🦅 Falcon : A dynamic reverse-proxy

A dynamic reverse-proxy server built using Go which can be used as Load Balancer and API Gateway.

Contents

• Installation
• Features
• Configuration
• API reference
• License

Installation

Falcon can be installed directly via go install. To install the latest version:

  go install github.com/yashkundu/falcon@latest

To install a specific release:

  go install github.com/yashkundu/[email protected]

Running Falcon

To start the proxy-server run :

  falcon -config=<configFilePath>

Features

• L7 Load balancing
• Rate Limiting
• Dynamic Backend URLs
• Can be used as an API Gateway

Configuration

The config file is in bin/config/config.toml
Refer to TOML Specificataion.

# the main configs of the reverse-proxy
[core]

# the port where reverse-proxy will listen
# default 80
listen=8000

# the port where the server api will listen
# refer to the below api reference section
# default 9900
apiport=9900

# Enable server stats route
# default - false
enableServerStats=false

# The maximum connections that the reverse-proxy will allow at a particular time
# 0 is infinite
limitMaxConn=0

# if it is 0, there is no timeout, in seconds
readTimeout=0

# if it is 0, there is no timeout, in seconds
writeTimeout=0

# if it is 0, there is no timeout, in seconds
idleTimeout=0

# enable this to implement rate limiting
[limitReq]
enable=false
# in millisecond
interval=1000
frequency=100

# config of proxy
[proxy]

[[proxy.routes]]
endpoint="/hello"
# match (specifies how routes are mathed to the incoming request)
# match - [0 - exact, 1 - prefix, 2 - regex ]
# default - exact
match=1
# balancer (specifies which load balancing algo to be used in case of multiple backends)
# balancer - [0 - roundrobin, 1 - random, 2 - weighted-roundrobin ]
balancer=0

[[proxy.routes.backends]]
# url should be in proper format <schema>://<host>:<port>
url="http://localhost:3000"


# Add varName to enable dynamically changing urls of the particular backend
# varNames for all the backends should be unique othewise only the last backend 
# specified with a particular varName will be dynamic
varName="x1"


[[proxy.routes]]
endpoint="/world"
match=1

[[proxy.routes.backends]]
url="http://localhost:3005"

API Reference

Get current requests handled at this moment

  GET <proxyHostName>:9900/apiStatus/reqCount

Dynamically update the backend url

  POST <proxyHostName>:9900/apiStatus/backendChange

Parameter	Type	Description
varName	string	varName of the backend
url	string	the new backendUrl

License

MIT