Check for binary files

controllers/pastes.js

@@ -1,5 +1,6 @@
 const config = require('config');
 const fs = require('fs').promises;
+const isBinaryFile = require('isbinaryfile').isBinaryFile;
 const Paste = require('../models/paste');
 
 module.exports = {
@@ -40,7 +41,12 @@ module.exports = {
 					path = ctx.request.files.paste.path;
 				}
 
-				ctx.request.body.paste = await fs.readFile(path);
+				const data = await fs.readFile(path);
+				const stat = await fs.lstat(path);
+
+				if (isBinaryFile(data, stat.size)) ctx.throw();
+
+				ctx.request.body.paste = data;
 
 				try {
 					await fs.unlink(path);

package-lock.json

@@ -1457,6 +1457,11 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
+    "isbinaryfile": {
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/isbinaryfile/-/isbinaryfile-4.0.6.tgz",
+      "integrity": "sha512-ORrEy+SNVqUhrCaal4hA4fBzhggQQ+BaLntyPOdoEiwlKZW9BZiJXjg3RMiruE4tPEI3pyVPpySHQF/dKWperg=="
+    },
     "isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",

package.json

@@ -24,6 +24,7 @@
   "dependencies": {
     "bytes": "^3.1.0",
     "config": "^3.3.1",
+    "isbinaryfile": "^4.0.6",
     "koa": "^2.13.0",
     "koa-body": "^4.2.0",
     "koa-compress": "^5.0.1",