AdGuardHome/internal/home/httpclient.go

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package home
import (
"context"
"crypto/tls"
"net"
"net/http"
"net/url"
"time"
)
// httpClient returns a new HTTP client that uses the AdGuard Home's own DNS
// server for resolving hostnames. The resulting client should not be used
// until [Context.dnsServer] is initialized.
//
// TODO(a.garipov, e.burkov): This is rather messy. Refactor.
func httpClient() (c *http.Client) {
// Do not use Context.dnsServer.DialContext directly in the struct literal
// below, since Context.dnsServer may be nil when this function is called.
dialContext := func(ctx context.Context, network, addr string) (conn net.Conn, err error) {
return Context.dnsServer.DialContext(ctx, network, addr)
}
return &http.Client{
// TODO(a.garipov): Make configurable.
Timeout: time.Minute * 5,
Transport: &http.Transport{
DialContext: dialContext,
Proxy: httpProxy,
TLSClientConfig: &tls.Config{
RootCAs: Context.tlsRoots,
CipherSuites: Context.tlsCipherIDs,
MinVersion: tls.VersionTLS12,
},
},
}
}
// httpProxy returns parses and returns an HTTP proxy URL from the config, if
// any.
func httpProxy(_ *http.Request) (u *url.URL, err error) {
if config.ProxyURL == "" {
return nil, nil
}
return url.Parse(config.ProxyURL)
}