diff options
Diffstat (limited to 'ffmpeg1/libavformat/http.c')
| -rw-r--r-- | ffmpeg1/libavformat/http.c | 945 |
1 files changed, 945 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/http.c b/ffmpeg1/libavformat/http.c new file mode 100644 index 0000000..1e3cff7 --- /dev/null +++ b/ffmpeg1/libavformat/http.c @@ -0,0 +1,945 @@ +/* + * HTTP protocol for ffmpeg client + * Copyright (c) 2000, 2001 Fabrice Bellard + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/avstring.h" +#include "avformat.h" +#include "internal.h" +#include "network.h" +#include "http.h" +#include "os_support.h" +#include "httpauth.h" +#include "url.h" +#include "libavutil/opt.h" + +/* XXX: POST protocol is not completely implemented because ffmpeg uses + only a subset of it. */ + +/* The IO buffer size is unrelated to the max URL size in itself, but needs + * to be large enough to fit the full request headers (including long + * path names). + */ +#define BUFFER_SIZE MAX_URL_SIZE +#define MAX_REDIRECTS 8 + +typedef struct { + const AVClass *class; + URLContext *hd; + unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end; + int line_count; + int http_code; + int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */ + char *content_type; + char *user_agent; + int64_t off, filesize; + char location[MAX_URL_SIZE]; + HTTPAuthState auth_state; + HTTPAuthState proxy_auth_state; + char *headers; + int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */ + int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */ + int chunked_post; + int end_chunked_post; /**< A flag which indicates if the end of chunked encoding has been sent. */ + int end_header; /**< A flag which indicates we have finished to read POST reply. */ + int multiple_requests; /**< A flag which indicates if we use persistent connections. */ + uint8_t *post_data; + int post_datalen; + int is_akamai; + int rw_timeout; + char *mime_type; + char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) +} HTTPContext; + +#define OFFSET(x) offsetof(HTTPContext, x) +#define D AV_OPT_FLAG_DECODING_PARAM +#define E AV_OPT_FLAG_ENCODING_PARAM +#define DEC AV_OPT_FLAG_DECODING_PARAM +static const AVOption options[] = { +{"seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, D }, +{"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E }, +{"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, +{"content_type", "force a content type", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, +{"user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC}, +{"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, +{"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E }, +{"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E }, +{"mime_type", "set MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 }, +{"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 }, +{NULL} +}; +#define HTTP_CLASS(flavor)\ +static const AVClass flavor ## _context_class = {\ + .class_name = #flavor,\ + .item_name = av_default_item_name,\ + .option = options,\ + .version = LIBAVUTIL_VERSION_INT,\ +} + +HTTP_CLASS(http); +HTTP_CLASS(https); + +static int http_connect(URLContext *h, const char *path, const char *local_path, + const char *hoststr, const char *auth, + const char *proxyauth, int *new_location); + +void ff_http_init_auth_state(URLContext *dest, const URLContext *src) +{ + memcpy(&((HTTPContext*)dest->priv_data)->auth_state, + &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState)); + memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state, + &((HTTPContext*)src->priv_data)->proxy_auth_state, + sizeof(HTTPAuthState)); +} + +/* return non zero if error */ +static int http_open_cnx(URLContext *h) +{ + const char *path, *proxy_path, *lower_proto = "tcp", *local_path; + char hostname[1024], hoststr[1024], proto[10]; + char auth[1024], proxyauth[1024] = ""; + char path1[MAX_URL_SIZE]; + char buf[1024], urlbuf[MAX_URL_SIZE]; + int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0; + HTTPAuthType cur_auth_type, cur_proxy_auth_type; + HTTPContext *s = h->priv_data; + + /* fill the dest addr */ + redo: + /* needed in any case to build the host string */ + av_url_split(proto, sizeof(proto), auth, sizeof(auth), + hostname, sizeof(hostname), &port, + path1, sizeof(path1), s->location); + ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); + + proxy_path = getenv("http_proxy"); + use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) && + proxy_path != NULL && av_strstart(proxy_path, "http://", NULL); + + if (!strcmp(proto, "https")) { + lower_proto = "tls"; + use_proxy = 0; + if (port < 0) + port = 443; + } + if (port < 0) + port = 80; + + if (path1[0] == '\0') + path = "/"; + else + path = path1; + local_path = path; + if (use_proxy) { + /* Reassemble the request URL without auth string - we don't + * want to leak the auth to the proxy. */ + ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s", + path1); + path = urlbuf; + av_url_split(NULL, 0, proxyauth, sizeof(proxyauth), + hostname, sizeof(hostname), &port, NULL, 0, proxy_path); + } + + ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL); + + if (!s->hd) { + AVDictionary *opts = NULL; + char opts_format[20]; + if (s->rw_timeout != -1) { + snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout); + av_dict_set(&opts, "timeout", opts_format, 0); + } /* if option is not given, don't pass it and let tcp use its own default */ + err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE, + &h->interrupt_callback, &opts); + av_dict_free(&opts); + if (err < 0) + goto fail; + } + + cur_auth_type = s->auth_state.auth_type; + cur_proxy_auth_type = s->auth_state.auth_type; + if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0) + goto fail; + attempts++; + if (s->http_code == 401) { + if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) && + s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { + ffurl_closep(&s->hd); + goto redo; + } else + goto fail; + } + if (s->http_code == 407) { + if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && + s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { + ffurl_closep(&s->hd); + goto redo; + } else + goto fail; + } + if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307) + && location_changed == 1) { + /* url moved, get next */ + ffurl_closep(&s->hd); + if (redirects++ >= MAX_REDIRECTS) + return AVERROR(EIO); + /* Restart the authentication process with the new target, which + * might use a different auth mechanism. */ + memset(&s->auth_state, 0, sizeof(s->auth_state)); + attempts = 0; + location_changed = 0; + goto redo; + } + return 0; + fail: + if (s->hd) + ffurl_closep(&s->hd); + return AVERROR(EIO); +} + +int ff_http_do_new_request(URLContext *h, const char *uri) +{ + HTTPContext *s = h->priv_data; + + s->off = 0; + av_strlcpy(s->location, uri, sizeof(s->location)); + + return http_open_cnx(h); +} + +static int http_open(URLContext *h, const char *uri, int flags) +{ + HTTPContext *s = h->priv_data; + + if( s->seekable == 1 ) + h->is_streamed = 0; + else + h->is_streamed = 1; + + s->filesize = -1; + av_strlcpy(s->location, uri, sizeof(s->location)); + + if (s->headers) { + int len = strlen(s->headers); + if (len < 2 || strcmp("\r\n", s->headers + len - 2)) + av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n"); + } + + return http_open_cnx(h); +} +static int http_getc(HTTPContext *s) +{ + int len; + if (s->buf_ptr >= s->buf_end) { + len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); + if (len < 0) { + return len; + } else if (len == 0) { + return -1; + } else { + s->buf_ptr = s->buffer; + s->buf_end = s->buffer + len; + } + } + return *s->buf_ptr++; +} + +static int http_get_line(HTTPContext *s, char *line, int line_size) +{ + int ch; + char *q; + + q = line; + for(;;) { + ch = http_getc(s); + if (ch < 0) + return ch; + if (ch == '\n') { + /* process line */ + if (q > line && q[-1] == '\r') + q--; + *q = '\0'; + + return 0; + } else { + if ((q - line) < line_size - 1) + *q++ = ch; + } + } +} + +static int process_line(URLContext *h, char *line, int line_count, + int *new_location) +{ + HTTPContext *s = h->priv_data; + char *tag, *p, *end; + + /* end of header */ + if (line[0] == '\0') { + s->end_header = 1; + return 0; + } + + p = line; + if (line_count == 0) { + while (!av_isspace(*p) && *p != '\0') + p++; + while (av_isspace(*p)) + p++; + s->http_code = strtol(p, &end, 10); + + av_dlog(NULL, "http_code=%d\n", s->http_code); + + /* error codes are 4xx and 5xx, but regard 401 as a success, so we + * don't abort until all headers have been parsed. */ + if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401 + || s->auth_state.auth_type != HTTP_AUTH_NONE) && + (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) { + end += strspn(end, SPACE_CHARS); + av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", + s->http_code, end); + return -1; + } + } else { + while (*p != '\0' && *p != ':') + p++; + if (*p != ':') + return 1; + + *p = '\0'; + tag = line; + p++; + while (av_isspace(*p)) + p++; + if (!av_strcasecmp(tag, "Location")) { + av_strlcpy(s->location, p, sizeof(s->location)); + *new_location = 1; + } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) { + s->filesize = strtoll(p, NULL, 10); + } else if (!av_strcasecmp (tag, "Content-Range")) { + /* "bytes $from-$to/$document_size" */ + const char *slash; + if (!strncmp (p, "bytes ", 6)) { + p += 6; + s->off = strtoll(p, NULL, 10); + if ((slash = strchr(p, '/')) && strlen(slash) > 0) + s->filesize = strtoll(slash+1, NULL, 10); + } + if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647)) + h->is_streamed = 0; /* we _can_ in fact seek */ + } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5) && s->seekable == -1) { + h->is_streamed = 0; + } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) { + s->filesize = -1; + s->chunksize = 0; + } else if (!av_strcasecmp (tag, "WWW-Authenticate")) { + ff_http_auth_handle_header(&s->auth_state, tag, p); + } else if (!av_strcasecmp (tag, "Authentication-Info")) { + ff_http_auth_handle_header(&s->auth_state, tag, p); + } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) { + ff_http_auth_handle_header(&s->proxy_auth_state, tag, p); + } else if (!av_strcasecmp (tag, "Connection")) { + if (!strcmp(p, "close")) + s->willclose = 1; + } else if (!av_strcasecmp (tag, "Server") && !av_strcasecmp (p, "AkamaiGHost")) { + s->is_akamai = 1; + } else if (!av_strcasecmp (tag, "Content-Type")) { + av_free(s->mime_type); s->mime_type = av_strdup(p); + } else if (!av_strcasecmp (tag, "Set-Cookie")) { + if (!s->cookies) { + if (!(s->cookies = av_strdup(p))) + return AVERROR(ENOMEM); + } else { + char *tmp = s->cookies; + size_t str_size = strlen(tmp) + strlen(p) + 2; + if (!(s->cookies = av_malloc(str_size))) { + s->cookies = tmp; + return AVERROR(ENOMEM); + } + snprintf(s->cookies, str_size, "%s\n%s", tmp, p); + av_free(tmp); + } + } + } + return 1; +} + +/** + * Create a string containing cookie values for use as a HTTP cookie header + * field value for a particular path and domain from the cookie values stored in + * the HTTP protocol context. The cookie string is stored in *cookies. + * + * @return a negative value if an error condition occurred, 0 otherwise + */ +static int get_cookies(HTTPContext *s, char **cookies, const char *path, + const char *domain) +{ + // cookie strings will look like Set-Cookie header field values. Multiple + // Set-Cookie fields will result in multiple values delimited by a newline + int ret = 0; + char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies; + + if (!set_cookies) return AVERROR(EINVAL); + + *cookies = NULL; + while ((cookie = av_strtok(set_cookies, "\n", &next))) { + int domain_offset = 0; + char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL; + set_cookies = NULL; + + while ((param = av_strtok(cookie, "; ", &next_param))) { + cookie = NULL; + if (!av_strncasecmp("path=", param, 5)) { + av_free(cpath); + cpath = av_strdup(¶m[5]); + } else if (!av_strncasecmp("domain=", param, 7)) { + av_free(cdomain); + cdomain = av_strdup(¶m[7]); + } else if (!av_strncasecmp("secure", param, 6) || + !av_strncasecmp("comment", param, 7) || + !av_strncasecmp("max-age", param, 7) || + !av_strncasecmp("version", param, 7)) { + // ignore Comment, Max-Age, Secure and Version + } else { + av_free(cvalue); + cvalue = av_strdup(param); + } + } + + // ensure all of the necessary values are valid + if (!cdomain || !cpath || !cvalue) { + av_log(s, AV_LOG_WARNING, + "Invalid cookie found, no value, path or domain specified\n"); + goto done_cookie; + } + + // check if the request path matches the cookie path + if (av_strncasecmp(path, cpath, strlen(cpath))) + goto done_cookie; + + // the domain should be at least the size of our cookie domain + domain_offset = strlen(domain) - strlen(cdomain); + if (domain_offset < 0) + goto done_cookie; + + // match the cookie domain + if (av_strcasecmp(&domain[domain_offset], cdomain)) + goto done_cookie; + + // cookie parameters match, so copy the value + if (!*cookies) { + if (!(*cookies = av_strdup(cvalue))) { + ret = AVERROR(ENOMEM); + goto done_cookie; + } + } else { + char *tmp = *cookies; + size_t str_size = strlen(cvalue) + strlen(*cookies) + 3; + if (!(*cookies = av_malloc(str_size))) { + ret = AVERROR(ENOMEM); + goto done_cookie; + } + snprintf(*cookies, str_size, "%s; %s", tmp, cvalue); + av_free(tmp); + } + + done_cookie: + av_free(cdomain); + av_free(cpath); + av_free(cvalue); + if (ret < 0) { + if (*cookies) av_freep(cookies); + av_free(cset_cookies); + return ret; + } + } + + av_free(cset_cookies); + + return 0; +} + +static inline int has_header(const char *str, const char *header) +{ + /* header + 2 to skip over CRLF prefix. (make sure you have one!) */ + if (!str) + return 0; + return av_stristart(str, header + 2, NULL) || av_stristr(str, header); +} + +static int http_read_header(URLContext *h, int *new_location) +{ + HTTPContext *s = h->priv_data; + char line[MAX_URL_SIZE]; + int err = 0; + + s->chunksize = -1; + + for (;;) { + if ((err = http_get_line(s, line, sizeof(line))) < 0) + return err; + + av_dlog(NULL, "header='%s'\n", line); + + err = process_line(h, line, s->line_count, new_location); + if (err < 0) + return err; + if (err == 0) + break; + s->line_count++; + } + + return err; +} + +static int http_connect(URLContext *h, const char *path, const char *local_path, + const char *hoststr, const char *auth, + const char *proxyauth, int *new_location) +{ + HTTPContext *s = h->priv_data; + int post, err; + char headers[4096] = ""; + char *authstr = NULL, *proxyauthstr = NULL; + int64_t off = s->off; + int len = 0; + const char *method; + + + /* send http header */ + post = h->flags & AVIO_FLAG_WRITE; + + if (s->post_data) { + /* force POST method and disable chunked encoding when + * custom HTTP post data is set */ + post = 1; + s->chunked_post = 0; + } + + method = post ? "POST" : "GET"; + authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path, + method); + proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth, + local_path, method); + + /* set default headers if needed */ + if (!has_header(s->headers, "\r\nUser-Agent: ")) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "User-Agent: %s\r\n", + s->user_agent ? s->user_agent : LIBAVFORMAT_IDENT); + if (!has_header(s->headers, "\r\nAccept: ")) + len += av_strlcpy(headers + len, "Accept: */*\r\n", + sizeof(headers) - len); + // Note: we send this on purpose even when s->off is 0 when we're probing, + // since it allows us to detect more reliably if a (non-conforming) + // server supports seeking by analysing the reply headers. + if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->seekable == -1)) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Range: bytes=%"PRId64"-\r\n", s->off); + + if (!has_header(s->headers, "\r\nConnection: ")) { + if (s->multiple_requests) { + len += av_strlcpy(headers + len, "Connection: keep-alive\r\n", + sizeof(headers) - len); + } else { + len += av_strlcpy(headers + len, "Connection: close\r\n", + sizeof(headers) - len); + } + } + + if (!has_header(s->headers, "\r\nHost: ")) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Host: %s\r\n", hoststr); + if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Content-Length: %d\r\n", s->post_datalen); + if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Content-Type: %s\r\n", s->content_type); + if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) { + char *cookies = NULL; + if (!get_cookies(s, &cookies, path, hoststr)) { + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Cookie: %s\r\n", cookies); + av_free(cookies); + } + } + + /* now add in custom headers */ + if (s->headers) + av_strlcpy(headers + len, s->headers, sizeof(headers) - len); + + snprintf(s->buffer, sizeof(s->buffer), + "%s %s HTTP/1.1\r\n" + "%s" + "%s" + "%s" + "%s%s" + "\r\n", + method, + path, + post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "", + headers, + authstr ? authstr : "", + proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : ""); + + av_freep(&authstr); + av_freep(&proxyauthstr); + if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) + return err; + + if (s->post_data) + if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0) + return err; + + /* init input buffer */ + s->buf_ptr = s->buffer; + s->buf_end = s->buffer; + s->line_count = 0; + s->off = 0; + s->filesize = -1; + s->willclose = 0; + s->end_chunked_post = 0; + s->end_header = 0; + if (post && !s->post_data) { + /* Pretend that it did work. We didn't read any header yet, since + * we've still to send the POST data, but the code calling this + * function will check http_code after we return. */ + s->http_code = 200; + return 0; + } + + /* wait for header */ + err = http_read_header(h, new_location); + if (err < 0) + return err; + + return (off == s->off) ? 0 : -1; +} + + +static int http_buf_read(URLContext *h, uint8_t *buf, int size) +{ + HTTPContext *s = h->priv_data; + int len; + /* read bytes from input buffer first */ + len = s->buf_end - s->buf_ptr; + if (len > 0) { + if (len > size) + len = size; + memcpy(buf, s->buf_ptr, len); + s->buf_ptr += len; + } else { + if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize) + return AVERROR_EOF; + len = ffurl_read(s->hd, buf, size); + } + if (len > 0) { + s->off += len; + if (s->chunksize > 0) + s->chunksize -= len; + } + return len; +} + +static int http_read(URLContext *h, uint8_t *buf, int size) +{ + HTTPContext *s = h->priv_data; + int err, new_location; + + if (!s->hd) + return AVERROR_EOF; + + if (s->end_chunked_post && !s->end_header) { + err = http_read_header(h, &new_location); + if (err < 0) + return err; + } + + if (s->chunksize >= 0) { + if (!s->chunksize) { + char line[32]; + + for(;;) { + do { + if ((err = http_get_line(s, line, sizeof(line))) < 0) + return err; + } while (!*line); /* skip CR LF from last chunk */ + + s->chunksize = strtoll(line, NULL, 16); + + av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize); + + if (!s->chunksize) + return 0; + break; + } + } + size = FFMIN(size, s->chunksize); + } + return http_buf_read(h, buf, size); +} + +/* used only when posting data */ +static int http_write(URLContext *h, const uint8_t *buf, int size) +{ + char temp[11] = ""; /* 32-bit hex + CRLF + nul */ + int ret; + char crlf[] = "\r\n"; + HTTPContext *s = h->priv_data; + + if (!s->chunked_post) { + /* non-chunked data is sent without any special encoding */ + return ffurl_write(s->hd, buf, size); + } + + /* silently ignore zero-size data since chunk encoding that would + * signal EOF */ + if (size > 0) { + /* upload data using chunked encoding */ + snprintf(temp, sizeof(temp), "%x\r\n", size); + + if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 || + (ret = ffurl_write(s->hd, buf, size)) < 0 || + (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0) + return ret; + } + return size; +} + +static int http_shutdown(URLContext *h, int flags) +{ + int ret = 0; + char footer[] = "0\r\n\r\n"; + HTTPContext *s = h->priv_data; + + /* signal end of chunked encoding if used */ + if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) { + ret = ffurl_write(s->hd, footer, sizeof(footer) - 1); + ret = ret > 0 ? 0 : ret; + s->end_chunked_post = 1; + } + + return ret; +} + +static int http_close(URLContext *h) +{ + int ret = 0; + HTTPContext *s = h->priv_data; + + if (!s->end_chunked_post) { + /* Close the write direction by sending the end of chunked encoding. */ + ret = http_shutdown(h, h->flags); + } + + if (s->hd) + ffurl_closep(&s->hd); + return ret; +} + +static int64_t http_seek(URLContext *h, int64_t off, int whence) +{ + HTTPContext *s = h->priv_data; + URLContext *old_hd = s->hd; + int64_t old_off = s->off; + uint8_t old_buf[BUFFER_SIZE]; + int old_buf_size; + + if (whence == AVSEEK_SIZE) + return s->filesize; + else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed) + return -1; + + /* we save the old context in case the seek fails */ + old_buf_size = s->buf_end - s->buf_ptr; + memcpy(old_buf, s->buf_ptr, old_buf_size); + s->hd = NULL; + if (whence == SEEK_CUR) + off += s->off; + else if (whence == SEEK_END) + off += s->filesize; + s->off = off; + + /* if it fails, continue on old connection */ + if (http_open_cnx(h) < 0) { + memcpy(s->buffer, old_buf, old_buf_size); + s->buf_ptr = s->buffer; + s->buf_end = s->buffer + old_buf_size; + s->hd = old_hd; + s->off = old_off; + return -1; + } + ffurl_close(old_hd); + return off; +} + +static int +http_get_file_handle(URLContext *h) +{ + HTTPContext *s = h->priv_data; + return ffurl_get_file_handle(s->hd); +} + +#if CONFIG_HTTP_PROTOCOL +URLProtocol ff_http_protocol = { + .name = "http", + .url_open = http_open, + .url_read = http_read, + .url_write = http_write, + .url_seek = http_seek, + .url_close = http_close, + .url_get_file_handle = http_get_file_handle, + .url_shutdown = http_shutdown, + .priv_data_size = sizeof(HTTPContext), + .priv_data_class = &http_context_class, + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; +#endif +#if CONFIG_HTTPS_PROTOCOL +URLProtocol ff_https_protocol = { + .name = "https", + .url_open = http_open, + .url_read = http_read, + .url_write = http_write, + .url_seek = http_seek, + .url_close = http_close, + .url_get_file_handle = http_get_file_handle, + .url_shutdown = http_shutdown, + .priv_data_size = sizeof(HTTPContext), + .priv_data_class = &https_context_class, + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; +#endif + +#if CONFIG_HTTPPROXY_PROTOCOL +static int http_proxy_close(URLContext *h) +{ + HTTPContext *s = h->priv_data; + if (s->hd) + ffurl_closep(&s->hd); + return 0; +} + +static int http_proxy_open(URLContext *h, const char *uri, int flags) +{ + HTTPContext *s = h->priv_data; + char hostname[1024], hoststr[1024]; + char auth[1024], pathbuf[1024], *path; + char lower_url[100]; + int port, ret = 0, attempts = 0; + HTTPAuthType cur_auth_type; + char *authstr; + int new_loc; + AVDictionary *opts = NULL; + char opts_format[20]; + + if( s->seekable == 1 ) + h->is_streamed = 0; + else + h->is_streamed = 1; + + av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, + pathbuf, sizeof(pathbuf), uri); + ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); + path = pathbuf; + if (*path == '/') + path++; + + ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port, + NULL); +redo: + if (s->rw_timeout != -1) { + snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout); + av_dict_set(&opts, "timeout", opts_format, 0); + } /* if option is not given, don't pass it and let tcp use its own default */ + ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, + &h->interrupt_callback, &opts); + av_dict_free(&opts); + if (ret < 0) + return ret; + + authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth, + path, "CONNECT"); + snprintf(s->buffer, sizeof(s->buffer), + "CONNECT %s HTTP/1.1\r\n" + "Host: %s\r\n" + "Connection: close\r\n" + "%s%s" + "\r\n", + path, + hoststr, + authstr ? "Proxy-" : "", authstr ? authstr : ""); + av_freep(&authstr); + + if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) + goto fail; + + s->buf_ptr = s->buffer; + s->buf_end = s->buffer; + s->line_count = 0; + s->filesize = -1; + cur_auth_type = s->proxy_auth_state.auth_type; + + /* Note: This uses buffering, potentially reading more than the + * HTTP header. If tunneling a protocol where the server starts + * the conversation, we might buffer part of that here, too. + * Reading that requires using the proper ffurl_read() function + * on this URLContext, not using the fd directly (as the tls + * protocol does). This shouldn't be an issue for tls though, + * since the client starts the conversation there, so there + * is no extra data that we might buffer up here. + */ + ret = http_read_header(h, &new_loc); + if (ret < 0) + goto fail; + + attempts++; + if (s->http_code == 407 && + (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && + s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) { + ffurl_closep(&s->hd); + goto redo; + } + + if (s->http_code < 400) + return 0; + ret = AVERROR(EIO); + +fail: + http_proxy_close(h); + return ret; +} + +static int http_proxy_write(URLContext *h, const uint8_t *buf, int size) +{ + HTTPContext *s = h->priv_data; + return ffurl_write(s->hd, buf, size); +} + +URLProtocol ff_httpproxy_protocol = { + .name = "httpproxy", + .url_open = http_proxy_open, + .url_read = http_buf_read, + .url_write = http_proxy_write, + .url_close = http_proxy_close, + .url_get_file_handle = http_get_file_handle, + .priv_data_size = sizeof(HTTPContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; +#endif |