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api.go
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api.go
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package api
import (
"net/http"
"path/filepath"
"sync"
"time"
"git.aqq.me/go/app/appconf"
"git.aqq.me/go/app/applog"
"git.aqq.me/go/app/event"
"github.com/go-chi/chi"
"github.com/go-chi/chi/middleware"
"github.com/go-chi/cors"
oas "github.com/hypnoglow/oas2"
"github.com/iph0/conf"
jsoniter "github.com/json-iterator/go"
"github.com/kak-tus/ilene/model"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var obj *Type
func init() {
event.Init.AddHandler(
func() error {
cnfMap := appconf.GetConfig()["api"]
var cnf apiConfig
err := conf.Decode(cnfMap, &cnf)
if err != nil {
return err
}
srv := &http.Server{
Addr: cnf.Addr,
}
obj = &Type{
cnf: cnf,
enc: jsoniter.Config{UseNumber: true}.Froze(),
lock: &sync.Mutex{},
log: applog.GetLogger().Sugar(),
mdl: model.Get(),
srv: srv,
tick: time.NewTicker(time.Second * 30),
}
doc, err := oas.LoadFile(filepath.Join(cnf.DataDir, cnf.Schema))
if err != nil {
return err
}
handlers := oas.OperationHandlers{
"streams": http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
obj.streams(w, r)
}),
}
crs := cors.New(cors.Options{
AllowedOrigins: []string{"*"},
AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
AllowedHeaders: []string{"Accept", "Content-Type"},
AllowCredentials: true,
MaxAge: 300,
})
baseRouter := chi.NewRouter()
baseRouter.Use(crs.Handler)
baseRouter.Use(middleware.SetHeader("Content-Type", "application/json"))
dir := http.Dir(filepath.Join(cnf.DataDir, cnf.HTTPDir))
baseRouter.Mount("/*", http.StripPrefix("/", http.FileServer(dir)))
baseRouter.Mount("/metrics", promhttp.Handler())
errReqHandler := obj.middlewareRequestErrorHandler()
queryValidator := oas.QueryValidator(errReqHandler)
bodyValidator := oas.BodyValidator(errReqHandler)
errRespHandler := obj.middlewareResponseErrorHandler()
respValidator := oas.ResponseBodyValidator(errRespHandler)
router, err := oas.NewRouter(
doc,
handlers,
oas.Base(oas.ChiAdapter(baseRouter)),
oas.Use(queryValidator),
oas.Use(bodyValidator),
oas.Use(obj.middlewarePostResponse()),
oas.Use(respValidator),
)
if err != nil {
return err
}
obj.srv.Handler = router
obj.log.Info("Started API")
return nil
},
)
event.Stop.AddHandler(
func() error {
obj.log.Info("Stop API")
err := obj.srv.Close()
if err != nil {
return err
}
obj.tick.Stop()
obj.lock.Lock()
obj.log.Info("Stopped API")
return nil
},
)
}
// GetAPI return instance
func GetAPI() *Type {
return obj
}
// Start API
func (a *Type) Start() {
a.metrics()
err := a.srv.ListenAndServe()
if err != nil && err != http.ErrServerClosed {
a.log.Error(err)
}
}
func (a *Type) streams(w http.ResponseWriter, r *http.Request) {
info := a.mdl.ListStreams()
err := jsoniter.NewEncoder(w).Encode(info)
if err != nil {
a.log.Error(err)
}
}