如何：在C＃.NET中的httpget

Question

有人可以幫我在這裏。我已經嘗試了各種.NET的東西：

WebClient，HttpWebResponse，WebResponse等...來自網絡的各種建議。

我想讀取設備的值。這是我如何做到這一點：

C:\Users\Alexm>httpget -d -r -S "*SRTC\r" http://isd-9138:2000 
Host: isd-9138:2000, URL Host: isd-9138:2000, Name:/
GET/HTTP/1.0 
User-Agent: Mozilla/2.0 (Win95; I) 
Pragma: no-cache 
Host: isd-9138:2000 
Accept: */* 

POSTING 6 bytes... 
0027.3 
C:\Users\Alexm> 

如何在c＃中簡單地做到這一點？

謝謝！

FYI：

C:\Users\Alexm>httpget -? 
usage: httpget [options] URL 
options: 
    -d    - set debug mode 
    -q    - set quiet mode (no error printouts) 
    -f    - force data read on bad HTML 
    -h    - add HTTP result header to output stream 
    -r    - raw mode (no HTTP headers) 
    -s host[:port] - use SOCKS server "host" (optional port) 
    -p host[:port] - use proxy server "host" (optional port) 
    -C secs   - set network read timeout in seconds 
    -t secs   - set network connect timeout in seconds 
    -P file   - POST file to URL (use "-" for stdin) 
    -S string  - POST string to URL (expands \r and \n) 
    -N num   - send POST file in multiple "num" byte chunks 
    -m    - map special characters in POST data (\ quotes) 
    -c cookie  - send cookie string with request 
    -R referringURL - send referring URL with request 
    -g generic  - include specified generic header 
    -o output  - send output to file "output" (default is stdout) 
where URL is of the form "http://host[:port]/path" 

C:\Users\Alexm> 

例如這裏是一個嘗試：

try 
{ 
    string url = "http://" + IPs[0] + ":" + _DriverConfig.SensorPort.ToString(); 
    string cmd = "*SRTC\r"; 
    // url: http://10.10.11.105:2000 
    using (WebClient client = new WebClient()) 
    { 
     var response = client.UploadString(url, cmd); 
    } 
} 
catch (Exception ex) 
{ 
    Console.WriteLine(ex.Message); 
} 

ex.Message：

"The server committed a protocol violation. Section=ResponseStatusLine" 

堆棧跟蹤：

" at System.Net.WebClient.UploadDataInternal(Uri address, String method, 
Byte[] data, WebRequest& request) 
at System.Net.WebClient.UploadString(Uri address, String method, String data) 
at System.Net.WebClient.UploadString(String address, String data) 
at SensorsDaemonDLL.SensorDriver.Poll_iSDTC(Object sender, ElapsedEventArgs e)" 

另一種嘗試：

try 
{ 
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
    request.ProtocolVersion = HttpVersion.Version10; 

    request.ContentType = "application/x-www-form-urlencoded"; 
    request.Method = "POST"; 
    request.ContentLength = cmdbytes.Length; 

    Stream dataStream = request.GetRequestStream(); 
    dataStream.Write(cmdbytes, 0, cmdbytes.Length); 
    dataStream.Close(); 

    // Get the response. 
    WebResponse response = request.GetResponse(); 
    // Display the status. 

    Console.WriteLine(((HttpWebResponse)response).StatusDescription); 
    // Get the stream containing content returned by the server. 
    dataStream = response.GetResponseStream(); 
    // Open the stream using a StreamReader for easy access. 
    StreamReader reader = new StreamReader(dataStream); 
    // Read the content. 
    string responseFromServer = reader.ReadToEnd(); 
    // Display the content. 
    Console.WriteLine(responseFromServer); 
    // Clean up the streams. 
    reader.Close(); 
    dataStream.Close(); 
    response.Close(); 

} 
catch (Exception ex) 
{ 
    Console.WriteLine(ex.Message); 
    int foo = 2; 
} 

request.GetResponse（）拋出異常：

ex.Message：

"The server committed a protocol violation. Section=ResponseStatusLine" 

Answer 1

設備可能無法發送有效的響應回來。是否有可能使用像Fiddler這樣的工具並從設備上發回響應？

您也可以試試從這裏的解決方案之一： https://www.webmonkeys.org.uk/2012/09/c-the-server-committed-a-protocol-violation-sectionresponsestatusline/

一些用戶已經提到在鏈接建議的解決方案之一，已經爲他們工作。