package beego //@todo add template funcs import ( "errors" "fmt" "html/template" "io/ioutil" "os" "path/filepath" "regexp" "strings" "github.com/astaxie/beego/utils" ) var ( beegoTplFuncMap template.FuncMap // beego template caching map and supported template file extensions. BeeTemplates map[string]*template.Template BeeTemplateExt []string ) func init() { BeeTemplates = make(map[string]*template.Template) beegoTplFuncMap = make(template.FuncMap) BeeTemplateExt = make([]string, 0) BeeTemplateExt = append(BeeTemplateExt, "tpl", "html") beegoTplFuncMap["dateformat"] = DateFormat beegoTplFuncMap["date"] = Date beegoTplFuncMap["compare"] = Compare beegoTplFuncMap["substr"] = Substr beegoTplFuncMap["html2str"] = Html2str beegoTplFuncMap["str2html"] = Str2html beegoTplFuncMap["htmlquote"] = Htmlquote beegoTplFuncMap["htmlunquote"] = Htmlunquote beegoTplFuncMap["renderform"] = RenderForm beegoTplFuncMap["assets_js"] = AssetsJs beegoTplFuncMap["assets_css"] = AssetsCss // go1.2 added template funcs // Comparisons beegoTplFuncMap["eq"] = eq // == beegoTplFuncMap["ge"] = ge // >= beegoTplFuncMap["gt"] = gt // > beegoTplFuncMap["le"] = le // <= beegoTplFuncMap["lt"] = lt // < beegoTplFuncMap["ne"] = ne // != beegoTplFuncMap["urlfor"] = UrlFor // != } // AddFuncMap let user to register a func in the template. func AddFuncMap(key string, funname interface{}) error { beegoTplFuncMap[key] = funname return nil } type templatefile struct { root string files map[string][]string } func (self *templatefile) visit(paths string, f os.FileInfo, err error) error { if f == nil { return err } if f.IsDir() || (f.Mode()&os.ModeSymlink) > 0 { return nil } if !HasTemplateExt(paths) { return nil } replace := strings.NewReplacer("\\", "/") a := []byte(paths) a = a[len([]byte(self.root)):] file := strings.TrimLeft(replace.Replace(string(a)), "/") subdir := filepath.Dir(file) if _, ok := self.files[subdir]; ok { self.files[subdir] = append(self.files[subdir], file) } else { m := make([]string, 1) m[0] = file self.files[subdir] = m } return nil } // return this path contains supported template extension of beego or not. func HasTemplateExt(paths string) bool { for _, v := range BeeTemplateExt { if strings.HasSuffix(paths, "."+v) { return true } } return false } // add new extension for template. func AddTemplateExt(ext string) { for _, v := range BeeTemplateExt { if v == ext { return } } BeeTemplateExt = append(BeeTemplateExt, ext) } // build all template files in a directory. // it makes beego can render any template file in view directory. func BuildTemplate(dir string) error { if _, err := os.Stat(dir); err != nil { if os.IsNotExist(err) { return nil } else { return errors.New("dir open err") } } self := &templatefile{ root: dir, files: make(map[string][]string), } err := filepath.Walk(dir, func(path string, f os.FileInfo, err error) error { return self.visit(path, f, err) }) if err != nil { fmt.Printf("filepath.Walk() returned %v\n", err) return err } for _, v := range self.files { for _, file := range v { t, err := getTemplate(self.root, file, v...) if err != nil { Trace("parse template err:", file, err) } else { BeeTemplates[file] = t } } } return nil } func getTplDeep(root, file, parent string, t *template.Template) (*template.Template, [][]string, error) { var fileabspath string if filepath.HasPrefix(file, "../") { fileabspath = filepath.Join(root, filepath.Dir(parent), file) } else { fileabspath = filepath.Join(root, file) } if e := utils.FileExists(fileabspath); !e { panic("can't find template file:" + file) } data, err := ioutil.ReadFile(fileabspath) if err != nil { return nil, [][]string{}, err } t, err = t.New(file).Parse(string(data)) if err != nil { return nil, [][]string{}, err } reg := regexp.MustCompile(TemplateLeft + "[ ]*template[ ]+\"([^\"]+)\"") allsub := reg.FindAllStringSubmatch(string(data), -1) for _, m := range allsub { if len(m) == 2 { tlook := t.Lookup(m[1]) if tlook != nil { continue } if !HasTemplateExt(m[1]) { continue } t, _, err = getTplDeep(root, m[1], file, t) if err != nil { return nil, [][]string{}, err } } } return t, allsub, nil } func getTemplate(root, file string, others ...string) (t *template.Template, err error) { t = template.New(file).Delims(TemplateLeft, TemplateRight).Funcs(beegoTplFuncMap) var submods [][]string t, submods, err = getTplDeep(root, file, "", t) if err != nil { return nil, err } t, err = _getTemplate(t, root, submods, others...) if err != nil { return nil, err } return } func _getTemplate(t0 *template.Template, root string, submods [][]string, others ...string) (t *template.Template, err error) { t = t0 for _, m := range submods { if len(m) == 2 { templ := t.Lookup(m[1]) if templ != nil { continue } //first check filename for _, otherfile := range others { if otherfile == m[1] { var submods1 [][]string t, submods1, err = getTplDeep(root, otherfile, "", t) if err != nil { Trace("template parse file err:", err) } else if submods1 != nil && len(submods1) > 0 { t, err = _getTemplate(t, root, submods1, others...) } break } } //second check define for _, otherfile := range others { fileabspath := filepath.Join(root, otherfile) data, err := ioutil.ReadFile(fileabspath) if err != nil { continue } reg := regexp.MustCompile(TemplateLeft + "[ ]*define[ ]+\"([^\"]+)\"") allsub := reg.FindAllStringSubmatch(string(data), -1) for _, sub := range allsub { if len(sub) == 2 && sub[1] == m[1] { var submods1 [][]string t, submods1, err = getTplDeep(root, otherfile, "", t) if err != nil { Trace("template parse file err:", err) } else if submods1 != nil && len(submods1) > 0 { t, err = _getTemplate(t, root, submods1, others...) } break } } } } } return }