I've been working on uploading images to S3 using AWS Lambda. I found some helpful code in a URL and made some modifications to the variables fileFullPath and Bucket:
Upload Image into S3 bucket using Api Gateway, Lambda funnction
const AWS = require('aws-sdk');
const s3 = new AWS.S3();
const moment = require('moment');
const fileType = require('file-type');
const sha1 = require('sha1');
const multipart = require('parse-multipart');
exports.handler = function (event, context, callback) {
let request = event.body;
// get the request
let base64String = request.base64String;
// pass the base64 string into a buffer
let buffer = new Buffer(base64String, 'base64');
let fileMime = fileType(buffer);
// check if the base64 encoded string is a file
if (fileMime === null) {
return context.fail('The string supplied is not a file type');
}
let file = getFile(fileMime, buffer);
// let file = getFile(fileMime, parts);
let params = file.params;
s3.upload(params, function (err, data) {
// putObject(params, function (err, data) {
if (err) {
console.log(err);
callback(err);
}
// if the file object is uploaded successfully to
// s3 then you can get your full url
console.log('File URL', file.full_path + JSON.stringify(data));
callback(null, data);
});
}
let getFile = function (fileMime, buffer) {
// get the file extension
let fileExt = fileMime.ext;
let hash = sha1(new Buffer(new Date().toString()));
let now = moment().format('YYYY-MM-DD');
let filePath = hash + '/';
let fileName = now + '.' + fileExt;
let fileFullName = filePath + fileName;
let fileFullPath = 'https://console.aws.amazon.com/s3/buckets/bucket-name/images/' + fileFullName;
console.log('fileFullPath' + fileFullPath);
let params = {
Bucket: 'bucket-name',
Key: fileFullPath,
// 'this is simply the filename and the extension, e.g fileFullName + fileExt',
Body: buffer,
ContentType: fileMime.mime
};
let uploadFile = {
size: buffer.toString('ascii').length,
type: fileMime.mime,
name: fileName,
full_path: fileFullPath
}
return {
'params': params,
'uploadFile': uploadFile
}
}
https://i.stack.imgur.com/EPpdi.png
Execution role for this lambda function: https://i.stack.imgur.com/zbLAc.png
In API Gateway, I only create the resource and method 'POST' and have nothing set in method request section.
I've made a test for this POST method but Internal server error occur:
https://i.stack.imgur.com/JyQKi.png
Update: current error got from cloudwatch
The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined