In the Hypertext Transfer Protocol (HTTP), HTTP header fields contain the operating parameters of an HTTP request or response. With the request or response line (first line of message), they form the message header.
1
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2answers
32 views
Is no cache meta tag bad for performance?
I see many websites, seemingly arbitrarily adding the no cache meta tag on every page.
Like this:
<META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE">
<META HTTP-EQUIV="CACHE-CONTROL" ...
4
votes
0answers
47 views
How do Expires headers and cache manifest rules work together?
I find the W3C's official Offline Web Applications specification to be rather vague about how the cache manifest interacts with headers such as ETag, Expires, or Pragma on cached assets. I know that ...
4
votes
1answer
69 views
HTTP Headers caching
I am not totally sure bout HTTP headers, but from what I read its good to have some level of caching on static pages also I am not sure if Transfer Encoding: chunked is a good thing. I was not finding ...
2
votes
1answer
74 views
What's the best HTTP code for dynamically deleted pages?
I've built my own CMS and I'm looking for the best way to handle pages / items deletion.
Actually, pages and items were deleted and cannot be restored.
But since I have implemented a bin, I don't ...
1
vote
1answer
48 views
How to configure apache2 to just save certain POST requests without even passing them to application?
I'm running Apache in front of glassfish server using BalancerMember.
For performance reasons I would like that POST requests on certain endpoint are just saved to a file without passing them to ...
2
votes
1answer
53 views
Why was 303 skipped in HTTP/1.0?
While looking back over HTTP response codes today I noticed that the 301, 302, and 304 response codes were defined in HTTP/1.0 but not the 303 response code. Does anyone know why the number 303 was ...
6
votes
1answer
106 views
Does the SPDY protocol eliminate the need for cookieless domains?
With plain HTTP, cookieless domains are an optimization to avoid unnecessarily sending cookie headers for page resources.
However, the SPDY protocol compresses HTTP headers and in some cases ...
1
vote
1answer
557 views
Google Chrome audit: resources are explicitly non-cacheable?
If I run a Google Chrome audit on a site, it lists all CSS, PNG, JPG, JS files and even the main domain (i.e. www.example.com) under the heading:
Leverage browser caching
The following resources ...
5
votes
3answers
321 views
How to tell the Browser the character encoding of a HTML website regardless of Server Content-Type Header?
I have a HTML page that correctly (the encoding of the physical on disk matches it) announces it's Content-Type:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
...
0
votes
0answers
66 views
Google crawler not found an error inside of the <head> tag
I've found a crawler error in my site and it is listed as a page not found(404) link.
Heres the broken link http://mydomain.com/blog/comments/feed/
I'm using Google web master tools and found that ...
0
votes
2answers
236 views
How to extract AdWords keywords from incoming traffic?
I have a landing page in which I need to understand what keywords are coming in from AdWords and then display some information based on this. I am not certain, but I don't believe that this ...
5
votes
3answers
253 views
What does it mean when a User-Agent has another User-Agent inside it?
Basically, sometimes the user-agent will have its normal user-agent displayed, then at the end it will have teh "User-Agent: " tag displayed, and right after it another user-agent is shown. Sometimes, ...
4
votes
1answer
889 views
HTTP Header Cache Time: s-maxage and max-age
I am setting up a CDN for my website, I found the following sample for adding to the 'httpd.conf' file, this is used to adjust the cache-time for client and CDN:
ExpiresActive On
ExpiresByType ...
3
votes
3answers
140 views
PHP Include meta tags
A website I'm currently working on is http://www.troubi.com . Please don't care to look at the
source code.
If I validate the website through the w3cValidator a lot of errors occur all due to ...
7
votes
2answers
161 views
What should happen when content is deleted?
I am wondering about the standard handling of deleted data links from an application and an SEO perspective.
I have an application where users can create content but they can also delete content. ...
