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Commit | Line | Data |
---|---|---|
6eb7ed54 DB |
1 | #include "cache.h" |
2 | #include "commit.h" | |
271421cd | 3 | #include "pack.h" |
30ae764b | 4 | #include "walker.h" |
29508e1e | 5 | #include "http.h" |
7baa3e86 | 6 | |
49a0f240 NH |
7 | #define PREV_BUF_SIZE 4096 |
8 | #define RANGE_HEADER_SIZE 30 | |
9 | ||
b3661567 DB |
10 | struct alt_base |
11 | { | |
2afea3bc | 12 | char *base; |
b3661567 DB |
13 | int got_indices; |
14 | struct packed_git *packs; | |
15 | struct alt_base *next; | |
16 | }; | |
17 | ||
e388ab74 | 18 | enum object_request_state { |
1d389ab6 NH |
19 | WAITING, |
20 | ABORTED, | |
21 | ACTIVE, | |
22 | COMPLETE, | |
23 | }; | |
6eb7ed54 | 24 | |
e388ab74 | 25 | struct object_request |
1d389ab6 | 26 | { |
30ae764b | 27 | struct walker *walker; |
1d389ab6 NH |
28 | unsigned char sha1[20]; |
29 | struct alt_base *repo; | |
30 | char *url; | |
31 | char filename[PATH_MAX]; | |
32 | char tmpfile[PATH_MAX]; | |
33 | int local; | |
e388ab74 | 34 | enum object_request_state state; |
1d389ab6 NH |
35 | CURLcode curl_result; |
36 | char errorstr[CURL_ERROR_SIZE]; | |
37 | long http_code; | |
38 | unsigned char real_sha1[20]; | |
39 | SHA_CTX c; | |
40 | z_stream stream; | |
41 | int zret; | |
42 | int rename; | |
43 | struct active_request_slot *slot; | |
e388ab74 | 44 | struct object_request *next; |
1d389ab6 NH |
45 | }; |
46 | ||
e388ab74 | 47 | struct alternates_request { |
30ae764b | 48 | struct walker *walker; |
8e29f6a0 | 49 | const char *base; |
acc075a8 | 50 | char *url; |
028c2976 | 51 | struct strbuf *buffer; |
acc075a8 NH |
52 | struct active_request_slot *slot; |
53 | int http_specific; | |
54 | }; | |
55 | ||
30ae764b DB |
56 | struct walker_data { |
57 | const char *url; | |
58 | int got_alternates; | |
59 | struct alt_base *alt; | |
60 | struct curl_slist *no_pragma_header; | |
61 | }; | |
62 | ||
96f1e58f | 63 | static struct object_request *object_queue_head; |
bc8f2652 | 64 | |
182005b9 DB |
65 | static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, |
66 | void *data) | |
67 | { | |
bf0f910d | 68 | unsigned char expn[4096]; |
6eb7ed54 DB |
69 | size_t size = eltsize * nmemb; |
70 | int posn = 0; | |
e388ab74 | 71 | struct object_request *obj_req = (struct object_request *)data; |
6eb7ed54 | 72 | do { |
93822c22 | 73 | ssize_t retval = xwrite(obj_req->local, |
1d7f171c | 74 | (char *) ptr + posn, size - posn); |
6eb7ed54 DB |
75 | if (retval < 0) |
76 | return posn; | |
77 | posn += retval; | |
78 | } while (posn < size); | |
79 | ||
e388ab74 NH |
80 | obj_req->stream.avail_in = size; |
81 | obj_req->stream.next_in = ptr; | |
6eb7ed54 | 82 | do { |
e388ab74 NH |
83 | obj_req->stream.next_out = expn; |
84 | obj_req->stream.avail_out = sizeof(expn); | |
85 | obj_req->zret = inflate(&obj_req->stream, Z_SYNC_FLUSH); | |
86 | SHA1_Update(&obj_req->c, expn, | |
87 | sizeof(expn) - obj_req->stream.avail_out); | |
88 | } while (obj_req->stream.avail_in && obj_req->zret == Z_OK); | |
1d389ab6 | 89 | data_received++; |
6eb7ed54 DB |
90 | return size; |
91 | } | |
92 | ||
30ae764b | 93 | static void fetch_alternates(struct walker *walker, const char *base); |
1d389ab6 | 94 | |
29508e1e | 95 | static void process_object_response(void *callback_data); |
1d389ab6 | 96 | |
30ae764b DB |
97 | static void start_object_request(struct walker *walker, |
98 | struct object_request *obj_req) | |
1d389ab6 | 99 | { |
e388ab74 | 100 | char *hex = sha1_to_hex(obj_req->sha1); |
1d389ab6 NH |
101 | char prevfile[PATH_MAX]; |
102 | char *url; | |
103 | char *posn; | |
104 | int prevlocal; | |
105 | unsigned char prev_buf[PREV_BUF_SIZE]; | |
106 | ssize_t prev_read = 0; | |
107 | long prev_posn = 0; | |
108 | char range[RANGE_HEADER_SIZE]; | |
109 | struct curl_slist *range_header = NULL; | |
110 | struct active_request_slot *slot; | |
30ae764b | 111 | struct walker_data *data = walker->data; |
1d389ab6 | 112 | |
e388ab74 | 113 | snprintf(prevfile, sizeof(prevfile), "%s.prev", obj_req->filename); |
1d389ab6 | 114 | unlink(prevfile); |
e388ab74 NH |
115 | rename(obj_req->tmpfile, prevfile); |
116 | unlink(obj_req->tmpfile); | |
1d389ab6 | 117 | |
e388ab74 NH |
118 | if (obj_req->local != -1) |
119 | error("fd leakage in start: %d", obj_req->local); | |
120 | obj_req->local = open(obj_req->tmpfile, | |
1d389ab6 | 121 | O_WRONLY | O_CREAT | O_EXCL, 0666); |
b721e01f JH |
122 | /* This could have failed due to the "lazy directory creation"; |
123 | * try to mkdir the last path component. | |
124 | */ | |
e388ab74 NH |
125 | if (obj_req->local < 0 && errno == ENOENT) { |
126 | char *dir = strrchr(obj_req->tmpfile, '/'); | |
b721e01f JH |
127 | if (dir) { |
128 | *dir = 0; | |
e388ab74 | 129 | mkdir(obj_req->tmpfile, 0777); |
b721e01f JH |
130 | *dir = '/'; |
131 | } | |
e388ab74 | 132 | obj_req->local = open(obj_req->tmpfile, |
b721e01f JH |
133 | O_WRONLY | O_CREAT | O_EXCL, 0666); |
134 | } | |
135 | ||
e388ab74 NH |
136 | if (obj_req->local < 0) { |
137 | obj_req->state = ABORTED; | |
bd2afde8 | 138 | error("Couldn't create temporary file %s for %s: %s", |
e388ab74 | 139 | obj_req->tmpfile, obj_req->filename, strerror(errno)); |
1d389ab6 NH |
140 | return; |
141 | } | |
142 | ||
e388ab74 | 143 | memset(&obj_req->stream, 0, sizeof(obj_req->stream)); |
1d389ab6 | 144 | |
e388ab74 | 145 | inflateInit(&obj_req->stream); |
1d389ab6 | 146 | |
e388ab74 | 147 | SHA1_Init(&obj_req->c); |
1d389ab6 | 148 | |
2afea3bc GP |
149 | url = xmalloc(strlen(obj_req->repo->base) + 51); |
150 | obj_req->url = xmalloc(strlen(obj_req->repo->base) + 51); | |
e388ab74 NH |
151 | strcpy(url, obj_req->repo->base); |
152 | posn = url + strlen(obj_req->repo->base); | |
2afea3bc GP |
153 | strcpy(posn, "/objects/"); |
154 | posn += 9; | |
1d389ab6 NH |
155 | memcpy(posn, hex, 2); |
156 | posn += 2; | |
157 | *(posn++) = '/'; | |
158 | strcpy(posn, hex + 2); | |
e388ab74 | 159 | strcpy(obj_req->url, url); |
1d389ab6 NH |
160 | |
161 | /* If a previous temp file is present, process what was already | |
162 | fetched. */ | |
163 | prevlocal = open(prevfile, O_RDONLY); | |
164 | if (prevlocal != -1) { | |
165 | do { | |
93d26e4c | 166 | prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); |
1d389ab6 NH |
167 | if (prev_read>0) { |
168 | if (fwrite_sha1_file(prev_buf, | |
169 | 1, | |
170 | prev_read, | |
e388ab74 | 171 | obj_req) == prev_read) { |
1d389ab6 NH |
172 | prev_posn += prev_read; |
173 | } else { | |
174 | prev_read = -1; | |
175 | } | |
176 | } | |
177 | } while (prev_read > 0); | |
178 | close(prevlocal); | |
179 | } | |
180 | unlink(prevfile); | |
181 | ||
182 | /* Reset inflate/SHA1 if there was an error reading the previous temp | |
183 | file; also rewind to the beginning of the local file. */ | |
184 | if (prev_read == -1) { | |
e388ab74 NH |
185 | memset(&obj_req->stream, 0, sizeof(obj_req->stream)); |
186 | inflateInit(&obj_req->stream); | |
187 | SHA1_Init(&obj_req->c); | |
1d389ab6 NH |
188 | if (prev_posn>0) { |
189 | prev_posn = 0; | |
b5da2467 | 190 | lseek(obj_req->local, 0, SEEK_SET); |
e388ab74 | 191 | ftruncate(obj_req->local, 0); |
1d389ab6 NH |
192 | } |
193 | } | |
194 | ||
195 | slot = get_active_slot(); | |
29508e1e | 196 | slot->callback_func = process_object_response; |
e388ab74 NH |
197 | slot->callback_data = obj_req; |
198 | obj_req->slot = slot; | |
29508e1e | 199 | |
e388ab74 | 200 | curl_easy_setopt(slot->curl, CURLOPT_FILE, obj_req); |
1d389ab6 | 201 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); |
e388ab74 | 202 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, obj_req->errorstr); |
1d389ab6 | 203 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); |
30ae764b | 204 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, data->no_pragma_header); |
1d389ab6 NH |
205 | |
206 | /* If we have successfully processed data from a previous fetch | |
207 | attempt, only fetch the data we don't already have. */ | |
208 | if (prev_posn>0) { | |
30ae764b | 209 | if (walker->get_verbosely) |
1d389ab6 NH |
210 | fprintf(stderr, |
211 | "Resuming fetch of object %s at byte %ld\n", | |
212 | hex, prev_posn); | |
213 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
214 | range_header = curl_slist_append(range_header, range); | |
215 | curl_easy_setopt(slot->curl, | |
216 | CURLOPT_HTTPHEADER, range_header); | |
217 | } | |
218 | ||
a7a8d378 | 219 | /* Try to get the request started, abort the request on error */ |
e388ab74 | 220 | obj_req->state = ACTIVE; |
1d389ab6 | 221 | if (!start_active_slot(slot)) { |
e388ab74 NH |
222 | obj_req->state = ABORTED; |
223 | obj_req->slot = NULL; | |
224 | close(obj_req->local); obj_req->local = -1; | |
225 | free(obj_req->url); | |
226 | return; | |
1d389ab6 | 227 | } |
1d389ab6 NH |
228 | } |
229 | ||
e388ab74 | 230 | static void finish_object_request(struct object_request *obj_req) |
1d389ab6 | 231 | { |
50496b21 NH |
232 | struct stat st; |
233 | ||
e388ab74 NH |
234 | fchmod(obj_req->local, 0444); |
235 | close(obj_req->local); obj_req->local = -1; | |
1d389ab6 | 236 | |
e388ab74 | 237 | if (obj_req->http_code == 416) { |
1d389ab6 | 238 | fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); |
e388ab74 NH |
239 | } else if (obj_req->curl_result != CURLE_OK) { |
240 | if (stat(obj_req->tmpfile, &st) == 0) | |
50496b21 | 241 | if (st.st_size == 0) |
e388ab74 | 242 | unlink(obj_req->tmpfile); |
1d389ab6 NH |
243 | return; |
244 | } | |
245 | ||
e388ab74 NH |
246 | inflateEnd(&obj_req->stream); |
247 | SHA1_Final(obj_req->real_sha1, &obj_req->c); | |
248 | if (obj_req->zret != Z_STREAM_END) { | |
249 | unlink(obj_req->tmpfile); | |
1d389ab6 NH |
250 | return; |
251 | } | |
a89fccd2 | 252 | if (hashcmp(obj_req->sha1, obj_req->real_sha1)) { |
e388ab74 | 253 | unlink(obj_req->tmpfile); |
1d389ab6 NH |
254 | return; |
255 | } | |
e388ab74 NH |
256 | obj_req->rename = |
257 | move_temp_to_file(obj_req->tmpfile, obj_req->filename); | |
1d389ab6 | 258 | |
e388ab74 | 259 | if (obj_req->rename == 0) |
30ae764b | 260 | walker_say(obj_req->walker, "got %s\n", sha1_to_hex(obj_req->sha1)); |
1d389ab6 NH |
261 | } |
262 | ||
29508e1e NH |
263 | static void process_object_response(void *callback_data) |
264 | { | |
e388ab74 NH |
265 | struct object_request *obj_req = |
266 | (struct object_request *)callback_data; | |
30ae764b DB |
267 | struct walker *walker = obj_req->walker; |
268 | struct walker_data *data = walker->data; | |
269 | struct alt_base *alt = data->alt; | |
29508e1e | 270 | |
e388ab74 NH |
271 | obj_req->curl_result = obj_req->slot->curl_result; |
272 | obj_req->http_code = obj_req->slot->http_code; | |
273 | obj_req->slot = NULL; | |
274 | obj_req->state = COMPLETE; | |
29508e1e NH |
275 | |
276 | /* Use alternates if necessary */ | |
be4a015b | 277 | if (missing_target(obj_req)) { |
30ae764b | 278 | fetch_alternates(walker, alt->base); |
e388ab74 NH |
279 | if (obj_req->repo->next != NULL) { |
280 | obj_req->repo = | |
281 | obj_req->repo->next; | |
282 | close(obj_req->local); | |
283 | obj_req->local = -1; | |
30ae764b | 284 | start_object_request(walker, obj_req); |
29508e1e NH |
285 | return; |
286 | } | |
287 | } | |
288 | ||
e388ab74 | 289 | finish_object_request(obj_req); |
29508e1e NH |
290 | } |
291 | ||
e388ab74 | 292 | static void release_object_request(struct object_request *obj_req) |
1d389ab6 | 293 | { |
e388ab74 | 294 | struct object_request *entry = object_queue_head; |
1d389ab6 | 295 | |
e388ab74 NH |
296 | if (obj_req->local != -1) |
297 | error("fd leakage in release: %d", obj_req->local); | |
298 | if (obj_req == object_queue_head) { | |
299 | object_queue_head = obj_req->next; | |
1d389ab6 | 300 | } else { |
e388ab74 | 301 | while (entry->next != NULL && entry->next != obj_req) |
1d389ab6 | 302 | entry = entry->next; |
e388ab74 | 303 | if (entry->next == obj_req) |
1d389ab6 NH |
304 | entry->next = entry->next->next; |
305 | } | |
306 | ||
e388ab74 NH |
307 | free(obj_req->url); |
308 | free(obj_req); | |
1d389ab6 NH |
309 | } |
310 | ||
a7a8d378 | 311 | #ifdef USE_CURL_MULTI |
30ae764b | 312 | static int fill_active_slot(struct walker *walker) |
1d389ab6 | 313 | { |
45c17412 | 314 | struct object_request *obj_req; |
1d389ab6 | 315 | |
45c17412 | 316 | for (obj_req = object_queue_head; obj_req; obj_req = obj_req->next) { |
e388ab74 NH |
317 | if (obj_req->state == WAITING) { |
318 | if (has_sha1_file(obj_req->sha1)) | |
09db444f | 319 | obj_req->state = COMPLETE; |
45c17412 | 320 | else { |
30ae764b | 321 | start_object_request(walker, obj_req); |
45c17412 DB |
322 | return 1; |
323 | } | |
f1a906a3 | 324 | } |
8fcf7f9a | 325 | } |
45c17412 | 326 | return 0; |
1d389ab6 | 327 | } |
a7a8d378 | 328 | #endif |
1d389ab6 | 329 | |
30ae764b | 330 | static void prefetch(struct walker *walker, unsigned char *sha1) |
1d389ab6 | 331 | { |
e388ab74 NH |
332 | struct object_request *newreq; |
333 | struct object_request *tail; | |
30ae764b | 334 | struct walker_data *data = walker->data; |
1d389ab6 NH |
335 | char *filename = sha1_file_name(sha1); |
336 | ||
337 | newreq = xmalloc(sizeof(*newreq)); | |
30ae764b | 338 | newreq->walker = walker; |
e702496e | 339 | hashcpy(newreq->sha1, sha1); |
30ae764b | 340 | newreq->repo = data->alt; |
1d389ab6 NH |
341 | newreq->url = NULL; |
342 | newreq->local = -1; | |
343 | newreq->state = WAITING; | |
344 | snprintf(newreq->filename, sizeof(newreq->filename), "%s", filename); | |
345 | snprintf(newreq->tmpfile, sizeof(newreq->tmpfile), | |
346 | "%s.temp", filename); | |
e8dff6ba | 347 | newreq->slot = NULL; |
1d389ab6 NH |
348 | newreq->next = NULL; |
349 | ||
e388ab74 NH |
350 | if (object_queue_head == NULL) { |
351 | object_queue_head = newreq; | |
1d389ab6 | 352 | } else { |
e388ab74 | 353 | tail = object_queue_head; |
1d389ab6 NH |
354 | while (tail->next != NULL) { |
355 | tail = tail->next; | |
356 | } | |
357 | tail->next = newreq; | |
358 | } | |
29508e1e | 359 | |
a7a8d378 | 360 | #ifdef USE_CURL_MULTI |
29508e1e NH |
361 | fill_active_slots(); |
362 | step_active_slots(); | |
a7a8d378 | 363 | #endif |
1d389ab6 NH |
364 | } |
365 | ||
30ae764b | 366 | static int fetch_index(struct walker *walker, struct alt_base *repo, unsigned char *sha1) |
182005b9 | 367 | { |
1d389ab6 | 368 | char *hex = sha1_to_hex(sha1); |
182005b9 DB |
369 | char *filename; |
370 | char *url; | |
49a0f240 | 371 | char tmpfile[PATH_MAX]; |
49a0f240 NH |
372 | long prev_posn = 0; |
373 | char range[RANGE_HEADER_SIZE]; | |
374 | struct curl_slist *range_header = NULL; | |
30ae764b | 375 | struct walker_data *data = walker->data; |
182005b9 DB |
376 | |
377 | FILE *indexfile; | |
1d389ab6 | 378 | struct active_request_slot *slot; |
cb754fdf | 379 | struct slot_results results; |
182005b9 DB |
380 | |
381 | if (has_pack_index(sha1)) | |
382 | return 0; | |
383 | ||
30ae764b | 384 | if (walker->get_verbosely) |
1d389ab6 | 385 | fprintf(stderr, "Getting index for pack %s\n", hex); |
8fcf7f9a | 386 | |
b3661567 | 387 | url = xmalloc(strlen(repo->base) + 64); |
1d389ab6 | 388 | sprintf(url, "%s/objects/pack/pack-%s.idx", repo->base, hex); |
8fcf7f9a | 389 | |
182005b9 | 390 | filename = sha1_pack_index_name(sha1); |
49a0f240 NH |
391 | snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename); |
392 | indexfile = fopen(tmpfile, "a"); | |
182005b9 DB |
393 | if (!indexfile) |
394 | return error("Unable to open local file %s for pack index", | |
84ef0338 | 395 | tmpfile); |
182005b9 | 396 | |
1d389ab6 | 397 | slot = get_active_slot(); |
c8568e13 | 398 | slot->results = &results; |
1d389ab6 NH |
399 | curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile); |
400 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
401 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
30ae764b | 402 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, data->no_pragma_header); |
1d389ab6 NH |
403 | slot->local = indexfile; |
404 | ||
49a0f240 NH |
405 | /* If there is data present from a previous transfer attempt, |
406 | resume where it left off */ | |
407 | prev_posn = ftell(indexfile); | |
408 | if (prev_posn>0) { | |
30ae764b | 409 | if (walker->get_verbosely) |
49a0f240 NH |
410 | fprintf(stderr, |
411 | "Resuming fetch of index for pack %s at byte %ld\n", | |
1d389ab6 | 412 | hex, prev_posn); |
49a0f240 NH |
413 | sprintf(range, "Range: bytes=%ld-", prev_posn); |
414 | range_header = curl_slist_append(range_header, range); | |
1d389ab6 | 415 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); |
49a0f240 NH |
416 | } |
417 | ||
1d389ab6 NH |
418 | if (start_active_slot(slot)) { |
419 | run_active_slot(slot); | |
c8568e13 | 420 | if (results.curl_result != CURLE_OK) { |
1d389ab6 NH |
421 | fclose(indexfile); |
422 | return error("Unable to get pack index %s\n%s", url, | |
423 | curl_errorstr); | |
424 | } | |
425 | } else { | |
313c4714 | 426 | fclose(indexfile); |
1d389ab6 | 427 | return error("Unable to start request"); |
182005b9 DB |
428 | } |
429 | ||
430 | fclose(indexfile); | |
49a0f240 | 431 | |
b721e01f | 432 | return move_temp_to_file(tmpfile, filename); |
182005b9 DB |
433 | } |
434 | ||
30ae764b | 435 | static int setup_index(struct walker *walker, struct alt_base *repo, unsigned char *sha1) |
182005b9 DB |
436 | { |
437 | struct packed_git *new_pack; | |
438 | if (has_pack_file(sha1)) | |
a9486b02 | 439 | return 0; /* don't list this as something we can get */ |
182005b9 | 440 | |
30ae764b | 441 | if (fetch_index(walker, repo, sha1)) |
182005b9 DB |
442 | return -1; |
443 | ||
444 | new_pack = parse_pack_index(sha1); | |
a70c232e JH |
445 | if (!new_pack) |
446 | return -1; /* parse_pack_index() already issued error message */ | |
b3661567 DB |
447 | new_pack->next = repo->packs; |
448 | repo->packs = new_pack; | |
182005b9 DB |
449 | return 0; |
450 | } | |
451 | ||
e388ab74 | 452 | static void process_alternates_response(void *callback_data) |
b3661567 | 453 | { |
e388ab74 NH |
454 | struct alternates_request *alt_req = |
455 | (struct alternates_request *)callback_data; | |
30ae764b DB |
456 | struct walker *walker = alt_req->walker; |
457 | struct walker_data *cdata = walker->data; | |
acc075a8 | 458 | struct active_request_slot *slot = alt_req->slot; |
30ae764b | 459 | struct alt_base *tail = cdata->alt; |
8e29f6a0 | 460 | const char *base = alt_req->base; |
bc8f2652 | 461 | static const char null_byte = '\0'; |
acc075a8 NH |
462 | char *data; |
463 | int i = 0; | |
1d389ab6 | 464 | |
acc075a8 NH |
465 | if (alt_req->http_specific) { |
466 | if (slot->curl_result != CURLE_OK || | |
028c2976 | 467 | !alt_req->buffer->len) { |
acc075a8 NH |
468 | |
469 | /* Try reusing the slot to get non-http alternates */ | |
470 | alt_req->http_specific = 0; | |
471 | sprintf(alt_req->url, "%s/objects/info/alternates", | |
472 | base); | |
473 | curl_easy_setopt(slot->curl, CURLOPT_URL, | |
474 | alt_req->url); | |
475 | active_requests++; | |
476 | slot->in_use = 1; | |
c9826473 NH |
477 | if (slot->finished != NULL) |
478 | (*slot->finished) = 0; | |
a3f583cb | 479 | if (!start_active_slot(slot)) { |
30ae764b | 480 | cdata->got_alternates = -1; |
29508e1e | 481 | slot->in_use = 0; |
c9826473 NH |
482 | if (slot->finished != NULL) |
483 | (*slot->finished) = 1; | |
1d389ab6 | 484 | } |
a3f583cb | 485 | return; |
b3661567 | 486 | } |
acc075a8 | 487 | } else if (slot->curl_result != CURLE_OK) { |
be4a015b | 488 | if (!missing_target(slot)) { |
30ae764b | 489 | cdata->got_alternates = -1; |
acc075a8 NH |
490 | return; |
491 | } | |
b3661567 DB |
492 | } |
493 | ||
29508e1e | 494 | fwrite_buffer(&null_byte, 1, 1, alt_req->buffer); |
028c2976 MH |
495 | alt_req->buffer->len--; |
496 | data = alt_req->buffer->buf; | |
1b0c1e67 | 497 | |
028c2976 | 498 | while (i < alt_req->buffer->len) { |
b3661567 | 499 | int posn = i; |
028c2976 | 500 | while (posn < alt_req->buffer->len && data[posn] != '\n') |
b3661567 DB |
501 | posn++; |
502 | if (data[posn] == '\n') { | |
1b0c1e67 DB |
503 | int okay = 0; |
504 | int serverlen = 0; | |
505 | struct alt_base *newalt; | |
506 | char *target = NULL; | |
b3661567 | 507 | if (data[i] == '/') { |
5df1e0d0 JH |
508 | /* This counts |
509 | * http://git.host/pub/scm/linux.git/ | |
510 | * -----------here^ | |
511 | * so memcpy(dst, base, serverlen) will | |
512 | * copy up to "...git.host". | |
513 | */ | |
514 | const char *colon_ss = strstr(base,"://"); | |
515 | if (colon_ss) { | |
516 | serverlen = (strchr(colon_ss + 3, '/') | |
517 | - base); | |
518 | okay = 1; | |
519 | } | |
1b0c1e67 | 520 | } else if (!memcmp(data + i, "../", 3)) { |
5df1e0d0 JH |
521 | /* Relative URL; chop the corresponding |
522 | * number of subpath from base (and ../ | |
523 | * from data), and concatenate the result. | |
524 | * | |
525 | * The code first drops ../ from data, and | |
526 | * then drops one ../ from data and one path | |
527 | * from base. IOW, one extra ../ is dropped | |
528 | * from data than path is dropped from base. | |
529 | * | |
530 | * This is not wrong. The alternate in | |
531 | * http://git.host/pub/scm/linux.git/ | |
532 | * to borrow from | |
533 | * http://git.host/pub/scm/linus.git/ | |
534 | * is ../../linus.git/objects/. You need | |
535 | * two ../../ to borrow from your direct | |
536 | * neighbour. | |
537 | */ | |
1b0c1e67 DB |
538 | i += 3; |
539 | serverlen = strlen(base); | |
8fcf7f9a | 540 | while (i + 2 < posn && |
1b0c1e67 DB |
541 | !memcmp(data + i, "../", 3)) { |
542 | do { | |
543 | serverlen--; | |
544 | } while (serverlen && | |
545 | base[serverlen - 1] != '/'); | |
546 | i += 3; | |
547 | } | |
a9486b02 | 548 | /* If the server got removed, give up. */ |
8fcf7f9a | 549 | okay = strchr(base, ':') - base + 3 < |
1b0c1e67 | 550 | serverlen; |
acc075a8 | 551 | } else if (alt_req->http_specific) { |
1b0c1e67 DB |
552 | char *colon = strchr(data + i, ':'); |
553 | char *slash = strchr(data + i, '/'); | |
554 | if (colon && slash && colon < data + posn && | |
555 | slash < data + posn && colon < slash) { | |
556 | okay = 1; | |
557 | } | |
558 | } | |
5df1e0d0 | 559 | /* skip "objects\n" at end */ |
1b0c1e67 DB |
560 | if (okay) { |
561 | target = xmalloc(serverlen + posn - i - 6); | |
5df1e0d0 JH |
562 | memcpy(target, base, serverlen); |
563 | memcpy(target + serverlen, data + i, | |
564 | posn - i - 7); | |
565 | target[serverlen + posn - i - 7] = 0; | |
30ae764b | 566 | if (walker->get_verbosely) |
8fcf7f9a | 567 | fprintf(stderr, |
b3661567 DB |
568 | "Also look at %s\n", target); |
569 | newalt = xmalloc(sizeof(*newalt)); | |
1d389ab6 | 570 | newalt->next = NULL; |
b3661567 DB |
571 | newalt->base = target; |
572 | newalt->got_indices = 0; | |
573 | newalt->packs = NULL; | |
8d9fbe57 | 574 | |
1d389ab6 NH |
575 | while (tail->next != NULL) |
576 | tail = tail->next; | |
577 | tail->next = newalt; | |
b3661567 DB |
578 | } |
579 | } | |
580 | i = posn + 1; | |
581 | } | |
bc8f2652 | 582 | |
30ae764b | 583 | cdata->got_alternates = 1; |
acc075a8 NH |
584 | } |
585 | ||
30ae764b | 586 | static void fetch_alternates(struct walker *walker, const char *base) |
acc075a8 | 587 | { |
028c2976 | 588 | struct strbuf buffer = STRBUF_INIT; |
acc075a8 | 589 | char *url; |
acc075a8 | 590 | struct active_request_slot *slot; |
cb754fdf | 591 | struct alternates_request alt_req; |
30ae764b | 592 | struct walker_data *cdata = walker->data; |
acc075a8 NH |
593 | |
594 | /* If another request has already started fetching alternates, | |
595 | wait for them to arrive and return to processing this request's | |
596 | curl message */ | |
29508e1e | 597 | #ifdef USE_CURL_MULTI |
30ae764b | 598 | while (cdata->got_alternates == 0) { |
29508e1e | 599 | step_active_slots(); |
acc075a8 | 600 | } |
29508e1e | 601 | #endif |
acc075a8 NH |
602 | |
603 | /* Nothing to do if they've already been fetched */ | |
30ae764b | 604 | if (cdata->got_alternates == 1) |
acc075a8 NH |
605 | return; |
606 | ||
607 | /* Start the fetch */ | |
30ae764b | 608 | cdata->got_alternates = 0; |
acc075a8 | 609 | |
30ae764b | 610 | if (walker->get_verbosely) |
acc075a8 | 611 | fprintf(stderr, "Getting alternates list for %s\n", base); |
8fcf7f9a | 612 | |
acc075a8 NH |
613 | url = xmalloc(strlen(base) + 31); |
614 | sprintf(url, "%s/objects/info/http-alternates", base); | |
615 | ||
616 | /* Use a callback to process the result, since another request | |
617 | may fail and need to have alternates loaded before continuing */ | |
618 | slot = get_active_slot(); | |
e388ab74 | 619 | slot->callback_func = process_alternates_response; |
30ae764b | 620 | alt_req.walker = walker; |
acc075a8 NH |
621 | slot->callback_data = &alt_req; |
622 | ||
623 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); | |
29508e1e | 624 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); |
acc075a8 NH |
625 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); |
626 | ||
627 | alt_req.base = base; | |
628 | alt_req.url = url; | |
629 | alt_req.buffer = &buffer; | |
630 | alt_req.http_specific = 1; | |
631 | alt_req.slot = slot; | |
632 | ||
633 | if (start_active_slot(slot)) | |
634 | run_active_slot(slot); | |
635 | else | |
30ae764b | 636 | cdata->got_alternates = -1; |
acc075a8 | 637 | |
028c2976 | 638 | strbuf_release(&buffer); |
acc075a8 | 639 | free(url); |
b3661567 DB |
640 | } |
641 | ||
30ae764b | 642 | static int fetch_indices(struct walker *walker, struct alt_base *repo) |
182005b9 DB |
643 | { |
644 | unsigned char sha1[20]; | |
645 | char *url; | |
028c2976 | 646 | struct strbuf buffer = STRBUF_INIT; |
182005b9 DB |
647 | char *data; |
648 | int i = 0; | |
3a462bc9 | 649 | int ret = 0; |
182005b9 | 650 | |
1d389ab6 | 651 | struct active_request_slot *slot; |
cb754fdf | 652 | struct slot_results results; |
1d389ab6 | 653 | |
b3661567 | 654 | if (repo->got_indices) |
182005b9 DB |
655 | return 0; |
656 | ||
30ae764b | 657 | if (walker->get_verbosely) |
6fd72e39 | 658 | fprintf(stderr, "Getting pack list for %s\n", repo->base); |
8fcf7f9a | 659 | |
b3661567 DB |
660 | url = xmalloc(strlen(repo->base) + 21); |
661 | sprintf(url, "%s/objects/info/packs", repo->base); | |
182005b9 | 662 | |
1d389ab6 | 663 | slot = get_active_slot(); |
c8568e13 | 664 | slot->results = &results; |
1d389ab6 | 665 | curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); |
29508e1e | 666 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); |
1d389ab6 NH |
667 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); |
668 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); | |
669 | if (start_active_slot(slot)) { | |
670 | run_active_slot(slot); | |
c8568e13 | 671 | if (results.curl_result != CURLE_OK) { |
be4a015b | 672 | if (missing_target(&results)) { |
5e3a7691 | 673 | repo->got_indices = 1; |
3a462bc9 | 674 | goto cleanup; |
5e3a7691 NH |
675 | } else { |
676 | repo->got_indices = 0; | |
3a462bc9 MH |
677 | ret = error("%s", curl_errorstr); |
678 | goto cleanup; | |
5e3a7691 | 679 | } |
bc8f2652 | 680 | } |
1d389ab6 | 681 | } else { |
5e3a7691 | 682 | repo->got_indices = 0; |
3a462bc9 MH |
683 | ret = error("Unable to start request"); |
684 | goto cleanup; | |
1d389ab6 | 685 | } |
182005b9 | 686 | |
028c2976 MH |
687 | data = buffer.buf; |
688 | while (i < buffer.len) { | |
182005b9 DB |
689 | switch (data[i]) { |
690 | case 'P': | |
691 | i++; | |
028c2976 | 692 | if (i + 52 <= buffer.len && |
cc44c765 | 693 | !prefixcmp(data + i, " pack-") && |
1968d77d | 694 | !prefixcmp(data + i + 46, ".pack\n")) { |
182005b9 | 695 | get_sha1_hex(data + i + 6, sha1); |
30ae764b | 696 | setup_index(walker, repo, sha1); |
182005b9 DB |
697 | i += 51; |
698 | break; | |
699 | } | |
700 | default: | |
028c2976 | 701 | while (i < buffer.len && data[i] != '\n') |
182005b9 DB |
702 | i++; |
703 | } | |
704 | i++; | |
b3661567 | 705 | } |
182005b9 | 706 | |
b3661567 | 707 | repo->got_indices = 1; |
3a462bc9 MH |
708 | cleanup: |
709 | strbuf_release(&buffer); | |
710 | free(url); | |
711 | return ret; | |
182005b9 DB |
712 | } |
713 | ||
30ae764b | 714 | static int fetch_pack(struct walker *walker, struct alt_base *repo, unsigned char *sha1) |
182005b9 DB |
715 | { |
716 | char *url; | |
717 | struct packed_git *target; | |
718 | struct packed_git **lst; | |
719 | FILE *packfile; | |
720 | char *filename; | |
49a0f240 NH |
721 | char tmpfile[PATH_MAX]; |
722 | int ret; | |
723 | long prev_posn = 0; | |
724 | char range[RANGE_HEADER_SIZE]; | |
725 | struct curl_slist *range_header = NULL; | |
30ae764b | 726 | struct walker_data *data = walker->data; |
1d389ab6 NH |
727 | |
728 | struct active_request_slot *slot; | |
cb754fdf | 729 | struct slot_results results; |
182005b9 | 730 | |
30ae764b | 731 | if (fetch_indices(walker, repo)) |
182005b9 | 732 | return -1; |
b3661567 | 733 | target = find_sha1_pack(sha1, repo->packs); |
182005b9 | 734 | if (!target) |
b3661567 | 735 | return -1; |
182005b9 | 736 | |
30ae764b | 737 | if (walker->get_verbosely) { |
182005b9 DB |
738 | fprintf(stderr, "Getting pack %s\n", |
739 | sha1_to_hex(target->sha1)); | |
740 | fprintf(stderr, " which contains %s\n", | |
741 | sha1_to_hex(sha1)); | |
742 | } | |
743 | ||
b3661567 | 744 | url = xmalloc(strlen(repo->base) + 65); |
182005b9 | 745 | sprintf(url, "%s/objects/pack/pack-%s.pack", |
b3661567 | 746 | repo->base, sha1_to_hex(target->sha1)); |
182005b9 DB |
747 | |
748 | filename = sha1_pack_name(target->sha1); | |
49a0f240 NH |
749 | snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename); |
750 | packfile = fopen(tmpfile, "a"); | |
182005b9 DB |
751 | if (!packfile) |
752 | return error("Unable to open local file %s for pack", | |
84ef0338 | 753 | tmpfile); |
182005b9 | 754 | |
1d389ab6 | 755 | slot = get_active_slot(); |
c8568e13 | 756 | slot->results = &results; |
1d389ab6 NH |
757 | curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile); |
758 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
759 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
30ae764b | 760 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, data->no_pragma_header); |
1d389ab6 | 761 | slot->local = packfile; |
1ddea77e | 762 | |
49a0f240 NH |
763 | /* If there is data present from a previous transfer attempt, |
764 | resume where it left off */ | |
765 | prev_posn = ftell(packfile); | |
766 | if (prev_posn>0) { | |
30ae764b | 767 | if (walker->get_verbosely) |
49a0f240 NH |
768 | fprintf(stderr, |
769 | "Resuming fetch of pack %s at byte %ld\n", | |
770 | sha1_to_hex(target->sha1), prev_posn); | |
771 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
772 | range_header = curl_slist_append(range_header, range); | |
1d389ab6 | 773 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); |
49a0f240 NH |
774 | } |
775 | ||
1d389ab6 NH |
776 | if (start_active_slot(slot)) { |
777 | run_active_slot(slot); | |
c8568e13 | 778 | if (results.curl_result != CURLE_OK) { |
1d389ab6 NH |
779 | fclose(packfile); |
780 | return error("Unable to get pack file %s\n%s", url, | |
781 | curl_errorstr); | |
782 | } | |
783 | } else { | |
313c4714 | 784 | fclose(packfile); |
1d389ab6 | 785 | return error("Unable to start request"); |
182005b9 DB |
786 | } |
787 | ||
1c23d794 | 788 | target->pack_size = ftell(packfile); |
182005b9 DB |
789 | fclose(packfile); |
790 | ||
b721e01f | 791 | ret = move_temp_to_file(tmpfile, filename); |
49a0f240 | 792 | if (ret) |
b721e01f | 793 | return ret; |
49a0f240 | 794 | |
b3661567 | 795 | lst = &repo->packs; |
182005b9 DB |
796 | while (*lst != target) |
797 | lst = &((*lst)->next); | |
798 | *lst = (*lst)->next; | |
799 | ||
271421cd JH |
800 | if (verify_pack(target, 0)) |
801 | return -1; | |
182005b9 DB |
802 | install_packed_git(target); |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
53f31389 MW |
807 | static void abort_object_request(struct object_request *obj_req) |
808 | { | |
809 | if (obj_req->local >= 0) { | |
810 | close(obj_req->local); | |
811 | obj_req->local = -1; | |
812 | } | |
813 | unlink(obj_req->tmpfile); | |
814 | if (obj_req->slot) { | |
a6080a0a | 815 | release_active_slot(obj_req->slot); |
53f31389 MW |
816 | obj_req->slot = NULL; |
817 | } | |
818 | release_object_request(obj_req); | |
819 | } | |
820 | ||
30ae764b | 821 | static int fetch_object(struct walker *walker, struct alt_base *repo, unsigned char *sha1) |
6eb7ed54 DB |
822 | { |
823 | char *hex = sha1_to_hex(sha1); | |
29508e1e | 824 | int ret = 0; |
e388ab74 | 825 | struct object_request *obj_req = object_queue_head; |
1d389ab6 | 826 | |
a89fccd2 | 827 | while (obj_req != NULL && hashcmp(obj_req->sha1, sha1)) |
e388ab74 NH |
828 | obj_req = obj_req->next; |
829 | if (obj_req == NULL) | |
1d389ab6 NH |
830 | return error("Couldn't find request for %s in the queue", hex); |
831 | ||
e388ab74 | 832 | if (has_sha1_file(obj_req->sha1)) { |
53f31389 | 833 | abort_object_request(obj_req); |
11f0dafe NH |
834 | return 0; |
835 | } | |
836 | ||
a7a8d378 | 837 | #ifdef USE_CURL_MULTI |
e388ab74 | 838 | while (obj_req->state == WAITING) { |
29508e1e | 839 | step_active_slots(); |
1d389ab6 | 840 | } |
a7a8d378 | 841 | #else |
30ae764b | 842 | start_object_request(walker, obj_req); |
a7a8d378 | 843 | #endif |
6eb7ed54 | 844 | |
e388ab74 NH |
845 | while (obj_req->state == ACTIVE) { |
846 | run_active_slot(obj_req->slot); | |
a7a8d378 | 847 | } |
e388ab74 NH |
848 | if (obj_req->local != -1) { |
849 | close(obj_req->local); obj_req->local = -1; | |
313c4714 | 850 | } |
6eb7ed54 | 851 | |
e388ab74 | 852 | if (obj_req->state == ABORTED) { |
29508e1e | 853 | ret = error("Request for %s aborted", hex); |
e388ab74 NH |
854 | } else if (obj_req->curl_result != CURLE_OK && |
855 | obj_req->http_code != 416) { | |
be4a015b | 856 | if (missing_target(obj_req)) |
e2029eb9 PB |
857 | ret = -1; /* Be silent, it is probably in a pack. */ |
858 | else | |
859 | ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)", | |
e388ab74 NH |
860 | obj_req->errorstr, obj_req->curl_result, |
861 | obj_req->http_code, hex); | |
862 | } else if (obj_req->zret != Z_STREAM_END) { | |
30ae764b | 863 | walker->corrupt_object_found++; |
bd2afde8 | 864 | ret = error("File %s (%s) corrupt", hex, obj_req->url); |
a89fccd2 | 865 | } else if (hashcmp(obj_req->sha1, obj_req->real_sha1)) { |
bd2afde8 | 866 | ret = error("File %s has bad hash", hex); |
e388ab74 | 867 | } else if (obj_req->rename < 0) { |
7b934ec0 MW |
868 | ret = error("unable to write sha1 filename %s", |
869 | obj_req->filename); | |
6eb7ed54 | 870 | } |
49a0f240 | 871 | |
e388ab74 | 872 | release_object_request(obj_req); |
29508e1e | 873 | return ret; |
6eb7ed54 DB |
874 | } |
875 | ||
30ae764b | 876 | static int fetch(struct walker *walker, unsigned char *sha1) |
b3661567 | 877 | { |
30ae764b DB |
878 | struct walker_data *data = walker->data; |
879 | struct alt_base *altbase = data->alt; | |
1d389ab6 | 880 | |
30ae764b | 881 | if (!fetch_object(walker, altbase, sha1)) |
1d389ab6 | 882 | return 0; |
b3661567 | 883 | while (altbase) { |
30ae764b | 884 | if (!fetch_pack(walker, altbase, sha1)) |
b3661567 | 885 | return 0; |
30ae764b | 886 | fetch_alternates(walker, data->alt->base); |
b3661567 DB |
887 | altbase = altbase->next; |
888 | } | |
bd2afde8 | 889 | return error("Unable to find %s under %s", sha1_to_hex(sha1), |
30ae764b | 890 | data->alt->base); |
b3661567 DB |
891 | } |
892 | ||
c13b2633 | 893 | static int fetch_ref(struct walker *walker, struct ref *ref) |
cd541a68 | 894 | { |
30ae764b | 895 | struct walker_data *data = walker->data; |
c13b2633 | 896 | return http_fetch_ref(data->alt->base, ref); |
cd541a68 DB |
897 | } |
898 | ||
30ae764b DB |
899 | static void cleanup(struct walker *walker) |
900 | { | |
901 | struct walker_data *data = walker->data; | |
902 | http_cleanup(); | |
903 | ||
904 | curl_slist_free_all(data->no_pragma_header); | |
905 | } | |
906 | ||
9fc6440d | 907 | struct walker *get_http_walker(const char *url, struct remote *remote) |
6eb7ed54 | 908 | { |
9c880b3e | 909 | char *s; |
30ae764b DB |
910 | struct walker_data *data = xmalloc(sizeof(struct walker_data)); |
911 | struct walker *walker = xmalloc(sizeof(struct walker)); | |
6eb7ed54 | 912 | |
9fc6440d | 913 | http_init(remote); |
d402d556 | 914 | |
30ae764b | 915 | data->no_pragma_header = curl_slist_append(NULL, "Pragma:"); |
3dcb90f5 | 916 | |
30ae764b DB |
917 | data->alt = xmalloc(sizeof(*data->alt)); |
918 | data->alt->base = xmalloc(strlen(url) + 1); | |
919 | strcpy(data->alt->base, url); | |
920 | for (s = data->alt->base + strlen(data->alt->base) - 1; *s == '/'; --s) | |
9c880b3e | 921 | *s = 0; |
6eb7ed54 | 922 | |
30ae764b DB |
923 | data->alt->got_indices = 0; |
924 | data->alt->packs = NULL; | |
925 | data->alt->next = NULL; | |
926 | data->got_alternates = -1; | |
fc57b6aa | 927 | |
30ae764b DB |
928 | walker->corrupt_object_found = 0; |
929 | walker->fetch = fetch; | |
930 | walker->fetch_ref = fetch_ref; | |
931 | walker->prefetch = prefetch; | |
932 | walker->cleanup = cleanup; | |
933 | walker->data = data; | |
6eb7ed54 | 934 | |
30ae764b DB |
935 | #ifdef USE_CURL_MULTI |
936 | add_fill_function(walker, (int (*)(void *)) fill_active_slot); | |
937 | #endif | |
8e29f6a0 | 938 | |
30ae764b | 939 | return walker; |
6eb7ed54 | 940 | } |