I need a Node.js script that does the following:
1 - Triggers when an image is added to a specified S3 bucket.
2 - Creates a thumbnail of that image (360x203 pixels).
3 - Saves a copy of that thumbnail inside of a separate S3 folder.
4 - Uploads the thumbnail to a specified FTP server, SIX (6) times using a "FILENAME-X"naming convention.
The problem: I am not able to get the c.connect or c.append to work. I have tried about everything, and scoured the internet. It seems like it should work, but just doesn't.
Note: I removed my FTP credentials for privacy.
var async = require('async');
var AWS = require('aws-sdk');
var util = require('util');
var Client = require('ftp');
var fs = require('fs');
var gm = require('gm')
.subClass({ imageMagick: true }); // Enable ImageMagick integration.
// get reference to FTP client
var c = new Client();
// get reference to S3 client
var s3 = new AWS.S3();
exports.handler = function(event, context) {
// Read options from the event.
console.log("Reading options from event:\n", util.inspect(event, {depth: 5}));
// Get source bucket
var srcBucket = event.Records[0].s3.bucket.name;
// Get source object key
// Object key may have spaces or unicode non-ASCII characters.
var srcKey =
decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
var url = 'http://' + srcBucket + ".s3.amazonaws.com/" + srcKey;
// Set destination bucket
var dstBucket = srcBucket + "-thumbs";
// Set destination object key
var dstKey = "resized-" + srcKey;
// Infer the image type.
var typeMatch = srcKey.match(/\.([^.]*)$/);
if (!typeMatch) {
console.error('unable to infer image type for key ' + srcKey);
return;
}
var imageType = typeMatch[1];
if (imageType != "jpg" && imageType != "png") {
console.log('skipping non-image ' + srcKey);
return;
}
// Download the image from S3, transform, and upload to a different S3 bucket.
async.waterfall([
function download(next) {
// Download the image from S3 into a buffer.
s3.getObject({
Bucket: srcBucket,
Key: srcKey
},
next);
},
function transform(response, next) {
gm(response.Body).size(function(err, size) {
// Transform the image buffer in memory.
this.toBuffer(imageType, function(err, buffer) {
if (err) {
next(err);
} else {
next(null, response.ContentType, buffer);
}
});
});
},
function upload(contentType, data, next) {
// Connect to server
c.connect({
host: "localhost",
port: 21, // defaults to 21
user: "", // defaults to "anonymous"
password: "", // defaults to "@anonymous"
});
// Upload test file to FTP server
c.append(data, srcKey, function(err) {
console.log("CONNECTION SUCCESS!");
if (err) throw err;
c.end();
});
// Stream the thumb image to a different S3 bucket.
s3.putObject({
Bucket: dstBucket,
Key: dstKey,
Body: data,
ContentType: contentType
},
next);
}
], function (err) {
if (err) {
console.error(
'Unable to resize ' + srcBucket + '/' + srcKey +
' and upload to ' + dstBucket + '/' + dstKey +
' due to an error: ' + err
);
} else {
console.log(
'Successfully resized ' + srcBucket + '/' + srcKey +
' and uploaded to ' + dstBucket + '/' + dstKey
);
}
context.done();
}
);
};
Aucun commentaire:
Enregistrer un commentaire