http: Reorder two code blocks
[libav.git] / libavformat / http.c
1 /*
2 * HTTP protocol for avconv client
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "avformat.h"
24 #include <unistd.h>
25 #include "internal.h"
26 #include "network.h"
27 #include "http.h"
28 #include "os_support.h"
29 #include "httpauth.h"
30 #include "url.h"
31 #include "libavutil/opt.h"
32
33 /* XXX: POST protocol is not completely implemented because avconv uses
34 only a subset of it. */
35
36 /* used for protocol handling */
37 #define BUFFER_SIZE 1024
38 #define MAX_REDIRECTS 8
39
40 typedef struct {
41 const AVClass *class;
42 URLContext *hd;
43 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
44 int line_count;
45 int http_code;
46 int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
47 int64_t off, filesize;
48 char location[MAX_URL_SIZE];
49 HTTPAuthState auth_state;
50 HTTPAuthState proxy_auth_state;
51 char *headers;
52 int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
53 int chunked_post;
54 } HTTPContext;
55
56 #define OFFSET(x) offsetof(HTTPContext, x)
57 #define D AV_OPT_FLAG_DECODING_PARAM
58 #define E AV_OPT_FLAG_ENCODING_PARAM
59 static const AVOption options[] = {
60 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.dbl = 1}, 0, 1, E },
61 {"headers", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
62 {NULL}
63 };
64 #define HTTP_CLASS(flavor)\
65 static const AVClass flavor ## _context_class = {\
66 .class_name = #flavor,\
67 .item_name = av_default_item_name,\
68 .option = options,\
69 .version = LIBAVUTIL_VERSION_INT,\
70 };
71
72 HTTP_CLASS(http);
73 HTTP_CLASS(https);
74
75 static int http_connect(URLContext *h, const char *path, const char *local_path,
76 const char *hoststr, const char *auth,
77 const char *proxyauth, int *new_location);
78
79 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
80 {
81 memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
82 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
83 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
84 &((HTTPContext*)src->priv_data)->proxy_auth_state,
85 sizeof(HTTPAuthState));
86 }
87
88 /* return non zero if error */
89 static int http_open_cnx(URLContext *h)
90 {
91 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
92 char hostname[1024], hoststr[1024], proto[10];
93 char auth[1024], proxyauth[1024];
94 char path1[1024];
95 char buf[1024], urlbuf[1024];
96 int port, use_proxy, err, location_changed = 0, redirects = 0;
97 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
98 HTTPContext *s = h->priv_data;
99 URLContext *hd = NULL;
100
101 proxy_path = getenv("http_proxy");
102 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
103 av_strstart(proxy_path, "http://", NULL);
104
105 /* fill the dest addr */
106 redo:
107 /* needed in any case to build the host string */
108 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
109 hostname, sizeof(hostname), &port,
110 path1, sizeof(path1), s->location);
111 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
112
113 if (!strcmp(proto, "https")) {
114 lower_proto = "tls";
115 if (port < 0)
116 port = 443;
117 }
118 if (port < 0)
119 port = 80;
120
121 if (path1[0] == '\0')
122 path = "/";
123 else
124 path = path1;
125 local_path = path;
126 if (use_proxy) {
127 /* Reassemble the request URL without auth string - we don't
128 * want to leak the auth to the proxy. */
129 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
130 path1);
131 path = urlbuf;
132 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
133 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
134 }
135
136 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
137 err = ffurl_open(&hd, buf, AVIO_FLAG_READ_WRITE,
138 &h->interrupt_callback, NULL);
139 if (err < 0)
140 goto fail;
141
142 s->hd = hd;
143 cur_auth_type = s->auth_state.auth_type;
144 cur_proxy_auth_type = s->auth_state.auth_type;
145 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
146 goto fail;
147 if (s->http_code == 401) {
148 if (cur_auth_type == HTTP_AUTH_NONE && s->auth_state.auth_type != HTTP_AUTH_NONE) {
149 ffurl_close(hd);
150 goto redo;
151 } else
152 goto fail;
153 }
154 if (s->http_code == 407) {
155 if (cur_proxy_auth_type == HTTP_AUTH_NONE &&
156 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE) {
157 ffurl_close(hd);
158 goto redo;
159 } else
160 goto fail;
161 }
162 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
163 && location_changed == 1) {
164 /* url moved, get next */
165 ffurl_close(hd);
166 if (redirects++ >= MAX_REDIRECTS)
167 return AVERROR(EIO);
168 location_changed = 0;
169 goto redo;
170 }
171 return 0;
172 fail:
173 if (hd)
174 ffurl_close(hd);
175 s->hd = NULL;
176 return AVERROR(EIO);
177 }
178
179 static int http_open(URLContext *h, const char *uri, int flags)
180 {
181 HTTPContext *s = h->priv_data;
182
183 h->is_streamed = 1;
184
185 s->filesize = -1;
186 av_strlcpy(s->location, uri, sizeof(s->location));
187
188 if (s->headers) {
189 int len = strlen(s->headers);
190 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
191 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
192 }
193
194 return http_open_cnx(h);
195 }
196 static int http_getc(HTTPContext *s)
197 {
198 int len;
199 if (s->buf_ptr >= s->buf_end) {
200 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
201 if (len < 0) {
202 return AVERROR(EIO);
203 } else if (len == 0) {
204 return -1;
205 } else {
206 s->buf_ptr = s->buffer;
207 s->buf_end = s->buffer + len;
208 }
209 }
210 return *s->buf_ptr++;
211 }
212
213 static int http_get_line(HTTPContext *s, char *line, int line_size)
214 {
215 int ch;
216 char *q;
217
218 q = line;
219 for(;;) {
220 ch = http_getc(s);
221 if (ch < 0)
222 return AVERROR(EIO);
223 if (ch == '\n') {
224 /* process line */
225 if (q > line && q[-1] == '\r')
226 q--;
227 *q = '\0';
228
229 return 0;
230 } else {
231 if ((q - line) < line_size - 1)
232 *q++ = ch;
233 }
234 }
235 }
236
237 static int process_line(URLContext *h, char *line, int line_count,
238 int *new_location)
239 {
240 HTTPContext *s = h->priv_data;
241 char *tag, *p, *end;
242
243 /* end of header */
244 if (line[0] == '\0')
245 return 0;
246
247 p = line;
248 if (line_count == 0) {
249 while (!isspace(*p) && *p != '\0')
250 p++;
251 while (isspace(*p))
252 p++;
253 s->http_code = strtol(p, &end, 10);
254
255 av_dlog(NULL, "http_code=%d\n", s->http_code);
256
257 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
258 * don't abort until all headers have been parsed. */
259 if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
260 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
261 (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
262 end += strspn(end, SPACE_CHARS);
263 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
264 s->http_code, end);
265 return -1;
266 }
267 } else {
268 while (*p != '\0' && *p != ':')
269 p++;
270 if (*p != ':')
271 return 1;
272
273 *p = '\0';
274 tag = line;
275 p++;
276 while (isspace(*p))
277 p++;
278 if (!av_strcasecmp(tag, "Location")) {
279 strcpy(s->location, p);
280 *new_location = 1;
281 } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
282 s->filesize = atoll(p);
283 } else if (!av_strcasecmp (tag, "Content-Range")) {
284 /* "bytes $from-$to/$document_size" */
285 const char *slash;
286 if (!strncmp (p, "bytes ", 6)) {
287 p += 6;
288 s->off = atoll(p);
289 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
290 s->filesize = atoll(slash+1);
291 }
292 h->is_streamed = 0; /* we _can_ in fact seek */
293 } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
294 h->is_streamed = 0;
295 } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
296 s->filesize = -1;
297 s->chunksize = 0;
298 } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
299 ff_http_auth_handle_header(&s->auth_state, tag, p);
300 } else if (!av_strcasecmp (tag, "Authentication-Info")) {
301 ff_http_auth_handle_header(&s->auth_state, tag, p);
302 } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
303 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
304 } else if (!av_strcasecmp (tag, "Connection")) {
305 if (!strcmp(p, "close"))
306 s->willclose = 1;
307 }
308 }
309 return 1;
310 }
311
312 static inline int has_header(const char *str, const char *header)
313 {
314 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
315 if (!str)
316 return 0;
317 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
318 }
319
320 static int http_connect(URLContext *h, const char *path, const char *local_path,
321 const char *hoststr, const char *auth,
322 const char *proxyauth, int *new_location)
323 {
324 HTTPContext *s = h->priv_data;
325 int post, err;
326 char line[1024];
327 char headers[1024] = "";
328 char *authstr = NULL, *proxyauthstr = NULL;
329 int64_t off = s->off;
330 int len = 0;
331 const char *method;
332
333
334 /* send http header */
335 post = h->flags & AVIO_FLAG_WRITE;
336 method = post ? "POST" : "GET";
337 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
338 method);
339 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
340 local_path, method);
341
342 /* set default headers if needed */
343 if (!has_header(s->headers, "\r\nUser-Agent: "))
344 len += av_strlcatf(headers + len, sizeof(headers) - len,
345 "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
346 if (!has_header(s->headers, "\r\nAccept: "))
347 len += av_strlcpy(headers + len, "Accept: */*\r\n",
348 sizeof(headers) - len);
349 if (!has_header(s->headers, "\r\nRange: ") && !post)
350 len += av_strlcatf(headers + len, sizeof(headers) - len,
351 "Range: bytes=%"PRId64"-\r\n", s->off);
352 if (!has_header(s->headers, "\r\nConnection: "))
353 len += av_strlcpy(headers + len, "Connection: close\r\n",
354 sizeof(headers)-len);
355 if (!has_header(s->headers, "\r\nHost: "))
356 len += av_strlcatf(headers + len, sizeof(headers) - len,
357 "Host: %s\r\n", hoststr);
358
359 /* now add in custom headers */
360 if (s->headers)
361 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
362
363 snprintf(s->buffer, sizeof(s->buffer),
364 "%s %s HTTP/1.1\r\n"
365 "%s"
366 "%s"
367 "%s"
368 "%s%s"
369 "\r\n",
370 method,
371 path,
372 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
373 headers,
374 authstr ? authstr : "",
375 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
376
377 av_freep(&authstr);
378 av_freep(&proxyauthstr);
379 if (ffurl_write(s->hd, s->buffer, strlen(s->buffer)) < 0)
380 return AVERROR(EIO);
381
382 /* init input buffer */
383 s->buf_ptr = s->buffer;
384 s->buf_end = s->buffer;
385 s->line_count = 0;
386 s->off = 0;
387 s->filesize = -1;
388 s->willclose = 0;
389 if (post) {
390 /* Pretend that it did work. We didn't read any header yet, since
391 * we've still to send the POST data, but the code calling this
392 * function will check http_code after we return. */
393 s->http_code = 200;
394 return 0;
395 }
396 s->chunksize = -1;
397
398 /* wait for header */
399 for(;;) {
400 if (http_get_line(s, line, sizeof(line)) < 0)
401 return AVERROR(EIO);
402
403 av_dlog(NULL, "header='%s'\n", line);
404
405 err = process_line(h, line, s->line_count, new_location);
406 if (err < 0)
407 return err;
408 if (err == 0)
409 break;
410 s->line_count++;
411 }
412
413 return (off == s->off) ? 0 : -1;
414 }
415
416
417 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
418 {
419 HTTPContext *s = h->priv_data;
420 int len;
421 /* read bytes from input buffer first */
422 len = s->buf_end - s->buf_ptr;
423 if (len > 0) {
424 if (len > size)
425 len = size;
426 memcpy(buf, s->buf_ptr, len);
427 s->buf_ptr += len;
428 } else {
429 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
430 return AVERROR_EOF;
431 len = ffurl_read(s->hd, buf, size);
432 }
433 if (len > 0) {
434 s->off += len;
435 if (s->chunksize > 0)
436 s->chunksize -= len;
437 }
438 return len;
439 }
440
441 static int http_read(URLContext *h, uint8_t *buf, int size)
442 {
443 HTTPContext *s = h->priv_data;
444
445 if (s->chunksize >= 0) {
446 if (!s->chunksize) {
447 char line[32];
448
449 for(;;) {
450 do {
451 if (http_get_line(s, line, sizeof(line)) < 0)
452 return AVERROR(EIO);
453 } while (!*line); /* skip CR LF from last chunk */
454
455 s->chunksize = strtoll(line, NULL, 16);
456
457 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
458
459 if (!s->chunksize)
460 return 0;
461 break;
462 }
463 }
464 size = FFMIN(size, s->chunksize);
465 }
466 return http_buf_read(h, buf, size);
467 }
468
469 /* used only when posting data */
470 static int http_write(URLContext *h, const uint8_t *buf, int size)
471 {
472 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
473 int ret;
474 char crlf[] = "\r\n";
475 HTTPContext *s = h->priv_data;
476
477 if (!s->chunked_post) {
478 /* non-chunked data is sent without any special encoding */
479 return ffurl_write(s->hd, buf, size);
480 }
481
482 /* silently ignore zero-size data since chunk encoding that would
483 * signal EOF */
484 if (size > 0) {
485 /* upload data using chunked encoding */
486 snprintf(temp, sizeof(temp), "%x\r\n", size);
487
488 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
489 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
490 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
491 return ret;
492 }
493 return size;
494 }
495
496 static int http_close(URLContext *h)
497 {
498 int ret = 0;
499 char footer[] = "0\r\n\r\n";
500 HTTPContext *s = h->priv_data;
501
502 /* signal end of chunked encoding if used */
503 if ((h->flags & AVIO_FLAG_WRITE) && s->chunked_post) {
504 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
505 ret = ret > 0 ? 0 : ret;
506 }
507
508 if (s->hd)
509 ffurl_close(s->hd);
510 return ret;
511 }
512
513 static int64_t http_seek(URLContext *h, int64_t off, int whence)
514 {
515 HTTPContext *s = h->priv_data;
516 URLContext *old_hd = s->hd;
517 int64_t old_off = s->off;
518 uint8_t old_buf[BUFFER_SIZE];
519 int old_buf_size;
520
521 if (whence == AVSEEK_SIZE)
522 return s->filesize;
523 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
524 return -1;
525
526 /* we save the old context in case the seek fails */
527 old_buf_size = s->buf_end - s->buf_ptr;
528 memcpy(old_buf, s->buf_ptr, old_buf_size);
529 s->hd = NULL;
530 if (whence == SEEK_CUR)
531 off += s->off;
532 else if (whence == SEEK_END)
533 off += s->filesize;
534 s->off = off;
535
536 /* if it fails, continue on old connection */
537 if (http_open_cnx(h) < 0) {
538 memcpy(s->buffer, old_buf, old_buf_size);
539 s->buf_ptr = s->buffer;
540 s->buf_end = s->buffer + old_buf_size;
541 s->hd = old_hd;
542 s->off = old_off;
543 return -1;
544 }
545 ffurl_close(old_hd);
546 return off;
547 }
548
549 static int
550 http_get_file_handle(URLContext *h)
551 {
552 HTTPContext *s = h->priv_data;
553 return ffurl_get_file_handle(s->hd);
554 }
555
556 #if CONFIG_HTTP_PROTOCOL
557 URLProtocol ff_http_protocol = {
558 .name = "http",
559 .url_open = http_open,
560 .url_read = http_read,
561 .url_write = http_write,
562 .url_seek = http_seek,
563 .url_close = http_close,
564 .url_get_file_handle = http_get_file_handle,
565 .priv_data_size = sizeof(HTTPContext),
566 .priv_data_class = &http_context_class,
567 };
568 #endif
569 #if CONFIG_HTTPS_PROTOCOL
570 URLProtocol ff_https_protocol = {
571 .name = "https",
572 .url_open = http_open,
573 .url_read = http_read,
574 .url_write = http_write,
575 .url_seek = http_seek,
576 .url_close = http_close,
577 .url_get_file_handle = http_get_file_handle,
578 .priv_data_size = sizeof(HTTPContext),
579 .priv_data_class = &https_context_class,
580 };
581 #endif
582
583 #if CONFIG_HTTPPROXY_PROTOCOL
584 static int http_proxy_close(URLContext *h)
585 {
586 HTTPContext *s = h->priv_data;
587 if (s->hd)
588 ffurl_close(s->hd);
589 return 0;
590 }
591
592 static int http_proxy_open(URLContext *h, const char *uri, int flags)
593 {
594 HTTPContext *s = h->priv_data;
595 char hostname[1024], hoststr[1024];
596 char auth[1024], pathbuf[1024], *path;
597 char line[1024], lower_url[100];
598 int port, ret = 0;
599 HTTPAuthType cur_auth_type;
600 char *authstr;
601
602 h->is_streamed = 1;
603
604 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
605 pathbuf, sizeof(pathbuf), uri);
606 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
607 path = pathbuf;
608 if (*path == '/')
609 path++;
610
611 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
612 NULL);
613 redo:
614 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
615 &h->interrupt_callback, NULL);
616 if (ret < 0)
617 return ret;
618
619 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
620 path, "CONNECT");
621 snprintf(s->buffer, sizeof(s->buffer),
622 "CONNECT %s HTTP/1.1\r\n"
623 "Host: %s\r\n"
624 "Connection: close\r\n"
625 "%s%s"
626 "\r\n",
627 path,
628 hoststr,
629 authstr ? "Proxy-" : "", authstr ? authstr : "");
630 av_freep(&authstr);
631
632 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
633 goto fail;
634
635 s->buf_ptr = s->buffer;
636 s->buf_end = s->buffer;
637 s->line_count = 0;
638 s->filesize = -1;
639 cur_auth_type = s->proxy_auth_state.auth_type;
640
641 for (;;) {
642 int new_loc;
643 // Note: This uses buffering, potentially reading more than the
644 // HTTP header. If tunneling a protocol where the server starts
645 // the conversation, we might buffer part of that here, too.
646 // Reading that requires using the proper ffurl_read() function
647 // on this URLContext, not using the fd directly (as the tls
648 // protocol does). This shouldn't be an issue for tls though,
649 // since the client starts the conversation there, so there
650 // is no extra data that we might buffer up here.
651 if (http_get_line(s, line, sizeof(line)) < 0) {
652 ret = AVERROR(EIO);
653 goto fail;
654 }
655
656 av_dlog(h, "header='%s'\n", line);
657
658 ret = process_line(h, line, s->line_count, &new_loc);
659 if (ret < 0)
660 goto fail;
661 if (ret == 0)
662 break;
663 s->line_count++;
664 }
665 if (s->http_code == 407 && cur_auth_type == HTTP_AUTH_NONE &&
666 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE) {
667 ffurl_close(s->hd);
668 s->hd = NULL;
669 goto redo;
670 }
671
672 if (s->http_code < 400)
673 return 0;
674 ret = AVERROR(EIO);
675
676 fail:
677 http_proxy_close(h);
678 return ret;
679 }
680
681 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
682 {
683 HTTPContext *s = h->priv_data;
684 return ffurl_write(s->hd, buf, size);
685 }
686
687 URLProtocol ff_httpproxy_protocol = {
688 .name = "httpproxy",
689 .url_open = http_proxy_open,
690 .url_read = http_buf_read,
691 .url_write = http_proxy_write,
692 .url_close = http_proxy_close,
693 .url_get_file_handle = http_get_file_handle,
694 .priv_data_size = sizeof(HTTPContext),
695 };
696 #endif