Minimal Poco websocket C++ client

README.md

Stazeni a kompilace POCO

wget http://pocoproject.org/releases/poco-1.7.3/poco-1.7.3.tar.gz
tar xzf poco-1.7.3.tar.gz
cd poco-1.7.3
./configure --minimal --static --no-samples --no-tests
time make -j4 -s
cd lib/Linux/x86_64/
for f in *.a; do "strip $f"; done
du -sh ../ 

Cesty

-Ipoco-1.7.3/Util/include/Util
-Ipoco-1.7.3/Net/include/Net
-Ipoco-1.7.3/XML/include/XML
-Ipoco-1.7.3/Foundation/include/Foundation

-Ipoco-1.7.3/CppUnit/include/CppUnit
-Ipoco-1.7.3/JSON/include/JSON

-Lpoco-1.7.3/lib/Linux/x86_64 -lPocoNet -lPocoUtil -lPocoFoundation

-lpthread -static

g++ ws_client.cpp -Ipoco-1.7.3/Util/include/Util -Ipoco-1.7.3/Net/include/Net -Ipoco-1.7.3/XML/include/XML -Ipoco-1.7.3/Foundation/include/Foundation -Lpoco-1.7.3/lib/Linux/x86_64 -lPocoNet -lPocoUtil -lPocoFoundation -lpthread -o ws_client

Kompilace

g++ ws_client.cpp -Lpoco-1.7.3/lib/Linux/x86_64 -lPocoNet -lPocoFoundation -lpthread -o ws_client

martin@martin:~/pocotest$ g++ ws_client.cpp -Lpoco-1.7.3/lib/Linux/x86_64 -lPocoNet -lPocoFoundation -lpthread -o ws_client
martin@martin:~/pocotest$ strip ws_client
martin@martin:~/pocotest$ ls -lh | grep ws_client
-rwxr-xr-x  1 martin martin 877K kvě 30 00:04 ws_client
-rw-r--r--  1 martin martin 1,2K kvě 30 00:03 ws_client.cpp
martin@martin:~/pocotest$ ldd ws_client
	linux-vdso.so.1 =>  (0x00007fff8cffe000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fe4e8c5b000)
	libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fe4e8957000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fe4e8650000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fe4e843a000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe4e8075000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fe4e8ea9000)
martin@martin:~/pocotest$ 
martin@martin:~/pocotest$ ./ws_client 
Sent bytes 21
Received bytes 21
Hello echo websocket!
martin@martin:~/pocotest$ file ws_client
ws_client: ELF 64-bit LSB  executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=8cf14391ff99dac98b66de18ae92c887122a7a13, stripped
martin@martin:~/pocotest$ 

ws_client.cpp

#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include "Poco/Net/HTTPMessage.h"
#include "Poco/Net/WebSocket.h"
#include "Poco/Net/HTTPClientSession.h"
#include <iostream>

using Poco::Net::HTTPClientSession;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPResponse;
using Poco::Net::HTTPMessage;
using Poco::Net::WebSocket;


int main(int args,char **argv)
{
    HTTPClientSession cs("echo.websocket.org",80);    
    HTTPRequest request(HTTPRequest::HTTP_GET, "/?encoding=text",HTTPMessage::HTTP_1_1);
    request.set("origin", "http://www.websocket.org");
    HTTPResponse response;

    try {

        WebSocket* m_psock = new WebSocket(cs, request, response);
        char const *testStr="Hello echo websocket!";
        char receiveBuff[256];

        int len=m_psock->sendFrame(testStr,strlen(testStr),WebSocket::FRAME_TEXT);
        std::cout << "Sent bytes " << len << std::endl;
        int flags=0;

        int rlen=m_psock->receiveFrame(receiveBuff,256,flags);
        std::cout << "Received bytes " << rlen << std::endl;
        std::cout << receiveBuff << std::endl;

        m_psock->close();

    } catch (std::exception &e) {
        std::cout << "Exception " << e.what();
    }

}

Thanks to you, I realized how to work with a WebSocket in POCO. Thank you very much. Very clear and simple example