Menu
How do I access a page's HTTP response headers via JavaScript?
Related to this question, which was modified to ask about accessing two specific HTTP headers.
Related:
How do I access the HTTP request header fields via JavaScript?
910
You can't access the http headers, but some of the information provided in them is available in the DOM. For example, if you want to see the http referer (sic), use document. referrer.
A Headers object has an associated header list, which is initially empty and consists of zero or more name and value pairs. You can add to this using methods like append() (see Examples.) In all methods of this interface, header names are matched by case-insensitive byte sequence.
View headers with browser development toolsSelect the Network tab. You may need to refresh to view all of the requests made for the page. Select a request to view the corresponding response headers.
It's not possible to read the current headers. You could make another request to the same URL and read its headers, but there is no guarantee that the headers are exactly equal to the current.
Use the following JavaScript code to get all the HTTP headers by performing a get request:
var req = new XMLHttpRequest(); req.open('GET', document.location, false); req.send(null); var headers = req.getAllResponseHeaders().toLowerCase(); alert(headers); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
