Implement S3 storage system with enhanced customs

README.md

@@ -215,6 +215,16 @@ Once you've done that, your config section should look like this:
 }
 ```
 
+If you want to specify some enhanced customs like the endpoint to use (may be useful if you want to use MinIO for example), you can use the `amazon-s3-custom` storage system:
+
+```json
+{
+  "type": "amazon-s3-custom",
+  "endpoint": "https://your-s3-endpoint.com",
+  "bucket": "your-bucket-name"
+}
+```
+
 Authentication is handled automatically by the client. Check
 [Amazon's documentation](https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/setting-credentials-node.html)
 for more information. You will need to grant your role these permissions to

lib/document_stores/amazon-s3-custom.js

@@ -0,0 +1,60 @@
+/*global require,module,process*/
+
+var AWS = require('aws-sdk');
+var winston = require('winston');
+
+var AmazonS3CustomDocumentStore = function(options) {
+  this.expire = options.expire;
+  this.bucket = options.bucket;
+  this.client = new AWS.S3({
+    endpoint: options.endpoint,
+    s3ForcePathStyle: true,
+    signatureVersion: 'v4'
+  });
+};
+
+AmazonS3CustomDocumentStore.prototype.get = function(key, callback, skipExpire) {
+  var _this = this;
+
+  var req = {
+    Bucket: _this.bucket,
+    Key: key
+  };
+
+  _this.client.getObject(req, function(err, data) {
+    if(err) {
+      callback(false);
+    }
+    else {
+      callback(data.Body.toString('utf-8'));
+      if (_this.expire && !skipExpire) {
+        winston.warn('amazon s3 store cannot set expirations on keys');
+      }
+    }
+  });
+}
+
+AmazonS3CustomDocumentStore.prototype.set = function(key, data, callback, skipExpire) {
+  var _this = this;
+
+  var req = {
+    Bucket: _this.bucket,
+    Key: key,
+    Body: data,
+    ContentType: 'text/plain'
+  };
+
+  _this.client.putObject(req, function(err, data) {
+    if (err) {
+      callback(false);
+    }
+    else {
+      callback(true);
+      if (_this.expire && !skipExpire) {
+        winston.warn('amazon s3 store cannot set expirations on keys');
+      }
+    }
+  });
+}
+
+module.exports = AmazonS3CustomDocumentStore;