[英]How to send xml in socket connection
我在 android 中編寫了一個套接字連接,並希望通過它發送 xml。 以下是我的套接字編程
@Override
protected Void doInBackground(Void... params) {
String modifiedSentence;
try {
String message ;
message ="<?xml version=\"1.0\"?><body><sendrecv> <eventList><eventName>event</eventName> <eventName>event</eventName> <eventName>event</eventName></eventList> </sendrecv></body>";
Log.d("String to send",message.toString());
Socket clientSocket = new Socket("192.168.0.200", SERVERPORT);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
Log.d(TAG,"TCP Connected.");
outToServer.writeBytes(message);
modifiedSentence = inFromServer.readLine();
Log.d(TAG,modifiedSentence);
Log.d(TAG,"sucess");
/* clientSocket.close();*/
} catch (Exception e) {
Log.d("TCP Error: ",e.toString());
}
return null;
}
我認為這個數據沒有被發送到服務器,因為服務器沒有響應這個請求..還有其他方法可以發送 xml 嗎?
androidManifest 權限中的權限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
C++平台QT客戶端中的工作代碼
int received;
unsigned char header [4];
int len;
int sent;
unsigned char recvbuf[2048];
unsigned int payload_len;
sprintf (sendbuf, "%s", "<?xml version=\"1.0\"?>"\
"<body>"\
"<sendrecv>"\
"<eventList>"\
"<eventName>event1</eventName>"\
"<eventName>event2</eventName>"\
"<eventName>event3</eventName>"\
"</eventList>"\
"</sendrecv>"\
"</body>");
}
len = strlen ((const char*)sendbuf);
header[0] = (unsigned char) (len >> 24);
header[1] = (unsigned char) (len >> 16);
header[2] = (unsigned char) (len >> 8);
header[3] = (unsigned char) len;
weht_writen(s.clientfd, header,4);
weht_writen(s.clientfd, (unsigned char*)sendbuf,len);
memset (header, 0x0, 4);
received= weht_readn(s.clientfd,header,4);
if(received<0)
{
qDebug()<<"Failed to read registration message header";
return;
}
payload_len = header[0];
payload_len <<= 8;
payload_len |= header[1];
payload_len <<= 8;
payload_len |= header[2];
payload_len <<= 8;
payload_len |= header[3];
received= weht_readn(s.clientfd,recvbuf,payload_len);
您最終發布的工作客戶端代碼在數據之前以網絡字節順序發送一個 32 位長度的字。 你不是發送那個。 您需要在發送數據之前使用DataOutputStream.writeInt()
發送它。 在您開始編寫客戶端代碼之前,您應該被告知這一點,或告知您自己。
似乎您需要刷新 Stream。 您需要在調用 outToServer.writeBytes(message) 之后添加 outToServer.flush();
Log.d(TAG,"TCP Connected.");
outToServer.writeBytes(message);
outToServer.flush(); // <---- Add this line
modifiedSentence = inFromServer.readLine();
Log.d(TAG,modifiedSentence);
Log.d(TAG,"sucess");
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