Initial Release

2026-05-24 19:58:20 -07:00
commit d7b7e01e92
28 changed files with 4273 additions and 0 deletions
@@ -0,0 +1,88 @@
+package env
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+const (
+	MAX_FORM_BYTES        = 1 << 24
+	FILE_MODE             = os.FileMode(0770)
+	STICKERBOARD_FILENAME = "stickerboard.webp"
+)
+
+var (
+	HTTP_TLS          *tls.Config                                   // http: TLS Configuration
+	HTTP_PROXY_HEADER = envString("HTTP_PROXY_HEADER", "")          // http: Retrieve IP Address from Following HTTP Header
+	HTTP_ADDRESS      = envString("HTTP_ADDRESS", "localhost:8080") // http: Address to Listen for Requests on
+	TLS_ENABLED       = envString("TLS_ENABLED", "false") == "true" // http: Enable TLS?
+	TLS_CERT          = envString("TLS_CERT", "tls_crt.pem")        // http: Path to TLS Certificate
+	TLS_KEY           = envString("TLS_KEY", "tls_key.pem")         // http: Path to TLS Key
+	TLS_CA            = envString("TLS_CA", "tls_ca.pem")           // http: Path to TLS CA Bundle
+	DATA_DIRECTORY    = envString("DATA_DIRECTORY", "data")         // env: Data Directory
+)
+
+func init() {
+	// Create Data Directory
+	if err := os.MkdirAll(DATA_DIRECTORY, FILE_MODE); err != nil {
+		log.Fatalln("[env/data] Create Directory Error:", err)
+	}
+
+	// Load and Parse TLS Configuration from Disk
+	if TLS_ENABLED {
+		cert, err := tls.LoadX509KeyPair(TLS_CERT, TLS_KEY)
+		if err != nil {
+			log.Fatalln("[env/tls] Cannot Load Keypair", err)
+		}
+		caBytes, err := os.ReadFile(TLS_CA)
+		if err != nil {
+			log.Fatalln("[env/tls] Cannot Read CA File", err)
+		}
+		caPool := x509.NewCertPool()
+		if !caPool.AppendCertsFromPEM(caBytes) {
+			log.Fatalln("[env/tls] Cannot Append Certificates")
+		}
+		HTTP_TLS = &tls.Config{
+			Certificates: []tls.Certificate{cert},
+			ClientCAs:    caPool,
+			MinVersion:   tls.VersionTLS13,
+			MaxVersion:   tls.VersionTLS13,
+			CipherSuites: []uint16{
+				tls.TLS_AES_128_GCM_SHA256,
+				tls.TLS_AES_256_GCM_SHA384,
+				tls.TLS_CHACHA20_POLY1305_SHA256,
+			},
+		}
+	}
+}
+
+// Reads String from Environment
+func envString(key, defaultValue string) string {
+	systemValue := os.Getenv(key)
+	if systemValue == "" {
+		if defaultValue == "\x00" {
+			fmt.Printf("[env] Environment Variable '%s' is undefined\n", key)
+			os.Exit(2)
+		}
+		return defaultValue
+	}
+	return systemValue
+}
+
+// Read Number from Environment
+func envNumber(key string, defaultValue int) int {
+	systemValue := os.Getenv(key)
+	if systemValue == "" {
+		return defaultValue
+	}
+	v, err := strconv.Atoi(systemValue)
+	if err != nil {
+		fmt.Printf("[env] Environment Variable '%s' is not a integer: %s\n", key, err)
+		os.Exit(2)
+	}
+	return v
+}