# tusd

A dedicated server for resumable file uploads written in Go.

Sounds interesting? Get notified when it's ready: http://tus.io/

## Roadmap

The initial goal for this project to come up with a good and simple solution
for resumable file uploads over http.

* Defining a good http API (in progress)
* Implementing a minimal / robust server for it
* Creating an HTML5 client
* Setting up an online demo
* Integrating Amazon S3 for storage
* Creating an iOS client
* Collect feedback

Future features will be based on [your
feedback](https://github.com/tus/tusd/issues/new). A few potential ideas:

* Alternative transfer mechanisms: FTP, UDP, E-Mail, etc.
* Security: Authentication Tokens, HTTPS, etc.
* Support for running tusd instances in a geographically distributed cluster
  (reverse CDN)
* Alternative storage backends: Cloud Files, Dropbox, etc.
* More clients: Android, PhoneGap, etc.
* Processing pipelines: Zencoder, Encoding.com, etc.

Once the project matures, we plan to offer a hosted service and support
contracts. However, all code will continue to be released as open source, there
will be no bait and switch.

## HTTP API

Below is the proposed HTTP API for resumable file uploading.

Prior art:

* [Google Drive - Upload Files](https://developers.google.com/drive/manage-uploads)
* [Resumable Media Uploads in the Google Data Protocol](https://developers.google.com/gdata/docs/resumable_upload) (deprecated)
* [ResumableHttpRequestsProposal from Gears](http://code.google.com/p/gears/wiki/ResumableHttpRequestsProposal) (deprecated)

### POST /files

Used to create a resumable file upload. You may send parts or all of your file
along with this request, but this is discouraged as you will not be able to
resume the request if something goes wrong.

**Request Example:**

```
POST /files HTTP/1.1
Host: tus.example.com
Content-Length: 0
Content-Range: bytes */100
Content-Type: image/jpg
```
```
<empty body>
```

**Response Example:**

```
HTTP/1.1 201 Created
Location: http://tus.example.com/files/123d3ebc995732b2
Content-Length: 0
```

The `Location` header returns the `<fileUrl>` to use for interacting with the
file upload.

### PUT \<fileUrl\>

**Request Example:**
```
PUT /files/123d3ebc995732b2 HTTP/1.1
Host: tus.example.com
Content-Length: 100
Content-Range: bytes 0-99/100
```
```
<bytes 0-99>
```

**Response Example:**
```
HTTP/1.1 200 Ok
```

### HEAD \<fileUrl\>

### GET \<fileUrl\>

Used to download an uploaded file.

**Request:**

```
GET /files/123d3ebc995732b2 HTTP/1.1
Host: tus.example.com
```

**Response:**

```
HTTP/1.1 200 Ok
Content-Length: 100
Content-Type: image/jpg
```
```
[file data]
```


## License

This project is licensed under the AGPL v3.

```
Copyright (C) 2013 Transloadit Limited
http://transloadit.com/

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
```