/// <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 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>
/// Parses a status message for known URLs for image hosting services, and returns a URL to the image.
/// </summary>
/// <param name="status">The status text.</param>
/// <param name="callback">The callback.</param>
/// <returns>Whether or not an image URL was found.</returns>
internal static bool GetImageLink(string status, GetImageLinkCallback callback)
{
if (ExtractYFrogImageLink(status, callback))
{
return(true);
}
if (ExtractTwitPicImageLink(status, callback))
{
return(true);
}
if (ExtractTweetPhotoImageLink(status, callback))
{
return(true);
}
return(false);
}
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);
}
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;
}
/// <summary>
/// Parses a status message for known URLs for image hosting services, and returns a URL to the image.
/// </summary>
/// <param name="status">The status text.</param>
/// <param name="callback">The callback.</param>
/// <returns>Whether or not an image URL was found.</returns>
internal static bool GetImageLink(string status, GetImageLinkCallback callback)
{
if (ExtractYFrogImageLink(status, callback))
{
return true;
}
if (ExtractTwitPicImageLink(status, callback))
{
return true;
}
if (ExtractTweetPhotoImageLink(status, callback))
{
return true;
}
return false;
}
