react-native在android上上传图片 [英] react-native upload pictures on android
本文介绍了react-native在android上上传图片的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在 Android 上有一个 react-native 应用程序和一个用 NodeJS + Express 编写的后端服务器,我正在使用 multer 来处理文件上传.
I have a react-native app on Android and a backend server written in NodeJS + Express and I'm using multer to handle file uploads.
const multer = require('multer');
const mime = require('mime');
const crypto = require('crypto');
const storage = multer.diskStorage({
destination: (req, file, cb) => cb(null, config.uploads),
filename: (req, file, cb) => {
crypto.pseudoRandomBytes(16, (err, raw) => {
cb(null, raw.toString('hex') + Date.now() + '.' + mime.extension(file.mimetype));
});
}
});
const upload = multer({ storage });
const Router = require('express').Router;
const controller = require('./upload.controller');
const router = new Router();
const auth = require('./../../auth/auth.service');
router.post('/', [auth.isAuthenticated(), upload.any()], controller.create);
module.exports = router;
在我的 react-native 应用程序中,我尝试这样做:
And on my react-native app I try to do like this:
ImagePicker.launchCamera(options, image => {
let { uri } = image
const API_URL = 'http://192.168.1.2:9000/api/uploads'
var form = new FormData();
form.append("FormData", true)
form.append("access_token", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjU3YjgyZGQ2MTEwZDcwYmEwYjUxZjM5YyIsImlzTWVkaWMiOnRydWUsImlhdCI6MTQ3MTY4ODE1MiwiZXhwIjoxNDcxNzA2MTUyfQ.gPeql5g66Am4Txl1WqnbvOWJaD8srTK_6vihOJ6kFbY")
form.append("Content-Type", "image/jpg")
form.append('image', uri)
fetch(API_URL, {body: form, mode: "FormData", method: "post", headers: {"Content-Type": "multipart/form-data"}})
.then((response) => console.log(response))
.catch((error) => {
console.log("ERROR " + error)
})
.then((responseData) => {
console.log("Succes "+ responseData)
})
.done();
})
但是当我尝试上传时,我收到以下错误
But when I try to upload I recive the following error
multipart body 必须至少有一个部分
multipart body must have at least one part
我做错了什么?
有人知道更好的解决方案吗?
Does anybody knows a better solution to do this?
推荐答案
Fetch 目前可能不支持 Blob 和 FormData,但您可以使用 XMLHttpRequest
polyfill 代替.
Fetch may not support Blob and FormData at this moment, but you can use XMLHttpRequest
polyfill instead.
let xhr = new XMLHttpRequest()
xhr.open('post', `http://myserver.com/upload-form`)
xhr.send(form)
xhr.onerror = function(e) {
console.log('err', e)
}
xhr.onreadystatechange = function() {
if(this.readyState === this.DONE) {
console.log(this.response)
}
}
这篇关于react-native在android上上传图片的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文