/// <summary>
/// Download the FavIcon as a Bitmap
/// </summary>
/// <param name="baseUri"></param>
/// <returns>Bitmap with the FavIcon</returns>
public static Bitmap DownloadFavIcon(Uri baseUri)
{
Uri url = new Uri(baseUri, new Uri("favicon.ico"));
try {
HttpWebRequest request = CreateWebRequest(url);
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
if (request.HaveResponse)
{
using (Stream responseStream = response.GetResponseStream())
{
if (responseStream != null)
{
using (Image image = ImageHelper.FromStream(responseStream))
{
return(image.Height > 16 && image.Width > 16 ? new Bitmap(image, 16, 16) : new Bitmap(image));
}
}
}
}
}
} catch (Exception e) {
Log.Error("Problem downloading the FavIcon from: " + baseUri, e);
}
return(null);
}
/// <summary>
/// Download the uri to Bitmap
/// </summary>
/// <param name="url">Of an image</param>
/// <returns>Bitmap</returns>
public static Image DownloadImage(string url)
{
StringBuilder extensions = new StringBuilder();
foreach (var extension in ImageHelper.StreamConverters.Keys)
{
if (string.IsNullOrEmpty(extension))
{
continue;
}
extensions.AppendFormat(@"\.{0}|", extension);
}
extensions.Length--;
var imageUrlRegex = new Regex($@"(http|https)://.*(?<extension>{extensions})");
var match = imageUrlRegex.Match(url);
try
{
using (var memoryStream = GetAsMemoryStream(url))
{
try
{
return(ImageHelper.FromStream(memoryStream, match.Success ? match.Groups["extension"]?.Value : null));
}
catch (Exception)
{
// If we arrive here, the image loading didn't work, try to see if the response has a http(s) URL to an image and just take this instead.
string content;
using (StreamReader streamReader = new StreamReader(memoryStream, Encoding.UTF8, true))
{
content = streamReader.ReadLine();
}
if (string.IsNullOrEmpty(content))
{
throw;
}
match = imageUrlRegex.Match(content);
if (!match.Success)
{
throw;
}
using (var memoryStream2 = GetAsMemoryStream(match.Value))
{
return(ImageHelper.FromStream(memoryStream2, match.Groups["extension"]?.Value));
}
}
}
}
catch (Exception e)
{
Log.Error("Problem downloading the image from: " + url, e);
}
return(null);
}
/// <summary>
/// Check if the IDataObject has an image
/// </summary>
/// <param name="dataObject"></param>
/// <returns>true if an image is there</returns>
public static bool ContainsImage(IDataObject dataObject)
{
if (dataObject != null)
{
if (dataObject.GetDataPresent(DataFormats.Bitmap) ||
dataObject.GetDataPresent(DataFormats.Dib) ||
dataObject.GetDataPresent(DataFormats.Tiff) ||
dataObject.GetDataPresent(DataFormats.EnhancedMetafile) ||
dataObject.GetDataPresent(FORMAT_PNG) ||
dataObject.GetDataPresent(FORMAT_17) ||
dataObject.GetDataPresent(FORMAT_JPG) ||
dataObject.GetDataPresent(FORMAT_GIF))
{
return(true);
}
var imageFiles = GetImageFilenames(dataObject);
if (imageFiles.Any())
{
return(true);
}
if (dataObject.GetDataPresent(FORMAT_FILECONTENTS))
{
try {
MemoryStream imageStream = dataObject.GetData(FORMAT_FILECONTENTS) as MemoryStream;
if (IsValidStream(imageStream))
{
using (ImageHelper.FromStream(imageStream))
{
// If we get here, there is an image
return(true);
}
}
} catch (Exception) {
// Ignore
}
}
}
return(false);
}
/// <summary>
/// Helper method to try to get an image in the specified format from the dataObject
/// the DIB reader should solve some issues
/// It also supports Format17/DibV5, by using the following information: http://stackoverflow.com/a/14335591
/// </summary>
/// <param name="format">string with the format</param>
/// <param name="dataObject">IDataObject</param>
/// <returns>Image or null</returns>
private static Image GetImageForFormat(string format, IDataObject dataObject)
{
object clipboardObject = GetFromDataObject(dataObject, format);
MemoryStream imageStream = clipboardObject as MemoryStream;
if (!IsValidStream(imageStream))
{
// TODO: add "HTML Format" support here...
return(clipboardObject as Image);
}
if (CoreConfig.EnableSpecialDIBClipboardReader)
{
if (format == FORMAT_17 || format == DataFormats.Dib)
{
Log.Info("Found DIB stream, trying to process it.");
try {
if (imageStream != null)
{
byte[] dibBuffer = new byte[imageStream.Length];
imageStream.Read(dibBuffer, 0, dibBuffer.Length);
BITMAPINFOHEADER infoHeader = BinaryStructHelper.FromByteArray <BITMAPINFOHEADER>(dibBuffer);
if (!infoHeader.IsDibV5)
{
Log.InfoFormat("Using special DIB <v5 format reader with biCompression {0}", infoHeader.biCompression);
int fileHeaderSize = Marshal.SizeOf(typeof(BITMAPFILEHEADER));
uint infoHeaderSize = infoHeader.biSize;
int fileSize = (int)(fileHeaderSize + infoHeader.biSize + infoHeader.biSizeImage);
BITMAPFILEHEADER fileHeader = new BITMAPFILEHEADER
{
bfType = BITMAPFILEHEADER.BM,
bfSize = fileSize,
bfReserved1 = 0,
bfReserved2 = 0,
bfOffBits = (int)(fileHeaderSize + infoHeaderSize + infoHeader.biClrUsed * 4)
};
byte[] fileHeaderBytes = BinaryStructHelper.ToByteArray(fileHeader);
using (MemoryStream bitmapStream = new MemoryStream()) {
bitmapStream.Write(fileHeaderBytes, 0, fileHeaderSize);
bitmapStream.Write(dibBuffer, 0, dibBuffer.Length);
bitmapStream.Seek(0, SeekOrigin.Begin);
var image = ImageHelper.FromStream(bitmapStream);
if (image != null)
{
return(image);
}
}
}
else
{
Log.Info("Using special DIBV5 / Format17 format reader");
// CF_DIBV5
IntPtr gcHandle = IntPtr.Zero;
try {
GCHandle handle = GCHandle.Alloc(dibBuffer, GCHandleType.Pinned);
gcHandle = GCHandle.ToIntPtr(handle);
return
(new Bitmap(infoHeader.biWidth, infoHeader.biHeight,
-(int)(infoHeader.biSizeImage / infoHeader.biHeight),
infoHeader.biBitCount == 32?PixelFormat.Format32bppArgb: PixelFormat.Format24bppRgb,
new IntPtr(handle.AddrOfPinnedObject().ToInt32() + infoHeader.OffsetToPixels + (infoHeader.biHeight - 1) * (int)(infoHeader.biSizeImage / infoHeader.biHeight))
));
} catch (Exception ex) {
Log.Error("Problem retrieving Format17 from clipboard.", ex);
} finally {
if (gcHandle == IntPtr.Zero)
{
GCHandle.FromIntPtr(gcHandle).Free();
}
}
}
}
} catch (Exception dibEx) {
Log.Error("Problem retrieving DIB from clipboard.", dibEx);
}
}
}
else
{
Log.Info("Skipping special DIB format reader as it's disabled in the configuration.");
}
try {
if (imageStream != null)
{
imageStream.Seek(0, SeekOrigin.Begin);
var tmpImage = ImageHelper.FromStream(imageStream);
if (tmpImage != null)
{
Log.InfoFormat("Got image with clipboard format {0} from the clipboard.", format);
return(tmpImage);
}
}
} catch (Exception streamImageEx) {
Log.Error($"Problem retrieving {format} from clipboard.", streamImageEx);
}
return(null);
}
