August 2011
Intermediate to advanced
546 pages
20h 53m
English
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HTTP Response Status Codes
When you’re working with web services and the APIs of companies whose data you would like to use, it is important to understand the method these services use to communicate with you—HTTP response status codes.
When issuing requests to these services, you may receive any number of responses back in different address ranges. These codes will help you determine whether there were any major issues, if there was something expected by the service that was not present in the request, or if everything was sent and processed successfully.
In the response structure that a service sends back, you should be able to extract the HTTP response, which generally comprises the response code and a description that explains it.
There is a vast number of possible response codes, but the address ranges that will be returned will allow you to pinpoint any issues or decide whether you can process the response as a success case. These ranges include:
- 1xx range
The request has been received and processing is in progress.
- 2xx range
The request has been received, understood, accepted, and processed successfully.
- 3xx range
The request has been received, but the client needs to take additional actions to complete the request.
- 4xx range
There was an error in the request sent by the client. The response from the server should indicate the specific issue encountered.
- 5xx range
The request was received and appears to be valid, but an error occurred while the server was attempting to process it.
Understanding ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.