Authorization to a proxy server via HTTP

Date Entered:  12/11/1997

Last Update:  06/04/2004

APPLIES TO

SYNOPSIS

I've changed to a proxy server and that needs proxy authentication. My requests now fail with: "407 proxy authenticate required", although I tried using the "USER" and "PASSWORD" property.

SOLUTION

The .User and .Password properties calculate the authorization string and send it to the web site. For proxy authentication you should use the ProxyUser and ProxyPassword properties.

In older versions of IP*Works!, it is necessary to set the Proxy-Authorization header yourself manually:

To calculate the authorization string you may assign values to .User and .Password properties and read the .Authorization property as shown in the following example. (This needs to be done only once to calculate the Authorization string using the Basic Authentication scheme.)

     'calculate the authorization string
     HTTP1.User = "myname" 'put your proxy login name here
     HTTP1.Password = "mypassword" 'put your proxy password here
     HTTP1.OtherHeaders = "Proxy-Authorization: " + _
          HTTP1.Authorization + chr(13) + chr(10)

     'empty string because authorization is only for the proxy
     HTTP1.User = "" 
     HTTP1.Password = ""

All your requests going through the proxy server should contain the "Proxy-Authorization: ..." header at .OtherHeaders property.

Please check the help files for help on individual properties.

Please remember also that changing the server value when assigning a value to .URL property clears the values for User and Password. This is for security reasons.