Safe (HTTP Methods): POST with certain MIME types?

Question

for HTTP request methods that can cause side-effects on server data (in particular, HTTP methods other than GET, or POST with certain MIME types), the specification mandates that browsers "preflight" the request

I concluded that there are "Safe HTTP POST Methods (with certain MIME types)" based on the above statement.

Am I right? And if so, what are these MIME types?

SinaMobasheri · Accepted Answer · 2024-07-25 21:08:59Z

1

After some research, I came to the conclusion that my understanding of the above quote is wrong. The sentence in parentheses, a quote from MDN, is not about the side effects of the request method, but rather about the request method being eligible for a preflight request (The sentence is a bit ambiguous, I'm not a native speaker).

The above sentence tries to state that preflight requests are not sent for GET requests and POST requests that include headers with a specific Content-Type.

Although this is no longer a question but a misunderstanding correction, I will not remove this question.

answered Jul 25, 2024 at 21:08

SinaMobasheri

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1 Comment

Evert Over a year ago

You are correct. I think it's interesting enough question and answer to not close though so feel free to accept your own answer!

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