forked from ebhomengo/niki
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package internal
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import (
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"net/url"
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"regexp"
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"strings"
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)
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const (
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defaultHTTPPort = ":80"
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defaultHTTPSPort = ":443"
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)
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// Regular expressions used by the normalizations
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var rxPort = regexp.MustCompile(`(:\d+)/?$`)
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var rxDupSlashes = regexp.MustCompile(`/{2,}`)
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// NormalizeURL will normalize the specified URL
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// This was added to replace a previous call to the no longer maintained purell library:
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// The call that was used looked like the following:
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//
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// url.Parse(purell.NormalizeURL(parsed, purell.FlagsSafe|purell.FlagRemoveDuplicateSlashes))
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//
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// To explain all that was included in the call above, purell.FlagsSafe was really just the following:
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// - FlagLowercaseScheme
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// - FlagLowercaseHost
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// - FlagRemoveDefaultPort
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// - FlagRemoveDuplicateSlashes (and this was mixed in with the |)
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//
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// This also normalizes the URL into its urlencoded form by removing RawPath and RawFragment.
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func NormalizeURL(u *url.URL) {
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lowercaseScheme(u)
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lowercaseHost(u)
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removeDefaultPort(u)
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removeDuplicateSlashes(u)
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u.RawPath = ""
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u.RawFragment = ""
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}
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func lowercaseScheme(u *url.URL) {
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if len(u.Scheme) > 0 {
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u.Scheme = strings.ToLower(u.Scheme)
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}
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}
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func lowercaseHost(u *url.URL) {
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if len(u.Host) > 0 {
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u.Host = strings.ToLower(u.Host)
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}
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}
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func removeDefaultPort(u *url.URL) {
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if len(u.Host) > 0 {
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scheme := strings.ToLower(u.Scheme)
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u.Host = rxPort.ReplaceAllStringFunc(u.Host, func(val string) string {
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if (scheme == "http" && val == defaultHTTPPort) || (scheme == "https" && val == defaultHTTPSPort) {
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return ""
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}
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return val
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})
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}
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}
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func removeDuplicateSlashes(u *url.URL) {
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if len(u.Path) > 0 {
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u.Path = rxDupSlashes.ReplaceAllString(u.Path, "/")
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}
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}
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