HttpRequest to SAP encoding $ and space caracters

Question

I have a wierd problem: I'm calling SAP from salesforce apex and I have trouble with one of my request.

This one is working.

    request.setEndpoint(authentification_details.Webservice_enpoint__c+'/v1/product/ProductMasterSet(product=\''+productCode+ '\')?$format=json');

But the next one is not working

request.setEndpoint(authentification_details.Webservice_enpoint__c+'/v1/product/ProductsSet?$filter=Productdescription eq \'XXXXXX\' and Language eq \'EN\'');

(XXXX is just a product code). I got a 400 code and the call never reach the SAP side. I played around a bit and think i figured out that the '$' sign is possibly responsible for the error, because when i test in postman this is working.

EDIT: it was the spaces responsible for the errors (see answer below)

I did try encoding the $ sign using exa (%24) and unicode ($) Exa is not reaching SAP either but unicode is but is not interpreted correctly on SAP Side.

Does anyone has had this problem before? is there a way to force the encoding of my request so it's like postman?

Thanks in advance

Answer 1

The $ doesn't seem to cause any issues in a quick test I just performed. I created an endpoint at beeceptor.com, added a remote site setting and then ran this code via execute anonymous in my scratch org:

HttpRequest req = new HttpRequest();
String productCode = 'bob1234';
req.setEndpoint('https://quotes.free.beeceptor.com/v1/product/ProductMasterSet(product=\''+productCode+ '\')?$format=json');
req.setMethod('POST');
HttpResponse res = new Http().send(req);

For the second request, the spaces appear to cause a 400 error. I also ran this code:

HttpRequest req = new HttpRequest();
String productCode = 'bob1234';
// req.setEndpoint('/v1/product/ProductMasterSet(product=\''+productCode+ '\')?$format=json');
String url = 'https://quotes.free.beeceptor.com/v1/product/ProductsSet?$filter=Productdescription eq \'XXXXXX\' and Language eq \'EN\'';
req.setEndpoint(url);
req.setMethod('POST');
HttpResponse res = new Http().send(req);
System.Debug(res);

Which gave me this in the log:

07:36:02.44 (238032455)|USER_DEBUG|[7]|DEBUG|System.HttpResponse[Status=Bad Request, StatusCode=400]

And then modified it to encode the spaces:

HttpRequest req = new HttpRequest();
String productCode = 'bob1234';
String url = 'https://quotes.free.beeceptor.com/v1/product/ProductsSet?$filter=Productdescription eq \'XXXXXX\' and Language eq \'EN\'';
url = url.replaceAll(' ', '%20');
req.setEndpoint(url);
req.setMethod('POST');
HttpResponse res = new Http().send(req);
System.Debug(res);

And once again, this one got sent successfully. If SAP won't accept the URL with encoding then you might have some trickier issues to resolve!