OneScript/src/oscript/CgiBehavior.cs at develop · ivtroitskiy/OneScript · GitHub

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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using OneScript.Contexts;

using OneScript.Exceptions;

using OneScript.StandardLibrary;

using oscript.Web;

using ScriptEngine.HostedScript;

using ScriptEngine.Hosting;

using ScriptEngine.Machine;

using ScriptEngine.Machine.Contexts;

namespace oscript

{

internal class CgiBehavior : AppBehavior, IHostApplication, IRuntimeContextInstance, IAttachableContext

{

private static readonly ContextMethodsMapper<CgiBehavior> _methods = new ContextMethodsMapper<CgiBehavior>();

private readonly HashSet<string> _headersWritten = new HashSet<string>(StringComparer.OrdinalIgnoreCase);

private bool _isContentEchoed;

public CgiBehavior()

{

Encoding = new UTF8Encoding();

}

public override int Execute()

{

var scriptFile = Environment.GetEnvironmentVariable("SCRIPT_FILENAME") ?? Environment.GetEnvironmentVariable("PATH_TRANSLATED");

if (scriptFile == null)

{

Header("Content-type", "text/plain");

Echo("No CGI Variables found");

return 1;

}

if (!File.Exists(scriptFile))

{

Header("Content-type", "text/plain");

Echo($"Script file not found: {scriptFile}");

return 1;

}

return RunCGIMode(scriptFile);

}

private int RunCGIMode(string scriptFile)

{

var builder = ConsoleHostBuilder

.Create(scriptFile);

builder.SetupEnvironment(e =>

{

e.AddAssembly(GetType().Assembly);

});

var engine = ConsoleHostBuilder.Build(builder);

var request = new WebRequestContext();

engine.InjectGlobalProperty("ВебЗапрос", "WebRequest", request, true);

engine.InjectObject(this);

var source = engine.Loader.FromFile(scriptFile);

Process process;

try

{

process = engine.CreateProcess(this, source);

}

catch (Exception e)

{

ShowExceptionInfo(e);

return 1;

}

var exitCode = process.Start();

if (!_isContentEchoed)

Echo("");

request.Dispose();

return exitCode;

}

public void OnAttach(out IVariable[] variables, out BslMethodInfo[] methods)

{

variables = Array.Empty<IVariable>();

methods = this.GetMethods().ToArray();

}

#region CGIHost

[ContextMethod("ВывестиЗаголовок", "Header")]

public void Header(string header, string value)

{

if (_isContentEchoed)

throw new InvalidOperationException("Headers can not be written after the main content");

Output(header + ": " + value + "\r\n");

_headersWritten.Add(header);

}

[ContextMethod("ОтправитьФайл", "SendFile")]

public void SendFile(string filePath, string downloadFileName = null)

{

if (_isContentEchoed)

throw new InvalidOperationException("Content already sent!");

if (!IsHeaderWritten("Content-type"))

Header("Content-type", "application/octet-stream");

if (string.IsNullOrEmpty(downloadFileName))

{

var finfo = new FileInfo(filePath);

downloadFileName = finfo.Name;

}

using (var fs = new FileStream(filePath, FileMode.Open))

{

Header("Content-disposition", $"inline; filename=\"{downloadFileName}\"");

Header("Content-length", fs.Length.ToString());

oscript.Output.WriteLine();

using (var stdout = Console.OpenStandardOutput())

{

fs.CopyTo(stdout);

}

public Encoding Encoding { get; set; }

private bool IsHeaderWritten(string header)

{

return _headersWritten.Contains(header);

}

public void Echo(string str, MessageStatusEnum status = MessageStatusEnum.Ordinary)

{

if (!_isContentEchoed)

{

if (!IsHeaderWritten("Content-type"))

Header("Content-type", "text/html");

if (!IsHeaderWritten("Content-encoding"))

Header("Content-encoding", Encoding.BodyName);

oscript.Output.WriteLine();

_isContentEchoed = true;

}

if (str != "")

{

Output(str);

oscript.Output.WriteLine();

}

private void Output(string str)

{

using (var stream = Console.OpenStandardOutput())

{

var bytes = Encoding.GetBytes(str);

stream.Write(bytes, 0, bytes.Length);

}

public void ShowExceptionInfo(Exception exc)

{

Echo(exc.ToString());

}

public bool InputString(out string result, string prompt, int maxLen, bool multiline)

{

result = null;

return false;

}

public string[] GetCommandLineArguments()

{

return new string[0];

}

#endregion

#region IRuntimeContextInstance Members

public bool IsIndexed => false;

public bool DynamicMethodSignatures => false;

public IValue GetIndexedValue(IValue index)

{

throw new NotImplementedException();

}

public void SetIndexedValue(IValue index, IValue val)

{

throw new NotImplementedException();

}

public int GetPropertyNumber(string name)

{

throw PropertyAccessException.PropNotFoundException(name);

}

public bool IsPropReadable(int propNum)

{

return false;

}

public bool IsPropWritable(int propNum)

{

return false;

}

public IValue GetPropValue(int propNum)

{

throw new ArgumentException();

}

public void SetPropValue(int propNum, IValue newVal)

{

throw new InvalidOperationException("global props are not writable");

}

public int GetMethodNumber(string name)

{

return _methods.FindMethod(name);

}

public BslMethodInfo GetMethodInfo(int methodNumber)

{

return _methods.GetRuntimeMethod(methodNumber);

}

public BslPropertyInfo GetPropertyInfo(int propertyNumber)

{

throw new NotImplementedException();

}

public void CallAsProcedure(int methodNumber, IValue[] arguments)

{

_methods.GetCallableDelegate(methodNumber)(this, arguments);

}

public void CallAsFunction(int methodNumber, IValue[] arguments, out IValue retValue)

{

retValue = _methods.GetCallableDelegate(methodNumber)(this, arguments);

}

public int GetPropCount()

{

return 0;

}

public string GetPropName(int propNum)

{

throw new NotImplementedException();

}

public int GetMethodsCount()

{

return _methods.Count;

}

#endregion

}

OneScript/src/oscript/CgiBehavior.cs at develop · ivtroitskiy/OneScript · GitHub

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