Create an HTTP Service

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Create an HTTP Service

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Create an HTTP Service

Julie Plummer

04/30/2019

Beginner

15 min.

Create an HTTP service in the ABAP environment that can be called from the browser.

You will learn

How to create an HTTP service
How to return system data using a (whitelisted) ABAP utility class

You can then access the ABAP system from the browser, for example to fetch a report. In this tutorial, you will simply fetch your user name and the date and time for simplicity.

Step 1: Create an HTTP service

Select a package and choose New > Other Repository Object from the context menu:
Enter the filter text HTTP and choose Next:
Enter a name and description for your service and choose Next:
Choose or create a transport request:

The new HTTP service is displayed on a new tab. The handler class and URL are generated automatically, in the form:
https://<server:port>/sap/bc/http/sap/<service_name>?sap-client=100

Image depicting step-1e-new-service-created

Done

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Step 2: Implement the handler class

Now, you will implement the handler class, starting with a simple text output.

Open the handler class by clicking on it:
The structure of the class and the interfaces statement for IF_HTTP_SERVICE_EXTENSION are generated automatically.
Go to the class implementation section and insert the following statement in the method:
response->set_text('Hello again!').

Done

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Step 3: Save and activate

Save (Ctrl+S) and activate (Ctrl+F3) your class.

Done

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Step 4: Test the service

Test your service in the browser by clicking the URL link:
If necessary, log in again. The preview open automatically in a new tab and display something like this:

Done

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Step 5: Add system date to the method

View Full Instructions

Now you will add to the method by fetching the date from the back end first.

In the ABAP environment, you can only use whitelisted APIs. Therefore, you cannot use SY-DATUM. Instead, you call the appropriate method of the class CL_ABAP_CONTEXT_INFO.

You then cast this date variable to a string variable and output that as before.

Delete the statement response->set_text('Hello again!'). and add the following to your code:

DATA(system_date) = CL_ABAP_CONTEXT_INFO=>get_system_date( ).
DATA: text type string.

text = system_date.
response->set_text( text ).

Done

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Step 6: Test the service again

Save (Ctrl+S) and activate (Ctrl+F3) your class.
Test your service by clicking the URL link again. This time, the preview should display something like this:

Done

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Step 7: Test yourself

What is the correct syntax to Implement the method `IF_HTTP_SERVICE_EXTENSION~HANDLE_REQUEST`
so that it returns the current user name (`UNAME`), not the system date. Choose only one option. DATA() = CL_ABAP_CONTEXT_INFO=>get_user_formatted_name( user_name ) DATA(user_name) = CL_ABAP_CONTEXT_INFO->get_user_formatted_name( ) DATA(user_name) = CL_ABAP_CONTEXT_INFO=>get_user_formatted_name( ).

Step 8: Copy code (optional)

View Full Instructions

Your code should look like this:


class ZCL_JP_TEST_HTTP definition
  public
  create public .

public section.

  interfaces IF_HTTP_SERVICE_EXTENSION .
protected section.
private section.
ENDCLASS.

CLASS ZCL_JP_TEST_HTTP IMPLEMENTATION.

  method IF_HTTP_SERVICE_EXTENSION~HANDLE_REQUEST.
      DATA(system_date) = CL_ABAP_CONTEXT_INFO=>get_system_date( ).
      DATA: text type string.

      text = system_date.
      response->set_text( text ).
  endmethod.
ENDCLASS.

Done

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Next Steps

Navigate tutorial steps

Step 1: Create an HTTP service
Step 2: Implement the handler class
Step 3: Save and activate
Step 4: Test the service
Step 5: Add system date to the method
Step 6: Test the service again
Step 7: Test yourself
Step 8: Copy code (optional)
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Create an HTTP Service

Create an HTTP Service

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