public async Task <Run> HandleRequest(HttpContext httpContext)
{
await _initSemaphoreSlim.WaitAsync();
try
{
if (Initialized)
{
await httpContext.Response.WriteError("Cannot initialize the action more than once.");
Console.Error.WriteLine("Cannot initialize the action more than once.");
return(new Run(Type, Method, Constructor, AwaitableMethod));
}
string body = await new StreamReader(httpContext.Request.Body).ReadToEndAsync();
JObject inputObject = JObject.Parse(body);
if (!inputObject.ContainsKey("value"))
{
await httpContext.Response.WriteError("Missing main/no code to execute.");
return(null);
}
JToken message = inputObject["value"];
if (message["main"] == null || message["binary"] == null || message["code"] == null)
{
await httpContext.Response.WriteError("Missing main/no code to execute.");
return(null);
}
string main = message["main"].ToString();
bool binary = message["binary"].ToObject <bool>();
if (!binary)
{
await httpContext.Response.WriteError("code must be binary (zip file).");
return(null);
}
string[] mainParts = main.Split("::");
if (mainParts.Length != 3)
{
await httpContext.Response.WriteError("main required format is \"Assembly::Type::Function\".");
return(null);
}
string base64Zip = message["code"].ToString();
string tempPath = Path.Combine(Environment.CurrentDirectory, Guid.NewGuid().ToString());
string tempFile = Path.GetTempFileName();
await File.WriteAllBytesAsync(tempFile, Convert.FromBase64String(base64Zip));
try
{
System.IO.Compression.ZipFile.ExtractToDirectory(tempFile, tempPath);
}
catch (Exception)
{
await httpContext.Response.WriteError("Unable to decompress package.");
return(null);
}
finally
{
File.Delete(tempFile);
}
Environment.CurrentDirectory = tempPath;
string assemblyFile = $"{mainParts[0]}.dll";
string assemblyPath = Path.Combine(tempPath, assemblyFile);
if (!File.Exists(assemblyPath))
{
await httpContext.Response.WriteError($"Unable to locate requested assembly (\"{assemblyFile}\").");
return(null);
}
try
{
Assembly assembly = Assembly.LoadFrom(assemblyPath);
Type = assembly.GetType(mainParts[1]);
if (Type == null)
{
await httpContext.Response.WriteError($"Unable to locate requested type (\"{mainParts[1]}\").");
return(null);
}
Method = Type.GetMethod(mainParts[2]);
Constructor = Type.GetConstructor(Type.EmptyTypes);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.ToString());
await httpContext.Response.WriteError(ex.Message
#if DEBUG
+ ", " + ex.StackTrace
#endif
);
return(null);
}
if (Method == null)
{
await httpContext.Response.WriteError($"Unable to locate requested method (\"{mainParts[2]}\").");
return(null);
}
if (Constructor == null)
{
await httpContext.Response.WriteError($"Unable to locate appropriate constructor for (\"{mainParts[1]}\").");
return(null);
}
Initialized = true;
AwaitableMethod = (Method.ReturnType.GetMethod(nameof(Task.GetAwaiter)) != null);
return(new Run(Type, Method, Constructor, AwaitableMethod));
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.StackTrace);
await httpContext.Response.WriteError(ex.Message
#if DEBUG
+ ", " + ex.StackTrace
#endif
);
Startup.WriteLogMarkers();
return(null);
}
finally
{
_initSemaphoreSlim.Release();
}
}