Forward: add backend config and demo server for dynamic create forwar…

…der to other server.(ossrs#1342)

trunk/conf/forward.master.conf

@@ -11,5 +11,6 @@ vhost __defaultVhost__ {
     forward {
         enabled on;
         destination 127.0.0.1:19350;
+        backend http://127.0.0.1:8085/api/v1/forward;
     }
 }

trunk/research/api-server/server.py

@@ -805,6 +805,173 @@ def POST(self):
     def OPTIONS(self, *args, **kwargs):
         enable_crossdomain()
 
+'''
+handle the forward requests: dynamic forward url.
+'''
+class RESTForward(object):
+    exposed = True
+
+    def __init__(self):
+        self.__forwards = []
+
+        self.__forwards.append({
+            "vhost":"ossrs.net",
+            "app":"live",
+            "stream":"livestream",
+            "url":"push.ossrs.com",
+        })
+
+        self.__forwards.append({
+            "app":"live",
+            "stream":"livestream",
+            "url":"push.ossrs.com",
+        })
+
+        self.__forwards.append({
+            "app":"live",
+            "stream":"livestream",
+            "url":"rtmp://push.ossrs.com/test/teststream?auth_token=123456",
+        })
+
+    def GET(self):
+        enable_crossdomain()
+
+        forwards = {}
+        return json.dumps(forwards)
+
+    '''
+    for SRS hook: on_forward
+    on_forward:
+        when srs reap a dvr file, call the hook,
+        the request in the POST data string is a object encode by json:
+              {
+                  "action": "on_forward",
+                  "server_id": "server_test",
+                  "client_id": 1985,
+                  "ip": "192.168.1.10",
+                  "vhost": "video.test.com",
+                  "app": "live",
+                  "tcUrl": "rtmp://video.test.com/live?key=d2fa801d08e3f90ed1e1670e6e52651a",
+                  "stream": "livestream",
+                  "param":"?token=xxx&salt=yyy"
+              }
+    if valid, the hook must return HTTP code 200(Stauts OK) and response
+    an int value specifies the error code(0 corresponding to success):
+          0
+    '''
+    def POST(self):
+        enable_crossdomain()
+
+        # return the error code in str
+        code = Error.success
+
+        req = cherrypy.request.body.read()
+        trace("post to forwards, req=%s"%(req))
+        try:
+            json_req = json.loads(req)
+        except Exception, ex:
+            code = Error.system_parse_json
+            trace("parse the request to json failed, req=%s, ex=%s, code=%s"%(req, ex, code))
+            return json.dumps({"code": int(code), "data": None})
+
+        action = json_req["action"]
+        if action == "on_forward":
+            return self.__on_forward(json_req)
+        else:
+            trace("invalid request action: %s"%(json_req["action"]))
+            code = Error.request_invalid_action
+
+        return json.dumps({"code": int(code), "data": None})
+
+    def OPTIONS(self, *args, **kwargs):
+        enable_crossdomain()
+
+    def __on_forward(self, req):
+        code = Error.success
+
+        trace("srs %s: client id=%s, ip=%s, vhost=%s, app=%s, tcUrl=%s, stream=%s, param=%s"%(
+            req["action"], req["client_id"], req["ip"], req["vhost"], req["app"], req["tcUrl"], req["stream"], req["param"]
+        ))
+
+        # dynamic create forward config
+        forwards = []
+        destinations = []
+
+        # handle param: ?forward=xxxxx&auth_token=xxxxx
+        # 1.delete ?
+        req_param = req["param"].replace('?', '', 1)
+
+        # 2.delete 'forward=xxxxx'
+        new_req_param = ""
+        params = req_param.split("&")
+        for param in params:
+            result = param.split("=")
+            if result[0].find("forward") != -1:
+                destinations.append({
+                    "url": result[1],
+                })
+            elif len(new_req_param) > 0:
+                new_req_param = new_req_param + "&" + param
+            else:
+                new_req_param = param
+
+        # secne: dynamic config
+        for forward in self.__forwards:
+            # vhost exist
+            if hasattr(forward, "vhost"):
+                if len(forward["vhost"]) > 0 and req["vhost"] != forward["vhost"]:
+                    continue
+            # app exist
+            if hasattr(forward, "app"):
+                if len(forward["app"]) > 0 and req["app"] != forward["app"]:
+                    continue
+            # app exist
+            if hasattr(forward, "stream"):
+                if len(forward["stream"]) > 0 and req["stream"] != forward["stream"]:
+                    continue
+            # no url
+            if forward["url"] is None:
+                continue
+
+            # url maybe spell full rtmp address
+            url = forward["url"]
+            if url.find("rtmp://") == -1:
+                # format: xxx:xxx
+                # maybe you should use destination config
+                url = "rtmp://%s/%s"%(url, req['app'])
+                if len(req['vhost']) > 0 and req['vhost'] != "__defaultVhost__" and url.find(req['vhost']) == -1:
+                    url = url + "?vhost=" + req['vhost']
+                url = url + "/" + req['stream']
+                if len(new_req_param) > 0:
+                    url = url + "?" + new_req_param
+
+            # append
+            forwards.append({
+                "url": url,
+            })
+
+        # secne: parse client params, like:
+        # format1: rtmp://srs-server/live/stream?forward=aliyuncdn.com:1936&token=xxxxxx
+        # format2: rtmp://srs-server/live/stream?forward=rtmp://cdn.com/myapp/mystream?XXXXXX
+        for destination in destinations:
+            url = destination["url"]
+            if url.find("rtmp://") == -1:
+                # format: xxx:xxx
+                # maybe you should use destination config
+                url = "rtmp://%s/%s"%(url, req['app'])
+                if len(req['vhost']) > 0 and req['vhost'] != "__defaultVhost__" and url.find(req['vhost']) == -1:
+                    url = url + "?vhost=" + req['vhost']
+                url = url + "/" + req['stream']
+                if len(new_req_param) > 0:
+                    url = url + "?" + new_req_param
+
+            # append
+            forwards.append({
+                "url": url,
+            })
+
+        return json.dumps({"code": int(code), "data": {"forwards": forwards}})
+
 # HTTP RESTful path.
 class Root(object):
     exposed = True
@@ -846,6 +1013,7 @@ def __init__(self):
         self.chats = RESTChats()
         self.servers = RESTServers()
         self.snapshots = RESTSnapshots()
+        self.forward = RESTForward()
     def GET(self):
         enable_crossdomain();
         return json.dumps({"code":Error.success, "urls":{

trunk/src/app/srs_app_config.cpp

@@ -2795,7 +2795,7 @@ srs_error_t SrsConfig::check_normal_config()
             } else if (n == "forward") {
                 for (int j = 0; j < (int)conf->directives.size(); j++) {
                     string m = conf->at(j)->name;
-                    if (m != "enabled" && m != "destination") {
+                    if (m != "enabled" && m != "destination" && m != "backend") {
                         return srs_error_new(ERROR_SYSTEM_CONFIG_INVALID, "illegal vhost.forward.%s of %s", m.c_str(), vhost->arg0().c_str());
                     }
                 }
@@ -4576,6 +4576,21 @@ SrsConfDirective* SrsConfig::get_forwards(string vhost)
     return conf->get("destination");
 }
 
+SrsConfDirective* SrsConfig::get_forward_backend(string vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+    if (!conf) {
+        return NULL;
+    }
+
+    conf = conf->get("forward");
+    if (!conf) {
+        return NULL;
+    }
+
+    return conf->get("backend");
+}
+
 SrsConfDirective* SrsConfig::get_vhost_http_hooks(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);

trunk/src/app/srs_app_config.hpp

@@ -604,6 +604,8 @@ class SrsConfig
     virtual bool get_forward_enabled(SrsConfDirective* vhost);
     // Get the forward directive of vhost.
     virtual SrsConfDirective* get_forwards(std::string vhost);
+    // Get the forward directive of backend.
+    virtual SrsConfDirective* get_forward_backend(std::string vhost);
 
 public:
     // Whether the srt sevice enabled

trunk/src/app/srs_app_forward.cpp

@@ -52,6 +52,8 @@ SrsForwarder::~SrsForwarder()
 
     srs_freep(sh_video);
     srs_freep(sh_audio);
+
+    srs_freep(req);
 }
 
 srs_error_t SrsForwarder::initialize(SrsRequest* r, string ep)
@@ -60,7 +62,7 @@ srs_error_t SrsForwarder::initialize(SrsRequest* r, string ep)
 
     // it's ok to use the request object,
     // SrsLiveSource already copy it and never delete it.
-    req = r;
+    req = r->copy();
 
     // the ep(endpoint) to forward to
     ep_forward = ep;

trunk/src/app/srs_app_http_hooks.cpp

@@ -482,6 +482,100 @@ srs_error_t SrsHttpHooks::discover_co_workers(string url, string& host, int& por
     return err;
 }
 
+// Request:
+//      POST /api/v1/forward
+//      {
+//          "action": "on_forward",
+//          "server_id": "vid-k21d7y2",
+//          "client_id": "9o7g1330",
+//          "ip": "127.0.0.1",
+//          "vhost": "__defaultVhost__",
+//          "app": "live",
+//          "tcUrl": "rtmp://127.0.0.1:1935/live",
+//          "stream": "livestream",
+//          "param": "?forward=rtmp://ossrs.net/live/livestream"
+//      }
+// Response:
+//      {
+//          "code": 0,
+//          "data": {
+//              "forwards":[{
+//                  "url": "rtmp://ossrs.net:1935/live/livestream?auth_token=xxx"
+//               },{
+//                  "url": "rtmp://aliyuncdn.com:1935/live/livestream?auth_token=xxx"
+//               }]
+//          }
+//      }
+srs_error_t SrsHttpHooks::on_forward_backend(string url, SrsRequest* req, std::vector<std::string>& rtmp_urls)
+{
+    srs_error_t err = srs_success;
+
+    SrsContextId cid = _srs_context->get_id();
+
+    SrsStatistic* stat = SrsStatistic::instance();
+
+    SrsJsonObject* obj = SrsJsonAny::object();
+    SrsAutoFree(SrsJsonObject, obj);
+
+    obj->set("action", SrsJsonAny::str("on_forward"));
+    obj->set("server_id", SrsJsonAny::str(stat->server_id().c_str()));
+    obj->set("client_id", SrsJsonAny::str(cid.c_str()));
+    obj->set("ip", SrsJsonAny::str(req->ip.c_str()));
+    obj->set("vhost", SrsJsonAny::str(req->vhost.c_str()));
+    obj->set("app", SrsJsonAny::str(req->app.c_str()));
+    obj->set("tcUrl", SrsJsonAny::str(req->tcUrl.c_str()));
+    obj->set("stream", SrsJsonAny::str(req->stream.c_str()));
+    obj->set("param", SrsJsonAny::str(req->param.c_str()));
+
+    std::string data = obj->dumps();
+    std::string res;
+    int status_code;
+
+    SrsHttpClient http;
+    if ((err = do_post(&http, url, data, status_code, res)) != srs_success) {
+        return srs_error_wrap(err, "http: on_forward_backend failed, client_id=%s, url=%s, request=%s, response=%s, code=%d",
+            cid.c_str(), url.c_str(), data.c_str(), res.c_str(), status_code);
+    }
+
+    // parse string res to json.
+    SrsJsonAny* info = SrsJsonAny::loads(res);
+    if (!info) {
+        return srs_error_new(ERROR_SYSTEM_FORWARD_LOOP, "load json from %s", res.c_str());
+    }
+    SrsAutoFree(SrsJsonAny, info);
+
+    // response error code in string.
+    if (!info->is_object()) {
+        return srs_error_new(ERROR_SYSTEM_FORWARD_LOOP, "response %s", res.c_str());
+    }
+
+    SrsJsonAny* prop = NULL;
+    // response standard object, format in json: {}
+    SrsJsonObject* res_info = info->to_object();
+    if ((prop = res_info->ensure_property_object("data")) == NULL) {
+        return srs_error_new(ERROR_SYSTEM_FORWARD_LOOP, "parse data %s", res.c_str());
+    }
+
+    SrsJsonObject* p = prop->to_object();
+    if ((prop = p->ensure_property_array("forwards")) == NULL) {
+        return srs_error_new(ERROR_SYSTEM_FORWARD_LOOP, "parse forwards %s", res.c_str());
+    }
+
+    SrsJsonArray* forwards = prop->to_array();
+    for (int i = 0; i < forwards->count(); i++) {
+        prop = forwards->at(i);
+        SrsJsonObject* forward = prop->to_object();
+        if ((prop = forward->ensure_property_string("url")) != NULL) {
+            rtmp_urls.push_back(prop->to_str());
+        }
+    }
+
+    srs_trace("http: on_forward_backend ok, client_id=%s, url=%s, request=%s, response=%s",
+        cid.c_str(), url.c_str(), data.c_str(), res.c_str());
+
+    return err;
+}
+
 srs_error_t SrsHttpHooks::do_post(SrsHttpClient* hc, std::string url, std::string req, int& code, string& res)
 {
     srs_error_t err = srs_success;

trunk/src/app/srs_app_http_hooks.hpp

@@ -10,6 +10,7 @@
 #include <srs_core.hpp>
 
 #include <string>
+#include <vector>
 
 class SrsHttpUri;
 class SrsStSocket;
@@ -79,6 +80,10 @@ class SrsHttpHooks
     static srs_error_t on_hls_notify(SrsContextId cid, std::string url, SrsRequest* req, std::string ts_url, int nb_notify);
     // Discover co-workers for origin cluster.
     static srs_error_t discover_co_workers(std::string url, std::string& host, int& port);
+    // The on_forward_backend hook, when publish stream start to forward
+    // @param url the api server url, to valid the client.
+    //         ignore if empty.
+    static srs_error_t on_forward_backend(std::string url, SrsRequest* req, std::vector<std::string>& rtmp_urls);
 private:
     static srs_error_t do_post(SrsHttpClient* hc, std::string url, std::string req, int& code, std::string& res);
 };