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@kingkool68
Created November 14, 2017 18:33
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AWS Lambda Function for Proxying Requests to S3
/**
* This is a simple AWS Lambda function that will look for a given file on S3 and return it
* passing along all of the headers of the S3 file. To make this available via a URL use
* API Gateway with an AWS Lambda Proxy Integration.
*
* Set the S3_REGION and S3_BUCKET global parameters in AWS Lambda
* Make sure the Lambda function is passed an object with `{ pathParameters : { proxy: 'path/to/file.jpg' } }` set
*/
var AWS = require('aws-sdk');
exports.handler = function( event, context, callback ) {
var region = process.env.S3_REGION;
var bucket = process.env.S3_BUCKET;
var key = decodeURI( event.pathParameters.proxy );
// Basic server response
/*
var response = {
statusCode: 200,
headers: {
'Content-Type': 'text/plain',
},
body: "Hello world!",
};
callback( null, response );
*/
// Fetch from S3
var s3 = new AWS.S3( Object.assign({ region: region }) );
return s3.makeUnauthenticatedRequest(
'getObject',
{ Bucket: bucket, Key: key },
function(err, data) {
if (err) {
return err;
}
var isBase64Encoded = false;
if ( data.ContentType.indexOf('image/') > -1 ) {
isBase64Encoded = true;
}
var encoding = '';
if ( isBase64Encoded ) {
encoding = 'base64'
}
var resp = {
statusCode: 200,
headers: {
'Content-Type': data.ContentType,
},
body: new Buffer(data.Body).toString(encoding),
isBase64Encoded: isBase64Encoded
};
callback(null, resp);
}
);
};
@tsih123
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tsih123 commented May 12, 2020

@apotox I was wondering if you managed to get Lambda to act as a proxy to serve S3 static website content? I tried your code above but I keep getting 404 body not found!

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