internal Assembly Load(byte [] buffer, ManifestAssemblyKind kind)
{
try {
Assembly result = Assembly.Load(buffer);
Dispatcher.Invoke(new AssemblyRegistration(AssemblyRegister), new object[] { result, kind });
return(result);
}
catch {
return(null);
}
}
// note: only access 'assemblies' from the main thread
void AssemblyRegister(Assembly assembly, ManifestAssemblyKind kind)
{
if (!assemblies.Contains(assembly))
{
assemblies.Add(assembly);
if (kind == ManifestAssemblyKind.SourceAssembly)
{
if (string.Equals(assembly.GetName().Name, EntryPointAssembly, StringComparison.OrdinalIgnoreCase))
{
EntryAssembly = assembly;
}
}
}
}
void DownloadAssembly(Uri uri, ManifestAssemblyKind kind)
{
Uri xap = new Uri(NativeMethods.plugin_instance_get_source_location(PluginHost.Handle));
// WebClient deals with relative URI but HttpWebRequest does not
// but we need the later to detect redirection
if (!uri.IsAbsoluteUri)
{
uri = new Uri(xap, uri);
}
else if (xap.Scheme != uri.Scheme)
{
throw new SecurityException("Cross scheme URI downloading " + uri.ToString());
}
#if NET_3_0
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
#else
HttpWebRequest req = (HttpWebRequest)WebRequestCreator.BrowserHttp.Create(uri);
#endif
req.BeginGetResponse(AssemblyGetResponse, new object[] { req, kind });
pending_downloads++;
}
// note: only access 'assemblies' from the main thread
void AssemblyRegister (Assembly assembly, ManifestAssemblyKind kind)
{
if (!assemblies.Contains (assembly)) {
assemblies.Add (assembly);
if (kind == ManifestAssemblyKind.SourceAssembly) {
if (string.Equals (assembly.GetName ().Name, EntryPointAssembly, StringComparison.OrdinalIgnoreCase))
EntryAssembly = assembly;
}
}
}
internal Assembly Load (byte [] buffer, ManifestAssemblyKind kind)
{
try {
Assembly result = Assembly.Load (buffer);
Dispatcher.Invoke (new AssemblyRegistration (AssemblyRegister), new object[] { result, kind });
return result;
}
catch {
return null;
}
}
void DownloadAssembly (Uri uri, ManifestAssemblyKind kind)
{
Uri xap = new Uri (NativeMethods.plugin_instance_get_source_location (PluginHost.Handle));
// WebClient deals with relative URI but HttpWebRequest does not
// but we need the later to detect redirection
if (!uri.IsAbsoluteUri) {
uri = new Uri (xap, uri);
} else if (xap.Scheme != uri.Scheme) {
throw new SecurityException ("Cross scheme URI downloading " + uri.ToString ());
}
#if NET_3_0
HttpWebRequest req = (HttpWebRequest) WebRequest.Create (uri);
#else
HttpWebRequest req = (HttpWebRequest) WebRequestCreator.BrowserHttp.Create (uri);
#endif
req.BeginGetResponse (AssemblyGetResponse, new object[] { req, kind });
pending_downloads ++;
}
// note: throwing MoonException from here is NOT ok since this code is called async
// and the exception won't be reported, directly, to the caller
void AssemblyGetResponse(IAsyncResult result)
{
Assembly asm;
object[] tuple = (object [])result.AsyncState;
WebRequest wreq = (WebRequest)tuple [0];
ManifestAssemblyKind kind = (ManifestAssemblyKind)tuple [1];
int error_code = (kind == ManifestAssemblyKind.ExternalAssembly) ? 2152 : 2105;
try {
HttpWebResponse wresp = (HttpWebResponse)wreq.EndGetResponse(result);
if (wresp.StatusCode != HttpStatusCode.OK)
{
wresp.Close();
EmitError(error_code, String.Format("Error while downloading the '{0}'.", wreq.RequestUri));
return;
}
if ((kind != ManifestAssemblyKind.ExternalAssembly) && (wresp.ResponseUri != wreq.RequestUri))
{
wresp.Close();
EmitError(error_code, "Redirection not allowed to download assemblies.");
return;
}
using (Stream responseStream = wresp.GetResponseStream()) {
byte [] buffer = AssemblyPart.StreamToBuffer(responseStream);
if (IsZip(buffer))
{
// unzip it.
using (MemoryStream dest = new MemoryStream()) {
using (MemoryStream source = new MemoryStream(buffer)) {
ManagedStreamCallbacks source_cb;
ManagedStreamCallbacks dest_cb;
StreamWrapper source_wrapper;
StreamWrapper dest_wrapper;
source_wrapper = new StreamWrapper(source);
dest_wrapper = new StreamWrapper(dest);
source_cb = source_wrapper.GetCallbacks();
dest_cb = dest_wrapper.GetCallbacks();
// Zip files may contain multiple assemblies, all of which need to be loaded. Keep
// attempting to open subsequent files until it fails.
for (int i = 0; ; i++)
{
if (!NativeMethods.managed_unzip_stream_to_stream_nth_file(ref source_cb, ref dest_cb, i))
{
break;
}
if (Load(dest.ToArray(), kind) == null)
{
EmitError(2153, String.Format("Error while loading '{0}'.", wreq.RequestUri));
}
source.Position = 0;
dest.SetLength(0);
}
}
}
}
else
{
if (Load(buffer, kind) == null)
{
EmitError(2153, String.Format("Error while loading '{0}'.", wreq.RequestUri));
}
}
}
Dispatcher.BeginInvoke(AsyncDownloadComplete);
}
catch (Exception e) {
// we need to report everything since any error means CreateApplication won't be called
EmitError(error_code, e.ToString());
}
}
