# Rewriting multiple values of HTTP Location header **URL:** \ **Category:** Technical Forums\ **Tags:** application-delivery\ **Created:** [January 31, 2022, 1:13pm UTC](https://community.f5.com/t/rewriting-multiple-values-of-http-location-header/69150 "2022-01-31T13:13:06Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Lemaire\_Frédéri](https://avatars.discourse-cdn.com/v4/letter/l/f9ae1b/32.png) [@Lemaire\_Frédéri](https://community.f5.com/u/Lemaire_Fr%C3%A9d%C3%A9ri)\ **Post date:** [January 31, 2022, 1:13pm UTC](https://community.f5.com/t/rewriting-multiple-values-of-http-location-header/69150/1 "2022-01-31T13:13:06Z")
Hello I’m trying to rewrite a HTTP location header in a response  using a list of possible value to be rewrited The response to be rewrited : http://[myorighost:81](http://myhost1:81/test)/SASPortal/jsp/html/portal/portal.js [http://myrewritedhost/analytics/Portal/jsp/](http://myhost1:81/test)html/portal/portal.js So, in the header location, both the host and the path /analytics/portal should be rewrited. How can I test multiple value to be changed? I tried this without success: HTTP::header replace Location [string map -nocase [list “[myorighost:81](http://myhost1:81/test)” “myrewirtedhost” “/analytics/Portal” “/SASPortal/”  “/valuex/” “/valuexrewrited”] [HTTP::header value Location]] Thanks in advance. Regards Frédéric ---
**Author:** ![CA\_Valli](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@CA\_Valli](https://community.f5.com/u/CA_Valli)\ **Post date:** [January 31, 2022, 5:39pm UTC](https://community.f5.com/t/rewriting-multiple-values-of-http-location-header/69150/2 "2022-01-31T17:39:17Z")
Hello Frédéric, do you need a redirect from first URL to second URL? Will the two URLs always be the same or is there a whole subfolder content to be redirected? In first case, in my opinion a LTM policy configured for static redirect will just work fine. In second case, there’s a few ways to do it depending on the requirements. If there’s a big list of URLs to be handled, you might want to work with Data Groups to keep it simple. Configure a string-type DG like this: ```html ltm data-group internal /Common/datagroup_path_rewrite { records { /oldsubfolder1/ { } /oldsubfolder2/ { } /oldsubfolder3/ { } /oldsubfolder4/ { } /oldsubfolder5/ { } } type string } ``` Then use it in an iRule for path replacement ```html when HTTP_REQUEST { if {[string tolower [HTTP::host]] eq "myorighost:81" } { HTTP::header replace Host "myrewritedhost" # this is not a redirect } # read as: does the uri contain an element of datagroup_path_rewrite (case sensitive) if {[class match [HTTP::uri] contains datagroup_path_rewrite]} { HTTP::path /analytics/Portal/jsp/html/portal/portal.js # this rewrites the URI path before senting traffic to BE server } } ``` Also, I’ve recently answered a similar question in [this thread](https://community.f5.com/post/226134#M209828), see if this helps as well. ---
**Author:** ![Lemaire\_Frédéri](https://avatars.discourse-cdn.com/v4/letter/l/f9ae1b/32.png) [@Lemaire\_Frédéri](https://community.f5.com/u/Lemaire_Fr%C3%A9d%C3%A9ri)\ **Post date:** [January 31, 2022, 8:51pm UTC](https://community.f5.com/t/rewriting-multiple-values-of-http-location-header/69150/3 "2022-01-31T20:51:06Z")
Hello, Thanks for your answer. In fact, I need to replace a reverse proxy with the F5, currently with LTM. The problem I’m having is the rewriting of the RESPONSE and specifically the Location Header. For the HTTP request rewriting  I was able to rewrite it with “internalhost” and internal uri/path to the back-end webserver. The problem I’m having in the Response redirects coming from the back-end that I need to rewrite with external host + adapt some path and query params ( within the same redirect location ) How can I do that ? for exemple : Http location received from the back-end that need to be rewrited to [http://internalhost/SASPortal/public http://ExternalHost/analytics/Portal/public](http://ExternalHost/analytics/Portal/public) [http://internalhost/SASPortal/test?myparam=http%3ASASPortal…](http://ExternalHost/analytics/Portal/public)  [http://internalhost/SASPortal/test?myparam=http%3%2F%2Fanalytics%2FPortal…](http://ExternalHost/analytics/Portal/public) [http://internalhost/SASTheme/mytheme http://ExternalHost/](http://ExternalHost/analytics/Portal/public)[Theme\_extranal/mytheme](http://ExternalHost/analytics/Portal/public) I also need to rewrite the referer with the external uri and some relative path in the location For the Content rewriting of the response, I 'm using a stream profile and this is ok . But I’m having a lot of problems with the rewriting of the Location header. many thanks in advance for your future answers. Regards Frédéric ---
**Author:** ![Enes\_Afsin\_Al](https://d1p9zq3aats0t8.cloudfront.net/user_avatar/community.f5.com/enes_afsin_al/32/15359_2.png) [@Enes\_Afsin\_Al](https://community.f5.com/u/Enes_Afsin_Al)\ **Post date:** [January 31, 2022, 11:15pm UTC](https://community.f5.com/t/rewriting-multiple-values-of-http-location-header/69150/4 "2022-01-31T23:15:04Z")
Hi Frédéric, Can you add default stream profile to vs and try this iRule? ```tcl when HTTP_REQUEST { STREAM::disable if { [HTTP::host] eq "externalhost" } { HTTP::host "internalhost" switch -glob [HTTP::uri] { "/analytics/Portal*" { HTTP::uri [string map {"/analytics/Portal" "/SASPortal"} [HTTP::uri]] } "/Theme_extranal*" { HTTP::uri [string map {"/Theme_extranal" "/SASTheme"} [HTTP::uri]] } } } } when HTTP_RESPONSE { if { [HTTP::header exists "Location"] } { HTTP::header replace Location [string map [list "internalhost" "externalhost" "/SASPortal" "/analytics/Portal" "/SASTheme" "/Theme_extranal" "/valuefrominternal/" "/valuetoexternal/"] [URI::decode [HTTP::header Location]]] } STREAM::expression {@internalhost@externalhost@} STREAM::enable } ```