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January 31, 2018 17:24
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| const AWS = require('aws-sdk'); | |
| const fileType = require('file-type'); | |
| const config = new AWS.Config({ | |
| accessKeyId: process.env.ACCESS_KEY_ID, | |
| secretAccessKey: process.env.SECRET_ACCESS_KEY, | |
| region: process.env.REGION | |
| }); | |
| AWS.config.update(config); | |
| const s3 = new AWS.S3({apiVersion: '2006-03-01'}); | |
| const imageTypes = [ | |
| 'image/gif', | |
| 'image/jpeg', | |
| 'image/png' | |
| ]; | |
| exports.handler = (event, context, callback) => { | |
| //get the image data from upload | |
| const body = JSON.parse(event.body); | |
| const fileBuffer = new Buffer(body['image'], 'base64'); | |
| const fileTypeInfo = fileType(fileBuffer); | |
| //validate image is on right type | |
| if (fileBuffer.length < 500000 && imageTypes.includes(fileTypeInfo.mime)) { | |
| // upload it to s3 with unix timestamp as a file name | |
| const fileName = `${Math.floor(new Date() / 1000)}.${fileTypeInfo.ext}`; | |
| const bucket = process.env.BUCKET; | |
| const params = { | |
| Body: fileBuffer, | |
| Key: fileName, | |
| Bucket: bucket, | |
| ContentEncoding: 'base64', | |
| ContentType: fileTypeInfo.mime | |
| }; | |
| s3.putObject(params, (err, data) => { | |
| if (err) callback(new Error([err.statusCode], [err.message])); | |
| callback(null, { | |
| statusCode: '200', | |
| headers: {'Access-Control-Allow-Origin': '*'}, | |
| body: JSON.stringify({'data': data}) | |
| }); | |
| }); | |
| } else { | |
| callback(null, { | |
| statusCode: '402', | |
| headers: {'Access-Control-Allow-Origin': '*'}, | |
| body: JSON.stringify({"message": "Not a valid file type or file too big."}) | |
| }); | |
| } | |
| }; |
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