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package web
import (
"context"
"embed"
"fmt"
"html/template"
"net"
"net/http"
"strings"
"envault/vault"
)
//go:embed templates
var templateFiles embed.FS
//go:embed static
var staticFiles embed.FS
// Server runs the HTMX management UI.
type Server struct {
Vault *vault.Vault
VaultPath string
Password string
Port int
Bind string
srv *http.Server
tmpl *template.Template
}
type pageData struct {
Projects []string
}
// SecretAreaData is passed to the secret-area and secret-rows templates.
type SecretAreaData struct {
Project string
Secrets []SecretRow
}
// SecretRow holds a key name for the secrets table.
type SecretRow struct {
Key string
}
// RevealData is passed to reveal-value and edit-row templates.
type RevealData struct {
Project string
Key string
Value string
}
// Start builds the mux and begins serving.
func (s *Server) Start() error {
funcs := template.FuncMap{
"dict": func(pairs ...any) (map[string]any, error) {
if len(pairs)%2 != 0 {
return nil, fmt.Errorf("dict requires an even number of arguments")
}
m := make(map[string]any, len(pairs)/2)
for i := 0; i < len(pairs); i += 2 {
k, ok := pairs[i].(string)
if !ok {
return nil, fmt.Errorf("dict keys must be strings")
}
m[k] = pairs[i+1]
}
return m, nil
},
}
var err error
s.tmpl, err = template.New("").Funcs(funcs).ParseFS(templateFiles, "templates/index.html")
if err != nil {
return fmt.Errorf("parsing templates: %w", err)
}
mux := http.NewServeMux()
mux.Handle("GET /static/", http.FileServerFS(staticFiles))
mux.HandleFunc("GET /{$}", s.handleIndex)
mux.HandleFunc("GET /projects/{project}/secrets", s.handleSecretList)
mux.HandleFunc("POST /projects/{project}/secrets", s.handleSetSecret)
mux.HandleFunc("DELETE /projects/{project}/secrets/{key}", s.handleDeleteSecret)
mux.HandleFunc("GET /projects/{project}/secrets/{key}/reveal", s.handleRevealSecret)
mux.HandleFunc("GET /projects/{project}/secrets/{key}/row", s.handleSecretRow)
mux.HandleFunc("GET /projects/{project}/secrets/{key}/edit", s.handleEditSecret)
mux.HandleFunc("PUT /projects/{project}/secrets/{key}", s.handleUpdateSecret)
mux.HandleFunc("POST /projects", s.handleCreateProject)
mux.HandleFunc("DELETE /projects/{project}", s.handleDeleteProject)
addr := fmt.Sprintf("%s:%d", s.Bind, s.Port)
ln, err := net.Listen("tcp", addr)
if err != nil {
return fmt.Errorf("listening on %s: %w", addr, err)
}
s.srv = &http.Server{Handler: s.csrfMiddleware(mux)}
return s.srv.Serve(ln)
}
func (s *Server) Shutdown(ctx context.Context) {
if s.srv != nil {
s.srv.Shutdown(ctx)
}
}
// csrfMiddleware rejects mutating requests from unexpected origins.
func (s *Server) csrfMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodPost || r.Method == http.MethodPut || r.Method == http.MethodDelete {
origin := r.Header.Get("Origin")
allowed := fmt.Sprintf("http://localhost:%d", s.Port)
if origin != "" && origin != allowed {
http.Error(w, "forbidden", http.StatusForbidden)
return
}
}
next.ServeHTTP(w, r)
})
}
func (s *Server) render(w http.ResponseWriter, name string, data any) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if err := s.tmpl.ExecuteTemplate(w, name, data); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func (s *Server) save() error {
return s.Vault.Save(s.VaultPath, s.Password)
}
func (s *Server) refreshSession(project string) {
vars := s.Vault.GetAll(project)
_ = vault.RefreshSession(project, vars)
}
func (s *Server) buildSecretArea(project string) SecretAreaData {
keys := s.Vault.ListKeys(project)
rows := make([]SecretRow, len(keys))
for i, k := range keys {
rows[i] = SecretRow{Key: k}
}
return SecretAreaData{Project: project, Secrets: rows}
}
// --- Handlers ---
func (s *Server) handleIndex(w http.ResponseWriter, r *http.Request) {
s.render(w, "page", pageData{Projects: s.Vault.ListProjects()})
}
func (s *Server) handleSecretList(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
s.render(w, "secret-area", s.buildSecretArea(project))
}
func (s *Server) handleSetSecret(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := strings.ToUpper(strings.TrimSpace(r.FormValue("key")))
value := r.FormValue("value")
if err := vault.ValidateName(key); err != nil {
http.Error(w, "invalid key: "+err.Error(), http.StatusBadRequest)
return
}
s.Vault.Set(project, key, value)
if err := s.save(); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
s.refreshSession(project)
vault.Audit("set-secret", "project="+vault.HashName(project)+" key="+vault.HashName(key))
s.render(w, "secret-rows", s.buildSecretArea(project))
}
func (s *Server) handleDeleteSecret(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := r.PathValue("key")
if err := vault.ValidateName(project); err != nil {
http.Error(w, "invalid project name", http.StatusBadRequest)
return
}
if err := vault.ValidateName(key); err != nil {
http.Error(w, "invalid key name", http.StatusBadRequest)
return
}
if err := s.Vault.Delete(project, key); err != nil {
http.Error(w, err.Error(), http.StatusNotFound)
return
}
if err := s.save(); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
s.refreshSession(project)
vault.Audit("delete-secret", "project="+vault.HashName(project)+" key="+vault.HashName(key))
w.WriteHeader(http.StatusOK)
}
func (s *Server) handleRevealSecret(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := r.PathValue("key")
value, ok := s.Vault.Get(project, key)
if !ok {
http.Error(w, "not found", http.StatusNotFound)
return
}
s.render(w, "reveal-value", RevealData{Key: key, Value: value})
}
func (s *Server) handleSecretRow(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := r.PathValue("key")
s.render(w, "secret-row", struct {
Project string
Key string
}{project, key})
}
func (s *Server) handleEditSecret(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := r.PathValue("key")
value, ok := s.Vault.Get(project, key)
if !ok {
http.Error(w, "not found", http.StatusNotFound)
return
}
s.render(w, "edit-row", RevealData{Key: key, Value: value, Project: project})
}
func (s *Server) handleUpdateSecret(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
key := r.PathValue("key")
value := r.FormValue("value")
if err := vault.ValidateName(project); err != nil {
http.Error(w, "invalid project name", http.StatusBadRequest)
return
}
if err := vault.ValidateName(key); err != nil {
http.Error(w, "invalid key name", http.StatusBadRequest)
return
}
s.Vault.Set(project, key, value)
if err := s.save(); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
s.refreshSession(project)
vault.Audit("update-secret", "project="+vault.HashName(project)+" key="+vault.HashName(key))
s.render(w, "secret-row", struct {
Project string
Key string
}{project, key})
}
func (s *Server) handleCreateProject(w http.ResponseWriter, r *http.Request) {
name := strings.TrimSpace(r.FormValue("name"))
if err := vault.ValidateName(name); err != nil {
http.Error(w, "invalid project name: "+err.Error(), http.StatusBadRequest)
return
}
if err := s.Vault.CreateProject(name); err != nil {
http.Error(w, err.Error(), http.StatusConflict)
return
}
if err := s.save(); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
vault.Audit("create-project", "project="+vault.HashName(name))
s.render(w, "project-list", s.Vault.ListProjects())
}
func (s *Server) handleDeleteProject(w http.ResponseWriter, r *http.Request) {
project := r.PathValue("project")
if err := vault.ValidateName(project); err != nil {
http.Error(w, "invalid project name", http.StatusBadRequest)
return
}
if err := s.Vault.DeleteProject(project); err != nil {
http.Error(w, err.Error(), http.StatusNotFound)
return
}
if err := s.save(); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
vault.Audit("delete-project", "project="+vault.HashName(project))
// Return updated project list; HTMX OOB clears the secret area
w.Header().Set("Content-Type", "text/html; charset=utf-8")
s.tmpl.ExecuteTemplate(w, "project-list", s.Vault.ListProjects())
fmt.Fprintf(w, `<div id="secret-area" hx-swap-oob="true"><div class="p-8"><p class="text-sm text-gray-600">← Select a project to view secrets</p></div></div>`)
}
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