
6fd72e39 | 624 | fprintf(stderr, "Getting pack list for %s\n", repo->base); |
182005b9 | 625 | |
b3661567 DB |
626 | url = xmalloc(strlen(repo->base) + 21); |
627 | sprintf(url, "%s/objects/info/packs", repo->base); | |
182005b9 | 628 | |
1d389ab6 NH |
629 | slot = get_active_slot(); |
630 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
29508e1e | 631 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); |
1d389ab6 NH |
632 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); |
633 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); | |
634 | if (start_active_slot(slot)) { | |
635 | run_active_slot(slot); | |
bc8f2652 SV |
636 | if (slot->curl_result != CURLE_OK) { |
637 | free(buffer.buffer); | |
1d389ab6 | 638 | return error("%s", curl_errorstr); |
bc8f2652 | 639 | } |
1d389ab6 | 640 | } else { |
bc8f2652 | 641 | free(buffer.buffer); |
1d389ab6 NH |
642 | return error("Unable to start request"); |
643 | } | |
182005b9 | 644 | |
bc8f2652 | 645 | data = buffer.buffer; |
b3661567 | 646 | while (i < buffer.posn) { |
182005b9 DB |
647 | switch (data[i]) { |
648 | case 'P': | |
649 | i++; | |
650 | if (i + 52 < buffer.posn && | |
651 | !strncmp(data + i, " pack-", 6) && | |
652 | !strncmp(data + i + 46, ".pack\n", 6)) { | |
653 | get_sha1_hex(data + i + 6, sha1); | |
b3661567 | 654 | setup_index(repo, sha1); |
182005b9 DB |
655 | i += 51; |
656 | break; | |
657 | } | |
658 | default: | |
659 | while (data[i] != '\n') | |
660 | i++; | |
661 | } | |
662 | i++; | |
b3661567 | 663 | } |
182005b9 | 664 | |
bc8f2652 | 665 | free(buffer.buffer); |
b3661567 | 666 | repo->got_indices = 1; |
182005b9 DB |
667 | return 0; |
668 | } | |
669 | ||
b3661567 | 670 | static int fetch_pack(struct alt_base *repo, unsigned char *sha1) |
182005b9 DB |
671 | { |
672 | char *url; | |
673 | struct packed_git *target; | |
674 | struct packed_git **lst; | |
675 | FILE *packfile; | |
676 | char *filename; | |
49a0f240 NH |
677 | char tmpfile[PATH_MAX]; |
678 | int ret; | |
679 | long prev_posn = 0; | |
680 | char range[RANGE_HEADER_SIZE]; | |
681 | struct curl_slist *range_header = NULL; | |
1d389ab6 NH |
682 | |
683 | struct active_request_slot *slot; | |
182005b9 | 684 | |
b3661567 | 685 | if (fetch_indices(repo)) |
182005b9 | 686 | return -1; |
b3661567 | 687 | target = find_sha1_pack(sha1, repo->packs); |
182005b9 | 688 | if (!target) |
b3661567 | 689 | return -1; |
182005b9 DB |
690 | |
691 | if (get_verbosely) { | |
692 | fprintf(stderr, "Getting pack %s\n", | |
693 | sha1_to_hex(target->sha1)); | |
694 | fprintf(stderr, " which contains %s\n", | |
695 | sha1_to_hex(sha1)); | |
696 | } | |
697 | ||
b3661567 | 698 | url = xmalloc(strlen(repo->base) + 65); |
182005b9 | 699 | sprintf(url, "%s/objects/pack/pack-%s.pack", |
b3661567 | 700 | repo->base, sha1_to_hex(target->sha1)); |
182005b9 DB |
701 | |
702 | filename = sha1_pack_name(target->sha1); | |
49a0f240 NH |
703 | snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename); |
704 | packfile = fopen(tmpfile, "a"); | |
182005b9 DB |
705 | if (!packfile) |
706 | return error("Unable to open local file %s for pack", | |
707 | filename); | |
708 | ||
1d389ab6 NH |
709 | slot = get_active_slot(); |
710 | curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile); | |
711 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
712 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
03126006 | 713 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); |
1d389ab6 | 714 | slot->local = packfile; |
1ddea77e | 715 | |
49a0f240 NH |
716 | /* If there is data present from a previous transfer attempt, |
717 | resume where it left off */ | |
718 | prev_posn = ftell(packfile); | |
719 | if (prev_posn>0) { | |
720 | if (get_verbosely) | |
721 | fprintf(stderr, | |
722 | "Resuming fetch of pack %s at byte %ld\n", | |
723 | sha1_to_hex(target->sha1), prev_posn); | |
724 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
725 | range_header = curl_slist_append(range_header, range); | |
1d389ab6 | 726 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); |
49a0f240 NH |
727 | } |
728 | ||
1d389ab6 NH |
729 | if (start_active_slot(slot)) { |
730 | run_active_slot(slot); | |
731 | if (slot->curl_result != CURLE_OK) { | |
732 | fclose(packfile); | |
733 | return error("Unable to get pack file %s\n%s", url, | |
734 | curl_errorstr); | |
735 | } | |
736 | } else { | |
313c4714 | 737 | fclose(packfile); |
1d389ab6 | 738 | return error("Unable to start request"); |
182005b9 DB |
739 | } |
740 | ||
741 | fclose(packfile); | |
742 | ||
b721e01f | 743 | ret = move_temp_to_file(tmpfile, filename); |
49a0f240 | 744 | if (ret) |
b721e01f | 745 | return ret; |
49a0f240 | 746 | |
b3661567 | 747 | lst = &repo->packs; |
182005b9 DB |
748 | while (*lst != target) |
749 | lst = &((*lst)->next); | |
750 | *lst = (*lst)->next; | |
751 | ||
271421cd JH |
752 | if (verify_pack(target, 0)) |
753 | return -1; | |
182005b9 DB |
754 | install_packed_git(target); |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
a7928f8e | 759 | static int fetch_object(struct alt_base *repo, unsigned char *sha1) |
6eb7ed54 DB |
760 | { |
761 | char *hex = sha1_to_hex(sha1); | |
29508e1e | 762 | int ret = 0; |
1d389ab6 | 763 | struct transfer_request *request = request_queue_head; |
1d389ab6 NH |
764 | |
765 | while (request != NULL && memcmp(request->sha1, sha1, 20)) | |
766 | request = request->next; | |
767 | if (request == NULL) | |
768 | return error("Couldn't find request for %s in the queue", hex); | |
769 | ||
11f0dafe NH |
770 | if (has_sha1_file(request->sha1)) { |
771 | release_request(request); | |
772 | return 0; | |
773 | } | |
774 | ||
a7a8d378 | 775 | #ifdef USE_CURL_MULTI |
1d389ab6 | 776 | while (request->state == WAITING) { |
29508e1e | 777 | step_active_slots(); |
1d389ab6 | 778 | } |
a7a8d378 NH |
779 | #else |
780 | start_request(request); | |
781 | #endif | |
6eb7ed54 | 782 | |
a7a8d378 | 783 | while (request->state == ACTIVE) { |
1d389ab6 | 784 | run_active_slot(request->slot); |
a7a8d378 | 785 | } |
313c4714 PB |
786 | if (request->local != -1) { |
787 | close(request->local); request->local = -1; | |
788 | } | |
6eb7ed54 | 789 | |
1d389ab6 | 790 | if (request->state == ABORTED) { |
29508e1e NH |
791 | ret = error("Request for %s aborted", hex); |
792 | } else if (request->curl_result != CURLE_OK && | |
793 | request->http_code != 416) { | |
e2029eb9 PB |
794 | if (request->http_code == 404) |
795 | ret = -1; /* Be silent, it is probably in a pack. */ | |
796 | else | |
797 | ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)", | |
798 | request->errorstr, request->curl_result, | |
799 | request->http_code, hex); | |
29508e1e | 800 | } else if (request->zret != Z_STREAM_END) { |
1d389ab6 | 801 | ret = error("File %s (%s) corrupt\n", hex, request->url); |
29508e1e NH |
802 | } else if (memcmp(request->sha1, request->real_sha1, 20)) { |
803 | ret = error("File %s has bad hash\n", hex); | |
804 | } else if (request->rename < 0) { | |
1d389ab6 NH |
805 | ret = error("unable to write sha1 filename %s: %s", |
806 | request->filename, | |
807 | strerror(request->rename)); | |
6eb7ed54 | 808 | } |
49a0f240 | 809 | |
1d389ab6 | 810 | release_request(request); |
29508e1e | 811 | return ret; |
6eb7ed54 DB |
812 | } |
813 | ||
b3661567 DB |
814 | int fetch(unsigned char *sha1) |
815 | { | |
816 | struct alt_base *altbase = alt; | |
1d389ab6 NH |
817 | |
818 | if (!fetch_object(altbase, sha1)) | |
819 | return 0; | |
b3661567 | 820 | while (altbase) { |
b3661567 DB |
821 | if (!fetch_pack(altbase, sha1)) |
822 | return 0; | |
f7eb290f | 823 | fetch_alternates(alt->base); |
b3661567 DB |
824 | altbase = altbase->next; |
825 | } | |
826 | return error("Unable to find %s under %s\n", sha1_to_hex(sha1), | |
1d389ab6 | 827 | alt->base); |
b3661567 DB |
828 | } |
829 | ||
94fa447a JH |
830 | static inline int needs_quote(int ch) |
831 | { | |
832 | switch (ch) { | |
833 | case '/': case '-': case '.': | |
834 | case 'A'...'Z': case 'a'...'z': case '0'...'9': | |
835 | return 0; | |
836 | default: | |
837 | return 1; | |
838 | } | |
839 | } | |
840 | ||
841 | static inline int hex(int v) | |
842 | { | |
843 | if (v < 10) return '0' + v; | |
844 | else return 'A' + v - 10; | |
845 | } | |
846 | ||
847 | static char *quote_ref_url(const char *base, const char *ref) | |
848 | { | |
849 | const char *cp; | |
850 | char *dp, *qref; | |
851 | int len, baselen, ch; | |
852 | ||
853 | baselen = strlen(base); | |
854 | len = baselen + 6; /* "refs/" + NUL */ | |
855 | for (cp = ref; (ch = *cp) != 0; cp++, len++) | |
856 | if (needs_quote(ch)) | |
857 | len += 2; /* extra two hex plus replacement % */ | |
858 | qref = xmalloc(len); | |
859 | memcpy(qref, base, baselen); | |
860 | memcpy(qref + baselen, "refs/", 5); | |
861 | for (cp = ref, dp = qref + baselen + 5; (ch = *cp) != 0; cp++) { | |
862 | if (needs_quote(ch)) { | |
863 | *dp++ = '%'; | |
864 | *dp++ = hex((ch >> 4) & 0xF); | |
865 | *dp++ = hex(ch & 0xF); | |
866 | } | |
867 | else | |
868 | *dp++ = ch; | |
869 | } | |
870 | *dp = 0; | |
871 | ||
872 | return qref; | |
873 | } | |
874 | ||
cd541a68 DB |
875 | int fetch_ref(char *ref, unsigned char *sha1) |
876 | { | |
94fa447a | 877 | char *url; |
fa3e0655 DB |
878 | char hex[42]; |
879 | struct buffer buffer; | |
1d389ab6 NH |
880 | char *base = alt->base; |
881 | struct active_request_slot *slot; | |
fa3e0655 DB |
882 | buffer.size = 41; |
883 | buffer.posn = 0; | |
884 | buffer.buffer = hex; | |
885 | hex[41] = '\0'; | |
886 | ||
94fa447a | 887 | url = quote_ref_url(base, ref); |
1d389ab6 NH |
888 | slot = get_active_slot(); |
889 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
890 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); | |
891 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); | |
892 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
893 | if (start_active_slot(slot)) { | |
894 | run_active_slot(slot); | |
895 | if (slot->curl_result != CURLE_OK) | |
896 | return error("Couldn't get %s for %s\n%s", | |
897 | url, ref, curl_errorstr); | |
898 | } else { | |
899 | return error("Unable to start request"); | |
900 | } | |
fa3e0655 DB |
901 | |
902 | hex[40] = '\0'; | |
903 | get_sha1_hex(hex, sha1); | |
904 | return 0; | |
cd541a68 DB |
905 | } |
906 | ||
6eb7ed54 DB |
907 | int main(int argc, char **argv) |
908 | { | |
909 | char *commit_id; | |
910 | char *url; | |
911 | int arg = 1; | |
7b9ae53e | 912 | int rc = 0; |
6eb7ed54 DB |
913 | |
914 | while (arg < argc && argv[arg][0] == '-') { | |
915 | if (argv[arg][1] == 't') { | |
4250a5e5 | 916 | get_tree = 1; |
6eb7ed54 | 917 | } else if (argv[arg][1] == 'c') { |
4250a5e5 | 918 | get_history = 1; |
6eb7ed54 | 919 | } else if (argv[arg][1] == 'a') { |
4250a5e5 DB |
920 | get_all = 1; |
921 | get_tree = 1; | |
922 | get_history = 1; | |
e78d9772 JH |
923 | } else if (argv[arg][1] == 'v') { |
924 | get_verbosely = 1; | |
fa3e0655 DB |
925 | } else if (argv[arg][1] == 'w') { |
926 | write_ref = argv[arg + 1]; | |
927 | arg++; | |
820eca68 DB |
928 | } else if (!strcmp(argv[arg], "--recover")) { |
929 | get_recover = 1; | |
6eb7ed54 DB |
930 | } |
931 | arg++; | |
932 | } | |
933 | if (argc < arg + 2) { | |
215a7ad1 | 934 | usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url"); |
6eb7ed54 DB |
935 | return 1; |
936 | } | |
937 | commit_id = argv[arg]; | |
938 | url = argv[arg + 1]; | |
939 | ||
29508e1e | 940 | http_init(); |
d402d556 | 941 | |
1db69b57 | 942 | no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:"); |
3dcb90f5 | 943 | |
b3661567 DB |
944 | alt = xmalloc(sizeof(*alt)); |
945 | alt->base = url; | |
946 | alt->got_indices = 0; | |
947 | alt->packs = NULL; | |
948 | alt->next = NULL; | |
6eb7ed54 | 949 | |
4250a5e5 | 950 | if (pull(commit_id)) |
7b9ae53e | 951 | rc = 1; |
6eb7ed54 | 952 | |
1db69b57 | 953 | curl_slist_free_all(no_pragma_header); |
29508e1e NH |
954 | |
955 | http_cleanup(); | |
956 | ||
7b9ae53e | 957 | return rc; |
6eb7ed54 | 958 | } |