mirror of https://github.com/mpolden/echoip
132 lines
2.6 KiB
Markdown
132 lines
2.6 KiB
Markdown
# echoip
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A simple service for looking up your IP address. This is the code that powers
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https://ifconfig.co.
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## Usage
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Just the business, please:
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```
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$ curl ifconfig.co
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127.0.0.1
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$ http ifconfig.co
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127.0.0.1
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$ wget -qO- ifconfig.co
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127.0.0.1
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$ fetch -qo- https://ifconfig.co
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127.0.0.1
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$ bat -print=b ifconfig.co/ip
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127.0.0.1
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```
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Country and city lookup:
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```
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$ curl ifconfig.co/country
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Elbonia
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$ curl ifconfig.co/country-iso
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EB
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$ curl ifconfig.co/city
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Bornyasherk
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$ curl ifconfig.co/asn
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AS59795
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```
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As JSON:
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```
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$ curl -H 'Accept: application/json' ifconfig.co # or curl ifconfig.co/json
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{
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"city": "Bornyasherk",
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"country": "Elbonia",
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"country_iso": "EB",
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"ip": "127.0.0.1",
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"ip_decimal": 2130706433,
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"asn": "AS59795",
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"asn_org": "Hosting4Real"
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}
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```
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Port testing:
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```
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$ curl ifconfig.co/port/80
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{
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"ip": "127.0.0.1",
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"port": 80,
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"reachable": false
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}
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```
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Pass the appropriate flag (usually `-4` and `-6`) to your client to switch
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between IPv4 and IPv6 lookup.
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## Features
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* Easy to remember domain name
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* Fast
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* Supports IPv6
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* Supports HTTPS
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* Supports common command-line clients (e.g. `curl`, `httpie`, `ht`, `wget` and `fetch`)
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* JSON output
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* ASN, country and city lookup using the MaxMind GeoIP database
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* Port testing
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* All endpoints (except `/port`) can return information about a custom IP address specified via `?ip=` query parameter
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* Open source under the [BSD 3-Clause license](https://opensource.org/licenses/BSD-3-Clause)
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## Why?
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* To scratch an itch
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* An excuse to use Go for something
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* Faster than ifconfig.me and has IPv6 support
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## Building
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Compiling requires the [Golang compiler](https://golang.org/) to be installed.
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This package can be installed with:
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`go install github.com/mpolden/echoip/...@latest`
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For more information on building a Go project, see the [official Go
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documentation](https://golang.org/doc/code.html).
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## Docker image
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A Docker image is available on [Docker
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Hub](https://hub.docker.com/r/mpolden/echoip), which can be downloaded with:
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`docker pull mpolden/echoip`
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### Usage
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```
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$ echoip -h
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Usage of echoip:
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-C int
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Size of response cache. Set to 0 to disable
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-H value
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Header to trust for remote IP, if present (e.g. X-Real-IP)
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-a string
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Path to GeoIP ASN database
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-c string
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Path to GeoIP city database
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-f string
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Path to GeoIP country database
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-l string
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Listening address (default ":8080")
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-p Enable port lookup
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-r Perform reverse hostname lookups
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-t string
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Path to template directory (default "html")
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```
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