X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fhttp.c;h=aa8c6657dbbf1b126f7e6881a61d2d35d3235ee9;hb=4904995652dbbfc7cb37fef9656b9b86f53449f7;hp=f81ce1654b427a6d05da914885f8da60f4637b6e;hpb=ce2749d2c462fe90f18f3817af65d81a08e4d0dd;p=ffmpeg diff --git a/libavformat/http.c b/libavformat/http.c index f81ce1654b4..aa8c6657dbb 100644 --- a/libavformat/http.c +++ b/libavformat/http.c @@ -1,94 +1,122 @@ /* * HTTP protocol for ffmpeg client - * Copyright (c) 2000, 2001 Fabrice Bellard. + * Copyright (c) 2000, 2001 Fabrice Bellard * - * This library is free software; you can redistribute it and/or + * This file is part of Libav. + * + * Libav 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * Libav 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * License along with Libav; 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 -#include -#include -#include -#include -#ifndef __BEOS__ -# include -#else -# include "barpainet.h" -#endif -#include - - -/* XXX: POST protocol is not completly implemented because ffmpeg use - only a subset of it */ +#include +#include "internal.h" +#include "network.h" +#include "http.h" +#include "os_support.h" +#include "httpauth.h" +#include "url.h" +#include "libavutil/opt.h" -//#define DEBUG +/* XXX: POST protocol is not completely implemented because ffmpeg uses + only a subset of it. */ /* used for protocol handling */ #define BUFFER_SIZE 1024 -#define URL_SIZE 4096 +#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; - char location[URL_SIZE]; + int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */ + int64_t off, filesize; + char location[MAX_URL_SIZE]; + HTTPAuthState auth_state; + unsigned char headers[BUFFER_SIZE]; + int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */ } HTTPContext; -static int http_connect(URLContext *h, const char *path, const char *hoststr); -static int http_write(URLContext *h, uint8_t *buf, int size); +#define OFFSET(x) offsetof(HTTPContext, x) +static const AVOption options[] = { +{"chunksize", "use chunked transfer-encoding for posts, -1 disables it, 0 enables it", OFFSET(chunksize), FF_OPT_TYPE_INT64, {.dbl = 0}, -1, 0 }, /* Default to 0, for chunked POSTs */ +{NULL} +}; +static const AVClass httpcontext_class = { + .class_name = "HTTP", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; +static int http_connect(URLContext *h, const char *path, const char *hoststr, + const char *auth, int *new_location); + +void ff_http_set_headers(URLContext *h, const char *headers) +{ + HTTPContext *s = h->priv_data; + int len = strlen(headers); + + if (len && strcmp("\r\n", headers + len - 2)) + av_log(h, AV_LOG_ERROR, "No trailing CRLF found in HTTP header.\n"); + + av_strlcpy(s->headers, headers, sizeof(s->headers)); +} + +void ff_http_set_chunked_transfer_encoding(URLContext *h, int is_chunked) +{ + ((HTTPContext*)h->priv_data)->chunksize = is_chunked ? 0 : -1; +} + +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)); +} /* return non zero if error */ -static int http_open(URLContext *h, const char *uri, int flags) +static int http_open_cnx(URLContext *h) { const char *path, *proxy_path; char hostname[1024], hoststr[1024]; + char auth[1024]; char path1[1024]; char buf[1024]; - int port, use_proxy, err; - HTTPContext *s; + int port, use_proxy, err, location_changed = 0, redirects = 0; + HTTPAuthType cur_auth_type; + HTTPContext *s = h->priv_data; URLContext *hd = NULL; - h->is_streamed = 1; - - s = av_malloc(sizeof(HTTPContext)); - if (!s) { - return -ENOMEM; - } - h->priv_data = s; - proxy_path = getenv("http_proxy"); - use_proxy = (proxy_path != NULL) && !getenv("no_proxy") && - strstart(proxy_path, "http://", NULL); + use_proxy = (proxy_path != NULL) && !getenv("no_proxy") && + av_strstart(proxy_path, "http://", NULL); /* fill the dest addr */ redo: /* needed in any case to build the host string */ - url_split(NULL, 0, hostname, sizeof(hostname), &port, - path1, sizeof(path1), uri); - if (port > 0) { - snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port); - } else { - pstrcpy(hoststr, sizeof(hoststr), hostname); - } + av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, + path1, sizeof(path1), s->location); + ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); if (use_proxy) { - url_split(NULL, 0, hostname, sizeof(hostname), &port, - NULL, 0, proxy_path); - path = uri; + av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, + NULL, 0, proxy_path); + path = s->location; } else { if (path1[0] == '\0') path = "/"; @@ -98,35 +126,57 @@ static int http_open(URLContext *h, const char *uri, int flags) if (port < 0) port = 80; - snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port); - err = url_open(&hd, buf, URL_RDWR); + ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); + err = ffurl_open(&hd, buf, AVIO_FLAG_READ_WRITE); if (err < 0) goto fail; s->hd = hd; - if (http_connect(h, path, hoststr) < 0) + cur_auth_type = s->auth_state.auth_type; + if (http_connect(h, path, hoststr, auth, &location_changed) < 0) goto fail; - if (s->http_code == 303 && s->location[0] != '\0') { + if (s->http_code == 401) { + if (cur_auth_type == HTTP_AUTH_NONE && s->auth_state.auth_type != HTTP_AUTH_NONE) { + ffurl_close(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 */ - uri = s->location; - url_close(hd); + ffurl_close(hd); + if (redirects++ >= MAX_REDIRECTS) + return AVERROR(EIO); + location_changed = 0; goto redo; } return 0; fail: if (hd) - url_close(hd); - av_free(s); - return -EIO; + ffurl_close(hd); + s->hd = NULL; + return AVERROR(EIO); } +static int http_open(URLContext *h, const char *uri, int flags) +{ + HTTPContext *s = h->priv_data; + + h->is_streamed = 1; + + s->filesize = -1; + av_strlcpy(s->location, uri, sizeof(s->location)); + + return http_open_cnx(h); +} static int http_getc(HTTPContext *s) { int len; if (s->buf_ptr >= s->buf_end) { - len = url_read(s->hd, s->buffer, BUFFER_SIZE); + len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); if (len < 0) { - return -EIO; + return AVERROR(EIO); } else if (len == 0) { return -1; } else { @@ -137,10 +187,36 @@ static int http_getc(HTTPContext *s) return *s->buf_ptr++; } -static int process_line(HTTPContext *s, char *line, int line_count) +static int http_get_line(HTTPContext *s, char *line, int line_size) { - char *tag, *p; - + int ch; + char *q; + + q = line; + for(;;) { + ch = http_getc(s); + if (ch < 0) + return AVERROR(EIO); + 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') return 0; @@ -151,140 +227,294 @@ static int process_line(HTTPContext *s, char *line, int line_count) p++; while (isspace(*p)) p++; - s->http_code = strtol(p, NULL, 10); -#ifdef DEBUG - printf("http_code=%d\n", s->http_code); -#endif + 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) { + 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 != ':') + if (*p != ':') return 1; - + *p = '\0'; tag = line; p++; while (isspace(*p)) p++; - if (!strcmp(tag, "Location")) { + if (!strcasecmp(tag, "Location")) { strcpy(s->location, p); + *new_location = 1; + } else if (!strcasecmp (tag, "Content-Length") && s->filesize == -1) { + s->filesize = atoll(p); + } else if (!strcasecmp (tag, "Content-Range")) { + /* "bytes $from-$to/$document_size" */ + const char *slash; + if (!strncmp (p, "bytes ", 6)) { + p += 6; + s->off = atoll(p); + if ((slash = strchr(p, '/')) && strlen(slash) > 0) + s->filesize = atoll(slash+1); + } + h->is_streamed = 0; /* we _can_ in fact seek */ + } else if (!strcasecmp (tag, "Transfer-Encoding") && !strncasecmp(p, "chunked", 7)) { + s->filesize = -1; + s->chunksize = 0; + } else if (!strcasecmp (tag, "WWW-Authenticate")) { + ff_http_auth_handle_header(&s->auth_state, tag, p); + } else if (!strcasecmp (tag, "Authentication-Info")) { + ff_http_auth_handle_header(&s->auth_state, tag, p); + } else if (!strcasecmp (tag, "Connection")) { + if (!strcmp(p, "close")) + s->willclose = 1; } } return 1; } -static int http_connect(URLContext *h, const char *path, const char *hoststr) +static inline int has_header(const char *str, const char *header) +{ + /* header + 2 to skip over CRLF prefix. (make sure you have one!) */ + return av_stristart(str, header + 2, NULL) || av_stristr(str, header); +} + +static int http_connect(URLContext *h, const char *path, const char *hoststr, + const char *auth, int *new_location) { HTTPContext *s = h->priv_data; - int post, err, ch; - char line[1024], *q; + int post, err; + char line[1024]; + char headers[1024] = ""; + char *authstr = NULL; + int64_t off = s->off; + int len = 0; /* send http header */ - post = h->flags & URL_WRONLY; + post = h->flags & AVIO_FLAG_WRITE; + authstr = ff_http_auth_create_response(&s->auth_state, auth, path, + post ? "POST" : "GET"); + + /* 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", LIBAVFORMAT_IDENT); + if (!has_header(s->headers, "\r\nAccept: ")) + len += av_strlcpy(headers + len, "Accept: */*\r\n", + sizeof(headers) - len); + if (!has_header(s->headers, "\r\nRange: ")) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Range: bytes=%"PRId64"-\r\n", s->off); + if (!has_header(s->headers, "\r\nConnection: ")) + 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); + + /* now add in custom headers */ + av_strlcpy(headers+len, s->headers, sizeof(headers)-len); snprintf(s->buffer, sizeof(s->buffer), - "%s %s HTTP/1.0\n" - "User-Agent: FFmpeg %s\n" - "Accept: */*\n" - "Host: %s\n" - "\n", + "%s %s HTTP/1.1\r\n" + "%s" + "%s" + "%s" + "\r\n", post ? "POST" : "GET", path, - LIBAVFORMAT_VERSION, - hoststr); - - if (http_write(h, s->buffer, strlen(s->buffer)) < 0) - return -EIO; - + post && s->chunksize >= 0 ? "Transfer-Encoding: chunked\r\n" : "", + headers, + authstr ? authstr : ""); + + av_freep(&authstr); + if (ffurl_write(s->hd, s->buffer, strlen(s->buffer)) < 0) + return AVERROR(EIO); + /* init input buffer */ s->buf_ptr = s->buffer; s->buf_end = s->buffer; s->line_count = 0; - s->location[0] = '\0'; + s->off = 0; + s->filesize = -1; + s->willclose = 0; if (post) { - sleep(1); + /* 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; } - + s->chunksize = -1; + /* wait for header */ - q = line; for(;;) { - ch = http_getc(s); - if (ch < 0) - return -EIO; - if (ch == '\n') { - /* process line */ - if (q > line && q[-1] == '\r') - q--; - *q = '\0'; -#ifdef DEBUG - printf("header='%s'\n", line); -#endif - err = process_line(s, line, s->line_count); - if (err < 0) - return err; - if (err == 0) - return 0; - s->line_count++; - q = line; - } else { - if ((q - line) < sizeof(line) - 1) - *q++ = ch; - } + if (http_get_line(s, line, sizeof(line)) < 0) + return AVERROR(EIO); + + 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 (off == s->off) ? 0 : -1; } static int http_read(URLContext *h, uint8_t *buf, int size) { HTTPContext *s = h->priv_data; - int size1, len; - - size1 = size; - while (size > 0) { - /* 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 { - len = url_read (s->hd, buf, size); - if (len < 0) { - return len; - } else if (len == 0) { + int len; + + if (s->chunksize >= 0) { + if (!s->chunksize) { + char line[32]; + + for(;;) { + do { + if (http_get_line(s, line, sizeof(line)) < 0) + return AVERROR(EIO); + } 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 -= len; - buf += len; + size = FFMIN(size, s->chunksize); } - return size1 - size; + /* 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; } /* used only when posting data */ -static int http_write(URLContext *h, uint8_t *buf, int size) +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; - return url_write(s->hd, buf, size); + + if (s->chunksize == -1) { + /* 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_close(URLContext *h) { + int ret = 0; + char footer[] = "0\r\n\r\n"; HTTPContext *s = h->priv_data; - url_close(s->hd); - av_free(s); - return 0; + + /* signal end of chunked encoding if used */ + if ((h->flags & AVIO_FLAG_WRITE) && s->chunksize != -1) { + ret = ffurl_write(s->hd, footer, sizeof(footer) - 1); + ret = ret > 0 ? 0 : ret; + } + + if (s->hd) + ffurl_close(s->hd); + return ret; } -URLProtocol http_protocol = { - "http", - http_open, - http_read, - http_write, - NULL, /* seek */ - http_close, -}; +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); +} + +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, + .priv_data_size = sizeof(HTTPContext), + .priv_data_class = &httpcontext_class, +};