Sendgrid-nodejs: attachment in mails have 0 bytes

Hello @prasoojalan,

It sounds like you either have a problem with the path to the file or the file encoding. I would double check the values of excelFile.* in your code to ensure the file exists. Then, I would ensure that the file itself is base64 encoded correctly. Maybe this tool can help with the latter.

With Best Regards,

Elmer

Hello @ Elmer

My full code for creating and sending file is as -
I tried giving one attachment root path , but it also did not worked. The same excel file generated , is successfully downloaded in browser .... what code I am missing or I am unable to understand the concept properly... can you help me out..

In createExcelFile function with "C" as parameter, I am returning the workbook where as not in other cases.

exports.getExcelFile = (req, res, next) => {
   const excelFile = {};

   Order.findById(req.params.id).then(order => {
      excelFile.excelOffFile = "Off_" + order.factory + "_" + order._id + ".xls";
      excelFile.excelOffFilePath = path.join("data", "excel", excelFile.excelOffFile);
      excelFile.excelFactFile = "Fact_" + order.factory + "_" + order._id + ".xls";
      excelFile.excelFactFilePath = path.join("data", "excel", excelFile.excelFactFile);
      excelFile.excelBrFile = "Br_" + order.factory + "_" + order._id + ".xls";
      excelFile.excelBrFilePath = path.join("data", "excel", excelFile.excelBrFile);
      excelFile.excelSuFile = "Su_" + order.factory + "_" + order._id + ".xls";
      excelFile.excelSuFilePath = path.join("data", "excel", excelFile.excelSuFile);

      let workbookFinal = createExcelFile(order, "C", excelFile.excelOffFilePath);

      createExcelFile(order, "F", excelFile.excelFactFilePath);
      createExcelFile(order, "B", excelFile.excelBrFilePath);
      createExcelFile(order, "S", excelFile.excelSuFilePath);
sgMail.send({
         to: config.get("mail.defaultAdd"),
         from: defaultMailId,
         subject: "Order with excel attachment send through software ",
         html: `<h1>
         The mail has been sent as trial through program for testing excel file attachement  .
         </h1>
         <h3>
            Office file - ${url.format({ protocol: req.protocol, host: req.get("host"), pathname: "orders/genExcelFile/" + excelFile.excelOffFile })}</br>
            Fact file - ${url.format({ protocol: req.protocol, host: req.get("host"), pathname: "orders/genExcelFile/" + excelFile.excelFactFile })}</br>
            Br file - ${url.format({ protocol: req.protocol, host: req.get("host"), pathname: "orders/genExcelFile/" + excelFile.excelBrFile })}</br>
            Su file - ${url.format({ protocol: req.protocol, host: req.get("host"), pathname: "orders/genExcelFile/" + excelFile.excelSuFile })}</br>
         </h3>
         `,
         attachments: [
            {
               content: fs.readFileSync(path.join(rootDir.rootDir, excelFile.excelOffFilePath), { encoding: "base64" }),
               filename: excelFile.excelOffFile,
            },
            {
               content: fs.readFileSync(excelFile.excelFactFilePath, { encoding: "base64" }),
               filename: excelFile.excelFactFile,
            },
            {
               content: fs.readFileSync(excelFile.excelBrFilePath, { encoding: "base64" }),
               filename: excelFile.excelBrFile,
            },
            {
               content: fs.readFileSync(excelFile.excelSuFilePath, { encoding: "base64" }),
               filename: excelFile.excelSuFile,
            }
         ]
      }).then(result => {
         console.log("mail sent successfully...");
      }).catch(err => console.log(err));

      res.setHeader("Content-Type", "application/vnd.ms-excel");
      res.setHeader("Content-Disposition", "attachment;filename='" + excelFile.excelOffFile + "'");
      workbookFinal.xlsx.write(res).then(() => {
         res.end();
      });

}).catch(err => console.log(err));
};

Hello @Elmer

Thanks for your suggestion, it helped me understanding the flow of my code which was puzzling me a lot.
I figure out my mistake and solved it. My code generated excel file with no records by the time mail was sent. So , I removed my mail code from the function and created a separate function and then called the function after the getExcelFile function. This way I was sure that the files were created and the file were attached correctly.

Once again thanks a lot for helping me focus on my code before raising any further questions.

With Best Regards,

Prasoon Kumar Jalan