Adds SIP002 URL for QR scaner

ShadowsocksX-NG/ServerProfile.swift

@@ -65,17 +65,40 @@ class ServerProfile: NSObject, NSCopying {
             return nil
         }
         guard let host = parsedUrl.host, let port = parsedUrl.port,
-            let method = parsedUrl.user, let password = parsedUrl.password else {
+            let user = parsedUrl.user else {
             return nil
         }
 
         self.serverHost = host
         self.serverPort = UInt16(port)
-        self.method = method.lowercased()
-        self.password = password
 
+        // This can be overriden by the fragment part of SIP002 URL
         remark = parsedUrl.queryItems?
             .filter({ $0.name == "Remark" }).first?.value ?? ""
+
+        if let password = parsedUrl.password {
+            self.method = user.lowercased()
+            self.password = password
+        } else {
+            // SIP002 URL have no password section
+            guard let data = Data(base64Encoded: padBase64(string: user)),
+                let userInfo = String(data: data, encoding: .utf8) else {
+                return nil
+            }
+
+            let parts = userInfo.characters.split(separator: ":", maxSplits: 1, omittingEmptySubsequences: false)
+            if parts.count != 2 {
+                return nil
+            }
+            self.method = String(parts[0]).lowercased()
+            self.password = String(parts[1])
+
+            // SIP002 defines where to put the profile name
+            if let profileName = parsedUrl.fragment {
+                self.remark = profileName
+            }
+        }
+
         if let otaStr = parsedUrl.queryItems?
             .filter({ $0.name == "OTA" }).first?.value {
             ota = NSString(string: otaStr).boolValue

ShadowsocksX-NGTests/ServerProfileTests.swift

@@ -135,6 +135,40 @@ class ServerProfileTests: XCTestCase {
         XCTAssertNil(profile)
     }
 
+    func testInitWithSIP002URL() {
+        // "ss://aes-256-cfb:password@example.com:8388?Remark=Prism&OTA=true"
+        let url = URL(string: "ss://YWVzLTI1Ni1jZmI6cGFzc3dvcmQ=@example.com:8388/?Remark=Prism&OTA=true")!
+
+        let profile = ServerProfile(url: url)
+
+        XCTAssertNotNil(profile)
+
+        XCTAssertEqual(profile?.serverHost, "example.com")
+        XCTAssertEqual(profile?.serverPort, 8388)
+        XCTAssertEqual(profile?.method, "aes-256-cfb")
+        XCTAssertEqual(profile?.password, "password")
+        XCTAssertEqual(profile?.remark, "Prism")
+        XCTAssertEqual(profile?.ota, true)
+    }
+
+    func testInitWithSIP002URLProfileName() {
+        let url = URL(string: "ss://YWVzLTI1Ni1jZmI6cGFzc3dvcmQ=@example.com:8388/#Name")!
+
+        let profile = ServerProfile(url: url)
+
+        XCTAssertNotNil(profile)
+        XCTAssertEqual(profile?.remark, "Name")
+    }
+
+    func testInitWithSIP002URLProfileNameOverride() {
+        let url = URL(string: "ss://YWVzLTI1Ni1jZmI6cGFzc3dvcmQ=@example.com:8388/?Remark=Name#Overriden")!
+
+        let profile = ServerProfile(url: url)
+
+        XCTAssertNotNil(profile)
+        XCTAssertEqual(profile?.remark, "Overriden")
+    }
+
     func testPerformanceExample() {
         // This is an example of a performance test case.
         self.measure {