Use the exifr ExternalReader

lib/meadow/pipeline/actions/extract_exif_metadata.ex

@@ -17,7 +17,7 @@ defmodule Meadow.Pipeline.Actions.ExtractExifMetadata do
   require Logger
 
   @actiondoc "Extract EXIF metadata from FileSet"
-  @timeout 240_000
+  @timeout 10_000
 
   defp already_complete?(file_set, _) do
     with existing_exif <-

priv/nodejs/exif/exif.js

@@ -1,14 +1,32 @@
 const AWS = require("aws-sdk");
 const exifr = require("exifr");
 const URI = require("uri-js");
+const s3 = new AWS.S3();
 
 AWS.config.update({httpOptions: {timeout: 600000}});
 
+const chunkReader = (input, offset, length) => {
+  return new Promise((resolve, _reject) => {
+    let params = {...input};
+
+    if (typeof offset === 'number') {
+      let end = length ? offset + length - 1 : undefined;
+      params.Range = `bytes=${[offset, end].join('-')}`;
+    }
+
+    s3.getObject(params, (err, data) => {
+      if (err) {
+        console.error(err);
+        resolve(undefined);
+      } else {
+        resolve(data.Body);
+      }
+    });
+  });
+}
+
 const extractExif = (source, options) => {
   return new Promise((resolve, reject) => {
-    const s3 = new AWS.S3();
-    const uri = URI.parse(source);
-
     console.log(`Retrieving ${source}`);
 
     const defaultOptions = {
@@ -58,24 +76,20 @@ const extractExif = (source, options) => {
       xmp: true,
       interop: true,
       chunkSize: 1024 * 1024,
+      externalReader: chunkReader
     };
 
-    s3.getObject({ Bucket: uri.host, Key: getS3Key(uri) }, (error, response) => {
-      if(error) {
-        reject(error)
-      } else {
-        console.log(`Extracting EXIF metadata from ${source}`);
-        options = Object.assign(options || defaultOptions, forcedOptions);
-        exifr.parse(response.Body, options)
-          .then(exif => resolve(exif))
-          .catch(err => reject(err));
-      }
-    })
+    const uri = URI.parse(source);
+    const s3Location = { 
+      Bucket: uri.host, 
+      Key: uri.path.replace(/^\/+/, "")
+    };
+
+    options = Object.assign(options || defaultOptions, forcedOptions);
+    exifr.parse(s3Location, options)
+      .then(exif => resolve(exif))
+      .catch(err => reject(err));
   });
 }
 
-const getS3Key = (uri) => {
-  return uri.path.replace(/^\/+/, "");
-};
-
 module.exports = { extractExif };

priv/nodejs/exif/package.json

@@ -6,7 +6,7 @@
   "author": "bmquinn",
   "license": "Apache-2.0",
   "dependencies": {
-    "exifr": "^6.0.0",
+    "exifr": "nulib/exifr#external-reader-dist",
     "uri-js": "^4.4.1"
   },
   "devDependencies": {

priv/nodejs/exif/yarn.lock

@@ -36,10 +36,9 @@ events@1.1.1:
   resolved "https://registry.yarnpkg.com/events/-/events-1.1.1.tgz#9ebdb7635ad099c70dcc4c2a1f5004288e8bd924"
   integrity sha1-nr23Y1rQmccNzEwqH1AEKI6L2SQ=
 
-exifr@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/exifr/-/exifr-6.0.0.tgz#e82af10e158852a1c7e19aea45bceb4cdd486727"
-  integrity sha512-a8n3SVIyuI5NP5VJCb/rJHsqXnofgYL1ZXcJdKBXOmCNIrj+pSExaBFHcbdEF5xp5GQrK4kpOabLJ+wBfUGYuA==
+exifr@nulib/exifr#external-reader-dist:
+  version "6.1.1"
+  resolved "https://codeload.github.com/nulib/exifr/tar.gz/3d926474bc2e629f6352d668c0e5596dc8d3f874"
 
 ieee754@1.1.13:
   version "1.1.13"

terraform/lambdas.tf

@@ -75,12 +75,8 @@ module "exif_function" {
   description = "Function to extract EXIF metadata from an S3 object"
   role        = aws_iam_role.lambda_role.arn
   stack_name  = var.stack_name
-  memory_size = 8192
-  timeout     = 240
-
-  environment = {
-    NODE_OPTIONS = "--max-old-space-size=8192"
-  }
+  memory_size = 512
+  timeout     = 10
 
   tags = merge(
     var.tags,