yading@11: /*
yading@11:  * HTTP protocol for ffmpeg client
yading@11:  * Copyright (c) 2000, 2001 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/avstring.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "network.h"
yading@11: #include "http.h"
yading@11: #include "os_support.h"
yading@11: #include "httpauth.h"
yading@11: #include "url.h"
yading@11: #include "libavutil/opt.h"
yading@11: 
yading@11: /* XXX: POST protocol is not completely implemented because ffmpeg uses
yading@11:    only a subset of it. */
yading@11: 
yading@11: /* The IO buffer size is unrelated to the max URL size in itself, but needs
yading@11:  * to be large enough to fit the full request headers (including long
yading@11:  * path names).
yading@11:  */
yading@11: #define BUFFER_SIZE MAX_URL_SIZE
yading@11: #define MAX_REDIRECTS 8
yading@11: 
yading@11: typedef struct {
yading@11:     const AVClass *class;
yading@11:     URLContext *hd;
yading@11:     unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
yading@11:     int line_count;
yading@11:     int http_code;
yading@11:     int64_t chunksize;      /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
yading@11:     char *content_type;
yading@11:     char *user_agent;
yading@11:     int64_t off, filesize;
yading@11:     char location[MAX_URL_SIZE];
yading@11:     HTTPAuthState auth_state;
yading@11:     HTTPAuthState proxy_auth_state;
yading@11:     char *headers;
yading@11:     int willclose;          /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
yading@11:     int seekable;           /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
yading@11:     int chunked_post;
yading@11:     int end_chunked_post;   /**< A flag which indicates if the end of chunked encoding has been sent. */
yading@11:     int end_header;         /**< A flag which indicates we have finished to read POST reply. */
yading@11:     int multiple_requests;  /**< A flag which indicates if we use persistent connections. */
yading@11:     uint8_t *post_data;
yading@11:     int post_datalen;
yading@11:     int is_akamai;
yading@11:     int rw_timeout;
yading@11:     char *mime_type;
yading@11:     char *cookies;          ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
yading@11: } HTTPContext;
yading@11: 
yading@11: #define OFFSET(x) offsetof(HTTPContext, x)
yading@11: #define D AV_OPT_FLAG_DECODING_PARAM
yading@11: #define E AV_OPT_FLAG_ENCODING_PARAM
yading@11: #define DEFAULT_USER_AGENT "Mozilla/5.0 Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
yading@11: static const AVOption options[] = {
yading@11: {"seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, D },
yading@11: {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
yading@11: {"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
yading@11: {"content_type", "force a content type", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
yading@11: {"user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
yading@11: {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
yading@11: {"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
yading@11: {"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
yading@11: {"mime_type", "set MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 },
yading@11: {"cookies", "set cookies to be sent in applicable future requests, use newline delimited Set-Cookie HTTP field value syntax", OFFSET(cookies), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 },
yading@11: {NULL}
yading@11: };
yading@11: #define HTTP_CLASS(flavor)\
yading@11: static const AVClass flavor ## _context_class = {\
yading@11:     .class_name     = #flavor,\
yading@11:     .item_name      = av_default_item_name,\
yading@11:     .option         = options,\
yading@11:     .version        = LIBAVUTIL_VERSION_INT,\
yading@11: }
yading@11: 
yading@11: HTTP_CLASS(http);
yading@11: HTTP_CLASS(https);
yading@11: 
yading@11: static int http_connect(URLContext *h, const char *path, const char *local_path,
yading@11:                         const char *hoststr, const char *auth,
yading@11:                         const char *proxyauth, int *new_location);
yading@11: 
yading@11: void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
yading@11: {
yading@11:     memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
yading@11:            &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
yading@11:     memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
yading@11:            &((HTTPContext*)src->priv_data)->proxy_auth_state,
yading@11:            sizeof(HTTPAuthState));
yading@11: }
yading@11: 
yading@11: /* return non zero if error */
yading@11: static int http_open_cnx(URLContext *h)
yading@11: {
yading@11:     const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
yading@11:     char hostname[1024], hoststr[1024], proto[10];
yading@11:     char auth[1024], proxyauth[1024] = "";
yading@11:     char path1[MAX_URL_SIZE];
yading@11:     char buf[1024], urlbuf[MAX_URL_SIZE];
yading@11:     int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0;
yading@11:     HTTPAuthType cur_auth_type, cur_proxy_auth_type;
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     /* fill the dest addr */
yading@11:  redo:
yading@11:     /* needed in any case to build the host string */
yading@11:     av_url_split(proto, sizeof(proto), auth, sizeof(auth),
yading@11:                  hostname, sizeof(hostname), &port,
yading@11:                  path1, sizeof(path1), s->location);
yading@11:     ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
yading@11: 
yading@11:     proxy_path = getenv("http_proxy");
yading@11:     use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
yading@11:                 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);
yading@11: 
yading@11:     if (!strcmp(proto, "https")) {
yading@11:         lower_proto = "tls";
yading@11:         use_proxy = 0;
yading@11:         if (port < 0)
yading@11:             port = 443;
yading@11:     }
yading@11:     if (port < 0)
yading@11:         port = 80;
yading@11: 
yading@11:     if (path1[0] == '\0')
yading@11:         path = "/";
yading@11:     else
yading@11:         path = path1;
yading@11:     local_path = path;
yading@11:     if (use_proxy) {
yading@11:         /* Reassemble the request URL without auth string - we don't
yading@11:          * want to leak the auth to the proxy. */
yading@11:         ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
yading@11:                     path1);
yading@11:         path = urlbuf;
yading@11:         av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
yading@11:                      hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
yading@11:     }
yading@11: 
yading@11:     ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
yading@11: 
yading@11:     if (!s->hd) {
yading@11:         AVDictionary *opts = NULL;
yading@11:         char opts_format[20];
yading@11:         if (s->rw_timeout != -1) {
yading@11:             snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
yading@11:             av_dict_set(&opts, "timeout", opts_format, 0);
yading@11:         } /* if option is not given, don't pass it and let tcp use its own default */
yading@11:         err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
yading@11:                          &h->interrupt_callback, &opts);
yading@11:         av_dict_free(&opts);
yading@11:         if (err < 0)
yading@11:             goto fail;
yading@11:     }
yading@11: 
yading@11:     cur_auth_type = s->auth_state.auth_type;
yading@11:     cur_proxy_auth_type = s->auth_state.auth_type;
yading@11:     if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
yading@11:         goto fail;
yading@11:     attempts++;
yading@11:     if (s->http_code == 401) {
yading@11:         if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
yading@11:             s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
yading@11:             ffurl_closep(&s->hd);
yading@11:             goto redo;
yading@11:         } else
yading@11:             goto fail;
yading@11:     }
yading@11:     if (s->http_code == 407) {
yading@11:         if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
yading@11:             s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
yading@11:             ffurl_closep(&s->hd);
yading@11:             goto redo;
yading@11:         } else
yading@11:             goto fail;
yading@11:     }
yading@11:     if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
yading@11:         && location_changed == 1) {
yading@11:         /* url moved, get next */
yading@11:         ffurl_closep(&s->hd);
yading@11:         if (redirects++ >= MAX_REDIRECTS)
yading@11:             return AVERROR(EIO);
yading@11:         /* Restart the authentication process with the new target, which
yading@11:          * might use a different auth mechanism. */
yading@11:         memset(&s->auth_state, 0, sizeof(s->auth_state));
yading@11:         attempts = 0;
yading@11:         location_changed = 0;
yading@11:         goto redo;
yading@11:     }
yading@11:     return 0;
yading@11:  fail:
yading@11:     if (s->hd)
yading@11:         ffurl_closep(&s->hd);
yading@11:     return AVERROR(EIO);
yading@11: }
yading@11: 
yading@11: int ff_http_do_new_request(URLContext *h, const char *uri)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     s->off = 0;
yading@11:     av_strlcpy(s->location, uri, sizeof(s->location));
yading@11: 
yading@11:     return http_open_cnx(h);
yading@11: }
yading@11: 
yading@11: static int http_open(URLContext *h, const char *uri, int flags)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     if( s->seekable == 1 )
yading@11:         h->is_streamed = 0;
yading@11:     else
yading@11:         h->is_streamed = 1;
yading@11: 
yading@11:     s->filesize = -1;
yading@11:     av_strlcpy(s->location, uri, sizeof(s->location));
yading@11: 
yading@11:     if (s->headers) {
yading@11:         int len = strlen(s->headers);
yading@11:         if (len < 2 || strcmp("\r\n", s->headers + len - 2))
yading@11:             av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
yading@11:     }
yading@11: 
yading@11:     return http_open_cnx(h);
yading@11: }
yading@11: static int http_getc(HTTPContext *s)
yading@11: {
yading@11:     int len;
yading@11:     if (s->buf_ptr >= s->buf_end) {
yading@11:         len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
yading@11:         if (len < 0) {
yading@11:             return len;
yading@11:         } else if (len == 0) {
yading@11:             return -1;
yading@11:         } else {
yading@11:             s->buf_ptr = s->buffer;
yading@11:             s->buf_end = s->buffer + len;
yading@11:         }
yading@11:     }
yading@11:     return *s->buf_ptr++;
yading@11: }
yading@11: 
yading@11: static int http_get_line(HTTPContext *s, char *line, int line_size)
yading@11: {
yading@11:     int ch;
yading@11:     char *q;
yading@11: 
yading@11:     q = line;
yading@11:     for(;;) {
yading@11:         ch = http_getc(s);
yading@11:         if (ch < 0)
yading@11:             return ch;
yading@11:         if (ch == '\n') {
yading@11:             /* process line */
yading@11:             if (q > line && q[-1] == '\r')
yading@11:                 q--;
yading@11:             *q = '\0';
yading@11: 
yading@11:             return 0;
yading@11:         } else {
yading@11:             if ((q - line) < line_size - 1)
yading@11:                 *q++ = ch;
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int process_line(URLContext *h, char *line, int line_count,
yading@11:                         int *new_location)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     char *tag, *p, *end;
yading@11: 
yading@11:     /* end of header */
yading@11:     if (line[0] == '\0') {
yading@11:         s->end_header = 1;
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     p = line;
yading@11:     if (line_count == 0) {
yading@11:         while (!av_isspace(*p) && *p != '\0')
yading@11:             p++;
yading@11:         while (av_isspace(*p))
yading@11:             p++;
yading@11:         s->http_code = strtol(p, &end, 10);
yading@11: 
yading@11:         av_dlog(NULL, "http_code=%d\n", s->http_code);
yading@11: 
yading@11:         /* error codes are 4xx and 5xx, but regard 401 as a success, so we
yading@11:          * don't abort until all headers have been parsed. */
yading@11:         if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
yading@11:             || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
yading@11:             (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
yading@11:             end += strspn(end, SPACE_CHARS);
yading@11:             av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
yading@11:                    s->http_code, end);
yading@11:             return -1;
yading@11:         }
yading@11:     } else {
yading@11:         while (*p != '\0' && *p != ':')
yading@11:             p++;
yading@11:         if (*p != ':')
yading@11:             return 1;
yading@11: 
yading@11:         *p = '\0';
yading@11:         tag = line;
yading@11:         p++;
yading@11:         while (av_isspace(*p))
yading@11:             p++;
yading@11:         if (!av_strcasecmp(tag, "Location")) {
yading@11:             av_strlcpy(s->location, p, sizeof(s->location));
yading@11:             *new_location = 1;
yading@11:         } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
yading@11:             s->filesize = strtoll(p, NULL, 10);
yading@11:         } else if (!av_strcasecmp (tag, "Content-Range")) {
yading@11:             /* "bytes $from-$to/$document_size" */
yading@11:             const char *slash;
yading@11:             if (!strncmp (p, "bytes ", 6)) {
yading@11:                 p += 6;
yading@11:                 s->off = strtoll(p, NULL, 10);
yading@11:                 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
yading@11:                     s->filesize = strtoll(slash+1, NULL, 10);
yading@11:             }
yading@11:             if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
yading@11:                 h->is_streamed = 0; /* we _can_ in fact seek */
yading@11:         } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5) && s->seekable == -1) {
yading@11:             h->is_streamed = 0;
yading@11:         } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
yading@11:             s->filesize = -1;
yading@11:             s->chunksize = 0;
yading@11:         } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
yading@11:             ff_http_auth_handle_header(&s->auth_state, tag, p);
yading@11:         } else if (!av_strcasecmp (tag, "Authentication-Info")) {
yading@11:             ff_http_auth_handle_header(&s->auth_state, tag, p);
yading@11:         } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
yading@11:             ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
yading@11:         } else if (!av_strcasecmp (tag, "Connection")) {
yading@11:             if (!strcmp(p, "close"))
yading@11:                 s->willclose = 1;
yading@11:         } else if (!av_strcasecmp (tag, "Server") && !av_strcasecmp (p, "AkamaiGHost")) {
yading@11:             s->is_akamai = 1;
yading@11:         } else if (!av_strcasecmp (tag, "Content-Type")) {
yading@11:             av_free(s->mime_type); s->mime_type = av_strdup(p);
yading@11:         } else if (!av_strcasecmp (tag, "Set-Cookie")) {
yading@11:             if (!s->cookies) {
yading@11:                 if (!(s->cookies = av_strdup(p)))
yading@11:                     return AVERROR(ENOMEM);
yading@11:             } else {
yading@11:                 char *tmp = s->cookies;
yading@11:                 size_t str_size = strlen(tmp) + strlen(p) + 2;
yading@11:                 if (!(s->cookies = av_malloc(str_size))) {
yading@11:                     s->cookies = tmp;
yading@11:                     return AVERROR(ENOMEM);
yading@11:                 }
yading@11:                 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
yading@11:                 av_free(tmp);
yading@11:             }
yading@11:         }
yading@11:     }
yading@11:     return 1;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Create a string containing cookie values for use as a HTTP cookie header
yading@11:  * field value for a particular path and domain from the cookie values stored in
yading@11:  * the HTTP protocol context. The cookie string is stored in *cookies.
yading@11:  *
yading@11:  * @return a negative value if an error condition occurred, 0 otherwise
yading@11:  */
yading@11: static int get_cookies(HTTPContext *s, char **cookies, const char *path,
yading@11:                        const char *domain)
yading@11: {
yading@11:     // cookie strings will look like Set-Cookie header field values.  Multiple
yading@11:     // Set-Cookie fields will result in multiple values delimited by a newline
yading@11:     int ret = 0;
yading@11:     char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
yading@11: 
yading@11:     if (!set_cookies) return AVERROR(EINVAL);
yading@11: 
yading@11:     *cookies = NULL;
yading@11:     while ((cookie = av_strtok(set_cookies, "\n", &next))) {
yading@11:         int domain_offset = 0;
yading@11:         char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
yading@11:         set_cookies = NULL;
yading@11: 
yading@11:         while ((param = av_strtok(cookie, "; ", &next_param))) {
yading@11:             cookie = NULL;
yading@11:             if        (!av_strncasecmp("path=",   param, 5)) {
yading@11:                 av_free(cpath);
yading@11:                 cpath = av_strdup(&param[5]);
yading@11:             } else if (!av_strncasecmp("domain=", param, 7)) {
yading@11:                 av_free(cdomain);
yading@11:                 cdomain = av_strdup(&param[7]);
yading@11:             } else if (!av_strncasecmp("secure",  param, 6) ||
yading@11:                        !av_strncasecmp("comment", param, 7) ||
yading@11:                        !av_strncasecmp("max-age", param, 7) ||
yading@11:                        !av_strncasecmp("version", param, 7)) {
yading@11:                 // ignore Comment, Max-Age, Secure and Version
yading@11:             } else {
yading@11:                 av_free(cvalue);
yading@11:                 cvalue = av_strdup(param);
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         // ensure all of the necessary values are valid
yading@11:         if (!cdomain || !cpath || !cvalue) {
yading@11:             av_log(s, AV_LOG_WARNING,
yading@11:                    "Invalid cookie found, no value, path or domain specified\n");
yading@11:             goto done_cookie;
yading@11:         }
yading@11: 
yading@11:         // check if the request path matches the cookie path
yading@11:         if (av_strncasecmp(path, cpath, strlen(cpath)))
yading@11:             goto done_cookie;
yading@11: 
yading@11:         // the domain should be at least the size of our cookie domain
yading@11:         domain_offset = strlen(domain) - strlen(cdomain);
yading@11:         if (domain_offset < 0)
yading@11:             goto done_cookie;
yading@11: 
yading@11:         // match the cookie domain
yading@11:         if (av_strcasecmp(&domain[domain_offset], cdomain))
yading@11:             goto done_cookie;
yading@11: 
yading@11:         // cookie parameters match, so copy the value
yading@11:         if (!*cookies) {
yading@11:             if (!(*cookies = av_strdup(cvalue))) {
yading@11:                 ret = AVERROR(ENOMEM);
yading@11:                 goto done_cookie;
yading@11:             }
yading@11:         } else {
yading@11:             char *tmp = *cookies;
yading@11:             size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
yading@11:             if (!(*cookies = av_malloc(str_size))) {
yading@11:                 ret = AVERROR(ENOMEM);
yading@11:                 goto done_cookie;
yading@11:             }
yading@11:             snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
yading@11:             av_free(tmp);
yading@11:         }
yading@11: 
yading@11:         done_cookie:
yading@11:         av_free(cdomain);
yading@11:         av_free(cpath);
yading@11:         av_free(cvalue);
yading@11:         if (ret < 0) {
yading@11:             if (*cookies) av_freep(cookies);
yading@11:             av_free(cset_cookies);
yading@11:             return ret;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     av_free(cset_cookies);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static inline int has_header(const char *str, const char *header)
yading@11: {
yading@11:     /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
yading@11:     if (!str)
yading@11:         return 0;
yading@11:     return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
yading@11: }
yading@11: 
yading@11: static int http_read_header(URLContext *h, int *new_location)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     char line[MAX_URL_SIZE];
yading@11:     int err = 0;
yading@11: 
yading@11:     s->chunksize = -1;
yading@11: 
yading@11:     for (;;) {
yading@11:         if ((err = http_get_line(s, line, sizeof(line))) < 0)
yading@11:             return err;
yading@11: 
yading@11:         av_dlog(NULL, "header='%s'\n", line);
yading@11: 
yading@11:         err = process_line(h, line, s->line_count, new_location);
yading@11:         if (err < 0)
yading@11:             return err;
yading@11:         if (err == 0)
yading@11:             break;
yading@11:         s->line_count++;
yading@11:     }
yading@11: 
yading@11:     return err;
yading@11: }
yading@11: 
yading@11: static int http_connect(URLContext *h, const char *path, const char *local_path,
yading@11:                         const char *hoststr, const char *auth,
yading@11:                         const char *proxyauth, int *new_location)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     int post, err;
yading@11:     char headers[4096] = "";
yading@11:     char *authstr = NULL, *proxyauthstr = NULL;
yading@11:     int64_t off = s->off;
yading@11:     int len = 0;
yading@11:     const char *method;
yading@11: 
yading@11: 
yading@11:     /* send http header */
yading@11:     post = h->flags & AVIO_FLAG_WRITE;
yading@11: 
yading@11:     if (s->post_data) {
yading@11:         /* force POST method and disable chunked encoding when
yading@11:          * custom HTTP post data is set */
yading@11:         post = 1;
yading@11:         s->chunked_post = 0;
yading@11:     }
yading@11: 
yading@11:     method = post ? "POST" : "GET";
yading@11:     authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
yading@11:                                            method);
yading@11:     proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
yading@11:                                                 local_path, method);
yading@11: 
yading@11:     /* set default headers if needed */
yading@11:     if (!has_header(s->headers, "\r\nUser-Agent: "))
yading@11:         len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                            "User-Agent: %s\r\n", s->user_agent);
yading@11:     if (!has_header(s->headers, "\r\nAccept: "))
yading@11:         len += av_strlcpy(headers + len, "Accept: */*\r\n",
yading@11:                           sizeof(headers) - len);
yading@11:     // Note: we send this on purpose even when s->off is 0 when we're probing,
yading@11:     // since it allows us to detect more reliably if a (non-conforming)
yading@11:     // server supports seeking by analysing the reply headers.
yading@11:     if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->seekable == -1))
yading@11:         len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                            "Range: bytes=%"PRId64"-\r\n", s->off);
yading@11: 
yading@11:     if (!has_header(s->headers, "\r\nConnection: ")) {
yading@11:         if (s->multiple_requests) {
yading@11:             len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
yading@11:                               sizeof(headers) - len);
yading@11:         } else {
yading@11:             len += av_strlcpy(headers + len, "Connection: close\r\n",
yading@11:                               sizeof(headers) - len);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (!has_header(s->headers, "\r\nHost: "))
yading@11:         len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                            "Host: %s\r\n", hoststr);
yading@11:     if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
yading@11:         len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                            "Content-Length: %d\r\n", s->post_datalen);
yading@11:     if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
yading@11:         len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                            "Content-Type: %s\r\n", s->content_type);
yading@11:     if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
yading@11:         char *cookies = NULL;
yading@11:         if (!get_cookies(s, &cookies, path, hoststr)) {
yading@11:             len += av_strlcatf(headers + len, sizeof(headers) - len,
yading@11:                                "Cookie: %s\r\n", cookies);
yading@11:             av_free(cookies);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     /* now add in custom headers */
yading@11:     if (s->headers)
yading@11:         av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
yading@11: 
yading@11:     snprintf(s->buffer, sizeof(s->buffer),
yading@11:              "%s %s HTTP/1.1\r\n"
yading@11:              "%s"
yading@11:              "%s"
yading@11:              "%s"
yading@11:              "%s%s"
yading@11:              "\r\n",
yading@11:              method,
yading@11:              path,
yading@11:              post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
yading@11:              headers,
yading@11:              authstr ? authstr : "",
yading@11:              proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
yading@11: 
yading@11:     av_freep(&authstr);
yading@11:     av_freep(&proxyauthstr);
yading@11:     if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
yading@11:         return err;
yading@11: 
yading@11:     if (s->post_data)
yading@11:         if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
yading@11:             return err;
yading@11: 
yading@11:     /* init input buffer */
yading@11:     s->buf_ptr = s->buffer;
yading@11:     s->buf_end = s->buffer;
yading@11:     s->line_count = 0;
yading@11:     s->off = 0;
yading@11:     s->filesize = -1;
yading@11:     s->willclose = 0;
yading@11:     s->end_chunked_post = 0;
yading@11:     s->end_header = 0;
yading@11:     if (post && !s->post_data) {
yading@11:         /* Pretend that it did work. We didn't read any header yet, since
yading@11:          * we've still to send the POST data, but the code calling this
yading@11:          * function will check http_code after we return. */
yading@11:         s->http_code = 200;
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     /* wait for header */
yading@11:     err = http_read_header(h, new_location);
yading@11:     if (err < 0)
yading@11:         return err;
yading@11: 
yading@11:     return (off == s->off) ? 0 : -1;
yading@11: }
yading@11: 
yading@11: 
yading@11: static int http_buf_read(URLContext *h, uint8_t *buf, int size)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     int len;
yading@11:     /* read bytes from input buffer first */
yading@11:     len = s->buf_end - s->buf_ptr;
yading@11:     if (len > 0) {
yading@11:         if (len > size)
yading@11:             len = size;
yading@11:         memcpy(buf, s->buf_ptr, len);
yading@11:         s->buf_ptr += len;
yading@11:     } else {
yading@11:         if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
yading@11:             return AVERROR_EOF;
yading@11:         len = ffurl_read(s->hd, buf, size);
yading@11:     }
yading@11:     if (len > 0) {
yading@11:         s->off += len;
yading@11:         if (s->chunksize > 0)
yading@11:             s->chunksize -= len;
yading@11:     }
yading@11:     return len;
yading@11: }
yading@11: 
yading@11: static int http_read(URLContext *h, uint8_t *buf, int size)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     int err, new_location;
yading@11: 
yading@11:     if (!s->hd)
yading@11:         return AVERROR_EOF;
yading@11: 
yading@11:     if (s->end_chunked_post && !s->end_header) {
yading@11:         err = http_read_header(h, &new_location);
yading@11:         if (err < 0)
yading@11:             return err;
yading@11:     }
yading@11: 
yading@11:     if (s->chunksize >= 0) {
yading@11:         if (!s->chunksize) {
yading@11:             char line[32];
yading@11: 
yading@11:             for(;;) {
yading@11:                 do {
yading@11:                     if ((err = http_get_line(s, line, sizeof(line))) < 0)
yading@11:                         return err;
yading@11:                 } while (!*line);    /* skip CR LF from last chunk */
yading@11: 
yading@11:                 s->chunksize = strtoll(line, NULL, 16);
yading@11: 
yading@11:                 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
yading@11: 
yading@11:                 if (!s->chunksize)
yading@11:                     return 0;
yading@11:                 break;
yading@11:             }
yading@11:         }
yading@11:         size = FFMIN(size, s->chunksize);
yading@11:     }
yading@11:     return http_buf_read(h, buf, size);
yading@11: }
yading@11: 
yading@11: /* used only when posting data */
yading@11: static int http_write(URLContext *h, const uint8_t *buf, int size)
yading@11: {
yading@11:     char temp[11] = "";  /* 32-bit hex + CRLF + nul */
yading@11:     int ret;
yading@11:     char crlf[] = "\r\n";
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     if (!s->chunked_post) {
yading@11:         /* non-chunked data is sent without any special encoding */
yading@11:         return ffurl_write(s->hd, buf, size);
yading@11:     }
yading@11: 
yading@11:     /* silently ignore zero-size data since chunk encoding that would
yading@11:      * signal EOF */
yading@11:     if (size > 0) {
yading@11:         /* upload data using chunked encoding */
yading@11:         snprintf(temp, sizeof(temp), "%x\r\n", size);
yading@11: 
yading@11:         if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
yading@11:             (ret = ffurl_write(s->hd, buf, size)) < 0 ||
yading@11:             (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
yading@11:             return ret;
yading@11:     }
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: static int http_shutdown(URLContext *h, int flags)
yading@11: {
yading@11:     int ret = 0;
yading@11:     char footer[] = "0\r\n\r\n";
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     /* signal end of chunked encoding if used */
yading@11:     if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
yading@11:         ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
yading@11:         ret = ret > 0 ? 0 : ret;
yading@11:         s->end_chunked_post = 1;
yading@11:     }
yading@11: 
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int http_close(URLContext *h)
yading@11: {
yading@11:     int ret = 0;
yading@11:     HTTPContext *s = h->priv_data;
yading@11: 
yading@11:     if (!s->end_chunked_post) {
yading@11:         /* Close the write direction by sending the end of chunked encoding. */
yading@11:         ret = http_shutdown(h, h->flags);
yading@11:     }
yading@11: 
yading@11:     if (s->hd)
yading@11:         ffurl_closep(&s->hd);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int64_t http_seek(URLContext *h, int64_t off, int whence)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     URLContext *old_hd = s->hd;
yading@11:     int64_t old_off = s->off;
yading@11:     uint8_t old_buf[BUFFER_SIZE];
yading@11:     int old_buf_size;
yading@11: 
yading@11:     if (whence == AVSEEK_SIZE)
yading@11:         return s->filesize;
yading@11:     else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
yading@11:         return -1;
yading@11: 
yading@11:     /* we save the old context in case the seek fails */
yading@11:     old_buf_size = s->buf_end - s->buf_ptr;
yading@11:     memcpy(old_buf, s->buf_ptr, old_buf_size);
yading@11:     s->hd = NULL;
yading@11:     if (whence == SEEK_CUR)
yading@11:         off += s->off;
yading@11:     else if (whence == SEEK_END)
yading@11:         off += s->filesize;
yading@11:     s->off = off;
yading@11: 
yading@11:     /* if it fails, continue on old connection */
yading@11:     if (http_open_cnx(h) < 0) {
yading@11:         memcpy(s->buffer, old_buf, old_buf_size);
yading@11:         s->buf_ptr = s->buffer;
yading@11:         s->buf_end = s->buffer + old_buf_size;
yading@11:         s->hd = old_hd;
yading@11:         s->off = old_off;
yading@11:         return -1;
yading@11:     }
yading@11:     ffurl_close(old_hd);
yading@11:     return off;
yading@11: }
yading@11: 
yading@11: static int
yading@11: http_get_file_handle(URLContext *h)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     return ffurl_get_file_handle(s->hd);
yading@11: }
yading@11: 
yading@11: #if CONFIG_HTTP_PROTOCOL
yading@11: URLProtocol ff_http_protocol = {
yading@11:     .name                = "http",
yading@11:     .url_open            = http_open,
yading@11:     .url_read            = http_read,
yading@11:     .url_write           = http_write,
yading@11:     .url_seek            = http_seek,
yading@11:     .url_close           = http_close,
yading@11:     .url_get_file_handle = http_get_file_handle,
yading@11:     .url_shutdown        = http_shutdown,
yading@11:     .priv_data_size      = sizeof(HTTPContext),
yading@11:     .priv_data_class     = &http_context_class,
yading@11:     .flags               = URL_PROTOCOL_FLAG_NETWORK,
yading@11: };
yading@11: #endif
yading@11: #if CONFIG_HTTPS_PROTOCOL
yading@11: URLProtocol ff_https_protocol = {
yading@11:     .name                = "https",
yading@11:     .url_open            = http_open,
yading@11:     .url_read            = http_read,
yading@11:     .url_write           = http_write,
yading@11:     .url_seek            = http_seek,
yading@11:     .url_close           = http_close,
yading@11:     .url_get_file_handle = http_get_file_handle,
yading@11:     .url_shutdown        = http_shutdown,
yading@11:     .priv_data_size      = sizeof(HTTPContext),
yading@11:     .priv_data_class     = &https_context_class,
yading@11:     .flags               = URL_PROTOCOL_FLAG_NETWORK,
yading@11: };
yading@11: #endif
yading@11: 
yading@11: #if CONFIG_HTTPPROXY_PROTOCOL
yading@11: static int http_proxy_close(URLContext *h)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     if (s->hd)
yading@11:         ffurl_closep(&s->hd);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int http_proxy_open(URLContext *h, const char *uri, int flags)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     char hostname[1024], hoststr[1024];
yading@11:     char auth[1024], pathbuf[1024], *path;
yading@11:     char lower_url[100];
yading@11:     int port, ret = 0, attempts = 0;
yading@11:     HTTPAuthType cur_auth_type;
yading@11:     char *authstr;
yading@11:     int new_loc;
yading@11:     AVDictionary *opts = NULL;
yading@11:     char opts_format[20];
yading@11: 
yading@11:     if( s->seekable == 1 )
yading@11:         h->is_streamed = 0;
yading@11:     else
yading@11:         h->is_streamed = 1;
yading@11: 
yading@11:     av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
yading@11:                  pathbuf, sizeof(pathbuf), uri);
yading@11:     ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
yading@11:     path = pathbuf;
yading@11:     if (*path == '/')
yading@11:         path++;
yading@11: 
yading@11:     ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
yading@11:                 NULL);
yading@11: redo:
yading@11:     if (s->rw_timeout != -1) {
yading@11:         snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
yading@11:         av_dict_set(&opts, "timeout", opts_format, 0);
yading@11:     } /* if option is not given, don't pass it and let tcp use its own default */
yading@11:     ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
yading@11:                      &h->interrupt_callback, &opts);
yading@11:     av_dict_free(&opts);
yading@11:     if (ret < 0)
yading@11:         return ret;
yading@11: 
yading@11:     authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
yading@11:                                            path, "CONNECT");
yading@11:     snprintf(s->buffer, sizeof(s->buffer),
yading@11:              "CONNECT %s HTTP/1.1\r\n"
yading@11:              "Host: %s\r\n"
yading@11:              "Connection: close\r\n"
yading@11:              "%s%s"
yading@11:              "\r\n",
yading@11:              path,
yading@11:              hoststr,
yading@11:              authstr ? "Proxy-" : "", authstr ? authstr : "");
yading@11:     av_freep(&authstr);
yading@11: 
yading@11:     if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
yading@11:         goto fail;
yading@11: 
yading@11:     s->buf_ptr = s->buffer;
yading@11:     s->buf_end = s->buffer;
yading@11:     s->line_count = 0;
yading@11:     s->filesize = -1;
yading@11:     cur_auth_type = s->proxy_auth_state.auth_type;
yading@11: 
yading@11:     /* Note: This uses buffering, potentially reading more than the
yading@11:      * HTTP header. If tunneling a protocol where the server starts
yading@11:      * the conversation, we might buffer part of that here, too.
yading@11:      * Reading that requires using the proper ffurl_read() function
yading@11:      * on this URLContext, not using the fd directly (as the tls
yading@11:      * protocol does). This shouldn't be an issue for tls though,
yading@11:      * since the client starts the conversation there, so there
yading@11:      * is no extra data that we might buffer up here.
yading@11:      */
yading@11:     ret = http_read_header(h, &new_loc);
yading@11:     if (ret < 0)
yading@11:         goto fail;
yading@11: 
yading@11:     attempts++;
yading@11:     if (s->http_code == 407 &&
yading@11:         (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
yading@11:         s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
yading@11:         ffurl_closep(&s->hd);
yading@11:         goto redo;
yading@11:     }
yading@11: 
yading@11:     if (s->http_code < 400)
yading@11:         return 0;
yading@11:     ret = AVERROR(EIO);
yading@11: 
yading@11: fail:
yading@11:     http_proxy_close(h);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
yading@11: {
yading@11:     HTTPContext *s = h->priv_data;
yading@11:     return ffurl_write(s->hd, buf, size);
yading@11: }
yading@11: 
yading@11: URLProtocol ff_httpproxy_protocol = {
yading@11:     .name                = "httpproxy",
yading@11:     .url_open            = http_proxy_open,
yading@11:     .url_read            = http_buf_read,
yading@11:     .url_write           = http_proxy_write,
yading@11:     .url_close           = http_proxy_close,
yading@11:     .url_get_file_handle = http_get_file_handle,
yading@11:     .priv_data_size      = sizeof(HTTPContext),
yading@11:     .flags               = URL_PROTOCOL_FLAG_NETWORK,
yading@11: };
yading@11: #endif