How many parameters does a developer need to know like '~request_method'

Question

<b>I am sorry to post it twice. I am not able to delete it!</b>
In SAP standard program 'RSHTTP01', "call method client->request->set_header_field exporting name 'request_method'  value = 'GET'." is used. How many parameters do I need to know like 'request_method'? I cannot find any document to describe it.
Message was edited by: Paul Lee

Answer 1

Hello Paul,
Please look at the following links.  It will help to explain how you can find all the documentation and how working with BSP's is done.
These are weblog's created by <a href="https://www.sdn.sap.com/sdn/weblogs.sdn?blog=/pub/u/164">Brian McKellar</a>, granted there's a lot, but it is worth it to yourself to read them at least once.
In particular please take a look at the following:
<a href="/people/brian.mckellar/blog/2003/09/30/bsp-in-depth-writing-an-http-handler">BSP In-Depth: Writing an HTTP Handler</a>
<a href="/people/brian.mckellar/blog/2003/09/30/bsp-in-depth-writing-an-http-handler">BSP Trouble Shooting: Frequently Asked (Short) Questions</a>
<a href="/people/brian.mckellar/blog/2004/06/11/bsp-trouble-shooting-getting-help">BSP Trouble Shooting: Getting Help</a>
As for in ABAP seeing documentation for values, simply double click (or F1) on the parameter, if there are docs available you will usually get them.  If the parameter is a reference to something by double clicking you usually get taken to the item, from there you try again to double click or F1 and see what you get.
So what I did was typed your program in, in SE38 and then looked at the code and found this:
if internal is initial.
      call method cl_http_client=>create
        exporting
          host               = host_str
          service            = service_str
          proxy_host         = proxy_host
          proxy_service      = proxy_service
I assume this is where you are looking so I tried to double click on "proxy_service" - nothing, I tried F1 - nothing.
So now I look at how this is a method call so I double click on "cl_http_client" and low and behold I am taking to the method itself. Now I go to the method "CREATE" (<i>cl_http_client=>create</i>) and I click on the "PARAMETERS" button at the top of the screen next to "EXCEPTIONS" I now see a bit of information and a list of all the parameters used in the create.
From here you should be able to now play around see what all used and available with this method.