• Matthew Holt's avatar
    Rewrote Caddy from the ground up; initial commit of 0.9 branch · ac4fa2c3
    Matthew Holt authored
    These changes span work from the last ~4 months in an effort to make
    Caddy more extensible, reduce the coupling between its components, and
    lay a more robust foundation of code going forward into 1.0. A bunch of
    new features have been added, too, with even higher future potential.
    
    The most significant design change is an overall inversion of
    dependencies. Instead of the caddy package knowing about the server
    and the notion of middleware and config, the caddy package exposes an
    interface that other components plug into. This does introduce more
    indirection when reading the code, but every piece is very modular and
    pluggable. Even the HTTP server is pluggable.
    
    The caddy package has been moved to the top level, and main has been
    pushed into a subfolder called caddy. The actual logic of the main
    file has been pushed even further into caddy/caddymain/run.go so that
    custom builds of Caddy can be 'go get'able.
    
    The HTTPS logic was surgically separated into two parts to divide the
    TLS-specific code and the HTTPS-specific code. The caddytls package can
    now be used by any type of server that needs TLS, not just HTTP. I also
    added the ability to customize nearly every aspect of TLS at the site
    level rather than all sites sharing the same TLS configuration. Not all
    of this flexibility is exposed in the Caddyfile yet, but it may be in
    the future. Caddy can also generate self-signed certificates in memory
    for the convenience of a developer working on localhost who wants HTTPS.
    And Caddy now supports the DNS challenge, assuming at least one DNS
    provider is plugged in.
    
    Dozens, if not hundreds, of other minor changes swept through the code
    base as I literally started from an empty main function, copying over
    functions or files as needed, then adjusting them to fit in the new
    design. Most tests have been restored and adapted to the new API,
    but more work is needed there.
    
    A lot of what was "impossible" before is now possible, or can be made
    possible with minimal disruption of the code. For example, it's fairly
    easy to make plugins hook into another part of the code via callbacks.
    Plugins can do more than just be directives; we now have plugins that
    customize how the Caddyfile is loaded (useful when you need to get your
    configuration from a remote store).
    
    Site addresses no longer need be just a host and port. They can have a
    path, allowing you to scope a configuration to a specific path. There is
    no inheretance, however; each site configuration is distinct.
    
    Thanks to amazing work by Lucas Clemente, this commit adds experimental
    QUIC support. Turn it on using the -quic flag; your browser may have
    to be configured to enable it.
    
    Almost everything is here, but you will notice that most of the middle-
    ware are missing. After those are transferred over, we'll be ready for
    beta tests.
    
    I'm very excited to get this out. Thanks for everyone's help and
    patience these last few months. I hope you like it!!
    ac4fa2c3
graceful.go 2.06 KB