Why the `process` method in `server` was called only twice

Summary

The process method in option server will only be called twice.

As you can see, I’ve selected couple of images (more than 2). But only two of them were successfully uploaded (trigger process method).

How to reproduce

Here is my code. I am trying to upload to S3.

<!-- template -->
<template>
  <div id="app">

    <!-- full configuration docs is here -->
    <!-- https://pqina.nl/filepond/docs/patterns/api/filepond-instance/ -->
    <file-pond
      name="test"
      ref="pond"
      label-idle="Drop files here..."
      allow-multiple="true"
      accepted-file-types="image/jpeg, image/png"
      :server="server"
      :instant-upload="false"
      v-bind:files="myFiles"
      :beforeAddFile="beforeAddFile"
      v-on:init="handleFilePondInit"
    />
  </div>
</template>

// server 
  data() {
    return {
      S3_SDK_wrapper,
      myFiles: [],

      // this is an option of filepond, see https://pqina.nl/filepond/docs/patterns/api/server/
      server: {
        process: this.process
      }
    };
  },

// process method, defined in the component's `methods`
process(fieldName, file, metadata, load, error, progress, abort) {
      // fieldName is the name of the input field
      // file is the actual file object to send
      console.count("called",file.name);
      const uploadParams = {
           ...
      };

      let request = this.S3_SDK_wrapper.S3.upload(uploadParams, {
        connectionTimeout: 10 * 60 * 1000, // 10 mins
        httpOptions: { timeout: 10 * 60 * 1000 } // 10 mins
      });

      request.on("httpUploadProgress", function(e) {
        console.log(e.loaded / e.total);
        progress(true, e.loaded, e.total);
      });

      
      request.send(async (err, res) => {
        console.log("??");
      });

      // Should expose an abort method so the request can be cancelled
      return {
        abort: () => {
          // This function is entered if the user has tapped the cancel button
          request.abort();

          // Let FilePond know the request has been cancelled
          abort();
        }
      };
    },

Expected behaviour

All of them will be uploaded.

Additional information

The console log is in below:

Environment	Version
OS	Windows
Device	Desktop
Browser	Chrome 73.036

[theJiawen]

OK, simply drag a directory to it. I was thinking the whole directory is going to be displayed as a directory. (so it won’t be slow when there are hundreds of files inside). Anyway, thanks for your great job!

[theJiawen]

And besides that, how do I upload a directory? I’ve read the docs and did not found it. Thanks 😃