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Moved some code around, for better re-usage. Also added some debug information, and wrote some comments. [skip ci]

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Robin 2015-04-15 13:16:26 +02:00
parent 6f8434d46f
commit ea8c27449f
4 changed files with 196 additions and 160 deletions
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142
GreenshotPlugin/Core/OAuthHelper.cs
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@ -999,50 +999,114 @@ Greenshot received verification code. You can close this browser / tab if it is
}
/// <summary>
/// Class to hold all the Properties for the OAuth 2 Token request
/// Code to simplify OAuth 2
/// </summary>
public class OAuth2TokenRequest {
public string Code {
get;
set;
}
public string ClientId {
get;
set;
}
public string ClientSecret {
get;
set;
}
public string RedirectUri {
get;
set;
}
public string GrantType {
get;
set;
}
}
public static class OAuth2Helper {
/// <summary>
/// Upload parameters by post
/// </summary>
/// <param name="url"></param>
/// <param name="parameters">Form-Url-Parameters</param>
/// <param name="settings">OAuth2Settings</param>
/// <returns>response</returns>
public static string HttpPost(string url, IDictionary<string, object> parameters, OAuth2Settings settings) {
HttpWebRequest webRequest = (HttpWebRequest)NetworkHelper.CreateWebRequest(url);
webRequest.Method = "POST";
webRequest.KeepAlive = true;
webRequest.Credentials = CredentialCache.DefaultCredentials;
/// <summary>
/// Class to hold all the Properties for the OAuth 2 Token response
/// </summary>
public class OAuth2TokenResponse {
public string AccessToken {
get;
set;
AddOAuth2Credentials(webRequest, settings);
return NetworkHelper.UploadFormUrlEncoded(webRequest, parameters);
}
public string ExpiresIn {
get;
set;
/// <summary>
/// Generate an OAuth 2 Token by using the supplied code
/// </summary>
/// <param name="code">Code to get the RefreshToken</param>
/// <param name="settings">OAuth2Settings to update with the information that was retrieved</param>
public static void GenerateRefreshToken(string code, OAuth2Settings settings) {
// Use the returned code to get a refresh code
IDictionary<string, object> data = new Dictionary<string, object>();
data.Add("code", code);
data.Add("client_id", settings.ClientId);
data.Add("redirect_uri", settings.RedirectUrl);
data.Add("client_secret", settings.ClientSecret);
data.Add("grant_type", "authorization_code");
string accessTokenJsonResult = HttpPost(settings.FormattedTokenUrl, data, settings);
IDictionary<string, object> refreshTokenResult = JSONHelper.JsonDecode(accessTokenJsonResult);
// gives as described here: https://developers.google.com/identity/protocols/OAuth2InstalledApp
// "access_token":"1/fFAGRNJru1FTz70BzhT3Zg",
// "expires_in":3920,
// "token_type":"Bearer",
// "refresh_token":"1/xEoDL4iW3cxlI7yDbSRFYNG01kVKM2C-259HOF2aQbI"
settings.AccessToken = (string)refreshTokenResult["access_token"] as string;
settings.RefreshToken = (string)refreshTokenResult["refresh_token"] as string;
object seconds = refreshTokenResult["expires_in"];
if (seconds != null) {
settings.AccessTokenExpires = DateTimeOffset.Now.AddSeconds((double)seconds);
}
}
public string TokenType {
get;
set;
/// <summary>
/// Go out and retrieve a new access token via refresh-token with the TokenUrl in the settings
/// Will upate the access token, refresh token, expire date
/// </summary>
/// <param name="settings"></param>
public static void GenerateAccessToken(OAuth2Settings settings) {
IDictionary<string, object> data = new Dictionary<string, object>();
data.Add("refresh_token", settings.RefreshToken);
data.Add("client_id", settings.ClientId);
data.Add("client_secret", settings.ClientSecret);
data.Add("grant_type", "refresh_token");
string accessTokenJsonResult = HttpPost(settings.FormattedTokenUrl, data, settings);
// gives as described here: https://developers.google.com/identity/protocols/OAuth2InstalledApp
// "access_token":"1/fFAGRNJru1FTz70BzhT3Zg",
// "expires_in":3920,
// "token_type":"Bearer",
IDictionary<string, object> accessTokenResult = JSONHelper.JsonDecode(accessTokenJsonResult);
settings.AccessToken = (string)accessTokenResult["access_token"] as string;
object seconds = accessTokenResult["expires_in"];
if (seconds != null) {
settings.AccessTokenExpires = DateTimeOffset.Now.AddSeconds((double)seconds);
}
}
public string RefreshToken {
get;
set;
/// <summary>
/// Authenticate via a local server by using the LocalServerCodeReceiver
/// If this works, immediately generate a refresh token afterwards, otherwise this throws an exception
/// </summary>
/// <param name="settings">OAuth2Settings with the Auth / Token url etc</param>
public static void AuthenticateViaLocalServer(OAuth2Settings settings) {
var codeReceiver = new LocalServerCodeReceiver();
IDictionary<string, string> result = codeReceiver.ReceiveCode(settings);
string code;
if (result.TryGetValue("code", out code)) {
GenerateRefreshToken(code, settings);
}
string error;
if (result.TryGetValue("error", out error)) {
if ("access_denied" == error) {
throw new UnauthorizedAccessException("Access denied");
} else {
throw new Exception(error);
}
}
}
/// <summary>
/// Simple helper to add the Authorization Bearer header
/// </summary>
/// <param name="webRequest">WebRequest</param>
/// <param name="settings">OAuth2Settings</param>
public static void AddOAuth2Credentials(HttpWebRequest webRequest, OAuth2Settings settings) {
if (!string.IsNullOrEmpty(settings.AccessToken)) {
webRequest.Headers.Add("Authorization", "Bearer " + settings.AccessToken);
}
}
}
}