105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
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// EchoServer.cpp
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// Implements an Echo server using the LibEvent-based cNetwork API, as a test of that API
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#include "Globals.h"
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#include <iostream>
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#include <string>
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#include "OSSupport/Network.h"
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class cEchoServerCallbacks:
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public cNetwork::cListenCallbacks
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{
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virtual void OnAccepted(cTCPLink & a_Link) override
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{
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LOGD("New client accepted (%s:%d), sending welcome message.", a_Link.GetRemoteIP().c_str(), a_Link.GetRemotePort());
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// Send a welcome message to each connecting client:
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a_Link.Send("Welcome to the simple echo server.\r\n");
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LOGD("Welcome message queued.");
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}
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virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
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{
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LOGWARNING("An error occured while listening for connections: %d (%s).", a_ErrorCode, a_ErrorMsg.c_str());
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}
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};
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/** cTCPLink callbacks that echo everything they receive back to the remote peer. */
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class cEchoLinkCallbacks:
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public cTCPLink::cCallbacks
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{
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virtual void OnReceivedData(cTCPLink & a_Link, const char * a_Data, size_t a_Size) override
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{
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// Echo the incoming data back to outgoing data:
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LOGD("%p (%s:%d): Data received (%u bytes), echoing back.", &a_Link, a_Link.GetRemoteIP().c_str(), a_Link.GetRemotePort(), static_cast<unsigned>(a_Size));
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a_Link.Send(a_Data, a_Size);
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LOGD("Echo queued");
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// Search for a Ctrl+Z, if found, drop the connection:
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for (size_t i = 0; i < a_Size; i++)
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{
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if (a_Data[i] == '\x1a')
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{
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a_Link.Close();
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return;
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}
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}
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}
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virtual void OnRemoteClosed(cTCPLink & a_Link) override
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{
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LOGD("%p (%s:%d): Remote has closed the connection.", &a_Link, a_Link.GetRemoteIP().c_str(), a_Link.GetRemotePort());
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}
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virtual void OnError(cTCPLink & a_Link, int a_ErrorCode) override
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{
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LOGD("%p (%s:%d): Error %d in the cEchoLinkCallbacks.", &a_Link, a_Link.GetRemoteIP().c_str(), a_Link.GetRemotePort(), a_ErrorCode);
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}
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};
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int main()
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{
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LOGD("EchoServer: starting up");
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cServerHandlePtr Server = cNetwork::Listen(9876, std::make_shared<cEchoServerCallbacks>(), std::make_shared<cEchoLinkCallbacks>());
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if (!Server->IsListening())
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{
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LOGWARNING("Cannot listen on port 9876");
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abort();
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}
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ASSERT(Server->IsListening());
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// Wait for the user to terminate the server:
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printf("Press enter to close the server.\n");
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AString line;
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std::getline(std::cin, line);
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// Close the server and all its active connections:
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LOG("Server terminating.");
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Server->Close();
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ASSERT(!Server->IsListening());
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LOGD("Server has been closed.");
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printf("Press enter to exit test.\n");
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std::getline(std::cin, line);
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LOG("Network test finished.");
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return 0;
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}
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