Add mock TURN server implementation

Session.xcodeproj/project.pbxproj

@@ -158,6 +158,7 @@
 		B8041A9525C8FA1D003C2166 /* MediaLoaderView.swift in Sources */ = {isa = PBXBuildFile; fileRef = B8041A9425C8FA1D003C2166 /* MediaLoaderView.swift */; };
 		B8041AA725C90927003C2166 /* TypingIndicatorCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = B8041AA625C90927003C2166 /* TypingIndicatorCell.swift */; };
 		B806ECA126C4A7E4008BDA44 /* CallManager+UI.swift in Sources */ = {isa = PBXBuildFile; fileRef = B806ECA026C4A7E4008BDA44 /* CallManager+UI.swift */; };
+		B806ECA326C4A8C6008BDA44 /* TURNServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = B806ECA226C4A8C6008BDA44 /* TURNServer.swift */; };
 		B80A579F23DFF1F300876683 /* NewClosedGroupVC.swift in Sources */ = {isa = PBXBuildFile; fileRef = B80A579E23DFF1F300876683 /* NewClosedGroupVC.swift */; };
 		B817AD9A26436593009DF825 /* SimplifiedConversationCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = B817AD9926436593009DF825 /* SimplifiedConversationCell.swift */; };
 		B817AD9C26436F73009DF825 /* ThreadPickerVC.swift in Sources */ = {isa = PBXBuildFile; fileRef = B817AD9B26436F73009DF825 /* ThreadPickerVC.swift */; };
@@ -1144,6 +1145,7 @@
 		B8041A9425C8FA1D003C2166 /* MediaLoaderView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MediaLoaderView.swift; sourceTree = "<group>"; };
 		B8041AA625C90927003C2166 /* TypingIndicatorCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TypingIndicatorCell.swift; sourceTree = "<group>"; };
 		B806ECA026C4A7E4008BDA44 /* CallManager+UI.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CallManager+UI.swift"; sourceTree = "<group>"; };
+		B806ECA226C4A8C6008BDA44 /* TURNServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TURNServer.swift; sourceTree = "<group>"; };
 		B80A579E23DFF1F300876683 /* NewClosedGroupVC.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NewClosedGroupVC.swift; sourceTree = "<group>"; };
 		B817AD9926436593009DF825 /* SimplifiedConversationCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SimplifiedConversationCell.swift; sourceTree = "<group>"; };
 		B817AD9B26436F73009DF825 /* ThreadPickerVC.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThreadPickerVC.swift; sourceTree = "<group>"; };
@@ -2341,6 +2343,7 @@
 			children = (
 				B8DE1FB326C22F2F0079C9CE /* CallManager.swift */,
 				B806ECA026C4A7E4008BDA44 /* CallManager+UI.swift */,
+				B806ECA226C4A8C6008BDA44 /* TURNServer.swift */,
 			);
 			path = Calls;
 			sourceTree = "<group>";
@@ -4753,6 +4756,7 @@
 				B8856D11256F112A001CE70E /* OWSAudioSession.swift in Sources */,
 				C3DB66C3260ACCE6001EFC55 /* OpenGroupPollerV2.swift in Sources */,
 				C3C2A75F2553A3C500C340D1 /* VisibleMessage+LinkPreview.swift in Sources */,
+				B806ECA326C4A8C6008BDA44 /* TURNServer.swift in Sources */,
 				C32C5FBB256E0206003C73A2 /* OWSBackgroundTask.m in Sources */,
 				B8856CA8256F0F42001CE70E /* OWSBackupFragment.m in Sources */,
 				C32C5C3D256DCBAF003C73A2 /* AppReadiness.m in Sources */,

SessionMessagingKit/Calls/TURNServer.swift

@@ -0,0 +1,20 @@
+//
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+// 
+
+import PromiseKit
+
+enum MockTURNSserver {
+    
+    static func getICEServerURL() -> Promise<String> {
+        HTTP.execute(.get, "https://appr.tc/params").map2 { json in
+            guard let url = json["ice_server_url"] as? String else { throw HTTP.Error.invalidJSON }
+            return url
+        }
+    }
+    
+    static func makeTurnServerRequest(iceServerURL: String) -> Promise<JSON> {
+        let headers = [ "referer" : "https://appr.tc" ]
+        return HTTP.execute(.post, iceServerURL, body: nil, headers: headers)
+    }
+}

SessionUtilitiesKit/Networking/HTTP.swift

@@ -109,7 +109,7 @@ public enum HTTP {
         }
     }
 
-    public static func execute(_ verb: Verb, _ url: String, body: Data?, timeout: TimeInterval = HTTP.timeout, useSeedNodeURLSession: Bool = false) -> Promise<JSON> {
+    public static func execute(_ verb: Verb, _ url: String, body: Data?, headers: [String:String] = [:], timeout: TimeInterval = HTTP.timeout, useSeedNodeURLSession: Bool = false) -> Promise<JSON> {
         var request = URLRequest(url: URL(string: url)!)
         request.httpMethod = verb.rawValue
         request.httpBody = body
@@ -117,6 +117,9 @@ public enum HTTP {
         request.allHTTPHeaderFields?.removeValue(forKey: "User-Agent")
         request.setValue("WhatsApp", forHTTPHeaderField: "User-Agent") // Set a fake value
         request.setValue("en-us", forHTTPHeaderField: "Accept-Language") // Set a fake value
+        headers.forEach { (key, value) in
+            request.setValue(value, forHTTPHeaderField: key)
+        }
         let (promise, seal) = Promise<JSON>.pending()
         let urlSession = useSeedNodeURLSession ? seedNodeURLSession : snodeURLSession
         let task = urlSession.dataTask(with: request) { data, response, error in