Send and Receive Test SAP Event Mesh

1. Open the Postman.

2. Click on “New” to open a new tab on Postman to work on.

   

3. Fetch the OAuth2.0 access token to be used for authorization on all subsequent operations in same session

   

4. Provide the token endpoint URL in Postman URL from the Service Keys for the protocol type HTTPREST.

   Build the postman URL by appending the GRANTTYPE as CLIENTCREDENTIALS and RESPONSETYPE as token

   So the final postman URL should look like this:

<<tokenendpoint>>?grant_type=client_credentials&response_type=token

<<tokenendpoint>> is to be replaced with the 'tokenendpoint' field of the service key.
In the Headers tab, enter `Content-Type` as KEY and `application/x-www-form-urlencoded` as VALUE.

In the Authorization tab, select the Type as Basic Auth from the dropdown.

• In Username, provide the <clientid> value from the Service Keys for httprest protocol.

• In Password, provide the <clientsecret> value from the Service Keys for httprest protocol.

  ![postman authorization](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/postman-authorization.PNG)
  

Select the POST option in Postman and click on the Send button. You will get the access_token.

Open a new tab in the Postman.

1. Build the postman URL as below https://<uri of the rest protocol based section from Service Keys>/messagingrest/v1/queues/<Queue name>/messages. Queue name is queue name along with the namespace. Replace the / present in the namespace with %2fwhile executing.

2. Open the Headers tab add below two key-value pairs.

|       KEY      |                 VALUE                 |
| :------------- | :------------------------------------ |
|      x-qos     |                 0 or 1                |
| authorization  | Bearer <the retrieved `access_token` >|     

![postman header for publishing message](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/postman-post-header.PNG)

3. Open the Authorization tab and select the TYPE as No Auth.

![postman authorization for publishing message](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/postman-post-authorization.PNG)

4. Open the Body tab and select the type as raw. And enter some test message in the body.

![postman body for publishing message](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/Postman-Post-Body.PNG)

5. Select the POST option in Postman and click on the Send button. If sending message is successful, you shall get a status as 204 No Content.

Open a new tab in the Postman.

1. Build the postman URL as below https://< uri of the rest protocol based section from Service Keys>/messagingrest/v1/queues/<Queue name>/messages/consumption

2. Open the Headers tab add below two key value pair.

|       KEY      |                 VALUE                 |
| :------------- | :------------------------------------ |
|      x-qos     |                 0 or 1                |
| authorization  | Bearer <the retrieved `access_token` >|     

![postman header for publishing message](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/consumption-header.PNG)

3. Open the Authorization tab and select the TYPE as No Auth.

![postman authorization for publishing message](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/cp-enterprisemessaging-test-queue-sendreceive/consumption-noauth.PNG)

4. Open the Body tab and select the type as raw. And enter some test message in the body.

5. Select the POST option in Postman and click on the Send button. If sending message is successful, you shall get a status as 200 OK. And in the body tab you can view the message.