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server.js
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server.js
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const express = require("express");
const fs = require("fs" );
const path = require("path" );
const util = require("util" );
const statAsync = util.promisify(fs.stat );
const readFileAsync = util.promisify(fs.readFile);
const readDirAsync = util.promisify(fs.readdir );
const app = express();
const port = 3000;
// const rootdir = "/";
const rootdir = __dirname;
// const rootdir = "/home/casper/Pictures";
app.use(express.static("./client/"));
app.use(express.json({limit: '1mb'}));
app.listen(port, () => console.log(`Listening to port ${port}`));
function getExtension(absolutepath){
return path.extname(absolutepath).substring(1);
}
function getFiletype(stat, relativepath){
if (stat.isFile()){
const img = ["png", "jpg", "jpeg", "bmp", "gif", "apng", "svg", "ico"];
const ext = getExtension(relativepath);
return img.includes(ext) ? "image" : "textfile";
}
else if (stat.isDirectory()){
return "directory";
}
return "invalid";
}
function getAbsolutepath(relativepath){
const absolutepath = path.join(rootdir, relativepath);
return decodeURI(absolutepath); //To handle spaces in path
}
app.post('/open', async (req, res) => {
const relativepath = path.normalize(req.body.relativepath);
const absolutepath = getAbsolutepath(relativepath);
try{
const stat = await statAsync(absolutepath);
switch (getFiletype(stat, relativepath)){
case "textfile" :
const contents = await readFileAsync(absolutepath, "utf8");
res.json({type: "textfile", newdir: relativepath, data: contents});
break;
case "directory":
const files = await readDirAsync(absolutepath);
res.json({type: "directory", newdir: relativepath, data: files});
break;
case "image":
res.json({type: "image", newdir: relativepath});
break;
default:
console.log("Non-supported filetype");
return;
}
}
catch(e){
console.log("Caught Error: " + e);
return;
}
});
app.get('/image/*', (req, res) => {
const url = (req.originalUrl).split("/image/")[1];
const relativepath = path.normalize(url);
const absolutepath = getAbsolutepath(relativepath);
res.sendFile(absolutepath);
});
// Move client-code to a lower folder.