在最近的項目中需要將含 input[type='file']的表單提交給后台 ,並且后台需要將文件存儲在數據庫中。之前所用的方法都是先將文件上傳到七牛服務器上,然后七牛會返回文件的下載地址,在提交表單的時候將文件的下載地址和其他表單元素一起提交即可。但是現在考慮到安全性,這些文件不能上傳到七牛服務器上,得直接提交給后台存儲到數據庫中,在此需要注意以下問題:
1、提交表單時,如果要提交file,那么form標簽里必須使用 enctype="multipart/form-data" 來設置編碼。
2、提交表單時,為了使頁面不跳轉,引用jquery.form.js插件,使用ajaxSubmit方法提交表單;
3、提交到nodejs后先將文件上傳至node服務器,然后再將文件傳給后端。
下面說一個具體的例子(例子中用了angularjs+nodejs+express):
第一步:在package.json頁面中加入需要的模塊,然后npm install進行模塊安裝,並創建存儲上傳文件的臨時文件夾uploadFiles.
工程目錄結構:
"dependencies": { "body-parser": "~1.13.1", "cookie-parser": "~1.3.5", "debug": "~2.2.0", "ejs": "~2.3.2", "express": "~4.13.0", "express-session": "*", "morgan": "~1.6.1", "serve-favicon": "~2.3.0", "ali-data-mock": "0.1.3", "ali-data-proxy-lite": "1.1.16", "ccap": "*", "fs-extra":"*",//上傳文件需要導入的包; "formidable":"*", "request":"*" }
第二步:html頁面
1 <!----------------------------------編輯支付方式-------------------------------------> 2 <div class="modal fade" id="editChannel" tabindex="-1" role="dialog" aria-labelledby="editTit" aria-hidden="true"> 3 <div class="modal-dialog"> 4 <div class="modal-content"> 5 <form enctype="multipart/form-data" id="upPayChannelForm" method="post" >
/****該處設置form的編碼方式(multipart/form-data表示有文件需要提交)******/ 6 <div class="modal-header"> 7 <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> 8 <h4 class="modal-title" id="editTit">編輯支付方式</h4> 9 </div> 10 <div class="modal-body"> 11 <div class="form-group"> 12 <p>支付方式<span class="fill_in">(必填)</span></p> 19 <p><input type="text" class="form-control" name="name" value="{{upChannel.name}}" ng-model="upChannel.name" readonly/></p> 20 <p hidden><input type="text" class="form-control" name="type" value="{{upChannel.type}}" ng-model="upChannel.type"/></p> 21 </div> 27 <div class="form-group"> 28 <p>收款賬號<span class="fill_in">(必填)</span></p> 29 <p><input type="text" class="form-control" name="account" value="{{upChannel.account}}" ng-model="upChannel.account"/><p> 31 </div> 33 <div class="form-group"> 34 <p>私有密碼<span class="fill_in">(必填)</span></p> 35 <p><input type="password" class="form-control" name="privatePassword" value="{{upChannel.privatePassword}}" ng-model="upChannel.privatePassword"/></p> 37 </div> 38 <div class="form-group"> 39 <p>公鑰<span class="fill_in">(必填)</span></p> 40 <p><input type="file" name="publickey" id="publicKeyUp" fileread="upChannel.publicKey" accept=".cer,.cex,.crt,.key"/></p> 43 </div> 44 <div class="form-group"> 45 <p>密鑰<span class="fill_in">(必填)</span></p> 46 <p><input type="file" name="privateKey" id="privateKeyup" fileread="upChannel.privateKey" accept=".cer,.cex,.crt,.key"/></p> 49 </div> 50 <div class="form-group"> 51 <p>附加內容<span class="fill_in">(必填)</span></p> 52 <p><input type="text" class="form-control" name="addition" value="{{upChannel.addition}}" ng-model="upChannel.addition"/></p> 54 </div> 56 </div> 57 <div class="modal-footer"> 58 <button type="cancel" class="cancel" data-dismiss="modal">返回</button> 59 <button type="button" class="submit createNormalAppBtn" ng-click="updateChannel()">完成</button> 60 </div> 61 </form> 63 </div> 64 </div> 65 </div>
<script src="http://malsup.github.io/jquery.form.js"></script>//引入jquery.form.js文件,后面service中才能只提交數據,控制頁面不跳轉
第三步:controller中對表單進行驗證:
1 //編輯支付方式; 2 $scope.upChannel={ 3 "id":"", 4 "businessId":"", 5 "name":"", 6 "type":"", 7 "account":"", 8 "addition":"", 9 "privatePassword":"", 10 "userName":"", 11 "businessName":"", 12 "locked":"", 13 "publicKey":"", 14 "privateKey":"" 15 } 16 $scope.updateChannel=function(){ 17 //console.log(JSON.stringify($scope.upChannel)); 18 if(checkUpChannel($scope.upChannel)){//表單驗證通過后,checkUpChannel($scope.upChannel)函數對表單元素進行一般的驗證; 19 channel.updateChannel($scope.upChannel).then(function(data){ //驗證通過后將表單中非file元素數據提交到service層處理; 20 if(data=="success"){ 21 angular.element("#editChannel").modal("hide"); 22 getChannelList(1,10); 23 } 24 },function(err){ 25 if(err.code=='ECONNREFUSED'){ 26 Tip(err.code); 27 }else{ 28 Tip(err.statusCode); 29 } 30 }); 31 } 32 }
第四步:service中:
1 //編輯支付方式 2 updateChannel:function(upChannel){ 3 var deferred= $q.defer(); 4 var user=JSON.parse(utf8to16(base64decode($cookies.userPay)));//獲取cookie 5 6 console.log("service:"+JSON.stringify(upChannel)); 7 //手動提交表單; 8 var upForm=document.getElementById("upPayChannelForm");
//設置表單要提交的路徑,這里的'/channel/update'是node端配置的路由; 9 upForm.action='/channel/update?userId='+user.userId+'&businessId='+user.businessId+'&modeId='+upChannel.id+'&name='+upChannel.name+'&type='+upChannel.type;
//使用jqeury.form.js插件中的ajaxSubmit提交表單,但是頁面並不跳轉,在一般的表單提交中,如果設置了action屬性,那么在提交時頁面會自動跳轉到action屬性所對應的頁面中
10 $("#upPayChannelForm").ajaxSubmit(function(message) {
11 // 對於表單提交成功后處理,message為提交頁面saveReport.htm的返回內容 12 var data=JSON.parse(message); 13 //console.log(data); 14 if(data.code==200){ 15 return deferred.resolve('success'); 16 }else if(data.code=='ECONNREFUSED'){ 17 return deferred.reject(data); 18 }else{ 19 swal("",data.info,"error"); 20 return deferred.reject(data);//結果正確后返回給controller 21 } 22 }); 23 return deferred.promise; 24 }
第五步:在app.js文件里配置nodejs路由:
var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var ejs=require("ejs"); /***********文件上傳1**************/ //var busboy = require('connect-busboy'); //middleware for form/file upload /********設置nodejs路由對應的文件*************/ var index = require('./routes/index'); var ccap=require('./routes/ccap'); var jiami=require("./routes/jiami"); var changePwd=require('./routes/changePwd'); var login=require("./routes/login"); var business=require("./routes/pay/business"); var logs=require("./routes/pay/logs"); var channel=require("./routes/pay/channel");//配置路由 var config=require("./routes/pay/config"); //var fileUpload=require("./routes/fileUpload"); /********設置nodejs路由對應的文件*************/ var app = express(); /**********文件上傳1*****************/ //app.use(busboy()); /***********文件上傳2************/ //app.use(bodyParser({defer: true})); // view engine setup app.set('views', path.join(__dirname, 'views')); //app.set('view engine', 'ejs'); app.engine('html',ejs.__express); app.set('view engine', 'html'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); //登錄攔截器 app.use(function (req, res, next) { // var ip=getClientIp(req); console.log("獲取的cookie是: "+req.cookies.userCookiesPay); var url = req.originalUrl; var userCookiesPay=req.cookies.userCookiesPay; var businessIndex=url.indexOf('/business')!=-1; var changePwdIndex=url.indexOf('/changePwd')!=-1; var logsIndex=url.indexOf('/logs')!=-1; var channelIndex=url.indexOf('/channel')!=-1; var configIndex=url.indexOf('/config')!=-1; if(url=='/login'&&!(userCookiesPay==undefined)){ return res.redirect('/'); }else if((userCookiesPay==undefined)&&(businessIndex||changePwdIndex||logsIndex||channelIndex||configIndex)){ return res.redirect('/'); } next(); }); /***********node路由************/ app.use('/', index); app.use('/ccap',ccap); app.use("/app/jiami",jiami); app.use("/login",login); app.use("/changePwd",changePwd); app.use("/business",business); app.use("/logs",logs); app.use("/channel",channel); app.use("/config",config); //app.use("/fileUpload",fileUpload); /***********node路由************/ // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;
第六步:最重要的來了,在channel.js文件里進行上傳文件和提交表單給后端:
var express = require('express'); var router = express.Router(); var crypto=require('crypto'); /****導入上傳文件所需要的包********/ var request=require('request');
var path=require('path');//used for file path var formidable = require('formidable'); var fs =require('fs-extra'); //File System-needed for renaming file etc //編輯支付方式 router.post("/update",function(req,res){
/**********從action的path地址中獲取需要的參數*********************/ var ip=getClientIp(req); var clientIp=ip.substring(7,ip.length); var businessId=req.query.businessId; var userId=req.query.userId; var modeId=req.query.modeId; var name=req.query.name; var type=req.query.type; var publicName,privateName; //定義一個表單,post存儲表單中元素的name和value,為json格式數據;file為表單中選擇的文件, var form=new formidable.IncomingForm(); var post={},file={}; form.uploadDir="./../routes/uploadFiles";//表單中文件上傳的臨時文件的位置; form.encoding="utf-8"; //設置form編碼; form.keepExtensions = true; //保留后綴 form.on('error', function(err) { console.log(err); //各種錯誤 }) //POST:表單中除文件之外的普通數據,不包含文件 field:表單中元素的name value:表單中元素的value值 .on('field', function(field, value) { if (form.type == 'multipart') { //有文件上傳時 enctype="multipart/form-data" if (field in post) {//同名表單 checkbox 返回array 同get處理 if (util.isArray(post[field]) === false) { post[field] = [post[field]]; } post[field].push(value); return; } } if(field=='name'){ post[field]=name; }else{ post[field] =value; } if(field=='type'){ post[field]=type; }else{ post[field] =value; } console.log(field+"---"+post[field]); }) .on('file', function(field, file) { //上傳文件,對表單中選擇的每個文件進行遍歷; console.log("表單中的內容:" + JSON.stringify(post)); //console.log(file); //打印上傳文件結構 console.log(field);//文件field,即html中 <input type='file' name='XXX'/>中的name屬性值; console.log(file.name); //文件名稱 console.log(file.size); //文件大小 console.log(file.type); //文件類型 console.log(file.path); //文件路徑 if(field=='publickey'){ publicName=file.name; } if(field=='privateKey'){ privateName=file.name; } file[field] = file; //console.log("fiel[" + field + ']=' + file[field]); fs.rename(file.path, form.uploadDir+"/"+file.name, function(err) { //默認會將上傳的文件自動生成一個文件名存儲在設置的路徑下,現在將改文件重新命名為上傳文件本身的名稱移動到工程目錄下; if (err) throw err; }) console.log("參數列表:"+modeId+"-"+userId+"-"+businessId+"-"+clientIp+"-"+post['name']+"-"+post['account']+"-"+post['type']+"-"+post['addition']+"-"+post['privatePassword']); console.log(publicName+"/"+privateName+"/"+(privateName!=undefined&&publicName!=undefined)); if(privateName!=undefined&&publicName!=undefined){ //判斷兩個文件都上傳完成后,開始將表單提交給后端; //console.log(fs.createReadStream(path.join(form.uploadDir+"/", publicName))); //console.log(fs.createReadStream(path.join(form.uploadDir+"/", privateName))); var data={ modeId:modeId, userId:userId, businessId:businessId, ip:clientIp, name:post['name'], account:post['account'], type:post['type'], addition:post['addition'], privatePassword:post['privatePassword'], publicKey:fs.createReadStream(path.join(form.uploadDir+"/", publicName)),//讀取上傳的文件,並存儲在文件流中 privateKey:fs.createReadStream(path.join(form.uploadDir+"/",privateName))//讀取上傳的文件,並存儲在文件流中
};
//request.post直接請求后台接口,url:為后台接口,?后面是需要跟的參數,formData:是需要傳遞的表單數據(有文件的話包含了文件),optionCallback為回調函數,請求成功后所做的處理。 request.post({url:'http://10.3.30.117:8888/payplus/internal/v1/pay/business/'+businessId+'/mode/'+modeId+'/update?name='+post['name']+'&account='+post['account']+'&addition='+post['addition']+'&type='+post['type']+'&privatePassword='+post['privatePassword']+'&userId='+userId+'&ip='+clientIp,formData:data},function optionalCallback(err, httpResponse, body){ console.log('upload failed:'+err); //console.log(httpResponse); if (err) { //return console.error('upload failed:', err); console.log('upload failed:'+err); var error=JSON.parse(err); if(error.code=='ECONNREFUSED'){ res.status(error.code).send(error); }else if(error.statusCode==404||error.statusCode==500){ res.status(error.statusCode).send(error); }else{ var responseText=JSON.parse(error.responseText); res.send(responseText); } } console.log('Upload successful! Server responded with:', body); res.send(body);//將后台返回的結果返回給service; }); } }) .on('end', function() { console.log("success"); }); form.parse(req); //解析request對象 }); module.exports = router;
至此,編輯支付方式的表單就可以成功上傳並存儲在數庫了。