WinHTTP.WinHTTPRequest.5.1 Classic ASP - TLS PayPal

The following features have been added in version 5.1 of WinHTTP:

  • IPv6 support.
  • AutoProxy capabilities.
  • HTTP/1.0 protocol, including support for keep-alive (persistent) connections and session cookies.
  • HTTP/1.1 chunked transfer support for HTTP responses.
  • Keep-alive pooling of anonymous connections across sessions.
  • Secure Sockets Layer (SSL) functionality, including client certificates. Supported SSL protocols include the following: SSL 2.0, SSL 3.0, and Transport Layer Security (TLS) 1.0.
  • Support for server and proxy authentication, including integrated support for Microsoft Passport 1.4 and the Negotiate/ Kerberos package.
  • Automatic handling of redirects unless suppressed.
  • Scriptable interface in addition to the API.
  • Trace utility to help troubleshoot problems.

If you have Window 2012 server then set objHttp.option (9)to 2720

objHttp.option (9) = 2720

Reference help pages are as follows

https://forums.iis.net/t/1220682.aspx?ServerXMLHTTP 6 0 WinHttpRequest connecting to TLS 1 2 server

https://stackoverflow.com/questions/35089900/winhttp-winhttprequest-5-1-does-not-work-with-paypal-sandbox-after-tls-1-2

 

 

 

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