将图像上载到uploads文件夹uJavaScript
用户可以发送文本帖子(输入类型=“text”)或图像帖子(输入类型=“file”)。但他们不会两个都派 这是我的表格(翡翠):将图像上载到uploads文件夹uJavaScript,javascript,node.js,forms,file,file-upload,Javascript,Node.js,Forms,File,File Upload,用户可以发送文本帖子(输入类型=“text”)或图像帖子(输入类型=“file”)。但他们不会两个都派 这是我的表格(翡翠): form#addPost(action=“/uploads”,method=“post”,placeholder=“在此处添加您的想法…”) 输入#postinput(type=“text”,name=“contents”placeholder=“在此处添加您的想法…”) div.privacy(class=“onoffswitch”,id='privacytog')
form#addPost(action=“/uploads”,method=“post”,placeholder=“在此处添加您的想法…”)
输入#postinput(type=“text”,name=“contents”placeholder=“在此处添加您的想法…”)
div.privacy(class=“onoffswitch”,id='privacytog')
输入(type=“checkbox”name=“onoffswitch”class=“onoffswitch checkbox”id=“myonoffswitch”选中)
标签(class=“onoffswitch标签”for=“myonoffswitch”)
span(class=“ONOFF开关内部”)
span(class=“onoffswitch开关”)
输入#submit1(type=“submit”,value=“Post”)
下面是我的app.js(服务器端代码)
var util=require(“util”);
var fs=要求(“fs”);
var bodyParser=require('body-parser');
var multer=要求(“multer”);
应用程序使用(multer)({
目的地:“/公开/上传/”
}));
app.post(“/uploads)”,函数(请求、回复){
var数据=请求主体;
var id=请求用户。\u id;
var username=req.user.username;
变量日期=日期();
var-onOff=false;
if(要求主体开启关闭开关){
onOff=true;
}
//图像上载到上载文件夹
如果(请求文件){
log(util.inspect(req.files));
如果(req.files.fileInput.size==0){
返回next(新错误(“嘿,首先选择一个文件吗?”);
}
存在(req.files.fileInput.path,函数(存在){
如果(存在){
res.end(“收到你的文件!”);
}否则{
res.end(“好吧,对于那些不相信它的人来说,没有魔法可言!”);
}
});
}
findById(id,函数(err,User){
if(err)返回handleErr(err);
var uid=shortid.generate();
newPost={
//如果发送图像,请使用data.fileInput而不是contents
目录:[data.contents | |'/img/'+data.fileInput],
_id:uid,
隐私:onOff,
用户名:req.user.username,
日期:日期:,
评级:数字(0),
uwv:[]
};
user.posts.push(newPost);
user.save(函数(err,user){
if(err)返回handleErr(err);
如果(newPost.privacy==='false'){
对于(var i=0;i
正在上载图像并将其保存到上载文件夹。但是,当仅发布文本帖子时(仅填写input type=“text”)它不断抛出错误:无法读取未定义的属性“size”如果没有选择文件,浏览器通常不会发送文件字段,因此后端无法知道有这样的字段
相反,只需检查文件字段是否存在:
if(!req.files.fileInput)
。您可能还需要检查文件是否为空:if(!req.files.fileInput | |!req.files.fileInput.size)
谢谢。工作正常
form#addPost(action="/uploads", method="post", placeholder='Add your ideas here...')
input#postinput(type="text", name="contents" placeholder="Add your ideas here...")
div.privacy(class="onoffswitch", id='privacytog')
input(type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="myonoffswitch" checked)
label(class="onoffswitch-label" for="myonoffswitch")
span(class="onoffswitch-inner")
span(class="onoffswitch-switch")
<div style="height:0px;overflow:hidden">
<input type="file" id="fileInput" name="fileInput" accept="image/*">
</div>
input#submit1(type="submit", value="Post")
var util = require("util");
var fs = require("fs");
var bodyParser = require('body-parser');
var multer = require("multer");
app.use(multer({
dest: "./public/uploads/"
}));
app.post("/uploads", function(req, res) {
var data = req.body;
var id = req.user._id;
var username = req.user.username;
var date = Date();
var onOff = false;
if (req.body.onoffswitch) {
onOff = true;
}
//Images upload to uploads folder
if (req.files) {
console.log(util.inspect(req.files));
if (req.files.fileInput.size === 0) {
return next(new Error("Hey, first would you select a file?"));
}
fs.exists(req.files.fileInput.path, function(exists) {
if(exists) {
res.end("Got your file!");
} else {
res.end("Well, there is no magic for those who don’t believe in it!");
}
});
}
User.findById(id, function(err, user) {
if (err) return handleErr(err);
var uid = shortid.generate();
newPost = {
//If sending down an Image use data.fileInput not contents
contents: [data.contents || '/img/'+data.fileInput],
_id: uid,
privacy: onOff,
username: req.user.username,
date: date,
rating: Number(0),
uwv: []
};
user.posts.push(newPost);
user.save(function(err, user){
if(err) return handleErr(err);
if(newPost.privacy === 'false'){
for (var i = 0; i < user.followers.length; i++) {
User.findOne({username:user.followers[i]}, function(err, follower){
follower.discover.push(newPost)
follower.save();
});
}
}
});
});
}