---
title: "FineUploader With Wasabi"
slug: "how-do-i-use-fineuploader-with-wasabi"
updated: 2026-05-29T22:43:55Z
published: 2026-05-29T22:43:55Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wasabi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FineUploader With Wasabi

**NOTE: Currently FineUploader does not work with Wasabi and throws the following error while uploading a file - Invalid according to Policy: Policy Condition failed: [“eq”, “$Content-Type”, “image\/png”]**

**This is because currently Wasabi does not handle CORS exactly as Amazon does. It is a future enhancement under consideration.**

[FineUploader](https://fineuploader.com/) is a JavaScript library for client-side uploads, supporting advanced features like concurrent chunking and direct uploads to S3.

This example uses the FineUploader's php-s3-server for handling signature, delete, etc endpoint requests from Fine Uploader S3. The package name is `fineuploader/php-s3-server. `There are various other ways to upload files to s3 using FineUploader so you can also choose other options.

Example code can be found at this location: [fineuploader-example.zip](https://support.bluebillywig.com/sites/support.bluebillywig.com/files/fineuploader-example.zip). Download the source.

To use FineUploader with Wasabi Cloud you need to configure following the steps below (this example uses a MacBook Pro settings might differ on various Windows or Unix OS) :

1. To run this you will need PHP which is already installed on OSX by default.
2. To install node.js you will require npm - Run brew install npm.
3. Please install composer as well. Just follow the instructions to install composer here https://getcomposer.org/download/.
4. Now lets start building our application:
  1. To install Javascript version of FineUploader perform the following steps:
    1. mkdir fineuploader-example
    2. cd fineuploader-example
    3. echo "{}" > package.json
    4. npm install fine-uploader
  2. To install the php backend of fine-uploader perform the following steps:
    1. Edit the composer.json file - vim composer.json
    2. Add the following JSON - { "require": {"fineuploader/php-s3-server": "1.1.0"}}
    3. Now to install the FineUploader php backend run - ./composer.phar install
  3. Next Step is to get the UI running on your Browser - Edit the section in index.php to look like this:![Screen_Shot_2018-08-16_at_5.39.14_PM.png](https://cdn.document360.io/bef0a1ea-7768-4d5a-b520-c4fe2f7fafad/Images/Documentation/screen_shot_2018-08-16_at_5.png)
  4. Now create a Start script to start a PHP server run.
    1. Edit the file - vim startServer.sh
    2. Add the following lines:
      1. #!/bin/bash
      2. export AWS_SERVER_PUBLIC_KEY=YOUR_PUBLIC_ACCESS_KEY
      3. export AWS_SERVER_PRIVATE_KEY=YOUR_SECRET_KEY
      4. export AWS_CLIENT_SECRET_KEY=$AWS_SERVER_PRIVATE_KEY
      5. export S3_BUCKET_NAME=YOUR_BUCKET_NAME
      6. php -S 0.0.0.0:8080
    3. Now make sure the file executable run - chmod +x startupServer.sh
    4. Now to run the PHP server run - ./startupServer.sh
  5. Now use your favorite browser to go to [http://127.0.0.1:8080](http://127.0.0.1:8080) or [http://0.0.0.0:8080](http://0.0.0.0:8080)
  6. You should see the following image shown below:![Screen_Shot_2018-08-16_at_5.53.48_PM.png](https://cdn.document360.io/bef0a1ea-7768-4d5a-b520-c4fe2f7fafad/Images/Documentation/screen_shot_2018-08-16_at_5(1).png)

NOTE: Currently FineUploader does not work with Wasabi and throws the following error while uploading a file - Invalid according to Policy: Policy Condition failed: [“eq”, “$Content-Type”, “image\/png”]

This is because currently Wasabi does not handle CORS exactly as Amazon does. It is a future enhancement under consideration.