将字符串和文件从Android客户端发送到C#服务器
本文关键字:服务器 客户端 Android 字符串 文件 | 更新日期: 2023-09-27 18:21:50
我正试图将带有一堆字符串的文件从Android客户端发送到C#服务器。字符串还将包含与发送的文件有关的详细信息,例如:文件大小、文件名等。我遇到的问题是没有接收到所有文件字节,因此即使我可以正确检索所有字符串,也无法在目的地重建原始文件。
我的C#服务器代码
while (true)
{
Socket socket = listener.AcceptSocket();
setStatus(socket.RemoteEndPoint + " Connected");
try
{
// Open the stream
NetworkStream stream = new NetworkStream(socket);
System.IO.StreamReader sr = new StreamReader(stream);
//Get string data
//********************************************
Teststr = sr.ReadLine();
setStatus(Teststr);
FileSize = sr.ReadLine();
long fileSizeLong = Convert.ToInt64(FileSize);
int length = (int)fileSizeLong;
setStatus("File size: " + length + " bytes");
//********************************************
//read bytes to buffer
byte[] buffer = new byte[length];
int toRead = (int)length;
int read = 0;
while (toRead > 0)
{
int noChars = stream.Read(buffer, read, toRead);
read += noChars;
toRead -= noChars;
}
setStatus("File Recieved. Total bytes: " + Convert.ToString(buffer.Length));
setStatus("Saving File");
String recievedPath = "C:''Test''";
BinaryWriter bWrite = new BinaryWriter(File.Open(recievedPath + "Test.png", FileMode.Create));
bWrite.Write(buffer);
setStatus("File Saved to: " + recievedPath);
bWrite.Flush();
bWrite.Close();
stream.Flush();
stream.Close();
}
catch (Exception e)
{
setStatus(e.Message);
}
setStatus("Disconnected");
socket.Close();
}
我的Android客户端代码
File file = new File(configstr[2]); //create file instance
try {
client = new Socket(configstr[0], Integer.valueOf(configstr[1]));
//Read file
fileInputStream = new FileInputStream(file);
outputStream = client.getOutputStream();
//Output database details to stream
//*****************************************
//Holds the string before conversion to bytes
String text = "";
text = "Test'n";
outputStream.write(text.getBytes());
text = String.valueOf(file.length()) + "'n";
outputStream.write(text.getBytes());
//*****************************************
outputStream.flush();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] b = new byte[1024];
int bytesRead = 0;
while ((bytesRead = fileInputStream.read(b)) != -1) {
bos.write(b, 0, bytesRead);
}
byte[] bytes = bos.toByteArray();
outputStream.write(bytes);
outputStream.flush();
return true;
} catch (UnknownHostException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
注意:如果我只发送一个字符串,则代码运行良好,例如:如果我仅发送文件大小
当我试图通过流发送许多字符串以及文件中的二进制数据时,任何更好的方法都可以实现这一点。
BufferedWriter在每次写入()结束时使用flush()为我解决了这个问题。