The gOnline APIs use HTTP response codes to communicate errors. A list of common errors encountered on the platform is listed below. As a general rule of thumb, a 4XX error is an issue on the client-side, and a 5XX is an error on gOnline. This page contains links to troubleshooting Grubtech APIs for errors and other issues that you may encounter when using APIs.

HTTP Status Codes

The Grubtech API attempts to return appropriate HTTP status codes for every request. In addition to descriptive error text, error messages contain machine-parseable codes. While the text for an error message may change, the codes will stay the same. Error codes in particular help in troubleshooting bad requests.

Most REST APIs follow a standard protocol for response headers. For example, 200 isn't just an arbitrary code decided upon by the OpenWeatherMap API developers. 200 is a universally accepted code for a successful HTTP request. (If you change the method, you will get back a different status code.)

HTTP Response Codes

These are general definitions codes and descriptions for response codes.

Success

HTTP Status Code	Definition	Meaning
200	Successful response OK	The server successfully processed the request and is not returning any content
202	Accepted	The request has been accepted for processing, but the processing has not been completed.
204	No Content	The server successfully processed the request, and is not returning any content

Failure

HTTP Status Code	Definition	Meaning
400	Bad request	The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing)
404	Resource not found	The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible
409	Conflict	The request could not be completed due to a conflict with the current state of the resource.
500	Internal server error	A generic error message, given when an unexpected condition was encountered and no more specific message is suitable