我一無所知SNP。你的代碼在接收部分有點混亂。我使用下面的示例發送和讀取HTTP GET請求的服務器響應。首先讓我們看看請求,然後檢查響應。
HTTP GET請求:
GET/HTTP/1.1
Host: 127.0.0.1
Connection: keep-alive
Accept: text/html
User-Agent: CSharpTests
string - "GET/HTTP/1.1\r\nHost: 127.0.0.1\r\nConnection: keep-alive\r\nAccept: text/html\r\nUser-Agent: CSharpTests\r\n\r\n"
服務器的HTTP響應頭:
HTTP/1.1 200 OK
Date: Sun, 07 Jul 2013 17:13:10 GMT
Server: Apache/2.4.4 (Win32) OpenSSL/0.9.8y PHP/5.4.16
Last-Modified: Sat, 30 Mar 2013 11:28:59 GMT
ETag: \"ca-4d922b19fd4c0\"
Accept-Ranges: bytes
Content-Length: 202
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html
string - "HTTP/1.1 200 OK\r\nDate: Sun, 07 Jul 2013 17:13:10 GMT\r\nServer: Apache/2.4.4 (Win32) OpenSSL/0.9.8y PHP/5.4.16\r\nLast-Modified: Sat, 30 Mar 2013 11:28:59 GMT\r\nETag: \"ca-4d922b19fd4c0\"\r\nAccept-Ranges: bytes\r\nContent-Length: 202\r\nKeep-Alive: timeout=5, max=100\r\nConnection: Keep-Alive\r\nContent-Type: text/html\r\n\r\n"
我有意中省略了服務器響應的主體,因爲我們已經知道它到底是202個字節,如指定通過響應頭中的Content-Length。
查看HTTP規範將顯示HTTP頭以空行(「\ r \ n \ r \ n」)結尾。所以我們只需要搜索它。
讓我們看看一些實際的代碼。假定一個System.Net.Sockets.Socket類型的變量套接字。
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.Connect("127.0.0.1", 80);
string GETrequest = "GET/HTTP/1.1\r\nHost: 127.0.0.1\r\nConnection: keep-alive\r\nAccept: text/html\r\nUser-Agent: CSharpTests\r\n\r\n";
socket.Send(Encoding.ASCII.GetBytes(GETrequest));
我們已經發送請求到服務器,讓我們接收並正確解析響應。
bool flag = true; // just so we know we are still reading
string headerString = ""; // to store header information
int contentLength = 0; // the body length
byte[] bodyBuff = new byte[0]; // to later hold the body content
while (flag)
{
// read the header byte by byte, until \r\n\r\n
byte[] buffer = new byte[1];
socket.Receive(buffer, 0, 1, 0);
headerString += Encoding.ASCII.GetString(buffer);
if (headerString.Contains("\r\n\r\n"))
{
// header is received, parsing content length
// I use regular expressions, but any other method you can think of is ok
Regex reg = new Regex("\\\r\nContent-Length: (.*?)\\\r\n");
Match m = reg.Match(headerString);
contentLength = int.Parse(m.Groups[1].ToString());
flag = false;
// read the body
bodyBuff = new byte[contentLength];
socket.Receive(bodyBuff, 0, contentLength, 0);
}
}
Console.WriteLine("Server Response :");
string body = Encoding.ASCII.GetString(bodyBuff);
Console.WriteLine(body);
socket.Close();
這可能是C#這樣做最壞的方法,有噸的類來處理HTTP請求和響應在.NET中,但仍,如果你需要它,它的工作原理。
是否有一個原因,你需要使用套接字而不是,比如'System.Net.Http.HttpClient'? – 2012-08-08 10:53:18
或Webclient ... – steveg89 2012-08-08 10:56:50
沒有沒有特定的原因。其實我並不知道「HttpCLient或Webclient」。但無論如何,我想了解什麼是我的上述代碼的青蛙。 – RanRag 2012-08-08 10:58:34