#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (C) 2008-2013 ShareX Developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at .
*/
#endregion License Information (GPL v3)
using HelpersLib;
using Newtonsoft.Json;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Xml.Linq;
using UploadersLib.HelperClasses;
namespace UploadersLib.ImageUploaders
{
public class Picasa : ImageUploader, IOAuth2
{
public OAuth2Info AuthInfo { get; set; }
public string AlbumID { get; set; }
private static readonly XNamespace AtomNS = "http://www.w3.org/2005/Atom";
private static readonly XNamespace MediaNS = "http://search.yahoo.com/mrss/";
private static readonly XNamespace GPhotoNS = "http://schemas.google.com/photos/2007";
public Picasa(OAuth2Info oauth)
{
AuthInfo = oauth;
}
public string GetAuthorizationURL()
{
return string.Format("https://accounts.google.com/o/oauth2/auth?response_type={0}&client_id={1}&redirect_uri={2}&scope={3}",
"code", AuthInfo.Client_ID, "urn:ietf:wg:oauth:2.0:oob", Helpers.URLEncode("https://picasaweb.google.com/data"));
}
public bool GetAccessToken(string code)
{
Dictionary args = new Dictionary();
args.Add("code", code);
args.Add("client_id", AuthInfo.Client_ID);
args.Add("client_secret", AuthInfo.Client_Secret);
args.Add("redirect_uri", "urn:ietf:wg:oauth:2.0:oob");
args.Add("grant_type", "authorization_code");
string response = SendPostRequest("https://accounts.google.com/o/oauth2/token", args);
if (!string.IsNullOrEmpty(response))
{
OAuth2Token token = JsonConvert.DeserializeObject(response);
if (token != null && !string.IsNullOrEmpty(token.access_token))
{
token.UpdateExpireDate();
AuthInfo.Token = token;
return true;
}
}
return false;
}
public bool RefreshAccessToken()
{
if (OAuth2Info.CheckOAuth(AuthInfo) && !string.IsNullOrEmpty(AuthInfo.Token.refresh_token))
{
Dictionary args = new Dictionary();
args.Add("refresh_token", AuthInfo.Token.refresh_token);
args.Add("client_id", AuthInfo.Client_ID);
args.Add("client_secret", AuthInfo.Client_Secret);
args.Add("grant_type", "refresh_token");
string response = SendPostRequest("https://accounts.google.com/o/oauth2/token", args);
if (!string.IsNullOrEmpty(response))
{
OAuth2Token token = JsonConvert.DeserializeObject(response);
if (token != null && !string.IsNullOrEmpty(token.access_token))
{
token.UpdateExpireDate();
string refresh_token = AuthInfo.Token.refresh_token;
AuthInfo.Token = token;
AuthInfo.Token.refresh_token = refresh_token;
return true;
}
}
}
return false;
}
public bool CheckAuthorization()
{
if (OAuth2Info.CheckOAuth(AuthInfo))
{
if (AuthInfo.Token.IsExpired && !RefreshAccessToken())
{
Errors.Add("Refresh access token failed.");
return false;
}
}
else
{
Errors.Add("Login is required.");
return false;
}
return true;
}
public List GetAlbumList()
{
if (!CheckAuthorization()) return null;
List albumList = new List();
NameValueCollection headers = new NameValueCollection();
headers.Add("Authorization", "Bearer " + AuthInfo.Token.access_token);
string response = SendGetRequest("https://picasaweb.google.com/data/feed/api/user/default", null, ResponseType.Text, null, headers);
if (!string.IsNullOrEmpty(response))
{
XDocument xd = XDocument.Parse(response);
if (xd != null)
{
foreach (XElement entry in xd.Descendants(AtomNS + "entry"))
{
PicasaAlbumInfo album = new PicasaAlbumInfo();
album.ID = entry.GetElementValue(GPhotoNS + "id");
album.Name = entry.GetElementValue(GPhotoNS + "name");
album.Summary = entry.GetElementValue(AtomNS + "summary");
albumList.Add(album);
}
}
}
return albumList;
}
public override UploadResult Upload(Stream stream, string fileName)
{
if (!CheckAuthorization()) return null;
if (string.IsNullOrEmpty(AlbumID))
{
AlbumID = "default";
}
UploadResult ur = new UploadResult();
string url = string.Format("https://picasaweb.google.com/data/feed/api/user/default/albumid/" + AlbumID);
string contentType = Helpers.GetMimeType(fileName);
NameValueCollection headers = new NameValueCollection();
headers.Add("Authorization", "Bearer " + AuthInfo.Token.access_token);
headers.Add("Slug", Helpers.URLEncode(fileName));
ur.Response = SendPostRequestStream(url, stream, contentType, null, headers);
XDocument xd = XDocument.Parse(ur.Response);
XElement entry_element = xd.Element(AtomNS + "entry");
if (entry_element != null)
{
XElement group_element = entry_element.Element(MediaNS + "group");
if (group_element != null)
{
XElement content_element = group_element.Element(MediaNS + "content");
if (content_element != null)
{
ur.ThumbnailURL = content_element.GetAttributeValue("url");
int last_slash_index = ur.ThumbnailURL.LastIndexOf(@"/");
ur.URL = ur.ThumbnailURL.Insert(last_slash_index, @"/s0");
}
}
}
return ur;
}
}
public class PicasaAlbumInfo
{
public string ID { get; set; }
public string Name { get; set; }
public string Summary { get; set; }
}
}