Sling breaks the request URI into four parts: the path itself, optional dot-separated selectors and extension that follow it, and an optional path suffix.

Decomposition of a Request URL

1. content path - The longest substring of the request URI resolving to a org.apache.sling.api.resource.Resource object such that the content path is either the complete request URI or the next character in the request URI after the content path is either a dot (.) or a slash (/).
2. selectors - If the first character in the request URI after the content path is a dot, the string after the dot upto but not including the last dot before the next slash character or the end of the request URI. If the content path spans the complete request URI or if a slash follows the content path in the request, then no seletors exist. If only one dot follows the content path before the end of the request URI or the next slash, no selectors exist. The selectors are available as a single string and as an array of strings, which is the selector string splitted on dots.
3. extension - The string after the last dot after the content path in the request uri but before the end of the request uri or the next slash after the content path in the request uri. If the content path spans the complete request URI or a slash follows the content path in the request URI, the extension is empty.
4. suffix path - If the request URI contains a slash character after the content path and optional selectors and extension, the path starting with the slash upto the end of the request URI is the suffix path.

Examples:

URI	Content Path	Selectors	Extension	Suffix
/a/b	/a/b	null	null	null
/a/b.html	/a/b	null	html	null
/a/b.s1.html	/a/b	s1	html	null
/a/b.s1.s2.html	/a/b	s1.s2	html	null
/a/b/c/d	/a/b	null	null	/c/d
/a/b.html/c/d	/a/b	null	html	/c/d
/a/b.s1.html/c/d	/a/b	s1	html	/c/d
/a/b.s1.s2.html/c/d	/a/b	s1.s2	html	/c/d
/a/b/c/d.s.txt	/a/b	null	null	/c/d.s.txt
/a/b.html/c/d.s.txt	/a/b	null	html	/c/d.s.txt
/a/b.s1.html/c/d.s.txt	/a/b	s1	html	/c/d.s.txt
/a/b.s1.s2.html/c/d.s.txt	/a/b	s1.s2	html	/c/d.s.txt

Return the "resource path" part of the URL, what comes before selectors, extension and suffix. This string is part of the request URL and need not be equal to the org.apache.sling.api.resource.Resource.getPath(). Rather it is equal to the resolution path metadata property of the resource.

Returns the extension from the URL or null if the request URL does not contain an extension.

Decomposition of the request URL is defined in the Decomposition of a Request URL above.

Returns the selectors decoded from the request URL as string. Returns null if the request has no selectors.

Decomposition of the request URL is defined in the Decomposition of a Request URL above.

Returns the selectors decoded from the request URL as an array of strings. This array is derived from the selector string by splitting the string on dots. Returns an empty array if the request has no selectors.

Decomposition of the request URL is defined in the Decomposition of a Request URL above.

Returns the suffix part of the URL or null if the request URL does not contain a suffix.

Decomposition of the request URL is defined in the Decomposition of a Request URL above.