1.4.5.2

EdgeCommon/pkg/serverconfigs/shared/url_pattern.go

@@ -0,0 +1,109 @@
+// Copyright 2023 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package shared
+
+import (
+	"fmt"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+type URLPatternType = string
+
+const (
+	URLPatternTypeWildcard URLPatternType = "wildcard" // 通配符
+	URLPatternTypeRegexp   URLPatternType = "regexp"   // 正则表达式
+	URLPatternTypeImages   URLPatternType = "images"   // 常见图片
+	URLPatternTypeAudios   URLPatternType = "audios"   // 常见音频
+	URLPatternTypeVideos   URLPatternType = "videos"   // 常见视频
+)
+
+var commonImageExtensions = []string{".apng", ".avif", ".gif", ".jpg", ".jpeg", ".jfif", ".pjpeg", ".pjp", ".png", ".svg", ".webp", ".bmp", ".ico", ".cur", ".tif", ".tiff"}
+var commonAudioExtensions = []string{".mp3", ".flac", ".wav", ".aac", ".ogg", ".m4a", ".wma", ".m3u8"} // m3u8 is special
+var commonVideoExtensions = []string{".mp4", ".avi", ".mkv", ".mov", ".wmv", ".mpeg", ".3gp", ".webm", ".ts", ".m3u8"}
+
+type URLPattern struct {
+	Type    URLPatternType `yaml:"type" json:"type"`
+	Pattern string         `yaml:"pattern" json:"pattern"`
+
+	reg *regexp.Regexp
+}
+
+func (this *URLPattern) Init() error {
+	switch this.Type {
+	case URLPatternTypeWildcard:
+		if len(this.Pattern) > 0 {
+			// 只支持星号
+			var pieces = strings.Split(this.Pattern, "*")
+			for index, piece := range pieces {
+				pieces[index] = regexp.QuoteMeta(piece)
+			}
+			var pattern = strings.Join(pieces, "(.*)")
+			if len(pattern) > 0 && pattern[0] == '/' {
+				pattern = "(http|https)://[\\w.-]+" + pattern
+			}
+			reg, err := regexp.Compile("(?i)" /** 大小写不敏感 **/ + "^" + pattern + "$")
+			if err != nil {
+				return err
+			}
+			this.reg = reg
+		}
+	case URLPatternTypeRegexp:
+		if len(this.Pattern) > 0 {
+			var pattern = this.Pattern
+			if !strings.HasPrefix(pattern, "(?i)") { // 大小写不敏感
+				pattern = "(?i)" + pattern
+			}
+			reg, err := regexp.Compile(pattern)
+			if err != nil {
+				return fmt.Errorf("compile '%s' failed: %w", pattern, err)
+			}
+			this.reg = reg
+		}
+	}
+
+	return nil
+}
+
+func (this *URLPattern) Match(url string) bool {
+	if len(this.Pattern) == 0 && len(url) == 0 {
+		return true
+	}
+
+	switch this.Type {
+	case URLPatternTypeImages:
+		var urlExt = strings.ToLower(filepath.Ext(url))
+		if len(urlExt) > 0 {
+			for _, ext := range commonImageExtensions {
+				if ext == urlExt {
+					return true
+				}
+			}
+		}
+	case URLPatternTypeAudios:
+		var urlExt = strings.ToLower(filepath.Ext(url))
+		if len(urlExt) > 0 {
+			for _, ext := range commonAudioExtensions {
+				if ext == urlExt {
+					return true
+				}
+			}
+		}
+	case URLPatternTypeVideos:
+		var urlExt = strings.ToLower(filepath.Ext(url))
+		if len(urlExt) > 0 {
+			for _, ext := range commonVideoExtensions {
+				if ext == urlExt {
+					return true
+				}
+			}
+		}
+	default:
+		if this.reg != nil {
+			return this.reg.MatchString(url)
+		}
+	}
+
+	return false
+}