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api.go
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api.go
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package api
import (
"context"
"fmt"
"log"
"net/http"
"time"
"github.com/FrangipaneTeam/terraform-analytic-tool/clients"
"github.com/go-chi/chi"
"github.com/go-chi/chi/middleware"
"github.com/go-chi/render"
)
type Settings struct {
// Address is the address of the api server.
// Default: localhost
Address string `yaml:"address"`
// Port is the port of the api server.
// Default: 8000
Port string `yaml:"port"`
// Token is the token of the api server.
// Default: ""
Token string `yaml:"token"`
*clients.RedisClient
*clients.InfluxDBClient
}
type api struct {
Settings
*clients.RedisClient
*clients.InfluxDBClient
}
func New(aSettings Settings) {
a := new(api)
a.RedisClient = aSettings.RedisClient
a.InfluxDBClient = aSettings.InfluxDBClient
a.Token = aSettings.Token
r := chi.NewRouter()
// Middlewares
r.Use(middleware.RequestID)
r.Use(middleware.RealIP)
r.Use(middleware.Logger)
r.Use(middleware.Recoverer)
if aSettings.Token != "" {
r.Use(a.checkTokenMiddleware)
} else {
log.Default().Println("Warning: no token provided")
}
// Set a timeout value on the request context (ctx), that will signal
// through ctx.Done() that the request has timed out and further
// processing should be stopped.
r.Use(middleware.Timeout(1 * time.Second))
r.Route("/api/v1", func(r chi.Router) {
r.Post("/send", a.apiSendHandler)
})
if aSettings.Address == "" {
aSettings.Address = "localhost"
}
if aSettings.Port == "" {
aSettings.Port = "8000"
}
if err := http.ListenAndServe(fmt.Sprintf("%s:%s", aSettings.Address, aSettings.Port), r); err != nil { //nolint:gosec
panic(err)
}
}
func (a *api) apiSendHandler(w http.ResponseWriter, r *http.Request) {
data := &AnalyticRequest{}
if err := render.Bind(r, data); err != nil {
if err := render.Render(w, r, ErrInvalidRequest(err)); err != nil {
log.Default().Println(err)
}
return
}
if err := a.RedisClient.Publish(context.Background(), "PubSubCavTerraformAnalytics", data).Err(); err != nil {
log.Default().Println(err)
w.WriteHeader(http.StatusInternalServerError)
}
w.WriteHeader(http.StatusOK)
}
// checkTokenMiddleware checks if the token is valid.
func (a *api) checkTokenMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Check if token is valid
if r.Header.Get("Authorization") != a.Token {
if err := render.Render(w, r, ErrInvalidToken); err != nil {
log.Default().Println(err)
}
return
}
next.ServeHTTP(w, r)
})
}