/
server.go
174 lines (147 loc) · 5.03 KB
/
server.go
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package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"github.com/CAFxX/httpcompression"
"github.com/felixge/httpsnoop"
"github.com/ipfs/boxo/routing/http/client"
"github.com/ipfs/boxo/routing/http/server"
logging "github.com/ipfs/go-log/v2"
"github.com/libp2p/go-libp2p"
dht "github.com/libp2p/go-libp2p-kad-dht"
"github.com/libp2p/go-libp2p/core/host"
"github.com/libp2p/go-libp2p/core/routing"
rcmgr "github.com/libp2p/go-libp2p/p2p/host/resource-manager"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/rs/cors"
metrics "github.com/slok/go-http-metrics/metrics/prometheus"
"github.com/slok/go-http-metrics/middleware"
middlewarestd "github.com/slok/go-http-metrics/middleware/std"
)
var logger = logging.Logger(name)
func withRequestLogger(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m := httpsnoop.CaptureMetrics(next, w, r)
logger.Debugw(r.Method, "url", r.URL, "host", r.Host, "code", m.Code, "duration", m.Duration, "written", m.Written, "ua", r.UserAgent(), "referer", r.Referer())
})
}
func start(ctx context.Context, listenAddress string, runAcceleratedDHTClient bool, contentEndpoints, peerEndpoints, ipnsEndpoints []string) error {
h, err := newHost(runAcceleratedDHTClient)
if err != nil {
return err
}
var dhtRouting routing.Routing
if runAcceleratedDHTClient {
wrappedDHT, err := newBundledDHT(ctx, h)
if err != nil {
return err
}
dhtRouting = wrappedDHT
} else {
standardDHT, err := dht.New(ctx, h, dht.Mode(dht.ModeClient), dht.BootstrapPeers(dht.GetDefaultBootstrapPeerAddrInfos()...))
if err != nil {
return err
}
dhtRouting = standardDHT
}
crRouters, err := getCombinedRouting(contentEndpoints, dhtRouting)
if err != nil {
return err
}
prRouters, err := getCombinedRouting(peerEndpoints, dhtRouting)
if err != nil {
return err
}
ipnsRouters, err := getCombinedRouting(ipnsEndpoints, dhtRouting)
if err != nil {
return err
}
_, port, err := net.SplitHostPort(listenAddress)
if err != nil {
return err
}
log.Printf("Starting %s %s\n", name, version)
log.Printf("Listening on %s", listenAddress)
log.Printf("Delegated Routing API on http://127.0.0.1:%s/routing/v1", port)
mdlw := middleware.New(middleware.Config{
Recorder: metrics.NewRecorder(metrics.Config{Prefix: "someguy"}),
})
handler := server.Handler(&composableRouter{
providers: crRouters,
peers: prRouters,
ipns: ipnsRouters,
})
// Add CORS.
handler = cors.New(cors.Options{
AllowedOrigins: []string{"*"},
AllowedMethods: []string{http.MethodGet, http.MethodOptions},
MaxAge: 600,
}).Handler(handler)
// Add compression.
compress, err := httpcompression.DefaultAdapter()
if err != nil {
return err
}
handler = compress(handler)
// Add metrics.
handler = middlewarestd.Handler("/", mdlw, handler)
// Add request logging.
handler = withRequestLogger(handler)
http.Handle("/debug/metrics/prometheus", promhttp.Handler())
http.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Client: %s\n", name)
fmt.Fprintf(w, "Version: %s\n", version)
})
http.Handle("/", handler)
server := &http.Server{Addr: listenAddress, Handler: nil}
return server.ListenAndServe()
}
func newHost(highOutboundLimits bool) (host.Host, error) {
if !highOutboundLimits {
return libp2p.New()
}
defaultLimits := rcmgr.DefaultLimits
libp2p.SetDefaultServiceLimits(&defaultLimits)
// Outbound conns and FDs are set very high to allow for the accelerated DHT client to (re)load its routing table.
// Currently it doesn't gracefully handle RM throttling--once it does we can lower these.
// High outbound conn limits are considered less of a DoS risk than high inbound conn limits.
// Also note that, due to the behavior of the accelerated DHT client, we don't need many streams, just conns.
if minOutbound := 65536; defaultLimits.SystemBaseLimit.ConnsOutbound < minOutbound {
defaultLimits.SystemBaseLimit.ConnsOutbound = minOutbound
if defaultLimits.SystemBaseLimit.Conns < defaultLimits.SystemBaseLimit.ConnsOutbound {
defaultLimits.SystemBaseLimit.Conns = defaultLimits.SystemBaseLimit.ConnsOutbound
}
}
if minFD := 4096; defaultLimits.SystemBaseLimit.FD < minFD {
defaultLimits.SystemBaseLimit.FD = minFD
}
defaultLimitConfig := defaultLimits.AutoScale()
rm, err := rcmgr.NewResourceManager(rcmgr.NewFixedLimiter(defaultLimitConfig))
if err != nil {
return nil, err
}
h, err := libp2p.New(libp2p.ResourceManager(rm))
if err != nil {
return nil, err
}
return h, nil
}
func getCombinedRouting(endpoints []string, dht routing.Routing) (router, error) {
if len(endpoints) == 0 {
return sanitizeRouter{libp2pRouter{routing: dht}}, nil
}
var routers []router
for _, endpoint := range endpoints {
drclient, err := client.New(endpoint, client.WithUserAgent(userAgent))
if err != nil {
return nil, err
}
routers = append(routers, clientRouter{Client: drclient})
}
return sanitizeRouter{parallelRouter{
routers: append(routers, libp2pRouter{routing: dht}),
}}, nil
}