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// Copyright 2015 Light Code Labs, LLC
//
// 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 status
import (
"strconv"
"github.com/mholt/caddy"
"github.com/mholt/caddy/caddyhttp/httpserver"
)
// init registers Status plugin
func init() {
caddy.RegisterPlugin("status", caddy.Plugin{
ServerType: "http",
Action: setup,
})
}
// setup configures new Status middleware instance.
func setup(c *caddy.Controller) error {
rules, err := statusParse(c)
if err != nil {
return err
}
cfg := httpserver.GetConfig(c)
mid := func(next httpserver.Handler) httpserver.Handler {
return Status{Rules: rules, Next: next}
}
cfg.AddMiddleware(mid)
return nil
}
// statusParse parses status directive
func statusParse(c *caddy.Controller) ([]httpserver.HandlerConfig, error) {
var rules []httpserver.HandlerConfig
for c.Next() {
hadBlock := false
args := c.RemainingArgs()
switch len(args) {
case 1:
status, err := strconv.Atoi(args[0])
if err != nil {
return rules, c.Errf("Expecting a numeric status code, got '%s'", args[0])
}
for c.NextBlock() {
hadBlock = true
basePath := c.Val()
for _, cfg := range rules {
rule := cfg.(*Rule)
if rule.Base == basePath {
return rules, c.Errf("Duplicate path: '%s'", basePath)
}
}
rule := NewRule(basePath, status)
rules = append(rules, rule)
if c.NextArg() {
return rules, c.ArgErr()
}
}
if !hadBlock {
return rules, c.ArgErr()
}
case 2:
status, err := strconv.Atoi(args[0])
if err != nil {
return rules, c.Errf("Expecting a numeric status code, got '%s'", args[0])
}
basePath := args[1]
for _, cfg := range rules {
rule := cfg.(*Rule)
if rule.Base == basePath {
return rules, c.Errf("Duplicate path: '%s'", basePath)
}
}
rule := NewRule(basePath, status)
rules = append(rules, rule)
default:
return rules, c.ArgErr()
}
}
return rules, nil
}
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