如何使用jsreport和jsreport Chrome Pdf渲染1k pdf文件？

我正在尝试使用Express.js和端点生成1k报告，我在JSON中传递一个数组，API遍历它并在forEach循环中，然后每个对象用于废弃门户网站，获取响应，并创建一个PDF文件......

这种方法是伪工作，但我很确定存在一些并发问题...因为，如果我在JSON数组中传递2个项目，API可以创建2个PDF文件而没有问题，但是如果我传递300个API随机创建50 ...或60或120。

这是我的jsreport配置

const jsReportConfig = {
  extensions: {
    "chrome-pdf": {
      launchOptions: {
        timeout: 10000,
        args: ['--no-sandbox', '--disable-setuid-sandbox'],
      },
    },
  },
  tempDirectory: path.resolve(__dirname, './../../temporal/pdfs'),
  templatingEngines: {
    numberOfWorkers: 4,
    timeout: 180000,
    strategy: 'http-server',
  },
};

我像这样设置了jsreport实例

jsreport.use(jsReportChrome());
jsreport.use(jsReportHandlebars());
jsreport.init()

而且，这是我呈现报告的方式，checkInvoiceStatus函数用作HTTP调用，返回在Handlebars模板中注入的HTML响应。

const renderReports = (reporter, invoices) => new Promise(async (resolve, reject) => {
    try {
      const templateContent = await readFile(
        path.resolve(__dirname, './../templates/hello-world.hbs'),
        'utf-8',
      );
      invoices.forEach(async (invoice) => {
        try {
          const response = await checkInvoiceStatus(invoice.re, invoice.rr, invoice.id)
          const $ = await cheerio.load(response);
          const reporterResponse = await reporter.render({
            template: {
              content: templateContent,
              engine: 'handlebars',
              recipe: 'chrome-pdf',
              name: 'PDF Validation',
              chrome: {
                displayHeaderFooter: true,
                footerTemplate: '<table width=\'100%\' style="font-size: 12px;"><tr><td width=\'33.33%\'>{#pageNum} de {#numPages}</td><td width=\'33.33%\' align=\'center\'></td><td width=\'33.33%\' align=\'right\'></td></tr></table>',
              },
            },
            data: {
              taxpayerId: 'CAC070508MY2',
              captcha: $('#ctl00_MainContent_ImgCaptcha').attr('src'),
              bodyContent: $('#ctl00_MainContent_PnlResultados').html(),
            },
          });
          reporterResponse.result.pipe(fs.createWriteStream(`./temporal/validatedPdfs/${invoice.id}.pdf`));
        } catch (err) {
          console.error(err);
          reject(new Error(JSON.stringify({
            code: 'PORTAL-PDFx001',
            message: 'The server could not retrieve the PDF from the portal',
          })));
        }
      });
      resolve();
    } catch (err) {
      console.error(err);
      reject(new Error(JSON.stringify({
        code: 'PORTAL-PDFx001',
        message: 'The server could not retrieve the PDF from the portal',
      })));
    }
  });

我不知道为什么，但这个功能在500ms内终止，但文件是在1分钟后创建的......

app.post('/pdf-report', async (req, res, next) => {
  const { invoices } = req.body;
  repository.renderReports(reporter, invoices)
    .then(() => res.status(200).send('Ok'))
    .catch((err) => {
      res.status(500).send(err);
    });
});

UPDATE

除了@hurricane提供的代码之外，我还必须将jsReport配置更改为此

const jsReportConfig = {
  chrome: {
    timeout: 180000,
    strategy: 'chrome-pool',
    numberOfWorkers: 4
  },
  extensions: {
    'chrome-pdf': {
      launchOptions: {
        timeout: 180000,
        args: ['--no-sandbox', '--disable-setuid-sandbox'],
        ignoreDefaultArgs: ['--disable-extensions'],
      },
    },
  },
  tempDirectory: path.resolve(__dirname, './../../temporal/pdfs'),
  templatingEngines: {
    numberOfWorkers: 4,
    timeout: 180000,
    strategy: 'http-server',
  },
};

我认为在你的结构中使用writeFileSync函数而不是使用writeStream很容易解决你的问题。但这并不意味着它是最好的方法。因为您必须等待每个渲染并且每个写入文件进程都要启动另一个渲染。所以我建议使用Promise.all，你可以同时运行你的长进程。这意味着您将只等待最长的过程。

快速获胜 - 慢速过程

reporterResponse.result.pipe 

用这个改变这一行

   fs.createFileSync(`./temporal/validatedPdfs/${invoice.id}.pdf`);

更好的方法 - 快速的过程

const renderReports = (reporter, invoices) => new Promise(async (resolve, reject) => {
  try {
    const templateContent = await readFile(
      path.resolve(__dirname, './../templates/hello-world.hbs'),
      'utf-8',
    );
    const renderPromises = invoices.map((invoice) => {
      const response = await checkInvoiceStatus(invoice.re, invoice.rr, invoice.id)
      const $ = await cheerio.load(response);
      return await reporter.render({
        template: {
          content: templateContent,
          engine: 'handlebars',
          recipe: 'chrome-pdf',
          name: 'PDF Validation',
          chrome: {
            displayHeaderFooter: true,
            footerTemplate: '<table width=\'100%\' style="font-size: 12px;"><tr><td width=\'33.33%\'>{#pageNum} de {#numPages}</td><td width=\'33.33%\' align=\'center\'></td><td width=\'33.33%\' align=\'right\'></td></tr></table>',
          },
        },
        data: {
          taxpayerId: 'CAC070508MY2',
          captcha: $('#ctl00_MainContent_ImgCaptcha').attr('src'),
          bodyContent: $('#ctl00_MainContent_PnlResultados').html(),
        },
      });
    });
    const renderResults = await Promise.all(renderPromises);
    const filewritePromises = results.map(renderedResult => await fs.writeFile(`./temporal/validatedPdfs/${invoice.id}.pdf`, renderedResult.content));
    const writeResults = await Promise.all(filewritePromises);
    resolve(writeResults);
  } catch (err) {
    console.error(err);
    reject(new Error(JSON.stringify({
      code: 'PORTAL-PDFx001',
      message: 'The server could not retrieve the PDF from the portal',
    })));
  }
});