[SalesForce] How to know the Rest Request and Response size

I am writing an Apex Rest web service and I do not want to hit the cap of 6 MB on request or response payload or the 12 MB limit for asynchronous APEX.

But the size of the request and responses are not logged in the Debug Logs. Do I have to adjust the Debug Level to get it logged? If not, how can I view them?

Edit:
Here is my Apex Rest Web Service Method signature. Can I or can I not hit Salesforce 6 MB limits with this?

    @HttpPatch
    global static String updateBusinessPartner(List<BusinessPartnerUpdatedInfo> businessPartnerList) {
        //some processing here
    RestRequest incomingRequest = RestContext.request;
    System.debug('incomingRequest body:' + incomingRequest.requestBody);//prints null 
    //all the data of the request is inside the List object in the method parameter. requestBody is NULL
    }

How do I get the incoming request size?

Best Answer

You can Use HTTPRequest and HTTPResponse class method getBodyAsBlob(); to get the response body in blob and then you can check the size.

httpRequest.getBodyAsBlob().size();

httpResponse.getBodyAsBlob().size();

Then you can use this size in your code.

Related Solutions

[SalesForce] Authorization header missing from RestRequest headers map

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If you are using the a Salesforce login with OAuth use UserInfo.getSessionId() to get the Authorization data.

I created a public REST service that uses a shared key for authorization. As a workaround I added a custom header called AuthorizationToken. By checking to ensure this is present and valid I can authorize a call.

[SalesForce] RestResponse does not return expected statuc code in Apex Rest unit test

With the help of @Eric I finally figure out the problem. It is not related to System.runAs(). runAs() works well in the test case.

Root cause: The response from RestContext.reponse in Test Class is different from what we are getting through the Apex REST endpoint.

For example:

@RestResource(urlMapping='/MyRest/*')
global class MyRestController {
    @HttpGet
    global static String myRest() {
        RestRequest req = RestContext.request;
        RestResponse res = RestContext.response;

        return 'From myRest';
    }
}

You will get

In Apex Test:

RestResponse:[headers={}, responseBody=null, statusCode=null]

When calling the Apex REST endpoint with REST client:

Status: 200 OK Body: "From myRest"

Salesforce Apex REST helps you to return status 200 and set the response body to the return String of myRest(). However this behaviour does not reflect in RestContext.response of Apex Rest test case. You have to explicitly set it in the code if you want to test the response...

@RestResource(urlMapping='/MyRest/*')
global class MyRestController {
    @HttpGet
    global static String myRest() {
        RestRequest req = RestContext.request;
        RestResponse res = RestContext.response;

        // set the status code and response body for test case
        res.statusCode = 200;
        res.responseBody = Blob.valueOf('From myRest');

        return 'From myRest';
    }
}