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//
// System.Web.UI.SimpleWebHandlerParser
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002,2003 Ximian, Inc (http://www.ximian.com)
//
using System;
using System.CodeDom.Compiler;
using System.Collections;
using System.IO;
using System.Reflection;
using System.Text;
using System.Web;
using System.Web.Compilation;
using System.Web.Configuration;
using System.Web.Util;
namespace System.Web.UI
{
public abstract class SimpleWebHandlerParser
{
HttpContext context;
string vPath;
string physPath;
string className;
string codeBehind;
bool debug;
string language;
string program;
bool gotDefault;
ArrayList assemblies;
ArrayList dependencies;
Hashtable anames;
string privateBinPath;
string baseDir;
string baseVDir;
CompilationConfiguration compilationConfig;
int appAssemblyIndex = -1;
protected SimpleWebHandlerParser (HttpContext context, string virtualPath, string physicalPath)
{
this.context = context;
this.vPath = virtualPath;
this.physPath = physicalPath;
AddDependency (physicalPath);
assemblies = new ArrayList ();
string location = Context.ApplicationInstance.AssemblyLocation;
if (location != typeof (TemplateParser).Assembly.Location)
appAssemblyIndex = assemblies.Add (location);
assemblies.AddRange (CompilationConfig.Assemblies);
if (CompilationConfig.AssembliesInBin)
AddAssembliesInBin ();
language = CompilationConfig.DefaultLanguage;
GetDirectivesAndContent ();
}
[MonoTODO]
protected Type GetCompiledTypeFromCache ()
{
return null;
}
void GetDirectivesAndContent ()
{
StreamReader reader = new StreamReader (File.OpenRead (physPath));
string line;
bool directiveFound = false;
StringBuilder content = new StringBuilder ();
while ((line = reader.ReadLine ()) != null) {
string trimmed = line.Trim ();
if (!directiveFound && trimmed == String.Empty)
continue;
if (trimmed.StartsWith ("<")) {
ParseDirective (trimmed);
directiveFound = true;
continue;
}
content.Append (line + "\n");
content.Append (reader.ReadToEnd ());
}
if (!gotDefault)
throw new ParseException (null, "No @WebService directive found");
this.program = content.ToString ();
reader.Close ();
}
void TagParsed (ILocation location, System.Web.Compilation.TagType tagtype, string tagid, TagAttributes attributes)
{
if (tagtype != System.Web.Compilation.TagType.Directive)
throw new ParseException (location, "Unexpected tag");
if (String.Compare (tagid, DefaultDirectiveName, true) == 0) {
AddDefaultDirective (location, attributes);
} else if (String.Compare (tagid, "Assembly", true) == 0) {
AddAssemblyDirective (location, attributes);
} else {
throw new ParseException (location, "Unexpected directive: " + tagid);
}
}
void TextParsed (ILocation location, string text)
{
if (text.Trim () != "")
throw new ParseException (location, "Text not allowed here");
}
void ParseError (ILocation location, string message)
{
throw new ParseException (location, message);
}
static string GetAndRemove (Hashtable table, string key)
{
string o = table [key] as string;
table.Remove (key);
return o;
}
void ParseDirective (string line)
{
AspParser parser = new AspParser (physPath, new StringReader (line));
parser.Error += new ParseErrorHandler (ParseError);
parser.TagParsed += new TagParsedHandler (TagParsed);
parser.TextParsed += new TextParsedHandler (TextParsed);
parser.Parse ();
}
internal virtual void AddDefaultDirective (ILocation location, TagAttributes attrs)
{
if (gotDefault)
throw new ParseException (location, "duplicate " + DefaultDirectiveName + " directive");
gotDefault = true;
Hashtable attributes = attrs.GetDictionary (null);
className = GetAndRemove (attributes, "class");
if (className == null)
throw new ParseException (null, "No Class attribute found.");
string d = GetAndRemove (attributes, "debug");
if (d != null) {
debug = (String.Compare (d, "true", true) == 0);
if (debug == false && String.Compare (d, "false", true) != 0)
throw new ParseException (null, "Invalid value for Debug attribute");
}
language = GetAndRemove (attributes, "language");
if (language == null)
language = CompilationConfig.DefaultLanguage;
codeBehind = GetAndRemove (attributes, "codebehind");
if (attributes.Count > 0)
throw new ParseException (location, "Unrecognized attribute in " +
DefaultDirectiveName + " directive");
}
internal virtual void AddAssemblyDirective (ILocation location, TagAttributes attrs)
{
Hashtable tbl = attrs.GetDictionary (null);
string name = GetAndRemove (tbl, "Name");
string src = GetAndRemove (tbl, "Src");
if (name == null && src == null)
throw new ParseException (location, "You gotta specify Src or Name");
if (name != null && src != null)
throw new ParseException (location, "Src and Name cannot be used together");
if (name != null) {
AddAssemblyByName (name, location);
} else {
GetAssemblyFromSource (src, location);
}
if (tbl.Count > 0)
throw new ParseException (location, "Unrecognized attribute in Assembly directive");
}
internal virtual void AddAssembly (Assembly assembly, bool fullPath)
{
if (anames == null)
anames = new Hashtable ();
string name = assembly.GetName ().Name;
string loc = assembly.Location;
if (fullPath) {
if (!assemblies.Contains (loc)) {
assemblies.Add (loc);
}
anames [name] = loc;
anames [loc] = assembly;
} else {
if (!assemblies.Contains (name)) {
assemblies.Add (name);
}
anames [name] = assembly;
}
}
internal virtual Assembly AddAssemblyByName (string name, ILocation location)
{
if (anames == null)
anames = new Hashtable ();
if (anames.Contains (name)) {
object o = anames [name];
if (o is string)
o = anames [o];
return (Assembly) o;
}
bool fullpath = true;
Assembly assembly = LoadAssemblyFromBin (name);
if (assembly != null) {
AddAssembly (assembly, fullpath);
return assembly;
}
try {
assembly = Assembly.LoadWithPartialName (name);
string loc = assembly.Location;
fullpath = (Path.GetDirectoryName (loc) == PrivateBinPath);
} catch (Exception e) {
throw new ParseException (location, "Assembly " + name + " not found", e);
}
AddAssembly (assembly, fullpath);
return assembly;
}
void AddAssembliesInBin ()
{
if (!Directory.Exists (PrivateBinPath))
return;
string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
foreach (string dll in binDlls) {
try {
Assembly assembly = Assembly.LoadFrom (dll);
AddAssembly (assembly, true);
} catch (Exception e) {
throw new Exception ("Error while loading " + dll, e);
}
}
}
Assembly LoadAssemblyFromBin (string name)
{
Assembly assembly;
if (!Directory.Exists (PrivateBinPath))
return null;
string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
foreach (string dll in binDlls) {
string fn = Path.GetFileName (dll);
fn = Path.ChangeExtension (fn, null);
if (fn != name)
continue;
assembly = Assembly.LoadFrom (dll);
return assembly;
}
return null;
}
Assembly GetAssemblyFromSource (string vpath, ILocation location)
{
vpath = UrlUtils.Combine (BaseVirtualDir, vpath);
string realPath = context.Request.MapPath (vpath);
if (!File.Exists (realPath))
throw new ParseException (location, "File " + vpath + " not found");
AddDependency (realPath);
CompilerResults result = CachingCompiler.Compile (language, realPath, realPath, assemblies);
if (result.NativeCompilerReturnValue != 0) {
StreamReader reader = new StreamReader (realPath);
throw new CompilationException (realPath, result.Errors, reader.ReadToEnd ());
}
AddAssembly (result.CompiledAssembly, true);
return result.CompiledAssembly;
}
internal Type GetTypeFromBin (string typeName)
{
if (!Directory.Exists (PrivateBinPath))
throw new HttpException (String.Format ("Type {0} not found.", typeName));
string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
Type result = null;
foreach (string dll in binDlls) {
Assembly assembly = Assembly.LoadFrom (dll);
Type type = assembly.GetType (typeName, false);
if (type != null) {
if (result != null)
throw new HttpException (String.Format ("Type {0} is not unique.", typeName));
result = type;
}
}
if (result == null)
throw new HttpException (String.Format ("Type {0} not found.", typeName));
return result;
}
internal virtual void AddDependency (string filename)
{
if (dependencies == null)
dependencies = new ArrayList ();
if (!dependencies.Contains (filename))
dependencies.Add (filename);
}
// Properties
protected abstract string DefaultDirectiveName { get; }
internal HttpContext Context {
get { return context; }
}
internal string VirtualPath {
get { return vPath; }
}
internal string PhysicalPath {
get { return physPath; }
}
internal string ClassName {
get { return className; }
}
internal string CodeBehind {
get { return codeBehind; }
}
internal bool Debug {
get { return debug; }
}
internal string Language {
get { return language; }
}
internal string Program {
get { return program; }
}
internal ArrayList Assemblies {
get {
if (appAssemblyIndex != -1) {
object o = assemblies [appAssemblyIndex];
assemblies.RemoveAt (appAssemblyIndex);
assemblies.Add (o);
appAssemblyIndex = -1;
}
return assemblies;
}
}
internal ArrayList Dependencies {
get { return dependencies; }
}
internal string PrivateBinPath {
get {
if (privateBinPath != null)
return privateBinPath;
AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
privateBinPath = setup.PrivateBinPath;
if (!Path.IsPathRooted (privateBinPath)) {
string appbase = setup.ApplicationBase;
if (appbase.StartsWith ("file://")) {
appbase = appbase.Substring (7);
if (Path.DirectorySeparatorChar != '/')
appbase = appbase.Replace ('/', Path.DirectorySeparatorChar);
}
privateBinPath = Path.Combine (appbase, privateBinPath);
}
return privateBinPath;
}
}
internal string BaseDir {
get {
if (baseDir == null)
baseDir = context.Request.MapPath (BaseVirtualDir);
return baseDir;
}
}
internal virtual string BaseVirtualDir {
get {
if (baseVDir == null)
baseVDir = UrlUtils.GetDirectory (context.Request.FilePath);
return baseVDir;
}
}
internal CompilationConfiguration CompilationConfig {
get {
if (compilationConfig == null)
compilationConfig = CompilationConfiguration.GetInstance (context);
return compilationConfig;
}
}
}
}
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