我正在尝试从Gallery / Camera上传图片。我的后端是Nodejs。我能够上传一个文件，但它似乎不是一个jpeg.It看起来像一个没有任何扩展名的编码文件，我得到这个错误：
{ “代码”：3， “源极”： “文件：///storage/emulated/0/Android/data/io.ionic.starter/cache/1526315072575.jpg”， “目标”：“{{ 3}}“，”http_status“：null，”body“：null，”exception“：”com.android.okhttp.Address@cff2e20a上的意外流结束“}
这是Node Js：
var express = require('express');
var path = require('path');
var logger = require('morgan');
var bodyParser = require('body-parser');
var app = express();
var server = require('http').Server(app);
var mongoose = require('mongoose'); // mongoose for mongodb
var port = process.env.PORT || 8000; // set the port
var database = require('./config/database'); // load the database config
var morgan = require('morgan');
var methodOverride = require('method-override');
var io = require('socket.io')(server);
var cors = require('cors');
var multer = require('multer');
var messageId = {};
var fs = require('fs');
app.use(morgan('dev')); // log every request to the console
app.use(bodyParser.urlencoded({'extended': 'true'})); // parse application/x-www-form-urlencoded
app.use(bodyParser.json()); // parse application/json
app.use(bodyParser.json({type: 'application/vnd.api+json'})); // parse application/vnd.api+json as json
app.use(methodOverride('X-HTTP-Method-Override')); // override with the X-HTTP-Method-Override header in the request
app.use(bodyParser.urlencoded({extended:true}))
app.use(bodyParser.json())
app.use(cors());
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
next();
});
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
var upload = multer({dest :'user-img/'});
var uploadTradeRouter = express.Router();
uploadTradeRouter.post('/trade' , upload.any() , function(req, res, next){
console.log('trade data called' +req);
});
app.use('/upload' , uploadTradeRouter);
app.listen(port);
这是我的uploadimage.ts
import { Component, ViewChild } from '@angular/core';
import { NavController, Navbar, NavParams ,Platform,AlertController,ToastController, LoadingController, ActionSheetController, ModalController} from 'ionic-angular';
import { NativeStorage } from '@ionic-native/native-storage';
import {FormBuilder, FormGroup, Validators, AbstractControl} from '@angular/forms';
import { Camera} from '@ionic-native/camera';
import { FileTransfer, FileUploadOptions, FileTransferObject } from '@ionic-native/file-transfer';
import { ImagePicker } from '@ionic-native/image-picker';
import { Crop } from '@ionic-native/crop';
import { Http, Response } from '@angular/http';
const URL = "http://192.168.43.50:8000/upload/trade";
NewImage()
{
let imageActionSheet = this.actionSheet.create({
title:"Select Image Source",
buttons:[
{
text:"Use Camera",
handler:()=>{
// this.takePicture(this.camera.PictureSourceType.PHOTOLIBRARY)
this.takePicture();
}
},
{
text:"Choose from Gallery",
handler:()=>{
this.browsePicture()
}
},
{
text:'Cancel',
role:'cancel'
}
]
});
imageActionSheet.present();
}
public takePicture(){
var options = {
quality :70,
destinationType: this.camera.DestinationType.FILE_URI,
saveToPhotoAlbum:false,
correctOrientation:true,
sourceType:this.camera.PictureSourceType.CAMERA,
encodingType: this.camera.EncodingType.JPEG
};
this.camera.getPicture(options).then(data=>{
this.UploadImage(data)
}).catch((err)=>{
console.log("Camera error :", err)
}
)
}
UploadImage(imagePath){
const fileTransfer: FileTransferObject = this.transfer.create();
let imageURI = imagePath.split('?').shift()
let loader = this.loadingScreen.create({
content:"Uploading. Please wait"
});
let options = {
fileKey: "file",
fileName: 'profilepic',
chunkedMode: false,
mimeType: 'image/jpeg',
};
//this.formData = new FormData()
//this.formData.append('photo',{imageURI})
loader.present();
// this.http.post(URL,this.formData).map((res:Response)=>res.json()).subscribe((success)=>{
// console.log(success._body);
// },(error)=>{console.log(error);loader.dismiss()})
fileTransfer.upload(imageURI,URL,options).then((entry) => {
console.log("Upload Method");
}, (err) => {
loader.dismiss();
console.log("uplaod error>",JSON.stringify(err)
);
});
}
我无法理解，问题可能在哪里？任何指针都会非常有用。
答案 0 :(得分：0)
请检查以下功能以获取图库中的图像
getFromGallery(){
var that = this;
const options: CameraOptions = {
quality: 100,
destinationType: this.camera.DestinationType.DATA_URL,
encodingType: this.camera.EncodingType.JPEG,
saveToPhotoAlbum: false,
sourceType: this.camera.PictureSourceType.PHOTOLIBRARY
}
this.camera.getPicture(options).then((imageData) => {
that.imageUrl = "data:image/jpeg;base64," + imageData.replace(/(\r\n|\n|\r)/gm, '');
that.imageDataUrl = "data:image/jpeg;base64," + imageData.replace(/(\r\n|\n|\r)/gm, '');
}, (err) => {
console.log(err);
});
}
借助上述功能，我们将在变量中获取图像数据。那么这个值就是后端。并在
中写入数据uploadImage = function(req, res){
var return_val = {};
var imageData = req.body.profile_image;
imageBuffer = decodeBase64Image(imageData);
var imageType = imageBuffer.type;
var typeArr = new Array();
typeArr = imageType.split("/");
var fileExt = typeArr[1];
if((fileExt === 'jpeg') || (fileExt === 'JPEG') || (fileExt === 'JPG') || (fileExt === 'jpg') || (fileExt === 'PNG') || (fileExt === 'png')) {
if (imageBuffer.error) return imageBuffer.error;
var image_name = Date.now()+"_"+req.user._id + '.'+ fileExt;
var imagePath = "public/uploads/profileImage/"+image_name;
}
fs.writeFile(imagePath, imageBuffer.data, function(imgerr, img) {
if (imgerr) {
res.json(imgerr);
}
else {
userModel.findOneAndUpdate({"_id":req.user._id},{$set:{"profile_image":image_name}}, function(errUpdate, dataUpdate){
if(errUpdate){
return_val.success = false;
res.json(return_val);
}
else{
//code to unlink previous file
fs.unlink("public/uploads/profileImage/"+dataUpdate.profile_image, function(errDel, dataDel){
if(errDel){
console.log(errDel);
}
else{
return_val.profile_image = image_name;
return_val.success = true;
res.json(return_val);
}
});
//End of code to unlink previous file
}
});
}
});
}