I make a website, works on local IIS. Performs user registration + uploading some zip files + generating custom feeds for those zip files.
Using SharpZipLib_0860_Bin ( to unzip file ) , StringTemplate.dll ( to perform custom feed generation ) and NUnit-2.5.7.10213 ( to perform tests).
So far ,so good. Moving into production . User registration works, upload works, trying feeds
“That assembly does not allow partially trusted callers”
Feeds were generated with StringTemplate- it was custom feeds ;-).
Searching , talking with hosting – seeing that this happens if your asp.net does not run under full trust , but under “Medium trust”.
Normally the provider does not want to change and send me advice to put AllowPartiallyTrustedCallersAttribute (APTCA) on the class:
http://msdn.microsoft.com/en-us/library/system.security.allowpartiallytrustedcallersattribute.aspx
This does not work without signing with a strong name – so I generate the snk file , sign mine assemblies, re-deploy. Same error:
“That assembly does not allow partially trusted callers”
That is normally and I have suspected – because I have to sign the stringtemplate, not mine dll.
Trying to see if the stringtemplate is signed -it is! When put AllowPartiallyTrustedCallersAttribute and trying to re-build – failed because I do not have his snk
Then, in disperation, I remove the snk from stringtemplate and re-make my project.
And now –
System.Security.SecurityException: Request failed.
Antlr.StringTemplate.FileSystemTemplateLoader.InternalLoadTemplateContents(String templateName) +0
That means that the files to read contents to generate feeds are not accesible to read. But, oh my dear .NET framework :could you not tell from the beginning ?
So, possible solutions to identify causes : identify the assembly that causes the harm and either
1. put a snk to this assembly and for all assemblies in superior chaining
2. remove the snk from this assembly
In either case, you should see what the error is.
So how I managed to solve ?
1. Put Reflector and dissasemble the source.
2. Re-compile without snk.
3. Put in Web.Config
4. Compile and run with debug
Now it stops at :
string templateText = InternalLoadTemplateContents(templateName);
This , in StringTemplate class, was
protected override string InternalLoadTemplateContents(string templateName)
{
string templateText = null;
string templateLocation = null;
try
{
//templateLocation = Path.Combine(LocationRoot, GetLocationFromTemplateName(templateName));
templateLocation = string.Format("{0}/{1}", LocationRoot, GetLocationFromTemplateName(templateName)).Replace('\\', '/');
StreamReader br;
try
{
br = new StreamReader(templateLocation, encoding);
}
catch(FileNotFoundException)
{
return null;
}
catch(DirectoryNotFoundException)
{
return null;
}
catch(Exception ex)
{
throw new TemplateLoadException("Cannot open template file: " + templateLocation, ex);
}
try
{
templateText = br.ReadToEnd();
if ((templateText != null) && (templateText.Length > 0))
{
//templateText = templateText.Trim();
if (filesWatcher == null)
{
filesWatcher = new FileSystemWatcher(LocationRoot, "*.st");
//filesWatcher.InternalBufferSize *= 2;
filesWatcher.NotifyFilter =
NotifyFilters.LastWrite
| NotifyFilters.Attributes
| NotifyFilters.Security
| NotifyFilters.Size
| NotifyFilters.CreationTime
| NotifyFilters.DirectoryName
| NotifyFilters.FileName;
filesWatcher.IncludeSubdirectories = true;
filesWatcher.Changed += new FileSystemEventHandler(OnChanged);
filesWatcher.Deleted += new FileSystemEventHandler(OnChanged);
filesWatcher.Created += new FileSystemEventHandler(OnChanged);
filesWatcher.Renamed += new RenamedEventHandler(OnRenamed);
filesWatcher.EnableRaisingEvents = true;
}
}
fileSet.Remove(templateLocation);
}
finally
{
if (br != null) ((IDisposable)br).Dispose();
br = null;
}
}
catch (ArgumentException ex)
{
string message;
if (templateText == null)
message = string.Format("Invalid file character encoding: {0}", encoding);
else
message = string.Format("The location root '{0}' and/or the template name '{1}' is invalid.", LocationRoot, templateName);
throw new TemplateLoadException(message, ex);
}
catch (IOException ex)
{
throw new TemplateLoadException("Cannot close template file: " + templateLocation, ex);
}
return templateText;
}
Does something ring a bell to you ?
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Yes – FileSystemWatcher .
http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx
[IODescriptionAttribute(“FileSystemWatcherDesc”)]
[PermissionSetAttribute(SecurityAction.LinkDemand, Name = “FullTrust”)]
[PermissionSetAttribute(SecurityAction.InheritanceDemand, Name = “FullTrust”)]
public class FileSystemWatcher : Component,
Solution : Once defined my FileSystemTemplateLoader_MT – without FileSystemWatcher – all works well
So – the idea is : reflector, sources, find something strange. Remove, rebuild, re-test
(Thanks to OrcsWeb team for helping me on this problem !)
