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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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This commit is contained in:
Robin 2015-04-15 13:16:26 +02:00
commit ea8c27449f
4 changed files with 196 additions and 160 deletions
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109
GreenshotPicasaPlugin/PicasaUtils.cs
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@ -17,14 +17,13 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Xml;
using Greenshot.IniFile;
using Greenshot.Plugin;
using GreenshotPlugin.Core;
using System;
using System.Net;
using System.Xml;
namespace GreenshotPicasaPlugin {
/// <summary>
@ -38,98 +37,6 @@ namespace GreenshotPicasaPlugin {
private const string TokenUrl = "https://www.googleapis.com/oauth2/v3/token";
private const string UploadUrl = "https://picasaweb.google.com/data/feed/api/user/{0}/albumid/{1}";
/// <summary>
/// Authenticate by using the LocalServerCodeReceiver
/// If this works, generate a token
/// </summary>
/// <param name="settings"></param>
private static void Authenticate(OAuth2Settings settings) {
var codeReceiver = new LocalServerCodeReceiver();
IDictionary<string, string> result = codeReceiver.ReceiveCode(settings);
string code;
if (result.TryGetValue("code", out code)) {
GenerateToken(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>
/// Upload parameters by post
/// </summary>
/// <param name="url"></param>
/// <param name="parameters"></param>
/// <returns>response</returns>
public static string HttpPost(string url, IDictionary<string, object> parameters, OAuth2Settings settings) {
var webRequest = (HttpWebRequest)NetworkHelper.CreateWebRequest(url);
webRequest.Method = "POST";
webRequest.KeepAlive = true;
webRequest.Credentials = CredentialCache.DefaultCredentials;
if (!string.IsNullOrEmpty(settings.AccessToken)) {
webRequest.Headers.Add("Authorization", "Bearer " + settings.AccessToken);
}
return NetworkHelper.UploadFormUrlEncoded(webRequest, parameters);
}
private static void GenerateToken(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");
var 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);
}
}
/// <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>
private 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");
var 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);
}
}
/// <summary>
/// Do the actual upload to Picasa
/// </summary>
@ -148,7 +55,7 @@ namespace GreenshotPicasaPlugin {
settings.ClientId = PicasaCredentials.ClientId;
settings.ClientSecret = PicasaCredentials.ClientSecret;
// Copy the settings from the config, which is kept in memory
// Copy the settings from the config, which is kept in memory and on the disk
settings.RefreshToken = Config.RefreshToken;
settings.AccessToken = Config.AccessToken;
settings.AccessTokenExpires = Config.AccessTokenExpires;
@ -156,18 +63,18 @@ namespace GreenshotPicasaPlugin {
try {
// Get Refresh / Access token
if (string.IsNullOrEmpty(settings.RefreshToken)) {
Authenticate(settings);
OAuth2Helper.AuthenticateViaLocalServer(settings);
}
if (settings.IsAccessTokenExpired) {
GenerateAccessToken(settings);
OAuth2Helper.GenerateAccessToken(settings);
}
var webRequest = (HttpWebRequest)NetworkHelper.CreateWebRequest(string.Format(UploadUrl, Config.UploadUser, Config.UploadAlbum));
webRequest.Method = "POST";
webRequest.KeepAlive = true;
webRequest.Credentials = CredentialCache.DefaultCredentials;
webRequest.Headers.Add("Authorization", "Bearer " + settings.AccessToken);
OAuth2Helper.AddOAuth2Credentials(webRequest, settings);
if (Config.AddFilename) {
webRequest.Headers.Add("Slug", NetworkHelper.EscapeDataString(filename));
}
@ -178,7 +85,7 @@ namespace GreenshotPicasaPlugin {
return ParseResponse(response);
} finally {
// Copy the settings back to the config
// Copy the settings back to the config, so they are stored.
Config.RefreshToken = settings.RefreshToken;
Config.AccessToken = settings.AccessToken;
Config.AccessTokenExpires = settings.AccessTokenExpires;