feature: MITM

rewrite/parser.go

@@ -0,0 +1,78 @@
+package rewrites
+
+import (
+	"regexp"
+	"strings"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+func ParseRewrite(line string) (C.Rewrite, error) {
+	url, others, found := strings.Cut(strings.TrimSpace(line), "url")
+	if !found {
+		return nil, errInvalid
+	}
+
+	var (
+		urlRegx     *regexp.Regexp
+		ruleType    *C.RewriteType
+		ruleRegx    *regexp.Regexp
+		rulePayload string
+
+		err error
+	)
+
+	urlRegx, err = regexp.Compile(strings.Trim(url, " "))
+	if err != nil {
+		return nil, err
+	}
+
+	others = strings.Trim(others, " ")
+	first := strings.Split(others, " ")[0]
+	for k, v := range C.RewriteTypeMapping {
+		if k == others {
+			ruleType = &v
+			break
+		}
+
+		if k != first {
+			continue
+		}
+
+		rs := trimArr(strings.Split(others, k))
+		l := len(rs)
+		if l > 2 {
+			continue
+		}
+
+		if l == 1 {
+			ruleType = &v
+			rulePayload = rs[0]
+			break
+		} else {
+			ruleRegx, err = regexp.Compile(rs[0])
+			if err != nil {
+				return nil, err
+			}
+
+			ruleType = &v
+			rulePayload = rs[1]
+			break
+		}
+	}
+
+	if ruleType == nil {
+		return nil, errInvalid
+	}
+
+	return NewRewriteRule(urlRegx, *ruleType, ruleRegx, rulePayload), nil
+}
+
+func trimArr(arr []string) (r []string) {
+	for _, e := range arr {
+		if s := strings.Trim(e, " "); s != "" {
+			r = append(r, s)
+		}
+	}
+	return
+}