TCP Socket send&recv 範例摘錄 (Server:C++ App, Client:UE4)
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| // TCP Client (UE4) | |
| // send FString | |
| FString message = "welcome to here"; | |
| TCHAR* seriallizedChar = message.GetCharArray().GetData(); | |
| int32 size = FCString::Strlen(seriallizedChar) + 1; | |
| int32 sentByte = 0; | |
| HostSock->Send((uint8*)TCHAR_TO_UTF8(seriallizedChar), size, sentByte); | |
| // recv FString | |
| TArray<uint8> ReceiveData; | |
| uint32 size = 1024u; | |
| HostSock->HasPendingData(size); | |
| ReceiveData.Init(0, FMath::Min(size, 65507u)); | |
| int32 readByte = 0; | |
| HostSock->Recv(ReceiveData.GetData(), ReceiveData.Num(), readByte); | |
| UE_LOG(LogTemp, Warning, TEXT("Data Bytes Read : %s Byte."), *FString::FromInt(readByte)); | |
| FString ReceivedUE4String = "Data : " + FString(ANSI_TO_TCHAR(reinterpret_cast<const char*>(ReceiveData.GetData()))); // byte to char | |
| UE_LOG(LogTemp, Warning, TEXT("%s"), *ReceivedUE4String); | |
| // send TArray<float> | |
| TArray<float> data; | |
| int32 ByteSent = 0; | |
| FArrayWriter writer; | |
| for (int i=0; i<data.Num(); i++) | |
| { | |
| writer << data[i]; | |
| } | |
| HostSock->Send(writer.GetData(), writer.Num(), ByteSent) | |
| // recv float | |
| TArray<uint8> ReceiveData; | |
| uint32 size = 1024u; | |
| HostSock->HasPendingData(size); | |
| ReceiveData.Init(0, FMath::Min(size, 65507u)); | |
| int32 readByte = 0; | |
| float decodeFloat[8]; // how many float data | |
| HostSock->Recv(ReceiveData.GetData(), ReceiveData.Num(), readByte); | |
| UE_LOG(LogTemp, Warning, TEXT("Data Bytes Read : %s Byte."), *FString::FromInt(readByte)); | |
| for (int i = 0; i< readByte / 4; i++) | |
| { | |
| TArray<uint8> binaryData; | |
| binaryData.Add(ReceiveData.GetData()[(0 + i * 4) + 0]); | |
| binaryData.Add(ReceiveData.GetData()[(0 + i * 4) + 1]); | |
| binaryData.Add(ReceiveData.GetData()[(0 + i * 4) + 2]); | |
| binaryData.Add(ReceiveData.GetData()[(0 + i * 4) + 3]); | |
| decodeFloat[i] = *reinterpret_cast<float*>(binaryData.GetData()); // byte to float | |
| ReceivedUE4String += FString::SanitizeFloat(decodeFloat[i]) + ", "; | |
| } | |
| UE_LOG(LogTemp, Warning, TEXT("%s"), *ReceivedUE4String); |
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| // TCP Server (C++ console application) | |
| // send string | |
| char* text = "PlayerName"; | |
| char sendBuff[50]; | |
| sprintf_s(sendBuff, "welcome %s to here", text); | |
| send(clientSock, sendBuff, strlen(sendBuff) + 1, 0); | |
| //recv string | |
| char recvBuff[50]; | |
| recv(clientSock, recvBuff, 50, 0); | |
| printf(" %s \n\n", recvBuff); | |
| // send float | |
| float fp = 1.1f; | |
| char* fp_char = (char*)&fp; | |
| send(clientSock, fp_char, sizeof fp, 0); | |
| // recv float | |
| char recvBuff[256]; | |
| int floatNum = 1; | |
| recv(clientSock, recvBuff, sizeof(float) * floatNum, 0); | |
| float decode_f = *reinterpret_cast<float*>(recvBuff); // byte to float | |
| printf(" %f \n\n", decode_f); | |
| // note: decode several flaot | |
| //char f1[4] = { recvBuff[0], recvBuff[1], recvBuff[2], recvBuff[3] }; | |
| //char f2[4] = { recvBuff[4], recvBuff[5], recvBuff[6], recvBuff[7] }; | |
| //printf(" %f \n\n", *reinterpret_cast<float*>(f1)); | |
| //printf(" %f \n\n", *reinterpret_cast<float*>(f2)); |