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使用pdfkit並且可以成功將pdf上傳到S3一次。但如果再次嘗試，則會引發此錯誤。錯誤：使用pdfkit結束後寫入
Error: write after end
at writeAfterEnd (_stream_writable.js:220:12)
at PDFReference.Writable.write (_stream_writable.js:271:5)
at PDFPage.write (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/page.js:95:27)
at PDFDocument.addContent (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/document.js:161:17)
at PDFDocument.save (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/mixins/vector.js:19:19)
at PDFDocument._fragment (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/mixins/text.js:257:12)
at PDFDocument._line (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/mixins/text.js:203:12)
at emitThree (events.js:140:20)
at LineWrapper.emit (events.js:216:7)
at /Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/line_wrapper.js:141:17
at LineWrapper.wrap (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/line_wrapper.js:207:9)
at PDFDocument._text (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/mixins/text.js:48:17)
at PDFDocument.text (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/pdfkit/js/mixins/text.js:59:19)
at /Users/jonathancorrin/Desktop/workspace/rent-app/server/routes/image-upload.js:36:6
at Layer.handle [as handle_request] (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/layer.js:95:5)
at /Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:281:22
at Function.process_params (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:335:12)
at next (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:275:10)
at Function.handle (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:174:3)
at router (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:47:12)
at Layer.handle [as handle_request] (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:317:13)
at /Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:284:7
at Function.process_params (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:335:12)
at next (/Users/jonathancorrin/Desktop/workspace/rent-app/node_modules/express/lib/router/index.js:275:10)
我不確定是什麼原因導致此錯誤。這裏是我的服務器端代碼
var express = require('express');
var router = express.Router();
var aws = require('aws-sdk');
var fs = require('fs');
var path = require('path');
var path3 = path.join(__dirname, "../config/config-aws.json");
var pdf = require('pdfkit');
var multer = require('multer');
var multerS3 = require('multer-s3');
var doc = new pdf;
aws.config.loadFromPath(path3);
var s3 = new aws.S3();
var fileName = '';
var uploadM = multer({
storage: multerS3({
s3: s3,
bucket: 'XXXX',
acl: 'public-read',
metadata: function (req, file, cb) {
cb(null, {fieldName: file.fieldname});
},
key: function (req, file, cb) {
fileName = Date.now().toString() + "-" + (Math.round(Math.random() * 10000000000000000)).toString() + '-' + file.originalname;
cb(null, fileName)
}
})
});
router.post('/upload/contract', function (req,res) {
doc.fontSize(21)
.text(req.body.contractType, 240, 50);
doc.fontSize(15)
.text(req.body.text, 100, 100)
.text(req.body.text2, 100, 280);
doc.end();
var params = {
Key: req.body.fileName,
Body: doc,
Bucket: 'XXXX',
ACL: 'public-read',
contentType: 'application/pdf'
};
s3.upload(params, function (err, response) {
if (err) {
return res.status(400).json({
message: "Error uploading pdf",
error: err.stack
});
}
return res.status(200).json({
title: "PDF uploaded successfully",
obj: response
});
});
});
它與doc.end（）有關，但我不知道究竟是什麼。 這是我提出請求的客戶端代碼。
onReturnPDF(html: string, fileName: string, contractType: string, html2: string) {
const body = {
fileName: fileName,
text: html,
contractType: contractType,
text2: html2
};
return this.http.post(this.devUrl + '/upload/contract', body)
.shareReplay()
}
任何人都知道我該如何解決這個問題？
您的文檔是全球性的，我認爲您可以在調用結束後潤飾它。嘗試在你的處理程序中使用新的pdf。 – T4rk1n