Question

From what I can gather, there are three categories:

1. Never use GET and use POST
2. Never use POST and use GET
3. It doesn’t matter which one you use.

Am I correct in assuming those three cases? If so, what are some examples from each case?

Answer 1

Use POST for destructive actions such as creation (I’m aware of the irony), editing, and deletion, because you can’t hit a POST action in the address bar of your browser. Use GET when it’s safe to allow a person to call an action. So a URL like:

http://myblog.org/admin/posts/delete/357 

Should bring you to a confirmation page, rather than simply deleting the item. It’s far easier to avoid accidents this way.

POST is also more secure than GET, because you aren’t sticking information into a URL. And so using GET as the method for an HTML form that collects a password or other sensitive information is not the best idea.

One final note: POST can transmit a larger amount of information than GET. ‘POST’ has no size restrictions for transmitted data, whilst ‘GET’ is limited to 2048 characters.