use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/mholt/caddy/caddyhttp/status/setup.go

@@ -0,0 +1,107 @@
+// 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
+}

vendor/github.com/mholt/caddy/caddyhttp/status/status.go

@@ -0,0 +1,73 @@
+// 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 is middleware for returning status code for requests
+package status
+
+import (
+	"net/http"
+
+	"github.com/mholt/caddy/caddyhttp/httpserver"
+)
+
+// Rule describes status rewriting rule
+type Rule struct {
+	// Base path. Request to this path and sub-paths will be answered with StatusCode
+	Base string
+
+	// Status code to return
+	StatusCode int
+
+	// Request matcher
+	httpserver.RequestMatcher
+}
+
+// NewRule creates new Rule.
+func NewRule(basePath string, status int) *Rule {
+	return &Rule{
+		Base:           basePath,
+		StatusCode:     status,
+		RequestMatcher: httpserver.PathMatcher(basePath),
+	}
+}
+
+// BasePath implements httpserver.HandlerConfig interface
+func (rule *Rule) BasePath() string {
+	return rule.Base
+}
+
+// Status is a middleware to return status code for request
+type Status struct {
+	Rules []httpserver.HandlerConfig
+	Next  httpserver.Handler
+}
+
+// ServeHTTP implements the httpserver.Handler interface
+func (status Status) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
+	if cfg := httpserver.ConfigSelector(status.Rules).Select(r); cfg != nil {
+		rule := cfg.(*Rule)
+
+		if rule.StatusCode < 400 {
+			// There's no ability to return response body --
+			// write the response status code in header and signal
+			// to other handlers that response is already handled
+			w.WriteHeader(rule.StatusCode)
+			return 0, nil
+		}
+
+		return rule.StatusCode, nil
+	}
+
+	return status.Next.ServeHTTP(w, r)
+}