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User Authentication and Read XML from URL in ASP.NET

FairGuy
FairGuy asked
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Last Modified: 2012-05-06
User Authentication*:

In API I need to have authentificate by "user name" and your "password".
First, I have to request an api-signature by requesting "http://www.xyz.com/api/get_api_signature.php".
Next, I have to build an auth_token. auth_token=md5(md5(password)+api_signature).
At last I have to send your "user name" (auth_user_name=<user_name>), the requested "api-signature" (api_signature=<api_signature>) and  auth_token (auth_token=<auth_token>) with normal api-request.
The Api-Signature is valid for 1 minute.

Example :
1. Request api-signature: GET -> http://www.xyz.com/api/get_api_signature.php
2. Answer of the request: "8b55eac3b2291b201fc59cd8b76410ab"
3. Build auth_token:
    md5(md5("testpassword")+"8b55eac3b2291b201fc59cd8b76410ab") =
    md5("e16b2ab8d12314bf4efbd6203906ea6c"+"8b55eac3b2291b201fc59cd8b76410ab") =
    "c8b066236c8cbcc280921b93f24e281a"
4. Parameters:
    auth_user_name="testuser",
    api_signature="8b55eac3b2291b201fc59cd8b76410ab",
    auth_token="c8b066236c8cbcc280921b93f24e281a"
5. Request: http://www.xyz.com/api/get_photos_xml.php?category=submitted&auth_user_name=testuser&api_signature=8b55eac3b2291b201fc59cd8b76410ab&auth_token=c8b066236c8cbcc280921b93f24e281a&user_name=testuser&size=large&locr=true

Now how I execute these steps in ASP.net 2.
Result of URL need to take it in Data Set to display in Grid.

Thanks,
Regards,
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