Question

我在经典ASP中使用IIS 7.5运行一个带有独立应用程序池（ApplicationPoolIdentity）的网站。在这个网站里面，我还通过“WScript.Shell”对象运行方法运行非托管代码（wkhtmltopdf.exe）。之后，我将结果文件流式传输为pdf

set wshell = CreateObject("WScript.Shell") 
wshell.run wkhtmltopdf.exe  http://www.mypagehanging.com c:\myfile.pdf", 0, TRUE 
set wshell = nothing

一切正常但有时我的网站挂起。它完全卡住了。在应用程序池（iis apppool \ myapp）的标识下运行的wktmltopdf.exe挂起。

这导致我的所有网站都挂起，因为我运行选项bWaitOnReturn为true的程序。

我无法将此选项设置为false，因为我必须等待脚本在流式传输pdf之前完全执行。

无法找到任何超时选项以提供给wkhtmltopdf。无法理解为什么wkhtmltopdf挂了。但它可能是由我试图渲染的网站而不是wkhtmltopdf引起的。

有什么建议吗？

Answer 1

如果需要花费不寻常的时间来运行，我已经解决了这个问题。

这是我的代码应该对某人有帮助。

在asp文件中

'Run this programm that will kill pdf generation if it hangs-execute for more than 10seconds
wshell.run "KillProcess.exe -p wkhtmltopdf -t 10000",0,FALSE 
'Launch pdf generation with bwaitonreturn true 
wshell.run wkhtmltopdf.exe  http://www.mypagehanging.com  c:\inetpub\wwwroot\myfile.pdf", 0, TRUE 

'Stream the pdf ...

KillProcess.exe的代码源

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Diagnostics;
using CommandLine; //http://commandline.codeplex.com
using CommandLine.Text; //http://commandline.codeplex.com

namespace KillProcess
{
    class Program
    {
        static void Main(string[] args)
        {
            var options = new Options();
            ICommandLineParser parser = new CommandLineParser();

            if (parser.ParseArguments(args, options))
            {
                double maxWaitTime = options.time; //ms
                string processName = options.process;
                bool exit;
                do
                {
                    exit = true;
                    foreach (Process p in GetProcesses(processName))
                    {
                        exit = false;
                        try
                        {
                            if (p.StartTime.AddMilliseconds(maxWaitTime) < DateTime.Now)
                            {
                                p.Kill();
                                Console.WriteLine("Killed Process: {0} ID: {1} started at {2} after {3}ms of execution time", p.ProcessName, p.Id, p.StartTime, options.time);
                            }
                        }
                        catch (Exception e)
                        {
                            Console.WriteLine(e.Message);
                        }
                    }
                    Thread.Sleep(100);
                } while (!exit);
                return;
            }
            else
            {
                Console.WriteLine(options.GetUsage());
                return;
            }
        }

        static IEnumerable<Process> GetProcesses(string processName)
        {
            var processes = from p in Process.GetProcesses()
                            where p.ProcessName == processName
                            orderby p.ProcessName
                            select p;
            return processes;
        }

        class Options : CommandLineOptionsBase
        {
            [Option("p", "process", Required = true, HelpText = "Name of the process-es to kill after some execution time (Warning ! This will kill all the processes that match the name !)")]
            public string process { get; set; }

            [Option("t", "time", Required = true, HelpText = "Maximum execution time allowed for the process to run. If the process has run for more than this amount of time it will be killed")]
            public int time { get; set; }

            [HelpOption]
            public string GetUsage()
            {
                return HelpText.AutoBuild(this, (HelpText current) => HelpText.DefaultParsingErrorsHandler(this, current));
            }
        }
    }
}

应用程序池在其他exe运行时停止运行

1 个答案: