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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(Module{})
}
type Module struct {
URL string `json:"url"`
AllowedDomains []string `json:"allowedDomains"`
BlockedDomains []string `json:"blockedDomains"`
active bool
}
func (Module) ModuleInfo() flyscrape.ModuleInfo {
return flyscrape.ModuleInfo{
ID: "domainfilter",
New: func() flyscrape.Module { return new(Module) },
}
}
func (m *Module) Provision(v flyscrape.Context) {
if m.URL == "" {
return
}
if u, err := url.Parse(m.URL); err == nil {
m.AllowedDomains = append(m.AllowedDomains, u.Host())
}
}
func (m *Module) ValidateRequest(r *flyscrape.Request) bool {
if m.disabled() {
return true
}
u, err := url.Parse(r.URL)
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
}
func (m *Module) disabled() bool {
return len(m.AllowedDomains) == 0 && len(m.BlockedDomains) == 0
}
var (
_ flyscrape.RequestValidator = (*Module)(nil)
_ flyscrape.Provisioner = (*Module)(nil)
)
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