2 * HTTP protocol for avconv client
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
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.
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.
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
22 #include "libavutil/avstring.h"
27 #include "os_support.h"
30 #include "libavutil/opt.h"
36 /* XXX: POST protocol is not completely implemented because avconv uses
37 only a subset of it. */
39 /* The IO buffer size is unrelated to the max URL size in itself, but needs
40 * to be large enough to fit the full request headers (including long
43 #define BUFFER_SIZE MAX_URL_SIZE
44 #define MAX_REDIRECTS 8
49 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
52 int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
53 int64_t off, filesize;
54 char location[MAX_URL_SIZE];
55 HTTPAuthState auth_state;
56 HTTPAuthState proxy_auth_state;
58 int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
60 int end_chunked_post; /**< A flag which indicates if the end of chunked encoding has been sent. */
61 int end_header; /**< A flag which indicates we have finished to read POST reply. */
62 int multiple_requests; /**< A flag which indicates if we use persistent connections. */
67 z_stream inflate_stream;
68 uint8_t *inflate_buffer;
70 AVDictionary *chained_options;
74 #define OFFSET(x) offsetof(HTTPContext, x)
75 #define D AV_OPT_FLAG_DECODING_PARAM
76 #define E AV_OPT_FLAG_ENCODING_PARAM
77 static const AVOption options[] = {
78 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
79 {"headers", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
80 {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
81 {"post_data", "custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
82 {"auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, {.i64 = HTTP_AUTH_NONE}, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D|E, "auth_type" },
83 {"none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_NONE}, 0, 0, D|E, "auth_type" },
84 {"basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_BASIC}, 0, 0, D|E, "auth_type" },
85 {"send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E, "auth_type" },
88 #define HTTP_CLASS(flavor)\
89 static const AVClass flavor ## _context_class = {\
90 .class_name = #flavor,\
91 .item_name = av_default_item_name,\
93 .version = LIBAVUTIL_VERSION_INT,\
99 static int http_connect(URLContext *h, const char *path, const char *local_path,
100 const char *hoststr, const char *auth,
101 const char *proxyauth, int *new_location);
103 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
105 memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
106 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
107 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
108 &((HTTPContext*)src->priv_data)->proxy_auth_state,
109 sizeof(HTTPAuthState));
112 /* return non zero if error */
113 static int http_open_cnx(URLContext *h, AVDictionary **options)
115 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
116 char hostname[1024], hoststr[1024], proto[10];
117 char auth[1024], proxyauth[1024] = "";
118 char path1[MAX_URL_SIZE];
119 char buf[1024], urlbuf[MAX_URL_SIZE];
120 int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0;
121 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
122 HTTPContext *s = h->priv_data;
124 /* fill the dest addr */
126 /* needed in any case to build the host string */
127 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
128 hostname, sizeof(hostname), &port,
129 path1, sizeof(path1), s->location);
130 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
132 proxy_path = getenv("http_proxy");
133 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
134 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);
136 if (!strcmp(proto, "https")) {
145 if (path1[0] == '\0')
151 /* Reassemble the request URL without auth string - we don't
152 * want to leak the auth to the proxy. */
153 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
156 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
157 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
160 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
163 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
164 &h->interrupt_callback, options);
169 cur_auth_type = s->auth_state.auth_type;
170 cur_proxy_auth_type = s->auth_state.auth_type;
171 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
174 if (s->http_code == 401) {
175 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
176 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
183 if (s->http_code == 407) {
184 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
185 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
192 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
193 && location_changed == 1) {
194 /* url moved, get next */
197 if (redirects++ >= MAX_REDIRECTS)
199 /* Restart the authentication process with the new target, which
200 * might use a different auth mechanism. */
201 memset(&s->auth_state, 0, sizeof(s->auth_state));
203 location_changed = 0;
214 int ff_http_do_new_request(URLContext *h, const char *uri)
216 HTTPContext *s = h->priv_data;
217 AVDictionary *options = NULL;
221 av_strlcpy(s->location, uri, sizeof(s->location));
223 av_dict_copy(&options, s->chained_options, 0);
224 ret = http_open_cnx(h, &options);
225 av_dict_free(&options);
229 static int http_open(URLContext *h, const char *uri, int flags,
230 AVDictionary **options)
232 HTTPContext *s = h->priv_data;
238 av_strlcpy(s->location, uri, sizeof(s->location));
240 av_dict_copy(&s->chained_options, *options, 0);
243 int len = strlen(s->headers);
244 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
245 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
248 ret = http_open_cnx(h, options);
250 av_dict_free(&s->chained_options);
253 static int http_getc(HTTPContext *s)
256 if (s->buf_ptr >= s->buf_end) {
257 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
260 } else if (len == 0) {
263 s->buf_ptr = s->buffer;
264 s->buf_end = s->buffer + len;
267 return *s->buf_ptr++;
270 static int http_get_line(HTTPContext *s, char *line, int line_size)
282 if (q > line && q[-1] == '\r')
288 if ((q - line) < line_size - 1)
294 static int process_line(URLContext *h, char *line, int line_count,
297 HTTPContext *s = h->priv_data;
301 if (line[0] == '\0') {
307 if (line_count == 0) {
308 while (!av_isspace(*p) && *p != '\0')
310 while (av_isspace(*p))
312 s->http_code = strtol(p, &end, 10);
314 av_dlog(NULL, "http_code=%d\n", s->http_code);
316 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
317 * don't abort until all headers have been parsed. */
318 if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
319 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
320 (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
321 end += strspn(end, SPACE_CHARS);
322 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
327 while (*p != '\0' && *p != ':')
335 while (av_isspace(*p))
337 if (!av_strcasecmp(tag, "Location")) {
338 av_strlcpy(s->location, p, sizeof(s->location));
340 } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
341 s->filesize = strtoll(p, NULL, 10);
342 } else if (!av_strcasecmp (tag, "Content-Range")) {
343 /* "bytes $from-$to/$document_size" */
345 if (!strncmp (p, "bytes ", 6)) {
347 s->off = strtoll(p, NULL, 10);
348 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
349 s->filesize = strtoll(slash+1, NULL, 10);
351 h->is_streamed = 0; /* we _can_ in fact seek */
352 } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
354 } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
357 } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
358 ff_http_auth_handle_header(&s->auth_state, tag, p);
359 } else if (!av_strcasecmp (tag, "Authentication-Info")) {
360 ff_http_auth_handle_header(&s->auth_state, tag, p);
361 } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
362 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
363 } else if (!av_strcasecmp (tag, "Connection")) {
364 if (!strcmp(p, "close"))
366 } else if (!av_strcasecmp (tag, "Content-Encoding")) {
367 if (!av_strncasecmp(p, "gzip", 4) || !av_strncasecmp(p, "deflate", 7)) {
370 inflateEnd(&s->inflate_stream);
371 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
372 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
373 s->inflate_stream.msg);
374 return AVERROR(ENOSYS);
376 if (zlibCompileFlags() & (1 << 17)) {
377 av_log(h, AV_LOG_WARNING, "Your zlib was compiled without gzip support.\n");
378 return AVERROR(ENOSYS);
381 av_log(h, AV_LOG_WARNING, "Compressed (%s) content, need zlib with gzip support\n", p);
382 return AVERROR(ENOSYS);
384 } else if (!av_strncasecmp(p, "identity", 8)) {
385 // The normal, no-encoding case (although servers shouldn't include
386 // the header at all if this is the case).
388 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
389 return AVERROR(ENOSYS);
396 static inline int has_header(const char *str, const char *header)
398 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
401 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
404 static int http_read_header(URLContext *h, int *new_location)
406 HTTPContext *s = h->priv_data;
407 char line[MAX_URL_SIZE];
413 if ((err = http_get_line(s, line, sizeof(line))) < 0)
416 av_dlog(NULL, "header='%s'\n", line);
418 err = process_line(h, line, s->line_count, new_location);
429 static int http_connect(URLContext *h, const char *path, const char *local_path,
430 const char *hoststr, const char *auth,
431 const char *proxyauth, int *new_location)
433 HTTPContext *s = h->priv_data;
435 char headers[1024] = "";
436 char *authstr = NULL, *proxyauthstr = NULL;
437 int64_t off = s->off;
440 int send_expect_100 = 0;
443 /* send http header */
444 post = h->flags & AVIO_FLAG_WRITE;
447 /* force POST method and disable chunked encoding when
448 * custom HTTP post data is set */
453 method = post ? "POST" : "GET";
454 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
456 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
458 if (post && !s->post_data) {
459 send_expect_100 = s->send_expect_100;
460 /* The user has supplied authentication but we don't know the auth type,
461 * send Expect: 100-continue to get the 401 response including the
462 * WWW-Authenticate header, or an 100 continue if no auth actually
464 if (auth && s->auth_state.auth_type == HTTP_AUTH_NONE &&
469 /* set default headers if needed */
470 if (!has_header(s->headers, "\r\nUser-Agent: "))
471 len += av_strlcatf(headers + len, sizeof(headers) - len,
472 "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
473 if (!has_header(s->headers, "\r\nAccept: "))
474 len += av_strlcpy(headers + len, "Accept: */*\r\n",
475 sizeof(headers) - len);
476 if (!has_header(s->headers, "\r\nRange: ") && !post)
477 len += av_strlcatf(headers + len, sizeof(headers) - len,
478 "Range: bytes=%"PRId64"-\r\n", s->off);
479 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
480 len += av_strlcatf(headers + len, sizeof(headers) - len,
481 "Expect: 100-continue\r\n");
483 if (!has_header(s->headers, "\r\nConnection: ")) {
484 if (s->multiple_requests) {
485 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
486 sizeof(headers) - len);
488 len += av_strlcpy(headers + len, "Connection: close\r\n",
489 sizeof(headers) - len);
493 if (!has_header(s->headers, "\r\nHost: "))
494 len += av_strlcatf(headers + len, sizeof(headers) - len,
495 "Host: %s\r\n", hoststr);
496 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
497 len += av_strlcatf(headers + len, sizeof(headers) - len,
498 "Content-Length: %d\r\n", s->post_datalen);
500 /* now add in custom headers */
502 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
504 snprintf(s->buffer, sizeof(s->buffer),
513 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
515 authstr ? authstr : "",
516 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
519 av_freep(&proxyauthstr);
520 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
524 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
527 /* init input buffer */
528 s->buf_ptr = s->buffer;
529 s->buf_end = s->buffer;
534 s->end_chunked_post = 0;
536 if (post && !s->post_data && !send_expect_100) {
537 /* Pretend that it did work. We didn't read any header yet, since
538 * we've still to send the POST data, but the code calling this
539 * function will check http_code after we return. */
544 /* wait for header */
545 err = http_read_header(h, new_location);
549 return (off == s->off) ? 0 : -1;
553 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
555 HTTPContext *s = h->priv_data;
557 /* read bytes from input buffer first */
558 len = s->buf_end - s->buf_ptr;
562 memcpy(buf, s->buf_ptr, len);
565 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
567 len = ffurl_read(s->hd, buf, size);
571 if (s->chunksize > 0)
578 #define DECOMPRESS_BUF_SIZE (256 * 1024)
579 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
581 HTTPContext *s = h->priv_data;
584 if (!s->inflate_buffer) {
585 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
586 if (!s->inflate_buffer)
587 return AVERROR(ENOMEM);
590 if (s->inflate_stream.avail_in == 0) {
591 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
594 s->inflate_stream.next_in = s->inflate_buffer;
595 s->inflate_stream.avail_in = read;
598 s->inflate_stream.avail_out = size;
599 s->inflate_stream.next_out = buf;
601 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
602 if (ret != Z_OK && ret != Z_STREAM_END)
603 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", ret, s->inflate_stream.msg);
605 return size - s->inflate_stream.avail_out;
609 static int http_read(URLContext *h, uint8_t *buf, int size)
611 HTTPContext *s = h->priv_data;
612 int err, new_location;
617 if (s->end_chunked_post && !s->end_header) {
618 err = http_read_header(h, &new_location);
623 if (s->chunksize >= 0) {
629 if ((err = http_get_line(s, line, sizeof(line))) < 0)
631 } while (!*line); /* skip CR LF from last chunk */
633 s->chunksize = strtoll(line, NULL, 16);
635 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
642 size = FFMIN(size, s->chunksize);
646 return http_buf_read_compressed(h, buf, size);
648 return http_buf_read(h, buf, size);
651 /* used only when posting data */
652 static int http_write(URLContext *h, const uint8_t *buf, int size)
654 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
656 char crlf[] = "\r\n";
657 HTTPContext *s = h->priv_data;
659 if (!s->chunked_post) {
660 /* non-chunked data is sent without any special encoding */
661 return ffurl_write(s->hd, buf, size);
664 /* silently ignore zero-size data since chunk encoding that would
667 /* upload data using chunked encoding */
668 snprintf(temp, sizeof(temp), "%x\r\n", size);
670 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
671 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
672 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
678 static int http_shutdown(URLContext *h, int flags)
681 char footer[] = "0\r\n\r\n";
682 HTTPContext *s = h->priv_data;
684 /* signal end of chunked encoding if used */
685 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
686 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
687 ret = ret > 0 ? 0 : ret;
688 s->end_chunked_post = 1;
694 static int http_close(URLContext *h)
697 HTTPContext *s = h->priv_data;
700 inflateEnd(&s->inflate_stream);
701 av_freep(&s->inflate_buffer);
704 if (!s->end_chunked_post) {
705 /* Close the write direction by sending the end of chunked encoding. */
706 ret = http_shutdown(h, h->flags);
711 av_dict_free(&s->chained_options);
715 static int64_t http_seek(URLContext *h, int64_t off, int whence)
717 HTTPContext *s = h->priv_data;
718 URLContext *old_hd = s->hd;
719 int64_t old_off = s->off;
720 uint8_t old_buf[BUFFER_SIZE];
722 AVDictionary *options = NULL;
724 if (whence == AVSEEK_SIZE)
726 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
729 /* we save the old context in case the seek fails */
730 old_buf_size = s->buf_end - s->buf_ptr;
731 memcpy(old_buf, s->buf_ptr, old_buf_size);
733 if (whence == SEEK_CUR)
735 else if (whence == SEEK_END)
739 /* if it fails, continue on old connection */
740 av_dict_copy(&options, s->chained_options, 0);
741 if (http_open_cnx(h, &options) < 0) {
742 av_dict_free(&options);
743 memcpy(s->buffer, old_buf, old_buf_size);
744 s->buf_ptr = s->buffer;
745 s->buf_end = s->buffer + old_buf_size;
750 av_dict_free(&options);
756 http_get_file_handle(URLContext *h)
758 HTTPContext *s = h->priv_data;
759 return ffurl_get_file_handle(s->hd);
762 #if CONFIG_HTTP_PROTOCOL
763 URLProtocol ff_http_protocol = {
765 .url_open2 = http_open,
766 .url_read = http_read,
767 .url_write = http_write,
768 .url_seek = http_seek,
769 .url_close = http_close,
770 .url_get_file_handle = http_get_file_handle,
771 .url_shutdown = http_shutdown,
772 .priv_data_size = sizeof(HTTPContext),
773 .priv_data_class = &http_context_class,
774 .flags = URL_PROTOCOL_FLAG_NETWORK,
777 #if CONFIG_HTTPS_PROTOCOL
778 URLProtocol ff_https_protocol = {
780 .url_open2 = http_open,
781 .url_read = http_read,
782 .url_write = http_write,
783 .url_seek = http_seek,
784 .url_close = http_close,
785 .url_get_file_handle = http_get_file_handle,
786 .url_shutdown = http_shutdown,
787 .priv_data_size = sizeof(HTTPContext),
788 .priv_data_class = &https_context_class,
789 .flags = URL_PROTOCOL_FLAG_NETWORK,
793 #if CONFIG_HTTPPROXY_PROTOCOL
794 static int http_proxy_close(URLContext *h)
796 HTTPContext *s = h->priv_data;
802 static int http_proxy_open(URLContext *h, const char *uri, int flags)
804 HTTPContext *s = h->priv_data;
805 char hostname[1024], hoststr[1024];
806 char auth[1024], pathbuf[1024], *path;
808 int port, ret = 0, attempts = 0;
809 HTTPAuthType cur_auth_type;
815 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
816 pathbuf, sizeof(pathbuf), uri);
817 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
822 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
825 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
826 &h->interrupt_callback, NULL);
830 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
832 snprintf(s->buffer, sizeof(s->buffer),
833 "CONNECT %s HTTP/1.1\r\n"
835 "Connection: close\r\n"
840 authstr ? "Proxy-" : "", authstr ? authstr : "");
843 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
846 s->buf_ptr = s->buffer;
847 s->buf_end = s->buffer;
850 cur_auth_type = s->proxy_auth_state.auth_type;
852 /* Note: This uses buffering, potentially reading more than the
853 * HTTP header. If tunneling a protocol where the server starts
854 * the conversation, we might buffer part of that here, too.
855 * Reading that requires using the proper ffurl_read() function
856 * on this URLContext, not using the fd directly (as the tls
857 * protocol does). This shouldn't be an issue for tls though,
858 * since the client starts the conversation there, so there
859 * is no extra data that we might buffer up here.
861 ret = http_read_header(h, &new_loc);
866 if (s->http_code == 407 &&
867 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
868 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
874 if (s->http_code < 400)
883 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
885 HTTPContext *s = h->priv_data;
886 return ffurl_write(s->hd, buf, size);
889 URLProtocol ff_httpproxy_protocol = {
891 .url_open = http_proxy_open,
892 .url_read = http_buf_read,
893 .url_write = http_proxy_write,
894 .url_close = http_proxy_close,
895 .url_get_file_handle = http_get_file_handle,
896 .priv_data_size = sizeof(HTTPContext),
897 .flags = URL_PROTOCOL_FLAG_NETWORK,