GDI-DE recommends setting CORS headers on the required services instead of using proxies. Hence, the mechanism to request URLs via a proxy is deprecated. For additional information, please check chapter 4.7.1 of the GDI-DE documentation.

Proxy (deprecated)

Various Masterportal functions send XHR requests to other domains, e.g. WMS GetFeatureInfo requests or calls to WFS and CSW services. These are restricted by the same-origin policy implemented in all browsers.

For this reason, the Masterportal requires local proxies on the server it's running on for all services that are requested via XHR from another domain. URLs for such requests are translated to local proxy URLs by default; here all dots (".") in the URL's hostname are replaced with underscores ("_").

Example

Assuming a WMS server's URL is https://geodienste.hamburg.de/HH-WMS-Gruenes-Netz, the Masterportal translates it to /geodienste_hamburg_de/HH-WMS-Gruenes-Netz and uses this local address for its request.

For this purpose a reverse proxy must be set up.

Example for an Apache server

An Apache server proxy for the previous example should hold the following directives:

ProxyPass /geodienste_hamburg_de https://geodienste.hamburg.de
ProxyPassReverse /geodienste_hamburg_de https://geodienste.hamburg.de

These directives belong in the Apache24\conf\httpd.conf file and colloquially translate to

Forward all requests to /geodienste_hamburg_de to https://geodienste-hamburg.de, and return the answer as if from /geodienste_hamburg_de.