.NET 套接字网络服务器 HTTP POST 请求正文
我正在用 C# 做一个嵌入式项目，并且编写了一个基于套接字的 Web 服务器。一切正常，除了我一生都无法获得请求正文。 Content-Length 表示有 12 个字符，但 socket.Recieve 方法仅获取标头。
while (true)
{
using (Socket clientSocket = listeningSocket.Accept())
{
IPEndPoint clientIP = clientSocket.RemoteEndPoint as IPEndPoint;
Debug.Print("Received request from " + clientIP.ToString());
var x = clientSocket.RemoteEndPoint;
int availableBytes = clientSocket.Available;
Debug.Print(DateTime.Now.ToString() + " " + availableBytes.ToString() + " request bytes available");
int bytesReceived = (availableBytes > maxRequestSize ? maxRequestSize : availableBytes);
if (bytesReceived > 0)
{
byte[] buffer = new byte[bytesReceived]; // Buffer probably should be larger than this.
int readByteCount = clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);
using (Request r = new Request(clientSocket, Encoding.UTF8.GetChars(buffer)))
{
Debug.Print(DateTime.Now.ToString() + " " + r.URL);
if (requestReceived != null) requestReceived(r);
}
}
}
Thread.Sleep(10);
}
availableBytes = 499
bytesReceived = 499
readByteCount = 487（短12个字符）
我在这里缺少什么？如果有什么区别的话，正文是多部分表单数据。
I am doing an embedded project in C# and I have written a socket based web server. Everything works well, except I can't for the life of me get the request body. Content-Length says that there is 12 characters, but the socket.Recieve method only gets the headers.
while (true)
{
using (Socket clientSocket = listeningSocket.Accept())
{
IPEndPoint clientIP = clientSocket.RemoteEndPoint as IPEndPoint;
Debug.Print("Received request from " + clientIP.ToString());
var x = clientSocket.RemoteEndPoint;
int availableBytes = clientSocket.Available;
Debug.Print(DateTime.Now.ToString() + " " + availableBytes.ToString() + " request bytes available");
int bytesReceived = (availableBytes > maxRequestSize ? maxRequestSize : availableBytes);
if (bytesReceived > 0)
{
byte[] buffer = new byte[bytesReceived]; // Buffer probably should be larger than this.
int readByteCount = clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);
using (Request r = new Request(clientSocket, Encoding.UTF8.GetChars(buffer)))
{
Debug.Print(DateTime.Now.ToString() + " " + r.URL);
if (requestReceived != null) requestReceived(r);
}
}
}
Thread.Sleep(10);
}
availableBytes = 499
bytesReceived = 499
readByteCount = 487 (12 characters short)
What am I missing here? The body is multipart form data if that makes any difference.
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评论（2）
如果
maxRequestSize是 487，那么您将得到您描述的结果。另请记住
Content-Length不是字节 - 它是八位字节：HTTP 标头中的“Content-Length”字段是什么？（好吧，我很迂腐 - 八位字节是 8 位；））If
maxRequestSizeis 487, then you will get the results you describe.Also remember
Content-Lengthis not bytes - it's octets: What's the "Content-Length" field in HTTP header? (OK I'm being pedantic - and octet is 8 bits ;))我想知道
Available属性有多可靠。看起来它只对非阻塞套接字有用，然后仅作为布尔标志表示某物可用。为什么不直接循环读取流并解析消息呢？
I wonder how reliable that
Availableproperty is. It looks like it's only useful for non-blocking sockets, and then only as a boolean flag saying that something is available.Why not just read the stream in a loop parsing messages as you go?