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fix: change method to enable cors

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This commit is contained in:
Sosokker 2025-02-02 07:44:16 +07:00
parent 7eccf2e462
commit 525cccf344
3 changed files with 19 additions and 21 deletions
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2
cmd/go.mod
View File

@ -2,4 +2,4 @@ module github.com/Sosokker/openweather-dashboard
go 1.23.5 go 1.23.5
require github.com/joho/godotenv v1.5.1 require github.com/rs/cors v1.11.1

4
cmd/go.sum
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@ -1,2 +1,2 @@
github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0= github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4= github.com/rs/cors v1.11.1/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=

34
cmd/main.go
View File

@ -11,7 +11,7 @@ import (
"strconv" "strconv"
"strings" "strings"
"github.com/joho/godotenv" "github.com/rs/cors"
) )
type Coordinate struct { type Coordinate struct {
@ -56,15 +56,8 @@ func (d *DataEntry) normalizeRainPerHour(min, max float32) {
} }
func loadEnv() string { func loadEnv() string {
apiKeys, err := godotenv.Read() apiKey := os.Getenv("OPENWEATHERMAP_API_KEY")
if err != nil {
log.Fatalln("Error: can't load environment or .env file")
}
apiKey, exist := apiKeys["OPENWEATHERMAP_API_KEY"]
if !exist {
log.Fatalln("Error: OPENWEATHERMAP_API_KEY does not existed!")
}
if strings.TrimSpace(apiKey) == "" { if strings.TrimSpace(apiKey) == "" {
log.Fatalln("Error: OPENWEATHERMAP_API_KEY can't be empty!") log.Fatalln("Error: OPENWEATHERMAP_API_KEY can't be empty!")
} }
@ -132,20 +125,14 @@ func readCoordData(filepath string, coordCh chan<- Coordinate) {
close(coordCh) close(coordCh)
} }
// https://www.stackhawk.com/blog/golang-cors-guide-what-it-is-and-how-to-enable-it/
func enableCors(w *http.ResponseWriter) {
(*w).Header().Set("Access-Control-Allow-Origin", "*")
}
// lat, lon, rain+place // lat, lon, rain+place
// state-id, rainfall (scale 100) // state-id, rainfall (scale 100)
func rawDataHandler(w http.ResponseWriter, r *http.Request) { func rawDataHandler(w http.ResponseWriter, r *http.Request) {
enableCors(&w)
apiKey := loadEnv() apiKey := loadEnv()
coordCh := make(chan Coordinate) coordCh := make(chan Coordinate)
go readCoordData("data/data.csv", coordCh) go readCoordData("data/test.csv", coordCh)
var max float32 = 0.0 var max float32 = 0.0
var min float32 = 10000000.0 var min float32 = 10000000.0
@ -178,6 +165,17 @@ func rawDataHandler(w http.ResponseWriter, r *http.Request) {
} }
func main() { func main() {
http.HandleFunc("/api/data", rawDataHandler) // /api/data?scale=100 // https://www.stackhawk.com/blog/golang-cors-guide-what-it-is-and-how-to-enable-it/
log.Fatal(http.ListenAndServe(":8080", nil)) mux := http.NewServeMux()
mux.HandleFunc("/api/data", rawDataHandler) // /api/data?scale=100
handler := cors.Default().Handler(mux)
c := cors.New(cors.Options{
AllowedOrigins: []string{"*"},
AllowCredentials: true,
AllowedHeaders: []string{"Authorization", "Content-Type", "Access-Control-Allow-Origin"},
AllowedMethods: []string{"GET", "UPDATE", "PUT", "POST", "DELETE"},
})
handler = c.Handler(handler)
log.Fatal(http.ListenAndServe(":8080", handler))
} }