Add a pcap-split tool

internal/web/server.go

@@ -22,21 +22,28 @@ type Tool struct {
 
 var tools = []Tool{
 	{Name: "Hex → pcap", Path: "/hex2pcap", Description: "Build a pcap file from hex-encoded layer 2, layer 3 and payload bytes, optionally fixing IP lengths and checksums."},
+	{Name: "Split pcap", Path: "/split", Description: "Split a pcap file into several files by packet count or file size, downloaded as a zip."},
+}
+
+// Config holds server settings.
+type Config struct {
+	MaxUploadBytes int64 // largest accepted file upload
 }
 
 // Server is the HTTP handler for the whole application.
 type Server struct {
+	cfg   Config
 	mux   *http.ServeMux
 	pages map[string]*template.Template
 }
 
 // New parses the templates and sets up the routes.
-func New() (*Server, error) {
-	s := &Server{mux: http.NewServeMux(), pages: map[string]*template.Template{}}
+func New(cfg Config) (*Server, error) {
+	s := &Server{cfg: cfg, mux: http.NewServeMux(), pages: map[string]*template.Template{}}
 
 	// Each page is parsed together with the shared layout so pages can define
 	// their own "title" and "content" blocks.
-	for _, page := range []string{"index.html", "hex2pcap.html"} {
+	for _, page := range []string{"index.html", "hex2pcap.html", "split.html"} {
 		t, err := template.New(page).ParseFS(assets, "templates/layout.html", "templates/"+page)
 		if err != nil {
 			return nil, err
@@ -52,6 +59,8 @@ func New() (*Server, error) {
 	s.mux.HandleFunc("GET /{$}", s.handleIndex)
 	s.mux.HandleFunc("GET /hex2pcap", s.handleHex2PcapForm)
 	s.mux.HandleFunc("POST /hex2pcap", s.handleHex2Pcap)
+	s.mux.HandleFunc("GET /split", s.handleSplitForm)
+	s.mux.HandleFunc("POST /split", s.handleSplit)
 	return s, nil
 }