Initial commit

Author: Francis Pasoquen

.gitignore

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+**/node_modules/**
+**/target/**
+.project
+.jsbeautifyrc

LICENSE

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+MIT License
+
+Copyright (c) 2019 Francis Pasoquen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# lambda-multipart-parser
+
+## Introduction
+This module will parse the multipart-form containing files and fields from the lambda event object.
+
+## Description
+```
+@param {event} - an event containing the multipart-form in the body
+@return {object} - a JSON object containing array of files and fields, sample below.
+
+{
+    files: [
+        {
+            filename: 'test.pdf',
+            content: <Buffer 25 50 6f 62 ... >,
+            contentType: 'application/pdf',
+            encoding: '7bit',
+            fieldname: 'uploadFile1'
+        }
+    ],
+    field1: 'VALUE1',
+    field2: 'VALUE2',
+}
+```
+
+## Usage

index.js

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+'use strict';
+
+const Busboy = require('busboy');
+
+/*
+ * This module will parse the multipart-form containing files and fields from the lambda event object.
+ * @param {event} - an event containing the multipart-form in the body
+ * @return {object} - a JSON object containing array of files and fields, sample below.
+    {
+        files: [
+            {
+                filename: 'test.pdf',
+                content: <Buffer 25 50 6f 62 ... >,
+                contentType: 'application/pdf',
+                encoding: '7bit',
+                fieldname: 'uploadFile1'
+            }
+        ],
+        field1: 'VALUE1',
+        field2: 'VALUE2',
+    }
+ */
+const parse = (event) => new Promise((resolve, reject) => {
+    const busboy = new Busboy({
+        headers: {
+            'content-type': event.headers['content-type'] || event.headers['Content-Type']
+        }
+    });
+    const result = {
+        files: []
+    };
+
+    busboy.on('file', (fieldname, file, filename, encoding, mimetype) => {
+        const uploadFile = {};
+
+        file.on('data', data => {
+            uploadFile.content = data;
+        });
+
+        file.on('end', () => {
+            if (uploadFile.content) {
+                uploadFile.filename = filename;
+                uploadFile.contentType = mimetype;
+                uploadFile.encoding = encoding;
+                uploadFile.fieldname = fieldname;
+                result.files.push(uploadFile);
+            }
+        });
+    });
+
+    busboy.on('field', (fieldname, value) => {
+        result[fieldname] = value;
+    });
+
+    busboy.on('error', error => {
+        reject(error);
+    });
+
+    busboy.on('finish', () => {
+        resolve(result);
+    });
+
+    busboy.write(event.body, event.isBase64Encoded ? 'base64' : 'binary');
+    busboy.end();
+});
+
+module.exports.parse = parse;