: Umlaut URLs fail in Tomcat when accessed via isapi_redirect I have some PDF Documents in my Servlet that contain ä,ö,ü,ß, etc. On accessing the documents like this http://hostname:8080/ServletName/test_ä.txt

@Jessie594

Posted in: #Tomcat #UrlEncoding

I have some PDF Documents in my Servlet that contain ä,ö,ü,ß, etc.
On accessing the documents like this hostname:8080/ServletName/test_ä.txt the tomcat initially responded with an 404.
After changing the tomcat server.xml from this

<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" tomcatAuthentication="false"/>


to this

<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" tomcatAuthentication="false" URIEncoding="UTF-8"/>


I was able to access the documents.

My Problem starts when I want to get the documents via IIS (isapi_redirect).
When I call hostname/ServletName/test_ä.txt the Tomcat allways returns 404.
(Documents without umlaut are served correctly)

The corresponding lines in the tomcat access log look like this:

IP... - - [date...] "GET /ServletName/test_%C3%A4.txt HTTP/1.1" 200 6
IP... - - [date...] "GET /favicon.ico HTTP/1.1" 200 21630
IP... - - [date...] "GET /ServletName/test_%C3%A4.txt HTTP/1.1" 404 1001


The first two lines result from accessing the documents directly (http://hostname:8080/...).
The last line results from accessing trough IIS and isapi_redirect.

I dont understand why the call from the isapi_redirect is treated diffenrently by tomcat despite beeing the exact same URL (from the tomcat point of view).

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