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push --force-with-lease: implement logic to populate old_sha1_expect[]
[alt-git.git] / http.c
blob2d086aedfac9a8ea384c53f3b1963149b880ed31
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 struct credential http_auth = CREDENTIAL_INIT;
49 static int http_proactive_auth;
50 static const char *user_agent;
51
52 #if LIBCURL_VERSION_NUM >= 0x071700
53 /* Use CURLOPT_KEYPASSWD as is */
54 #elif LIBCURL_VERSION_NUM >= 0x070903
55 #define CURLOPT_KEYPASSWD CURLOPT_SSLKEYPASSWD
56 #else
57 #define CURLOPT_KEYPASSWD CURLOPT_SSLCERTPASSWD
58 #endif
59
60 static struct credential cert_auth = CREDENTIAL_INIT;
61 static int ssl_cert_password_required;
62
63 static struct curl_slist *pragma_header;
64 static struct curl_slist *no_pragma_header;
65
66 static struct active_request_slot *active_queue_head;
67
68 size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
69 {
70 size_t size = eltsize * nmemb;
71 struct buffer *buffer = buffer_;
72
73 if (size > buffer->buf.len - buffer->posn)
74 size = buffer->buf.len - buffer->posn;
75 memcpy(ptr, buffer->buf.buf + buffer->posn, size);
76 buffer->posn += size;
77
78 return size;
79 }
80
81 #ifndef NO_CURL_IOCTL
82 curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
83 {
84 struct buffer *buffer = clientp;
85
86 switch (cmd) {
87 case CURLIOCMD_NOP:
88 return CURLIOE_OK;
89
90 case CURLIOCMD_RESTARTREAD:
91 buffer->posn = 0;
92 return CURLIOE_OK;
93
94 default:
95 return CURLIOE_UNKNOWNCMD;
96 }
97 }
98 #endif
99
100 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
101 {
102 size_t size = eltsize * nmemb;
103 struct strbuf *buffer = buffer_;
104
105 strbuf_add(buffer, ptr, size);
106 return size;
107 }
108
109 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
110 {
111 return eltsize * nmemb;
112 }
113
114 #ifdef USE_CURL_MULTI
115 static void process_curl_messages(void)
116 {
117 int num_messages;
118 struct active_request_slot *slot;
119 CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
120
121 while (curl_message != NULL) {
122 if (curl_message->msg == CURLMSG_DONE) {
123 int curl_result = curl_message->data.result;
124 slot = active_queue_head;
125 while (slot != NULL &&
126 slot->curl != curl_message->easy_handle)
127 slot = slot->next;
128 if (slot != NULL) {
129 curl_multi_remove_handle(curlm, slot->curl);
130 slot->curl_result = curl_result;
131 finish_active_slot(slot);
132 } else {
133 fprintf(stderr, "Received DONE message for unknown request!\n");
134 }
135 } else {
136 fprintf(stderr, "Unknown CURL message received: %d\n",
137 (int)curl_message->msg);
138 }
139 curl_message = curl_multi_info_read(curlm, &num_messages);
140 }
141 }
142 #endif
143
144 static int http_options(const char *var, const char *value, void *cb)
145 {
146 if (!strcmp("http.sslverify", var)) {
147 curl_ssl_verify = git_config_bool(var, value);
148 return 0;
149 }
150 if (!strcmp("http.sslcert", var))
151 return git_config_string(&ssl_cert, var, value);
152 #if LIBCURL_VERSION_NUM >= 0x070903
153 if (!strcmp("http.sslkey", var))
154 return git_config_string(&ssl_key, var, value);
155 #endif
156 #if LIBCURL_VERSION_NUM >= 0x070908
157 if (!strcmp("http.sslcapath", var))
158 return git_config_string(&ssl_capath, var, value);
159 #endif
160 if (!strcmp("http.sslcainfo", var))
161 return git_config_string(&ssl_cainfo, var, value);
162 if (!strcmp("http.sslcertpasswordprotected", var)) {
163 if (git_config_bool(var, value))
164 ssl_cert_password_required = 1;
165 return 0;
166 }
167 if (!strcmp("http.ssltry", var)) {
168 curl_ssl_try = git_config_bool(var, value);
169 return 0;
170 }
171 if (!strcmp("http.minsessions", var)) {
172 min_curl_sessions = git_config_int(var, value);
173 #ifndef USE_CURL_MULTI
174 if (min_curl_sessions > 1)
175 min_curl_sessions = 1;
176 #endif
177 return 0;
178 }
179 #ifdef USE_CURL_MULTI
180 if (!strcmp("http.maxrequests", var)) {
181 max_requests = git_config_int(var, value);
182 return 0;
183 }
184 #endif
185 if (!strcmp("http.lowspeedlimit", var)) {
186 curl_low_speed_limit = (long)git_config_int(var, value);
187 return 0;
188 }
189 if (!strcmp("http.lowspeedtime", var)) {
190 curl_low_speed_time = (long)git_config_int(var, value);
191 return 0;
192 }
193
194 if (!strcmp("http.noepsv", var)) {
195 curl_ftp_no_epsv = git_config_bool(var, value);
196 return 0;
197 }
198 if (!strcmp("http.proxy", var))
199 return git_config_string(&curl_http_proxy, var, value);
200
201 if (!strcmp("http.cookiefile", var))
202 return git_config_string(&curl_cookie_file, var, value);
203
204 if (!strcmp("http.postbuffer", var)) {
205 http_post_buffer = git_config_int(var, value);
206 if (http_post_buffer < LARGE_PACKET_MAX)
207 http_post_buffer = LARGE_PACKET_MAX;
208 return 0;
209 }
210
211 if (!strcmp("http.useragent", var))
212 return git_config_string(&user_agent, var, value);
213
214 /* Fall back on the default ones */
215 return git_default_config(var, value, cb);
216 }
217
218 static void init_curl_http_auth(CURL *result)
219 {
220 if (!http_auth.username)
221 return;
222
223 credential_fill(&http_auth);
224
225 #if LIBCURL_VERSION_NUM >= 0x071301
226 curl_easy_setopt(result, CURLOPT_USERNAME, http_auth.username);
227 curl_easy_setopt(result, CURLOPT_PASSWORD, http_auth.password);
228 #else
229 {
230 static struct strbuf up = STRBUF_INIT;
231 /*
232 * Note that we assume we only ever have a single set of
233 * credentials in a given program run, so we do not have
234 * to worry about updating this buffer, only setting its
235 * initial value.
236 */
237 if (!up.len)
238 strbuf_addf(&up, "%s:%s",
239 http_auth.username, http_auth.password);
240 curl_easy_setopt(result, CURLOPT_USERPWD, up.buf);
241 }
242 #endif
243 }
244
245 static int has_cert_password(void)
246 {
247 if (ssl_cert == NULL || ssl_cert_password_required != 1)
248 return 0;
249 if (!cert_auth.password) {
250 cert_auth.protocol = xstrdup("cert");
251 cert_auth.username = xstrdup("");
252 cert_auth.path = xstrdup(ssl_cert);
253 credential_fill(&cert_auth);
254 }
255 return 1;
256 }
257
258 static CURL *get_curl_handle(void)
259 {
260 CURL *result = curl_easy_init();
261
262 if (!curl_ssl_verify) {
263 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 0);
264 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 0);
265 } else {
266 /* Verify authenticity of the peer's certificate */
267 curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, 1);
268 /* The name in the cert must match whom we tried to connect */
269 curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
270 }
271
272 #if LIBCURL_VERSION_NUM >= 0x070907
273 curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
274 #endif
275 #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
276 curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
277 #endif
278
279 if (http_proactive_auth)
280 init_curl_http_auth(result);
281
282 if (ssl_cert != NULL)
283 curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
284 if (has_cert_password())
285 curl_easy_setopt(result, CURLOPT_KEYPASSWD, cert_auth.password);
286 #if LIBCURL_VERSION_NUM >= 0x070903
287 if (ssl_key != NULL)
288 curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
289 #endif
290 #if LIBCURL_VERSION_NUM >= 0x070908
291 if (ssl_capath != NULL)
292 curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
293 #endif
294 if (ssl_cainfo != NULL)
295 curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
296
297 if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
298 curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
299 curl_low_speed_limit);
300 curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
301 curl_low_speed_time);
302 }
303
304 curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
305 #if LIBCURL_VERSION_NUM >= 0x071301
306 curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
307 #elif LIBCURL_VERSION_NUM >= 0x071101
308 curl_easy_setopt(result, CURLOPT_POST301, 1);
309 #endif
310
311 if (getenv("GIT_CURL_VERBOSE"))
312 curl_easy_setopt(result, CURLOPT_VERBOSE, 1);
313
314 curl_easy_setopt(result, CURLOPT_USERAGENT,
315 user_agent ? user_agent : git_user_agent());
316
317 if (curl_ftp_no_epsv)
318 curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
319
320 #ifdef CURLOPT_USE_SSL
321 if (curl_ssl_try)
322 curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
323 #endif
324
325 if (curl_http_proxy) {
326 curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
327 curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
328 }
329
330 return result;
331 }
332
333 static void set_from_env(const char **var, const char *envname)
334 {
335 const char *val = getenv(envname);
336 if (val)
337 *var = val;
338 }
339
340 void http_init(struct remote *remote, const char *url, int proactive_auth)
341 {
342 char *low_speed_limit;
343 char *low_speed_time;
344
345 http_is_verbose = 0;
346
347 git_config(http_options, NULL);
348
349 curl_global_init(CURL_GLOBAL_ALL);
350
351 http_proactive_auth = proactive_auth;
352
353 if (remote && remote->http_proxy)
354 curl_http_proxy = xstrdup(remote->http_proxy);
355
356 pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
357 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
358
359 #ifdef USE_CURL_MULTI
360 {
361 char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
362 if (http_max_requests != NULL)
363 max_requests = atoi(http_max_requests);
364 }
365
366 curlm = curl_multi_init();
367 if (curlm == NULL) {
368 fprintf(stderr, "Error creating curl multi handle.\n");
369 exit(1);
370 }
371 #endif
372
373 if (getenv("GIT_SSL_NO_VERIFY"))
374 curl_ssl_verify = 0;
375
376 set_from_env(&ssl_cert, "GIT_SSL_CERT");
377 #if LIBCURL_VERSION_NUM >= 0x070903
378 set_from_env(&ssl_key, "GIT_SSL_KEY");
379 #endif
380 #if LIBCURL_VERSION_NUM >= 0x070908
381 set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
382 #endif
383 set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
384
385 set_from_env(&user_agent, "GIT_HTTP_USER_AGENT");
386
387 low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
388 if (low_speed_limit != NULL)
389 curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
390 low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
391 if (low_speed_time != NULL)
392 curl_low_speed_time = strtol(low_speed_time, NULL, 10);
393
394 if (curl_ssl_verify == -1)
395 curl_ssl_verify = 1;
396
397 curl_session_count = 0;
398 #ifdef USE_CURL_MULTI
399 if (max_requests < 1)
400 max_requests = DEFAULT_MAX_REQUESTS;
401 #endif
402
403 if (getenv("GIT_CURL_FTP_NO_EPSV"))
404 curl_ftp_no_epsv = 1;
405
406 if (url) {
407 credential_from_url(&http_auth, url);
408 if (!ssl_cert_password_required &&
409 getenv("GIT_SSL_CERT_PASSWORD_PROTECTED") &&
410 !prefixcmp(url, "https://"))
411 ssl_cert_password_required = 1;
412 }
413
414 #ifndef NO_CURL_EASY_DUPHANDLE
415 curl_default = get_curl_handle();
416 #endif
417 }
418
419 void http_cleanup(void)
420 {
421 struct active_request_slot *slot = active_queue_head;
422
423 while (slot != NULL) {
424 struct active_request_slot *next = slot->next;
425 if (slot->curl != NULL) {
426 #ifdef USE_CURL_MULTI
427 curl_multi_remove_handle(curlm, slot->curl);
428 #endif
429 curl_easy_cleanup(slot->curl);
430 }
431 free(slot);
432 slot = next;
433 }
434 active_queue_head = NULL;
435
436 #ifndef NO_CURL_EASY_DUPHANDLE
437 curl_easy_cleanup(curl_default);
438 #endif
439
440 #ifdef USE_CURL_MULTI
441 curl_multi_cleanup(curlm);
442 #endif
443 curl_global_cleanup();
444
445 curl_slist_free_all(pragma_header);
446 pragma_header = NULL;
447
448 curl_slist_free_all(no_pragma_header);
449 no_pragma_header = NULL;
450
451 if (curl_http_proxy) {
452 free((void *)curl_http_proxy);
453 curl_http_proxy = NULL;
454 }
455
456 if (cert_auth.password != NULL) {
457 memset(cert_auth.password, 0, strlen(cert_auth.password));
458 free(cert_auth.password);
459 cert_auth.password = NULL;
460 }
461 ssl_cert_password_required = 0;
462 }
463
464 struct active_request_slot *get_active_slot(void)
465 {
466 struct active_request_slot *slot = active_queue_head;
467 struct active_request_slot *newslot;
468
469 #ifdef USE_CURL_MULTI
470 int num_transfers;
471
472 /* Wait for a slot to open up if the queue is full */
473 while (active_requests >= max_requests) {
474 curl_multi_perform(curlm, &num_transfers);
475 if (num_transfers < active_requests)
476 process_curl_messages();
477 }
478 #endif
479
480 while (slot != NULL && slot->in_use)
481 slot = slot->next;
482
483 if (slot == NULL) {
484 newslot = xmalloc(sizeof(*newslot));
485 newslot->curl = NULL;
486 newslot->in_use = 0;
487 newslot->next = NULL;
488
489 slot = active_queue_head;
490 if (slot == NULL) {
491 active_queue_head = newslot;
492 } else {
493 while (slot->next != NULL)
494 slot = slot->next;
495 slot->next = newslot;
496 }
497 slot = newslot;
498 }
499
500 if (slot->curl == NULL) {
501 #ifdef NO_CURL_EASY_DUPHANDLE
502 slot->curl = get_curl_handle();
503 #else
504 slot->curl = curl_easy_duphandle(curl_default);
505 #endif
506 curl_session_count++;
507 }
508
509 active_requests++;
510 slot->in_use = 1;
511 slot->results = NULL;
512 slot->finished = NULL;
513 slot->callback_data = NULL;
514 slot->callback_func = NULL;
515 curl_easy_setopt(slot->curl, CURLOPT_COOKIEFILE, curl_cookie_file);
516 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
517 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
518 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
519 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
520 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
521 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
522 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
523 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
524 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
525 if (http_auth.password)
526 init_curl_http_auth(slot->curl);
527
528 return slot;
529 }
530
531 int start_active_slot(struct active_request_slot *slot)
532 {
533 #ifdef USE_CURL_MULTI
534 CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
535 int num_transfers;
536
537 if (curlm_result != CURLM_OK &&
538 curlm_result != CURLM_CALL_MULTI_PERFORM) {
539 active_requests--;
540 slot->in_use = 0;
541 return 0;
542 }
543
544 /*
545 * We know there must be something to do, since we just added
546 * something.
547 */
548 curl_multi_perform(curlm, &num_transfers);
549 #endif
550 return 1;
551 }
552
553 #ifdef USE_CURL_MULTI
554 struct fill_chain {
555 void *data;
556 int (*fill)(void *);
557 struct fill_chain *next;
558 };
559
560 static struct fill_chain *fill_cfg;
561
562 void add_fill_function(void *data, int (*fill)(void *))
563 {
564 struct fill_chain *new = xmalloc(sizeof(*new));
565 struct fill_chain **linkp = &fill_cfg;
566 new->data = data;
567 new->fill = fill;
568 new->next = NULL;
569 while (*linkp)
570 linkp = &(*linkp)->next;
571 *linkp = new;
572 }
573
574 void fill_active_slots(void)
575 {
576 struct active_request_slot *slot = active_queue_head;
577
578 while (active_requests < max_requests) {
579 struct fill_chain *fill;
580 for (fill = fill_cfg; fill; fill = fill->next)
581 if (fill->fill(fill->data))
582 break;
583
584 if (!fill)
585 break;
586 }
587
588 while (slot != NULL) {
589 if (!slot->in_use && slot->curl != NULL
590 && curl_session_count > min_curl_sessions) {
591 curl_easy_cleanup(slot->curl);
592 slot->curl = NULL;
593 curl_session_count--;
594 }
595 slot = slot->next;
596 }
597 }
598
599 void step_active_slots(void)
600 {
601 int num_transfers;
602 CURLMcode curlm_result;
603
604 do {
605 curlm_result = curl_multi_perform(curlm, &num_transfers);
606 } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
607 if (num_transfers < active_requests) {
608 process_curl_messages();
609 fill_active_slots();
610 }
611 }
612 #endif
613
614 void run_active_slot(struct active_request_slot *slot)
615 {
616 #ifdef USE_CURL_MULTI
617 fd_set readfds;
618 fd_set writefds;
619 fd_set excfds;
620 int max_fd;
621 struct timeval select_timeout;
622 int finished = 0;
623
624 slot->finished = &finished;
625 while (!finished) {
626 step_active_slots();
627
628 if (slot->in_use) {
629 #if LIBCURL_VERSION_NUM >= 0x070f04
630 long curl_timeout;
631 curl_multi_timeout(curlm, &curl_timeout);
632 if (curl_timeout == 0) {
633 continue;
634 } else if (curl_timeout == -1) {
635 select_timeout.tv_sec = 0;
636 select_timeout.tv_usec = 50000;
637 } else {
638 select_timeout.tv_sec = curl_timeout / 1000;
639 select_timeout.tv_usec = (curl_timeout % 1000) * 1000;
640 }
641 #else
642 select_timeout.tv_sec = 0;
643 select_timeout.tv_usec = 50000;
644 #endif
645
646 max_fd = -1;
647 FD_ZERO(&readfds);
648 FD_ZERO(&writefds);
649 FD_ZERO(&excfds);
650 curl_multi_fdset(curlm, &readfds, &writefds, &excfds, &max_fd);
651
652 /*
653 * It can happen that curl_multi_timeout returns a pathologically
654 * long timeout when curl_multi_fdset returns no file descriptors
655 * to read. See commit message for more details.
656 */
657 if (max_fd < 0 &&
658 (select_timeout.tv_sec > 0 ||
659 select_timeout.tv_usec > 50000)) {
660 select_timeout.tv_sec = 0;
661 select_timeout.tv_usec = 50000;
662 }
663
664 select(max_fd+1, &readfds, &writefds, &excfds, &select_timeout);
665 }
666 }
667 #else
668 while (slot->in_use) {
669 slot->curl_result = curl_easy_perform(slot->curl);
670 finish_active_slot(slot);
671 }
672 #endif
673 }
674
675 static void closedown_active_slot(struct active_request_slot *slot)
676 {
677 active_requests--;
678 slot->in_use = 0;
679 }
680
681 static void release_active_slot(struct active_request_slot *slot)
682 {
683 closedown_active_slot(slot);
684 if (slot->curl && curl_session_count > min_curl_sessions) {
685 #ifdef USE_CURL_MULTI
686 curl_multi_remove_handle(curlm, slot->curl);
687 #endif
688 curl_easy_cleanup(slot->curl);
689 slot->curl = NULL;
690 curl_session_count--;
691 }
692 #ifdef USE_CURL_MULTI
693 fill_active_slots();
694 #endif
695 }
696
697 void finish_active_slot(struct active_request_slot *slot)
698 {
699 closedown_active_slot(slot);
700 curl_easy_getinfo(slot->curl, CURLINFO_HTTP_CODE, &slot->http_code);
701
702 if (slot->finished != NULL)
703 (*slot->finished) = 1;
704
705 /* Store slot results so they can be read after the slot is reused */
706 if (slot->results != NULL) {
707 slot->results->curl_result = slot->curl_result;
708 slot->results->http_code = slot->http_code;
709 }
710
711 /* Run callback if appropriate */
712 if (slot->callback_func != NULL)
713 slot->callback_func(slot->callback_data);
714 }
715
716 void finish_all_active_slots(void)
717 {
718 struct active_request_slot *slot = active_queue_head;
719
720 while (slot != NULL)
721 if (slot->in_use) {
722 run_active_slot(slot);
723 slot = active_queue_head;
724 } else {
725 slot = slot->next;
726 }
727 }
728
729 /* Helpers for modifying and creating URLs */
730 static inline int needs_quote(int ch)
731 {
732 if (((ch >= 'A') && (ch <= 'Z'))
733 || ((ch >= 'a') && (ch <= 'z'))
734 || ((ch >= '0') && (ch <= '9'))
735 || (ch == '/')
736 || (ch == '-')
737 || (ch == '.'))
738 return 0;
739 return 1;
740 }
741
742 static char *quote_ref_url(const char *base, const char *ref)
743 {
744 struct strbuf buf = STRBUF_INIT;
745 const char *cp;
746 int ch;
747
748 end_url_with_slash(&buf, base);
749
750 for (cp = ref; (ch = *cp) != 0; cp++)
751 if (needs_quote(ch))
752 strbuf_addf(&buf, "%%%02x", ch);
753 else
754 strbuf_addch(&buf, *cp);
755
756 return strbuf_detach(&buf, NULL);
757 }
758
759 void append_remote_object_url(struct strbuf *buf, const char *url,
760 const char *hex,
761 int only_two_digit_prefix)
762 {
763 end_url_with_slash(buf, url);
764
765 strbuf_addf(buf, "objects/%.*s/", 2, hex);
766 if (!only_two_digit_prefix)
767 strbuf_addf(buf, "%s", hex+2);
768 }
769
770 char *get_remote_object_url(const char *url, const char *hex,
771 int only_two_digit_prefix)
772 {
773 struct strbuf buf = STRBUF_INIT;
774 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
775 return strbuf_detach(&buf, NULL);
776 }
777
778 int handle_curl_result(struct slot_results *results)
779 {
780 /*
781 * If we see a failing http code with CURLE_OK, we have turned off
782 * FAILONERROR (to keep the server's custom error response), and should
783 * translate the code into failure here.
784 */
785 if (results->curl_result == CURLE_OK &&
786 results->http_code >= 400) {
787 results->curl_result = CURLE_HTTP_RETURNED_ERROR;
788 /*
789 * Normally curl will already have put the "reason phrase"
790 * from the server into curl_errorstr; unfortunately without
791 * FAILONERROR it is lost, so we can give only the numeric
792 * status code.
793 */
794 snprintf(curl_errorstr, sizeof(curl_errorstr),
795 "The requested URL returned error: %ld",
796 results->http_code);
797 }
798
799 if (results->curl_result == CURLE_OK) {
800 credential_approve(&http_auth);
801 return HTTP_OK;
802 } else if (missing_target(results))
803 return HTTP_MISSING_TARGET;
804 else if (results->http_code == 401) {
805 if (http_auth.username && http_auth.password) {
806 credential_reject(&http_auth);
807 return HTTP_NOAUTH;
808 } else {
809 credential_fill(&http_auth);
810 return HTTP_REAUTH;
811 }
812 } else {
813 #if LIBCURL_VERSION_NUM >= 0x070c00
814 if (!curl_errorstr[0])
815 strlcpy(curl_errorstr,
816 curl_easy_strerror(results->curl_result),
817 sizeof(curl_errorstr));
818 #endif
819 return HTTP_ERROR;
820 }
821 }
822
823 /* http_request() targets */
824 #define HTTP_REQUEST_STRBUF 0
825 #define HTTP_REQUEST_FILE 1
826
827 static int http_request(const char *url, struct strbuf *type,
828 void *result, int target, int options)
829 {
830 struct active_request_slot *slot;
831 struct slot_results results;
832 struct curl_slist *headers = NULL;
833 struct strbuf buf = STRBUF_INIT;
834 int ret;
835
836 slot = get_active_slot();
837 slot->results = &results;
838 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
839
840 if (result == NULL) {
841 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
842 } else {
843 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
844 curl_easy_setopt(slot->curl, CURLOPT_FILE, result);
845
846 if (target == HTTP_REQUEST_FILE) {
847 long posn = ftell(result);
848 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
849 fwrite);
850 if (posn > 0) {
851 strbuf_addf(&buf, "Range: bytes=%ld-", posn);
852 headers = curl_slist_append(headers, buf.buf);
853 strbuf_reset(&buf);
854 }
855 } else
856 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
857 fwrite_buffer);
858 }
859
860 strbuf_addstr(&buf, "Pragma:");
861 if (options & HTTP_NO_CACHE)
862 strbuf_addstr(&buf, " no-cache");
863 if (options & HTTP_KEEP_ERROR)
864 curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
865
866 headers = curl_slist_append(headers, buf.buf);
867
868 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
869 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
870 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
871
872 if (start_active_slot(slot)) {
873 run_active_slot(slot);
874 ret = handle_curl_result(&results);
875 } else {
876 snprintf(curl_errorstr, sizeof(curl_errorstr),
877 "failed to start HTTP request");
878 ret = HTTP_START_FAILED;
879 }
880
881 if (type) {
882 char *t;
883 strbuf_reset(type);
884 curl_easy_getinfo(slot->curl, CURLINFO_CONTENT_TYPE, &t);
885 if (t)
886 strbuf_addstr(type, t);
887 }
888
889 curl_slist_free_all(headers);
890 strbuf_release(&buf);
891
892 return ret;
893 }
894
895 static int http_request_reauth(const char *url,
896 struct strbuf *type,
897 void *result, int target,
898 int options)
899 {
900 int ret = http_request(url, type, result, target, options);
901 if (ret != HTTP_REAUTH)
902 return ret;
903
904 /*
905 * If we are using KEEP_ERROR, the previous request may have
906 * put cruft into our output stream; we should clear it out before
907 * making our next request. We only know how to do this for
908 * the strbuf case, but that is enough to satisfy current callers.
909 */
910 if (options & HTTP_KEEP_ERROR) {
911 switch (target) {
912 case HTTP_REQUEST_STRBUF:
913 strbuf_reset(result);
914 break;
915 default:
916 die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
917 }
918 }
919 return http_request(url, type, result, target, options);
920 }
921
922 int http_get_strbuf(const char *url,
923 struct strbuf *type,
924 struct strbuf *result, int options)
925 {
926 return http_request_reauth(url, type, result,
927 HTTP_REQUEST_STRBUF, options);
928 }
929
930 /*
931 * Downloads a URL and stores the result in the given file.
932 *
933 * If a previous interrupted download is detected (i.e. a previous temporary
934 * file is still around) the download is resumed.
935 */
936 static int http_get_file(const char *url, const char *filename, int options)
937 {
938 int ret;
939 struct strbuf tmpfile = STRBUF_INIT;
940 FILE *result;
941
942 strbuf_addf(&tmpfile, "%s.temp", filename);
943 result = fopen(tmpfile.buf, "a");
944 if (! result) {
945 error("Unable to open local file %s", tmpfile.buf);
946 ret = HTTP_ERROR;
947 goto cleanup;
948 }
949
950 ret = http_request_reauth(url, NULL, result, HTTP_REQUEST_FILE, options);
951 fclose(result);
952
953 if ((ret == HTTP_OK) && move_temp_to_file(tmpfile.buf, filename))
954 ret = HTTP_ERROR;
955 cleanup:
956 strbuf_release(&tmpfile);
957 return ret;
958 }
959
960 int http_fetch_ref(const char *base, struct ref *ref)
961 {
962 char *url;
963 struct strbuf buffer = STRBUF_INIT;
964 int ret = -1;
965
966 url = quote_ref_url(base, ref->name);
967 if (http_get_strbuf(url, NULL, &buffer, HTTP_NO_CACHE) == HTTP_OK) {
968 strbuf_rtrim(&buffer);
969 if (buffer.len == 40)
970 ret = get_sha1_hex(buffer.buf, ref->old_sha1);
971 else if (!prefixcmp(buffer.buf, "ref: ")) {
972 ref->symref = xstrdup(buffer.buf + 5);
973 ret = 0;
974 }
975 }
976
977 strbuf_release(&buffer);
978 free(url);
979 return ret;
980 }
981
982 /* Helpers for fetching packs */
983 static char *fetch_pack_index(unsigned char *sha1, const char *base_url)
984 {
985 char *url, *tmp;
986 struct strbuf buf = STRBUF_INIT;
987
988 if (http_is_verbose)
989 fprintf(stderr, "Getting index for pack %s\n", sha1_to_hex(sha1));
990
991 end_url_with_slash(&buf, base_url);
992 strbuf_addf(&buf, "objects/pack/pack-%s.idx", sha1_to_hex(sha1));
993 url = strbuf_detach(&buf, NULL);
994
995 strbuf_addf(&buf, "%s.temp", sha1_pack_index_name(sha1));
996 tmp = strbuf_detach(&buf, NULL);
997
998 if (http_get_file(url, tmp, 0) != HTTP_OK) {
999 error("Unable to get pack index %s", url);
1000 free(tmp);
1001 tmp = NULL;
1002 }
1003
1004 free(url);
1005 return tmp;
1006 }
1007
1008 static int fetch_and_setup_pack_index(struct packed_git **packs_head,
1009 unsigned char *sha1, const char *base_url)
1010 {
1011 struct packed_git *new_pack;
1012 char *tmp_idx = NULL;
1013 int ret;
1014
1015 if (has_pack_index(sha1)) {
1016 new_pack = parse_pack_index(sha1, NULL);
1017 if (!new_pack)
1018 return -1; /* parse_pack_index() already issued error message */
1019 goto add_pack;
1020 }
1021
1022 tmp_idx = fetch_pack_index(sha1, base_url);
1023 if (!tmp_idx)
1024 return -1;
1025
1026 new_pack = parse_pack_index(sha1, tmp_idx);
1027 if (!new_pack) {
1028 unlink(tmp_idx);
1029 free(tmp_idx);
1030
1031 return -1; /* parse_pack_index() already issued error message */
1032 }
1033
1034 ret = verify_pack_index(new_pack);
1035 if (!ret) {
1036 close_pack_index(new_pack);
1037 ret = move_temp_to_file(tmp_idx, sha1_pack_index_name(sha1));
1038 }
1039 free(tmp_idx);
1040 if (ret)
1041 return -1;
1042
1043 add_pack:
1044 new_pack->next = *packs_head;
1045 *packs_head = new_pack;
1046 return 0;
1047 }
1048
1049 int http_get_info_packs(const char *base_url, struct packed_git **packs_head)
1050 {
1051 int ret = 0, i = 0;
1052 char *url, *data;
1053 struct strbuf buf = STRBUF_INIT;
1054 unsigned char sha1[20];
1055
1056 end_url_with_slash(&buf, base_url);
1057 strbuf_addstr(&buf, "objects/info/packs");
1058 url = strbuf_detach(&buf, NULL);
1059
1060 ret = http_get_strbuf(url, NULL, &buf, HTTP_NO_CACHE);
1061 if (ret != HTTP_OK)
1062 goto cleanup;
1063
1064 data = buf.buf;
1065 while (i < buf.len) {
1066 switch (data[i]) {
1067 case 'P':
1068 i++;
1069 if (i + 52 <= buf.len &&
1070 !prefixcmp(data + i, " pack-") &&
1071 !prefixcmp(data + i + 46, ".pack\n")) {
1072 get_sha1_hex(data + i + 6, sha1);
1073 fetch_and_setup_pack_index(packs_head, sha1,
1074 base_url);
1075 i += 51;
1076 break;
1077 }
1078 default:
1079 while (i < buf.len && data[i] != '\n')
1080 i++;
1081 }
1082 i++;
1083 }
1084
1085 cleanup:
1086 free(url);
1087 return ret;
1088 }
1089
1090 void release_http_pack_request(struct http_pack_request *preq)
1091 {
1092 if (preq->packfile != NULL) {
1093 fclose(preq->packfile);
1094 preq->packfile = NULL;
1095 }
1096 if (preq->range_header != NULL) {
1097 curl_slist_free_all(preq->range_header);
1098 preq->range_header = NULL;
1099 }
1100 preq->slot = NULL;
1101 free(preq->url);
1102 }
1103
1104 int finish_http_pack_request(struct http_pack_request *preq)
1105 {
1106 struct packed_git **lst;
1107 struct packed_git *p = preq->target;
1108 char *tmp_idx;
1109 struct child_process ip;
1110 const char *ip_argv[8];
1111
1112 close_pack_index(p);
1113
1114 fclose(preq->packfile);
1115 preq->packfile = NULL;
1116
1117 lst = preq->lst;
1118 while (*lst != p)
1119 lst = &((*lst)->next);
1120 *lst = (*lst)->next;
1121
1122 tmp_idx = xstrdup(preq->tmpfile);
1123 strcpy(tmp_idx + strlen(tmp_idx) - strlen(".pack.temp"),
1124 ".idx.temp");
1125
1126 ip_argv[0] = "index-pack";
1127 ip_argv[1] = "-o";
1128 ip_argv[2] = tmp_idx;
1129 ip_argv[3] = preq->tmpfile;
1130 ip_argv[4] = NULL;
1131
1132 memset(&ip, 0, sizeof(ip));
1133 ip.argv = ip_argv;
1134 ip.git_cmd = 1;
1135 ip.no_stdin = 1;
1136 ip.no_stdout = 1;
1137
1138 if (run_command(&ip)) {
1139 unlink(preq->tmpfile);
1140 unlink(tmp_idx);
1141 free(tmp_idx);
1142 return -1;
1143 }
1144
1145 unlink(sha1_pack_index_name(p->sha1));
1146
1147 if (move_temp_to_file(preq->tmpfile, sha1_pack_name(p->sha1))
1148 || move_temp_to_file(tmp_idx, sha1_pack_index_name(p->sha1))) {
1149 free(tmp_idx);
1150 return -1;
1151 }
1152
1153 install_packed_git(p);
1154 free(tmp_idx);
1155 return 0;
1156 }
1157
1158 struct http_pack_request *new_http_pack_request(
1159 struct packed_git *target, const char *base_url)
1160 {
1161 long prev_posn = 0;
1162 char range[RANGE_HEADER_SIZE];
1163 struct strbuf buf = STRBUF_INIT;
1164 struct http_pack_request *preq;
1165
1166 preq = xcalloc(1, sizeof(*preq));
1167 preq->target = target;
1168
1169 end_url_with_slash(&buf, base_url);
1170 strbuf_addf(&buf, "objects/pack/pack-%s.pack",
1171 sha1_to_hex(target->sha1));
1172 preq->url = strbuf_detach(&buf, NULL);
1173
1174 snprintf(preq->tmpfile, sizeof(preq->tmpfile), "%s.temp",
1175 sha1_pack_name(target->sha1));
1176 preq->packfile = fopen(preq->tmpfile, "a");
1177 if (!preq->packfile) {
1178 error("Unable to open local file %s for pack",
1179 preq->tmpfile);
1180 goto abort;
1181 }
1182
1183 preq->slot = get_active_slot();
1184 curl_easy_setopt(preq->slot->curl, CURLOPT_FILE, preq->packfile);
1185 curl_easy_setopt(preq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
1186 curl_easy_setopt(preq->slot->curl, CURLOPT_URL, preq->url);
1187 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1188 no_pragma_header);
1189
1190 /*
1191 * If there is data present from a previous transfer attempt,
1192 * resume where it left off
1193 */
1194 prev_posn = ftell(preq->packfile);
1195 if (prev_posn>0) {
1196 if (http_is_verbose)
1197 fprintf(stderr,
1198 "Resuming fetch of pack %s at byte %ld\n",
1199 sha1_to_hex(target->sha1), prev_posn);
1200 sprintf(range, "Range: bytes=%ld-", prev_posn);
1201 preq->range_header = curl_slist_append(NULL, range);
1202 curl_easy_setopt(preq->slot->curl, CURLOPT_HTTPHEADER,
1203 preq->range_header);
1204 }
1205
1206 return preq;
1207
1208 abort:
1209 free(preq->url);
1210 free(preq);
1211 return NULL;
1212 }
1213
1214 /* Helpers for fetching objects (loose) */
1215 static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
1216 void *data)
1217 {
1218 unsigned char expn[4096];
1219 size_t size = eltsize * nmemb;
1220 int posn = 0;
1221 struct http_object_request *freq =
1222 (struct http_object_request *)data;
1223 do {
1224 ssize_t retval = xwrite(freq->localfile,
1225 (char *) ptr + posn, size - posn);
1226 if (retval < 0)
1227 return posn;
1228 posn += retval;
1229 } while (posn < size);
1230
1231 freq->stream.avail_in = size;
1232 freq->stream.next_in = (void *)ptr;
1233 do {
1234 freq->stream.next_out = expn;
1235 freq->stream.avail_out = sizeof(expn);
1236 freq->zret = git_inflate(&freq->stream, Z_SYNC_FLUSH);
1237 git_SHA1_Update(&freq->c, expn,
1238 sizeof(expn) - freq->stream.avail_out);
1239 } while (freq->stream.avail_in && freq->zret == Z_OK);
1240 return size;
1241 }
1242
1243 struct http_object_request *new_http_object_request(const char *base_url,
1244 unsigned char *sha1)
1245 {
1246 char *hex = sha1_to_hex(sha1);
1247 char *filename;
1248 char prevfile[PATH_MAX];
1249 int prevlocal;
1250 char prev_buf[PREV_BUF_SIZE];
1251 ssize_t prev_read = 0;
1252 long prev_posn = 0;
1253 char range[RANGE_HEADER_SIZE];
1254 struct curl_slist *range_header = NULL;
1255 struct http_object_request *freq;
1256
1257 freq = xcalloc(1, sizeof(*freq));
1258 hashcpy(freq->sha1, sha1);
1259 freq->localfile = -1;
1260
1261 filename = sha1_file_name(sha1);
1262 snprintf(freq->tmpfile, sizeof(freq->tmpfile),
1263 "%s.temp", filename);
1264
1265 snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
1266 unlink_or_warn(prevfile);
1267 rename(freq->tmpfile, prevfile);
1268 unlink_or_warn(freq->tmpfile);
1269
1270 if (freq->localfile != -1)
1271 error("fd leakage in start: %d", freq->localfile);
1272 freq->localfile = open(freq->tmpfile,
1273 O_WRONLY | O_CREAT | O_EXCL, 0666);
1274 /*
1275 * This could have failed due to the "lazy directory creation";
1276 * try to mkdir the last path component.
1277 */
1278 if (freq->localfile < 0 && errno == ENOENT) {
1279 char *dir = strrchr(freq->tmpfile, '/');
1280 if (dir) {
1281 *dir = 0;
1282 mkdir(freq->tmpfile, 0777);
1283 *dir = '/';
1284 }
1285 freq->localfile = open(freq->tmpfile,
1286 O_WRONLY | O_CREAT | O_EXCL, 0666);
1287 }
1288
1289 if (freq->localfile < 0) {
1290 error("Couldn't create temporary file %s: %s",
1291 freq->tmpfile, strerror(errno));
1292 goto abort;
1293 }
1294
1295 git_inflate_init(&freq->stream);
1296
1297 git_SHA1_Init(&freq->c);
1298
1299 freq->url = get_remote_object_url(base_url, hex, 0);
1300
1301 /*
1302 * If a previous temp file is present, process what was already
1303 * fetched.
1304 */
1305 prevlocal = open(prevfile, O_RDONLY);
1306 if (prevlocal != -1) {
1307 do {
1308 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
1309 if (prev_read>0) {
1310 if (fwrite_sha1_file(prev_buf,
1311 1,
1312 prev_read,
1313 freq) == prev_read) {
1314 prev_posn += prev_read;
1315 } else {
1316 prev_read = -1;
1317 }
1318 }
1319 } while (prev_read > 0);
1320 close(prevlocal);
1321 }
1322 unlink_or_warn(prevfile);
1323
1324 /*
1325 * Reset inflate/SHA1 if there was an error reading the previous temp
1326 * file; also rewind to the beginning of the local file.
1327 */
1328 if (prev_read == -1) {
1329 memset(&freq->stream, 0, sizeof(freq->stream));
1330 git_inflate_init(&freq->stream);
1331 git_SHA1_Init(&freq->c);
1332 if (prev_posn>0) {
1333 prev_posn = 0;
1334 lseek(freq->localfile, 0, SEEK_SET);
1335 if (ftruncate(freq->localfile, 0) < 0) {
1336 error("Couldn't truncate temporary file %s: %s",
1337 freq->tmpfile, strerror(errno));
1338 goto abort;
1339 }
1340 }
1341 }
1342
1343 freq->slot = get_active_slot();
1344
1345 curl_easy_setopt(freq->slot->curl, CURLOPT_FILE, freq);
1346 curl_easy_setopt(freq->slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1347 curl_easy_setopt(freq->slot->curl, CURLOPT_ERRORBUFFER, freq->errorstr);
1348 curl_easy_setopt(freq->slot->curl, CURLOPT_URL, freq->url);
1349 curl_easy_setopt(freq->slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
1350
1351 /*
1352 * If we have successfully processed data from a previous fetch
1353 * attempt, only fetch the data we don't already have.
1354 */
1355 if (prev_posn>0) {
1356 if (http_is_verbose)
1357 fprintf(stderr,
1358 "Resuming fetch of object %s at byte %ld\n",
1359 hex, prev_posn);
1360 sprintf(range, "Range: bytes=%ld-", prev_posn);
1361 range_header = curl_slist_append(range_header, range);
1362 curl_easy_setopt(freq->slot->curl,
1363 CURLOPT_HTTPHEADER, range_header);
1364 }
1365
1366 return freq;
1367
1368 abort:
1369 free(freq->url);
1370 free(freq);
1371 return NULL;
1372 }
1373
1374 void process_http_object_request(struct http_object_request *freq)
1375 {
1376 if (freq->slot == NULL)
1377 return;
1378 freq->curl_result = freq->slot->curl_result;
1379 freq->http_code = freq->slot->http_code;
1380 freq->slot = NULL;
1381 }
1382
1383 int finish_http_object_request(struct http_object_request *freq)
1384 {
1385 struct stat st;
1386
1387 close(freq->localfile);
1388 freq->localfile = -1;
1389
1390 process_http_object_request(freq);
1391
1392 if (freq->http_code == 416) {
1393 warning("requested range invalid; we may already have all the data.");
1394 } else if (freq->curl_result != CURLE_OK) {
1395 if (stat(freq->tmpfile, &st) == 0)
1396 if (st.st_size == 0)
1397 unlink_or_warn(freq->tmpfile);
1398 return -1;
1399 }
1400
1401 git_inflate_end(&freq->stream);
1402 git_SHA1_Final(freq->real_sha1, &freq->c);
1403 if (freq->zret != Z_STREAM_END) {
1404 unlink_or_warn(freq->tmpfile);
1405 return -1;
1406 }
1407 if (hashcmp(freq->sha1, freq->real_sha1)) {
1408 unlink_or_warn(freq->tmpfile);
1409 return -1;
1410 }
1411 freq->rename =
1412 move_temp_to_file(freq->tmpfile, sha1_file_name(freq->sha1));
1413
1414 return freq->rename;
1415 }
1416
1417 void abort_http_object_request(struct http_object_request *freq)
1418 {
1419 unlink_or_warn(freq->tmpfile);
1420
1421 release_http_object_request(freq);
1422 }
1423
1424 void release_http_object_request(struct http_object_request *freq)
1425 {
1426 if (freq->localfile != -1) {
1427 close(freq->localfile);
1428 freq->localfile = -1;
1429 }
1430 if (freq->url != NULL) {
1431 free(freq->url);
1432 freq->url = NULL;
1433 }
1434 if (freq->slot != NULL) {
1435 freq->slot->callback_func = NULL;
1436 freq->slot->callback_data = NULL;
1437 release_active_slot(freq->slot);
1438 freq->slot = NULL;
1439 }
1440 }
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