https://github.com/vkuznet/dcr

DNS Cache Resolver
https://github.com/vkuznet/dcr

Last synced: about 1 month ago
JSON representation

DNS Cache Resolver

• Host: GitHub
• URL: https://github.com/vkuznet/dcr
• Owner: vkuznet
• License: mit
• Created: 2020-09-22T12:44:34.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-03-05T12:26:58.000Z (about 3 years ago)
• Last Synced: 2025-02-10T01:41:30.580Z (3 months ago)
• Language: Go
• Size: 14.6 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
### DNS Cache Resolver (dcr)

[![Build Status](https://travis-ci.org/vkuznet/dcr.svg?branch=master)](https://travis-ci.org/vkuznet/dcr)

[![Go Report Card](https://goreportcard.com/badge/github.com/vkuznet/dcr)](https://goreportcard.com/report/github.com/vkuznet/dcr)

[![GoDoc](https://godoc.org/github.com/vkuznet/dcr?status.svg)](https://godoc.org/github.com/vkuznet/dcr)

dcr is a simple library to resolve and cache URLs from hostbased naming

convention to IP based one. For instance, if you have an URL like

`http://www.google.com` and would like to resolve it into IP based URL

this library will help you, e.g.

```

// set DNSManager

var mgr DNSManager

host := "www.google.com"

rurl := fmt.Sprintf("http://%s/", host)

// resolve given URL

ipUrl := mgr.Resolve(rurl)

// print existing cache content

fmt.Println(mgr.String())

{"http://www.google.com/":["http://172.217.6.228/","http://[2607:f8b0:4006:802::2004]/"]}

```

### Use-cases

In service like applications where code needs to deal with lots of

similart URLs it is handy to define local cache of their IP representations

without going through DNS server. For example, in web server where you need

to handle multiple URLs at high rate and all of those URLs have a small

set of unique hostnames, it is beneficial to resolve and cache theose URLs

to avoid flood of requests to DNS server