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README.md

echoip

Build Status

A simple service for looking up your IP address. This is the code that powers https://ifconfig.co.

Usage

Just the business, please:

$ curl ifconfig.co
127.0.0.1

$ http ifconfig.co
127.0.0.1

$ wget -qO- ifconfig.co
127.0.0.1

$ fetch -qo- https://ifconfig.co
127.0.0.1

$ bat -print=b ifconfig.co/ip
127.0.0.1

Country and city lookup:

$ curl ifconfig.co/country
Elbonia

$ curl ifconfig.co/country-iso
EB

$ curl ifconfig.co/city
Bornyasherk

$ curl ifconfig.co/asn
AS59795

As JSON:

$ curl -H 'Accept: application/json' ifconfig.co  # or curl ifconfig.co/json
{
  "city": "Bornyasherk",
  "country": "Elbonia",
  "country_iso": "EB",
  "ip": "127.0.0.1",
  "ip_decimal": 2130706433,
  "asn": "AS59795",
  "asn_org": "Hosting4Real"
}

Port testing:

$ curl ifconfig.co/port/80
{
  "ip": "127.0.0.1",
  "port": 80,
  "reachable": false
}

Pass the appropriate flag (usually -4 and -6) to your client to switch between IPv4 and IPv6 lookup.

Features

  • Easy to remember domain name
  • Fast
  • Supports IPv6
  • Supports HTTPS
  • Supports common command-line clients (e.g. curl, httpie, ht, wget and fetch)
  • JSON output
  • ASN, country and city lookup using the MaxMind GeoIP database
  • Port testing
  • All endpoints (except /port) can return information about a custom IP address specified via ?ip= query parameter
  • Open source under the BSD 3-Clause license

Why?

  • To scratch an itch
  • An excuse to use Go for something
  • Faster than ifconfig.me and has IPv6 support

Building

Compiling requires the Golang compiler to be installed. This package can be installed with go get:

go get github.com/mpolden/echoip/...

For more information on building a Go project, see the official Go documentation.

Docker image

A Docker image is available on Docker Hub, which can be downloaded with:

docker pull mpolden/echoip

Usage

$ echoip -h
Usage of echoip:
  -C int
    	Size of response cache. Set to 0 to disable
  -H value
    	Header to trust for remote IP, if present (e.g. X-Real-IP)
  -a string
    	Path to GeoIP ASN database
  -c string
    	Path to GeoIP city database
  -f string
    	Path to GeoIP country database
  -l string
    	Listening address (default ":8080")
  -p	Enable port lookup
  -r	Perform reverse hostname lookups
  -t string
    	Path to template directory (default "html")