XMLHttpRequest Failing to Retrieve Data - Error Code 202

Currently, I am immersed in a project that involves using a webservice (specifically, VB.Net and Javascript). While debugging the code, I encountered an issue with the XmlHttpRequest.status returning as 202. Upon comparison with my previous webservice project, I noticed that the XmlHttpRequest.status had previously returned as 200 and the functionality was working perfectly.

Curious about the status 202, I delved into some online research and came across information on this specific status which can be found at this link.

The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon, as it might be disallowed when processing actually takes place.

If anyone could lend a hand with this issue, I would greatly appreciate it.

Thanks

javascriptjsonvb.netweb-servicesxmlhttprequest

Answer №1

When it comes to the response codes of a service, whether it returns 200 or 202 is determined by how the service has been structured. While both indicate success, there is a slight difference in their implications: 200 signifies that your request was executed and completed successfully; on the other hand, 202 indicates that your request has been accepted for processing at a later time, with the final outcome still pending. Essentially, your request has been placed in a server queue.

If a web service is configured to return a 202 response for a specific API method, it is likely to have a separate method available for checking the status of the original request. Referencing the documentation of the particular web service (if available) or reaching out to the service developer can provide insights into the existence of such a status-checking method and instructions on how to utilize it.

In terms of handling a 202 response within your code, treat it as an indicator of "provisional success." Proceed under the assumption that everything is progressing smoothly unless subsequent status checks suggest otherwise. If a status-checking method exists, schedule a timer to trigger its execution at a later point to gather updates and adjust your actions accordingly. In cases where no status verification option is provided, rely on the presumption that all processes will conclude successfully and continue onwards.

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