func()

in rellenv/context.go [115:187]

• 71 lines of code
• 20 McCabe index (conditional complexity)

func (p *Parser) FromRequest(r *http.Request) (*Env, error) {
	e := p.Default()

	if appid, err := strconv.ParseUint(r.FormValue("appid"), 10, 64); err == nil {
		e.appID = appid
	}
	if appid, err := strconv.ParseUint(r.FormValue("client_id"), 10, 64); err == nil {
		e.appID = appid
	}
	if level := r.FormValue("level"); level != "" {
		e.level = level
	}
	if locale := r.FormValue("locale"); locale != "" {
		e.locale = locale
	}
	if env := r.FormValue("server"); env != "" {
		e.Env = env
	}
	if version := r.FormValue("version"); version != "" {
		e.Version = version
	}
	if viewMode := r.FormValue("view-mode"); viewMode != "" {
		e.ViewMode = viewMode
	}
	if module := r.FormValue("module"); module != "" {
		e.Module = module
	}
	if status, err := strconv.ParseBool(r.FormValue("status")); err == nil {
		e.Status = status
	}
	if fr, err := strconv.ParseBool(r.FormValue("frictionlessRequests")); err == nil {
		e.FrictionlessRequests = fr
	}
	if init, err := strconv.ParseBool(r.FormValue("init")); err == nil {
		e.Init = init
	}

	var err error
	rawSr := r.FormValue("signed_request")
	if rawSr != "" {
		e.SignedRequest, err = fbsr.Unmarshal(
			[]byte(rawSr),
			p.App.SecretByte(),
			p.SignedRequestMaxAge,
		)
		if err == nil {
			if e.SignedRequest.Page != nil {
				e.ViewMode = PageTab
			} else {
				e.ViewMode = Canvas
			}
		}
	} else {
		cookie, _ := r.Cookie(fmt.Sprintf("fbsr_%d", e.appID))
		if cookie != nil {
			e.SignedRequest, err = fbsr.Unmarshal(
				[]byte(cookie.Value),
				p.App.SecretByte(),
				p.SignedRequestMaxAge,
			)
		}
	}
	e.Host = p.Forwarded.Host(r)
	e.Scheme = p.Forwarded.Scheme(r)
	if e.SignedRequest != nil && e.SignedRequest.UserID != 0 {
		e.isEmployee = p.EmpChecker.Check(e.SignedRequest.UserID)
	}
	e.appNamespace = p.AppNSFetcher.Get(e.appID)
	if e.Env != "" && !envRegexp.MatchString(e.Env) {
		e.Env = ""
	}
	return e, nil
}