first commit

.gitignore

@@ -0,0 +1,32 @@
+# Compiled binaries
+*.exe
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+
+# Build output directory
+bin/
+dist/
+
+# Test artifacts
+coverage.txt
+
+# Go workspace files
+go.work
+
+# System metadata
+.DS_Store
+s._*
+.Spotlight-V100
+.Trashes
+
+# Thumbnail cache
+Thumbs.db
+
+# IDE/Editor (VS Code example)
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+*.code-workspace

go.mod

@@ -0,0 +1,3 @@
+module singefile-server
+
+go 1.24

main.go

@@ -0,0 +1,228 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+// Config holds the application configuration
+type Config struct {
+	Port        string `json:"port"`
+	AuthToken   string `json:"authToken"`
+	SaveBaseDir string `json:"saveBaseDir"`
+	DataField   string `json:"dataField"`
+	URLField    string `json:"urlField"`
+}
+
+// Default returns a Config with default values
+func (c *Config) Default() Config {
+	return Config{
+		Port:        "3600",
+		AuthToken:   "change-me",
+		SaveBaseDir: "./archives",
+		DataField:   "data",
+		URLField:    "url",
+	}
+}
+
+func main() {
+	// Define command-line flags
+	configFile := flag.String("config", "", "Path to config file (JSON)")
+	flag.Parse()
+
+	// Load configuration
+	config := loadConfig(*configFile)
+
+	// Create the base directory if it doesn't exist
+	if err := os.MkdirAll(config.SaveBaseDir, 0755); err != nil {
+		log.Fatalf("Failed to create archives directory: %v", err)
+	}
+
+	// Set up HTTP routes
+	http.HandleFunc("/archive", func(w http.ResponseWriter, r *http.Request) {
+		handleArchive(w, r, config)
+	})
+
+	// Start the server
+	log.Printf("Server starting on port %s", config.Port)
+	log.Fatal(http.ListenAndServe(":"+config.Port, nil))
+}
+
+// loadConfig loads configuration from file or uses defaults
+func loadConfig(configFile string) Config {
+	var config Config
+	config = config.Default()
+
+	if configFile != "" {
+		file, err := os.Open(configFile)
+		if err != nil {
+			log.Printf("Failed to open config file: %v, using defaults", err)
+			return config
+		}
+		defer func(file *os.File) {
+			err := file.Close()
+			if err != nil {
+				log.Printf("Failed to close config file: %v", err)
+			}
+		}(file)
+
+		decoder := json.NewDecoder(file)
+		if err := decoder.Decode(&config); err != nil {
+			log.Printf("Failed to parse config file: %v, using defaults", err)
+			return config.Default()
+		}
+	}
+
+	// Log the configuration being used
+	log.Printf("Using configuration: Port=%s, SaveBaseDir=%s", config.Port, config.SaveBaseDir)
+	return config
+}
+
+func handleArchive(w http.ResponseWriter, r *http.Request, config Config) {
+	// Check if request method is POST
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	// Check bearer token authentication
+	authHeader := r.Header.Get("Authorization")
+	if !validateBearerToken(authHeader, config.AuthToken) {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	// Parse multipart form
+	err := r.ParseMultipartForm(10 << 20) // 10 MB max memory
+	if err != nil {
+		http.Error(w, "Failed to parse multipart form: "+err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	// Extract URL from form
+	url := r.FormValue(config.URLField)
+	if url == "" {
+		http.Error(w, "URL field is required", http.StatusBadRequest)
+		return
+	}
+
+	// Get the file from form data
+	file, fileHeader, err := r.FormFile(config.DataField)
+	if err != nil {
+		http.Error(w, "Failed to get file from form: "+err.Error(), http.StatusBadRequest)
+		return
+	}
+	defer func(file io.ReadCloser) {
+		err := file.Close()
+		if err != nil {
+			log.Println("Failed to close multipart form file")
+		}
+	}(file)
+
+	// Read file content
+	contentBytes, err := io.ReadAll(file)
+	if err != nil {
+		http.Error(w, "Failed to read file content: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if len(contentBytes) == 0 {
+		http.Error(w, "Uploaded file is empty", http.StatusBadRequest)
+		return
+	}
+
+	// Determine the file path to save to
+	var filePath string
+
+	if fileHeader != nil && fileHeader.Filename != "" {
+		// Use the uploaded filename
+		// Sanitize the filename to make it safe for filesystem
+		filename := sanitizeFilename(fileHeader.Filename)
+		filePath = filepath.Join(config.SaveBaseDir, filename)
+
+		// Make sure the file has an .html extension if it doesn't already have one
+		if !strings.HasSuffix(strings.ToLower(filePath), ".html") {
+			filePath += ".html"
+		}
+	} else {
+		// Fall back to URL-based filename if no uploaded filename is available
+		filePath, err = getSanitizedFilePath(url, config.SaveBaseDir)
+		if err != nil {
+			http.Error(w, "Failed to process URL: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+	}
+
+	// Save the content to the filesystem
+	if err := os.WriteFile(filePath, contentBytes, 0644); err != nil {
+		http.Error(w, "Failed to save file: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Return success response as JSON
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusCreated) // Using 201 as it's one of the expected success codes
+
+	// Create a response struct and marshal to JSON
+	response := map[string]string{
+		"message": "Page archived successfully",
+		"path":    filePath,
+	}
+
+	if err := json.NewEncoder(w).Encode(response); err != nil {
+		log.Printf("Error encoding response: %v", err)
+	}
+}
+
+// validateBearerToken checks if the authorization header contains a valid bearer token
+func validateBearerToken(authHeader string, authToken string) bool {
+	// Check if the header starts with "Bearer "
+	if !strings.HasPrefix(authHeader, "Bearer ") {
+		return false
+	}
+
+	// Extract the token
+	token := strings.TrimPrefix(authHeader, "Bearer ")
+
+	// Validate the token
+	return token == authToken
+}
+
+// getSanitizedFilePath converts a URL into a safe flat filesystem path
+func getSanitizedFilePath(url string, saveBaseDir string) (string, error) {
+	// Remove protocol (http:// or https://)
+	url = regexp.MustCompile(`^https?://`).ReplaceAllString(url, "")
+
+	// Replace all slashes and invalid characters with underscores
+	url = regexp.MustCompile(`[/<>:"\\|?*]`).ReplaceAllString(url, "_")
+
+	// Create a flat filename
+	fileName := url
+
+	// Ensure the directory exists
+	if err := os.MkdirAll(saveBaseDir, 0755); err != nil {
+		return "", fmt.Errorf("failed to create directory: %w", err)
+	}
+
+	// Make sure the file has an .html extension
+	fullPath := filepath.Join(saveBaseDir, fileName)
+	if !strings.HasSuffix(fullPath, ".html") {
+		fullPath += ".html"
+	}
+
+	return fullPath, nil
+}
+
+// sanitizeFilename cleans a filename to make it safe for filesystem storage
+func sanitizeFilename(filename string) string {
+	// Replace any potentially unsafe characters with underscores
+	return regexp.MustCompile(`[/<>:"\\|?*]`).ReplaceAllString(filename, "_")
+}