105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package uri
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import (
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"database/sql/driver"
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"fmt"
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"net/url"
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"strings"
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"golang.org/x/net/publicsuffix"
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)
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// URI is a validated absolute URI (scheme + host required).
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type URI string
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func Parse(raw string) (URI, error) {
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u, err := url.Parse(raw)
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if err != nil || u.Scheme == "" || u.Host == "" {
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return "", fmt.Errorf("%q is not a valid URI", raw)
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}
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return URI(raw), nil
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}
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func (u URI) String() string { return string(u) }
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func (u *URI) UnmarshalText(text []byte) error {
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parsed, err := Parse(string(text))
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if err != nil {
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return err
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}
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*u = parsed
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return nil
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}
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func (u URI) MarshalText() ([]byte, error) {
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return []byte(u), nil
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}
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func (u *URI) Scan(value any) error {
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var s string
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switch v := value.(type) {
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case string:
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s = v
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case []byte:
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s = string(v)
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default:
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return fmt.Errorf("unsupported type for URI: %T", value)
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}
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parsed, err := Parse(s)
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if err != nil {
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return err
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}
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*u = parsed
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return nil
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}
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func (u URI) Value() (driver.Value, error) {
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return u.String(), nil
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}
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// ExtractDomain returns the eTLD+1 (effective top-level domain plus one
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// label) from a raw URL string. For example:
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//
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// "https://www.googletagmanager.com/gtag/js" → "googletagmanager.com"
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// "https://cdn.segment.io/v1/projects" → "segment.io"
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//
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// Returns an empty string when the URL cannot be parsed or has no valid
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// hostname (e.g. data: URIs, bare IP addresses without a public suffix).
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func ExtractDomain(rawURL string) string {
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u, err := Parse(rawURL)
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if err != nil {
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return ""
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}
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parsed, _ := url.Parse(string(u))
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hostname := strings.ToLower(parsed.Hostname())
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domain, err := publicsuffix.EffectiveTLDPlusOne(hostname)
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if err != nil {
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return ""
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}
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return domain
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}
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