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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package domainfilter
import (
"github.com/nlnwa/whatwg-url/url"
"github.com/philippta/flyscrape"
)
func init() {
flyscrape.RegisterModule(new(Module))
}
type Module struct {
URL string `json:"url"`
AllowedDomains []string `json:"allowedDomains"`
BlockedDomains []string `json:"blockedDomains"`
}
func (m *Module) ID() string {
return "domainfilter"
}
func (m *Module) OnLoad(v flyscrape.Visitor) {
if u, err := url.Parse(m.URL); err == nil {
m.AllowedDomains = append(m.AllowedDomains, u.Host())
}
}
func (m *Module) CanRequest(rawurl string, depth int) bool {
u, err := url.Parse(rawurl)
if err != nil {
return false
}
host := u.Host()
ok := false
for _, domain := range m.AllowedDomains {
if domain == "*" || host == domain {
ok = true
break
}
}
for _, domain := range m.BlockedDomains {
if host == domain {
ok = false
break
}
}
return ok
}
var (
_ flyscrape.Module = (*Module)(nil)
_ flyscrape.CanRequest = (*Module)(nil)
_ flyscrape.OnLoad = (*Module)(nil)
)
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