谢谢。 @Dennis 回答。
我也发现了自己的其他方式，我正在发布它。
容器.js
var fs = require('fs');
//Formidable to modify the form obtained as requests.
var IncomingForm = require('formidable');
//Imager for sending and modifying image to amazon
var Imager = require('imager');
Container.beforeRemote('upload', function(ctx, modelInstance, next){
var app = Container.app;
var container = ctx.req.params.container;
//IF u have large image then. use this to avoid timeout..
ctx.req.connection.setTimeout(16000);
//Checking if the container name is valid or not..
var Customer = app.models.Customer;
//http://apidocs.strongloop.com/loopback/#persistedmodel-exists
//Now manually uploading to the provider and first converting the file to the thumbnail..
upload(app, ctx.req, ctx.res, function(err, data){
console.log("Image loaded successfully..");
});
});//beforeRemote
//For handling the upload
var upload = function(app, req, res, options, cb) {
var storageService = app.dataSources.presImage.connector;
if (!cb && 'function' === typeof options) {
cb = options;
options = {};
}
if (storageService.getFilename && !options.getFilename) {
options.getFilename = storageService.getFilename;
}
if (storageService.acl && !options.acl) {
options.acl = storageService.acl;
}
if (storageService.allowedContentTypes && !options.allowedContentTypes) {
options.allowedContentTypes = storageService.allowedContentTypes;
}
if (storageService.maxFileSize && !options.maxFileSize) {
options.maxFileSize = storageService.maxFileSize;
}
return handler(app, storageService.client, req, res, options, cb);
}
//Using handler for form parsing..
var handler = function (app, provider, req, res, options, cb) {
if (!cb && 'function' === typeof options) {
cb = options;
options = {};
}
if (!options.maxFileSize) {
options.maxFileSize = defaultOptions.maxFileSize;
}
var form = new IncomingForm(options);
var fields = {};
var files = [];
form
.on('field', function(field, value) {
fields[field] = value;
})
.on('file', function(field, file) {
//Now upload the file to the amazon server..
uploadToCloud(app, fields.container, res, cb);
})
.on('end', function(name, file) {
console.log("END-> File fetched from user phone.\n");
});
form.parse(req);
}
var uploadToCloud = function(app, container, res, callback ){
var fileName, extension;
var time = new Date();
time = time.getTime();
fileName = '' + container + '_' + time;
imagerConfig = {
variants: {
items: {
rename: function (filename) {
return fileName + "." + extension;
},
resize: {
thumb: "200x200",
original: "100%"
}
}
},
storage: {
S3: {
key: 'AMAZON KEY',
secret: 'AMAZON SECRET',
bucket: 'YOUR BUCKET NAME HERE',
storageClass: 'REDUCED_REDUNDANCY',
secure: false
}
},
debug: true
}
CHECK IF FILE IS IMAGE ONLY..
var pattern = /^image\/(.+)$/;
extension = pattern.exec(path.type);
try{
if(extension.length){
extension = extension[1];
}else{
throw "Error. Only image type file is permitted";
}
}catch(err){
throw "Error getting extension of file..";
}
if(!extension || extension == 'jpeg'){
extension = "jpg";
}
imager = new Imager(imagerConfig, 'S3') // or 'S3' for amazon
imager.upload([path], function (err, cdnUri, files) {
// do your stuff
if(err) throw err;
console.log("Successfully saved to the amazon server..");
var fileArr = [];
for(var i=0; i < files.length; i++){
//Preparing the order object..
fileArr.push({
name: files[i],
container: container
});
}
//Sending the result fast..
//Dont wait for image to get upload..
res.send({
result:{
files:{
file:fileArr
}
}
}); //res.status
callback();
//Now deleting the original file here...path is "os.tmp()"
}, 'items');
}//uploadToCloud..
数据源.json
{
"db": {
"host": "",
"port": 0,
"database": "",
"password": "",
"name": "db",
"connector": "memory",
"user": ""
},
"Image": {
"name": "Image",
"connector": "loopback-component-storage",
"provider": "amazon",
"key": "YOUR AMAZON KEY",
"keyId": "YOUR AMAZON KEY ID",
"maxFileSize": "15728640"
}
}