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server.go
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server.go
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package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"time"
"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"
"github.com/libp2p/go-libp2p/p2p/net/connmgr"
"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())
})
}
type config struct {
listenAddress string
acceleratedDHTClient bool
contentEndpoints []string
peerEndpoints []string
ipnsEndpoints []string
connMgrLow int
connMgrHi int
connMgrGrace time.Duration
maxMemory uint64
maxFD int
}
func start(ctx context.Context, cfg *config) error {
h, err := newHost(cfg)
if err != nil {
return err
}
var dhtRouting routing.Routing
if cfg.acceleratedDHTClient {
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(cfg.contentEndpoints, dhtRouting)
if err != nil {
return err
}
prRouters, err := getCombinedRouting(cfg.peerEndpoints, dhtRouting)
if err != nil {
return err
}
ipnsRouters, err := getCombinedRouting(cfg.ipnsEndpoints, dhtRouting)
if err != nil {
return err
}
_, port, err := net.SplitHostPort(cfg.listenAddress)
if err != nil {
return err
}
log.Printf("Starting %s %s\n", name, version)
log.Printf("Listening on %s", cfg.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: cfg.listenAddress, Handler: nil}
return server.ListenAndServe()
}
func newHost(cfg *config) (host.Host, error) {
cmgr, err := connmgr.NewConnManager(cfg.connMgrLow, cfg.connMgrHi, connmgr.WithGracePeriod(cfg.connMgrGrace))
if err != nil {
return nil, err
}
rcmgr, err := makeResourceMgrs(cfg.maxMemory, cfg.maxFD, cfg.connMgrHi)
if err != nil {
return nil, err
}
h, err := libp2p.New(
libp2p.ConnectionManager(cmgr),
libp2p.ResourceManager(rcmgr),
)
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
}