escpos-go-labels/main.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"time"
    "log"
    "os"
)

// RequestData represents the JSON request body structure
type RequestData struct {
	Date     string `json:"date"`
	Nickname string `json:"nickname"`
}

func main() {
    // Set the output to unbuffered
    log.SetOutput(os.Stdout)

	http.HandleFunc("/print/dnh-label", func(w http.ResponseWriter, r *http.Request) {
		// Only handle POST requests
		if r.Method != http.MethodPost {
			http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
			return
		}

		// Parse JSON request body
		var requestData RequestData
		decoder := json.NewDecoder(r.Body)
		if err := decoder.Decode(&requestData); err != nil {
			http.Error(w, "Invalid JSON request body", http.StatusBadRequest)
			return
		}

		// Validate the date format
		_, err := time.Parse("2006-01-02", requestData.Date)
		if err != nil {
			http.Error(w, "Invalid date format. Please use yyyy-mm-dd", http.StatusBadRequest)
			return
		}

		// Process the request
		response := fmt.Sprintf("Received Date: %s, Nickname: %s", requestData.Date, requestData.Nickname)

		// Send a JSON response
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusOK)
		json.NewEncoder(w).Encode(map[string]string{"message": response})

		// Force immediate output to the console
		log.Println(response)
	})

	// Start the server
	fmt.Println("Server is running on :8080")
	http.ListenAndServe(":8080", nil)
}