diff --git a/trunk/research/api-server/server.py b/trunk/research/api-server/server.py
index a6b61acc0..435bdc0d3 100755
--- a/trunk/research/api-server/server.py
+++ b/trunk/research/api-server/server.py
@@ -49,14 +49,53 @@ if len(sys.argv) <= 1:
     print "See also: https://github.com/winlinvip/simple-rtmp-server"
     sys.exit(1)
 
-import datetime, cherrypy
+import json, datetime, cherrypy
 
 def trace(msg):
     date = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
     print "[%s][trace] %s"%(date, msg)
 
+def enable_crossdomain():
+    cherrypy.response.headers["Access-Control-Allow-Origin"] = "*"
+    cherrypy.response.headers["Access-Control-Allow-Methods"] = "GET, POST, HEAD, PUT, DELETE"
+    # generate allow headers for crossdomain.
+    allow_headers = ["Cache-Control", "X-Proxy-Authorization", "X-Requested-With", "Content-Type"]
+    cherrypy.response.headers["Access-Control-Allow-Headers"] = ",".join(allow_headers)
+
+class Error:
+    # ok, success, completed.
+    success = 0
+    # error when parse json
+    system_parse_json = 100
+
+'''
+handle the clients requests:
+POST: create new client, handle the SRS on_connect callback.
+'''
 class RESTClients(object):
-    pass;
+    exposed = True
+    def GET(self):
+        enable_crossdomain();
+
+        clients = {};
+        return json.dumps(clients);
+
+    def POST(self):
+        enable_crossdomain();
+
+        req = cherrypy.request.body.read();
+        trace("post to clients, req=%s"%(req));
+        try:
+            json_req = json.loads(req)
+        except Exception, ex:
+            trace("parse the request to json failed, req=%s, ex=%s"%(req, ex))
+            return str(Error.system_parse_json);
+
+        trace("valid clients post request success.")
+        return str(Error.success);
+
+    def OPTIONS(self):
+        enable_crossdomain()
 
 class Root(object):
     def __init__(self):
diff --git a/trunk/src/core/srs_core_error.hpp b/trunk/src/core/srs_core_error.hpp
index 411816f39..a5d5348f0 100644
--- a/trunk/src/core/srs_core_error.hpp
+++ b/trunk/src/core/srs_core_error.hpp
@@ -144,5 +144,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #define ERROR_HTTP_PARSE_URI			800
 #define ERROR_HTTP_DATA_INVLIAD			801
+#define ERROR_HTTP_PARSE_HEADER			802
 
 #endif
\ No newline at end of file
diff --git a/trunk/src/core/srs_core_http.cpp b/trunk/src/core/srs_core_http.cpp
index 2963dad3d..7bb8ac006 100644
--- a/trunk/src/core/srs_core_http.cpp
+++ b/trunk/src/core/srs_core_http.cpp
@@ -23,13 +23,19 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_core_http.hpp>
 
+#ifdef SRS_HTTP
+
+#include <sstream>
+
 #include <stdlib.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 
 #include <srs_core_error.hpp>
 #include <srs_core_rtmp.hpp>
 #include <srs_core_log.hpp>
-
-#ifdef SRS_HTTP
+#include <srs_core_socket.hpp>
 
 #define SRS_DEFAULT_HTTP_PORT 80
 #define SRS_HTTP_RESPONSE_OK "0"
@@ -97,6 +103,11 @@ int SrsHttpUri::get_port()
     return port;
 }
 
+const char* SrsHttpUri::get_path()
+{
+    return path.c_str();
+}
+
 std::string SrsHttpUri::get_uri_field(std::string uri, http_parser_url* hp_u, http_parser_url_fields field)
 {
     if((hp_u->field_set & (1 << field)) == 0){
@@ -117,18 +128,270 @@ std::string SrsHttpUri::get_uri_field(std::string uri, http_parser_url* hp_u, ht
 
 SrsHttpClient::SrsHttpClient()
 {
+	connected = false;
+	stfd = NULL;
 }
 
 SrsHttpClient::~SrsHttpClient()
 {
+	disconnect();
 }
 
 int SrsHttpClient::post(SrsHttpUri* uri, std::string req, std::string& res)
 {
 	int ret = ERROR_SUCCESS;
+	
+	if ((ret = connect(uri)) != ERROR_SUCCESS) {
+		srs_error("http connect server failed. ret=%d", ret);
+		return ret;
+	}
+	
+    // send POST request to uri
+    // POST %s HTTP/1.1\r\nHost: %s\r\nContent-Length: %d\r\n\r\n%s
+    std::stringstream ss;
+    ss << "POST " << uri->get_path() << " "
+        << "HTTP/1.1\r\n"
+        << "Host: " << uri->get_host() << "\r\n"
+        << "Connection: Keep-Alive" << "\r\n"
+        << "Content-Length: " << std::dec << req.length() << "\r\n"
+        << "User-Agent: " << RTMP_SIG_SRS_NAME << RTMP_SIG_SRS_VERSION << "\r\n"
+        << "Content-Type: text/html" << "\r\n"
+        << "\r\n"
+        << req;
+    
+    SrsSocket skt(stfd);
+    
+    std::string data = ss.str();
+    ssize_t nwrite;
+    if ((ret = skt.write(data.c_str(), data.length(), &nwrite)) != ERROR_SUCCESS) {
+        // disconnect when error.
+        disconnect();
+        
+        srs_error("write http post failed. ret=%d", ret);
+        return ret;
+    }
+    
+    if ((ret = parse_response(uri, &skt, &res)) != ERROR_SUCCESS) {
+        srs_error("parse http post response failed. ret=%d", ret);
+        return ret;
+    }
+    srs_info("parse http post response success.");
+	
 	return ret;
 }
 
+void SrsHttpClient::disconnect()
+{
+	connected = false;
+	
+	if (stfd) {
+		int fd = st_netfd_fileno(stfd);
+		st_netfd_close(stfd);
+		stfd = NULL;
+		
+		// st does not close it sometimes, 
+		// close it manually.
+		::close(fd);
+	}
+}
+
+int SrsHttpClient::connect(SrsHttpUri* uri)
+{
+	int ret = ERROR_SUCCESS;
+	
+	if (connected) {
+		return ret;
+	}
+	
+	disconnect();
+	
+	std::string ip = srs_dns_resolve(uri->get_host());
+	if (ip.empty()) {
+		ret = ERROR_SYSTEM_IP_INVALID;
+		srs_error("dns resolve server error, ip empty. ret=%d", ret);
+		return ret;
+	}
+
+    int sock = socket(AF_INET, SOCK_STREAM, 0);
+    if(sock == -1){
+        ret = ERROR_SOCKET_CREATE;
+        srs_error("create socket error. ret=%d", ret);
+        return ret;
+    }
+    
+    stfd = st_netfd_open_socket(sock);
+    if(stfd == NULL){
+        ret = ERROR_ST_OPEN_SOCKET;
+        srs_error("st_netfd_open_socket failed. ret=%d", ret);
+        return ret;
+    }
+	
+    sockaddr_in addr;
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(uri->get_port());
+    addr.sin_addr.s_addr = inet_addr(ip.c_str());
+    
+    if (st_connect(stfd, (const struct sockaddr*)&addr, sizeof(sockaddr_in), ST_UTIME_NO_TIMEOUT) == -1){
+        ret = ERROR_ST_CONNECT;
+        srs_error("connect to server error. "
+        	"ip=%s, port=%d, ret=%d", ip.c_str(), uri->get_port(), ret);
+        return ret;
+    }
+    srs_info("connect to server success. "
+    	"http url=%s, server=%s, ip=%s, port=%d", 
+    	uri->get_url(), uri->get_host(), ip.c_str(), uri->get_port());
+    
+    connected = true;
+    
+	return ret;
+}
+
+int SrsHttpClient::parse_response(SrsHttpUri* uri, SrsSocket* skt, std::string* response)
+{
+    int ret = ERROR_SUCCESS;
+
+    int body_received = 0;
+    if ((ret = parse_response_header(skt, response, body_received)) != ERROR_SUCCESS) {
+        srs_error("parse response header failed. ret=%d", ret);
+        return ret;
+    }
+
+    if ((ret = parse_response_body(uri, skt, response, body_received)) != ERROR_SUCCESS) {
+        srs_error("parse response body failed. ret=%d", ret);
+        return ret;
+    }
+
+    srs_info("url %s download, body size=%"PRId64, uri->get_url(), http_header.content_length);
+    
+    return ret;
+}
+
+int SrsHttpClient::parse_response_header(SrsSocket* skt, std::string* response, int& body_received)
+{
+    int ret = ERROR_SUCCESS;
+
+    http_parser_settings settings;
+    
+    memset(&settings, 0, sizeof(settings));
+    settings.on_headers_complete = on_headers_complete;
+    
+    http_parser parser;
+    http_parser_init(&parser, HTTP_RESPONSE);
+    // callback object ptr.
+    parser.data = (void*)this;
+    
+    // reset response header.
+    memset(&http_header, 0, sizeof(http_header));
+    
+    // parser header.
+    char buf[SRS_HTTP_HEADER_BUFFER];
+    for (;;) {
+        ssize_t nread;
+        if ((ret = skt->read(buf, (size_t)sizeof(buf), &nread)) != ERROR_SUCCESS) {
+            srs_error("read body from server failed. ret=%d", ret);
+            return ret;
+        }
+        
+        ssize_t nparsed = http_parser_execute(&parser, &settings, buf, nread);
+        srs_info("read_size=%d, nparsed=%d", (int)nread, (int)nparsed);
+
+        // check header size.
+        if (http_header.nread != 0) {
+            body_received = nread - nparsed;
+            
+            srs_info("http header parsed, size=%d, content-length=%"PRId64", body-received=%d", 
+                http_header.nread, http_header.content_length, body_received);
+                
+            if(response != NULL && body_received > 0){
+                response->append(buf + nparsed, body_received);
+            }
+
+            return ret;
+        }
+        
+        if (nparsed != nread) {
+            ret = ERROR_HTTP_PARSE_HEADER;
+            srs_error("parse response error, parsed(%d)!=read(%d), ret=%d", (int)nparsed, (int)nread, ret);
+            return ret;
+        }
+    }
+    
+    return ret;
+}
+
+int SrsHttpClient::parse_response_body(SrsHttpUri* uri, SrsSocket* skt, std::string* response, int body_received)
+{
+    int ret = ERROR_SUCCESS;
+    
+    srs_assert(uri != NULL);
+    
+    uint64_t body_left = http_header.content_length - body_received;
+    
+    if (body_left <= 0) {
+        return ret;
+    }
+    
+    if (response != NULL) {
+        char buf[SRS_HTTP_BODY_BUFFER];
+        
+        return parse_response_body_data(
+        	uri, skt, response, (size_t)body_left, 
+        	(const void*)buf, (size_t)SRS_HTTP_BODY_BUFFER
+        );
+    } else {
+        // if ignore response, use shared fast memory.
+        static char buf[SRS_HTTP_BODY_BUFFER];
+        
+        return parse_response_body_data(
+			uri, skt, response, (size_t)body_left, 
+			(const void*)buf, (size_t)SRS_HTTP_BODY_BUFFER
+		);
+    }
+    
+    return ret;
+}
+
+int SrsHttpClient::parse_response_body_data(SrsHttpUri* uri, SrsSocket* skt, std::string* response, size_t body_left, const void* buf, size_t size)
+{
+    int ret = ERROR_SUCCESS;
+    
+    srs_assert(uri != NULL);
+    
+    while (body_left > 0) {
+        ssize_t nread;
+		int size_to_read = srs_min(size, body_left);
+        if ((ret = skt->read(buf, size_to_read, &nread)) != ERROR_SUCCESS) {
+            srs_error("read header from server failed. ret=%d", ret);
+            return ret;
+        }
+        
+        if (response != NULL && nread > 0) {
+            response->append((char*)buf, nread);
+        }
+        
+        body_left -= nread;
+        srs_info("read url(%s) content partial %"PRId64"/%"PRId64"", 
+            uri->get_url(), http_header.content_length - body_left, http_header.content_length);
+    }
+    
+    return ret;
+}
+
+int SrsHttpClient::on_headers_complete(http_parser* parser)
+{
+    SrsHttpClient* obj = (SrsHttpClient*)parser->data;
+    obj->comple_header(parser);
+    
+    // see http_parser.c:1570, return 1 to skip body.
+    return 1;
+}
+
+void SrsHttpClient::comple_header(http_parser* parser)
+{
+    // save the parser status when header parse completed.
+    memcpy(&http_header, parser, sizeof(http_header));
+}
+
 SrsHttpHooks::SrsHttpHooks()
 {
 }
@@ -148,33 +411,33 @@ int SrsHttpHooks::on_connect(std::string url, std::string ip, SrsRequest* req)
 		return ret;
 	}
 	
-	std::string res;
-	std::string data;
 	/**
 	{
 		"ip": "192.168.1.10", "vhost": "video.test.com", "app": "live",
 		"pageUrl": "http://www.test.com/live.html"
 	}
     */
-	data += "{";
-	// ip
-	data += "\"ip\":";
-	data += "\"" + ip + "\"";
-	data += ",";
-	// vhost
-	data += "\"vhost\":";
-	data += "\"" + req->vhost + "\"";
-	data += ",";
-	data += ",";
-	// app
-	data += "\"vhost\":";
-	data += "\"" + req->app + "\"";
-	data += ",";
-	// pageUrl
-	data += "\"vhost\":";
-	data += "\"" + req->pageUrl + "\"";
-	//data += ",";
-	data += "}";
+	std::stringstream ss;
+	ss << "{"
+		// ip
+		<< '"' << "ip" << '"' << ':'
+		<< '"' << ip << '"'
+		<< ','
+		// vhost
+		<< '"' << "vhost" << '"' << ':'
+		<< '"' << req->vhost << '"'
+		<< ','
+		// app
+		<< '"' << "app" << '"' << ':'
+		<< '"' << req->app << '"'
+		<< ','
+		// pageUrl
+		<< '"' << "pageUrl" << '"' << ':'
+		<< '"' << req->pageUrl << '"'
+		//<< ','
+		<< "}";
+	std::string data = ss.str();
+	std::string res;
 	
 	SrsHttpClient http;
 	if ((ret = http.post(&uri, data, res)) != ERROR_SUCCESS) {
diff --git a/trunk/src/core/srs_core_http.hpp b/trunk/src/core/srs_core_http.hpp
index e9cf2e66e..426760c1f 100644
--- a/trunk/src/core/srs_core_http.hpp
+++ b/trunk/src/core/srs_core_http.hpp
@@ -29,14 +29,19 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include <srs_core.hpp>
 
+#ifdef SRS_HTTP
+
 class SrsRequest;
+class SrsSocket;
 
 #include <string>
 
-#ifdef SRS_HTTP
-
+#include <st.h>
 #include <http_parser.h>
 
+#define SRS_HTTP_HEADER_BUFFER		1024
+#define SRS_HTTP_BODY_BUFFER		32 * 1024
+
 /**
 * used to resolve the http uri.
 */
@@ -61,6 +66,7 @@ public:
     virtual const char* get_schema();
     virtual const char* get_host();
     virtual int get_port();
+    virtual const char* get_path();
 private:
     /**
     * get the parsed url field.
@@ -74,6 +80,11 @@ private:
 */
 class SrsHttpClient
 {
+private:
+	bool connected;
+	st_netfd_t stfd;
+private:
+    http_parser http_header;
 public:
 	SrsHttpClient();
 	virtual ~SrsHttpClient();
@@ -84,6 +95,17 @@ public:
 	* @param res the response data from server.
 	*/
 	virtual int post(SrsHttpUri* uri, std::string req, std::string& res);
+private:
+	virtual void disconnect();
+	virtual int connect(SrsHttpUri* uri);
+private:
+    virtual int parse_response(SrsHttpUri* uri, SrsSocket* skt, std::string* response);
+    virtual int parse_response_header(SrsSocket* skt, std::string* response, int& body_received);
+    virtual int parse_response_body(SrsHttpUri* uri, SrsSocket* skt, std::string* response, int body_received);
+    virtual int parse_response_body_data(SrsHttpUri* uri, SrsSocket* skt, std::string* response, size_t body_left, const void* buf, size_t size);
+private:
+    static int on_headers_complete(http_parser* parser);
+    virtual void comple_header(http_parser* parser);
 };
 
 /**