ffserver.c

            return 0;
        len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
        if (len < 0) {
            if (ff_neterrno() != AVERROR(EAGAIN) &&
                ff_neterrno() != AVERROR(EINTR)) {
                /* error : close connection */
                av_freep(&c->pb_buffer);
                return -1;
            }
        } else {
            c->buffer_ptr += len;
            if (c->stream)
                c->stream->bytes_served += len;
            c->data_count += len;
            if (c->buffer_ptr >= c->buffer_end) {
                av_freep(&c->pb_buffer);
                /* if error, exit */
                if (c->http_error)
                    return -1;
                /* all the buffer was sent : synchronize to the incoming
                 * stream */
                c->state = HTTPSTATE_SEND_DATA_HEADER;
                c->buffer_ptr = c->buffer_end = c->buffer;
            }
        }
        break;

    case HTTPSTATE_SEND_DATA:
    case HTTPSTATE_SEND_DATA_HEADER:
    case HTTPSTATE_SEND_DATA_TRAILER:
        /* for packetized output, we consider we can always write (the
           input streams set the speed). It may be better to verify
           that we do not rely too much on the kernel queues */
        if (!c->is_packetized) {
            if (c->poll_entry->revents & (POLLERR | POLLHUP))
                return -1;

            /* no need to read if no events */
            if (!(c->poll_entry->revents & POLLOUT))
                return 0;
        }
        if (http_send_data(c) < 0)
            return -1;
        /* close connection if trailer sent */
        if (c->state == HTTPSTATE_SEND_DATA_TRAILER)
            return -1;
        break;
    case HTTPSTATE_RECEIVE_DATA:
        /* no need to read if no events */
        if (c->poll_entry->revents & (POLLERR | POLLHUP))
            return -1;
        if (!(c->poll_entry->revents & POLLIN))
            return 0;
        if (http_receive_data(c) < 0)
            return -1;
        break;
    case HTTPSTATE_WAIT_FEED:
        /* no need to read if no events */
        if (c->poll_entry->revents & (POLLIN | POLLERR | POLLHUP))
            return -1;

        /* nothing to do, we'll be waken up by incoming feed packets */
        break;

    case RTSPSTATE_SEND_REPLY:
        if (c->poll_entry->revents & (POLLERR | POLLHUP)) {
            av_freep(&c->pb_buffer);
            return -1;
        }
        /* no need to write if no events */
        if (!(c->poll_entry->revents & POLLOUT))
            return 0;
        len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
        if (len < 0) {
            if (ff_neterrno() != AVERROR(EAGAIN) &&
                ff_neterrno() != AVERROR(EINTR)) {
                /* error : close connection */
                av_freep(&c->pb_buffer);
                return -1;
            }
        } else {
            c->buffer_ptr += len;
            c->data_count += len;
            if (c->buffer_ptr >= c->buffer_end) {
                /* all the buffer was sent : wait for a new request */
                av_freep(&c->pb_buffer);
                start_wait_request(c, 1);
            }
        }
        break;
    case RTSPSTATE_SEND_PACKET:
        if (c->poll_entry->revents & (POLLERR | POLLHUP)) {
            av_freep(&c->packet_buffer);
            return -1;
        }
        /* no need to write if no events */
        if (!(c->poll_entry->revents & POLLOUT))
            return 0;
        len = send(c->fd, c->packet_buffer_ptr,
                    c->packet_buffer_end - c->packet_buffer_ptr, 0);
        if (len < 0) {
            if (ff_neterrno() != AVERROR(EAGAIN) &&
                ff_neterrno() != AVERROR(EINTR)) {
                /* error : close connection */
                av_freep(&c->packet_buffer);
                return -1;
            }
        } else {
            c->packet_buffer_ptr += len;
            if (c->packet_buffer_ptr >= c->packet_buffer_end) {
                /* all the buffer was sent : wait for a new request */
                av_freep(&c->packet_buffer);
                c->state = RTSPSTATE_WAIT_REQUEST;
            }
        }
        break;
    case HTTPSTATE_READY:
        /* nothing to do */
        break;
    default:
        return -1;
    }
    return 0;
}

static int extract_rates(char *rates, int ratelen, const char *request)
{
    const char *p;

    for (p = request; *p && *p != '\r' && *p != '\n'; ) {
        if (av_strncasecmp(p, "Pragma:", 7) == 0) {
            const char *q = p + 7;

            while (*q && *q != '\n' && av_isspace(*q))
                q++;

            if (av_strncasecmp(q, "stream-switch-entry=", 20) == 0) {
                int stream_no;
                int rate_no;

                q += 20;

                memset(rates, 0xff, ratelen);

                while (1) {
                    while (*q && *q != '\n' && *q != ':')
                        q++;

                    if (sscanf(q, ":%d:%d", &stream_no, &rate_no) != 2)
                        break;

                    stream_no--;
                    if (stream_no < ratelen && stream_no >= 0)
                        rates[stream_no] = rate_no;

                    while (*q && *q != '\n' && !av_isspace(*q))
                        q++;
                }

                return 1;
            }
        }
        p = strchr(p, '\n');
        if (!p)
            break;

        p++;
    }

    return 0;
}

static int find_stream_in_feed(FFStream *feed, AVCodecContext *codec, int bit_rate)
{
    int i;
    int best_bitrate = 100000000;
    int best = -1;

    for (i = 0; i < feed->nb_streams; i++) {
        AVCodecContext *feed_codec = feed->streams[i]->codec;

        if (feed_codec->codec_id != codec->codec_id ||
            feed_codec->sample_rate != codec->sample_rate ||
            feed_codec->width != codec->width ||
            feed_codec->height != codec->height)
            continue;

        /* Potential stream */

        /* We want the fastest stream less than bit_rate, or the slowest
         * faster than bit_rate
         */

        if (feed_codec->bit_rate <= bit_rate) {
            if (best_bitrate > bit_rate || feed_codec->bit_rate > best_bitrate) {
                best_bitrate = feed_codec->bit_rate;
                best = i;
            }
        } else {
            if (feed_codec->bit_rate < best_bitrate) {
                best_bitrate = feed_codec->bit_rate;
                best = i;
            }
        }
    }

    return best;
}

static int modify_current_stream(HTTPContext *c, char *rates)
{
    int i;
    FFStream *req = c->stream;
    int action_required = 0;

    /* Not much we can do for a feed */
    if (!req->feed)
        return 0;

    for (i = 0; i < req->nb_streams; i++) {
        AVCodecContext *codec = req->streams[i]->codec;

        switch(rates[i]) {
            case 0:
                c->switch_feed_streams[i] = req->feed_streams[i];
                break;
            case 1:
                c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 2);
                break;
            case 2:
                /* Wants off or slow */
                c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 4);
#ifdef WANTS_OFF
                /* This doesn't work well when it turns off the only stream! */
                c->switch_feed_streams[i] = -2;
                c->feed_streams[i] = -2;
#endif
                break;
        }

        if (c->switch_feed_streams[i] >= 0 && c->switch_feed_streams[i] != c->feed_streams[i])
            action_required = 1;
    }

    return action_required;
}

/* XXX: factorize in utils.c ? */
/* XXX: take care with different space meaning */
static void skip_spaces(const char **pp)
{
    const char *p;
    p = *pp;
    while (*p == ' ' || *p == '\t')
        p++;
    *pp = p;
}

static void get_word(char *buf, int buf_size, const char **pp)
{
    const char *p;
    char *q;

    p = *pp;
    skip_spaces(&p);
    q = buf;
    while (!av_isspace(*p) && *p != '\0') {
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    if (buf_size > 0)
        *q = '\0';
    *pp = p;
}

static void get_arg(char *buf, int buf_size, const char **pp)
{
    const char *p;
    char *q;
    int quote;

    p = *pp;
    while (av_isspace(*p)) p++;
    q = buf;
    quote = 0;
    if (*p == '\"' || *p == '\'')
        quote = *p++;
    for(;;) {
        if (quote) {
            if (*p == quote)
                break;
        } else {
            if (av_isspace(*p))
                break;
        }
        if (*p == '\0')
            break;
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    *q = '\0';
    if (quote && *p == quote)
        p++;
    *pp = p;
}

static void parse_acl_row(FFStream *stream, FFStream* feed, IPAddressACL *ext_acl,
                         const char *p, const char *filename, int line_num)
{
    char arg[1024];
    IPAddressACL acl;
    int errors = 0;

    get_arg(arg, sizeof(arg), &p);
    if (av_strcasecmp(arg, "allow") == 0)
        acl.action = IP_ALLOW;
    else if (av_strcasecmp(arg, "deny") == 0)
        acl.action = IP_DENY;
    else {
        fprintf(stderr, "%s:%d: ACL action '%s' is not ALLOW or DENY\n",
                filename, line_num, arg);
        errors++;
    }

    get_arg(arg, sizeof(arg), &p);

    if (resolve_host(&acl.first, arg) != 0) {
        fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
                filename, line_num, arg);
        errors++;
    } else
        acl.last = acl.first;

    get_arg(arg, sizeof(arg), &p);

    if (arg[0]) {
        if (resolve_host(&acl.last, arg) != 0) {
            fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
                    filename, line_num, arg);
            errors++;
        }
    }

    if (!errors) {
        IPAddressACL *nacl = av_mallocz(sizeof(*nacl));
        IPAddressACL **naclp = 0;

        acl.next = 0;
        *nacl = acl;

        if (stream)
            naclp = &stream->acl;
        else if (feed)
            naclp = &feed->acl;
        else if (ext_acl)
            naclp = &ext_acl;
        else {
            fprintf(stderr, "%s:%d: ACL found not in <stream> or <feed>\n",
                    filename, line_num);
            errors++;
        }

        if (naclp) {
            while (*naclp)
                naclp = &(*naclp)->next;

            *naclp = nacl;
        }
    }
}


static IPAddressACL* parse_dynamic_acl(FFStream *stream, HTTPContext *c)
{
    FILE* f;
    char line[1024];
    char  cmd[1024];
    IPAddressACL *acl = NULL;
    int line_num = 0;
    const char *p;

    f = fopen(stream->dynamic_acl, "r");
    if (!f) {
        perror(stream->dynamic_acl);
        return NULL;
    }

    acl = av_mallocz(sizeof(IPAddressACL));

    /* Build ACL */
    for(;;) {
        if (fgets(line, sizeof(line), f) == NULL)
            break;
        line_num++;
        p = line;
        while (av_isspace(*p))
            p++;
        if (*p == '\0' || *p == '#')
            continue;
        get_arg(cmd, sizeof(cmd), &p);

        if (!av_strcasecmp(cmd, "ACL"))
            parse_acl_row(NULL, NULL, acl, p, stream->dynamic_acl, line_num);
    }
    fclose(f);
    return acl;
}


static void free_acl_list(IPAddressACL *in_acl)
{
    IPAddressACL *pacl,*pacl2;

    pacl = in_acl;
    while(pacl) {
        pacl2 = pacl;
        pacl = pacl->next;
        av_freep(pacl2);
    }
}

static int validate_acl_list(IPAddressACL *in_acl, HTTPContext *c)
{
    enum IPAddressAction last_action = IP_DENY;
    IPAddressACL *acl;
    struct in_addr *src = &c->from_addr.sin_addr;
    unsigned long src_addr = src->s_addr;

    for (acl = in_acl; acl; acl = acl->next) {
        if (src_addr >= acl->first.s_addr && src_addr <= acl->last.s_addr)
            return (acl->action == IP_ALLOW) ? 1 : 0;
        last_action = acl->action;
    }

    /* Nothing matched, so return not the last action */
    return (last_action == IP_DENY) ? 1 : 0;
}

static int validate_acl(FFStream *stream, HTTPContext *c)
{
    int ret = 0;
    IPAddressACL *acl;


    /* if stream->acl is null validate_acl_list will return 1 */
    ret = validate_acl_list(stream->acl, c);

    if (stream->dynamic_acl[0]) {
        acl = parse_dynamic_acl(stream, c);

        ret = validate_acl_list(acl, c);

        free_acl_list(acl);
    }

    return ret;
}

/* compute the real filename of a file by matching it without its
   extensions to all the stream's filenames */
static void compute_real_filename(char *filename, int max_size)
{
    char file1[1024];
    char file2[1024];
    char *p;
    FFStream *stream;

    /* compute filename by matching without the file extensions */
    av_strlcpy(file1, filename, sizeof(file1));
    p = strrchr(file1, '.');
    if (p)
        *p = '\0';
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        av_strlcpy(file2, stream->filename, sizeof(file2));
        p = strrchr(file2, '.');
        if (p)
            *p = '\0';
        if (!strcmp(file1, file2)) {
            av_strlcpy(filename, stream->filename, max_size);
            break;
        }
    }
}

enum RedirType {
    REDIR_NONE,
    REDIR_ASX,
    REDIR_RAM,
    REDIR_ASF,
    REDIR_RTSP,
    REDIR_SDP,
};

/* parse HTTP request and prepare header */
static int http_parse_request(HTTPContext *c)
{
    const char *p;
    char *p1;
    enum RedirType redir_type;
    char cmd[32];
    char info[1024], filename[1024];
    char url[1024], *q;
    char protocol[32];
    char msg[1024];
    const char *mime_type;
    FFStream *stream;
    int i;
    char ratebuf[32];
    const char *useragent = 0;

    p = c->buffer;
    get_word(cmd, sizeof(cmd), &p);
    av_strlcpy(c->method, cmd, sizeof(c->method));

    if (!strcmp(cmd, "GET"))
        c->post = 0;
    else if (!strcmp(cmd, "POST"))
        c->post = 1;
    else
        return -1;

    get_word(url, sizeof(url), &p);
    av_strlcpy(c->url, url, sizeof(c->url));

    get_word(protocol, sizeof(protocol), (const char **)&p);
    if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
        return -1;

    av_strlcpy(c->protocol, protocol, sizeof(c->protocol));

    if (ffserver_debug)
        http_log("%s - - New connection: %s %s\n", inet_ntoa(c->from_addr.sin_addr), cmd, url);

    /* find the filename and the optional info string in the request */
    p1 = strchr(url, '?');
    if (p1) {
        av_strlcpy(info, p1, sizeof(info));
        *p1 = '\0';
    } else
        info[0] = '\0';

    av_strlcpy(filename, url + ((*url == '/') ? 1 : 0), sizeof(filename)-1);

    for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
        if (av_strncasecmp(p, "User-Agent:", 11) == 0) {
            useragent = p + 11;
            if (*useragent && *useragent != '\n' && av_isspace(*useragent))
                useragent++;
            break;
        }
        p = strchr(p, '\n');
        if (!p)
            break;

        p++;
    }

    redir_type = REDIR_NONE;
    if (av_match_ext(filename, "asx")) {
        redir_type = REDIR_ASX;
        filename[strlen(filename)-1] = 'f';
    } else if (av_match_ext(filename, "asf") &&
        (!useragent || av_strncasecmp(useragent, "NSPlayer", 8) != 0)) {
        /* if this isn't WMP or lookalike, return the redirector file */
        redir_type = REDIR_ASF;
    } else if (av_match_ext(filename, "rpm,ram")) {
        redir_type = REDIR_RAM;
        strcpy(filename + strlen(filename)-2, "m");
    } else if (av_match_ext(filename, "rtsp")) {
        redir_type = REDIR_RTSP;
        compute_real_filename(filename, sizeof(filename) - 1);
    } else if (av_match_ext(filename, "sdp")) {
        redir_type = REDIR_SDP;
        compute_real_filename(filename, sizeof(filename) - 1);
    }

    // "redirect" / request to index.html
    if (!strlen(filename))
        av_strlcpy(filename, "index.html", sizeof(filename) - 1);

    stream = first_stream;
    while (stream != NULL) {
        if (!strcmp(stream->filename, filename) && validate_acl(stream, c))
            break;
        stream = stream->next;
    }
    if (stream == NULL) {
        snprintf(msg, sizeof(msg), "File '%s' not found", url);
        http_log("File '%s' not found\n", url);
        goto send_error;
    }

    c->stream = stream;
    memcpy(c->feed_streams, stream->feed_streams, sizeof(c->feed_streams));
    memset(c->switch_feed_streams, -1, sizeof(c->switch_feed_streams));

    if (stream->stream_type == STREAM_TYPE_REDIRECT) {
        c->http_error = 301;
        q = c->buffer;
        snprintf(q, c->buffer_size,
                      "HTTP/1.0 301 Moved\r\n"
                      "Location: %s\r\n"
                      "Content-type: text/html\r\n"
                      "\r\n"
                      "<html><head><title>Moved</title></head><body>\r\n"
                      "You should be <a href=\"%s\">redirected</a>.\r\n"
                      "</body></html>\r\n", stream->feed_filename, stream->feed_filename);
        q += strlen(q);
        /* prepare output buffer */
        c->buffer_ptr = c->buffer;
        c->buffer_end = q;
        c->state = HTTPSTATE_SEND_HEADER;
        return 0;
    }

    /* If this is WMP, get the rate information */
    if (extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
        if (modify_current_stream(c, ratebuf)) {
            for (i = 0; i < FF_ARRAY_ELEMS(c->feed_streams); i++) {
                if (c->switch_feed_streams[i] >= 0)
                    c->switch_feed_streams[i] = -1;
            }
        }
    }

    if (c->post == 0 && stream->stream_type == STREAM_TYPE_LIVE)
        current_bandwidth += stream->bandwidth;

    /* If already streaming this feed, do not let start another feeder. */
    if (stream->feed_opened) {
        snprintf(msg, sizeof(msg), "This feed is already being received.");
        http_log("Feed '%s' already being received\n", stream->feed_filename);
        goto send_error;
    }

    if (c->post == 0 && max_bandwidth < current_bandwidth) {
        c->http_error = 503;
        q = c->buffer;
        snprintf(q, c->buffer_size,
                      "HTTP/1.0 503 Server too busy\r\n"
                      "Content-type: text/html\r\n"
                      "\r\n"
                      "<html><head><title>Too busy</title></head><body>\r\n"
                      "<p>The server is too busy to serve your request at this time.</p>\r\n"
                      "<p>The bandwidth being served (including your stream) is %"PRIu64"kbit/sec, "
                      "and this exceeds the limit of %"PRIu64"kbit/sec.</p>\r\n"
                      "</body></html>\r\n", current_bandwidth, max_bandwidth);
        q += strlen(q);
        /* prepare output buffer */
        c->buffer_ptr = c->buffer;
        c->buffer_end = q;
        c->state = HTTPSTATE_SEND_HEADER;
        return 0;
    }

    if (redir_type != REDIR_NONE) {
        const char *hostinfo = 0;

        for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
            if (av_strncasecmp(p, "Host:", 5) == 0) {
                hostinfo = p + 5;
                break;
            }
            p = strchr(p, '\n');
            if (!p)
                break;

            p++;
        }

        if (hostinfo) {
            char *eoh;
            char hostbuf[260];

            while (av_isspace(*hostinfo))
                hostinfo++;

            eoh = strchr(hostinfo, '\n');
            if (eoh) {
                if (eoh[-1] == '\r')
                    eoh--;

                if (eoh - hostinfo < sizeof(hostbuf) - 1) {
                    memcpy(hostbuf, hostinfo, eoh - hostinfo);
                    hostbuf[eoh - hostinfo] = 0;

                    c->http_error = 200;
                    q = c->buffer;
                    switch(redir_type) {
                    case REDIR_ASX:
                        snprintf(q, c->buffer_size,
                                      "HTTP/1.0 200 ASX Follows\r\n"
                                      "Content-type: video/x-ms-asf\r\n"
                                      "\r\n"
                                      "<ASX Version=\"3\">\r\n"
                                      //"<!-- Autogenerated by ffserver -->\r\n"
                                      "<ENTRY><REF HREF=\"http://%s/%s%s\"/></ENTRY>\r\n"
                                      "</ASX>\r\n", hostbuf, filename, info);
                        q += strlen(q);
                        break;
                    case REDIR_RAM:
                        snprintf(q, c->buffer_size,
                                      "HTTP/1.0 200 RAM Follows\r\n"
                                      "Content-type: audio/x-pn-realaudio\r\n"
                                      "\r\n"
                                      "# Autogenerated by ffserver\r\n"
                                      "http://%s/%s%s\r\n", hostbuf, filename, info);
                        q += strlen(q);
                        break;
                    case REDIR_ASF:
                        snprintf(q, c->buffer_size,
                                      "HTTP/1.0 200 ASF Redirect follows\r\n"
                                      "Content-type: video/x-ms-asf\r\n"
                                      "\r\n"
                                      "[Reference]\r\n"
                                      "Ref1=http://%s/%s%s\r\n", hostbuf, filename, info);
                        q += strlen(q);
                        break;
                    case REDIR_RTSP:
                        {
                            char hostname[256], *p;
                            /* extract only hostname */
                            av_strlcpy(hostname, hostbuf, sizeof(hostname));
                            p = strrchr(hostname, ':');
                            if (p)
                                *p = '\0';
                            snprintf(q, c->buffer_size,
                                          "HTTP/1.0 200 RTSP Redirect follows\r\n"
                                          /* XXX: incorrect mime type ? */
                                          "Content-type: application/x-rtsp\r\n"
                                          "\r\n"
                                          "rtsp://%s:%d/%s\r\n", hostname, ntohs(my_rtsp_addr.sin_port), filename);
                            q += strlen(q);
                        }
                        break;
                    case REDIR_SDP:
                        {
                            uint8_t *sdp_data;
                            int sdp_data_size;
                            socklen_t len;
                            struct sockaddr_in my_addr;

                            snprintf(q, c->buffer_size,
                                          "HTTP/1.0 200 OK\r\n"
                                          "Content-type: application/sdp\r\n"
                                          "\r\n");
                            q += strlen(q);

                            len = sizeof(my_addr);
                            getsockname(c->fd, (struct sockaddr *)&my_addr, &len);

                            /* XXX: should use a dynamic buffer */
                            sdp_data_size = prepare_sdp_description(stream,
                                                                    &sdp_data,
                                                                    my_addr.sin_addr);
                            if (sdp_data_size > 0) {
                                memcpy(q, sdp_data, sdp_data_size);
                                q += sdp_data_size;
                                *q = '\0';
                                av_free(sdp_data);
                            }
                        }
                        break;
                    default:
                        abort();
                        break;
                    }

                    /* prepare output buffer */
                    c->buffer_ptr = c->buffer;
                    c->buffer_end = q;
                    c->state = HTTPSTATE_SEND_HEADER;
                    return 0;
                }
            }
        }

        snprintf(msg, sizeof(msg), "ASX/RAM file not handled");
        goto send_error;
    }

    stream->conns_served++;

    /* XXX: add there authenticate and IP match */

    if (c->post) {
        /* if post, it means a feed is being sent */
        if (!stream->is_feed) {
            /* However it might be a status report from WMP! Let us log the
             * data as it might come in handy one day. */
            const char *logline = 0;
            int client_id = 0;

            for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
                if (av_strncasecmp(p, "Pragma: log-line=", 17) == 0) {
                    logline = p;
                    break;
                }
                if (av_strncasecmp(p, "Pragma: client-id=", 18) == 0)
                    client_id = strtol(p + 18, 0, 10);
                p = strchr(p, '\n');
                if (!p)
                    break;

                p++;
            }

            if (logline) {
                char *eol = strchr(logline, '\n');

                logline += 17;

                if (eol) {
                    if (eol[-1] == '\r')
                        eol--;
                    http_log("%.*s\n", (int) (eol - logline), logline);
                    c->suppress_log = 1;
                }
            }

#ifdef DEBUG
            http_log("\nGot request:\n%s\n", c->buffer);
#endif

            if (client_id && extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
                HTTPContext *wmpc;

                /* Now we have to find the client_id */
                for (wmpc = first_http_ctx; wmpc; wmpc = wmpc->next) {
                    if (wmpc->wmp_client_id == client_id)
                        break;
                }

                if (wmpc && modify_current_stream(wmpc, ratebuf))
                    wmpc->switch_pending = 1;
            }

            snprintf(msg, sizeof(msg), "POST command not handled");
            c->stream = 0;
            goto send_error;
        }
        if (http_start_receive_data(c) < 0) {
            snprintf(msg, sizeof(msg), "could not open feed");
            goto send_error;
        }
        c->http_error = 0;
        c->state = HTTPSTATE_RECEIVE_DATA;
        return 0;
    }

#ifdef DEBUG
    if (strcmp(stream->filename + strlen(stream->filename) - 4, ".asf") == 0)
        http_log("\nGot request:\n%s\n", c->buffer);
#endif

    if (c->stream->stream_type == STREAM_TYPE_STATUS)
        goto send_status;

    /* open input stream */
    if (open_input_stream(c, info) < 0) {
        snprintf(msg, sizeof(msg), "Input stream corresponding to '%s' not found", url);
        goto send_error;
    }

    /* prepare HTTP header */
    c->buffer[0] = 0;
    av_strlcatf(c->buffer, c->buffer_size, "HTTP/1.0 200 OK\r\n");
    mime_type = c->stream->fmt->mime_type;
    if (!mime_type)
        mime_type = "application/x-octet-stream";
    av_strlcatf(c->buffer, c->buffer_size, "Pragma: no-cache\r\n");

    /* for asf, we need extra headers */
    if (!strcmp(c->stream->fmt->name,"asf_stream")) {
        /* Need to allocate a client id */

        c->wmp_client_id = av_lfg_get(&random_state);

        av_strlcatf(c->buffer, c->buffer_size, "Server: Cougar 4.1.0.3923\r\nCache-Control: no-cache\r\nPragma: client-id=%d\r\nPragma: features=\"broadcast\"\r\n", c->wmp_client_id);
    }
    av_strlcatf(c->buffer, c->buffer_size, "Content-Type: %s\r\n", mime_type);
    av_strlcatf(c->buffer, c->buffer_size, "\r\n");
    q = c->buffer + strlen(c->buffer);

    /* prepare output buffer */
    c->http_error = 0;
    c->buffer_ptr = c->buffer;
    c->buffer_end = q;
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
 send_error:
    c->http_error = 404;
    q = c->buffer;
    htmlstrip(msg);
    snprintf(q, c->buffer_size,
                  "HTTP/1.0 404 Not Found\r\n"
                  "Content-type: text/html\r\n"
                  "\r\n"
                  "<html>\n"
                  "<head><title>404 Not Found</title></head>\n"
                  "<body>%s</body>\n"
                  "</html>\n", msg);
    q += strlen(q);
    /* prepare output buffer */
    c->buffer_ptr = c->buffer;
    c->buffer_end = q;
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
 send_status:
    compute_status(c);
    c->http_error = 200; /* horrible : we use this value to avoid
                            going to the send data state */
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
}

static void fmt_bytecount(AVIOContext *pb, int64_t count)
{
    static const char suffix[] = " kMGTP";
    const char *s;

    for (s = suffix; count >= 100000 && s[1]; count /= 1000, s++);

    avio_printf(pb, "%"PRId64"%c", count, *s);
}

static void compute_status(HTTPContext *c)
{
    HTTPContext *c1;
    FFStream *stream;
    char *p;
    time_t ti;
    int i, len;
    AVIOContext *pb;

    if (avio_open_dyn_buf(&pb) < 0) {
        /* XXX: return an error ? */
        c->buffer_ptr = c->buffer;
        c->buffer_end = c->buffer;
        return;
    }

    avio_printf(pb, "HTTP/1.0 200 OK\r\n");
    avio_printf(pb, "Content-type: %s\r\n", "text/html");
    avio_printf(pb, "Pragma: no-cache\r\n");
    avio_printf(pb, "\r\n");

    avio_printf(pb, "<html><head><title>%s Status</title>\n", program_name);
    if (c->stream->feed_filename[0])
        avio_printf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n", c->stream->feed_filename);
    avio_printf(pb, "</head>\n<body>");
    avio_printf(pb, "<h1>%s Status</h1>\n", program_name);
    /* format status */
    avio_printf(pb, "<h2>Available Streams</h2>\n");
    avio_printf(pb, "<table cellspacing=0 cellpadding=4>\n");
    avio_printf(pb, "<tr><th valign=top>Path<th align=left>Served<br>Conns<th><br>bytes<th valign=top>Format<th>Bit rate<br>kbits/s<th align=left>Video<br>kbits/s<th><br>Codec<th align=left>Audio<br>kbits/s<th><br>Codec<th align=left valign=top>Feed\n");
    stream = first_stream;
    while (stream != NULL) {
        char sfilename[1024];
        char *eosf;

        if (stream->feed != stream) {
            av_strlcpy(sfilename, stream->filename, sizeof(sfilename) - 10);
            eosf = sfilename + strlen(sfilename);
            if (eosf - sfilename >= 4) {
                if (strcmp(eosf - 4, ".asf") == 0)
                    strcpy(eosf - 4, ".asx");
                else if (strcmp(eosf - 3, ".rm") == 0)
                    strcpy(eosf - 3, ".ram");
                else if (stream->fmt && !strcmp(stream->fmt->name, "rtp")) {
                    /* generate a sample RTSP director if
                       unicast. Generate an SDP redirector if
                       multicast */
                    eosf = strrchr(sfilename, '.');
                    if (!eosf)
                        eosf = sfilename + strlen(sfilename);
                    if (stream->is_multicast)
                        strcpy(eosf, ".sdp");
                    else
                        strcpy(eosf, ".rtsp");
                }
            }

            avio_printf(pb, "<tr><td><a href=\"/%s\">%s</a> ",
                         sfilename, stream->filename);
            avio_printf(pb, "<td align=right> %d <td align=right> ",
                        stream->conns_served);
            fmt_bytecount(pb, stream->bytes_served);
            switch(stream->stream_type) {
            case STREAM_TYPE_LIVE: {
                    int audio_bit_rate = 0;
                    int video_bit_rate = 0;
                    const char *audio_codec_name = "";
                    const char *video_codec_name = "";
                    const char *audio_codec_name_extra = "";
                    const char *video_codec_name_extra = "";

                    for(i=0;i<stream->nb_streams;i++) {