http - How does "304 Not Modified" work exactly? - Stack Overflow
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 image? My guess, if it's generated by the browser:
http - Why am I getting "(304) Not Modified" error on some links …
Any ideas why on some links that I try to access using HttpWebRequest I am getting "The remote server returned an error: (304) Not Modified." in the code? The code I'm using is from Jeff's post here (the page seems to have disappeared, see an archive copy at the Wayback Machine ).
caching - What is the difference between HTTP status code 200 …
Nov 3, 2009 · The items with code "200 (cache)" were fulfilled directly from your browser cache, meaning that the original requests for the items were returned with headers indicating that the browser could cache them (e.g. future-dated Expires or Cache-Control: max-age headers), and that at the time you triggered the new request, those cached objects were still stored in local …
http - How to prevent request that returns 304 - Stack Overflow
In other words, I have a JavaScript file being served. Its HTTP response header has an ETag, Cache-Control: public, and Expires: Tue, 19 Jan 2038 03:14:07 GMT. The server is returning a 304 after the browser cache has been primed. My question is, why is the browser even checking with the server and getting a 304 in the first place? I don't want ...
rest - Using HTTP 304 in response to POST - Stack Overflow
Nov 18, 2013 · Solution of your problem is HTTP Status 200 OK when something was modified and HTTP Status 204 No Content when there was no modification. According to: According to: The common use case is to return 204 as a result of a PUT request, updating a resource, without changing the current content of the page displayed to the user.
http - Why does the 304 status code count as a "redirect?" - Stack …
May 14, 2014 · I am currently trying to understand how exactly 304/Not modified qualifies for the 3xx-range class of HTTP status codes. RFC 1945, sec. 9.3 and RFC 2616, sec. 10.3 both read: This class of status code indicates that further action needs to be taken by the user agent in order to fulfill the request.
NodeJS/express: Cache and 304 status code - Stack Overflow
Sep 15, 2013 · When I reload a website made with express, I get a blank page with Safari (not with Chrome) because the NodeJS server sends me a 304 status code. How to solve this? Of course, this could also be just a problem of Safari, but actually it works on all other websites fine, so it has to be a problem on my NodeJS server, too.
http - 304 Not Modified with 200 (from cache) - Stack Overflow
Oct 20, 2013 · 304 Modified A 304 Not Modified means that the files have not been modified since the specified version by the "If-Modified-Since", or "If-None-Match". 200 OK This is the response you'll get if an HTTP request works. GET requests will have something relating to the files. A POST request will have something holding the result of the action ...
html - Http 304 & Cache-Control: no-cache - Stack Overflow
Jan 16, 2012 · However, the second call also returns a 304 Not Modified. Where does the server expect the page to serve the data from, given that it's been instructed not to cache the earlier response? Interestingly, I do see the response served in the browser, so the browser appears to have cached the response, despite the no-cache directive.
How to know when to send a 304 Not Modified response
May 8, 2014 · A 304 Not Modified response can result from a GET or HEAD request with either an If-Modified-Since ("IMS") or an If-Not-Match ("INM") header. In order to decide what to do when you receive these headers, imagine that you are handling the GET request without these conditional headers.