The Google HTTP Client Library for Java is designed to work with any HTTP service on the web, not just with Google APIs. The library has the following features:
- Pluggable HTTP transport abstraction so you can use any low-level library such as
HttpClient, or URL Fetch on Google App Engine.
- Efficient JSON and XML data models for parsing and serialization of HTTP content. The JSON and XML libraries are also fully pluggable, and they include support for Jackson and Android's GSON libraries for JSON.
Features marked with the @Beta annotation at the class or method level are subject to change. They might be modified in any way, or even removed, in any major release. You should not use beta features if your code is a library itself (that is, if your code is used on the CLASSPATH of users outside your own control).
Deprecated non-beta features will be removed eighteen months after the release in which they are first deprecated. You must fix your usages before this time. If you don't, any type of breakage might result, and you are not guaranteed a compilation error.