(C#) HTTP Redirect Handling

Examine HTTP redirects.

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

string url;
string html;
int status;

// Please note: The URL used in this example was a valid redirect many years ago,
// but the site does not exist any longer..
url = "http://www.planyourweddingonline.co.za/";

// The FollowRedirects property controls whether redirects
// are automatically followed.  The default behavior is to
// automatically follow redirects.

// Explicitly set FollowRedirects so that redirects are automatically taken:
http.FollowRedirects = true;

// Send the HTTP GET and return the content in a string.
html = http.QuickGetStr(url);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
}

// On success, LastErrorText will provide information about
// what happened during the call.
Debug.WriteLine("--------------- LastErrorText ------------------");
Debug.WriteLine(http.LastErrorText);
Debug.WriteLine("------------------------------------------------");

// In this case, we see something like this:
// ChilkatLog:
//   QuickGetHtml:
//     DllDate: Jul 27 2007
//     url: http://www.planyourweddingonline.co.za/
//     httpServer: www.planyourweddingonline.co.za
//     port: 80
//     StatusCode: 302
//     StatusText: Found
//     Reading chunked response
//     redirectUrl: main/main/home/index.php
//     url: http://www.planyourweddingonline.co.za/main/main/home/index.php
//     StatusCode: 302
//     StatusText: Found
//     Reading chunked response
//     redirectUrl: /main/main/home/index.php?SMC=1
//     url: http://www.planyourweddingonline.co.za/main/main/home/index.php?SMC=1
//     StatusCode: 200
//     StatusText: OK
//     CompressedSize: 7434
//     UncompressedSize: 40999

// Was the GET redirected?
if (http.WasRedirected == true) {
    Debug.WriteLine("Chilkat HTTP followed the redirect.");

    // Display the final redirect URL:
    Debug.WriteLine("Final URL:");
    Debug.WriteLine(http.FinalRedirectUrl);

    // Note the HTML returned is from the final redirect URL.

}
else {
    Debug.WriteLine("Not redirected.");
}

status = http.LastStatus;
if (status == 200) {
    Debug.WriteLine("status = 200, OK!");
}
else {
    Debug.WriteLine("HTTP Response status = " + Convert.ToString(status));

    // Display the complete response header.
    Debug.WriteLine(http.LastResponseHeader);
}

// Now try it without following redirects:
Debug.WriteLine("-------- Now trying without following redirects....");
http.FollowRedirects = false;

// Send the HTTP GET and return the content in a string.
html = http.QuickGetStr(url);
if (http.LastMethodSuccess != true) {
    // the HTML string can NULL if a 302 redirect response is received.
    Debug.WriteLine("HTML string returned NULL...");
}

// On success, LastErrorText will provide information about
// what happened during the call.
Debug.WriteLine("--------------- LastErrorText ------------------");
Debug.WriteLine(http.LastErrorText);
Debug.WriteLine("------------------------------------------------");

// In this case, we see something like this:
// ChilkatLog:
//   QuickGetHtml:
//     DllDate: Jul 27 2007
//     url: http://www.planyourweddingonline.co.za/
//     StatusCode: 302
//     StatusText: Found
//     Reading chunked response
//     redirectUrl: main/main/home/index.php

// Was this a redirect?  Even if FollowRedirects is false,
// WasRedirected will be true (non-zero) if the response
// indicated a redirect.
if (http.WasRedirected == true) {
    Debug.WriteLine("This was a redirect response");

    // When redirects are not followed, FinalRedirectUrl
    // contains the redirect URL that would've been taken...
    // Display the redirect URL, which was not taken...
    Debug.WriteLine("Redirect URL:");
    Debug.WriteLine(http.FinalRedirectUrl);

}
else {
    Debug.WriteLine("Not redirected.");
}

status = http.LastStatus;
if (status == 200) {
    Debug.WriteLine("status = 200, OK!");
}
else {
    Debug.WriteLine("HTTP Response status = " + Convert.ToString(status));

    // Display the complete response header.
    Debug.WriteLine(http.LastResponseHeader);
}