From 3240e69de6d37155bfdaf61a9828bfa0a296c326 Mon Sep 17 00:00:00 2001 From: Stephan Holljes Date: Fri, 3 Jul 2015 02:28:56 +0200 Subject: [PATCH] lavf/http: Implement server side network code. add http_accept, add http_handshake and move handshake logic there, handle connection closing. Signed-off-by: Stephan Holljes --- libavformat/http.c | 182 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 158 insertions(+), 24 deletions(-) diff --git a/libavformat/http.c b/libavformat/http.c index 684058147a..1eb716b107 100644 --- a/libavformat/http.c +++ b/libavformat/http.c @@ -25,6 +25,7 @@ #include #endif /* CONFIG_ZLIB */ +#include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/opt.h" @@ -44,6 +45,14 @@ * path names). */ #define BUFFER_SIZE MAX_URL_SIZE #define MAX_REDIRECTS 8 +#define HTTP_SINGLE 1 +#define HTTP_MUTLI 2 +typedef enum { + LOWER_PROTO, + READ_HEADERS, + WRITE_REPLY_HEADERS, + FINISH +}HandshakeState; typedef struct HTTPContext { const AVClass *class; @@ -97,6 +106,11 @@ typedef struct HTTPContext { char *method; int reconnect; int listen; + char *resource; + int reply_code; + int is_multi_client; + HandshakeState handshake_step; + int is_connected_server; } HTTPContext; #define OFFSET(x) offsetof(HTTPContext, x) @@ -128,7 +142,9 @@ static const AVOption options[] = { { "end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D }, { "method", "Override the HTTP method or set the expected HTTP method from a client", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E }, { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D }, - { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E }, + { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E }, + { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, + { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E}, { NULL } }; @@ -299,51 +315,143 @@ int ff_http_averror(int status_code, int default_averror) return default_averror; } +static int http_write_reply(URLContext* h, int status_code) +{ + int ret, body = 0, reply_code, message_len; + const char *reply_text, *content_type; + HTTPContext *s = h->priv_data; + char message[BUFFER_SIZE]; + content_type = "text/plain"; + + if (status_code < 0) + body = 1; + switch (status_code) { + case AVERROR_HTTP_BAD_REQUEST: + case 400: + reply_code = 400; + reply_text = "Bad Request"; + break; + case AVERROR_HTTP_FORBIDDEN: + case 403: + reply_code = 403; + reply_text = "Forbidden"; + break; + case AVERROR_HTTP_NOT_FOUND: + case 404: + reply_code = 404; + reply_text = "Not Found"; + break; + case 200: + reply_code = 200; + reply_text = "OK"; + content_type = "application/octet-stream"; + break; + case AVERROR_HTTP_SERVER_ERROR: + case 500: + reply_code = 500; + reply_text = "Internal server error"; + break; + default: + return AVERROR(EINVAL); + } + if (body) { + s->chunked_post = 0; + message_len = snprintf(message, sizeof(message), + "HTTP/1.1 %03d %s\r\n" + "Content-Type: %s\r\n" + "Content-Length: %zu\r\n" + "\r\n" + "%03d %s\r\n", + reply_code, + reply_text, + content_type, + strlen(reply_text) + 6, // 3 digit status code + space + \r\n + reply_code, + reply_text); + } else { + s->chunked_post = 1; + message_len = snprintf(message, sizeof(message), + "HTTP/1.1 %03d %s\r\n" + "Content-Type: %s\r\n" + "Transfer-Encoding: chunked\r\n" + "\r\n", + reply_code, + reply_text, + content_type); + } + av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message); + if ((ret = ffurl_write(s->hd, message, message_len)) < 0) + return ret; + return 0; +} + static void handle_http_errors(URLContext *h, int error) { - static const char bad_request[] = "HTTP/1.1 400 Bad Request\r\nContent-Type: text/plain\r\n\r\n400 Bad Request\r\n"; - static const char internal_server_error[] = "HTTP/1.1 500 Internal server error\r\nContent-Type: text/plain\r\n\r\n500 Internal server error\r\n"; - HTTPContext *s = h->priv_data; - if (h->is_connected) { - switch(error) { - case AVERROR_HTTP_BAD_REQUEST: - ffurl_write(s->hd, bad_request, strlen(bad_request)); - break; - default: - av_log(h, AV_LOG_ERROR, "Unhandled HTTP error.\n"); - ffurl_write(s->hd, internal_server_error, strlen(internal_server_error)); + av_assert0(error < 0); + http_write_reply(h, error); +} + +static int http_handshake(URLContext *c) +{ + int ret, err, new_location; + HTTPContext *ch = c->priv_data; + URLContext *cl = ch->hd; + switch (ch->handshake_step) { + case LOWER_PROTO: + av_log(c, AV_LOG_TRACE, "Lower protocol\n"); + if ((ret = ffurl_handshake(cl) > 0)) + return 2 + ret; + if ((ret < 0)) + return ret; + ch->handshake_step = READ_HEADERS; + ch->is_connected_server = 1; + return 2; + case READ_HEADERS: + av_log(c, AV_LOG_TRACE, "Read headers\n"); + if ((err = http_read_header(c, &new_location)) < 0) { + handle_http_errors(c, err); + return err; } + ch->handshake_step = WRITE_REPLY_HEADERS; + return 1; + case WRITE_REPLY_HEADERS: + av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code); + if ((err = http_write_reply(c, ch->reply_code)) < 0) + return err; + ch->handshake_step = FINISH; + return 1; + case FINISH: + return 0; } + // this should never be reached. + return AVERROR(EINVAL); } static int http_listen(URLContext *h, const char *uri, int flags, AVDictionary **options) { HTTPContext *s = h->priv_data; int ret; - static const char header[] = "HTTP/1.1 200 OK\r\nContent-Type: application/octet-stream\r\nTransfer-Encoding: chunked\r\n\r\n"; char hostname[1024], proto[10]; char lower_url[100]; const char *lower_proto = "tcp"; - int port, new_location; - s->chunked_post = 1; + int port; av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); if (!strcmp(proto, "https")) lower_proto = "tls"; ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port, NULL); - av_dict_set(options, "listen", "1", 0); + if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0) + goto fail; if ((ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, &h->interrupt_callback, options)) < 0) goto fail; - if ((ret = http_read_header(h, &new_location)) < 0) - goto fail; - if ((ret = ffurl_write(s->hd, header, strlen(header))) < 0) - goto fail; - return 0; - + s->handshake_step = LOWER_PROTO; + if (s->listen == HTTP_SINGLE) { /* single client */ + s->reply_code = 200; + while ((ret = http_handshake(h)) > 0); + } fail: - handle_http_errors(h, ret); av_dict_free(&s->chained_options); return ret; } @@ -389,6 +497,26 @@ static int http_open(URLContext *h, const char *uri, int flags, return ret; } +static int http_accept(URLContext *s, URLContext **c) +{ + int ret; + HTTPContext *sc = s->priv_data; + HTTPContext *cc; + URLContext *sl = sc->hd; + URLContext *cl = NULL; + + av_assert0(sc->listen); + if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0) + goto fail; + cc = (*c)->priv_data; + if ((ret = ffurl_accept(sl, &cl)) < 0) + goto fail; + cc->hd = cl; + cc->is_multi_client = 1; +fail: + return ret; +} + static int http_getc(HTTPContext *s) { int len; @@ -583,7 +711,7 @@ static int process_line(URLContext *h, char *line, int line_count, p = line; if (line_count == 0) { - if (s->listen) { + if (s->is_connected_server) { // HTTP method method = p; while (!av_isspace(*p)) @@ -604,6 +732,8 @@ static int process_line(URLContext *h, char *line, int line_count, "(%s autodetected %s received)\n", auto_method, method); return ff_http_averror(400, AVERROR(EIO)); } + if (!(s->method = av_strdup(method))) + return AVERROR(ENOMEM); } // HTTP resource @@ -614,6 +744,8 @@ static int process_line(URLContext *h, char *line, int line_count, p++; *(p++) = '\0'; av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource); + if (!(s->resource = av_strdup(resource))) + return AVERROR(ENOMEM); // HTTP version while (av_isspace(*p)) @@ -1353,6 +1485,8 @@ HTTP_CLASS(http); URLProtocol ff_http_protocol = { .name = "http", .url_open2 = http_open, + .url_accept = http_accept, + .url_handshake = http_handshake, .url_read = http_read, .url_write = http_write, .url_seek = http_seek,