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Learn more about: Steps in a Typical Internet Client Application |
Steps in a Typical Internet Client Application |
11/04/2016 |
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7aba135c-7c15-4e2f-8c34-bbaf792c89a6 |
The following table shows the steps you might perform in a typical Internet client application.
| Your goal | Actions you take | Effects |
|---|---|---|
| Begin an Internet session. | Create a CInternetSession object. | Initializes WinInet and connects to server. |
| Set an Internet query option (time-out limit or number of retries, for example). | Use CInternetSession::SetOption. | Returns FALSE if operation was unsuccessful. |
| Establish a callback function to monitor the status of the session. | Use CInternetSession::EnableStatusCallback. | Establishes a callback to CInternetSession::OnStatusCallback. Override OnStatusCallback to create your own callback routine. |
| Connect to an Internet server, intranet server, or local file. | Use CInternetSession::OpenURL. | Parses the URL and opens a connection to the specified server. Returns a CStdioFile (if you pass OpenURL a local file name). This is the object through which you access data retrieved from the server or file. |
| Read from the file. | Use CInternetFile::Read. | Reads the specified number of bytes using a buffer you supply. |
| Handle exceptions. | Use the CInternetException class. | Handles all common Internet exception types. |
| End the Internet session. | Dispose of the CInternetSession object. | Automatically cleans up open file handles and connections. |
Win32 Internet Extensions (WinInet)
Prerequisites for Internet Client Classes
Writing an Internet Client Application Using MFC WinInet Classes