protected object GetImage(string uriString)
{
try
{
var uri = new Uri(uriString.Substring(0, 65519)); //Uri MaxLength is 65519 (https://msdn.microsoft.com/en-us/library/z6c2z492.aspx)
// handle data/uri embedded images (http://en.wikipedia.org/wiki/Data_URI_scheme)
if (uri.IsAbsoluteUri && uri.Scheme == "data")
{
int dataIdx = uriString.IndexOf(",") + 1;
if (dataIdx <= 0 || dataIdx + 1 > uriString.Length)
{
throw new Exception("Invalid data URI");
}
// we're assuming base64, as ascii encoding would be *highly* unsusual for images
// also assuming it's png or jpeg mimetype
byte[] imageBytes = Convert.FromBase64String(uriString.Substring(dataIdx));
using (var stream = new MemoryStream(imageBytes))
{
return(Image.FromStream(stream));
}
}
if (!uri.IsAbsoluteUri)
{
uri = new Uri(OwnerDocument.BaseUri, uri);
}
// should work with http: and file: protocol urls
var httpRequest = WebRequest.Create(uri);
using (WebResponse webResponse = httpRequest.GetResponse())
{
using (var stream = webResponse.GetResponseStream())
{
if (stream.CanSeek)
{
stream.Position = 0;
}
if (uri.LocalPath.EndsWith(".svg", StringComparison.InvariantCultureIgnoreCase))
{
var doc = SvgDocument.Open <SvgDocument>(stream);
doc.BaseUri = uri;
return(doc);
}
else
{
return(Bitmap.FromStream(stream));
}
}
}
}
catch (Exception ex)
{
SvgLogger.Instance.LogError(string.Format("Error loading image: '{0}', error: {1} ", uriString, ex.Message));
return(null);
}
}
protected Image GetImage(Uri uri)
{
try
{
// handle data/uri embedded images (http://en.wikipedia.org/wiki/Data_URI_scheme)
if (uri.IsAbsoluteUri && uri.Scheme == "data")
{
string uriString = uri.OriginalString;
int dataIdx = uriString.IndexOf(",") + 1;
if (dataIdx <= 0 || dataIdx + 1 > uriString.Length)
{
throw new Exception("Invalid data URI");
}
// we're assuming base64, as ascii encoding would be *highly* unsusual for images
// also assuming it's png or jpeg mimetype
byte[] imageBytes = Convert.FromBase64String(uriString.Substring(dataIdx));
Image image = Image.FromStream(new MemoryStream(imageBytes));
return(image);
}
if (!uri.IsAbsoluteUri)
{
uri = new Uri(OwnerDocument.BaseUri, uri);
}
// should work with http: and file: protocol urls
var httpRequest = WebRequest.Create(uri);
using (WebResponse webResponse = httpRequest.GetResponse())
{
MemoryStream ms = BufferToMemoryStream(webResponse.GetResponseStream());
if (uri.LocalPath.EndsWith(".svg", StringComparison.InvariantCultureIgnoreCase))
{
var doc = SvgDocument.Open <SvgDocument>(ms);
return(doc.Draw());
}
else
{
return(Bitmap.FromStream(ms));
}
}
}
catch (Exception ex)
{
Trace.TraceError("Error loading image: '{0}', error: {1} ", uri, ex.Message);
return(null);
}
}
public virtual SvgElement GetElementById(Uri uri)
{
var urlString = GetUrlString(uri.ToString());
if (!urlString.StartsWith("#"))
{
var index = urlString.LastIndexOf('#');
var fragment = urlString.Substring(index);
uri = new Uri(urlString.Remove(index, fragment.Length), UriKind.RelativeOrAbsolute);
if (!uri.IsAbsoluteUri && _document.BaseUri != null)
{
uri = new Uri(_document.BaseUri, uri);
}
if (!ResolveExternalElements.AllowsResolving(uri))
{
Trace.TraceWarning("Trying to resolve element by ID from '{0}', but resolving external resources of that type is disabled.", uri);
return(null);
}
if (uri.IsAbsoluteUri)
{
if (uri.IsFile)
{
var doc = SvgDocument.Open <SvgDocument>(uri.LocalPath);
return(doc.IdManager.GetElementById(fragment));
}
else if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
var httpRequest = WebRequest.Create(uri);
using (var webResponse = httpRequest.GetResponse())
{
var doc = SvgDocument.Open <SvgDocument>(webResponse.GetResponseStream());
return(doc.IdManager.GetElementById(fragment));
}
}
else
{
throw new NotSupportedException();
}
}
}
return(GetElementById(urlString));
}
public virtual SvgElement GetElementById(Uri uri)
{
var urlString = GetUrlString(uri.ToString());
if (!urlString.StartsWith("#"))
{
var index = urlString.LastIndexOf('#');
var fragment = urlString.Substring(index);
uri = new Uri(urlString.Remove(index, fragment.Length), UriKind.RelativeOrAbsolute);
if (!uri.IsAbsoluteUri && _document.BaseUri != null)
{
uri = new Uri(_document.BaseUri, uri);
}
if (uri.IsAbsoluteUri)
{
if (uri.IsFile)
{
var doc = SvgDocument.Open <SvgDocument>(uri.LocalPath);
return(doc.IdManager.GetElementById(fragment));
}
else if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
var httpRequest = WebRequest.Create(uri);
using (var webResponse = httpRequest.GetResponse())
{
var doc = SvgDocument.Open <SvgDocument>(webResponse.GetResponseStream());
return(doc.IdManager.GetElementById(fragment));
}
}
else
{
throw new NotSupportedException();
}
}
}
return(GetElementById(urlString));
}
