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| 1 | +/** |
| 2 | + * Algorithmia Lambda Function |
| 3 | + * |
| 4 | + * Calls any algorithm in the Algorithmia marketplace |
| 5 | + * Get an API key and free credits by creating an account at algorithmia.com |
| 6 | + * For more documentation see: algorithmia.com/developers/clients/lambda |
| 7 | + */ |
| 8 | + |
| 9 | +var algorithmia = require("algorithmia"); |
| 10 | +var AWS = require('aws-sdk'); |
| 11 | +var apiKey; |
| 12 | + |
| 13 | +// Provide your Algorithmia API key |
| 14 | +apiKey= "<YourApiKey>"; |
| 15 | + |
| 16 | +/* |
| 17 | + * This is the lambda entrypoint (no modification necessary) |
| 18 | + * it ensures apiKey is set |
| 19 | + * and then calls processEvent with the same event and context |
| 20 | + */ |
| 21 | +exports.handler = function(event, context) { |
| 22 | + if(apiKey) { |
| 23 | + processEvent(event, context); |
| 24 | + } else { |
| 25 | + context.fail("API Key has not been set.") |
| 26 | + } |
| 27 | +}; |
| 28 | + |
| 29 | + |
| 30 | +/* |
| 31 | + * Configure your function to interact |
| 32 | +*/ |
| 33 | +var processEvent = function(event, context) { |
| 34 | + /* |
| 35 | + * Step 1: Set the algorithm you want to call |
| 36 | + * This may be any algorithm in the Algorithmia marketplace |
| 37 | + */ |
| 38 | + var algorithm = "algo://demo/Hello"; // algorithmia.com/algorithms/demo/Hello |
| 39 | + |
| 40 | + /* |
| 41 | + * Step 2: Use your event source to set inputData according to the algorithm's input format |
| 42 | + * This demo example uses the S3 Object's name as inputData |
| 43 | + */ |
| 44 | + var inputData = event.Records[0].s3.object.key; // Example for algo://demo/Hello |
| 45 | + |
| 46 | + /* Advanced example: |
| 47 | + * Create 200x50 thumbnails for S3 file events using algo://opencv/SmartThumbnail |
| 48 | + * Algorithm expects input as [URL, WIDTH, HEIGHT] |
| 49 | + * Output is a base64 encoding of the resulting PNG thumbnail |
| 50 | + * |
| 51 | + * var algorithm = "algo://opencv/SmartThumbnail" |
| 52 | + * var s3 = new AWS.S3(); |
| 53 | + * var bucket = event.Records[0].s3.bucket.name; |
| 54 | + * var key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " ")) ; |
| 55 | + * var params = {Bucket: bucket, Key: key}; |
| 56 | + * var signedUrl = s3.getSignedUrl('getObject', params); |
| 57 | + * var inputData = [signedUrl, 200, 50]; |
| 58 | + */ |
| 59 | + |
| 60 | + // Run the algorithm |
| 61 | + var client = algorithmia(apiKey); |
| 62 | + client.algo(algorithm).pipe(inputData).then(function(output) { |
| 63 | + if(output.error) { |
| 64 | + console.log("Error: " + output.error.message); |
| 65 | + context.fail(output.error.message); |
| 66 | + } else { |
| 67 | + /* |
| 68 | + * Step 3: Process the algorithm output here |
| 69 | + * This demo example prints and succeeds with the algorithm result |
| 70 | + */ |
| 71 | + console.log(output); |
| 72 | + context.succeed(output.result); |
| 73 | + } |
| 74 | + }); |
| 75 | +} |
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