Class HttpClient

An HTTP wrapper class that abstracts away the common needs for adding post keys and firing update events as data is received. This class is real easy to use with many common operations requiring single method calls.

The class also provides automated cookie and state handling, GZip compression decompression, simplified proxy and authentication mechanisms to provide a simple single level class interface. The underlying WebRequest is also exposed so you will not loose any functionality from the .NET BCL class.

System.Object
Westwind.InternetTools.HttpClient

public class HttpClient : object

Class Members

Member		Description
	Constructor	The HttpClient Default Constructor
	ReceiveData	Fires progress events when receiving data from the server
	SendData	Fires progress events when using GetUrlEvents() to retrieve a URL.
	AddPostFile	Allows posting a file to the Web Server. Make sure that you set PostMode public bool AddPostFile(string Key, string FileName);
	AddPostKey	Adds POST form variables to the request buffer. PostMode determines how parms are handled. public void AddPostKey(string Key, Byte[] Value); public void AddPostKey(string Key, string Value); public void AddPostKey(string FullPostBuffer); public void AddPostKey(Byte[] FullPostBuffer);
	CreateWebRequestObject	Creates a new WebRequest instance that can be set prior to calling the various Get methods. You can then manipulate the WebRequest property, to custom configure the request. public bool CreateWebRequestObject(string Url);
	DownloadBytes	Retrieves URL into an Byte Array. public Byte[] DownloadBytes(string url, long bufferSize);
	DownloadFile	Writes the output from the URL request to a file firing events. public bool DownloadFile(string url, long bufferSize, string outputFile);
	DownloadResponse	Return an HttpWebResponse object for a request. You can use the Response to read the result as needed. This is a low level method. Most of the other 'Get' methods call this method and process the results further. public HttpWebResponse DownloadResponse(string url);
	DownloadStream	Return a the result from an HTTP Url into a StreamReader. Client code should call Close() on the returned object when done reading. public StreamReader DownloadStream(string url);
	DownloadString	Returns the content of a URL as a string using a specified Encoding public string DownloadString(string url, long bufferSize, Encoding encoding);
	DownloadStringPartial	Returns a partial response from the URL by specifying only given number of bytes to retrieve. This can reduce network traffic and keep string formatting down if you are only interested a small port at the top of the page. Also returns full headers. public string DownloadStringPartial(string url, int size);
	ResetPostData	Resets the Post buffer by clearing out all existing content public void ResetPostData();
	SetPostStream	public void SetPostStream(Stream postStream);
	BufferSize	The buffersize used for the Send and Receive operations
	Cancelled	Returns whether the last request was cancelled through one of the events.
	ContentType	Use this option to set a custom content type. If possible use PostMode to specify a predefined content type as it will ensure that Post data is appropriately formatted.
	Cookies	Holds the internal Cookie collection before or after a request. This collection is used only if HandleCookies is set to .t. which also causes it to capture cookies and repost them on the next request.
	Error	Error flag if an error occurred.
	ErrorMessage	Error Message if the Error Flag is set or an error value is returned from a method.
	HandleCookies	If set to true will automatically track cookies between multiple successive requests on this instance. Uses the CookieCollection property to persist cookie status.
	IgnoreCertificateErrors	Sets the certificate policy.
	Password	Password for Authentication.
	PostMode	Determines how data is POSTed when when using AddPostKey() and other methods of posting data to the server. Support UrlEncoded, Multi-Part, XML and Raw modes.
	ProxyAddress	Address of the Proxy Server to be used. Use optional DEFAULTPROXY value to specify that you want to IE's Proxy Settings
	ProxyBypass	Semicolon separated Address list of the servers the proxy is not used for.
	ProxyPassword	Password for a password validating Proxy. Only used if the proxy info is set.
	ProxyUsername	Username for a password validating Proxy. Only used if the proxy info is set.
	ThrowExceptions	Determines whether errors cause exceptions to be thrown. By default errors are handled in the class and the Error property is set for error conditions. (not implemented at this time).
	Timeout	Timeout for the Web request in seconds. Times out on connection, read and send operations. Default is 30 seconds.
	UseGZip	Determines whether requests attempt to use GZip when retrieving content from the server.
	UserAgent	Lets you specify the User Agent browser string that is sent to the server. This allows you to simulate a specific browser if necessary.
	Username	User name used for Authentication. To use the currently logged in user when accessing an NTLM resource you can use "AUTOLOGIN".
	WebRequest	WebRequest object that can be manipulated and set up for the request if you called .
	WebResponse	WebResponse object that is accessible after the request is complete and allows you to retrieve additional information about the completed request.

Requirements

Namespace: Westwind.InternetTools
Assembly: westwind.utilities.dll