use go 1.12

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

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

@@ -0,0 +1,172 @@
+// 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 log
+
+import (
+	"net"
+	"strings"
+
+	"github.com/mholt/caddy"
+	"github.com/mholt/caddy/caddyhttp/httpserver"
+)
+
+// setup sets up the logging middleware.
+func setup(c *caddy.Controller) error {
+	rules, err := logParse(c)
+	if err != nil {
+		return err
+	}
+
+	for _, rule := range rules {
+		for _, entry := range rule.Entries {
+			entry.Log.Attach(c)
+		}
+	}
+
+	httpserver.GetConfig(c).AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
+		return Logger{Next: next, Rules: rules, ErrorFunc: httpserver.DefaultErrorFunc}
+	})
+
+	return nil
+}
+
+func logParse(c *caddy.Controller) ([]*Rule, error) {
+	var rules []*Rule
+	var logExceptions []string
+	for c.Next() {
+		args := c.RemainingArgs()
+
+		ip4Mask := net.IPMask(net.ParseIP(DefaultIP4Mask).To4())
+		ip6Mask := net.IPMask(net.ParseIP(DefaultIP6Mask))
+		ipMaskExists := false
+
+		var logRoller *httpserver.LogRoller
+		logRoller = httpserver.DefaultLogRoller()
+
+		for c.NextBlock() {
+			what := c.Val()
+			where := c.RemainingArgs()
+
+			if what == "ipmask" {
+
+				if len(where) == 0 {
+					return nil, c.ArgErr()
+				}
+
+				if where[0] != "" {
+					ip4MaskStr := where[0]
+					ipv4 := net.ParseIP(ip4MaskStr).To4()
+
+					if ipv4 == nil {
+						return nil, c.Err("IPv4 Mask not valid IP Mask Format")
+					} else {
+						ip4Mask = net.IPMask(ipv4)
+						ipMaskExists = true
+					}
+				}
+
+				if len(where) > 1 {
+
+					ip6MaskStr := where[1]
+					ipv6 := net.ParseIP(ip6MaskStr)
+
+					if ipv6 == nil {
+						return nil, c.Err("IPv6 Mask not valid IP Mask Format")
+					} else {
+						ip6Mask = net.IPMask(ipv6)
+						ipMaskExists = true
+					}
+
+				}
+
+			} else if what == "except" {
+
+				for i := 0; i < len(where); i++ {
+					logExceptions = append(logExceptions, where[i])
+				}
+
+			} else if httpserver.IsLogRollerSubdirective(what) {
+
+				if err := httpserver.ParseRoller(logRoller, what, where...); err != nil {
+					return nil, err
+				}
+
+			} else {
+				return nil, c.ArgErr()
+			}
+
+		}
+
+		path := "/"
+		format := DefaultLogFormat
+		output := DefaultLogFilename
+
+		switch len(args) {
+		case 0:
+			// nothing to change
+		case 1:
+			// Only an output file specified
+			output = args[0]
+		case 2, 3:
+			// Path scope, output file, and maybe a format specified
+			path = args[0]
+			output = args[1]
+			if len(args) > 2 {
+				format = strings.Replace(args[2], "{common}", CommonLogFormat, -1)
+				format = strings.Replace(format, "{combined}", CombinedLogFormat, -1)
+			}
+		default:
+			// Maximum number of args in log directive is 3.
+			return nil, c.ArgErr()
+		}
+
+		rules = appendEntry(rules, path, &Entry{
+			Log: &httpserver.Logger{
+				Output:       output,
+				Roller:       logRoller,
+				V4ipMask:     ip4Mask,
+				V6ipMask:     ip6Mask,
+				IPMaskExists: ipMaskExists,
+				Exceptions:   logExceptions,
+			},
+			Format: format,
+		})
+	}
+
+	return rules, nil
+}
+
+func appendEntry(rules []*Rule, pathScope string, entry *Entry) []*Rule {
+	for _, rule := range rules {
+		if rule.PathScope == pathScope {
+			rule.Entries = append(rule.Entries, entry)
+			return rules
+		}
+	}
+
+	rules = append(rules, &Rule{
+		PathScope: pathScope,
+		Entries:   []*Entry{entry},
+	})
+
+	return rules
+}
+
+const (
+	// IP Masks that have no effect on IP Address
+	DefaultIP4Mask = "255.255.255.255"
+
+	DefaultIP6Mask = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
+)