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winlin edited this page Jan 6, 2022 · 31 revisions

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SRS Embeded HTTP Server

SRS内嵌了一个web服务器,支持api和简单的文件分发。

部署和使用SRS的内嵌http服务器,参考:Usage: HTTP

SRS的内置HTTP服务器已经参考GO的HTTP模块重写,满足商用要求,可以当作web服务器使用。参考:#277

备注:SRS只支持源站HTTP分发,边缘还是需要用Web服务器比如NGINX、SQUID或ATS等。

Use Scenario

它的定位很简单:智能手机上的摄像头。

Nginx/Apache/lighthttpd等众多HTTP server大佬就是专业的单反,老长老长镜头了。 难道有了单反智能手机上就不能有摄像头?不会吧!而且必须有。所以不是要和nginx拼个你死我活, 定位不一样,就像fms内嵌apache一样(不过fms嵌得很烂),真的有必要而且方便。

为何srs不内嵌一个nginx呢?智能手机上能内嵌一个单反长镜头么?我去,那是怪物吧。 nginx14万行代码,巨大无比,srs才2万行,如何能内嵌呢?最核心的原因是:srs需要提供http的api, 方便外部管理和调用;这点往往都毫无异议,但是提到srs要内嵌web服务器,就都炸开锅啦。 OK,其实就是http的api稍微扩展点,支持读文件后发送给客户端。

srs会一如既往的保持最简单,http的代码不会有多少行,功能不会有几个,就支持简单的文件分发就足够了。可以:

  • 只需要部署一个服务器就可以分发RTMP和HLS。
  • SRS对于HLS/HDS/DASH的支持会更完善。
  • SRS可以支持点播,动态转封装等。
  • SRS依然可以用nginx作为反向代理,或者禁用这个选项,使用nginx分发。

实际上,RTMP协议本身比HTTP复杂很多,所以st来做http分发,没有任何不可以的地方,更何况只是做部分。所以,淡定~

Config

需要配置全局的HTTP端口和根目录的路径。

# embeded http server in srs.
# the http streaming config, for HLS/HDS/DASH/HTTPProgressive
# global config for http streaming, user must config the http section for each vhost.
# the embed http server used to substitute nginx in ./objs/nginx,
# for example, srs runing in arm, can provides RTMP and HTTP service, only with srs installed.
# user can access the http server pages, generally:
#       curl http://192.168.1.170:80/srs.html
# which will show srs version and welcome to srs.
# @remeark, the http embeded stream need to config the vhost, for instance, the __defaultVhost__
# need to open the feature http of vhost.
http_server {
    # whether http streaming service is enabled.
    # default: off
    enabled         on;
    # the http streaming port
    # @remark, if use lower port, for instance 80, user must start srs by root.
    # default: 8080
    listen          8080;
    # the default dir for http root.
    # default: ./objs/nginx/html
    dir             ./objs/nginx/html;
}

同时,vhost上可以指定http配置(虚拟目录和vhost):

vhost your_vhost {
    # http static vhost specified config
    http_static {
        # whether enabled the http static service for vhost.
        # default: off
        enabled     on;
        # the url to mount to, 
        # typical mount to [vhost]/
        # the variables:
        #       [vhost] current vhost for http server.
        # @remark the [vhost] is optional, used to mount at specified vhost.
        # @remark the http of __defaultVhost__ will override the http_stream section.
        # for example:
        #       mount to [vhost]/
        #           access by http://ossrs.net:8080/xxx.html
        #       mount to [vhost]/hls
        #           access by http://ossrs.net:8080/hls/xxx.html
        #       mount to /
        #           access by http://ossrs.net:8080/xxx.html
        #           or by http://192.168.1.173:8080/xxx.html
        #       mount to /hls
        #           access by http://ossrs.net:8080/hls/xxx.html
        #           or by http://192.168.1.173:8080/hls/xxx.html
        # default: [vhost]/
        mount       [vhost]/hls;
        # main dir of vhost,
        # to delivery HTTP stream of this vhost.
        # default: ./objs/nginx/html
        dir         ./objs/nginx/html/hls;
    }
}

注意:SRS1中的http_stream在SRS2改名为http_server,全局的server配置,即静态HTTP服务器,可用来分发dvr的HLS/FLV/HDS/MPEG-DASH等。

注意:SRS1中vhost的http在SRS2改名为http_static,和全局的http_server类似用来分发静态的文件。而SRS2新增的功能http_remux,用来动态转封装,将RTMP流转封装为 HTTP Live FLV/Mp3/Aac/Hls/Hds/MPEG-DASH流。

MIME

支持少量的MIME,见下表。

文件扩展名 Content-Type
.ts Content-Type: video/MP2T;charset=utf-8
.m3u8 Content-Type: application/x-mpegURL;charset=utf-8
.json Content-Type: application/json;charset=utf-8
.css Content-Type: text/css;charset=utf-8
.swf Content-Type: application/x-shockwave-flash;charset=utf-8
.js Content-Type: text/javascript;charset=utf-8
.xml Content-Type: text/xml;charset=utf-8
其他 Content-Type: text/html;charset=utf-8

Method

支持的Method包括:

  • GET: 下载文件。

Winlin 2015.1

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