sails.js Yes. Since Sails is created with Node.js you can usefs.exists. This will remove the file from the array if it's not found. You can load it into your view how you were before. fs = require('fs'); for (i = 0; i < loadJS.length; i++) { fs.exists(loadJS[i], function(exists){ if(!exists){ //remove from array loadJS.splice...
app.post('/upload', upload.single('file'),async(req, res) => {const{path: uploadedFilePath } = req.file;consttargetPath =resolve('uploads', req.file.originalname);try{awaitpromisify(fs.access)(targetPath); res.status(400).json({error:'File already exists.'}); }catch(error) {// ...
if(xmlHttp.status==404) return false; else return true; } 我最喜欢的是第四种方法,代码简单 1、 function CheckImgExists(imgurl) { var ImgObj = new Image(); //判断图片是否存在 ImgObj.src = imgurl; //没有图片,则返回-1 if (ImgObj.fileSize > 0 || (ImgObj.width > 0 && ImgObj....
有一个同步版本的path.exists - path.existsSync..好像是在医生那里漏掉的。
Also users should check the file system's readyState and error properties to make sure it is usable.var fs; function fsReady(err, fs) { if(err) throw err; // Safe to use fs now... } fs = new Filer.FileSystem({ name: "my-filesystem", flags: [ 'FORMAT' ], provider: new ...
Check if a route exists:route().has() // Laravel app has only one named route, 'home'route().has('home');// trueroute().has('orders');// false Retrieve the current route params:route().params // Laravel route called 'venues.events.show' with URI '/venues/{venue}/events/{event...
path String a handlebars template that (when rendered) is the path of the new file template String a handlebars template that should be used to build the new file templateFile String a path a file containing the template skipIfExists Boolean false skips a file if it already exists (instead ...
描述:Node.js® 是一个基于 Chrome V8 引擎 的 JavaScript 运行时环境,它是目前非常火热的技术(正式开启JavaScript的后端开发之旅), 它在设计上类似于Ruby系统并受到Python的Twisted的影响启发,它作为异步事件驱动的JavaScript运行时,它旨在构建可伸缩的网络应用..
Module._cache=Object.create(null);// 这里先定义了一个缓存的对象// ... ...// Check the cache for the requested file.// 1. If a module already exists in the cache: return its exports object.// 2. If the module is native: call// `NativeModule.prototype.compileForPublicLoader()` an...
"signature"Analyzes the first 4 bytes of the returned file and will check if that signature exists in the predetermined dict (You can override/merge this dict with thecustomFileSiganturesproperty). "full"Uses both methods from above but prefers"siganture". ...