♻️ Refactor parsers

parser/shadowsocks.go

@@ -0,0 +1,91 @@
+package parser
+
+import (
+	"net/url"
+	"strings"
+	"sub2clash/constant"
+	"sub2clash/model"
+)
+
+func ParseShadowsocks(proxy string) (model.Proxy, error) {
+	if !strings.HasPrefix(proxy, constant.ShadowsocksPrefix) {
+		return model.Proxy{}, &ParseError{Type: ErrInvalidPrefix, Raw: proxy}
+	}
+
+	proxy = strings.TrimPrefix(proxy, constant.ShadowsocksPrefix)
+	urlParts := strings.SplitN(proxy, "@", 2)
+	if len(urlParts) != 2 {
+		return model.Proxy{}, &ParseError{
+			Type:    ErrInvalidStruct,
+			Message: "missing character '@' in url",
+			Raw:     proxy,
+		}
+	}
+
+	var serverAndPort []string
+	if !strings.Contains(urlParts[0], ":") {
+		decoded, err := DecodeBase64(urlParts[0])
+		if err != nil {
+			return model.Proxy{}, &ParseError{
+				Type:    ErrInvalidStruct,
+				Message: "invalid base64 encoded",
+				Raw:     proxy,
+			}
+		}
+		urlParts[0] = decoded
+	}
+	credentials := strings.SplitN(urlParts[0], ":", 2)
+	if len(credentials) != 2 {
+		return model.Proxy{}, &ParseError{
+			Type:    ErrInvalidStruct,
+			Message: "missing server host or port",
+			Raw:     proxy,
+		}
+	}
+	method, password := credentials[0], credentials[1]
+
+	serverInfo := strings.SplitN(urlParts[1], "#", 2)
+	serverAndPort = strings.SplitN(serverInfo[0], ":", 2)
+	server, portStr := serverAndPort[0], serverAndPort[1]
+	if len(serverInfo) != 2 {
+		return model.Proxy{}, &ParseError{
+			Type:    ErrInvalidStruct,
+			Message: "missing server host or port",
+			Raw:     proxy,
+		}
+	}
+	port, err := ParsePort(portStr)
+	if err != nil {
+		return model.Proxy{}, &ParseError{
+			Type:    ErrInvalidPort,
+			Message: err.Error(),
+			Raw:     proxy,
+		}
+	}
+
+	var remarks string
+	if len(serverInfo) == 2 {
+		unescape, err := url.QueryUnescape(serverInfo[1])
+		if err != nil {
+			return model.Proxy{}, &ParseError{
+				Type:    ErrInvalidStruct,
+				Message: "cannot unescape remarks",
+				Raw:     proxy,
+			}
+		}
+		remarks = strings.TrimSpace(unescape)
+	} else {
+		remarks = strings.TrimSpace(server + ":" + portStr)
+	}
+
+	result := model.Proxy{
+		Type:     "ss",
+		Cipher:   method,
+		Password: password,
+		Server:   server,
+		Port:     port,
+		Name:     remarks,
+	}
+
+	return result, nil
+}