Parse SS URL with much cleaner URL struct methods

ShadowsocksX-NG/Utils.h

@@ -11,6 +11,4 @@
 
 void ScanQRCodeOnScreen();
 
-NSDictionary<NSString *, id>* ParseSSURL(NSURL* url);
-
 #endif /* QRCodeUtils_h */

ShadowsocksX-NG/Utils.m

@@ -71,63 +71,3 @@ void ScanQRCodeOnScreen() {
                  }
      ];
 }
-
-// 解析SS URL，如果成功则返回一个与ServerProfile类兼容的dict
-NSDictionary<NSString *, id>* ParseSSURL(NSURL* url) {
-    if (!url.host) {
-        return nil;
-    }
-    
-    NSString *urlString = [url absoluteString];
-    int i = 0;
-    NSString *errorReason = nil;
-    while(i < 2) {
-        if (i == 1) {
-            NSString* host = url.host;
-            if ([host length]%4!=0) {
-                int n = 4 - [host length]%4;
-                if (1==n) {
-                    host = [host stringByAppendingString:@"="];
-                } else if (2==n) {
-                    host = [host stringByAppendingString:@"=="];
-                }
-            }
-            NSData *data = [[NSData alloc] initWithBase64EncodedString:host options:0];
-            NSString *decodedString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
-            urlString = decodedString;
-        }
-        i++;
-        urlString = [urlString stringByReplacingOccurrencesOfString:@"ss://" withString:@"" options:NSAnchoredSearch range:NSMakeRange(0, urlString.length)];
-        NSRange firstColonRange = [urlString rangeOfString:@":"];
-        NSRange lastColonRange = [urlString rangeOfString:@":" options:NSBackwardsSearch];
-        NSRange lastAtRange = [urlString rangeOfString:@"@" options:NSBackwardsSearch];
-        if (firstColonRange.length == 0) {
-            errorReason = @"colon not found";
-            continue;
-        }
-        if (firstColonRange.location == lastColonRange.location) {
-            errorReason = @"only one colon";
-            continue;
-        }
-        if (lastAtRange.length == 0) {
-            errorReason = @"at not found";
-            continue;
-        }
-        if (!((firstColonRange.location < lastAtRange.location) && (lastAtRange.location < lastColonRange.location))) {
-            errorReason = @"wrong position";
-            continue;
-        }
-        NSString *method = [urlString substringWithRange:NSMakeRange(0, firstColonRange.location)];
-        NSString *password = [urlString substringWithRange:NSMakeRange(firstColonRange.location + 1, lastAtRange.location - firstColonRange.location - 1)];
-        NSString *IP = [urlString substringWithRange:NSMakeRange(lastAtRange.location + 1, lastColonRange.location - lastAtRange.location - 1)];
-        NSString *port = [urlString substringWithRange:NSMakeRange(lastColonRange.location + 1, urlString.length - lastColonRange.location - 1)];
-        
-        
-        return @{@"ServerHost": IP,
-                 @"ServerPort": @([port integerValue]),
-                 @"Method": method,
-                 @"Password": password,
-                 };
-    }
-    return nil;
-}

ShadowsocksX-NG/Utils.swift

@@ -8,14 +8,12 @@
 
 import Foundation
 
-
 extension String {
     var localized: String {
         return NSLocalizedString(self, tableName: nil, bundle: Bundle.main, value: "", comment: "")
     }
 }
 
-
 extension Data {
     func sha1() -> String {
         let data = self
@@ -25,3 +23,36 @@ extension Data {
         return hexBytes.joined(separator: "")
     }
 }
+
+func ParseSSURL(_ url: URL?) -> [String: Any?]? {
+
+    func padBase64(string: String) -> String {
+        var length = string.characters.count
+        length = 4 - length % 4 + length
+        return string.padding(toLength: length, withPad: "=", startingAt: 0)
+    }
+
+    if url?.host == nil {
+        return nil
+    }
+
+    var plainUrl: URL! = url
+
+    let data = Data(base64Encoded: padBase64(string: url!.host!),
+                    options: Data.Base64DecodingOptions())
+
+    if data != nil {
+        let decoded = String(data: data!, encoding: String.Encoding.utf8)
+        plainUrl = URL(string: "ss://\(decoded!)")
+
+        if plainUrl == nil {
+            return nil
+        }
+    }
+
+    return ["ServerHost": plainUrl.host,
+            "ServerPort": UInt16(plainUrl.port!),
+            "Method": plainUrl.user,
+            "Password": plainUrl.password,
+    ]
+}