Execute VBS from Nodejs in background mode (Tasks Scheduler or Windows Service)

问题

I'm trying to convert an Excel File to PDF from a NodeJS App. It works when I start Node in command line, but when I start my app.bat as Windows Service through NSSM or directly with the Tasks Scheduler, it doesn't work anymore.

With the script bellow, I can only see the first row in the log.txt which is the program arguments. If everything was going well, I should see 0, then 1, and 2. Sadly, when Node runs in background, I don't have any number, so i'm guessing the problem is CreateObject("Excel.Application") but i don't know why and how to resolve it.

VBScript :

    Set objFSO=CreateObject("Scripting.FileSystemObject")
    outFile="C:\Users\admin\Documents\Projects\tools\log.txt"
    Set objFile = objFSO.CreateTextFile(outFile,True)
    objFile.Write Wscript.Arguments.Item(0) & " | " & WScript.Arguments.Item(1) & vbCrLf

    Dim oExcel
    Set oExcel = CreateObject("Excel.Application")
    Dim oBook

    objFile.Write "0" & vbCrLf
    Set oBook = oExcel.Workbooks.Open(Wscript.Arguments.Item(0))

    objFile.Write "1" & vbCrLf
    oBook.ExportAsFixedFormat xlTypePDF, WScript.Arguments.Item(1)

    objFile.Write "2" & vbCrLf
    oBook.Close True

NodeJS:

    const {exec} = require('child_process');
    exec('"' + Meteor.settings.directories.tools + 'convertToPDF.vbs" "' + outputServerFilePathChild + '.xlsx" "' + outputServerFilePathChild + '.pdf"', (err, stdout, stderr) => {
      if (err) {
        console.log(stderr);
        reject(new Error(stderr));
      } else {
        if (fs.existsSync(outputServerFilePathChild.replace(/ /g, "%20") + ".pdf")) {
          console.log('rename "' + outputServerFilePathChild.replace(/ /g, "%20") + '.pdf" "' + outputServerFilePathChild + '.pdf"');
          exec('rename "' + outputServerFilePathChild.replace(/ /g, "%20") + '.pdf" "' + outputServerFilePathChild + '.pdf"', (err, stdout, stderr) => {
            console.log("File generated: " + outputServerFilePathChild + ".pdf");
                    resolve(outputClientFilePathChild + ".pdf");
                  });
        } else {
          console.log("File generated: " + outputServerFilePathChild + ".pdf");
          resolve(outputClientFilePathChild + ".pdf");
        }
      }
    });

I also tried things like this :

    const child2 = spawn('start', [
                '"PDFConverter"',
                'cscript',
                '"C:\\Users\\admin\\Documents\\Projects\\tools\\convertToPDF.vbs"',
                '"C:\\Users\\admin\\Documents\\Projects\\reports\\admin\\rebates\\customer1 2019-09-30.xlsx"',
                '"C:\\Users\\admin\\Documents\\Projects\\reports\\admin\\rebates\\customer1 2019-09-30.pdf"'
            ], {
                shell: true,
                windowsHide: true,
            });

However, it's not working either. Does someone have an idea ?

EDIT: This problem seems unresolvable. Some people have asked the same question many years ago, and there is still no answer ...

Node.js as service, exec doesn't work
nodejs service -in windows system ,unable to execute jar files

来源：https://stackoverflow.com/questions/58750660/execute-vbs-from-nodejs-in-background-mode-tasks-scheduler-or-windows-service

标签

node.js

vbscript

child-process

background-task