Merge branch 'jl/submodule-mv'
[git] / http.c
1 #include "http.h"
2 #include "pack.h"
3 #include "sideband.h"
4 #include "run-command.h"
5 #include "url.h"
6 #include "credential.h"
7 #include "version.h"
8 #include "pkt-line.h"
9
10 int active_requests;
11 int http_is_verbose;
12 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
13
14 #if LIBCURL_VERSION_NUM >= 0x070a06
15 #define LIBCURL_CAN_HANDLE_AUTH_ANY
16 #endif
17
18 static int min_curl_sessions = 1;
19 static int curl_session_count;
20 #ifdef USE_CURL_MULTI
21 static int max_requests = -1;
22 static CURLM *curlm;
23 #endif
24 #ifndef NO_CURL_EASY_DUPHANDLE
25 static CURL *curl_default;
26 #endif
27
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
30
31 char curl_errorstr[CURL_ERROR_SIZE];
32
33 static int curl_ssl_verify = -1;
34 static int curl_ssl_try;
35 static const char *ssl_cert;
36 #if LIBCURL_VERSION_NUM >= 0x070903
37 static const char *ssl_key;
38 #endif
39 #if LIBCURL_VERSION_NUM >= 0x070908
40 static const char *ssl_capath;
41 #endif
42 static const char *ssl_cainfo;
43 static long curl_low_speed_limit = -1;
44 static long curl_low_speed_time = -1;
45 static int curl_ftp_no_epsv;
46 static const char *curl_http_proxy;
47 static const char *curl_cookie_file;
48 static int curl_save_cookies;
49 static struct credential http_auth = CREDENTIAL_INIT;
50 static int http_proactive_auth;
51 static const char *user_agent;
52
53 #if LIBCURL_VERSION_NUM >= 0x071700
54 /* Use CURLOPT_KEYPASSWD as is */
55 #elif LIBCURL_VERSION_NUM >= 0x070903
56 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
57 #else
58 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
59 #endif
60
61 static struct credential cert_auth = CREDENTIAL_INIT;
62 static int ssl_cert_password_required;
63
64 static struct curl_slist *pragma_header;
65 static struct curl_slist *no_pragma_header;
66
67 static struct active_request_slot *active_queue_head;
68
69 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
70 {
71         size_t size = eltsize * nmemb;
72         struct buffer *buffer = buffer_;
73
74         if (size > buffer->buf.len - buffer->posn)
75                 size = buffer->buf.len - buffer->posn;
76         memcpy(ptr, buffer->buf.buf + buffer->posn, size);
77         buffer->posn += size;
78
79         return size;
80 }
81
82 #ifndef NO_CURL_IOCTL
83 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
84 {
85         struct buffer *buffer = clientp;
86
87         switch (cmd) {
88         case CURLIOCMD_NOP:
89                 return CURLIOE_OK;
90
91         case CURLIOCMD_RESTARTREAD:
92                 buffer->posn = 0;
93                 return CURLIOE_OK;
94
95         default:
96                 return CURLIOE_UNKNOWNCMD;
97         }
98 }
99 #endif
100
101 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
102 {
103         size_t size = eltsize * nmemb;
104         struct strbuf *buffer = buffer_;
105
106         strbuf_add(buffer, ptr, size);
107         return size;
108 }
109
110 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
111 {
112         return eltsize * nmemb;
113 }
114
115 #ifdef USE_CURL_MULTI
116 static void process_curl_messages(void)
117 {
118         int num_messages;
119         struct active_request_slot *slot;
120         CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
121
122         while (curl_message != NULL) {
123                 if (curl_message->msg == CURLMSG_DONE) {
124                         int curl_result = curl_message->data.result;
125                         slot = active_queue_head;
126                         while (slot != NULL &&
127                                slot->curl != curl_message->easy_handle)
128                                 slot = slot->next;
129                         if (slot != NULL) {
130                                 curl_multi_remove_handle(curlm, slot->curl);
131                                 slot->curl_result = curl_result;
132                                 finish_active_slot(slot);
133                         } else {
134                                 fprintf(stderr, "Received DONE message for unknown request!\n");
135                         }
136                 } else {
137                         fprintf(stderr, "Unknown CURL message received: %d\n",
138                                 (int)curl_message->msg);
139                 }
140                 curl_message = curl_multi_info_read(curlm, &num_messages);
141         }
142 }
143 #endif
144
145 static int http_options(const char *var, const char *value, void *cb)
146 {
147         if (!strcmp("http.sslverify", var)) {
148                 curl_ssl_verify = git_config_bool(var, value);
149                 return 0;
150         }
151         if (!strcmp("http.sslcert", var))
152                 return git_config_string(&ssl_cert, var, value);
153 #if LIBCURL_VERSION_NUM >= 0x070903
154         if (!strcmp("http.sslkey", var))
155                 return git_config_string(&ssl_key, var, value);
156 #endif
157 #if LIBCURL_VERSION_NUM >= 0x070908
158         if (!strcmp("http.sslcapath", var))
159                 return git_config_string(&ssl_capath, var, value);
160 #endif
161         if (!strcmp("http.sslcainfo", var))
162                 return git_config_string(&ssl_cainfo, var, value);
163         if (!strcmp("http.sslcertpasswordprotected", var)) {
164                 if (git_config_bool(var, value))
165                         ssl_cert_password_required = 1;
166                 return 0;
167         }
168         if (!strcmp("http.ssltry", var)) {
169                 curl_ssl_try = git_config_bool(var, value);
170                 return 0;
171         }
172         if (!strcmp("http.minsessions", var)) {
173                 min_curl_sessions = git_config_int(var, value);
174 #ifndef USE_CURL_MULTI
175                 if (min_curl_sessions > 1)
176                         min_curl_sessions = 1;
177 #endif
178                 return 0;
179         }
180 #ifdef USE_CURL_MULTI
181         if (!strcmp("http.maxrequests", var)) {
182                 max_requests = git_config_int(var, value);
183                 return 0;
184         }
185 #endif
186         if (!strcmp("http.lowspeedlimit", var)) {
187                 curl_low_speed_limit = (long)git_config_int(var, value);
188                 return 0;
189         }
190         if (!strcmp("http.lowspeedtime", var)) {
191                 curl_low_speed_time = (long)git_config_int(var, value);
192                 return 0;
193         }
194
195         if (!strcmp("http.noepsv", var)) {
196                 curl_ftp_no_epsv = git_config_bool(var, value);
197                 return 0;
198         }
199         if (!strcmp("http.proxy", var))
200                 return git_config_string(&curl_http_proxy, var, value);
201
202         if (!strcmp("http.cookiefile", var))
203                 return git_config_string(&curl_cookie_file, var, value);
204         if (!strcmp("http.savecookies", var)) {
205                 curl_save_cookies = git_config_bool(var, value);
206                 return 0;
207         }
208
209         if (!strcmp("http.postbuffer", var)) {
210                 http_post_buffer = git_config_int(var, value);
211                 if (http_post_buffer < LARGE_PACKET_MAX)
212                         http_post_buffer = LARGE_PACKET_MAX;
213                 return 0;
214         }
215
216         if (!strcmp("http.useragent", var))
217                 return git_config_string(&user_agent, var, value);
218
219         /* Fall back on the default ones */
220         return git_default_config(var, value, cb);
221 }
222
223 static void init_curl_http_auth(CURL *result)
224 {
225         if (!http_auth.username)
226                 return;
227
228         credential_fill(&http_auth);
229
230 #if LIBCURL_VERSION_NUM >= 0x071301
231         curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
232         curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
233 #else
234         {
235                 static struct strbuf up = STRBUF_INIT;
236                 /*
237                  * Note that we assume we only ever have a single set of
238                  * credentials in a given program run, so we do not have
239                  * to worry about updating this buffer, only setting its
240                  * initial value.
241                  */
242                 if (!up.len)
243                         strbuf_addf(&up, "%s:%s",
244                                 http_auth.username, http_auth.password);
245                 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
246         }
247 #endif
248 }
249
250 static int has_cert_password(void)
251 {
252         if (ssl_cert == NULL || ssl_cert_password_required != 1)
253                 return 0;
254         if (!cert_auth.password) {
255                 cert_auth.protocol = xstrdup("cert");
256                 cert_auth.username = xstrdup("");
257                 cert_auth.path = xstrdup(ssl_cert);
258                 credential_fill(&cert_auth);
259         }
260         return 1;
261 }
262
263 static CURL *get_curl_handle(void)
264 {
265         CURL *result = curl_easy_init();
266
267         if (!curl_ssl_verify) {
268                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
269                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
270         } else {
271                 /* Verify authenticity of the peer's certificate */
272                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
273                 /* The name in the cert must match whom we tried to connect */
274                 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
275         }
276
277 #if LIBCURL_VERSION_NUM >= 0x070907
278         curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
279 #endif
280 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
281         curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
282 #endif
283
284         if (http_proactive_auth)
285                 init_curl_http_auth(result);
286
287         if (ssl_cert != NULL)
288                 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
289         if (has_cert_password())
290                 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
291 #if LIBCURL_VERSION_NUM >= 0x070903
292         if (ssl_key != NULL)
293                 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
294 #endif
295 #if LIBCURL_VERSION_NUM >= 0x070908
296         if (ssl_capath != NULL)
297                 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
298 #endif
299         if (ssl_cainfo != NULL)
300                 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
301
302         if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
303                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
304                                  curl_low_speed_limit);
305                 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
306                                  curl_low_speed_time);
307         }
308
309         curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
310 #if LIBCURL_VERSION_NUM >= 0x071301
311         curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
312 #elif LIBCURL_VERSION_NUM >= 0x071101
313         curl_easy_setopt(result, CURLOPT_POST301, 1);
314 #endif
315
316         if (getenv("GIT_CURL_VERBOSE"))
317                 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
318
319         curl_easy_setopt(result, CURLOPT_USERAGENT,
320                 user_agent ? user_agent : git_user_agent());
321
322         if (curl_ftp_no_epsv)
323                 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
324
325 #ifdef CURLOPT_USE_SSL
326         if (curl_ssl_try)
327                 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
328 #endif
329
330         if (curl_http_proxy) {
331                 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
332                 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
333         }
334
335         return result;
336 }
337
338 static void set_from_env(const char **var, const char *envname)
339 {
340         const char *val = getenv(envname);
341         if (val)
342                 *var = val;
343 }
344
345 void http_init(struct remote *remote, const char *url, int proactive_auth)
346 {
347         char *low_speed_limit;
348         char *low_speed_time;
349
350         http_is_verbose = 0;
351
352         git_config(http_options, NULL);
353
354         curl_global_init(CURL_GLOBAL_ALL);
355
356         http_proactive_auth = proactive_auth;
357
358         if (remote && remote->http_proxy)
359                 curl_http_proxy = xstrdup(remote->http_proxy);
360
361         pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
362         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
363
364 #ifdef USE_CURL_MULTI
365         {
366                 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
367                 if (http_max_requests != NULL)
368                         max_requests = atoi(http_max_requests);
369         }
370
371         curlm = curl_multi_init();
372         if (curlm == NULL) {
373                 fprintf(stderr, "Error creating curl multi handle.\n");
374                 exit(1);
375         }
376 #endif
377
378         if (getenv("GIT_SSL_NO_VERIFY"))
379                 curl_ssl_verify = 0;
380
381         set_from_env(&ssl_cert, "GIT_SSL_CERT");
382 #if LIBCURL_VERSION_NUM >= 0x070903
383         set_from_env(&ssl_key, "GIT_SSL_KEY");
384 #endif
385 #if LIBCURL_VERSION_NUM >= 0x070908
386         set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
387 #endif
388         set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
389
390         set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
391
392         low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
393         if (low_speed_limit != NULL)
394                 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
395         low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
396         if (low_speed_time != NULL)
397                 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
398
399         if (curl_ssl_verify == -1)
400                 curl_ssl_verify = 1;
401
402         curl_session_count = 0;
403 #ifdef USE_CURL_MULTI
404         if (max_requests < 1)
405                 max_requests = DEFAULT_MAX_REQUESTS;
406 #endif
407
408         if (getenv("GIT_CURL_FTP_NO_EPSV"))
409                 curl_ftp_no_epsv = 1;
410
411         if (url) {
412                 credential_from_url(&http_auth, url);
413                 if (!ssl_cert_password_required &&
414                     getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
415                     !prefixcmp(url, "https://"))
416                         ssl_cert_password_required = 1;
417         }
418
419 #ifndef NO_CURL_EASY_DUPHANDLE
420         curl_default = get_curl_handle();
421 #endif
422 }
423
424 void http_cleanup(void)
425 {
426         struct active_request_slot *slot = active_queue_head;
427
428         while (slot != NULL) {
429                 struct active_request_slot *next = slot->next;
430                 if (slot->curl != NULL) {
431 #ifdef USE_CURL_MULTI
432                         curl_multi_remove_handle(curlm, slot->curl);
433 #endif
434                         curl_easy_cleanup(slot->curl);
435                 }
436                 free(slot);
437                 slot = next;
438         }
439         active_queue_head = NULL;
440
441 #ifndef NO_CURL_EASY_DUPHANDLE
442         curl_easy_cleanup(curl_default);
443 #endif
444
445 #ifdef USE_CURL_MULTI
446         curl_multi_cleanup(curlm);
447 #endif
448         curl_global_cleanup();
449
450         curl_slist_free_all(pragma_header);
451         pragma_header = NULL;
452
453         curl_slist_free_all(no_pragma_header);
454         no_pragma_header = NULL;
455
456         if (curl_http_proxy) {
457                 free((void *)curl_http_proxy);
458                 curl_http_proxy = NULL;
459         }
460
461         if (cert_auth.password != NULL) {
462                 memset(cert_auth.password, 0, strlen(cert_auth.password));
463                 free(cert_auth.password);
464                 cert_auth.password = NULL;
465         }
466         ssl_cert_password_required = 0;
467 }
468
469 struct active_request_slot *get_active_slot(void)
470 {
471         struct active_request_slot *slot = active_queue_head;
472         struct active_request_slot *newslot;
473
474 #ifdef USE_CURL_MULTI
475         int num_transfers;
476
477         /* Wait for a slot to open up if the queue is full */
478         while (active_requests >= max_requests) {
479                 curl_multi_perform(curlm, &num_transfers);
480                 if (num_transfers < active_requests)
481                         process_curl_messages();
482         }
483 #endif
484
485         while (slot != NULL && slot->in_use)
486                 slot = slot->next;
487
488         if (slot == NULL) {
489                 newslot = xmalloc(sizeof(*newslot));
490                 newslot->curl = NULL;
491                 newslot->in_use = 0;
492                 newslot->next = NULL;
493
494                 slot = active_queue_head;
495                 if (slot == NULL) {
496                         active_queue_head = newslot;
497                 } else {
498                         while (slot->next != NULL)
499                                 slot = slot->next;
500                         slot->next = newslot;
501                 }
502                 slot = newslot;
503         }
504
505         if (slot->curl == NULL) {
506 #ifdef NO_CURL_EASY_DUPHANDLE
507                 slot->curl = get_curl_handle();
508 #else
509                 slot->curl = curl_easy_duphandle(curl_default);
510 #endif
511                 curl_session_count++;
512         }
513
514         active_requests++;
515         slot->in_use = 1;
516         slot->results = NULL;
517         slot->finished = NULL;
518         slot->callback_data = NULL;
519         slot->callback_func = NULL;
520         curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
521         if (curl_save_cookies)
522                 curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file);
523         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
524         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
525         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
526         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
527         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
528         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
529         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
530         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
531         curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
532         if (http_auth.password)
533                 init_curl_http_auth(slot->curl);
534
535         return slot;
536 }
537
538 int start_active_slot(struct active_request_slot *slot)
539 {
540 #ifdef USE_CURL_MULTI
541         CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
542         int num_transfers;
543
544         if (curlm_result != CURLM_OK &&
545             curlm_result != CURLM_CALL_MULTI_PERFORM) {
546                 active_requests--;
547                 slot->in_use = 0;
548                 return 0;
549         }
550
551         /*
552          * We know there must be something to do, since we just added
553          * something.
554          */
555         curl_multi_perform(curlm, &num_transfers);
556 #endif
557         return 1;
558 }
559
560 #ifdef USE_CURL_MULTI
561 struct fill_chain {
562         void *data;
563         int (*fill)(void *);
564         struct fill_chain *next;
565 };
566
567 static struct fill_chain *fill_cfg;
568
569 void add_fill_function(void *data, int (*fill)(void *))
570 {
571         struct fill_chain *new = xmalloc(sizeof(*new));
572         struct fill_chain **linkp = &fill_cfg;
573         new->data = data;
574         new->fill = fill;
575         new->next = NULL;
576         while (*linkp)
577                 linkp = &(*linkp)->next;
578         *linkp = new;
579 }
580
581 void fill_active_slots(void)
582 {
583         struct active_request_slot *slot = active_queue_head;
584
585         while (active_requests < max_requests) {
586                 struct fill_chain *fill;
587                 for (fill = fill_cfg; fill; fill = fill->next)
588                         if (fill->fill(fill->data))
589                                 break;
590
591                 if (!fill)
592                         break;
593         }
594
595         while (slot != NULL) {
596                 if (!slot->in_use && slot->curl != NULL
597                         && curl_session_count > min_curl_sessions) {
598                         curl_easy_cleanup(slot->curl);
599                         slot->curl = NULL;
600                         curl_session_count--;
601                 }
602                 slot = slot->next;
603         }
604 }
605
606 void step_active_slots(void)
607 {
608         int num_transfers;
609         CURLMcode curlm_result;
610
611         do {
612                 curlm_result = curl_multi_perform(curlm, &num_transfers);
613         } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
614         if (num_transfers < active_requests) {
615                 process_curl_messages();
616                 fill_active_slots();
617         }
618 }
619 #endif
620
621 void run_active_slot(struct active_request_slot *slot)
622 {
623 #ifdef USE_CURL_MULTI
624         fd_set readfds;
625         fd_set writefds;
626         fd_set excfds;
627         int max_fd;
628         struct timeval select_timeout;
629         int finished = 0;
630
631         slot->finished = &finished;
632         while (!finished) {
633                 step_active_slots();
634
635                 if (slot->in_use) {
636 #if LIBCURL_VERSION_NUM >= 0x070f04
637                         long curl_timeout;
638                         curl_multi_timeout(curlm, &curl_timeout);
639                         if (curl_timeout == 0) {
640                                 continue;
641                         } else if (curl_timeout == -1) {
642                                 select_timeout.tv_sec  = 0;
643                                 select_timeout.tv_usec = 50000;
644                         } else {
645                                 select_timeout.tv_sec  =  curl_timeout / 1000;
646                                 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
647                         }
648 #else
649                         select_timeout.tv_sec  = 0;
650                         select_timeout.tv_usec = 50000;
651 #endif
652
653                         max_fd = -1;
654                         FD_ZERO(&readfds);
655                         FD_ZERO(&writefds);
656                         FD_ZERO(&excfds);
657                         curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
658
659                         /*
660                          * It can happen that curl_multi_timeout returns a pathologically
661                          * long timeout when curl_multi_fdset returns no file descriptors
662                          * to read.  See commit message for more details.
663                          */
664                         if (max_fd < 0 &&
665                             (select_timeout.tv_sec > 0 ||
666                              select_timeout.tv_usec > 50000)) {
667                                 select_timeout.tv_sec  = 0;
668                                 select_timeout.tv_usec = 50000;
669                         }
670
671                         select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
672                 }
673         }
674 #else
675         while (slot->in_use) {
676                 slot->curl_result = curl_easy_perform(slot->curl);
677                 finish_active_slot(slot);
678         }
679 #endif
680 }
681
682 static void closedown_active_slot(struct active_request_slot *slot)
683 {
684         active_requests--;
685         slot->in_use = 0;
686 }
687
688 static void release_active_slot(struct active_request_slot *slot)
689 {
690         closedown_active_slot(slot);
691         if (slot->curl && curl_session_count > min_curl_sessions) {
692 #ifdef USE_CURL_MULTI
693                 curl_multi_remove_handle(curlm, slot->curl);
694 #endif
695                 curl_easy_cleanup(slot->curl);
696                 slot->curl = NULL;
697                 curl_session_count--;
698         }
699 #ifdef USE_CURL_MULTI
700         fill_active_slots();
701 #endif
702 }
703
704 void finish_active_slot(struct active_request_slot *slot)
705 {
706         closedown_active_slot(slot);
707         curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
708
709         if (slot->finished != NULL)
710                 (*slot->finished) = 1;
711
712         /* Store slot results so they can be read after the slot is reused */
713         if (slot->results != NULL) {
714                 slot->results->curl_result = slot->curl_result;
715                 slot->results->http_code = slot->http_code;
716         }
717
718         /* Run callback if appropriate */
719         if (slot->callback_func != NULL)
720                 slot->callback_func(slot->callback_data);
721 }
722
723 void finish_all_active_slots(void)
724 {
725         struct active_request_slot *slot = active_queue_head;
726
727         while (slot != NULL)
728                 if (slot->in_use) {
729                         run_active_slot(slot);
730                         slot = active_queue_head;
731                 } else {
732                         slot = slot->next;
733                 }
734 }
735
736 /* Helpers for modifying and creating URLs */
737 static inline int needs_quote(int ch)
738 {
739         if (((ch >= 'A') && (ch <= 'Z'))
740                         || ((ch >= 'a') && (ch <= 'z'))
741                         || ((ch >= '0') && (ch <= '9'))
742                         || (ch == '/')
743                         || (ch == '-')
744                         || (ch == '.'))
745                 return 0;
746         return 1;
747 }
748
749 static char *quote_ref_url(const char *base, const char *ref)
750 {
751         struct strbuf buf = STRBUF_INIT;
752         const char *cp;
753         int ch;
754
755         end_url_with_slash(&buf, base);
756
757         for (cp = ref; (ch = *cp) != 0; cp++)
758                 if (needs_quote(ch))
759                         strbuf_addf(&buf, "%%%02x", ch);
760                 else
761                         strbuf_addch(&buf, *cp);
762
763         return strbuf_detach(&buf, NULL);
764 }
765
766 void append_remote_object_url(struct strbuf *buf, const char *url,
767                               const char *hex,
768                               int only_two_digit_prefix)
769 {
770         end_url_with_slash(buf, url);
771
772         strbuf_addf(buf, "objects/%.*s/", 2, hex);
773         if (!only_two_digit_prefix)
774                 strbuf_addf(buf, "%s", hex+2);
775 }
776
777 char *get_remote_object_url(const char *url, const char *hex,
778                             int only_two_digit_prefix)
779 {
780         struct strbuf buf = STRBUF_INIT;
781         append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
782         return strbuf_detach(&buf, NULL);
783 }
784
785 int handle_curl_result(struct slot_results *results)
786 {
787         /*
788          * If we see a failing http code with CURLE_OK, we have turned off
789          * FAILONERROR (to keep the server's custom error response), and should
790          * translate the code into failure here.
791          */
792         if (results->curl_result == CURLE_OK &&
793             results->http_code >= 400) {
794                 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
795                 /*
796                  * Normally curl will already have put the "reason phrase"
797                  * from the server into curl_errorstr; unfortunately without
798                  * FAILONERROR it is lost, so we can give only the numeric
799                  * status code.
800                  */
801                 snprintf(curl_errorstr, sizeof(curl_errorstr),
802                          "The requested URL returned error: %ld",
803                          results->http_code);
804         }
805
806         if (results->curl_result == CURLE_OK) {
807                 credential_approve(&http_auth);
808                 return HTTP_OK;
809         } else if (missing_target(results))
810                 return HTTP_MISSING_TARGET;
811         else if (results->http_code == 401) {
812                 if (http_auth.username && http_auth.password) {
813                         credential_reject(&http_auth);
814                         return HTTP_NOAUTH;
815                 } else {
816                         credential_fill(&http_auth);
817                         return HTTP_REAUTH;
818                 }
819         } else {
820 #if LIBCURL_VERSION_NUM >= 0x070c00
821                 if (!curl_errorstr[0])
822                         strlcpy(curl_errorstr,
823                                 curl_easy_strerror(results->curl_result),
824                                 sizeof(curl_errorstr));
825 #endif
826                 return HTTP_ERROR;
827         }
828 }
829
830 /* http_request() targets */
831 #define HTTP_REQUEST_STRBUF     0
832 #define HTTP_REQUEST_FILE       1
833
834 static int http_request(const char *url, struct strbuf *type,
835                         void *result, int target, int options)
836 {
837         struct active_request_slot *slot;
838         struct slot_results results;
839         struct curl_slist *headers = NULL;
840         struct strbuf buf = STRBUF_INIT;
841         int ret;
842
843         slot = get_active_slot();
844         slot->results = &results;
845         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
846
847         if (result == NULL) {
848                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
849         } else {
850                 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
851                 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
852
853                 if (target == HTTP_REQUEST_FILE) {
854                         long posn = ftell(result);
855                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
856                                          fwrite);
857                         if (posn > 0) {
858                                 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
859                                 headers = curl_slist_append(headers, buf.buf);
860                                 strbuf_reset(&buf);
861                         }
862                 } else
863                         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
864                                          fwrite_buffer);
865         }
866
867         strbuf_addstr(&buf, "Pragma:");
868         if (options & HTTP_NO_CACHE)
869                 strbuf_addstr(&buf, " no-cache");
870         if (options & HTTP_KEEP_ERROR)
871                 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
872
873         headers = curl_slist_append(headers, buf.buf);
874
875         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
876         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
877         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
878
879         if (start_active_slot(slot)) {
880                 run_active_slot(slot);
881                 ret = handle_curl_result(&results);
882         } else {
883                 snprintf(curl_errorstr, sizeof(curl_errorstr),
884                          "failed to start HTTP request");
885                 ret = HTTP_START_FAILED;
886         }
887
888         if (type) {
889                 char *t;
890                 strbuf_reset(type);
891                 curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
892                 if (t)
893                         strbuf_addstr(type, t);
894         }
895
896         curl_slist_free_all(headers);
897         strbuf_release(&buf);
898
899         return ret;
900 }
901
902 static int http_request_reauth(const char *url,
903                                struct strbuf *type,
904                                void *result, int target,
905                                int options)
906 {
907         int ret = http_request(url, type, result, target, options);
908         if (ret != HTTP_REAUTH)
909                 return ret;
910
911         /*
912          * If we are using KEEP_ERROR, the previous request may have
913          * put cruft into our output stream; we should clear it out before
914          * making our next request. We only know how to do this for
915          * the strbuf case, but that is enough to satisfy current callers.
916          */
917         if (options & HTTP_KEEP_ERROR) {
918                 switch (target) {
919                 case HTTP_REQUEST_STRBUF:
920                         strbuf_reset(result);
921                         break;
922                 default:
923                         die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
924                 }
925         }
926         return http_request(url, type, result, target, options);
927 }
928
929 int http_get_strbuf(const char *url,
930                     struct strbuf *type,
931                     struct strbuf *result, int options)
932 {
933         return http_request_reauth(url, type, result,
934                                    HTTP_REQUEST_STRBUF, options);
935 }
936
937 /*
938  * Downloads a URL and stores the result in the given file.
939  *
940  * If a previous interrupted download is detected (i.e. a previous temporary
941  * file is still around) the download is resumed.
942  */
943 static int http_get_file(const char *url, const char *filename, int options)
944 {
945         int ret;
946         struct strbuf tmpfile = STRBUF_INIT;
947         FILE *result;
948
949         strbuf_addf(&tmpfile, "%s.temp", filename);
950         result = fopen(tmpfile.buf, "a");
951         if (! result) {
952                 error("Unable to open local file %s", tmpfile.buf);
953                 ret = HTTP_ERROR;
954                 goto cleanup;
955         }
956
957         ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
958         fclose(result);
959
960         if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
961                 ret = HTTP_ERROR;
962 cleanup:
963         strbuf_release(&tmpfile);
964         return ret;
965 }
966
967 int http_fetch_ref(const char *base, struct ref *ref)
968 {
969         char *url;
970         struct strbuf buffer = STRBUF_INIT;
971         int ret = -1;
972
973         url = quote_ref_url(base, ref->name);
974         if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
975                 strbuf_rtrim(&buffer);
976                 if (buffer.len == 40)
977                         ret = get_sha1_hex(buffer.buf, ref->old_sha1);
978                 else if (!prefixcmp(buffer.buf, "ref: ")) {
979                         ref->symref = xstrdup(buffer.buf + 5);
980                         ret = 0;
981                 }
982         }
983
984         strbuf_release(&buffer);
985         free(url);
986         return ret;
987 }
988
989 /* Helpers for fetching packs */
990 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
991 {
992         char *url, *tmp;
993         struct strbuf buf = STRBUF_INIT;
994
995         if (http_is_verbose)
996                 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
997
998         end_url_with_slash(&buf, base_url);
999         strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
1000         url = strbuf_detach(&buf, NULL);
1001
1002         strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
1003         tmp = strbuf_detach(&buf, NULL);
1004
1005         if (http_get_file(url, tmp, 0) != HTTP_OK) {
1006                 error("Unable to get pack index %s", url);
1007                 free(tmp);
1008                 tmp = NULL;
1009         }
1010
1011         free(url);
1012         return tmp;
1013 }
1014
1015 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1016         unsigned char *sha1, const char *base_url)
1017 {
1018         struct packed_git *new_pack;
1019         char *tmp_idx = NULL;
1020         int ret;
1021
1022         if (has_pack_index(sha1)) {
1023                 new_pack = parse_pack_index(sha1, NULL);
1024                 if (!new_pack)
1025                         return -1; /* parse_pack_index() already issued error message */
1026                 goto add_pack;
1027         }
1028
1029         tmp_idx = fetch_pack_index(sha1, base_url);
1030         if (!tmp_idx)
1031                 return -1;
1032
1033         new_pack = parse_pack_index(sha1, tmp_idx);
1034         if (!new_pack) {
1035                 unlink(tmp_idx);
1036                 free(tmp_idx);
1037
1038                 return -1; /* parse_pack_index() already issued error message */
1039         }
1040
1041         ret = verify_pack_index(new_pack);
1042         if (!ret) {
1043                 close_pack_index(new_pack);
1044                 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1045         }
1046         free(tmp_idx);
1047         if (ret)
1048                 return -1;
1049
1050 add_pack:
1051         new_pack->next = *packs_head;
1052         *packs_head = new_pack;
1053         return 0;
1054 }
1055
1056 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1057 {
1058         int ret = 0, i = 0;
1059         char *url, *data;
1060         struct strbuf buf = STRBUF_INIT;
1061         unsigned char sha1[20];
1062
1063         end_url_with_slash(&buf, base_url);
1064         strbuf_addstr(&buf, "objects/info/packs");
1065         url = strbuf_detach(&buf, NULL);
1066
1067         ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1068         if (ret != HTTP_OK)
1069                 goto cleanup;
1070
1071         data = buf.buf;
1072         while (i < buf.len) {
1073                 switch (data[i]) {
1074                 case 'P':
1075                         i++;
1076                         if (i + 52 <= buf.len &&
1077                             !prefixcmp(data + i, " pack-") &&
1078                             !prefixcmp(data + i + 46, ".pack\n")) {
1079                                 get_sha1_hex(data + i + 6, sha1);
1080                                 fetch_and_setup_pack_index(packs_head, sha1,
1081                                                       base_url);
1082                                 i += 51;
1083                                 break;
1084                         }
1085                 default:
1086                         while (i < buf.len && data[i] != '\n')
1087                                 i++;
1088                 }
1089                 i++;
1090         }
1091
1092 cleanup:
1093         free(url);
1094         return ret;
1095 }
1096
1097 void release_http_pack_request(struct http_pack_request *preq)
1098 {
1099         if (preq->packfile != NULL) {
1100                 fclose(preq->packfile);
1101                 preq->packfile = NULL;
1102         }
1103         if (preq->range_header != NULL) {
1104                 curl_slist_free_all(preq->range_header);
1105                 preq->range_header = NULL;
1106         }
1107         preq->slot = NULL;
1108         free(preq->url);
1109 }
1110
1111 int finish_http_pack_request(struct http_pack_request *preq)
1112 {
1113         struct packed_git **lst;
1114         struct packed_git *p = preq->target;
1115         char *tmp_idx;
1116         struct child_process ip;
1117         const char *ip_argv[8];
1118
1119         close_pack_index(p);
1120
1121         fclose(preq->packfile);
1122         preq->packfile = NULL;
1123
1124         lst = preq->lst;
1125         while (*lst != p)
1126                 lst = &((*lst)->next);
1127         *lst = (*lst)->next;
1128
1129         tmp_idx = xstrdup(preq->tmpfile);
1130         strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1131                ".idx.temp");
1132
1133         ip_argv[0] = "index-pack";
1134         ip_argv[1] = "-o";
1135         ip_argv[2] = tmp_idx;
1136         ip_argv[3] = preq->tmpfile;
1137         ip_argv[4] = NULL;
1138
1139         memset(&ip, 0, sizeof(ip));
1140         ip.argv = ip_argv;
1141         ip.git_cmd = 1;
1142         ip.no_stdin = 1;
1143         ip.no_stdout = 1;
1144
1145         if (run_command(&ip)) {
1146                 unlink(preq->tmpfile);
1147                 unlink(tmp_idx);
1148                 free(tmp_idx);
1149                 return -1;
1150         }
1151
1152         unlink(sha1_pack_index_name(p->sha1));
1153
1154         if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1155          || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1156                 free(tmp_idx);
1157                 return -1;
1158         }
1159
1160         install_packed_git(p);
1161         free(tmp_idx);
1162         return 0;
1163 }
1164
1165 struct http_pack_request *new_http_pack_request(
1166         struct packed_git *target, const char *base_url)
1167 {
1168         long prev_posn = 0;
1169         char range[RANGE_HEADER_SIZE];
1170         struct strbuf buf = STRBUF_INIT;
1171         struct http_pack_request *preq;
1172
1173         preq = xcalloc(1, sizeof(*preq));
1174         preq->target = target;
1175
1176         end_url_with_slash(&buf, base_url);
1177         strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1178                 sha1_to_hex(target->sha1));
1179         preq->url = strbuf_detach(&buf, NULL);
1180
1181         snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1182                 sha1_pack_name(target->sha1));
1183         preq->packfile = fopen(preq->tmpfile, "a");
1184         if (!preq->packfile) {
1185                 error("Unable to open local file %s for pack",
1186                       preq->tmpfile);
1187                 goto abort;
1188         }
1189
1190         preq->slot = get_active_slot();
1191         curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1192         curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1193         curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1194         curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1195                 no_pragma_header);
1196
1197         /*
1198          * If there is data present from a previous transfer attempt,
1199          * resume where it left off
1200          */
1201         prev_posn = ftell(preq->packfile);
1202         if (prev_posn>0) {
1203                 if (http_is_verbose)
1204                         fprintf(stderr,
1205                                 "Resuming fetch of pack %s at byte %ld\n",
1206                                 sha1_to_hex(target->sha1), prev_posn);
1207                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1208                 preq->range_header = curl_slist_append(NULL, range);
1209                 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1210                         preq->range_header);
1211         }
1212
1213         return preq;
1214
1215 abort:
1216         free(preq->url);
1217         free(preq);
1218         return NULL;
1219 }
1220
1221 /* Helpers for fetching objects (loose) */
1222 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1223                                void *data)
1224 {
1225         unsigned char expn[4096];
1226         size_t size = eltsize * nmemb;
1227         int posn = 0;
1228         struct http_object_request *freq =
1229                 (struct http_object_request *)data;
1230         do {
1231                 ssize_t retval = xwrite(freq->localfile,
1232                                         (char *) ptr + posn, size - posn);
1233                 if (retval < 0)
1234                         return posn;
1235                 posn += retval;
1236         } while (posn < size);
1237
1238         freq->stream.avail_in = size;
1239         freq->stream.next_in = (void *)ptr;
1240         do {
1241                 freq->stream.next_out = expn;
1242                 freq->stream.avail_out = sizeof(expn);
1243                 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1244                 git_SHA1_Update(&freq->c, expn,
1245                                 sizeof(expn) - freq->stream.avail_out);
1246         } while (freq->stream.avail_in && freq->zret == Z_OK);
1247         return size;
1248 }
1249
1250 struct http_object_request *new_http_object_request(const char *base_url,
1251         unsigned char *sha1)
1252 {
1253         char *hex = sha1_to_hex(sha1);
1254         char *filename;
1255         char prevfile[PATH_MAX];
1256         int prevlocal;
1257         char prev_buf[PREV_BUF_SIZE];
1258         ssize_t prev_read = 0;
1259         long prev_posn = 0;
1260         char range[RANGE_HEADER_SIZE];
1261         struct curl_slist *range_header = NULL;
1262         struct http_object_request *freq;
1263
1264         freq = xcalloc(1, sizeof(*freq));
1265         hashcpy(freq->sha1, sha1);
1266         freq->localfile = -1;
1267
1268         filename = sha1_file_name(sha1);
1269         snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1270                  "%s.temp", filename);
1271
1272         snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1273         unlink_or_warn(prevfile);
1274         rename(freq->tmpfile, prevfile);
1275         unlink_or_warn(freq->tmpfile);
1276
1277         if (freq->localfile != -1)
1278                 error("fd leakage in start: %d", freq->localfile);
1279         freq->localfile = open(freq->tmpfile,
1280                                O_WRONLY | O_CREAT | O_EXCL, 0666);
1281         /*
1282          * This could have failed due to the "lazy directory creation";
1283          * try to mkdir the last path component.
1284          */
1285         if (freq->localfile < 0 && errno == ENOENT) {
1286                 char *dir = strrchr(freq->tmpfile, '/');
1287                 if (dir) {
1288                         *dir = 0;
1289                         mkdir(freq->tmpfile, 0777);
1290                         *dir = '/';
1291                 }
1292                 freq->localfile = open(freq->tmpfile,
1293                                        O_WRONLY | O_CREAT | O_EXCL, 0666);
1294         }
1295
1296         if (freq->localfile < 0) {
1297                 error("Couldn't create temporary file %s: %s",
1298                       freq->tmpfile, strerror(errno));
1299                 goto abort;
1300         }
1301
1302         git_inflate_init(&freq->stream);
1303
1304         git_SHA1_Init(&freq->c);
1305
1306         freq->url = get_remote_object_url(base_url, hex, 0);
1307
1308         /*
1309          * If a previous temp file is present, process what was already
1310          * fetched.
1311          */
1312         prevlocal = open(prevfile, O_RDONLY);
1313         if (prevlocal != -1) {
1314                 do {
1315                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1316                         if (prev_read>0) {
1317                                 if (fwrite_sha1_file(prev_buf,
1318                                                      1,
1319                                                      prev_read,
1320                                                      freq) == prev_read) {
1321                                         prev_posn += prev_read;
1322                                 } else {
1323                                         prev_read = -1;
1324                                 }
1325                         }
1326                 } while (prev_read > 0);
1327                 close(prevlocal);
1328         }
1329         unlink_or_warn(prevfile);
1330
1331         /*
1332          * Reset inflate/SHA1 if there was an error reading the previous temp
1333          * file; also rewind to the beginning of the local file.
1334          */
1335         if (prev_read == -1) {
1336                 memset(&freq->stream, 0, sizeof(freq->stream));
1337                 git_inflate_init(&freq->stream);
1338                 git_SHA1_Init(&freq->c);
1339                 if (prev_posn>0) {
1340                         prev_posn = 0;
1341                         lseek(freq->localfile, 0, SEEK_SET);
1342                         if (ftruncate(freq->localfile, 0) < 0) {
1343                                 error("Couldn't truncate temporary file %s: %s",
1344                                           freq->tmpfile, strerror(errno));
1345                                 goto abort;
1346                         }
1347                 }
1348         }
1349
1350         freq->slot = get_active_slot();
1351
1352         curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1353         curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1354         curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1355         curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1356         curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1357
1358         /*
1359          * If we have successfully processed data from a previous fetch
1360          * attempt, only fetch the data we don't already have.
1361          */
1362         if (prev_posn>0) {
1363                 if (http_is_verbose)
1364                         fprintf(stderr,
1365                                 "Resuming fetch of object %s at byte %ld\n",
1366                                 hex, prev_posn);
1367                 sprintf(range, "Range: bytes=%ld-", prev_posn);
1368                 range_header = curl_slist_append(range_header, range);
1369                 curl_easy_setopt(freq->slot->curl,
1370                                  CURLOPT_HTTPHEADER, range_header);
1371         }
1372
1373         return freq;
1374
1375 abort:
1376         free(freq->url);
1377         free(freq);
1378         return NULL;
1379 }
1380
1381 void process_http_object_request(struct http_object_request *freq)
1382 {
1383         if (freq->slot == NULL)
1384                 return;
1385         freq->curl_result = freq->slot->curl_result;
1386         freq->http_code = freq->slot->http_code;
1387         freq->slot = NULL;
1388 }
1389
1390 int finish_http_object_request(struct http_object_request *freq)
1391 {
1392         struct stat st;
1393
1394         close(freq->localfile);
1395         freq->localfile = -1;
1396
1397         process_http_object_request(freq);
1398
1399         if (freq->http_code == 416) {
1400                 warning("requested range invalid; we may already have all the data.");
1401         } else if (freq->curl_result != CURLE_OK) {
1402                 if (stat(freq->tmpfile, &st) == 0)
1403                         if (st.st_size == 0)
1404                                 unlink_or_warn(freq->tmpfile);
1405                 return -1;
1406         }
1407
1408         git_inflate_end(&freq->stream);
1409         git_SHA1_Final(freq->real_sha1, &freq->c);
1410         if (freq->zret != Z_STREAM_END) {
1411                 unlink_or_warn(freq->tmpfile);
1412                 return -1;
1413         }
1414         if (hashcmp(freq->sha1, freq->real_sha1)) {
1415                 unlink_or_warn(freq->tmpfile);
1416                 return -1;
1417         }
1418         freq->rename =
1419                 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1420
1421         return freq->rename;
1422 }
1423
1424 void abort_http_object_request(struct http_object_request *freq)
1425 {
1426         unlink_or_warn(freq->tmpfile);
1427
1428         release_http_object_request(freq);
1429 }
1430
1431 void release_http_object_request(struct http_object_request *freq)
1432 {
1433         if (freq->localfile != -1) {
1434                 close(freq->localfile);
1435                 freq->localfile = -1;
1436         }
1437         if (freq->url != NULL) {
1438                 free(freq->url);
1439                 freq->url = NULL;
1440         }
1441         if (freq->slot != NULL) {
1442                 freq->slot->callback_func = NULL;
1443                 freq->slot->callback_data = NULL;
1444                 release_active_slot(freq->slot);
1445                 freq->slot = NULL;
1446         }
1447 }