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Commit | Line | Data |
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29508e1e | 1 | #include "http.h" |
2264dfa5 | 2 | #include "pack.h" |
29508e1e NH |
3 | |
4 | int data_received; | |
4251ccbd | 5 | int active_requests; |
e9176745 | 6 | int http_is_verbose; |
29508e1e NH |
7 | |
8 | #ifdef USE_CURL_MULTI | |
cc3530e8 MH |
9 | static int max_requests = -1; |
10 | static CURLM *curlm; | |
29508e1e NH |
11 | #endif |
12 | #ifndef NO_CURL_EASY_DUPHANDLE | |
cc3530e8 | 13 | static CURL *curl_default; |
29508e1e | 14 | #endif |
5424bc55 TRC |
15 | |
16 | #define PREV_BUF_SIZE 4096 | |
17 | #define RANGE_HEADER_SIZE 30 | |
18 | ||
29508e1e NH |
19 | char curl_errorstr[CURL_ERROR_SIZE]; |
20 | ||
cc3530e8 | 21 | static int curl_ssl_verify = -1; |
4251ccbd | 22 | static const char *ssl_cert; |
ef52aafa | 23 | #if LIBCURL_VERSION_NUM >= 0x070903 |
4251ccbd | 24 | static const char *ssl_key; |
29508e1e NH |
25 | #endif |
26 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
4251ccbd | 27 | static const char *ssl_capath; |
29508e1e | 28 | #endif |
4251ccbd | 29 | static const char *ssl_cainfo; |
cc3530e8 MH |
30 | static long curl_low_speed_limit = -1; |
31 | static long curl_low_speed_time = -1; | |
4251ccbd JH |
32 | static int curl_ftp_no_epsv; |
33 | static const char *curl_http_proxy; | |
c33976cb | 34 | static char *user_name, *user_pass; |
29508e1e | 35 | |
30dd9163 ML |
36 | #if LIBCURL_VERSION_NUM >= 0x071700 |
37 | /* Use CURLOPT_KEYPASSWD as is */ | |
38 | #elif LIBCURL_VERSION_NUM >= 0x070903 | |
39 | #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD | |
40 | #else | |
41 | #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD | |
42 | #endif | |
43 | ||
44 | static char *ssl_cert_password; | |
45 | static int ssl_cert_password_required; | |
46 | ||
cc3530e8 | 47 | static struct curl_slist *pragma_header; |
5424bc55 | 48 | static struct curl_slist *no_pragma_header; |
e9176745 | 49 | |
4251ccbd | 50 | static struct active_request_slot *active_queue_head; |
29508e1e | 51 | |
f444e528 | 52 | size_t fread_buffer(void *ptr, size_t eltsize, size_t nmemb, void *buffer_) |
29508e1e NH |
53 | { |
54 | size_t size = eltsize * nmemb; | |
f444e528 JH |
55 | struct buffer *buffer = buffer_; |
56 | ||
028c2976 MH |
57 | if (size > buffer->buf.len - buffer->posn) |
58 | size = buffer->buf.len - buffer->posn; | |
59 | memcpy(ptr, buffer->buf.buf + buffer->posn, size); | |
29508e1e | 60 | buffer->posn += size; |
028c2976 | 61 | |
29508e1e NH |
62 | return size; |
63 | } | |
64 | ||
3944ba0c MS |
65 | #ifndef NO_CURL_IOCTL |
66 | curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp) | |
67 | { | |
68 | struct buffer *buffer = clientp; | |
69 | ||
70 | switch (cmd) { | |
71 | case CURLIOCMD_NOP: | |
72 | return CURLIOE_OK; | |
73 | ||
74 | case CURLIOCMD_RESTARTREAD: | |
75 | buffer->posn = 0; | |
76 | return CURLIOE_OK; | |
77 | ||
78 | default: | |
79 | return CURLIOE_UNKNOWNCMD; | |
80 | } | |
81 | } | |
82 | #endif | |
83 | ||
f444e528 | 84 | size_t fwrite_buffer(const void *ptr, size_t eltsize, size_t nmemb, void *buffer_) |
29508e1e NH |
85 | { |
86 | size_t size = eltsize * nmemb; | |
f444e528 JH |
87 | struct strbuf *buffer = buffer_; |
88 | ||
028c2976 | 89 | strbuf_add(buffer, ptr, size); |
29508e1e NH |
90 | data_received++; |
91 | return size; | |
92 | } | |
93 | ||
f444e528 | 94 | size_t fwrite_null(const void *ptr, size_t eltsize, size_t nmemb, void *strbuf) |
29508e1e NH |
95 | { |
96 | data_received++; | |
97 | return eltsize * nmemb; | |
98 | } | |
99 | ||
100 | static void finish_active_slot(struct active_request_slot *slot); | |
101 | ||
102 | #ifdef USE_CURL_MULTI | |
103 | static void process_curl_messages(void) | |
104 | { | |
105 | int num_messages; | |
106 | struct active_request_slot *slot; | |
107 | CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages); | |
108 | ||
109 | while (curl_message != NULL) { | |
110 | if (curl_message->msg == CURLMSG_DONE) { | |
111 | int curl_result = curl_message->data.result; | |
112 | slot = active_queue_head; | |
113 | while (slot != NULL && | |
114 | slot->curl != curl_message->easy_handle) | |
115 | slot = slot->next; | |
116 | if (slot != NULL) { | |
117 | curl_multi_remove_handle(curlm, slot->curl); | |
118 | slot->curl_result = curl_result; | |
119 | finish_active_slot(slot); | |
120 | } else { | |
121 | fprintf(stderr, "Received DONE message for unknown request!\n"); | |
122 | } | |
123 | } else { | |
124 | fprintf(stderr, "Unknown CURL message received: %d\n", | |
125 | (int)curl_message->msg); | |
126 | } | |
127 | curl_message = curl_multi_info_read(curlm, &num_messages); | |
128 | } | |
129 | } | |
130 | #endif | |
131 | ||
ef90d6d4 | 132 | static int http_options(const char *var, const char *value, void *cb) |
29508e1e NH |
133 | { |
134 | if (!strcmp("http.sslverify", var)) { | |
7059cd99 | 135 | curl_ssl_verify = git_config_bool(var, value); |
29508e1e NH |
136 | return 0; |
137 | } | |
7059cd99 JH |
138 | if (!strcmp("http.sslcert", var)) |
139 | return git_config_string(&ssl_cert, var, value); | |
ef52aafa | 140 | #if LIBCURL_VERSION_NUM >= 0x070903 |
7059cd99 JH |
141 | if (!strcmp("http.sslkey", var)) |
142 | return git_config_string(&ssl_key, var, value); | |
29508e1e NH |
143 | #endif |
144 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
7059cd99 JH |
145 | if (!strcmp("http.sslcapath", var)) |
146 | return git_config_string(&ssl_capath, var, value); | |
29508e1e | 147 | #endif |
7059cd99 JH |
148 | if (!strcmp("http.sslcainfo", var)) |
149 | return git_config_string(&ssl_cainfo, var, value); | |
754ae192 ML |
150 | if (!strcmp("http.sslcertpasswordprotected", var)) { |
151 | if (git_config_bool(var, value)) | |
152 | ssl_cert_password_required = 1; | |
153 | return 0; | |
154 | } | |
a6080a0a | 155 | #ifdef USE_CURL_MULTI |
29508e1e | 156 | if (!strcmp("http.maxrequests", var)) { |
7059cd99 | 157 | max_requests = git_config_int(var, value); |
29508e1e NH |
158 | return 0; |
159 | } | |
160 | #endif | |
29508e1e | 161 | if (!strcmp("http.lowspeedlimit", var)) { |
7059cd99 | 162 | curl_low_speed_limit = (long)git_config_int(var, value); |
29508e1e NH |
163 | return 0; |
164 | } | |
165 | if (!strcmp("http.lowspeedtime", var)) { | |
7059cd99 | 166 | curl_low_speed_time = (long)git_config_int(var, value); |
29508e1e NH |
167 | return 0; |
168 | } | |
169 | ||
3ea099d4 SK |
170 | if (!strcmp("http.noepsv", var)) { |
171 | curl_ftp_no_epsv = git_config_bool(var, value); | |
172 | return 0; | |
173 | } | |
7059cd99 JH |
174 | if (!strcmp("http.proxy", var)) |
175 | return git_config_string(&curl_http_proxy, var, value); | |
3ea099d4 | 176 | |
29508e1e | 177 | /* Fall back on the default ones */ |
ef90d6d4 | 178 | return git_default_config(var, value, cb); |
29508e1e NH |
179 | } |
180 | ||
c33976cb JH |
181 | static void init_curl_http_auth(CURL *result) |
182 | { | |
750d9305 | 183 | if (user_name) { |
c33976cb JH |
184 | struct strbuf up = STRBUF_INIT; |
185 | if (!user_pass) | |
186 | user_pass = xstrdup(getpass("Password: ")); | |
187 | strbuf_addf(&up, "%s:%s", user_name, user_pass); | |
188 | curl_easy_setopt(result, CURLOPT_USERPWD, | |
189 | strbuf_detach(&up, NULL)); | |
190 | } | |
191 | } | |
192 | ||
30dd9163 ML |
193 | static int has_cert_password(void) |
194 | { | |
195 | if (ssl_cert_password != NULL) | |
196 | return 1; | |
197 | if (ssl_cert == NULL || ssl_cert_password_required != 1) | |
198 | return 0; | |
199 | /* Only prompt the user once. */ | |
200 | ssl_cert_password_required = -1; | |
201 | ssl_cert_password = getpass("Certificate Password: "); | |
202 | if (ssl_cert_password != NULL) { | |
203 | ssl_cert_password = xstrdup(ssl_cert_password); | |
204 | return 1; | |
205 | } else | |
206 | return 0; | |
207 | } | |
208 | ||
4251ccbd | 209 | static CURL *get_curl_handle(void) |
11979b98 | 210 | { |
4251ccbd | 211 | CURL *result = curl_easy_init(); |
11979b98 | 212 | |
a5ccc597 JH |
213 | if (!curl_ssl_verify) { |
214 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0); | |
215 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0); | |
216 | } else { | |
217 | /* Verify authenticity of the peer's certificate */ | |
218 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1); | |
219 | /* The name in the cert must match whom we tried to connect */ | |
220 | curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2); | |
221 | } | |
222 | ||
11979b98 JH |
223 | #if LIBCURL_VERSION_NUM >= 0x070907 |
224 | curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL); | |
225 | #endif | |
226 | ||
c33976cb JH |
227 | init_curl_http_auth(result); |
228 | ||
11979b98 JH |
229 | if (ssl_cert != NULL) |
230 | curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert); | |
30dd9163 ML |
231 | if (has_cert_password()) |
232 | curl_easy_setopt(result, CURLOPT_KEYPASSWD, ssl_cert_password); | |
ef52aafa | 233 | #if LIBCURL_VERSION_NUM >= 0x070903 |
11979b98 JH |
234 | if (ssl_key != NULL) |
235 | curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key); | |
236 | #endif | |
237 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
238 | if (ssl_capath != NULL) | |
239 | curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath); | |
240 | #endif | |
241 | if (ssl_cainfo != NULL) | |
242 | curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo); | |
243 | curl_easy_setopt(result, CURLOPT_FAILONERROR, 1); | |
244 | ||
245 | if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) { | |
246 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT, | |
247 | curl_low_speed_limit); | |
248 | curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME, | |
249 | curl_low_speed_time); | |
250 | } | |
251 | ||
252 | curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1); | |
253 | ||
7982d74e MW |
254 | if (getenv("GIT_CURL_VERBOSE")) |
255 | curl_easy_setopt(result, CURLOPT_VERBOSE, 1); | |
256 | ||
20fc9bc5 NH |
257 | curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT); |
258 | ||
3ea099d4 SK |
259 | if (curl_ftp_no_epsv) |
260 | curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0); | |
261 | ||
9c5665aa SV |
262 | if (curl_http_proxy) |
263 | curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy); | |
264 | ||
11979b98 JH |
265 | return result; |
266 | } | |
267 | ||
c33976cb JH |
268 | static void http_auth_init(const char *url) |
269 | { | |
270 | char *at, *colon, *cp, *slash; | |
271 | int len; | |
272 | ||
273 | cp = strstr(url, "://"); | |
274 | if (!cp) | |
275 | return; | |
276 | ||
277 | /* | |
278 | * Ok, the URL looks like "proto://something". Which one? | |
279 | * "proto://<user>:<pass>@<host>/...", | |
280 | * "proto://<user>@<host>/...", or just | |
281 | * "proto://<host>/..."? | |
282 | */ | |
283 | cp += 3; | |
284 | at = strchr(cp, '@'); | |
285 | colon = strchr(cp, ':'); | |
286 | slash = strchrnul(cp, '/'); | |
287 | if (!at || slash <= at) | |
288 | return; /* No credentials */ | |
289 | if (!colon || at <= colon) { | |
290 | /* Only username */ | |
291 | len = at - cp; | |
292 | user_name = xmalloc(len + 1); | |
293 | memcpy(user_name, cp, len); | |
294 | user_name[len] = '\0'; | |
295 | user_pass = NULL; | |
296 | } else { | |
297 | len = colon - cp; | |
298 | user_name = xmalloc(len + 1); | |
299 | memcpy(user_name, cp, len); | |
300 | user_name[len] = '\0'; | |
301 | len = at - (colon + 1); | |
302 | user_pass = xmalloc(len + 1); | |
303 | memcpy(user_pass, colon + 1, len); | |
304 | user_pass[len] = '\0'; | |
305 | } | |
306 | } | |
307 | ||
7059cd99 JH |
308 | static void set_from_env(const char **var, const char *envname) |
309 | { | |
310 | const char *val = getenv(envname); | |
311 | if (val) | |
312 | *var = val; | |
313 | } | |
314 | ||
9fc6440d | 315 | void http_init(struct remote *remote) |
29508e1e NH |
316 | { |
317 | char *low_speed_limit; | |
318 | char *low_speed_time; | |
319 | ||
e9176745 TRC |
320 | http_is_verbose = 0; |
321 | ||
7059cd99 JH |
322 | git_config(http_options, NULL); |
323 | ||
29508e1e NH |
324 | curl_global_init(CURL_GLOBAL_ALL); |
325 | ||
9fc6440d MH |
326 | if (remote && remote->http_proxy) |
327 | curl_http_proxy = xstrdup(remote->http_proxy); | |
328 | ||
29508e1e | 329 | pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache"); |
e9176745 | 330 | no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:"); |
29508e1e NH |
331 | |
332 | #ifdef USE_CURL_MULTI | |
333 | { | |
334 | char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS"); | |
335 | if (http_max_requests != NULL) | |
336 | max_requests = atoi(http_max_requests); | |
337 | } | |
338 | ||
339 | curlm = curl_multi_init(); | |
340 | if (curlm == NULL) { | |
341 | fprintf(stderr, "Error creating curl multi handle.\n"); | |
342 | exit(1); | |
343 | } | |
344 | #endif | |
345 | ||
346 | if (getenv("GIT_SSL_NO_VERIFY")) | |
347 | curl_ssl_verify = 0; | |
348 | ||
7059cd99 | 349 | set_from_env(&ssl_cert, "GIT_SSL_CERT"); |
ef52aafa | 350 | #if LIBCURL_VERSION_NUM >= 0x070903 |
7059cd99 | 351 | set_from_env(&ssl_key, "GIT_SSL_KEY"); |
29508e1e NH |
352 | #endif |
353 | #if LIBCURL_VERSION_NUM >= 0x070908 | |
7059cd99 | 354 | set_from_env(&ssl_capath, "GIT_SSL_CAPATH"); |
29508e1e | 355 | #endif |
7059cd99 | 356 | set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO"); |
29508e1e NH |
357 | |
358 | low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT"); | |
359 | if (low_speed_limit != NULL) | |
360 | curl_low_speed_limit = strtol(low_speed_limit, NULL, 10); | |
361 | low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME"); | |
362 | if (low_speed_time != NULL) | |
363 | curl_low_speed_time = strtol(low_speed_time, NULL, 10); | |
364 | ||
29508e1e NH |
365 | if (curl_ssl_verify == -1) |
366 | curl_ssl_verify = 1; | |
367 | ||
368 | #ifdef USE_CURL_MULTI | |
369 | if (max_requests < 1) | |
370 | max_requests = DEFAULT_MAX_REQUESTS; | |
371 | #endif | |
372 | ||
3ea099d4 SK |
373 | if (getenv("GIT_CURL_FTP_NO_EPSV")) |
374 | curl_ftp_no_epsv = 1; | |
375 | ||
30dd9163 | 376 | if (remote && remote->url && remote->url[0]) { |
c33976cb | 377 | http_auth_init(remote->url[0]); |
754ae192 ML |
378 | if (!ssl_cert_password_required && |
379 | getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") && | |
380 | !prefixcmp(remote->url[0], "https://")) | |
30dd9163 ML |
381 | ssl_cert_password_required = 1; |
382 | } | |
c33976cb | 383 | |
29508e1e NH |
384 | #ifndef NO_CURL_EASY_DUPHANDLE |
385 | curl_default = get_curl_handle(); | |
386 | #endif | |
387 | } | |
388 | ||
389 | void http_cleanup(void) | |
390 | { | |
391 | struct active_request_slot *slot = active_queue_head; | |
29508e1e NH |
392 | |
393 | while (slot != NULL) { | |
3278cd0a | 394 | struct active_request_slot *next = slot->next; |
f23d1f76 | 395 | if (slot->curl != NULL) { |
29508e1e | 396 | #ifdef USE_CURL_MULTI |
f23d1f76 | 397 | curl_multi_remove_handle(curlm, slot->curl); |
29508e1e | 398 | #endif |
29508e1e | 399 | curl_easy_cleanup(slot->curl); |
f23d1f76 | 400 | } |
3278cd0a SP |
401 | free(slot); |
402 | slot = next; | |
29508e1e | 403 | } |
3278cd0a | 404 | active_queue_head = NULL; |
29508e1e NH |
405 | |
406 | #ifndef NO_CURL_EASY_DUPHANDLE | |
407 | curl_easy_cleanup(curl_default); | |
408 | #endif | |
409 | ||
410 | #ifdef USE_CURL_MULTI | |
411 | curl_multi_cleanup(curlm); | |
412 | #endif | |
413 | curl_global_cleanup(); | |
b3ca4e4e NH |
414 | |
415 | curl_slist_free_all(pragma_header); | |
3278cd0a | 416 | pragma_header = NULL; |
9fc6440d | 417 | |
e9176745 TRC |
418 | curl_slist_free_all(no_pragma_header); |
419 | no_pragma_header = NULL; | |
420 | ||
9fc6440d | 421 | if (curl_http_proxy) { |
e4a80ecf | 422 | free((void *)curl_http_proxy); |
9fc6440d MH |
423 | curl_http_proxy = NULL; |
424 | } | |
30dd9163 ML |
425 | |
426 | if (ssl_cert_password != NULL) { | |
427 | memset(ssl_cert_password, 0, strlen(ssl_cert_password)); | |
428 | free(ssl_cert_password); | |
429 | ssl_cert_password = NULL; | |
430 | } | |
431 | ssl_cert_password_required = 0; | |
29508e1e NH |
432 | } |
433 | ||
29508e1e NH |
434 | struct active_request_slot *get_active_slot(void) |
435 | { | |
436 | struct active_request_slot *slot = active_queue_head; | |
437 | struct active_request_slot *newslot; | |
438 | ||
439 | #ifdef USE_CURL_MULTI | |
440 | int num_transfers; | |
441 | ||
442 | /* Wait for a slot to open up if the queue is full */ | |
443 | while (active_requests >= max_requests) { | |
444 | curl_multi_perform(curlm, &num_transfers); | |
4251ccbd | 445 | if (num_transfers < active_requests) |
29508e1e | 446 | process_curl_messages(); |
29508e1e NH |
447 | } |
448 | #endif | |
449 | ||
4251ccbd | 450 | while (slot != NULL && slot->in_use) |
29508e1e | 451 | slot = slot->next; |
4251ccbd | 452 | |
29508e1e NH |
453 | if (slot == NULL) { |
454 | newslot = xmalloc(sizeof(*newslot)); | |
455 | newslot->curl = NULL; | |
456 | newslot->in_use = 0; | |
457 | newslot->next = NULL; | |
458 | ||
459 | slot = active_queue_head; | |
460 | if (slot == NULL) { | |
461 | active_queue_head = newslot; | |
462 | } else { | |
4251ccbd | 463 | while (slot->next != NULL) |
29508e1e | 464 | slot = slot->next; |
29508e1e NH |
465 | slot->next = newslot; |
466 | } | |
467 | slot = newslot; | |
468 | } | |
469 | ||
470 | if (slot->curl == NULL) { | |
471 | #ifdef NO_CURL_EASY_DUPHANDLE | |
472 | slot->curl = get_curl_handle(); | |
473 | #else | |
474 | slot->curl = curl_easy_duphandle(curl_default); | |
475 | #endif | |
476 | } | |
477 | ||
478 | active_requests++; | |
479 | slot->in_use = 1; | |
480 | slot->local = NULL; | |
c8568e13 | 481 | slot->results = NULL; |
baa7b67d | 482 | slot->finished = NULL; |
29508e1e NH |
483 | slot->callback_data = NULL; |
484 | slot->callback_func = NULL; | |
485 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); | |
29508e1e | 486 | curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); |
9094950d NH |
487 | curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); |
488 | curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); | |
489 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL); | |
490 | curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0); | |
491 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
29508e1e NH |
492 | |
493 | return slot; | |
494 | } | |
495 | ||
496 | int start_active_slot(struct active_request_slot *slot) | |
497 | { | |
498 | #ifdef USE_CURL_MULTI | |
499 | CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl); | |
45c17412 | 500 | int num_transfers; |
29508e1e NH |
501 | |
502 | if (curlm_result != CURLM_OK && | |
503 | curlm_result != CURLM_CALL_MULTI_PERFORM) { | |
504 | active_requests--; | |
505 | slot->in_use = 0; | |
506 | return 0; | |
507 | } | |
45c17412 DB |
508 | |
509 | /* | |
510 | * We know there must be something to do, since we just added | |
511 | * something. | |
512 | */ | |
513 | curl_multi_perform(curlm, &num_transfers); | |
29508e1e NH |
514 | #endif |
515 | return 1; | |
516 | } | |
517 | ||
518 | #ifdef USE_CURL_MULTI | |
fc57b6aa DB |
519 | struct fill_chain { |
520 | void *data; | |
521 | int (*fill)(void *); | |
522 | struct fill_chain *next; | |
523 | }; | |
524 | ||
4251ccbd | 525 | static struct fill_chain *fill_cfg; |
fc57b6aa DB |
526 | |
527 | void add_fill_function(void *data, int (*fill)(void *)) | |
528 | { | |
e8eec71d | 529 | struct fill_chain *new = xmalloc(sizeof(*new)); |
fc57b6aa DB |
530 | struct fill_chain **linkp = &fill_cfg; |
531 | new->data = data; | |
532 | new->fill = fill; | |
533 | new->next = NULL; | |
534 | while (*linkp) | |
535 | linkp = &(*linkp)->next; | |
536 | *linkp = new; | |
537 | } | |
538 | ||
45c17412 DB |
539 | void fill_active_slots(void) |
540 | { | |
541 | struct active_request_slot *slot = active_queue_head; | |
542 | ||
fc57b6aa DB |
543 | while (active_requests < max_requests) { |
544 | struct fill_chain *fill; | |
545 | for (fill = fill_cfg; fill; fill = fill->next) | |
546 | if (fill->fill(fill->data)) | |
547 | break; | |
548 | ||
549 | if (!fill) | |
45c17412 | 550 | break; |
fc57b6aa | 551 | } |
45c17412 DB |
552 | |
553 | while (slot != NULL) { | |
554 | if (!slot->in_use && slot->curl != NULL) { | |
555 | curl_easy_cleanup(slot->curl); | |
556 | slot->curl = NULL; | |
557 | } | |
558 | slot = slot->next; | |
559 | } | |
560 | } | |
561 | ||
29508e1e NH |
562 | void step_active_slots(void) |
563 | { | |
564 | int num_transfers; | |
565 | CURLMcode curlm_result; | |
566 | ||
567 | do { | |
568 | curlm_result = curl_multi_perform(curlm, &num_transfers); | |
569 | } while (curlm_result == CURLM_CALL_MULTI_PERFORM); | |
570 | if (num_transfers < active_requests) { | |
571 | process_curl_messages(); | |
572 | fill_active_slots(); | |
573 | } | |
574 | } | |
575 | #endif | |
576 | ||
577 | void run_active_slot(struct active_request_slot *slot) | |
578 | { | |
579 | #ifdef USE_CURL_MULTI | |
580 | long last_pos = 0; | |
581 | long current_pos; | |
582 | fd_set readfds; | |
583 | fd_set writefds; | |
584 | fd_set excfds; | |
585 | int max_fd; | |
586 | struct timeval select_timeout; | |
baa7b67d | 587 | int finished = 0; |
29508e1e | 588 | |
baa7b67d NH |
589 | slot->finished = &finished; |
590 | while (!finished) { | |
29508e1e NH |
591 | data_received = 0; |
592 | step_active_slots(); | |
593 | ||
594 | if (!data_received && slot->local != NULL) { | |
595 | current_pos = ftell(slot->local); | |
596 | if (current_pos > last_pos) | |
597 | data_received++; | |
598 | last_pos = current_pos; | |
599 | } | |
600 | ||
601 | if (slot->in_use && !data_received) { | |
602 | max_fd = 0; | |
603 | FD_ZERO(&readfds); | |
604 | FD_ZERO(&writefds); | |
605 | FD_ZERO(&excfds); | |
606 | select_timeout.tv_sec = 0; | |
607 | select_timeout.tv_usec = 50000; | |
608 | select(max_fd, &readfds, &writefds, | |
609 | &excfds, &select_timeout); | |
610 | } | |
611 | } | |
612 | #else | |
613 | while (slot->in_use) { | |
614 | slot->curl_result = curl_easy_perform(slot->curl); | |
615 | finish_active_slot(slot); | |
616 | } | |
617 | #endif | |
618 | } | |
619 | ||
53f31389 | 620 | static void closedown_active_slot(struct active_request_slot *slot) |
29508e1e | 621 | { |
028c2976 MH |
622 | active_requests--; |
623 | slot->in_use = 0; | |
53f31389 MW |
624 | } |
625 | ||
626 | void release_active_slot(struct active_request_slot *slot) | |
627 | { | |
628 | closedown_active_slot(slot); | |
629 | if (slot->curl) { | |
b3ca4e4e | 630 | #ifdef USE_CURL_MULTI |
53f31389 | 631 | curl_multi_remove_handle(curlm, slot->curl); |
b3ca4e4e | 632 | #endif |
53f31389 MW |
633 | curl_easy_cleanup(slot->curl); |
634 | slot->curl = NULL; | |
635 | } | |
b3ca4e4e | 636 | #ifdef USE_CURL_MULTI |
53f31389 | 637 | fill_active_slots(); |
b3ca4e4e | 638 | #endif |
53f31389 MW |
639 | } |
640 | ||
641 | static void finish_active_slot(struct active_request_slot *slot) | |
642 | { | |
643 | closedown_active_slot(slot); | |
028c2976 | 644 | curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code); |
c8568e13 | 645 | |
baa7b67d NH |
646 | if (slot->finished != NULL) |
647 | (*slot->finished) = 1; | |
648 | ||
c8568e13 NH |
649 | /* Store slot results so they can be read after the slot is reused */ |
650 | if (slot->results != NULL) { | |
651 | slot->results->curl_result = slot->curl_result; | |
652 | slot->results->http_code = slot->http_code; | |
653 | } | |
654 | ||
028c2976 | 655 | /* Run callback if appropriate */ |
4251ccbd | 656 | if (slot->callback_func != NULL) |
028c2976 | 657 | slot->callback_func(slot->callback_data); |
29508e1e NH |
658 | } |
659 | ||
660 | void finish_all_active_slots(void) | |
661 | { | |
662 | struct active_request_slot *slot = active_queue_head; | |
663 | ||
664 | while (slot != NULL) | |
665 | if (slot->in_use) { | |
666 | run_active_slot(slot); | |
667 | slot = active_queue_head; | |
668 | } else { | |
669 | slot = slot->next; | |
670 | } | |
671 | } | |
d7e92806 | 672 | |
5ace994f | 673 | /* Helpers for modifying and creating URLs */ |
d7e92806 MH |
674 | static inline int needs_quote(int ch) |
675 | { | |
676 | if (((ch >= 'A') && (ch <= 'Z')) | |
677 | || ((ch >= 'a') && (ch <= 'z')) | |
678 | || ((ch >= '0') && (ch <= '9')) | |
679 | || (ch == '/') | |
680 | || (ch == '-') | |
681 | || (ch == '.')) | |
682 | return 0; | |
683 | return 1; | |
684 | } | |
685 | ||
686 | static inline int hex(int v) | |
687 | { | |
4251ccbd JH |
688 | if (v < 10) |
689 | return '0' + v; | |
690 | else | |
691 | return 'A' + v - 10; | |
d7e92806 MH |
692 | } |
693 | ||
5ace994f TRC |
694 | static void end_url_with_slash(struct strbuf *buf, const char *url) |
695 | { | |
696 | strbuf_addstr(buf, url); | |
697 | if (buf->len && buf->buf[buf->len - 1] != '/') | |
698 | strbuf_addstr(buf, "/"); | |
699 | } | |
700 | ||
d7e92806 MH |
701 | static char *quote_ref_url(const char *base, const char *ref) |
702 | { | |
113106e0 | 703 | struct strbuf buf = STRBUF_INIT; |
d7e92806 | 704 | const char *cp; |
113106e0 | 705 | int ch; |
d7e92806 | 706 | |
5ace994f | 707 | end_url_with_slash(&buf, base); |
113106e0 TRC |
708 | |
709 | for (cp = ref; (ch = *cp) != 0; cp++) | |
d7e92806 | 710 | if (needs_quote(ch)) |
113106e0 | 711 | strbuf_addf(&buf, "%%%02x", ch); |
d7e92806 | 712 | else |
113106e0 | 713 | strbuf_addch(&buf, *cp); |
d7e92806 | 714 | |
113106e0 | 715 | return strbuf_detach(&buf, NULL); |
d7e92806 MH |
716 | } |
717 | ||
5424bc55 TRC |
718 | void append_remote_object_url(struct strbuf *buf, const char *url, |
719 | const char *hex, | |
720 | int only_two_digit_prefix) | |
721 | { | |
722 | strbuf_addf(buf, "%s/objects/%.*s/", url, 2, hex); | |
723 | if (!only_two_digit_prefix) | |
724 | strbuf_addf(buf, "%s", hex+2); | |
725 | } | |
726 | ||
727 | char *get_remote_object_url(const char *url, const char *hex, | |
728 | int only_two_digit_prefix) | |
729 | { | |
730 | struct strbuf buf = STRBUF_INIT; | |
731 | append_remote_object_url(&buf, url, hex, only_two_digit_prefix); | |
732 | return strbuf_detach(&buf, NULL); | |
733 | } | |
734 | ||
e929cd20 MH |
735 | /* http_request() targets */ |
736 | #define HTTP_REQUEST_STRBUF 0 | |
737 | #define HTTP_REQUEST_FILE 1 | |
738 | ||
739 | static int http_request(const char *url, void *result, int target, int options) | |
740 | { | |
741 | struct active_request_slot *slot; | |
742 | struct slot_results results; | |
743 | struct curl_slist *headers = NULL; | |
744 | struct strbuf buf = STRBUF_INIT; | |
745 | int ret; | |
746 | ||
747 | slot = get_active_slot(); | |
748 | slot->results = &results; | |
749 | curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); | |
750 | ||
751 | if (result == NULL) { | |
752 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); | |
753 | } else { | |
754 | curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); | |
755 | curl_easy_setopt(slot->curl, CURLOPT_FILE, result); | |
756 | ||
757 | if (target == HTTP_REQUEST_FILE) { | |
758 | long posn = ftell(result); | |
759 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
760 | fwrite); | |
761 | if (posn > 0) { | |
762 | strbuf_addf(&buf, "Range: bytes=%ld-", posn); | |
763 | headers = curl_slist_append(headers, buf.buf); | |
764 | strbuf_reset(&buf); | |
765 | } | |
766 | slot->local = result; | |
767 | } else | |
768 | curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, | |
769 | fwrite_buffer); | |
770 | } | |
771 | ||
772 | strbuf_addstr(&buf, "Pragma:"); | |
773 | if (options & HTTP_NO_CACHE) | |
774 | strbuf_addstr(&buf, " no-cache"); | |
775 | ||
776 | headers = curl_slist_append(headers, buf.buf); | |
777 | ||
778 | curl_easy_setopt(slot->curl, CURLOPT_URL, url); | |
779 | curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); | |
780 | ||
781 | if (start_active_slot(slot)) { | |
782 | run_active_slot(slot); | |
783 | if (results.curl_result == CURLE_OK) | |
784 | ret = HTTP_OK; | |
785 | else if (missing_target(&results)) | |
786 | ret = HTTP_MISSING_TARGET; | |
787 | else | |
788 | ret = HTTP_ERROR; | |
789 | } else { | |
790 | error("Unable to start HTTP request for %s", url); | |
791 | ret = HTTP_START_FAILED; | |
792 | } | |
793 | ||
794 | slot->local = NULL; | |
795 | curl_slist_free_all(headers); | |
796 | strbuf_release(&buf); | |
797 | ||
798 | return ret; | |
799 | } | |
800 | ||
801 | int http_get_strbuf(const char *url, struct strbuf *result, int options) | |
802 | { | |
803 | return http_request(url, result, HTTP_REQUEST_STRBUF, options); | |
804 | } | |
805 | ||
806 | int http_get_file(const char *url, const char *filename, int options) | |
807 | { | |
808 | int ret; | |
809 | struct strbuf tmpfile = STRBUF_INIT; | |
810 | FILE *result; | |
811 | ||
812 | strbuf_addf(&tmpfile, "%s.temp", filename); | |
813 | result = fopen(tmpfile.buf, "a"); | |
814 | if (! result) { | |
815 | error("Unable to open local file %s", tmpfile.buf); | |
816 | ret = HTTP_ERROR; | |
817 | goto cleanup; | |
818 | } | |
819 | ||
820 | ret = http_request(url, result, HTTP_REQUEST_FILE, options); | |
821 | fclose(result); | |
822 | ||
823 | if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename)) | |
824 | ret = HTTP_ERROR; | |
825 | cleanup: | |
826 | strbuf_release(&tmpfile); | |
827 | return ret; | |
828 | } | |
829 | ||
830 | int http_error(const char *url, int ret) | |
831 | { | |
832 | /* http_request has already handled HTTP_START_FAILED. */ | |
833 | if (ret != HTTP_START_FAILED) | |
834 | error("%s while accessing %s\n", curl_errorstr, url); | |
835 | ||
836 | return ret; | |
837 | } | |
838 | ||
c13b2633 | 839 | int http_fetch_ref(const char *base, struct ref *ref) |
d7e92806 MH |
840 | { |
841 | char *url; | |
842 | struct strbuf buffer = STRBUF_INIT; | |
0d5896e1 | 843 | int ret = -1; |
d7e92806 | 844 | |
c13b2633 | 845 | url = quote_ref_url(base, ref->name); |
0d5896e1 MH |
846 | if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) { |
847 | strbuf_rtrim(&buffer); | |
848 | if (buffer.len == 40) | |
849 | ret = get_sha1_hex(buffer.buf, ref->old_sha1); | |
850 | else if (!prefixcmp(buffer.buf, "ref: ")) { | |
851 | ref->symref = xstrdup(buffer.buf + 5); | |
852 | ret = 0; | |
d7e92806 | 853 | } |
d7e92806 MH |
854 | } |
855 | ||
856 | strbuf_release(&buffer); | |
857 | free(url); | |
858 | return ret; | |
859 | } | |
b8caac2b TRC |
860 | |
861 | /* Helpers for fetching packs */ | |
862 | static int fetch_pack_index(unsigned char *sha1, const char *base_url) | |
863 | { | |
864 | int ret = 0; | |
865 | char *hex = xstrdup(sha1_to_hex(sha1)); | |
866 | char *filename; | |
867 | char *url; | |
b8caac2b | 868 | struct strbuf buf = STRBUF_INIT; |
b8caac2b TRC |
869 | |
870 | /* Don't use the index if the pack isn't there */ | |
871 | end_url_with_slash(&buf, base_url); | |
872 | strbuf_addf(&buf, "objects/pack/pack-%s.pack", hex); | |
873 | url = strbuf_detach(&buf, 0); | |
874 | ||
39dc52cf TRC |
875 | if (http_get_strbuf(url, NULL, 0)) { |
876 | ret = error("Unable to verify pack %s is available", | |
877 | hex); | |
878 | goto cleanup; | |
b8caac2b TRC |
879 | } |
880 | ||
881 | if (has_pack_index(sha1)) { | |
882 | ret = 0; | |
39dc52cf | 883 | goto cleanup; |
b8caac2b TRC |
884 | } |
885 | ||
886 | if (http_is_verbose) | |
887 | fprintf(stderr, "Getting index for pack %s\n", hex); | |
888 | ||
889 | end_url_with_slash(&buf, base_url); | |
890 | strbuf_addf(&buf, "objects/pack/pack-%s.idx", hex); | |
891 | url = strbuf_detach(&buf, NULL); | |
892 | ||
893 | filename = sha1_pack_index_name(sha1); | |
39dc52cf TRC |
894 | if (http_get_file(url, filename, 0) != HTTP_OK) |
895 | ret = error("Unable to get pack index %s\n", url); | |
b8caac2b | 896 | |
39dc52cf | 897 | cleanup: |
b8caac2b TRC |
898 | free(hex); |
899 | free(url); | |
900 | return ret; | |
901 | } | |
902 | ||
903 | static int fetch_and_setup_pack_index(struct packed_git **packs_head, | |
904 | unsigned char *sha1, const char *base_url) | |
905 | { | |
906 | struct packed_git *new_pack; | |
907 | ||
908 | if (fetch_pack_index(sha1, base_url)) | |
909 | return -1; | |
910 | ||
911 | new_pack = parse_pack_index(sha1); | |
912 | if (!new_pack) | |
913 | return -1; /* parse_pack_index() already issued error message */ | |
914 | new_pack->next = *packs_head; | |
915 | *packs_head = new_pack; | |
916 | return 0; | |
917 | } | |
918 | ||
919 | int http_get_info_packs(const char *base_url, struct packed_git **packs_head) | |
920 | { | |
921 | int ret = 0, i = 0; | |
922 | char *url, *data; | |
923 | struct strbuf buf = STRBUF_INIT; | |
924 | unsigned char sha1[20]; | |
925 | ||
926 | end_url_with_slash(&buf, base_url); | |
927 | strbuf_addstr(&buf, "objects/info/packs"); | |
928 | url = strbuf_detach(&buf, NULL); | |
929 | ||
930 | ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE); | |
931 | if (ret != HTTP_OK) | |
932 | goto cleanup; | |
933 | ||
934 | data = buf.buf; | |
935 | while (i < buf.len) { | |
936 | switch (data[i]) { | |
937 | case 'P': | |
938 | i++; | |
939 | if (i + 52 <= buf.len && | |
940 | !prefixcmp(data + i, " pack-") && | |
941 | !prefixcmp(data + i + 46, ".pack\n")) { | |
942 | get_sha1_hex(data + i + 6, sha1); | |
943 | fetch_and_setup_pack_index(packs_head, sha1, | |
944 | base_url); | |
945 | i += 51; | |
946 | break; | |
947 | } | |
948 | default: | |
949 | while (i < buf.len && data[i] != '\n') | |
950 | i++; | |
951 | } | |
952 | i++; | |
953 | } | |
954 | ||
955 | cleanup: | |
956 | free(url); | |
957 | return ret; | |
958 | } | |
2264dfa5 TRC |
959 | |
960 | void release_http_pack_request(struct http_pack_request *preq) | |
961 | { | |
962 | if (preq->packfile != NULL) { | |
963 | fclose(preq->packfile); | |
964 | preq->packfile = NULL; | |
965 | preq->slot->local = NULL; | |
966 | } | |
967 | if (preq->range_header != NULL) { | |
968 | curl_slist_free_all(preq->range_header); | |
969 | preq->range_header = NULL; | |
970 | } | |
971 | preq->slot = NULL; | |
972 | free(preq->url); | |
973 | } | |
974 | ||
975 | int finish_http_pack_request(struct http_pack_request *preq) | |
976 | { | |
977 | int ret; | |
978 | struct packed_git **lst; | |
979 | ||
980 | preq->target->pack_size = ftell(preq->packfile); | |
981 | ||
982 | if (preq->packfile != NULL) { | |
983 | fclose(preq->packfile); | |
984 | preq->packfile = NULL; | |
985 | preq->slot->local = NULL; | |
986 | } | |
987 | ||
988 | ret = move_temp_to_file(preq->tmpfile, preq->filename); | |
989 | if (ret) | |
990 | return ret; | |
991 | ||
992 | lst = preq->lst; | |
993 | while (*lst != preq->target) | |
994 | lst = &((*lst)->next); | |
995 | *lst = (*lst)->next; | |
996 | ||
997 | if (verify_pack(preq->target)) | |
998 | return -1; | |
999 | install_packed_git(preq->target); | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | struct http_pack_request *new_http_pack_request( | |
1005 | struct packed_git *target, const char *base_url) | |
1006 | { | |
1007 | char *url; | |
1008 | char *filename; | |
1009 | long prev_posn = 0; | |
1010 | char range[RANGE_HEADER_SIZE]; | |
1011 | struct strbuf buf = STRBUF_INIT; | |
1012 | struct http_pack_request *preq; | |
1013 | ||
1014 | preq = xmalloc(sizeof(*preq)); | |
1015 | preq->target = target; | |
1016 | preq->range_header = NULL; | |
1017 | ||
1018 | end_url_with_slash(&buf, base_url); | |
1019 | strbuf_addf(&buf, "objects/pack/pack-%s.pack", | |
1020 | sha1_to_hex(target->sha1)); | |
1021 | url = strbuf_detach(&buf, NULL); | |
1022 | preq->url = xstrdup(url); | |
1023 | ||
1024 | filename = sha1_pack_name(target->sha1); | |
1025 | snprintf(preq->filename, sizeof(preq->filename), "%s", filename); | |
1026 | snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp", filename); | |
1027 | preq->packfile = fopen(preq->tmpfile, "a"); | |
1028 | if (!preq->packfile) { | |
1029 | error("Unable to open local file %s for pack", | |
1030 | preq->tmpfile); | |
1031 | goto abort; | |
1032 | } | |
1033 | ||
1034 | preq->slot = get_active_slot(); | |
1035 | preq->slot->local = preq->packfile; | |
1036 | curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile); | |
1037 | curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite); | |
1038 | curl_easy_setopt(preq->slot->curl, CURLOPT_URL, url); | |
1039 | curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, | |
1040 | no_pragma_header); | |
1041 | ||
1042 | /* | |
1043 | * If there is data present from a previous transfer attempt, | |
1044 | * resume where it left off | |
1045 | */ | |
1046 | prev_posn = ftell(preq->packfile); | |
1047 | if (prev_posn>0) { | |
1048 | if (http_is_verbose) | |
1049 | fprintf(stderr, | |
1050 | "Resuming fetch of pack %s at byte %ld\n", | |
1051 | sha1_to_hex(target->sha1), prev_posn); | |
1052 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
1053 | preq->range_header = curl_slist_append(NULL, range); | |
1054 | curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER, | |
1055 | preq->range_header); | |
1056 | } | |
1057 | ||
1058 | return preq; | |
1059 | ||
1060 | abort: | |
1061 | free(filename); | |
1062 | return NULL; | |
1063 | } | |
5424bc55 TRC |
1064 | |
1065 | /* Helpers for fetching objects (loose) */ | |
1066 | static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, | |
1067 | void *data) | |
1068 | { | |
1069 | unsigned char expn[4096]; | |
1070 | size_t size = eltsize * nmemb; | |
1071 | int posn = 0; | |
1072 | struct http_object_request *freq = | |
1073 | (struct http_object_request *)data; | |
1074 | do { | |
1075 | ssize_t retval = xwrite(freq->localfile, | |
1076 | (char *) ptr + posn, size - posn); | |
1077 | if (retval < 0) | |
1078 | return posn; | |
1079 | posn += retval; | |
1080 | } while (posn < size); | |
1081 | ||
1082 | freq->stream.avail_in = size; | |
1083 | freq->stream.next_in = ptr; | |
1084 | do { | |
1085 | freq->stream.next_out = expn; | |
1086 | freq->stream.avail_out = sizeof(expn); | |
1087 | freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH); | |
1088 | git_SHA1_Update(&freq->c, expn, | |
1089 | sizeof(expn) - freq->stream.avail_out); | |
1090 | } while (freq->stream.avail_in && freq->zret == Z_OK); | |
1091 | data_received++; | |
1092 | return size; | |
1093 | } | |
1094 | ||
1095 | struct http_object_request *new_http_object_request(const char *base_url, | |
1096 | unsigned char *sha1) | |
1097 | { | |
1098 | char *hex = sha1_to_hex(sha1); | |
1099 | char *filename; | |
1100 | char prevfile[PATH_MAX]; | |
1101 | char *url; | |
1102 | int prevlocal; | |
1103 | unsigned char prev_buf[PREV_BUF_SIZE]; | |
1104 | ssize_t prev_read = 0; | |
1105 | long prev_posn = 0; | |
1106 | char range[RANGE_HEADER_SIZE]; | |
1107 | struct curl_slist *range_header = NULL; | |
1108 | struct http_object_request *freq; | |
1109 | ||
1110 | freq = xmalloc(sizeof(*freq)); | |
1111 | hashcpy(freq->sha1, sha1); | |
1112 | freq->localfile = -1; | |
1113 | ||
1114 | filename = sha1_file_name(sha1); | |
1115 | snprintf(freq->filename, sizeof(freq->filename), "%s", filename); | |
1116 | snprintf(freq->tmpfile, sizeof(freq->tmpfile), | |
1117 | "%s.temp", filename); | |
1118 | ||
1119 | snprintf(prevfile, sizeof(prevfile), "%s.prev", filename); | |
1120 | unlink_or_warn(prevfile); | |
1121 | rename(freq->tmpfile, prevfile); | |
1122 | unlink_or_warn(freq->tmpfile); | |
1123 | ||
1124 | if (freq->localfile != -1) | |
1125 | error("fd leakage in start: %d", freq->localfile); | |
1126 | freq->localfile = open(freq->tmpfile, | |
1127 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
1128 | /* | |
1129 | * This could have failed due to the "lazy directory creation"; | |
1130 | * try to mkdir the last path component. | |
1131 | */ | |
1132 | if (freq->localfile < 0 && errno == ENOENT) { | |
1133 | char *dir = strrchr(freq->tmpfile, '/'); | |
1134 | if (dir) { | |
1135 | *dir = 0; | |
1136 | mkdir(freq->tmpfile, 0777); | |
1137 | *dir = '/'; | |
1138 | } | |
1139 | freq->localfile = open(freq->tmpfile, | |
1140 | O_WRONLY | O_CREAT | O_EXCL, 0666); | |
1141 | } | |
1142 | ||
1143 | if (freq->localfile < 0) { | |
1144 | error("Couldn't create temporary file %s for %s: %s", | |
1145 | freq->tmpfile, freq->filename, strerror(errno)); | |
1146 | goto abort; | |
1147 | } | |
1148 | ||
1149 | memset(&freq->stream, 0, sizeof(freq->stream)); | |
1150 | ||
1151 | git_inflate_init(&freq->stream); | |
1152 | ||
1153 | git_SHA1_Init(&freq->c); | |
1154 | ||
1155 | url = get_remote_object_url(base_url, hex, 0); | |
1156 | freq->url = xstrdup(url); | |
1157 | ||
1158 | /* | |
1159 | * If a previous temp file is present, process what was already | |
1160 | * fetched. | |
1161 | */ | |
1162 | prevlocal = open(prevfile, O_RDONLY); | |
1163 | if (prevlocal != -1) { | |
1164 | do { | |
1165 | prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); | |
1166 | if (prev_read>0) { | |
1167 | if (fwrite_sha1_file(prev_buf, | |
1168 | 1, | |
1169 | prev_read, | |
1170 | freq) == prev_read) { | |
1171 | prev_posn += prev_read; | |
1172 | } else { | |
1173 | prev_read = -1; | |
1174 | } | |
1175 | } | |
1176 | } while (prev_read > 0); | |
1177 | close(prevlocal); | |
1178 | } | |
1179 | unlink_or_warn(prevfile); | |
1180 | ||
1181 | /* | |
1182 | * Reset inflate/SHA1 if there was an error reading the previous temp | |
1183 | * file; also rewind to the beginning of the local file. | |
1184 | */ | |
1185 | if (prev_read == -1) { | |
1186 | memset(&freq->stream, 0, sizeof(freq->stream)); | |
1187 | git_inflate_init(&freq->stream); | |
1188 | git_SHA1_Init(&freq->c); | |
1189 | if (prev_posn>0) { | |
1190 | prev_posn = 0; | |
1191 | lseek(freq->localfile, 0, SEEK_SET); | |
1192 | ftruncate(freq->localfile, 0); | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | freq->slot = get_active_slot(); | |
1197 | ||
1198 | curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq); | |
1199 | curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); | |
1200 | curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr); | |
1201 | curl_easy_setopt(freq->slot->curl, CURLOPT_URL, url); | |
1202 | curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); | |
1203 | ||
1204 | /* | |
1205 | * If we have successfully processed data from a previous fetch | |
1206 | * attempt, only fetch the data we don't already have. | |
1207 | */ | |
1208 | if (prev_posn>0) { | |
1209 | if (http_is_verbose) | |
1210 | fprintf(stderr, | |
1211 | "Resuming fetch of object %s at byte %ld\n", | |
1212 | hex, prev_posn); | |
1213 | sprintf(range, "Range: bytes=%ld-", prev_posn); | |
1214 | range_header = curl_slist_append(range_header, range); | |
1215 | curl_easy_setopt(freq->slot->curl, | |
1216 | CURLOPT_HTTPHEADER, range_header); | |
1217 | } | |
1218 | ||
1219 | return freq; | |
1220 | ||
1221 | free(url); | |
1222 | abort: | |
1223 | free(filename); | |
1224 | free(freq); | |
1225 | return NULL; | |
1226 | } | |
1227 | ||
1228 | void process_http_object_request(struct http_object_request *freq) | |
1229 | { | |
1230 | if (freq->slot == NULL) | |
1231 | return; | |
1232 | freq->curl_result = freq->slot->curl_result; | |
1233 | freq->http_code = freq->slot->http_code; | |
1234 | freq->slot = NULL; | |
1235 | } | |
1236 | ||
1237 | int finish_http_object_request(struct http_object_request *freq) | |
1238 | { | |
1239 | struct stat st; | |
1240 | ||
1241 | close(freq->localfile); | |
1242 | freq->localfile = -1; | |
1243 | ||
1244 | process_http_object_request(freq); | |
1245 | ||
1246 | if (freq->http_code == 416) { | |
1247 | fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); | |
1248 | } else if (freq->curl_result != CURLE_OK) { | |
1249 | if (stat(freq->tmpfile, &st) == 0) | |
1250 | if (st.st_size == 0) | |
1251 | unlink_or_warn(freq->tmpfile); | |
1252 | return -1; | |
1253 | } | |
1254 | ||
1255 | git_inflate_end(&freq->stream); | |
1256 | git_SHA1_Final(freq->real_sha1, &freq->c); | |
1257 | if (freq->zret != Z_STREAM_END) { | |
1258 | unlink_or_warn(freq->tmpfile); | |
1259 | return -1; | |
1260 | } | |
1261 | if (hashcmp(freq->sha1, freq->real_sha1)) { | |
1262 | unlink_or_warn(freq->tmpfile); | |
1263 | return -1; | |
1264 | } | |
1265 | freq->rename = | |
1266 | move_temp_to_file(freq->tmpfile, freq->filename); | |
1267 | ||
1268 | return freq->rename; | |
1269 | } | |
1270 | ||
1271 | void abort_http_object_request(struct http_object_request *freq) | |
1272 | { | |
1273 | unlink_or_warn(freq->tmpfile); | |
1274 | ||
1275 | release_http_object_request(freq); | |
1276 | } | |
1277 | ||
1278 | void release_http_object_request(struct http_object_request *freq) | |
1279 | { | |
1280 | if (freq->localfile != -1) { | |
1281 | close(freq->localfile); | |
1282 | freq->localfile = -1; | |
1283 | } | |
1284 | if (freq->url != NULL) { | |
1285 | free(freq->url); | |
1286 | freq->url = NULL; | |
1287 | } | |
1288 | freq->slot = NULL; | |
1289 | } |