Question

在我的NodeJS应用程序中，我必须修改PDF文件以生成合同。在本地方面，它工作正常，但是当我将其部署到数字海洋或heroku时，他们给了我错误：

2018-07-19T13:08:30.827782+00:00 app[web.1]: (node:4) UnhandledPromiseRejectionWarning: TypeError: Unable to modify PDF file, make sure that output file target is available and that it is not protected

controller.js

const pdfGenerator = require('../handlers/pdfGenerator');
const mail = require("../handlers/mailer");
const hummus = require('hummus');
const path = require('path');
const moment = require('moment');
moment.locale('nl');

exports.generatePCFContract = async (req, res, next) => {
  const debitor = req.body.debitor;
  const dates = req.body.dates;
  const options = req.body.options;
  const locations = req.body.locations;
  const data = {
    company: debitor.company,
    street: debitor.street,
    city: `${debitor.zippcode} ${debitor.city.toUpperCase()}`,
    country: debitor.country,
    starting_date: await moment(dates.starting_date).format('D MMMM YYYY'),
    fee: `€ ${locations[0].fee}`,
    contract_duration: dates.contract_duration
  }

  res.setHeader("Content-Type", "application/pdf"); 
  const pdfWriter = hummus.createWriterToModify(new hummus.PDFRStreamForFile('./templates/pcfcontract.pdf'), new hummus.PDFStreamForResponse(res))

  const focoFont = pdfWriter.getFontForFile('./templates/fonts/foco_lt.ttf');
  const textOptions = {font:focoFont,size:9,colorspace:'gray',color:0x00}

  // Edit page 1 with the debitor info
  const pageModifier = new hummus.PDFPageModifier(pdfWriter,0);
  pageModifier.startContext().getContext()
    .writeText(data.company,235, 643, textOptions)
    .writeText(data.street, 235, 630, textOptions)
    .writeText(data.city, 235, 617, textOptions)
    .writeText(data.country, 235, 604, textOptions);
  pageModifier.endContext().writePage();

  const page3Modifier = new hummus.PDFPageModifier(pdfWriter,2);
  page3Modifier.startContext().getContext()
    .writeText(data.contract_duration, 225, 626, textOptions)
    .writeText(data.fee, 191, 228, textOptions);
  page3Modifier.endContext().writePage();

  const page5Modifier = new hummus.PDFPageModifier(pdfWriter, 4);
  page5Modifier.startContext().getContext()
    .writeText(data.starting_date, 310, 720, textOptions)
    .writeText(data.contract_duration, 459, 706, textOptions)
  page5Modifier.endContext().writePage();

  // const filepath = await pdfGenerator.pcfContract(data);
  // res.filepath = filepath;
  await pdfWriter.end();
  next();
}

我真的在这上面呆了几天，所以我希望有人能告诉我我现在正在犯哪个错误。

无法在部署NodeJS上阅读我的pdf文件

0 个答案: