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Age
how many seconds response has been cached
Age: 355
Date
when response was sent
Date: Mon, 09 Sep 2019...
Last-Modified
when content was last modified (not always accurate)
ETag
Version of response body
Etag: "ac5affa.."
Cache-Control
various caching
settings Cache-Control: max-age=300
Vary
request headers that response will vary based on
Via
added by proxy servers
Via: nginx
Expires
The response is stale and should be re-requested after this time.
Connection
“close” or “keep-alive” Whether to keep the TCP connection open
Set-Cookie
Sets a cookie.
Set-Cookie: name=value; HttpOnly
Access-Control-*
Called CORS headers. These allow cross-origin requests.
Content-Type
MIME type of body
Content-Type: text/plain
Content-Length
length of body in bytes
Content-Length: 33
Content-Language
Language of body
Content-Language: en-US
Content-Encoding
Whether body is compressed
Content-Encoding: gzip
Location
URL to redirect to
Location: /cat.png
Accept-Ranges
Whether Range request header is supported for this resource
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