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VMOD_HEADER(3) VMOD_HEADER(3)

vmod_header - Header VMOD for Varnish

import header [from "path"] ;

Varnish Module for manipulation of duplicated HTTP headers, for instance multiple Set-Cookie headers.
Example:
vcl 4.0;
import header;
backend default { .host = "192.0.2.11"; .port = "8080"; }
sub vcl_backend_response { if (beresp.http.Set-Cookie) { # Add another line of Set-Cookie in the response. header.append(beresp.http.Set-Cookie, "VSESS=abbabeef");
# CMS always set this, but doesn't really need it. header.remove(beresp.http.Set-Cookie, "JSESSIONID="); } }


VOID append(HEADER, STRING_LIST)
VOID copy(HEADER, HEADER)
STRING get(PRIV_CALL, HEADER, STRING)
VOID remove(PRIV_CALL, HEADER, STRING)

Prototype
VOID append(HEADER, STRING_LIST)
Description
Append an extra occurrence to an existing header.
Example
:: header.append(beresp.http.Set-Cookie, "foo=bar")

Prototype
VOID copy(HEADER, HEADER)
Description
Copy all source headers to a new header.
Example
:: header.copy(beresp.http.set-cookie, beresp.http.x-old-cookie);

Prototype
STRING get(PRIV_CALL, HEADER header, STRING regex)
Description
Fetches the value of the first header that matches the given regular expression regex.
Example
:: set beresp.http.xusr = header.get(beresp.http.set-cookie,"user=");

Prototype
VOID remove(PRIV_CALL, HEADER header, STRING regex)
Description
Remove all occurences of header that matches regex.
Example
:: header.remove(beresp.http.set-cookie,"^(?!(funcookie=))");

The development of this plugin was made possible by the sponsorship of Softonic, http://en.softonic.com/ .
Also thanks to Imo Klabun and Anders Nordby for bug reports.

You can't use dynamic regular expressions, which also holds true for normal regular expressions in regsub().

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