Gilles,

When you enter a url with an anchor into a browser, the browser will only request a URL without the anchor from the web server.
The web servers gets only the part you see in logs.
For '/Doc.html#case1' the web server will receive a request for '/Doc.html'. The anchor is used by the browser itself to navigate within a page.

You can't rely on the anchor part to make decisions on the web server side.

AFAIK, the anchors were initially to scroll to a an element with a corresponding ID. Later it was reused by JS frameworks to build navigation within so called single page applications.

This link may help: https://en.wikipedia.org/wiki/Single-page_application#Browser_history (note that it also uses an anchor ;)

To sum it up: there is no solution to the problem you are asking about.
But most likely this is an XY problem: https://en.wikipedia.org/wiki/XY_problem .

Hope this helps,
Igor.

On 13.04.2022 10:41, gperrot wrote:
Thanks a lot for all your answers !

Since I have the case below with anchor (fragment-ID in URL to map to one
specific action in my doc.map :

/Doc.html#case1 https://domain2.com/action1;
/Doc.html#case2 https://domain2.com/action2;
/Doc.html https://domain2.com/action3;

How can I do this kind of mapping with Nginx ?

For the moment, my conf is :
map $uri $new_uri {
     include /etc/nginx/conf/doc.map;
}

If I type https://domain1.com/Doc.html, the map for action3 works but if I
type https://domain1.com/Doc.html#case1 or
https://domain1.com/Doc.html#case2, the map doesn't work.

Any idea how to solve that ?

Thanks in advance for your help.

Gilles

Posted at Nginx Forum: 
https://forum.nginx.org/read.php?2,293930,293948#msg-293948

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