implement it

.gitignore

@@ -2,3 +2,4 @@ node_modules
 test/download
 .DS_Store
 coverage
+dist

package.json

@@ -2,12 +2,13 @@
   "name": "simpledownload",
   "version": "2.0.0",
   "description": "call with `url` and `filename`, then download the file",
-  "main": "index.js",
+  "main": "dist/index.js",
   "scripts": {
+    "build": "tsc"
   },
   "repository": {
     "type": "git",
-    "url": "git@github.com:alsotang/simpledownload.git"
+    "url": "https://github.com/alsotang/simpledownload.git"
   },
   "keywords": [
     "download"
@@ -19,6 +20,7 @@
   },
   "homepage": "https://github.com/alsotang/simpledownload",
   "devDependencies": {
+    "@types/node": "^17.0.4",
     "typescript": "^4.5.4"
   }
 }

src/index.ts

@@ -0,0 +1,29 @@
+import fs from 'fs'
+import http from 'http'
+
+interface SimpledownloadOptions {
+  timeout?: number;
+}
+
+function simpledownload(url: string, localPath: string, options?: SimpledownloadOptions): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const request = http.get(url, (response) => {
+      const file = fs.createWriteStream(localPath)
+      response.pipe(file)
+      file.on('finish', () => {
+        file.close()
+        resolve()
+      })
+    })
+    request.on('error', (err) => {
+      fs.unlink(localPath, () => {})
+      reject(err)
+    })
+    if (options && options.timeout) {
+      request.setTimeout(options.timeout)
+    }
+  })
+}
+
+export {simpledownload}
+export default simpledownload

tsconfig.json

@@ -31,7 +31,7 @@
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
     // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
     // "typeRoots": [],                                  /* Specify multiple folders that act like `./node_modules/@types`. */
-    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "types": ["node"],                                      /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
     // "resolveJsonModule": true,                        /* Enable importing .json files */
     // "noResolve": true,                                /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */
@@ -42,12 +42,12 @@
     // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */
 
     /* Emit */
-    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
     // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
     // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
-    // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
+    "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
-    // "outDir": "./",                                   /* Specify an output folder for all emitted files. */
+    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */
     // "removeComments": true,                           /* Disable emitting comments. */
     // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */