Is there a JS API to get information about headers that were sent?
12740
Accessing the web page's HTTP Headers in JavaScript
17587
Cannot modify header information - headers already sent by... WordPress Issue
109793
Logging Clientside JavaScript Errors on Server
18497
How to find out who called a method?
89665
PHP: Check who had read sent email?
137666
Can I change the headers of the HTTP request sent by the browser?
158098
Can PHP cURL retrieve response headers AND body in a single request?
70730
Is there any way to see how much data I sent via Internet?
98835
Best Way to View Generated Source of Webpage?
54065
Is there any kind of API which allows to get the profile information?
147448
How to write javascript in client side to receive and parse `chunked` response in time?
42756
Using telnet to get website header
115208
Client-side detection of HTTP request method
4495
How can I get a list of all enqueued scripts and styles?
112762
How to access plain text content retrieved via  in JavaScript?
135645
Replacement for drupal_add_http_header()
33145
HTTP packet reconstruction