implementation ✨

Author: derhuerst

bin.js

@@ -3,6 +3,7 @@
 
 const mri = require('mri')
 
+const encode = require('.')
 const pkg = require('./package.json')
 
 const argv = mri(process.argv.slice(2), {
@@ -16,7 +17,16 @@ const argv = mri(process.argv.slice(2), {
 if (argv.help || argv.h) {
 	process.stdout.write(`
 Usage:
-    as-data-uri
+    as-data-uri [--url-encoded] [--mime mime-type] [--charset utf8]
+
+Options:
+    --url-encoded  -u  Url-encode instead of base64.
+    --mime         -m  Specify a mime type. Default: text/plain.
+    --charset      -c  Specify an optional charset (for text only).
+
+Examples:
+    echo -n 'hello world' | as-data-uri --mime text/plain --url-encoded
+    cat picture.png | as-data-uri --mime image/png | pbcopy
 \n`)
 	process.exit()
 }
@@ -33,4 +43,23 @@ const showError = (err) => {
 	process.exit(err.code || 1)
 }
 
-// todo
+const base64 = !(argv['url-encoded'] || argv.u)
+const mime = argv.mime || argv.m || null
+const charset = argv.charset || argv.c || null
+
+// collect data from stdin
+let data = Buffer.alloc(0)
+process.stdin
+.on('data', (chunk) => {
+	data = Buffer.concat([data, chunk])
+})
+
+.once('error', showError)
+.once('end', () => {
+	try {
+		data = encode(data, mime, charset, base64)
+	} catch (err) {
+		return showError(err)
+	}
+	process.stdout.write(data)
+})

index.js

@@ -1,3 +1,15 @@
 'use strict'
 
-// todo
+const {composeSync} = require('node-rfc2397')
+
+const encode = (data, mime = null, charset = null, base64 = true) => {
+	if (!Buffer.isBuffer(data)) data = Buffer.from(data)
+
+	const info = {data, base64: !!base64}
+	if (mime !== null && mime !== undefined) info.mime = mime
+	if (charset !== null && charset !== undefined) info.parameters = {charset}
+
+	return composeSync(info)
+}
+
+module.exports = encode

package.json

@@ -27,5 +27,7 @@
 		"node": ">=6"
 	},
 	"dependencies": {
+		"mri": "^1.1.0",
+		"node-rfc2397": "^3.0.1"
 	}
 }

readme.md

@@ -2,9 +2,11 @@
 
 **Command line tool to encode data into a [data URI](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs).**
 
-Alternatives:
+Similar to [`data-uri-to-file-cli`](https://github.com/ragingwind/data-uri-to-file-cli), but
 
-- [`data-uri-to-file-cli`](https://github.com/ragingwind/data-uri-to-file-cli)
+- only uses [stdio](https://en.wikipedia.org/wiki/Standard_streams#Standard_input_(stdin)) instead of read and writing files
+- supports url-encoded data URIs (e.g. `data:text/plain,hello%20world`)
+- supports an optional charset
 
 [![npm version](https://img.shields.io/npm/v/as-data-uri-cli.svg)](https://www.npmjs.com/package/as-data-uri-cli)
 [![build status](https://api.travis-ci.org/derhuerst/as-data-uri-cli.svg?branch=master)](https://travis-ci.org/derhuerst/as-data-uri-cli)
@@ -14,8 +16,27 @@ Alternatives:
 
 ## Usage
 
+```
+Usage:
+    as-data-uri [--url-encoded] [--mime mime-type] [--charset utf8]
+
+Options:
+    --url-encoded  -u  Url-encode instead of base64.
+    --mime         -m  Specify a mime type. Default: text/plain.
+    --charset      -c  Specify an optional charset (for text only).
+
+Examples:
+    echo -n 'hello world' | as-data-uri --mime text/plain --url-encoded
+    cat picture.png | as-data-uri --mime image/png | pbcopy
+```
+
+If you have installed it:
+
 ```shell
-# todo
+echo -n 'Hello World!' | as-data-uri -m text/plain -u
+# data:text/plain,hello%20world
+cat foo.png | as-data-uri -m image/png
+# data:image/png;base64,iVBORw0K…CYII=
 ```