Function http_connect

libavformat/http.c:1527–1708

}

static int http_connect(URLContext *h, const char *path, const char *local_path,
                        const char *hoststr, const char *auth,
                        const char *proxyauth)
{
    HTTPContext *s = h->priv_data;
    int post, err;
    AVBPrint request;
    char *authstr = NULL, *proxyauthstr = NULL;
    uint64_t off = s->off;
    const char *method;
    int send_expect_100 = 0;

    av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));

    /* 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;
    }

    if (s->method)
        method = s->method;
    else
        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);

     if (post && !s->post_data) {
        if (s->send_expect_100 != -1) {
            send_expect_100 = s->send_expect_100;
        } else {
            send_expect_100 = 0;
            /* The user has supplied authentication but we don't know the auth type,
             * send Expect: 100-continue to get the 401 response including the
             * WWW-Authenticate header, or an 100 continue if no auth actually
             * is needed. */
            if (auth && *auth &&
                s->auth_state.auth_type == HTTP_AUTH_NONE &&
                s->http_code != 401)
                send_expect_100 = 1;
        }
    }

    av_bprintf(&request, "%s ", method);
    bprint_escaped_path(&request, path);
    av_bprintf(&request, " HTTP/1.1\r\n");

    if (post && s->chunked_post)
        av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
    /* set default headers if needed */
    if (!has_header(s->headers, "\r\nUser-Agent: "))