[SalesForce] Apex To Azure API App

I am attempting to do a very simple test connection between Salesforce Apex and my Azure API App. I followed the tutorial to create the API App and I can access and use it via the URL just fine.

When I attempt to connect to it from an Apex class, I receive Status=Internal Server Error, StatusCode=500 as the response, with a body of:

{
    "status": 500,
    "source": "https://default-web-....azurewebsites.net/api/ContactsList,
    "message": "The format of value '*; q=.2, */*; q=.2' is invalid."
}

This is the code of the class:

public class APITest {
public static void Attempt(){
    HttpRequest req = new HttpRequest();
    Http http = new Http();

    req.setMethod('GET');
    req.setEndpoint('https://microsoft-apiapp....azurewebsites.net:443/api/ContactsList');

    HTTPResponse resp = http.send(req);
    System.debug(LoggingLevel.INFO, resp.getBody());
}}

I have the https://microsoft-apiapp….azurewebsites.net set up in Remote Site settings.

Is there anything I'm missing? My goal is to get an XML response from the API. Any help would be appreciated!

Thanks!

Best Answer

Q values have to do with the service negotiation headers (the Accept and Accept-* headers). Microsoft Azure is stating that an Accept header was provided:

Accept: *; q=.2, */*; q=.2

And that this value wasn't valid. As your code snippet doesn't include that, I can imagine that Salesforce is providing some default value, and that default value isn't something Azure likes (note: the specs give examples like q=0.2, suggesting that the integral portion of the q factor should be present).

You can try explicitly setting a value:

req.setHeader('Accept', '*/*; q=1');

I'm not sure if that will fix the problem, but that's the best suggestion I have for you at this moment.

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