Add ended logic

lib/models/formats/ogr.js

@@ -325,6 +325,7 @@ function ExportRequest (ostream, callback, beforeSink) {
     this.ostream = ostream;
     this.istream = null;
     this.canceled = false;
+    this.ended = false;
 
     var that = this;
     logger.info({ custom: true }, 'New export request');
@@ -373,17 +374,22 @@ ExportRequest.prototype.sendFile = function (err, filename, callback) {
             .on('error', function (e) {
                 logger.info({ custom: true }, 'Sending file: on error');
                 console.log("Can't send response: " + e);
+                that.ended = true;
                 that.ostream.end();
                 that.cb(e);
                 callback();
             })
             .on('end', () => {
                 logger.info({ custom: true }, 'Sending file: on end');
+                that.ended = true;
                 that.cb();
                 callback();
             })
             .on('close', function() {
                 logger.info({ custom: true }, 'Sending file: testing on close event');
+                if (!that.ended) {
+                    callback();
+                }
             });
     } else {
         logger.info({ custom: true }, 'It was cancelled (sending file)');