63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
package main
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import (
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"net/http"
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"os"
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"path/filepath"
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)
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// Root todo.txt rail widget (assets/todo-rail.js). /_todo reads and writes the
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// single wiki-root todo.txt — the path is fixed, so there is no traversal
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// surface. GET returns the raw text (404 when the file is absent, which the
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// widget treats as "render nothing"); POST replaces the whole file atomically.
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// Unlike the index.md save path, empty content does NOT delete the file: the
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// widget has no in-UI way to recreate it, so an empty save keeps an empty file.
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func (h *handler) todoPath() string {
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return filepath.Join(h.root, "todo.txt")
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}
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func (h *handler) handleTodo(w http.ResponseWriter, r *http.Request) {
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if !h.checkAuth(w, r) {
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return
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}
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switch r.Method {
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case http.MethodGet:
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h.handleTodoGet(w, r)
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case http.MethodPost:
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h.handleTodoPost(w, r)
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default:
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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}
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}
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func (h *handler) handleTodoGet(w http.ResponseWriter, r *http.Request) {
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data, err := os.ReadFile(h.todoPath())
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if err != nil {
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if os.IsNotExist(err) {
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http.NotFound(w, r)
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return
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}
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http.Error(w, "read failed: "+err.Error(), http.StatusInternalServerError)
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return
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}
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// The rail re-fetches on every page load; a heuristically cached copy
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// would show stale todos after an edit.
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w.Header().Set("Cache-Control", "no-store")
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w.Header().Set("Content-Type", "text/plain; charset=utf-8")
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w.Write(data)
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}
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func (h *handler) handleTodoPost(w http.ResponseWriter, r *http.Request) {
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if err := r.ParseForm(); err != nil {
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http.Error(w, "bad request", http.StatusBadRequest)
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return
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}
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content := r.FormValue("content")
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if err := writeFileAtomic(h.todoPath(), []byte(content), 0644); err != nil {
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http.Error(w, "write failed: "+err.Error(), http.StatusInternalServerError)
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return
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}
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w.WriteHeader(http.StatusNoContent)
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}
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