CInternetSession Class

아티클
04/28/2015

Creates and initializes a single or several simultaneous Internet sessions and, if necessary, describes your connection to a proxy server.

class CInternetSession : public CObject

Members

Public Constructors

Name	Description
CInternetSession::CInternetSession	Constructs a CInternetSession object.

Public Methods

Name	Description
CInternetSession::Close	Closes the Internet connection when the Internet session is terminated.
CInternetSession::EnableStatusCallback	Establishes a status callback routine.
CInternetSession::GetContext	Closes the Internet connection when the Internet session is terminated.
CInternetSession::GetCookie	Returns cookies for the specified URL and all its parent URLs.
CInternetSession::GetCookieLength	Retrieves the variable specifying the length of the cookie stored in the buffer.
CInternetSession::GetFtpConnection	Opens an FTP session with a server. Logs on the user.
CInternetSession::GetGopherConnection	Opens a gopher server for an application that is trying to open a connection.
CInternetSession::GetHttpConnection	Opens an HTTP server for an application that is trying to open a connection.
CInternetSession::OnStatusCallback	Updates the status of an operation when status callback is enabled.
CInternetSession::OpenURL	Parses and opens a URL.
CInternetSession::SetCookie	Sets a cookie for the specified URL.
CInternetSession::SetOption	Sets options for the Internet session.

Public Operators

Name	Description
CInternetSession::operator HINTERNET	A handle to the current Internet session.

Remarks

If your Internet connection must be maintained for the duration of an application, you can create a CInternetSession member of the class CWinApp.

Once you have established an Internet session, you can call OpenURL. CInternetSession then parses the URL for you by calling the global function AfxParseURL. Regardless of its protocol type, CInternetSession interprets the URL and manages it for you. It can handle requests for local files identified with the URL resource "file://". OpenURL will return a pointer to a CStdioFile object if the name you pass it is a local file.

If you open a URL on an Internet server using OpenURL, you can read information from the site. If you want to perform service-specific (for example, HTTP, FTP, or gopher) actions on files located on a server, you must establish the appropriate connection with that server. To open a particular kind of connection directly to a particular service, use one of the following member functions:

GetGopherConnection to open a connection to a gopher service.
GetHttpConnection to open a connection to an HTTP service.
GetFtpConnection to open a connection to an FTP service.

SetOption allows you to set the query options of your session, such as time-out values, number of retries, and so on.

CInternetSession member functions SetCookie, GetCookie, and GetCookieLength provide the means to manage a Win32 cookie database, through which servers and scripts maintain state information about the client workstation.

For more information about basic Internet programming tasks, see the article Internet First Steps: WinInet. For general information about using the MFC WinInet classes, see the article Internet Programming with WinInet.

Note

CInternetSession will throw an AfxThrowNotSupportedException for unsupported service types. Only the following service types are currently supported: FTP, HTTP, gopher, and file.

Inheritance Hierarchy

CObject

CInternetSession

Requirements

Header: afxinet.h

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