How are “304 Not Modified” responses generated? How does a browser determine whether the response to an HTTP request is 304? Is it set by the browser or sent from the server? If sent by the server, how does the server know the data available in cache, also how does it set 304 to an … Read more
Given that the TCP connection is already established when the HTTP request is sent, the IP address and port are implicitly known — a TCP connection is an IP + Port. So, why do we need the Host header? Is this only needed for the case where there are multiple hosts mapped to the IP … Read more
For my authentication process I create a unique token when a user logs in and put that into a cookie which is used for authentication. So I would send something like this from the server: Set-Cookie: token=$2a$12$T94df7ArHkpkX7RGYndcq.fKU.oRlkVLOkCBNrMilaSWnTcWtCfJC; path=/; Which works on all browsers. Then to delete a cookie I send a similar cookie with the … Read more
I’m wondering whether to use matrix or query parameters in my URLs. I found an older discussion to that topic not satisfying. Examples URL with query params: http://some.where/thing?paramA=1¶mB=6542 URL with matrix params: http://some.where/thing;paramA=1;paramB=6542 At first sight matrix params seem to have only advantages: more readable no encoding and decoding of “&” in XML documents is … Read more
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 years ago. This post was edited and submitted for review 6 days ago and failed to reopen the post: Original close … Read more
I read about Pragma header on Wikipedia which says: “The Pragma: no-cache header field is an HTTP/1.0 header intended for use in requests. It is a means for the browser to tell the server and any intermediate caches that it wants a fresh version of the resource, not for the server to tell the browser … Read more
As far as I understood there are two places where to set the content type: The client sets a content type for the body he is sending to the server (e.g. for post) The server sets a content type for the response. Does this mean I don’t have to or should not set a content … Read more
DELETE is supposed to be idempotent. If I DELETE http://example.com/account/123 it’s going to delete the account. If I do it again would I expect a 404, since the account no longer exists? What if I attempt to DELETE an account that has never existed? 8 Answers 8
HTTP has HTTP Cookies. Cookies allow the server to track the user state, the number of connections, last connection, etc. HTTP has persistent connections (Keep-Alive) where several requests can be sent from the same TCP Connection. 10 Answers 10
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 What do these ‘q=%f’ mean? 3 Answers 3
