Basic example of fetch api + expressjs/multer using files and text fields
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July 20, 2020 08:36
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Basic example of fetch api + expressjs/multer using files and text fields
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| <html> | |
| <head></head> | |
| <body> | |
| <input type="file" /> | |
| <button>Go</button> | |
| <script> | |
| document.querySelector("button").addEventListener("click", async () => { | |
| const formData = new FormData(); | |
| formData.append("myFile", document.querySelector("input[type=file]").files[0]); | |
| formData.append("title", "some file title") | |
| formData.append("another-text-field", "another text field value") | |
| const r = await fetch("/dumprequest", { | |
| method: "POST", | |
| body: formData | |
| }); | |
| console.log(r.json()); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| { | |
| "name": "express-multer", | |
| "version": "1.0.0", | |
| "main": "index.js", | |
| "author": "Bnaya Peretz", | |
| "license": "MIT", | |
| "dependencies": { | |
| "express": "^4.17.1", | |
| "multer": "^1.4.2", | |
| "start": "node server.js" | |
| } | |
| } |
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| const app = require("express")(); | |
| const multerMiddlewareFactory = require("multer"); | |
| const path = require("path"); | |
| const multerMiddleware = multerMiddlewareFactory(); | |
| app.post("/dumprequest", multerMiddleware.fields([{name: "myFile", maxCount: 1}]), (req, res) => { | |
| try { | |
| const file = {...req.files["myFile"][0]} | |
| file.buffer = undefined; | |
| file.size = req.files["myFile"][0].buffer.length; | |
| const dump = { | |
| textFields: req.body, | |
| files: [file] | |
| }; | |
| res.send(dump); | |
| } catch (error) { | |
| res.status(500).send(error); | |
| } | |
| }); | |
| app.get("/", (req, res) => { | |
| res.sendFile(path.resolve(__dirname, "./index.html")); | |
| }); | |
| app.listen(8888, (error) => { | |
| if (error) { | |
| console.error(error); | |
| } else { | |
| console.log("server up"); | |
| } | |
| }); |
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