|
private GetAssemblies ( string pathResolveRoot ) : List |
||
| pathResolveRoot | string | |
| return | List |
|
public List <Assembly> GetAssemblies()
{
try
{
string realPath = Path;
if (!File.Exists(realPath))
{
string xllName = DnaLibrary.XllPath;
string localDirectory = System.IO.Path.GetDirectoryName(xllName);
if (System.IO.Path.IsPathRooted(realPath))
{
// Rooted path -- try locally
string fileName = System.IO.Path.GetFileName(realPath);
realPath = System.IO.Path.Combine(localDirectory, fileName);
}
else
{
// Try a path relative to local directory
realPath = System.IO.Path.Combine(localDirectory, realPath);
}
// Check again
if (!File.Exists(realPath))
{
// Give up.
Debug.Print("Could not find file " + Path);
return(new List <Assembly>());
}
}
if (System.IO.Path.GetExtension(realPath).ToLower() == ".dna")
{
// Load as a DnaLibrary
DnaLibrary lib = DnaLibrary.LoadFrom(realPath);
if (lib == null)
{
// Problems during load.
return(new List <Assembly>());
}
return(lib.GetAssemblies());
}
else
{
// Load as a regular assembly
List <Assembly> list = new List <Assembly>();
list.Add(Assembly.LoadFrom(realPath));
return(list);
}
}
catch (Exception e)
{
// Assembly could not be loaded.
Debug.Print("Assembly load exception for file: " + Path + "\n" + e.ToString());
return(new List <Assembly>());
}
}
internal List <ExportedAssembly> GetAssemblies(string pathResolveRoot, DnaLibrary dnaLibrary)
{
List <ExportedAssembly> list = new List <ExportedAssembly>();
try
{
string realPath = Path;
if (Path.StartsWith("packed:"))
{
// The ExternalLibrary is packed.
// We'll have to load it from resources.
string resourceName = Path.Substring(7);
if (Path.EndsWith(".DNA", StringComparison.OrdinalIgnoreCase))
{
byte[] dnaContent = ExcelIntegration.GetDnaFileBytes(resourceName);
DnaLibrary lib = DnaLibrary.LoadFrom(dnaContent, pathResolveRoot);
if (lib == null)
{
Logger.Initialization.Error("External library could not be registered - Path: {0}\r\n - Packed DnaLibrary could not be loaded", Path);
return(list);
}
return(lib.GetAssemblies(pathResolveRoot));
}
else
{
// DOCUMENT: TypeLibPath which is a resource in a library is denoted as fileName.dll\4
// For packed assemblies, we set TypeLibPath="packed:2"
string typeLibPath = null;
if (!string.IsNullOrEmpty(TypeLibPath) && TypeLibPath.StartsWith("packed:"))
{
typeLibPath = DnaLibrary.XllPath + @"\" + TypeLibPath.Substring(7);
}
// It would be nice to check here whether the assembly is loaded already.
// But because of the name mangling in the packing we can't easily check.
// So we make the following assumptions:
// 1. Packed assemblies won't also be loadable from files (else they might be loaded twice)
// 2. ExternalLibrary loads will happen before reference loads via AssemblyResolve.
// Under these assumptions we should not have assemblies loaded more than once,
// even if not checking here.
byte[] rawAssembly = ExcelIntegration.GetAssemblyBytes(resourceName);
byte[] rawPdb = ExcelIntegration.GetPdbBytes(resourceName);
Assembly assembly = ExcelIntegration.LoadFromAssemblyBytes(rawAssembly, rawPdb);
list.Add(new ExportedAssembly(assembly, ExplicitExports, ExplicitRegistration, ComServer, false, typeLibPath, dnaLibrary));
return(list);
}
}
if (Uri.IsWellFormedUriString(Path, UriKind.Absolute))
{
// Here is support for loading ExternalLibraries from http.
Uri uri = new Uri(Path, UriKind.Absolute);
if (uri.IsUnc)
{
realPath = uri.LocalPath;
// Will continue to load later with the regular file load part below...
}
else
{
string scheme = uri.Scheme.ToLowerInvariant();
if (scheme != "http" && scheme != "file" && scheme != "https")
{
Logger.Initialization.Error("The ExternalLibrary path {0} is not a valid Uri scheme.", Path);
return(list);
}
else
{
if (uri.AbsolutePath.EndsWith("dna", StringComparison.InvariantCultureIgnoreCase))
{
DnaLibrary lib = DnaLibrary.LoadFrom(uri);
if (lib == null)
{
Logger.Initialization.Error("External library could not be registered - Path: {0} - DnaLibrary could not be loaded" + Path);
return(list);
}
// CONSIDER: Should we add a resolve story for .dna files at Uris?
return(lib.GetAssemblies(null)); // No explicit resolve path
}
else
{
// Load as a regular assembly - TypeLib not supported.
Assembly assembly = ExcelIntegration.LoadFromAssemblyPath(Path);
list.Add(new ExportedAssembly(assembly, ExplicitExports, ExplicitRegistration, ComServer, false, null, dnaLibrary));
return(list);
}
}
}
}
// Keep trying with the current value of realPath.
string resolvedPath = DnaLibrary.ResolvePath(realPath, pathResolveRoot);
if (resolvedPath == null)
{
Logger.Initialization.Error("External library could not be registered - Path: {0} - The library could not be found at this location" + Path);
return(list);
}
if (System.IO.Path.GetExtension(resolvedPath).Equals(".DNA", StringComparison.OrdinalIgnoreCase))
{
// Load as a DnaLibrary
DnaLibrary lib = DnaLibrary.LoadFrom(resolvedPath);
if (lib == null)
{
Logger.Initialization.Error("External library could not be registered - Path: {0} - DnaLibrary could not be loaded" + Path);
return(list);
}
string pathResolveRelative = System.IO.Path.GetDirectoryName(resolvedPath);
return(lib.GetAssemblies(pathResolveRelative));
}
else
{
Assembly assembly;
// Load as a regular assembly
// First check if it is already loaded (e.g. as a reference from another assembly)
// DOCUMENT: Some cases might still have assemblies loaded more than once.
// E.g. for an assembly that is both ExternalLibrary and references from another assembly,
// having the assembly LoadFromBytes and in the file system would load it twice,
// because LoadFromBytes here happens before the .NET loaders assembly resolution.
string assemblyName = System.IO.Path.GetFileNameWithoutExtension(resolvedPath);
assembly = GetAssemblyIfLoaded(assemblyName);
if (assembly == null)
{
// Really have to load it.
if (LoadFromBytes)
{
// We need to be careful here to not re-load the assembly if it had already been loaded,
// e.g. as a dependency of an assembly loaded earlier.
// In that case we won't be able to have the library 'LoadFromBytes'.
byte[] bytes = File.ReadAllBytes(resolvedPath);
byte[] pdbBytes = null;
string pdbPath = System.IO.Path.ChangeExtension(resolvedPath, "pdb");
if (File.Exists(pdbPath))
{
pdbBytes = File.ReadAllBytes(pdbPath);
}
assembly = ExcelIntegration.LoadFromAssemblyBytes(bytes, pdbBytes);
}
else
{
assembly = ExcelIntegration.LoadFromAssemblyPath(resolvedPath);
}
}
string resolvedTypeLibPath = null;
if (!string.IsNullOrEmpty(TypeLibPath))
{
resolvedTypeLibPath = DnaLibrary.ResolvePath(TypeLibPath, pathResolveRoot); // null is unresolved
if (resolvedTypeLibPath == null)
{
resolvedTypeLibPath = DnaLibrary.ResolvePath(TypeLibPath, System.IO.Path.GetDirectoryName(resolvedPath));
}
}
else
{
// Check for .tlb with same name next to resolvedPath
string tlbCheck = System.IO.Path.ChangeExtension(resolvedPath, "tlb");
if (System.IO.File.Exists(tlbCheck))
{
resolvedTypeLibPath = tlbCheck;
}
}
list.Add(new ExportedAssembly(assembly, ExplicitExports, ExplicitRegistration, ComServer, false, resolvedTypeLibPath, dnaLibrary));
return(list);
}
}
catch (Exception e)
{
// Assembly could not be loaded.
Logger.Initialization.Error(e, "External library could not be registered - Path: {0}", Path);
return(list);
}
}
