Request / corresponding model
Mainly 3 classes: URI, WebRequest, WerResponse.
And Internet communication processes:
1): Create
WebRequest
WebRequest WREQ = WebRequest.create ("
http://www.contoso.com/ ");
2)
Set any required attribute values in WebRequest. For example, if you want to support authentication, please
Credentials
Attribute settings
Networkcredential
Instance of class
Wreq.credentials =
New NetworkCredential (UserName, SecureLyStoredPassword);
To access
HttpWebRequest
HTTP-specific properties, please
WebRequest conversion is
HttpWebRequest (otherwise processed).
3): Download resources from Internet, call
WebRequest
GetResponse
method. transfer
WebRequest
GetRequestStream
Method, and use results
Stream
Object written data,
WebResponse WRESP = WREQ.GETRESPONSE ();
4): GetResponseSstream method Gets streams that contain response data from network resources.
Stream Respstream = WRESP.GETRESPONSESTREAM ();
StreamReader Reader = New StreamReader (RESPSTREAM, Encoding.ASCII);
String resphtml = reader.readToend ();
Console.writeline (Resphtml);
RESPSTREAM.CLOSE (); // Don't forget this step.
Httpwebrequest.contentType
Get or set
The value of the Content-Type HTTP header.
HttpWebRequest.Method property
Get or set up a request
You can set the Method property to any HTTP 1.1 protocol predicate: GET, HEAD, POST, PUT, DELETE, TRACE, or OPTIONS.
If the ContentLength property is set to -1, you must set the Method property to the protocol properties of upload data.
HttpWebRequest.contentLength attribute
The number of bytes to be sent to the Internet resource. The default is -1, which indicates that this property has not been set and the request data to be sent.
The ContentLength property contains the Content-Length HTTP header value to be sent as a request.
In addition to any value other than -1, the ContentLength property indicates that the upload data is allowed to set upload data only in the Method property.
Once the ContentLength property is set to a value, the number of bytes must be written to the request stream returned by calling getRequestStream or simultaneously calling BegingerEtRequestStream and EndgetRequestStream.
string postData = "firstone =" inputData; ASCIIEncoding encoding = new ASCIIEncoding (); byte [] byte1 = encoding.GetBytes (postData); // Set the content type of the data being posted.myHttpWebRequest.ContentType = "application / x -www-form-urlencoded "; // Set the content length of the string being posted.myHttpWebRequest.ContentLength = postData.Length; Stream newStream = myHttpWebRequest.GetRequestStream (); newStream.Write (byte1,0, byte1.Length); Console.writeline ("The value of 'contentLength' Property After Sending The Data IS {0}", MyHttpWebRequest.contentLength; newstream.close ();
