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107 lines
2.5 KiB
Go
107 lines
2.5 KiB
Go
package utils
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import (
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"golang.org/x/net/publicsuffix"
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"strconv"
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"strings"
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)
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// SplitDomainPort takes an input host and default port then outputs the domain,
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// port and true or empty values and false if the split failed
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func SplitDomainPort(host string, defaultPort int) (domain string, port int, ok bool) {
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a := strings.SplitN(host, ":", 2)
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switch len(a) {
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case 2:
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domain = a[0]
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p, err := strconv.Atoi(a[1])
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port = p
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ok = err == nil
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case 1:
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domain = a[0]
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port = defaultPort
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ok = true
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}
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return
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}
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// GetDomainWithoutPort takes an input domain + port and outputs the domain
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// without the port.
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//
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// example.com:443 => example.com
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func GetDomainWithoutPort(domain string) string {
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// if a valid index isn't found then return false
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n := strings.LastIndexByte(domain, ':')
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if n == -1 {
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return domain
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}
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return domain[:n]
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}
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// ReplaceSubdomainWithWildcard returns the domain with the subdomain replaced
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// with a wildcard '*' character.
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//
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// www.example.com => *.example.com
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func ReplaceSubdomainWithWildcard(domain string) (string, bool) {
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// if a valid index isn't found then return false
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n := strings.IndexByte(domain, '.')
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if n == -1 {
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return "", false
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}
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return "*" + domain[n:], true
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}
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// GetParentDomain returns the parent domain stripping off the subdomain.
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//
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// www.example.com => example.com
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func GetParentDomain(domain string) (string, bool) {
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// if a valid index isn't found then return false
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n := strings.IndexByte(domain, '.')
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if n == -1 {
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return "", false
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}
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return domain[n+1:], true
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}
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// GetTopFqdn returns the top domain stripping off multiple layers of subdomains.
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//
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// hello.world.example.com => example.com
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func GetTopFqdn(domain string) (string, bool) {
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out, err := publicsuffix.EffectiveTLDPlusOne(domain)
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return out, err == nil
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}
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// SplitHostPath extracts the host/path from the input
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func SplitHostPath(a string) (host, path string) {
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// check if source has path
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n := strings.IndexByte(a, '/')
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if n == -1 {
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// set host then path to /
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host = a
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path = "/"
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} else {
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// set host then custom path
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host = a[:n]
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path = a[n:] // this required to keep / at the start of the path
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}
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return
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}
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// SplitHostPathQuery extracts the host/path?query from the input
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func SplitHostPathQuery(a string) (host, path, query string) {
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host, path = SplitHostPath(a)
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if path == "/" {
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n := strings.IndexByte(host, '?')
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if n != -1 {
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query = host[n+1:]
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host = host[:n]
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}
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return
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}
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n := strings.IndexByte(path, '?')
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if n != -1 {
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query = path[n+1:]
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path = path[:n] // reassign happens after
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}
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return
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}
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