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Choose between Get and Post Methods

2502.12hours, 02 minutes ago Visitor: 6053
 The purpose of GET is as its name implies - to GET information. It is intended to be used when you are reading information to display on the page. Browsers will cache the result from a GET request and if the same GET request is made again then they will display the cached result rather than rerunning the entire request. This is not a flaw in the browser processing but is deliberately designed to work that way so as to make GET calls more efficient when the calls are used for their intended purpose. A GET call is retrieving data to display in the page and data is not expected to be changed on the server by such a call and so re-requesting the same data should be expected to obtain the same result.

The POST method is intended to be used where you are updating information on the server. Such a call is expected to make changes to the data stored on the server and the results returned from two identical POST calls may very well be completely different from one another since the initial values before the second POST call will be different from the initial values before the first call because the first call will have updated at least some of those values. A POST call will therefore always obtain the response from the server rather than keeping a cached copy of the prior response.

So rather than choosing between GET and POST based on the amount of data that you are passing in your Ajax call, you should select between them based on what the Ajax call is actually doing. If the call is to retrieve data from the server then use GETS. If the value to be retrieved is expected to vary over time as a result of other processes updating it then add a current time parameter to what you are passing in your GET call so that the later calls will not use an earlier cached copy of the result that is no longer correct. If your call is going to write any data at all to the server then use POST.

In fact you should not only use these criteria for selecting between GET and POST for your Ajax calls. You should use this as the criteria for choosing whether to use GET or POST when processing forms on your web page as well.

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2/12/2018 10:55:27 AM


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