`URIEditor` should not double escape `classpath:` URIs [SPR-16581]

[spring-projects-issues]

Gerhard Bloch opened SPR-16581 and commented

My Tomcat installation has a space character in the path (installation is provided so I cannot change this). I want to configure my EhCache via JCacheManagerFactoryBean, property cacheManagerUri=classpath:ehcache.xml. The resource URL yields something like ...%20... which is the correct encoding of the space character, but then the default URIEncoder (which is "encoding" by default) encodes the percent sign and I end up with a URI like ...%2520... which does not work for obvious reasons. I do not understand why the URIEditor needs to "encode" at all, looks like fixing broken URIs at the wrong place, but at least for the case of classpath: URI's I absolutely do not see a point in applying any additional encoding. The resource gives a valid URL and this is just fine as it is.

I suggest to replace the createURI(url) in URIEditor:110 by a simple new URI(url). Running such patch fixes the issue for me.

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Affects: 4.3.14, 5.0.4

Issue Links:

• URIEditor double escapes % signs for URIs that contain a schema [SPR-6005] #10673
• Unable to inject a URI with a fragment as a bean property value [SPR-7083] #11743

Backported to: 4.3.15

[spring-projects-issues]

Juergen Hoeller commented

Good catch, URIEditor is quite outdated there: For classpath URLs, it should use ClassPathResource.getURI() directly, not even going via getURL().toString() and then parsing the String into a URI instance again. The encoding step is only meant to be applied to user-specified values to begin with, not to system-obtained ones.