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87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
package devserver
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/http/pprof"
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"sync"
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"github.com/felixge/fgprof"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/zeromicro/go-zero/core/logx"
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"github.com/zeromicro/go-zero/core/threading"
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"github.com/zeromicro/go-zero/internal/health"
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)
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var (
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once sync.Once
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)
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// Server is inner http server, expose some useful observability information of app.
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// For example health check, metrics and pprof.
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type Server struct {
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config *Config
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server *http.ServeMux
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routes []string
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}
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// NewServer returns a new inner http Server.
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func NewServer(config *Config) *Server {
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return &Server{
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config: config,
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server: http.NewServeMux(),
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}
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}
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func (s *Server) addRoutes() {
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// route path, routes list
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s.handleFunc("/", func(w http.ResponseWriter, _ *http.Request) {
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_ = json.NewEncoder(w).Encode(s.routes)
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})
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// health
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s.handleFunc(s.config.HealthPath, health.CreateHttpHandler())
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// metrics
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if s.config.EnableMetrics {
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s.handleFunc(s.config.MetricsPath, promhttp.Handler().ServeHTTP)
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}
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// pprof
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if s.config.EnablePprof {
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s.handleFunc("/debug/fgprof", fgprof.Handler().(http.HandlerFunc))
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s.handleFunc("/debug/pprof/", pprof.Index)
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s.handleFunc("/debug/pprof/cmdline", pprof.Cmdline)
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s.handleFunc("/debug/pprof/profile", pprof.Profile)
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s.handleFunc("/debug/pprof/symbol", pprof.Symbol)
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s.handleFunc("/debug/pprof/trace", pprof.Trace)
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}
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}
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func (s *Server) handleFunc(pattern string, handler http.HandlerFunc) {
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s.server.HandleFunc(pattern, handler)
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s.routes = append(s.routes, pattern)
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}
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// StartAsync start inner http server background.
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func (s *Server) StartAsync() {
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s.addRoutes()
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threading.GoSafe(func() {
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addr := fmt.Sprintf("%s:%d", s.config.Host, s.config.Port)
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logx.Infof("Starting inner http server at %s", addr)
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if err := http.ListenAndServe(addr, s.server); err != nil {
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logx.Error(err)
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}
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})
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}
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// StartAgent start inner http server by config.
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func StartAgent(c Config) {
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once.Do(func() {
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if c.Enabled {
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s := NewServer(&c)
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s.StartAsync()
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}
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})
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}
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