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@@ -0,0 +1,109 @@
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+/*
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+ *
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+ * Copyright 2016, Google Inc.
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions are
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+ * met:
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+ *
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+ * * Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions and the following disclaimer.
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+ * * Redistributions in binary form must reproduce the above
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+ * copyright notice, this list of conditions and the following disclaimer
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+ * in the documentation and/or other materials provided with the
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+ * distribution.
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+ * * Neither the name of Google Inc. nor the names of its
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+ * contributors may be used to endorse or promote products derived from
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+ * this software without specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ */
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+import Foundation
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+
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+
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+func escape(_ string : String) -> String {
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+
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+ let dashes = CharacterSet(charactersIn: "-._")
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+ let acceptable = dashes.union(.alphanumerics)
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+ return string.addingPercentEncoding(withAllowedCharacters: acceptable)!
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+}
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+
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+class OAuthClient {
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+ var clientID : String = ""
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+ var clientSecret : String = ""
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+ var redirectURIs : [String] = []
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+ var authURI : String = ""
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+ var tokenURI : String = ""
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+
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+ var token : String? = nil
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+
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+ init () {
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+ clientID = "885917370891-n3r74v6miibn2969estdofr68ggqa1sn.apps.googleusercontent.com"
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+ clientSecret = "_JDxU8iGdHYfeeER9AAEaHbn"
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+ redirectURIs = ["http://localhost"]
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+ authURI = "https://accounts.google.com/o/oauth2/auth"
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+ tokenURI = "https://accounts.google.com/o/oauth2/token"
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+ }
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+
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+ let scope = "https://www.googleapis.com/auth/datastore"
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+
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+ func authCodeURL(state : String) -> URL? {
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+
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+ var path = authURI
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+ path = path + "?response_type=" + "code"
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+ path = path + "&client_id=" + clientID
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+ path = path + "&redirect_uri=" + escape(redirectURIs[0])
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+ path = path + "&scope=" + escape(scope)
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+ path = path + "&state=" + state
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+
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+ print("PATH " + path)
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+
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+ return URL(string:path)
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+ }
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+
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+ func exchangeCode(code: String) {
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+ let path = tokenURI
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+ var body = ""
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+ body = body + "client_id=" + clientID
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+ body = body + "&client_secret=" + clientSecret
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+ body = body + "&code=" + escape(code)
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+ body = body + "&grant_type=" + "authorization_code"
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+ body = body + "&redirect_uri=" + escape(redirectURIs[0])
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+
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+ print("path: \(path)")
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+ print("body: \(body)")
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+
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+ let url = URL(string:path)!
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+ var request = URLRequest(url:url)
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+ request.httpMethod = "POST"
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+ request.httpBody = body.data(using:.utf8)
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+ request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
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+
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+ print("headers: \(request.allHTTPHeaderFields)")
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+ let task = URLSession.shared.dataTask(with:request) { (data, response, error) in
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+ var json: [String:Any]!
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+ do {
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+ json = try JSONSerialization.jsonObject(with:data!, options: JSONSerialization.ReadingOptions()) as? Dictionary
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+ } catch {
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+ print(error)
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+ }
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+ print(json)
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+ self.token = json["access_token"] as! String?
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+ print(self.token)
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+
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+ }
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+ task.resume()
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+ }
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+}
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Tim Burks