func (a *Handler) PostSaved(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
c, err := rellenv.FromContext(ctx)
if err != nil {
return err
}
if !rellenv.IsEmployee(ctx) {
return ctxerr.Wrap(ctx, errSaveDisabled)
}
if !a.Xsrf.Validate(r.FormValue(paramName), w, r, savedPath) {
return ctxerr.Wrap(ctx, errTokenMismatch)
}
content := strings.TrimSpace(r.FormValue("code"))
content = strings.Replace(content, "\x13", "", -1) // remove CR
id := examples.ContentID(content)
db := a.ExampleStore.DB
example, ok := db.Reverse[id]
if ok {
http.Redirect(w, r, c.ViewURL(example.URL), 302)
return nil
}
err = a.ExampleStore.Save(id, content)
if err != nil {
return err
}
http.Redirect(w, r, c.ViewURL(savedPath+id), 302)
return nil
}
func (a *Handler) Response(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
c, err := rellenv.FromContext(ctx)
if err != nil {
return err
}
if r.FormValue("state") != a.state(w, r) {
return ctxerr.Wrap(ctx, errInvalidState)
}
values := url.Values{}
values.Set("client_id", strconv.FormatUint(a.App.ID(), 10))
values.Set("client_secret", a.App.Secret())
values.Set("redirect_uri", redirectURI(c))
values.Set("code", r.FormValue("code"))
atURL := &fburl.URL{
Scheme: "https",
SubDomain: fburl.DGraph,
Env: rellenv.FbEnv(ctx),
Path: "/oauth/access_token",
Values: values,
}
req, err := http.NewRequest("GET", atURL.String(), nil)
if err != nil {
return ctxerr.Wrap(ctx, errOAuthFail)
}
res, err := a.HttpTransport.RoundTrip(req)
if err != nil {
return ctxerr.Wrap(ctx, err)
}
defer res.Body.Close()
bd, err := ioutil.ReadAll(res.Body)
if err != nil {
return ctxerr.Wrap(ctx, err)
}
h.WriteResponse(w, r, &h.Frag{
&h.Script{Inner: h.Unsafe("window.location.hash = ''")},
h.String(string(bd)),
})
return nil
}
// Parse the Env and an Example.
func (h *Handler) parse(ctx context.Context, r *http.Request) (*rellenv.Env, *examples.Example, error) {
context, err := rellenv.FromContext(ctx)
if err != nil {
return nil, nil, err
}
example, err := h.ExampleStore.Load(r.URL.Path)
if err != nil {
return nil, nil, ctxerr.Wrap(ctx, err)
}
return context, example, nil
}
func (a *Handler) Handler(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
if !rellenv.IsEmployee(ctx) {
return ctxerr.Wrap(ctx, errEmployeesOnly)
}
switch r.URL.Path {
case Path:
return a.Start(ctx, w, r)
case Path + resp:
return a.Response(ctx, w, r)
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusNotFound)
h.WriteResponse(w, r, &h.Script{
Inner: h.Unsafe("top.location='/'"),
})
return nil
}
// FromContext retrieves the Env from the Context. If one isn't found, an error
// is returned.
func FromContext(ctx context.Context) (*Env, error) {
if e, ok := ctx.Value(contextEnvKey).(*Env); ok {
return e, nil
}
return nil, ctxerr.Wrap(ctx, errEnvNotFound)
}