阅读的NetworkStream不进流 [英] Reading NetworkStream doesn't advance stream

问题描述

我有其中服务器传送一个4字节整数，指定下一个传输是多大将是一个客户机 - 服务器应用程序。当我看到在客户端的4字节整数（指定FILE_SIZE），下一次我读的流，我得到FILE_SIZE + 4个字节读取。

我需要指定从此流读取时的偏移量为4，或者是有什么办法可以自动前进的NetworkStream，所以我的偏移可始终为0？

服务器

 的NetworkStream theStream = theClient.getStream（）; 
 
 // ... 
 //计算文件大小的FileInfo和投入的byte []大小
 // ... 
 
 theStream。写（大小，0，size.Length）; 
 theStream.Flush（）; 
  

客户端

 的NetworkStream theStream = theClient.getStream（）; 
 
 //读取大小
字节[] =尺寸新的字节[4]; 
 INT读取动作= theStream.Read（大小，0，4）; 
 
 ... 
 
 //读取内容
字节[] =内容新的字节[4096]; 
读取动作= theStream.Read（含量为0，4096）; 
 
 Console.WriteLine（读取动作）; //<  - 打印文件大小+ 4 
  

解决方案

右键;找到了; FileInfo.Length 是长;你要调用：

  binWrite.Write（fileInfo.Length）; 
  

写8个字节，小尾数。然后你看的回通过：

 文件大小= binRead.ReadInt32（）; 
  

其中的小尾数会给你同一个值（32位， 至少）。你有4 00 字节闲置在流，虽然（从高字节长） - 因此，4字节的不匹配

使用之一：

• binWrite.Write（（INT）fileInfo.Length）;


• 文件大小= binRead.ReadInt64（）;

I have a client-server application where the server transmits a 4-byte integer specifying how large the next transmission is going to be. When I read the 4-byte integer on the client side (specifying FILE_SIZE), the next time I read the stream I get FILE_SIZE + 4 bytes read.

Do I need to specify the offset to 4 when reading from this stream, or is there a way to automatically advance the NetworkStream so my offset can always be 0?

SERVER

NetworkStream theStream = theClient.getStream();

//...
//Calculate file size with FileInfo and put into byte[] size
//...

theStream.Write(size, 0, size.Length);
theStream.Flush();

CLIENT

NetworkStream theStream = theClient.getStream();

//read size
byte[] size = new byte[4];
int bytesRead = theStream.Read(size, 0, 4);

...

//read content
byte[] content = new byte[4096];
bytesRead = theStream.Read(content, 0, 4096);

Console.WriteLine(bytesRead); // <-- Prints filesize + 4 

解决方案

Right; found it; FileInfo.Length is a long; your call to:

binWrite.Write(fileInfo.Length);

writes 8 bytes, little-endian. You then read that back via:

filesize = binRead.ReadInt32();

which little-endian will give you the same value (for 32 bits, at least). You have 4 00 bytes left unused in the stream, though (from the high-bytes of the long) - hence the 4 byte mismatch.

Use one of:

• binWrite.Write((int)fileInfo.Length);
• filesize = binRead.ReadInt64();

这篇关于阅读的NetworkStream不进流的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！