Update draft release notes to 1.7.10
[git/git.git] / http.c
CommitLineData
29508e1e 1#include "http.h"
2264dfa5 2#include "pack.h"
de1a2fdd 3#include "sideband.h"
fe72d420 4#include "run-command.h"
f39f72d8 5#include "url.h"
148bb6a7 6#include "credential.h"
29508e1e 7
4251ccbd 8int active_requests;
e9176745 9int http_is_verbose;
de1a2fdd 10size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
29508e1e 11
b8ac9230
MS
12#if LIBCURL_VERSION_NUM >= 0x070a06
13#define LIBCURL_CAN_HANDLE_AUTH_ANY
14#endif
15
ad75ebe5
TRC
16static int min_curl_sessions = 1;
17static int curl_session_count;
29508e1e 18#ifdef USE_CURL_MULTI
cc3530e8
MH
19static int max_requests = -1;
20static CURLM *curlm;
29508e1e
NH
21#endif
22#ifndef NO_CURL_EASY_DUPHANDLE
cc3530e8 23static CURL *curl_default;
29508e1e 24#endif
5424bc55
TRC
25
26#define PREV_BUF_SIZE 4096
27#define RANGE_HEADER_SIZE 30
28
29508e1e
NH
29char curl_errorstr[CURL_ERROR_SIZE];
30
cc3530e8 31static int curl_ssl_verify = -1;
4251ccbd 32static const char *ssl_cert;
ef52aafa 33#if LIBCURL_VERSION_NUM >= 0x070903
4251ccbd 34static const char *ssl_key;
29508e1e
NH
35#endif
36#if LIBCURL_VERSION_NUM >= 0x070908
4251ccbd 37static const char *ssl_capath;
29508e1e 38#endif
4251ccbd 39static const char *ssl_cainfo;
cc3530e8
MH
40static long curl_low_speed_limit = -1;
41static long curl_low_speed_time = -1;
4251ccbd
JH
42static int curl_ftp_no_epsv;
43static const char *curl_http_proxy;
bcfb95dd 44static const char *curl_cookie_file;
148bb6a7 45static struct credential http_auth = CREDENTIAL_INIT;
a4ddbc33 46static int http_proactive_auth;
b1d1058c 47static const char *user_agent;
29508e1e 48
30dd9163
ML
49#if LIBCURL_VERSION_NUM >= 0x071700
50/* Use CURLOPT_KEYPASSWD as is */
51#elif LIBCURL_VERSION_NUM >= 0x070903
52#define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
53#else
54#define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
55#endif
56
148bb6a7 57static struct credential cert_auth = CREDENTIAL_INIT;
30dd9163
ML
58static int ssl_cert_password_required;
59
cc3530e8 60static struct curl_slist *pragma_header;
5424bc55 61static struct curl_slist *no_pragma_header;
e9176745 62
4251ccbd 63static struct active_request_slot *active_queue_head;
29508e1e 64
a04ff3ec 65size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
29508e1e
NH
66{
67 size_t size = eltsize * nmemb;
f444e528
JH
68 struct buffer *buffer = buffer_;
69
028c2976
MH
70 if (size > buffer->buf.len - buffer->posn)
71 size = buffer->buf.len - buffer->posn;
72 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
29508e1e 73 buffer->posn += size;
028c2976 74
29508e1e
NH
75 return size;
76}
77
3944ba0c
MS
78#ifndef NO_CURL_IOCTL
79curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
80{
81 struct buffer *buffer = clientp;
82
83 switch (cmd) {
84 case CURLIOCMD_NOP:
85 return CURLIOE_OK;
86
87 case CURLIOCMD_RESTARTREAD:
88 buffer->posn = 0;
89 return CURLIOE_OK;
90
91 default:
92 return CURLIOE_UNKNOWNCMD;
93 }
94}
95#endif
96
a04ff3ec 97size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
29508e1e
NH
98{
99 size_t size = eltsize * nmemb;
f444e528
JH
100 struct strbuf *buffer = buffer_;
101
028c2976 102 strbuf_add(buffer, ptr, size);
29508e1e
NH
103 return size;
104}
105
a04ff3ec 106size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
29508e1e 107{
29508e1e
NH
108 return eltsize * nmemb;
109}
110
29508e1e
NH
111#ifdef USE_CURL_MULTI
112static void process_curl_messages(void)
113{
114 int num_messages;
115 struct active_request_slot *slot;
116 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
117
118 while (curl_message != NULL) {
119 if (curl_message->msg == CURLMSG_DONE) {
120 int curl_result = curl_message->data.result;
121 slot = active_queue_head;
122 while (slot != NULL &&
123 slot->curl != curl_message->easy_handle)
124 slot = slot->next;
125 if (slot != NULL) {
126 curl_multi_remove_handle(curlm, slot->curl);
127 slot->curl_result = curl_result;
128 finish_active_slot(slot);
129 } else {
130 fprintf(stderr, "Received DONE message for unknown request!\n");
131 }
132 } else {
133 fprintf(stderr, "Unknown CURL message received: %d\n",
134 (int)curl_message->msg);
135 }
136 curl_message = curl_multi_info_read(curlm, &num_messages);
137 }
138}
139#endif
140
ef90d6d4 141static int http_options(const char *var, const char *value, void *cb)
29508e1e
NH
142{
143 if (!strcmp("http.sslverify", var)) {
7059cd99 144 curl_ssl_verify = git_config_bool(var, value);
29508e1e
NH
145 return 0;
146 }
7059cd99
JH
147 if (!strcmp("http.sslcert", var))
148 return git_config_string(&ssl_cert, var, value);
ef52aafa 149#if LIBCURL_VERSION_NUM >= 0x070903
7059cd99
JH
150 if (!strcmp("http.sslkey", var))
151 return git_config_string(&ssl_key, var, value);
29508e1e
NH
152#endif
153#if LIBCURL_VERSION_NUM >= 0x070908
7059cd99
JH
154 if (!strcmp("http.sslcapath", var))
155 return git_config_string(&ssl_capath, var, value);
29508e1e 156#endif
7059cd99
JH
157 if (!strcmp("http.sslcainfo", var))
158 return git_config_string(&ssl_cainfo, var, value);
754ae192
ML
159 if (!strcmp("http.sslcertpasswordprotected", var)) {
160 if (git_config_bool(var, value))
161 ssl_cert_password_required = 1;
162 return 0;
163 }
ad75ebe5
TRC
164 if (!strcmp("http.minsessions", var)) {
165 min_curl_sessions = git_config_int(var, value);
166#ifndef USE_CURL_MULTI
167 if (min_curl_sessions > 1)
168 min_curl_sessions = 1;
169#endif
170 return 0;
171 }
a6080a0a 172#ifdef USE_CURL_MULTI
29508e1e 173 if (!strcmp("http.maxrequests", var)) {
7059cd99 174 max_requests = git_config_int(var, value);
29508e1e
NH
175 return 0;
176 }
177#endif
29508e1e 178 if (!strcmp("http.lowspeedlimit", var)) {
7059cd99 179 curl_low_speed_limit = (long)git_config_int(var, value);
29508e1e
NH
180 return 0;
181 }
182 if (!strcmp("http.lowspeedtime", var)) {
7059cd99 183 curl_low_speed_time = (long)git_config_int(var, value);
29508e1e
NH
184 return 0;
185 }
186
3ea099d4
SK
187 if (!strcmp("http.noepsv", var)) {
188 curl_ftp_no_epsv = git_config_bool(var, value);
189 return 0;
190 }
7059cd99
JH
191 if (!strcmp("http.proxy", var))
192 return git_config_string(&curl_http_proxy, var, value);
3ea099d4 193
bcfb95dd
DB
194 if (!strcmp("http.cookiefile", var))
195 return git_config_string(&curl_cookie_file, var, value);
196
de1a2fdd
SP
197 if (!strcmp("http.postbuffer", var)) {
198 http_post_buffer = git_config_int(var, value);
199 if (http_post_buffer < LARGE_PACKET_MAX)
200 http_post_buffer = LARGE_PACKET_MAX;
201 return 0;
202 }
203
b1d1058c
SO
204 if (!strcmp("http.useragent", var))
205 return git_config_string(&user_agent, var, value);
206
29508e1e 207 /* Fall back on the default ones */
ef90d6d4 208 return git_default_config(var, value, cb);
29508e1e
NH
209}
210
c33976cb
JH
211static void init_curl_http_auth(CURL *result)
212{
148bb6a7 213 if (http_auth.username) {
c33976cb 214 struct strbuf up = STRBUF_INIT;
148bb6a7
JK
215 credential_fill(&http_auth);
216 strbuf_addf(&up, "%s:%s",
217 http_auth.username, http_auth.password);
c33976cb
JH
218 curl_easy_setopt(result, CURLOPT_USERPWD,
219 strbuf_detach(&up, NULL));
220 }
221}
222
30dd9163
ML
223static int has_cert_password(void)
224{
30dd9163
ML
225 if (ssl_cert == NULL || ssl_cert_password_required != 1)
226 return 0;
148bb6a7
JK
227 if (!cert_auth.password) {
228 cert_auth.protocol = xstrdup("cert");
229 cert_auth.path = xstrdup(ssl_cert);
230 credential_fill(&cert_auth);
231 }
232 return 1;
30dd9163
ML
233}
234
4251ccbd 235static CURL *get_curl_handle(void)
11979b98 236{
4251ccbd 237 CURL *result = curl_easy_init();
11979b98 238
a5ccc597
JH
239 if (!curl_ssl_verify) {
240 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
241 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
242 } else {
243 /* Verify authenticity of the peer's certificate */
244 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
245 /* The name in the cert must match whom we tried to connect */
246 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
247 }
248
11979b98
JH
249#if LIBCURL_VERSION_NUM >= 0x070907
250 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
251#endif
b8ac9230 252#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
525ecd26 253 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
b8ac9230 254#endif
11979b98 255
a4ddbc33
JK
256 if (http_proactive_auth)
257 init_curl_http_auth(result);
258
11979b98
JH
259 if (ssl_cert != NULL)
260 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
30dd9163 261 if (has_cert_password())
148bb6a7 262 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
ef52aafa 263#if LIBCURL_VERSION_NUM >= 0x070903
11979b98
JH
264 if (ssl_key != NULL)
265 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
266#endif
267#if LIBCURL_VERSION_NUM >= 0x070908
268 if (ssl_capath != NULL)
269 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
270#endif
271 if (ssl_cainfo != NULL)
272 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
273 curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
274
275 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
276 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
277 curl_low_speed_limit);
278 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
279 curl_low_speed_time);
280 }
281
282 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
311e2ea0
TRC
283#if LIBCURL_VERSION_NUM >= 0x071301
284 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
285#elif LIBCURL_VERSION_NUM >= 0x071101
286 curl_easy_setopt(result, CURLOPT_POST301, 1);
287#endif
11979b98 288
7982d74e
MW
289 if (getenv("GIT_CURL_VERBOSE"))
290 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
291
b1d1058c
SO
292 curl_easy_setopt(result, CURLOPT_USERAGENT,
293 user_agent ? user_agent : GIT_HTTP_USER_AGENT);
20fc9bc5 294
3ea099d4
SK
295 if (curl_ftp_no_epsv)
296 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
297
9c5665aa
SV
298 if (curl_http_proxy)
299 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
300
11979b98
JH
301 return result;
302}
303
7059cd99
JH
304static void set_from_env(const char **var, const char *envname)
305{
306 const char *val = getenv(envname);
307 if (val)
308 *var = val;
309}
310
a4ddbc33 311void http_init(struct remote *remote, const char *url, int proactive_auth)
29508e1e
NH
312{
313 char *low_speed_limit;
314 char *low_speed_time;
315
e9176745
TRC
316 http_is_verbose = 0;
317
7059cd99
JH
318 git_config(http_options, NULL);
319
29508e1e
NH
320 curl_global_init(CURL_GLOBAL_ALL);
321
a4ddbc33
JK
322 http_proactive_auth = proactive_auth;
323
9fc6440d
MH
324 if (remote && remote->http_proxy)
325 curl_http_proxy = xstrdup(remote->http_proxy);
326
29508e1e 327 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
e9176745 328 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
29508e1e
NH
329
330#ifdef USE_CURL_MULTI
331 {
332 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
333 if (http_max_requests != NULL)
334 max_requests = atoi(http_max_requests);
335 }
336
337 curlm = curl_multi_init();
338 if (curlm == NULL) {
339 fprintf(stderr, "Error creating curl multi handle.\n");
340 exit(1);
341 }
342#endif
343
344 if (getenv("GIT_SSL_NO_VERIFY"))
345 curl_ssl_verify = 0;
346
7059cd99 347 set_from_env(&ssl_cert, "GIT_SSL_CERT");
ef52aafa 348#if LIBCURL_VERSION_NUM >= 0x070903
7059cd99 349 set_from_env(&ssl_key, "GIT_SSL_KEY");
29508e1e
NH
350#endif
351#if LIBCURL_VERSION_NUM >= 0x070908
7059cd99 352 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
29508e1e 353#endif
7059cd99 354 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
29508e1e 355
b1d1058c
SO
356 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
357
29508e1e
NH
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
ad75ebe5 368 curl_session_count = 0;
29508e1e
NH
369#ifdef USE_CURL_MULTI
370 if (max_requests < 1)
371 max_requests = DEFAULT_MAX_REQUESTS;
372#endif
373
3ea099d4
SK
374 if (getenv("GIT_CURL_FTP_NO_EPSV"))
375 curl_ftp_no_epsv = 1;
376
deba4937 377 if (url) {
148bb6a7 378 credential_from_url(&http_auth, url);
754ae192
ML
379 if (!ssl_cert_password_required &&
380 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
deba4937 381 !prefixcmp(url, "https://"))
30dd9163
ML
382 ssl_cert_password_required = 1;
383 }
c33976cb 384
29508e1e
NH
385#ifndef NO_CURL_EASY_DUPHANDLE
386 curl_default = get_curl_handle();
387#endif
388}
389
390void http_cleanup(void)
391{
392 struct active_request_slot *slot = active_queue_head;
29508e1e
NH
393
394 while (slot != NULL) {
3278cd0a 395 struct active_request_slot *next = slot->next;
f23d1f76 396 if (slot->curl != NULL) {
29508e1e 397#ifdef USE_CURL_MULTI
f23d1f76 398 curl_multi_remove_handle(curlm, slot->curl);
29508e1e 399#endif
29508e1e 400 curl_easy_cleanup(slot->curl);
f23d1f76 401 }
3278cd0a
SP
402 free(slot);
403 slot = next;
29508e1e 404 }
3278cd0a 405 active_queue_head = NULL;
29508e1e
NH
406
407#ifndef NO_CURL_EASY_DUPHANDLE
408 curl_easy_cleanup(curl_default);
409#endif
410
411#ifdef USE_CURL_MULTI
412 curl_multi_cleanup(curlm);
413#endif
414 curl_global_cleanup();
b3ca4e4e
NH
415
416 curl_slist_free_all(pragma_header);
3278cd0a 417 pragma_header = NULL;
9fc6440d 418
e9176745
TRC
419 curl_slist_free_all(no_pragma_header);
420 no_pragma_header = NULL;
421
9fc6440d 422 if (curl_http_proxy) {
e4a80ecf 423 free((void *)curl_http_proxy);
9fc6440d
MH
424 curl_http_proxy = NULL;
425 }
30dd9163 426
148bb6a7
JK
427 if (cert_auth.password != NULL) {
428 memset(cert_auth.password, 0, strlen(cert_auth.password));
429 free(cert_auth.password);
430 cert_auth.password = NULL;
30dd9163
ML
431 }
432 ssl_cert_password_required = 0;
29508e1e
NH
433}
434
29508e1e
NH
435struct active_request_slot *get_active_slot(void)
436{
437 struct active_request_slot *slot = active_queue_head;
438 struct active_request_slot *newslot;
439
440#ifdef USE_CURL_MULTI
441 int num_transfers;
442
443 /* Wait for a slot to open up if the queue is full */
444 while (active_requests >= max_requests) {
445 curl_multi_perform(curlm, &num_transfers);
4251ccbd 446 if (num_transfers < active_requests)
29508e1e 447 process_curl_messages();
29508e1e
NH
448 }
449#endif
450
4251ccbd 451 while (slot != NULL && slot->in_use)
29508e1e 452 slot = slot->next;
4251ccbd 453
29508e1e
NH
454 if (slot == NULL) {
455 newslot = xmalloc(sizeof(*newslot));
456 newslot->curl = NULL;
457 newslot->in_use = 0;
458 newslot->next = NULL;
459
460 slot = active_queue_head;
461 if (slot == NULL) {
462 active_queue_head = newslot;
463 } else {
4251ccbd 464 while (slot->next != NULL)
29508e1e 465 slot = slot->next;
29508e1e
NH
466 slot->next = newslot;
467 }
468 slot = newslot;
469 }
470
471 if (slot->curl == NULL) {
472#ifdef NO_CURL_EASY_DUPHANDLE
473 slot->curl = get_curl_handle();
474#else
475 slot->curl = curl_easy_duphandle(curl_default);
476#endif
ad75ebe5 477 curl_session_count++;
29508e1e
NH
478 }
479
480 active_requests++;
481 slot->in_use = 1;
c8568e13 482 slot->results = NULL;
baa7b67d 483 slot->finished = NULL;
29508e1e
NH
484 slot->callback_data = NULL;
485 slot->callback_func = NULL;
bcfb95dd 486 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
29508e1e 487 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
29508e1e 488 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
9094950d
NH
489 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
490 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
491 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
1e41827d 492 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
9094950d
NH
493 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
494 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
29508e1e
NH
495
496 return slot;
497}
498
499int start_active_slot(struct active_request_slot *slot)
500{
501#ifdef USE_CURL_MULTI
502 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
45c17412 503 int num_transfers;
29508e1e
NH
504
505 if (curlm_result != CURLM_OK &&
506 curlm_result != CURLM_CALL_MULTI_PERFORM) {
507 active_requests--;
508 slot->in_use = 0;
509 return 0;
510 }
45c17412
DB
511
512 /*
513 * We know there must be something to do, since we just added
514 * something.
515 */
516 curl_multi_perform(curlm, &num_transfers);
29508e1e
NH
517#endif
518 return 1;
519}
520
521#ifdef USE_CURL_MULTI
fc57b6aa
DB
522struct fill_chain {
523 void *data;
524 int (*fill)(void *);
525 struct fill_chain *next;
526};
527
4251ccbd 528static struct fill_chain *fill_cfg;
fc57b6aa
DB
529
530void add_fill_function(void *data, int (*fill)(void *))
531{
e8eec71d 532 struct fill_chain *new = xmalloc(sizeof(*new));
fc57b6aa
DB
533 struct fill_chain **linkp = &fill_cfg;
534 new->data = data;
535 new->fill = fill;
536 new->next = NULL;
537 while (*linkp)
538 linkp = &(*linkp)->next;
539 *linkp = new;
540}
541
45c17412
DB
542void fill_active_slots(void)
543{
544 struct active_request_slot *slot = active_queue_head;
545
fc57b6aa
DB
546 while (active_requests < max_requests) {
547 struct fill_chain *fill;
548 for (fill = fill_cfg; fill; fill = fill->next)
549 if (fill->fill(fill->data))
550 break;
551
552 if (!fill)
45c17412 553 break;
fc57b6aa 554 }
45c17412
DB
555
556 while (slot != NULL) {
ad75ebe5
TRC
557 if (!slot->in_use && slot->curl != NULL
558 && curl_session_count > min_curl_sessions) {
45c17412
DB
559 curl_easy_cleanup(slot->curl);
560 slot->curl = NULL;
ad75ebe5 561 curl_session_count--;
45c17412
DB
562 }
563 slot = slot->next;
564 }
565}
566
29508e1e
NH
567void step_active_slots(void)
568{
569 int num_transfers;
570 CURLMcode curlm_result;
571
572 do {
573 curlm_result = curl_multi_perform(curlm, &num_transfers);
574 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
575 if (num_transfers < active_requests) {
576 process_curl_messages();
577 fill_active_slots();
578 }
579}
580#endif
581
582void run_active_slot(struct active_request_slot *slot)
583{
584#ifdef USE_CURL_MULTI
29508e1e
NH
585 fd_set readfds;
586 fd_set writefds;
587 fd_set excfds;
588 int max_fd;
589 struct timeval select_timeout;
baa7b67d 590 int finished = 0;
29508e1e 591
baa7b67d
NH
592 slot->finished = &finished;
593 while (!finished) {
29508e1e
NH
594 step_active_slots();
595
df26c471 596 if (slot->in_use) {
eb56c821
MF
597#if LIBCURL_VERSION_NUM >= 0x070f04
598 long curl_timeout;
599 curl_multi_timeout(curlm, &curl_timeout);
600 if (curl_timeout == 0) {
601 continue;
602 } else if (curl_timeout == -1) {
603 select_timeout.tv_sec = 0;
604 select_timeout.tv_usec = 50000;
605 } else {
606 select_timeout.tv_sec = curl_timeout / 1000;
607 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
608 }
609#else
610 select_timeout.tv_sec = 0;
611 select_timeout.tv_usec = 50000;
612#endif
29508e1e 613
6f9dd67f 614 max_fd = -1;
29508e1e
NH
615 FD_ZERO(&readfds);
616 FD_ZERO(&writefds);
617 FD_ZERO(&excfds);
6f9dd67f 618 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
eb56c821 619
6f9dd67f 620 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
29508e1e
NH
621 }
622 }
623#else
624 while (slot->in_use) {
625 slot->curl_result = curl_easy_perform(slot->curl);
626 finish_active_slot(slot);
627 }
628#endif
629}
630
53f31389 631static void closedown_active_slot(struct active_request_slot *slot)
29508e1e 632{
028c2976
MH
633 active_requests--;
634 slot->in_use = 0;
53f31389
MW
635}
636
83e41e2e 637static void release_active_slot(struct active_request_slot *slot)
53f31389
MW
638{
639 closedown_active_slot(slot);
ad75ebe5 640 if (slot->curl && curl_session_count > min_curl_sessions) {
b3ca4e4e 641#ifdef USE_CURL_MULTI
53f31389 642 curl_multi_remove_handle(curlm, slot->curl);
b3ca4e4e 643#endif
53f31389
MW
644 curl_easy_cleanup(slot->curl);
645 slot->curl = NULL;
ad75ebe5 646 curl_session_count--;
53f31389 647 }
b3ca4e4e 648#ifdef USE_CURL_MULTI
53f31389 649 fill_active_slots();
b3ca4e4e 650#endif
53f31389
MW
651}
652
de1a2fdd 653void finish_active_slot(struct active_request_slot *slot)
53f31389
MW
654{
655 closedown_active_slot(slot);
028c2976 656 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
c8568e13 657
baa7b67d
NH
658 if (slot->finished != NULL)
659 (*slot->finished) = 1;
660
c8568e13
NH
661 /* Store slot results so they can be read after the slot is reused */
662 if (slot->results != NULL) {
663 slot->results->curl_result = slot->curl_result;
664 slot->results->http_code = slot->http_code;
665 }
666
028c2976 667 /* Run callback if appropriate */
4251ccbd 668 if (slot->callback_func != NULL)
028c2976 669 slot->callback_func(slot->callback_data);
29508e1e
NH
670}
671
672void finish_all_active_slots(void)
673{
674 struct active_request_slot *slot = active_queue_head;
675
676 while (slot != NULL)
677 if (slot->in_use) {
678 run_active_slot(slot);
679 slot = active_queue_head;
680 } else {
681 slot = slot->next;
682 }
683}
d7e92806 684
5ace994f 685/* Helpers for modifying and creating URLs */
d7e92806
MH
686static inline int needs_quote(int ch)
687{
688 if (((ch >= 'A') && (ch <= 'Z'))
689 || ((ch >= 'a') && (ch <= 'z'))
690 || ((ch >= '0') && (ch <= '9'))
691 || (ch == '/')
692 || (ch == '-')
693 || (ch == '.'))
694 return 0;
695 return 1;
696}
697
d7e92806
MH
698static char *quote_ref_url(const char *base, const char *ref)
699{
113106e0 700 struct strbuf buf = STRBUF_INIT;
d7e92806 701 const char *cp;
113106e0 702 int ch;
d7e92806 703
5ace994f 704 end_url_with_slash(&buf, base);
113106e0
TRC
705
706 for (cp = ref; (ch = *cp) != 0; cp++)
d7e92806 707 if (needs_quote(ch))
113106e0 708 strbuf_addf(&buf, "%%%02x", ch);
d7e92806 709 else
113106e0 710 strbuf_addch(&buf, *cp);
d7e92806 711
113106e0 712 return strbuf_detach(&buf, NULL);
d7e92806
MH
713}
714
5424bc55
TRC
715void append_remote_object_url(struct strbuf *buf, const char *url,
716 const char *hex,
717 int only_two_digit_prefix)
718{
800324c3
TRC
719 end_url_with_slash(buf, url);
720
721 strbuf_addf(buf, "objects/%.*s/", 2, hex);
5424bc55
TRC
722 if (!only_two_digit_prefix)
723 strbuf_addf(buf, "%s", hex+2);
724}
725
726char *get_remote_object_url(const char *url, const char *hex,
727 int only_two_digit_prefix)
728{
729 struct strbuf buf = STRBUF_INIT;
730 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
731 return strbuf_detach(&buf, NULL);
732}
733
e929cd20
MH
734/* http_request() targets */
735#define HTTP_REQUEST_STRBUF 0
736#define HTTP_REQUEST_FILE 1
737
738static int http_request(const char *url, void *result, int target, int options)
739{
740 struct active_request_slot *slot;
741 struct slot_results results;
742 struct curl_slist *headers = NULL;
743 struct strbuf buf = STRBUF_INIT;
744 int ret;
745
746 slot = get_active_slot();
747 slot->results = &results;
748 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
749
750 if (result == NULL) {
751 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
752 } else {
753 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
754 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
755
756 if (target == HTTP_REQUEST_FILE) {
757 long posn = ftell(result);
758 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
759 fwrite);
760 if (posn > 0) {
761 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
762 headers = curl_slist_append(headers, buf.buf);
763 strbuf_reset(&buf);
764 }
e929cd20
MH
765 } else
766 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
767 fwrite_buffer);
768 }
769
770 strbuf_addstr(&buf, "Pragma:");
771 if (options & HTTP_NO_CACHE)
772 strbuf_addstr(&buf, " no-cache");
773
774 headers = curl_slist_append(headers, buf.buf);
775
776 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
777 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
778
779 if (start_active_slot(slot)) {
780 run_active_slot(slot);
781 if (results.curl_result == CURLE_OK)
782 ret = HTTP_OK;
783 else if (missing_target(&results))
784 ret = HTTP_MISSING_TARGET;
42653c09 785 else if (results.http_code == 401) {
148bb6a7
JK
786 if (http_auth.username && http_auth.password) {
787 credential_reject(&http_auth);
42653c09
SC
788 ret = HTTP_NOAUTH;
789 } else {
148bb6a7 790 credential_fill(&http_auth);
42653c09
SC
791 init_curl_http_auth(slot->curl);
792 ret = HTTP_REAUTH;
793 }
be22d92e
JN
794 } else {
795 if (!curl_errorstr[0])
796 strlcpy(curl_errorstr,
797 curl_easy_strerror(results.curl_result),
798 sizeof(curl_errorstr));
e929cd20 799 ret = HTTP_ERROR;
be22d92e 800 }
e929cd20
MH
801 } else {
802 error("Unable to start HTTP request for %s", url);
803 ret = HTTP_START_FAILED;
804 }
805
e929cd20
MH
806 curl_slist_free_all(headers);
807 strbuf_release(&buf);
808
148bb6a7
JK
809 if (ret == HTTP_OK)
810 credential_approve(&http_auth);
811
e929cd20
MH
812 return ret;
813}
814
8d677edc
JK
815static int http_request_reauth(const char *url, void *result, int target,
816 int options)
817{
818 int ret = http_request(url, result, target, options);
819 if (ret != HTTP_REAUTH)
820 return ret;
821 return http_request(url, result, target, options);
822}
823
e929cd20
MH
824int http_get_strbuf(const char *url, struct strbuf *result, int options)
825{
8d677edc 826 return http_request_reauth(url, result, HTTP_REQUEST_STRBUF, options);
e929cd20
MH
827}
828
83e41e2e
JH
829/*
830 * Downloads an url and stores the result in the given file.
831 *
832 * If a previous interrupted download is detected (i.e. a previous temporary
833 * file is still around) the download is resumed.
834 */
835static int http_get_file(const char *url, const char *filename, int options)
e929cd20
MH
836{
837 int ret;
838 struct strbuf tmpfile = STRBUF_INIT;
839 FILE *result;
840
841 strbuf_addf(&tmpfile, "%s.temp", filename);
842 result = fopen(tmpfile.buf, "a");
843 if (! result) {
844 error("Unable to open local file %s", tmpfile.buf);
845 ret = HTTP_ERROR;
846 goto cleanup;
847 }
848
8d677edc 849 ret = http_request_reauth(url, result, HTTP_REQUEST_FILE, options);
e929cd20
MH
850 fclose(result);
851
852 if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
853 ret = HTTP_ERROR;
854cleanup:
855 strbuf_release(&tmpfile);
856 return ret;
857}
858
859int http_error(const char *url, int ret)
860{
861 /* http_request has already handled HTTP_START_FAILED. */
862 if (ret != HTTP_START_FAILED)
8abc5082 863 error("%s while accessing %s", curl_errorstr, url);
e929cd20
MH
864
865 return ret;
866}
867
c13b2633 868int http_fetch_ref(const char *base, struct ref *ref)
d7e92806
MH
869{
870 char *url;
871 struct strbuf buffer = STRBUF_INIT;
0d5896e1 872 int ret = -1;
d7e92806 873
c13b2633 874 url = quote_ref_url(base, ref->name);
0d5896e1
MH
875 if (http_get_strbuf(url, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
876 strbuf_rtrim(&buffer);
877 if (buffer.len == 40)
878 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
879 else if (!prefixcmp(buffer.buf, "ref: ")) {
880 ref->symref = xstrdup(buffer.buf + 5);
881 ret = 0;
d7e92806 882 }
d7e92806
MH
883 }
884
885 strbuf_release(&buffer);
886 free(url);
887 return ret;
888}
b8caac2b
TRC
889
890/* Helpers for fetching packs */
750ef425 891static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
b8caac2b 892{
750ef425 893 char *url, *tmp;
b8caac2b 894 struct strbuf buf = STRBUF_INIT;
b8caac2b 895
b8caac2b 896 if (http_is_verbose)
162eb5f8 897 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
b8caac2b
TRC
898
899 end_url_with_slash(&buf, base_url);
162eb5f8 900 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
b8caac2b
TRC
901 url = strbuf_detach(&buf, NULL);
902
750ef425
SP
903 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
904 tmp = strbuf_detach(&buf, NULL);
905
906 if (http_get_file(url, tmp, 0) != HTTP_OK) {
907 error("Unable to get pack index %s\n", url);
908 free(tmp);
909 tmp = NULL;
910 }
b8caac2b 911
b8caac2b 912 free(url);
750ef425 913 return tmp;
b8caac2b
TRC
914}
915
916static int fetch_and_setup_pack_index(struct packed_git **packs_head,
917 unsigned char *sha1, const char *base_url)
918{
919 struct packed_git *new_pack;
750ef425
SP
920 char *tmp_idx = NULL;
921 int ret;
b8caac2b 922
750ef425
SP
923 if (has_pack_index(sha1)) {
924 new_pack = parse_pack_index(sha1, NULL);
925 if (!new_pack)
926 return -1; /* parse_pack_index() already issued error message */
927 goto add_pack;
928 }
929
930 tmp_idx = fetch_pack_index(sha1, base_url);
931 if (!tmp_idx)
b8caac2b
TRC
932 return -1;
933
750ef425
SP
934 new_pack = parse_pack_index(sha1, tmp_idx);
935 if (!new_pack) {
936 unlink(tmp_idx);
937 free(tmp_idx);
938
b8caac2b 939 return -1; /* parse_pack_index() already issued error message */
750ef425
SP
940 }
941
942 ret = verify_pack_index(new_pack);
943 if (!ret) {
944 close_pack_index(new_pack);
945 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
946 }
947 free(tmp_idx);
948 if (ret)
949 return -1;
950
951add_pack:
b8caac2b
TRC
952 new_pack->next = *packs_head;
953 *packs_head = new_pack;
954 return 0;
955}
956
957int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
958{
959 int ret = 0, i = 0;
960 char *url, *data;
961 struct strbuf buf = STRBUF_INIT;
962 unsigned char sha1[20];
963
964 end_url_with_slash(&buf, base_url);
965 strbuf_addstr(&buf, "objects/info/packs");
966 url = strbuf_detach(&buf, NULL);
967
968 ret = http_get_strbuf(url, &buf, HTTP_NO_CACHE);
969 if (ret != HTTP_OK)
970 goto cleanup;
971
972 data = buf.buf;
973 while (i < buf.len) {
974 switch (data[i]) {
975 case 'P':
976 i++;
977 if (i + 52 <= buf.len &&
978 !prefixcmp(data + i, " pack-") &&
979 !prefixcmp(data + i + 46, ".pack\n")) {
980 get_sha1_hex(data + i + 6, sha1);
981 fetch_and_setup_pack_index(packs_head, sha1,
982 base_url);
983 i += 51;
984 break;
985 }
986 default:
987 while (i < buf.len && data[i] != '\n')
988 i++;
989 }
990 i++;
991 }
992
993cleanup:
994 free(url);
995 return ret;
996}
2264dfa5
TRC
997
998void release_http_pack_request(struct http_pack_request *preq)
999{
1000 if (preq->packfile != NULL) {
1001 fclose(preq->packfile);
1002 preq->packfile = NULL;
2264dfa5
TRC
1003 }
1004 if (preq->range_header != NULL) {
1005 curl_slist_free_all(preq->range_header);
1006 preq->range_header = NULL;
1007 }
1008 preq->slot = NULL;
1009 free(preq->url);
1010}
1011
1012int finish_http_pack_request(struct http_pack_request *preq)
1013{
2264dfa5 1014 struct packed_git **lst;
021ab6f0 1015 struct packed_git *p = preq->target;
fe72d420
SP
1016 char *tmp_idx;
1017 struct child_process ip;
1018 const char *ip_argv[8];
2264dfa5 1019
fe72d420 1020 close_pack_index(p);
2264dfa5 1021
3065274c
SP
1022 fclose(preq->packfile);
1023 preq->packfile = NULL;
2264dfa5
TRC
1024
1025 lst = preq->lst;
021ab6f0 1026 while (*lst != p)
2264dfa5
TRC
1027 lst = &((*lst)->next);
1028 *lst = (*lst)->next;
1029
fe72d420
SP
1030 tmp_idx = xstrdup(preq->tmpfile);
1031 strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1032 ".idx.temp");
1033
1034 ip_argv[0] = "index-pack";
1035 ip_argv[1] = "-o";
1036 ip_argv[2] = tmp_idx;
1037 ip_argv[3] = preq->tmpfile;
1038 ip_argv[4] = NULL;
1039
1040 memset(&ip, 0, sizeof(ip));
1041 ip.argv = ip_argv;
1042 ip.git_cmd = 1;
1043 ip.no_stdin = 1;
1044 ip.no_stdout = 1;
1045
1046 if (run_command(&ip)) {
1047 unlink(preq->tmpfile);
1048 unlink(tmp_idx);
1049 free(tmp_idx);
2264dfa5 1050 return -1;
fe72d420
SP
1051 }
1052
1053 unlink(sha1_pack_index_name(p->sha1));
2264dfa5 1054
fe72d420
SP
1055 if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1056 || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1057 free(tmp_idx);
2264dfa5 1058 return -1;
fe72d420 1059 }
2264dfa5 1060
fe72d420
SP
1061 install_packed_git(p);
1062 free(tmp_idx);
2264dfa5
TRC
1063 return 0;
1064}
1065
1066struct http_pack_request *new_http_pack_request(
1067 struct packed_git *target, const char *base_url)
1068{
2264dfa5
TRC
1069 long prev_posn = 0;
1070 char range[RANGE_HEADER_SIZE];
1071 struct strbuf buf = STRBUF_INIT;
1072 struct http_pack_request *preq;
1073
ec99c9a8 1074 preq = xcalloc(1, sizeof(*preq));
2264dfa5 1075 preq->target = target;
2264dfa5
TRC
1076
1077 end_url_with_slash(&buf, base_url);
1078 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1079 sha1_to_hex(target->sha1));
bb99190e 1080 preq->url = strbuf_detach(&buf, NULL);
2264dfa5 1081
90d05713
TRC
1082 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1083 sha1_pack_name(target->sha1));
2264dfa5
TRC
1084 preq->packfile = fopen(preq->tmpfile, "a");
1085 if (!preq->packfile) {
1086 error("Unable to open local file %s for pack",
1087 preq->tmpfile);
1088 goto abort;
1089 }
1090
1091 preq->slot = get_active_slot();
2264dfa5
TRC
1092 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1093 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
bb99190e 1094 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
2264dfa5
TRC
1095 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1096 no_pragma_header);
1097
1098 /*
1099 * If there is data present from a previous transfer attempt,
1100 * resume where it left off
1101 */
1102 prev_posn = ftell(preq->packfile);
1103 if (prev_posn>0) {
1104 if (http_is_verbose)
1105 fprintf(stderr,
1106 "Resuming fetch of pack %s at byte %ld\n",
1107 sha1_to_hex(target->sha1), prev_posn);
1108 sprintf(range, "Range: bytes=%ld-", prev_posn);
1109 preq->range_header = curl_slist_append(NULL, range);
1110 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1111 preq->range_header);
1112 }
1113
1114 return preq;
1115
1116abort:
bb99190e 1117 free(preq->url);
5ae9ebfd 1118 free(preq);
2264dfa5
TRC
1119 return NULL;
1120}
5424bc55
TRC
1121
1122/* Helpers for fetching objects (loose) */
a04ff3ec 1123static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
5424bc55
TRC
1124 void *data)
1125{
1126 unsigned char expn[4096];
1127 size_t size = eltsize * nmemb;
1128 int posn = 0;
1129 struct http_object_request *freq =
1130 (struct http_object_request *)data;
1131 do {
1132 ssize_t retval = xwrite(freq->localfile,
1133 (char *) ptr + posn, size - posn);
1134 if (retval < 0)
1135 return posn;
1136 posn += retval;
1137 } while (posn < size);
1138
1139 freq->stream.avail_in = size;
a04ff3ec 1140 freq->stream.next_in = (void *)ptr;
5424bc55
TRC
1141 do {
1142 freq->stream.next_out = expn;
1143 freq->stream.avail_out = sizeof(expn);
1144 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1145 git_SHA1_Update(&freq->c, expn,
1146 sizeof(expn) - freq->stream.avail_out);
1147 } while (freq->stream.avail_in && freq->zret == Z_OK);
5424bc55
TRC
1148 return size;
1149}
1150
1151struct http_object_request *new_http_object_request(const char *base_url,
1152 unsigned char *sha1)
1153{
1154 char *hex = sha1_to_hex(sha1);
1155 char *filename;
1156 char prevfile[PATH_MAX];
5424bc55 1157 int prevlocal;
a04ff3ec 1158 char prev_buf[PREV_BUF_SIZE];
5424bc55
TRC
1159 ssize_t prev_read = 0;
1160 long prev_posn = 0;
1161 char range[RANGE_HEADER_SIZE];
1162 struct curl_slist *range_header = NULL;
1163 struct http_object_request *freq;
1164
ec99c9a8 1165 freq = xcalloc(1, sizeof(*freq));
5424bc55
TRC
1166 hashcpy(freq->sha1, sha1);
1167 freq->localfile = -1;
1168
1169 filename = sha1_file_name(sha1);
5424bc55
TRC
1170 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1171 "%s.temp", filename);
1172
1173 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1174 unlink_or_warn(prevfile);
1175 rename(freq->tmpfile, prevfile);
1176 unlink_or_warn(freq->tmpfile);
1177
1178 if (freq->localfile != -1)
1179 error("fd leakage in start: %d", freq->localfile);
1180 freq->localfile = open(freq->tmpfile,
1181 O_WRONLY | O_CREAT | O_EXCL, 0666);
1182 /*
1183 * This could have failed due to the "lazy directory creation";
1184 * try to mkdir the last path component.
1185 */
1186 if (freq->localfile < 0 && errno == ENOENT) {
1187 char *dir = strrchr(freq->tmpfile, '/');
1188 if (dir) {
1189 *dir = 0;
1190 mkdir(freq->tmpfile, 0777);
1191 *dir = '/';
1192 }
1193 freq->localfile = open(freq->tmpfile,
1194 O_WRONLY | O_CREAT | O_EXCL, 0666);
1195 }
1196
1197 if (freq->localfile < 0) {
0da8b2e7
SP
1198 error("Couldn't create temporary file %s: %s",
1199 freq->tmpfile, strerror(errno));
5424bc55
TRC
1200 goto abort;
1201 }
1202
5424bc55
TRC
1203 git_inflate_init(&freq->stream);
1204
1205 git_SHA1_Init(&freq->c);
1206
bb99190e 1207 freq->url = get_remote_object_url(base_url, hex, 0);
5424bc55
TRC
1208
1209 /*
1210 * If a previous temp file is present, process what was already
1211 * fetched.
1212 */
1213 prevlocal = open(prevfile, O_RDONLY);
1214 if (prevlocal != -1) {
1215 do {
1216 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1217 if (prev_read>0) {
1218 if (fwrite_sha1_file(prev_buf,
1219 1,
1220 prev_read,
1221 freq) == prev_read) {
1222 prev_posn += prev_read;
1223 } else {
1224 prev_read = -1;
1225 }
1226 }
1227 } while (prev_read > 0);
1228 close(prevlocal);
1229 }
1230 unlink_or_warn(prevfile);
1231
1232 /*
1233 * Reset inflate/SHA1 if there was an error reading the previous temp
1234 * file; also rewind to the beginning of the local file.
1235 */
1236 if (prev_read == -1) {
1237 memset(&freq->stream, 0, sizeof(freq->stream));
1238 git_inflate_init(&freq->stream);
1239 git_SHA1_Init(&freq->c);
1240 if (prev_posn>0) {
1241 prev_posn = 0;
1242 lseek(freq->localfile, 0, SEEK_SET);
0c4f21e4 1243 if (ftruncate(freq->localfile, 0) < 0) {
0da8b2e7
SP
1244 error("Couldn't truncate temporary file %s: %s",
1245 freq->tmpfile, strerror(errno));
0c4f21e4
JL
1246 goto abort;
1247 }
5424bc55
TRC
1248 }
1249 }
1250
1251 freq->slot = get_active_slot();
1252
1253 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1254 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1255 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
bb99190e 1256 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
5424bc55
TRC
1257 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1258
1259 /*
1260 * If we have successfully processed data from a previous fetch
1261 * attempt, only fetch the data we don't already have.
1262 */
1263 if (prev_posn>0) {
1264 if (http_is_verbose)
1265 fprintf(stderr,
1266 "Resuming fetch of object %s at byte %ld\n",
1267 hex, prev_posn);
1268 sprintf(range, "Range: bytes=%ld-", prev_posn);
1269 range_header = curl_slist_append(range_header, range);
1270 curl_easy_setopt(freq->slot->curl,
1271 CURLOPT_HTTPHEADER, range_header);
1272 }
1273
1274 return freq;
1275
5424bc55 1276abort:
bb99190e 1277 free(freq->url);
5424bc55
TRC
1278 free(freq);
1279 return NULL;
1280}
1281
1282void process_http_object_request(struct http_object_request *freq)
1283{
1284 if (freq->slot == NULL)
1285 return;
1286 freq->curl_result = freq->slot->curl_result;
1287 freq->http_code = freq->slot->http_code;
1288 freq->slot = NULL;
1289}
1290
1291int finish_http_object_request(struct http_object_request *freq)
1292{
1293 struct stat st;
1294
1295 close(freq->localfile);
1296 freq->localfile = -1;
1297
1298 process_http_object_request(freq);
1299
1300 if (freq->http_code == 416) {
bd757c18 1301 warning("requested range invalid; we may already have all the data.");
5424bc55
TRC
1302 } else if (freq->curl_result != CURLE_OK) {
1303 if (stat(freq->tmpfile, &st) == 0)
1304 if (st.st_size == 0)
1305 unlink_or_warn(freq->tmpfile);
1306 return -1;
1307 }
1308
1309 git_inflate_end(&freq->stream);
1310 git_SHA1_Final(freq->real_sha1, &freq->c);
1311 if (freq->zret != Z_STREAM_END) {
1312 unlink_or_warn(freq->tmpfile);
1313 return -1;
1314 }
1315 if (hashcmp(freq->sha1, freq->real_sha1)) {
1316 unlink_or_warn(freq->tmpfile);
1317 return -1;
1318 }
1319 freq->rename =
0da8b2e7 1320 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
5424bc55
TRC
1321
1322 return freq->rename;
1323}
1324
1325void abort_http_object_request(struct http_object_request *freq)
1326{
1327 unlink_or_warn(freq->tmpfile);
1328
1329 release_http_object_request(freq);
1330}
1331
1332void release_http_object_request(struct http_object_request *freq)
1333{
1334 if (freq->localfile != -1) {
1335 close(freq->localfile);
1336 freq->localfile = -1;
1337 }
1338 if (freq->url != NULL) {
1339 free(freq->url);
1340 freq->url = NULL;
1341 }
4b9fa0e3
TRC
1342 if (freq->slot != NULL) {
1343 freq->slot->callback_func = NULL;
1344 freq->slot->callback_data = NULL;
1345 release_active_slot(freq->slot);
1346 freq->slot = NULL;
1347 }
5424bc55 1348}