/// <summary>
/// Initiates a request to the feed service.
/// </summary>
protected virtual void Poll()
{
if (_retryDateTime > DateTime.Now)
{
return;
}
_timer.Stop();
AsyncWebRequest request = new AsyncWebRequest();
request.Result += Request_Result;
request.Request(BuildQuery());
}
public static void GetFlickrImageSizes(ImageFeedItem imageFeedItem, string flickrApiKey, GetFlickrImageSizesCallback callback)
{
if (imageFeedItem == null || (imageFeedItem.Sizes != null && imageFeedItem.Sizes.Count > 0) || imageFeedItem.SourceType != SourceType.Flickr)
{
callback(imageFeedItem);
}
string query = string.Format(CultureInfo.InvariantCulture, "http://api.flickr.com/services/rest/?method=flickr.photos.getSizes&api_key={0}&photo_id={1}", flickrApiKey, imageFeedItem.ServiceId);
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri(query));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(imageFeedItem);
}
try
{
XDocument doc = XDocument.Parse(e.Response);
imageFeedItem.Sizes = new Dictionary<Size, Uri>();
foreach (XElement size in doc.Descendants("size"))
{
imageFeedItem.Sizes[new Size(int.Parse(size.Attribute("width").Value, CultureInfo.InvariantCulture), int.Parse(size.Attribute("height").Value, CultureInfo.InvariantCulture))] = new Uri(size.Attribute("source").Value);
}
callback(imageFeedItem);
}
catch
{
callback(imageFeedItem);
}
};
}
internal static void GetTwitterUserIdFromUserName(string username, GetTwitterUserIdFromUserNameCallback callback)
{
if (_twitterUserNameCache.ContainsValue(username))
{
callback((from kvp in _twitterUserNameCache where kvp.Value == username select kvp.Key).FirstOrDefault());
return;
}
string query = string.Format(CultureInfo.InvariantCulture, "http://api.twitter.com/1/users/show.xml?screen_name={0}", username);
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri(query));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null);
}
try
{
string userid = XDocument.Parse(e.Response).Element("user").Element("id").Value;
_twitterUserNameCache[userid] = username;
callback(userid);
}
catch
{
callback(null);
}
};
}
internal static void GetFlickrGroupIdFromGroupName(string groupname, string apiKey, GetFlickrGroupIdFromGroupNameCallback callback)
{
if (_flickrGroupNameCache.ContainsValue(groupname))
{
callback((from kvp in _flickrGroupNameCache where kvp.Value == groupname select kvp.Key).FirstOrDefault());
return;
}
string groupurl = string.Format(CultureInfo.InvariantCulture, "http://www.flickr.com/groups/{0}", groupname);
string query = string.Format(CultureInfo.InvariantCulture, "http://api.flickr.com/services/rest/?method=flickr.urls.lookupGroup&api_key={0}&url={1}", apiKey, groupurl);
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri(query));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null);
}
try
{
string groupid = XDocument.Parse(e.Response).Element("rsp").Element("group").Attribute("id").Value;
_flickrUserNameCache[groupid] = groupname;
callback(groupid);
}
catch
{
callback(null);
}
};
}
internal static void GetFlickrUserIdFromUserName(string username, string apiKey, GetFlickrUserIdFromUserNameCallback callback)
{
if (_flickrUserNameCache.ContainsValue(username))
{
callback((from kvp in _flickrUserNameCache where kvp.Value == username select kvp.Key).FirstOrDefault());
return;
}
string query = string.Format(CultureInfo.InvariantCulture, "http://api.flickr.com/services/rest/?method=flickr.people.findByUsername&api_key={0}&username={1}", apiKey, username);
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri(query));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null);
}
try
{
string userid = XDocument.Parse(e.Response).Element("rsp").Element("user").Attribute("nsid").Value;
_flickrUserNameCache[userid] = username;
callback(userid);
}
catch
{
callback(null);
}
};
}
private static bool ExtractYFrogImageLink(string status, GetImageLinkCallback callback)
{
Match match = Regex.Match(status, @"http://(www\.)?yfrog.com/(\w+)\b", RegexOptions.IgnoreCase);
if (!match.Success)
{
return false;
}
status = status.Replace(match.Groups[0].Value, string.Empty).Trim();
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri("http://yfrog.com/api/xmlInfo?path=" + match.Groups[2].Value));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null, status);
}
try
{
using (StringReader stringReader = new StringReader(e.Response))
{
XmlTextReader xmlTextReader = new XmlTextReader(stringReader);
while (xmlTextReader.Read())
{
if (xmlTextReader.MoveToContent() == XmlNodeType.Element && xmlTextReader.Name == "image_link")
{
string uriString = xmlTextReader.ReadString();
string extension = Path.GetExtension(uriString).ToUpper(CultureInfo.InvariantCulture);
if (extension == ".JPG" || extension == ".PNG" || extension == ".GIF")
{
// sometimes there will be video files, and we don't want that.
callback(new Uri(uriString), status);
}
}
}
}
}
catch
{
callback(null, status);
}
};
return true;
}
/// <summary>
/// Extracts image links to the TwitPic service from status messages.
/// </summary>
/// <param name="status">The status.</param>
/// <param name="callback">The callback.</param>
/// <returns>True if an image link was found, false otherwise.</returns>
private static bool ExtractTwitPicImageLink(string status, GetImageLinkCallback callback)
{
Match match = Regex.Match(status, @"http://(www\.)?twitpic.com/(\w+)\b", RegexOptions.IgnoreCase);
if (!match.Success)
{
return false;
}
string twitpic = match.Groups[0].Value;
string twitpicId = match.Groups[2].Value;
status = status.Replace(twitpic, string.Empty).Trim();
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri(string.Format(CultureInfo.InvariantCulture, "http://api.twitpic.com/2/media/show.xml?id={0}", twitpicId)));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null, status);
}
else
{
callback(new Uri(@"http://twitpic.com/show/large/" + match.Groups[2].Value), status);
}
};
return true;
}
private static bool ExtractTweetPhotoImageLink(string status, GetImageLinkCallback callback)
{
Match match = Regex.Match(status, @"http://(www\.)?tweetphoto.com/(\d+)\b", RegexOptions.IgnoreCase);
if (!match.Success)
{
return false;
}
status = status.Replace(match.Groups[0].Value, string.Empty).Trim();
AsyncWebRequest request = new AsyncWebRequest();
request.Request(new Uri("http://tweetphotoapi.com/api/tpapi.svc/photos/" + match.Groups[2].Value));
request.Result += (sender, e) =>
{
if (e.Status != HttpStatusCode.OK)
{
callback(null, status);
}
try
{
using (StringReader stringReader = new StringReader(e.Response))
{
XmlTextReader reader = new XmlTextReader(stringReader);
while (reader.Read())
{
if (reader.MoveToContent() == XmlNodeType.Element && reader.Name == "BigImageUrl")
{
callback(new Uri(reader.ReadString()), status);
}
}
}
}
catch
{
callback(null, status);
}
};
return true;
}