Keyword condition

A keyword condition matches if the URL protocol is HTTP, and the pattern is an exact sub-string of the URL. (It behaves like the URL wildcard pattern http://*pattern*, where pattern is the keyword pattern.)

Keyword conditions are useful if you want to avoid connection resets by the GFW, by requesting URLs that contain certain keywords through a proxy.

Example

Pattern: example.com

Matching: http://www.example.com, http://search.test/?q=example.com

Not matching: https://www.example.com, https://search.test/?q=example.com

Design goals

Keyword conditions are expected to be used very very frequently in China, for China is a country of china [citation needed]. They can be the largest part of a switch profile or a rule list profile.

Luckily, they are easy to optimize. First, see whether the protocol is HTTP. Then, check whether the keyword is a substring of the URL.