added iOS source code

[wl-app.git] / iOS / Pods / OAuthSwift / Sources / NSError+OAuthSwift.swift

diff --git a/iOS/Pods/OAuthSwift/Sources/NSError+OAuthSwift.swift b/iOS/Pods/OAuthSwift/Sources/NSError+OAuthSwift.swift
new file mode 100644 (file)
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+++ b/iOS/Pods/OAuthSwift/Sources/NSError+OAuthSwift.swift
@@ -0,0 +1,70 @@
+//
+//  NSError+OAuthSwift.swift
+//  OAuthSwift
+//
+//  Created by Goessler, Florian on 04/04/16.
+//  Copyright © 2016 Dongri Jin. All rights reserved.
+//
+
+import Foundation
+
+public extension NSError {
+
+    /// Checks the headers contained in the userInfo whether this error was caused by an 
+    /// expired/invalid access token.
+    ///
+    /// Criteria for invalid token error: WWW-Authenticate header contains a field "error" with
+    /// value "invalid_token".
+    ///
+    /// Also implements a special handling for the Facebook API, which indicates invalid tokens in a 
+    /// different manner. See https://developers.facebook.com/docs/graph-api/using-graph-api#errors
+       public var isExpiredToken: Bool {
+        guard self.domain == NSURLErrorDomain else {
+            return false
+        }
+               if self.code == 401 {
+                       if let reponseHeaders = self.userInfo["Response-Headers"] as? [String: String],
+                               let authenticateHeader = reponseHeaders["WWW-Authenticate"] ?? reponseHeaders["Www-Authenticate"] {
+                               let headerDictionary = authenticateHeader.headerDictionary
+                               if let error = headerDictionary["error"], error == "invalid_token" || error == "\"invalid_token\"" {
+                                       return true
+                               }
+                       }
+            if let body = self.userInfo["Response-Body"] as? String,
+                let bodyData = body.data(using: OAuthSwiftDataEncoding),
+                let json = try? JSONSerialization.jsonObject(with: bodyData, options: []),
+                let jsonDic = json as? [String: AnyObject] {
+                if let error = jsonDic["error"] as? String, error == "invalid_token" || error == "\"invalid_token\"" {
+                    return true
+                }
+                if let errors = jsonDic["errors"] as? [[String: AnyObject]] {
+                    for error in errors {
+                        if let errorType = error["errorType"] as? String, errorType == "invalid_token" {
+                            return true
+                        }
+                    }
+                }
+            }
+               }
+
+        // Detect access token expiration errors from facebook
+        // Docu: https://developers.facebook.com/docs/graph-api/using-graph-api#errors
+        if self.code == 400 {
+            if let urlString = self.userInfo[NSURLErrorFailingURLErrorKey] as? String, urlString.contains("graph.facebook.com") {
+                if let body = self.userInfo["Response-Body"] as? String,
+                    let bodyData = body.data(using: OAuthSwiftDataEncoding),
+                    let json = try? JSONSerialization.jsonObject(with: bodyData, options: []),
+                    let jsonDic = json as? [String: AnyObject] {
+                    let errorCode = jsonDic["error"]?["code"] as? Int
+                    let errorSubCode = jsonDic["error"]?["error_subcode"] as? Int
+                    if (errorCode == 102 && errorSubCode == nil) || errorSubCode == 463 || errorSubCode == 467 {
+                        return true
+                    }
+                }
+            }
+        }
+
+               return false
+       }
+
+}