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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 proxy
import (
"crypto/tls"
"math/rand"
"net/http"
"net/url"
"github.com/philippta/flyscrape"
)
func init() {
flyscrape.RegisterModule(Module{})
}
type Module struct {
Proxies []string `json:"proxies"`
transports []*http.Transport
}
func (Module) ModuleInfo() flyscrape.ModuleInfo {
return flyscrape.ModuleInfo{
ID: "proxy",
New: func() flyscrape.Module { return new(Module) },
}
}
func (m *Module) Provision(ctx flyscrape.Context) {
if m.disabled() {
return
}
for _, purl := range m.Proxies {
if parsed, err := url.Parse(purl); err == nil {
m.transports = append(m.transports, &http.Transport{
Proxy: http.ProxyURL(parsed),
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
})
}
}
}
func (m *Module) AdaptTransport(t http.RoundTripper) http.RoundTripper {
if m.disabled() {
return t
}
return flyscrape.RoundTripFunc(func(r *http.Request) (*http.Response, error) {
transport := m.transports[rand.Intn(len(m.transports))]
return transport.RoundTrip(r)
})
}
func (m *Module) disabled() bool {
return len(m.Proxies) == 0
}
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