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Motivation: An intermediary like a load balancer might require that a Cross Origin Resource Sharing (CORS) preflight request have certain headers set. As a concrete example the Elastic Load Balancer (ELB) requires the 'Date' and 'Content-Length' header to be set or it will fail with a 502 error code. This works is an enhancement of https://github.com/netty/netty/pull/2290 Modifications: CorsConfig has been extended to make additional HTTP response headers configurable for preflight responses. Since some headers, like the 'Date' header need to be generated each time, m0wfo suggested using a Callable. Result: By default, the 'Date' and 'Content-Lenght' headers will be sent in a preflight response. This can be overriden and users can specify any headers that might be required by different intermediaries.
Netty Project
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
Links
How to build
For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.
You require the following to build Netty:
- Latest stable Oracle JDK 7
- Latest stable Apache Maven
Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.
Branches to look
The 'master' branch is where the development of the latest major version lives on. The development of all other major versions takes place in each branch whose name is identical to its major version number. For example, the development of 3.x and 4.x resides in the branch '3' and the branch '4' respectively.