mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-23 22:27:38 -05:00
87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package caddyhttp
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"github.com/caddyserver/caddy/v2"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterModule(Subroute{})
|
|
}
|
|
|
|
// Subroute implements a handler that compiles and executes routes.
|
|
// This is useful for a batch of routes that all inherit the same
|
|
// matchers, or for multiple routes that should be treated as a
|
|
// single route.
|
|
//
|
|
// You can also use subroutes to handle errors from its handlers.
|
|
// First the primary routes will be executed, and if they return an
|
|
// error, the errors routes will be executed; in that case, an error
|
|
// is only returned to the entry point at the server if there is an
|
|
// additional error returned from the errors routes.
|
|
type Subroute struct {
|
|
// The primary list of routes to compile and execute.
|
|
Routes RouteList `json:"routes,omitempty"`
|
|
|
|
// If the primary routes return an error, error handling
|
|
// can be promoted to this configuration instead.
|
|
Errors *HTTPErrorConfig `json:"errors,omitempty"`
|
|
}
|
|
|
|
// CaddyModule returns the Caddy module information.
|
|
func (Subroute) CaddyModule() caddy.ModuleInfo {
|
|
return caddy.ModuleInfo{
|
|
ID: "http.handlers.subroute",
|
|
New: func() caddy.Module { return new(Subroute) },
|
|
}
|
|
}
|
|
|
|
// Provision sets up subrouting.
|
|
func (sr *Subroute) Provision(ctx caddy.Context) error {
|
|
if sr.Routes != nil {
|
|
err := sr.Routes.Provision(ctx)
|
|
if err != nil {
|
|
return fmt.Errorf("setting up subroutes: %v", err)
|
|
}
|
|
if sr.Errors != nil {
|
|
err := sr.Errors.Routes.Provision(ctx)
|
|
if err != nil {
|
|
return fmt.Errorf("setting up error subroutes: %v", err)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (sr *Subroute) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error {
|
|
subroute := sr.Routes.Compile(next)
|
|
err := subroute.ServeHTTP(w, r)
|
|
if err != nil && sr.Errors != nil {
|
|
r = sr.Errors.WithError(r, err)
|
|
errRoute := sr.Errors.Routes.Compile(next)
|
|
return errRoute.ServeHTTP(w, r)
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Interface guards
|
|
var (
|
|
_ caddy.Provisioner = (*Subroute)(nil)
|
|
_ MiddlewareHandler = (*Subroute)(nil)
|
|
)
|