github.com/espebra/filebin/app/shared

Filebin is a web application that facilitates convenient file sharing over the web.


License
BSD-3-Clause
Install
go get github.com/espebra/filebin/app/shared

Documentation

Build Status

Viewing a bin

Filebin is a web application that facilitates convenient file sharing over the web. It is the software behind https://filebin.net.

Table of contents

Features

  • Responsive and mobile friendly web interface.
  • All functionality available through an HTTP API.
  • Upload files using drag and drop, select files from a dialog box or use cURL (examples below)
  • Large file support. 30 GB file upload has been tested, but it should work fine with larger files as well.
  • Archive (tar and zip) download to make it easy to download multiple files in one go.
  • Files expire automatically after a configurable period of time.
  • Files and entire bins can be deleted manually.
  • Thumbnails are displayed for image files.
  • Album view is available in bins with images. Images are sorted based on the Exif DateTime timestamps.
  • Triggers are capable of calling external scripts on certain events. One potential use case is to notify virus/malware scanners on file upload.
  • No external dependencies once built.
  • Cache invalidation support.

Requirements

To build Filebin, a Golang build environment (Go version 1.4 or higher) and some Golang packages are needed. The build procedure will produce a statically linked binary that doesn't require any external dependencies to run. It even comes with its own web server bundled.

The build process requires quite a bit of memory to complete successfully. Rough experiments show that up to 4 GB of memory is needed. At runtime, though, the memory requirements are modest. It seems that with the more memory requirements have droppet with recent releases of Go.

It is recommended but not required to run it behind a TLS/SSL proxy such as Hitch and web cache such as Varnish Cache. Example configurations for these are provided.

Installation

Install Golang:

$ sudo yum/apt-get/brew install golang

Last verified with Go 1.7.

Create the Go workspace and set the GOPATH environment variable:

$ mkdir ${HOME}/go
$ cd ${HOME}/go
$ mkdir src bin pkg
$ export GOPATH="${HOME}/go"
$ export PATH="${PATH}:${GOPATH}/bin"

Download and install Filebin:

$ go get -d github.com/espebra/filebin
$ cd ${GOPATH}/src/github.com/espebra/filebin
$ make get-deps
$ make install

The binary is created as ${GOPATH}/bin/filebin, which can be executed immediately. The --version argument prints the build time and the git commit hash used in the build.

$ ${GOPATH}/bin/filebin --version
Git Commit Hash: 40bd401ec350c86a46cdb3dc87f6b70c3c0b796b
UTC Build Time: 2015-11-11 23:01:35

Create the directories to use for storing files and temporary files:

$ mkdir ~/filebin ~/filebin/files ~/filebin/temp

Configuration

Configuration is done using command line arguments when starting filebin. The built in help text will show the various arguments available:

$ ${GOPATH}/bin/filebin --help

Some arguments commonly used to start filebin are:

$ ${GOPATH}/bin/filebin \
  --host 0.0.0.0 --port 31337
  --baseurl http://api.example.com:31337
  --filedir ~/filebin/files \
  --tempdir ~/filebin/temp \
  --expiration 604800 \
  --cache-invalidation \
  --admin-username admin \
  --admin-password changeme \
  --client-address-header x-client \
  --access-log /var/log/filebin/access.log \
  [...]

By default it will listen on 127.0.0.1:31337.

Command line arguments

The following are elaborations on some of the command line arguments.

Baseurl

The --baseurl parameter is used when building HATEOAS links in the JSON responses and to generate the correct hyperlinks in the HTML responses. If --baseurl is wrong, the required css and javascript resources will not load properly.

An example when having a TLS/SSL proxy in front on port 443 would be --baseurl https://filebin.example.com.

It is also possible to run filebin from a subdirectory if specifying this accordingly with for example --baseurl https://www.example.com/filebin.

A trailing slash is not needed.

Expiration

Bins expire after some time of inactivity. By default, bins will expire 3 months after the most recent file was uploaded. It is not possible to download files or upload more files to bins that are expired.

--expiration 86400 will expire bins 24 hours after the last file has been uploaded.

Cache invalidation

Enabled with the parameter --cache-invalidation. When enabled, HTTP PURGE requests will be sent to baseurl/path for every change to ensure content is invalidated on any frontend web cache.

Client Address Header

The parameter --client-address-header can specify a request header to read the original client IP address from. This might be useful if having one or more proxies on layer 7 in front of the filebin daemon.

Admin username and password

The parameters --admin-username and --admin-password will, if set, enable the administrator page. It is available at the URL baseurl/admin, with the specified username and password for login.

Access log

The parameter --access-log is used to set a full path for the access log. The access log is written in the Combined Log Format.

Triggers

Triggers enable external scripts to be executed at certain events.

New bin

The parameter --trigger-new-bin <command> makes sure <command> <bin> is executed whenever a new bin is being created. The execution is non-blocking. Example:

--trigger-new-bin /usr/local/bin/new-bin will execute /usr/local/bin/new-bin <binid>.

Upload file

The parameter --trigger-upload-file <command> makes sure <command> <bin> <filename> is executed whenever a new file is uploaded. The execution is non-blocking. Example:

--trigger-upload-file /usr/local/bin/upload-file will execute /usr/local/bin/upload-file <binid> <filename>.

Download bin

The parameter --trigger-download-bin <command> makes sure <command> <bin> is executed whenever a bin is downloaded as an archive. The execution is non-blocking. Example:

--trigger-download-bin /usr/local/bin/download-bin will execute /usr/local/bin/download-bin <binid>.

Download file

The parameter --trigger-download-file <command> makes sure <command> <bin> <filename> is executed whenever a file is downloaded. The execution is non-blocking. Example:

--trigger-download-file /usr/local/bin/download-file will execute /usr/local/bin/download-file <binid> <filename>.

Delete bin

The parameter --trigger-delete-bin <command> makes sure <command> <bin> is executed whenever a bin is deleted. The execution is non-blocking. Example:

--trigger-delete-bin /usr/local/bin/delete-bin will execute /usr/local/bin/delete-bin <binid>.

Delete file

The parameter --trigger-delete-file <command> makes sure <command> <bin> <filename> is executed whenever a file is deleted. The execution is non-blocking. Example:

--trigger-delete-file /usr/local/bin/delete-file will execute /usr/local/bin/delete-file <binid> <filename>.

Web interface

Create new bin / empty bin

New bin

File uploads in progress

File uploads in progress

View bin with files

View bin with files

Web service

Upload file

Value
Method POST
URL /
URL parameters None
Request headers filename, bin, content-sha256
Request body File content in binary form
Success response 201
Error response 400
Examples

In all examples, the local file /path/to/some file will be uploaded.

Using the following command, the bin will be automatically generated and the filename will be set to the SHA256 checksum of the content. The checksum of the content will not be verified.

$ curl --data-binary "@/path/to/some file" https://filebin.example.com/

Using the following command, bin will be set to custombin and filename will be set to myfile.

$ curl --data-binary "@/path/to/some file" https://filebin.example.com/ \
  -H "bin: custombin" -H "filename: myfile"

Using the following command, filebin will verify the checksum of the uploaded file and discard the upload if the checksum does not match the specified checksum:

$ curl --data-binary "@/path/to/some file" https://filebin.example.com/ \
  -H "bin: custombin" -H "filename: myfile" \
  -H "content-sha256: 82b5f1d5d38641752d6cbb4b80f3ccae502973f8b77f1c712bd68d5324e67e33"

Fetch bin details

Value
Method GET
URL /:bin
URL parameters None
Request headers Accept: application/json
Request body None
Success response 200
Error response 404
Examples

The following command will print a JSON structure showing which files that available in the bin custombin.

$ curl -H "Accept: application/json" https://filebin.example.com/custombin

Fetch bin as an archive

Value
Method GET
URL /:archive/:bin/:format
URL parameters None
Request headers None
Request body None
Success response 200
Error response 404
Examples

The following commands will download the files in custombin as tar and zip archives:

# Tar
$ curl -o custombin.tar https://filebin.example.com/archive/custombin/tar

# Zip
$ curl -o custombin.zip https://filebin.example.com/archive/custombin/zip

Download file

Value
Method GET
URL /:bin/:filename
URL parameters None
Request headers None
Request body None
Success response 200
Error response 404
Examples

Downloading a file is as easy as specifying the bin and the filename in the request URI:

$ curl https://filebin.example.com/custombin/myfile

Delete file

Value
Method DELETE
URL /:bin/:filename
URL parameters None
Request headers None
Request body None
Success response 200
Error response 404

Delete bin

Value
Method DELETE
URL /:bin
URL parameters None
Request headers None
Request body None
Success response 200
Error response 404
Examples
$ curl -X DELETE https://filebin.example.com/custombin/myfile

Logging

Logs are written to stdout, and can easily be redirected to for example syslog when using the systemd service script provided.

Database

Filebin does currently not use any other database than the filesystem itself.

Development

Git hooks

There is a pre-commit hook available in the repository that will make sure that commited go source code is properly formatted. Enable it with a symlink:

$ ln -s tools/git/pre-commit .git/hooks/pre-commit

TODO

  • Automatically clean up expired bins.
  • Avoid reuse of expired bins.
  • Trigger cache invalidation on bin expiration.