Re: recvresp(): end with err

[Scott Klement <sk@xxxxxxxxxxxxxxxx>]

Todd,

The idea is that HTTPAPI can stop in the middle of running it's code, 
and call a routine (subprocedure) of yours.  Depending on what you're 
trying to do, there are different spots where it can call your 
routines.  These "spots" are called "exit points" (points at which 
HTTPAPI exits it's own processing and runs your code.)   The procedure 
that it calls is called an "exit procedure."

In this example, you want to add an additional HTTP header to the 
request header stream.  HTTPAPI has an exit point called 
HTTP_POINT_ADDL_HEADER that's designed specifically for doing this. So 
before doing your POST (or whatever HTTP calls you're doing) you'll want 
to call http_xproc() to set up this exit procedure.

Let's say your subprocedure is called AddHttpHeader() for the sake of 
example, you'd code this:

http_xproc( HTTP_POINT_ADDL_HEADER
          : %paddr(AddHttpHeader) );

Now any time HTTPAPI is sending HTTP headers, it'll call your routine, 
and your routine is able to add any headers it likes to the request.   
In this example, you want to add the 'connection: close' header, so 
you'd do this:



P AddHttpHeader   B
D                 PI
D    Header                  32767a   varying
 /free
    Header = 'Connection: close' + x'0d25';
 /end-free
P                 E

So HTTPAPI will add the Connection: close header to the request. This 
tells the HTTP server that it should close the connection (i.e. 
disconnect) after sending your response.   I'm guessing that your server 
is already doing this... but right now HTTPAPI isn't expecting it to.   
With this header, it should be the expected behavior, so this might work 
for you.

-SK




On 5/17/2013 12:59 PM, Todd Carmosino wrote:
>     Hi Scott -
>     Thank you very much for the response! The DHL rep does use the word
>     "legacy" often during project meetings.
>     Because your examples are so very good, I have not explored some of the
>     more esoteric (for me at least) options with HTTPAPI.
>     I see EXAMPLE2 has the http_xproc, but what exit point event constant
>     should I use.  Also is the exact syntax for the "connection: close"?
>     Thank you again...
>     Todd Carmosino

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