bvstone

Retrieving Authorization or Other HTTP Headers With the Apache Server and RPG

Posted:

Retrieving Authorization or Other HTTP Headers With the Apache Server and RPG

I was working on a project with a customer that was using a slimmed down version of OAuth 2.0 where in the HTTP headers containing an Authorization Token.

I know that most HTTP headers are available as environment variables (or using HTTP_<headername> as the environment variable to retrieve custom headers), but this was not.  A quick search brought me to this Stack Overflow question which explains that Apache strips out the Authentication header, but also giving a workaround.

Knowing that Apache on the IBM i isn't always the same as other versions, I decided to give it a whirl anyhow.  

Step 1:  Update my Apache Configuration File (httpd.conf)

The first thing I did was add the following line to my httpd.conf file for the web server in question:

SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1

Step 2:  Restart my Apache Server Instance

The next step, to make sure that the Apache server wouldn't puke on this new configuration was to restart my Apache server instance.  I did, and what do you know, it worked (or at least it didn't crash telling me that the SetEnvIf directive was invalid)

Step 3:  Test

My next step was to test, so I wrote a simple program named HDRTEST using the eRPG SDK that looks like the following:

H DFTACTGRP(*NO) BNDDIR('ERPGSDK')                                              
 ****************************************************************               
 * Prototypes                                                   *               
 ****************************************************************               
 /COPY QCOPYSRC,P.ERPGSDK                                                       
 /COPY QCOPYSRC,P.HTTPSTD                                                       
 ****************************************************************               
 * Data read in from web page                                                   
D header          S           1024    Varying                                   
 *                                                                   
 * Work Variables                                                    
D headerValue     S           1024    Varying                        
 ****************************************************************    
  #startup();                                                        
  #writeTemplate('stdhtmlheader.erpg');                              
  #loadTemplate('hdrtest.erpg');                                     

  header = #getData('header');                                      
  headerValue = #getEnv('HTTP_' + %trim(header));      

  #replaceData('/%header%/':header);                   
  #replaceData('/%value%/':headerValue);               
  #writeSection();                                     
                                                       
  #cleanup();                                          
                                                       
  *INLR = *on;                                                                                       

The template (hdrtest.erpg) used is VERY simple and looks like this:

/%header%/ = /%value%/

Next, I used GETURI to make a request with a custom Authorization header:

GETURI URI('bvstools.com/cgi-bin/hdrtest') DATA('header=AUTHORIZATION')
PORT(443) USRHDR((Authorization 'Bearer x8x8x8x9x9x9x9x9x9x'))
SSL(*YES)
         

To my joy the proper information was returned:

HTTP/1.1 200 OK
Date: Tue, 18 Jul 2017 15:55:51 GMT
Server: Apache
Content-Length: 42
Connection: close
Content-Type: text/html; 
charset=ISO-8859-1

AUTHORIZATION = Bearer x8x8x8x9x9x9x9x9x9x                                                         

So, again with just some simple RPG you are able to work with the rest of the world as OAuth and OAuth types of authentication become more popular.                                                  


Last edited 07/18/2017 at 11:01:16



Latest Posts:

Token Has an Invalid Signature Error for Office 365 Email Token Has an Invalid Signature Error for Office 365 Email
Posted by 1 day ago
BVSTools >> BVSTools Software Discussion >> GreenTools for Microsoft Apps (G4MS) Specific Discussion
Resending Emails that have Errored Out with Updated Router or Authentication Information Resending Emails that have Errored Out with Updated Router or Authentication Information
Posted by March 1, 2019
BVSTools >> BVSTools Software Discussion >> Email Tools (MAILTOOL) Specific Discussion
BVSTools Offers Toolset to Work With HubSpot OAuth 2.0 APIs On Your IBM i BVSTools Offers Toolset to Work With HubSpot OAuth 2.0 APIs On Your IBM i
Posted by January 27, 2019
BVSTools >> BVSTools Announcements
G4MSDRV Currently Not Supported G4MSDRV Currently Not Supported
Posted by January 17, 2019
BVSTools >> BVSTools Announcements >> GreenTools for Microsoft Apps (G4MS) Specific Announcements
Removing Trailing Carriage Returns and/or Line Feeds from a String with RPG Removing Trailing Carriage Returns and/or Line Feeds from a String with RPG
Posted by December 26, 2018
Programming >> RPG Programming
Create QRCODE in DDS Create QRCODE in DDS
Posted by September 21, 2018
Programming >> RPG Programming
Base64 Encoding a File with RPG Base64 Encoding a File with RPG
Posted by September 6, 2018
Programming >> RPG Programming
Building JSON with RPG and YAJL and Writing to Standard Output Building JSON with RPG and YAJL and Writing to Standard Output
Posted by August 31, 2018
Programming >> Proof of Concept (POC)
How to Delete Files or Empty Trash From Your Google Drive with your IBM i and RPG/ILE How to Delete Files or Empty Trash From Your Google Drive with your IBM i and RPG/ILE
Posted by July 24, 2018
BVSTools >> BVSTools Software Discussion >> GreenTools for G Suite (Google Apps) (G4G) Specific Discussion
GreenTools for G Suite (G4G) Updated to Include Delete and Empty Trash Function GreenTools for G Suite (G4G) Updated to Include Delete and Empty Trash Function
Posted by July 24, 2018
BVSTools >> BVSTools Announcements >> GreenTools for G Suite (Google Apps) (G4G) Specific Announcements
What to Do If Your License Keys Don't Work What to Do If Your License Keys Don't Work
Posted by July 18, 2018
BVSTools >> BVSTools Software Discussion
MAILTOOL Updated to Allow Failed Message on Invalid Recipient MAILTOOL Updated to Allow Failed Message on Invalid Recipient
Posted by May 20, 2018
BVSTools >> BVSTools Announcements >> eMail Tool (MAILTOOL) Specific Announcements
Non HTTPS Callbacks Removed from GreenTools for G Suite (G4G) Non HTTPS Callbacks Removed from GreenTools for G Suite (G4G)
Posted by April 15, 2018
BVSTools >> BVSTools Announcements >> GreenTools for G Suite (Google Apps) (G4G) Specific Announcements
IBM i Related Survey Available IBM i Related Survey Available
Posted by April 7, 2018
IBM Power Systems >> (QGPL) IBM i
BVSTools Releases Braintree Webhook Open Source Application - Node.js BVSTools Releases Braintree Webhook Open Source Application - Node.js
Posted by April 5, 2018
Programming >> Open Source

Reply




Copyright 1983-2019 BVSTools
GreenBoard(v3) Powered by the eRPG SDK, MAILTOOL Plus!, GreenTools for Google Apps, jQuery, jQuery UI, BlockUI, CKEditor and running on the IBM i (AKA AS/400, iSeries, System i).