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middleware/proxy: absorb httpproxy (#481)

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* middleware/proxy: absorb httpproxy

Move the httproxy into proxy. This adds and Exchanger interface which
is used to exchange the messages with the upstream.

The https_google upstream will re-resolve itself and update the upstream
hosts used every 300s.

* Remove and add TODO
This commit is contained in:
Miek Gieben
2017-02-06 19:32:48 +00:00
committed by GitHub
parent 77f957d443
commit 123a76c91e
21 changed files with 466 additions and 827 deletions
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21
middleware/proxy/dns.go
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@@ -12,23 +12,20 @@ import (
type dnsEx struct {
Timeout time.Duration
Address string // address/name of this upstream
group *singleflight.Group
group *singleflight.Group
}
func newDNSEx(address string) *dnsEx {
return &dnsEx{Address: address, group: new(singleflight.Group), Timeout: defaultTimeout * time.Second}
func newDNSEx() *dnsEx {
return &dnsEx{group: new(singleflight.Group), Timeout: defaultTimeout * time.Second}
}
func (d *dnsEx) OnStartup() error { return nil }
func (d *dnsEx) OnShutdown() error { return nil }
func (d *dnsEx) SetUpstream(u Upstream) error { return nil }
func (d *dnsEx) Protocol() protocol { return dnsProto }
func (g *dnsEx) Protocol() string { return "dns" }
func (d *dnsEx) OnShutdown(p *Proxy) error { return nil }
func (d *dnsEx) OnStartup(p *Proxy) error { return nil }
// Exchange implements the Exchanger interface.
func (d *dnsEx) Exchange(state request.Request) (*dns.Msg, error) {
co, err := net.DialTimeout(state.Proto(), d.Address, d.Timeout)
func (d *dnsEx) Exchange(addr string, state request.Request) (*dns.Msg, error) {
co, err := net.DialTimeout(state.Proto(), addr, d.Timeout)
if err != nil {
return nil, err
}
@@ -101,5 +98,3 @@ func exchange(m *dns.Msg, co net.Conn) (dns.Msg, error) {
}
return *r, err
}
const dnsProto protocol = "dns"