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package http
import (
"context"
"github.com/spiral/roadrunner"
"github.com/spiral/roadrunner/service/env"
"github.com/spiral/roadrunner/service/http/attributes"
"github.com/spiral/roadrunner/service/rpc"
"net/http"
"sync"
"sync/atomic"
)
const (
// ID contains default svc name.
ID = "http"
// httpKey indicates to php process that it's running under http service
httpKey = "rr_http"
)
// http middleware type.
type middleware func(f http.HandlerFunc) http.HandlerFunc
// Service manages rr, http servers.
type Service struct {
cfg *Config
env env.Environment
lsns []func(event int, ctx interface{})
middleware []middleware
mu sync.Mutex
rr *roadrunner.Server
stopping int32
srv *Handler
http *http.Server
}
// AddMiddleware adds new net/http middleware.
func (s *Service) AddMiddleware(m middleware) {
s.middleware = append(s.middleware, m)
}
// AddListener attaches server event watcher.
func (s *Service) AddListener(l func(event int, ctx interface{})) {
s.lsns = append(s.lsns, l)
}
// Init must return configure svc and return true if svc hasStatus enabled. Must return error in case of
// misconfiguration. Services must not be used without proper configuration pushed first.
func (s *Service) Init(cfg *Config, r *rpc.Service, e env.Environment) (bool, error) {
if !cfg.Enable {
return false, nil
}
s.cfg = cfg
s.env = e
if r != nil {
r.Register(ID, &rpcServer{s})
}
return true, nil
}
// Serve serves the svc.
func (s *Service) Serve() error {
s.mu.Lock()
if s.env != nil {
values, err := s.env.GetEnv()
if err != nil {
return err
}
for k, v := range values {
s.cfg.Workers.SetEnv(k, v)
}
s.cfg.Workers.SetEnv(httpKey, "true")
}
rr := roadrunner.NewServer(s.cfg.Workers)
s.rr = rr
s.srv = &Handler{cfg: s.cfg, rr: s.rr}
s.http = &http.Server{Addr: s.cfg.Address}
s.rr.Listen(s.listener)
s.srv.Listen(s.listener)
if len(s.middleware) == 0 {
s.http.Handler = s.srv
} else {
s.http.Handler = s
}
s.mu.Unlock()
if err := rr.Start(); err != nil {
return err
}
defer rr.Stop()
return s.http.ListenAndServe()
}
// Stop stops the svc.
func (s *Service) Stop() {
if atomic.LoadInt32(&s.stopping) != 0 {
// already stopping
return
}
s.mu.Lock()
defer s.mu.Unlock()
if s.http == nil {
return
}
s.http.Shutdown(context.Background())
}
// middleware handles connection using set of middleware and rr PSR-7 server.
func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
r = attributes.Init(r)
// chaining middleware
f := s.srv.ServeHTTP
for _, m := range s.middleware {
f = m(f)
}
f(w, r)
}
// listener handles service, server and pool events.
func (s *Service) listener(event int, ctx interface{}) {
for _, l := range s.lsns {
l(event, ctx)
}
if event == roadrunner.EventServerFailure {
// underlying rr server is dead
s.Stop()
}
}
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