Re: Unsupported_grant_type

[Scott Klement <sk@xxxxxxxxxxxxxxxx>]

Tony,

I'm not familiar with this web service or the error that you're getting.

Please understand that HTTPAPI is just a communication tool.  It 
communicates your message to an HTTP server, and communicates that 
server's response to you.  If the server (as opposed to HTTPAPI) sends 
back an error message, it does not indicate a problem in HTTPAPI.  In 
fact, quite the opposite, it tells you that HTTPAPI is doing it's job 
and handling the communication.

As an analogy, a telephone is a communications device for humans 
(whereas HTTPAPI is for programs.)  Consider the situation where you 
call your boss and ask for a raise.  Of course we'd all like nothing 
better than to hear "yes, absolutely!"  But, if he gives you a negative 
response like "sorry, can't do that", it does NOT mean your telephone is 
broken.

Likewise, HTTPAPI has sent your data to the web service just as you 
asked it to.  We'd all love to get back "success! good job!", but if the 
message is negative like "unsupported grant type" (or any other 
message)  it does NOT mean that HTTPAPI is broken.  If you want to know 
why you're getting that message, you need to discuss that with whomever 
the expert on the web service is.

Having said that, I could take some guesses...

You're sending a content-type of application/x-www-form-urlencoded -- 
this does not seem to match the data you're sending.  That is the 
content-type that a browser uses when submitting an HTML <form> tag, or 
data formatted in that same way.  But you are sending raw JSON data -- 
seems very unlikely that that is the correct type for that.  You might 
try "application/json" instead?  Or ask the web service provider what 
the proper content-type would be?

The other strong possibility is that you've formatted your JSON data 
wrong.  I can't comment on this since I haven't a clue what the right 
format is, and I'm also not familiar with the jsonNode() stuff you're 
using.  Of course, creating a debug log with the http_debug() API would 
show exactly what is sent -- but without knowing what the web service 
requires, I couldn't tell you if it is right/wrong.

-SK



On 6/29/2016 4:14 PM, Tony Cesarios wrote:
>      [cid:image001.gif@01D1D29E.B68350E0]
>
>     Hi,
>
>
>     Attempting to create a simple RPG program which will obtain a
>     access-token, however when doing the http_url_post I receive back an
>     error "unsupported_grant_type".
>
>
>     Program is using a combination of HTTPAPI and powerEXT.
>
>
>     Here's the code as it stands:
>
>
>     /copy pextcd2/qsrc,pxapihdr      General
>     H-Spec's
>
>
>
>      * powerEXT Service Program
>     Connector
>
>      /copy pextcd2/qsrc,pxapicgicn    Basic HTTP connecter & Productivity
>     Services
>
>      /copy pextcd2/qsrc,pxapijsncn    YAJL JSON connector
>
>
>
>      * Support for HTTPAPI by Scott
>     Klement
>
>      /copy
>     qrpglesrc,httpapi_h
>
>
>
>      * Declare Internal
>     Variables
>
>     d dsp             s
>     50A
>
>     d dspwait         s
>     1A
>
>
>
>     d rc              s             10I
>     0
>
>     d i               s             10I
>     0
>
>
>
>     d url             s           2048A   Varying
>
>
>
>     d tmpFile         s            256a
>     varying
>
>
>      /free
>
>       // Clear powerEXT Service Program & Responce Object
>
>       clearSrvPgm();
>
>
>       // construct a JSON message with powerEXT JSON support
>
>
>       setContent('*none');
>
>
>       jsonNode('*object');
>
>           jsonNode('*string':'grant_type=':'password');
>
>           jsonNode('*string':'username=':'PSI');
>
>           jsonNode('*string':'password=':'Rohit66');
>
>       jsonEndNode();
>
>
>       // Construct a temporary result file name for HTTPAPI
>
>
>       tmpFile = '/tmp/tst'+uniqueKey+'.json';
>
>
>       // Setup HTTPAPI Url and parms
>
>       HTTP_debug(*on);
>
>       HTTP_SetCCSIDs(1208:0);
>
>       HTTP_SetFileCCSID(1208);
>
>       url = 'https://202.47.1.145/adfAPI/token';
>
>
>       // Send HTTPAPI Request
>
>       rc = http_url_post( url
>
>                         : bufAddr()
>
>                         : bufSize()
>
>                         : tmpfile
>
>                         : HTTP_TIMEOUT
>
>                         : HTTP_USERAGENT
>
>                         : 'application/x-www-form-urlencoded');
>
>
>       // HTTPAPI Error Handling
>
>       if rc <> 1;
>
>         dsply %char(rc);
>
>         dsp = http_error;
>
>         dsply  dsp;
>
>         *inlr = *on;
>
>         return;
>
>       endif;
>
>
>       // Display HTTPAPI result with qcmd method
>
>       qcmd('dspf (''' + tmpFile + ''')');
>
>
>       // Delete object with qcmd method
>
>       qcmd('del (''' + tmpFile + ''')');
>
>
>       *inlr = *on;
>
>      /end-free
>
>
>
>
>
>     Regards,
>
>     Tony Cesarios
>
>
>
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