Golang template.New函数代码示例

func main() {
	// apiAuth guards access to api group
	apiAuth := mw.HTTPAuth("API", func(user, pass string) bool {
		return pass == "Secret"
	})
	// dashboardAuth guards access to dashboard group
	dashboardAuth := mw.HTTPAuth("Dashboard", func(user, pass string) bool {
		return pass == "Password"
	})

	// set up root router with Logger, Recovery and LocalStorage middleware
	w := wok.Default()

	// Index page
	idxTpl := template.Must(template.New("index").Parse("<h1>Hello</h1>"))
	w.GET("/", render.Template(idxTpl))(index)

	// api is a group of routes with common authentication and result rendering
	api := w.Group("/api", apiAuth, render.JSON)
	{
		api.GET("/")(apiIndex)
		api.GET("/:id")(apiDetail)
	}

	// dash is an example of another separate route group
	dash := w.Group("/dash", dashboardAuth)
	{
		tpl, _ := template.New("dash").Parse("<h1>Hello {{ .User }}</h1>")
		dash.GET("/", render.Template(tpl))(dashIndex)
	}

	http.ListenAndServe(":8080", w)
}

func main() {

	data := map[string]interface{}{
		"Title": "Hello World!",
	}

	t := template.New("HELLO")

	err := t.ExecuteTemplate(os.Stdout, "Template-Html.tmpl", data)
	// not working, empty output.
	// So the template file MUST be specified twice!
	var templates = template.Must(t.ParseFiles("Template-Html.tmpl"))
	err = templates.ExecuteTemplate(os.Stdout, "Template-Html.tmpl", data)
	// working
	fmt.Println("\n\n")

	// This option, need to use the template file twice, once for
	// `ParseFiles`, then for `ExecuteTemplate`. That looks awkward and
	// unnecessary. The following one looks straightforward to me.

	t = template.New("Test template")
	t, err = t.Parse("<title>{{ .Title }}</title>")
	// working
	t, err = template.ParseFiles("Template-Html.tmpl")
	// working now! Note the difference!!
	checkError(err)

	err = t.Execute(os.Stdout, data)

	fmt.Println("\n\nTemplate name is : ", t.Name())

}

//transactionStatus handles the transactionStatusRequest as defined in the WSDL
//response is the XML version of the client callback
func (c2b *C2B) transactionStatus(data interface{}) http.HandlerFunc {
	return func(rw http.ResponseWriter, r *http.Request) {
		parsed := data.(*TransactionStatusRequest)

		validate(rw,
			validAuthDetails("", parsed.Header.CheckoutHeader),
			validPassedConfirmTrxID(parsed.Body.TransactionStatus.TransID, parsed.Body.TransactionStatus.MerchantTransID),
		)

		trx := c2b.idExists(parsed.Body.TransactionStatus.MerchantTransID, parsed.Body.TransactionStatus.TransID)

		if trx == nil {
			resp := new(ProcessCheckoutResponse)
			resp.ReturnCode = transactionMismatch
			resp.Description = "transaction details are different from original captured request details."
			resp.TransactionID = ""
			resp.ConfirmTrx = true
			tpl, _ := template.New("response").Parse(processCheckOutRespTPL)
			tpl.Execute(rw, resp)
			return
		}
		tpl, _ := template.New("response").Parse(callBackRespTPL)
		tpl.Execute(rw, trx)
	}
}

// Sends email based on the result of all batches
func (r *GlobalResults) sendMail() {

	funcMap := template.FuncMap{
		"odd": func(i int) bool { return i%2 == 0 },
	}

	tHeader := template.Must(template.New("header").Parse(emailTemplateHtmlHeader))
	tBody := template.Must(template.New("body").Funcs(funcMap).Parse(emailTemplateHtmlBody))

	var docHeader bytes.Buffer
	tHeader.Execute(&docHeader, r.Author)

	for _, br := range r.BatchResultList {
		var docBody bytes.Buffer

		tBody.Execute(&docBody, br)

		TraceActivity.Printf("----------------------------------------------------------------------------- \n")
		TraceActivity.Printf("GeneratedCOntent : \n")
		TraceActivity.Printf("%s\n", docBody.String())
		TraceActivity.Printf("----------------------------------------------------------------------------- \n")

		var buffer bytes.Buffer
		buffer.WriteString(docHeader.String())
		buffer.WriteString(docBody.String())
		br.Smtp.sendEmailHtml(br, buffer.String())
	}
}

func main () {
	html_t, err := gaml.GamlToHtml(gaml_template_1)
	if err != nil {
		fmt.Printf("error: %s", err.Error())
	}
	template,err := template.New("test_template").Parse(html_t)
	template.Execute(os.Stdout, "Hello World!")

	html_t, err = gaml.GamlToHtml(gaml_template_2)
	if err != nil {
		fmt.Printf("error: %s", err.Error())
	}
	template,err = template.New("test_template2").Parse(html_t)
	if err != nil {
		fmt.Printf("error: %s", err.Error())
	}
	template.Execute(os.Stdout, People)


	html_t, err = gaml.GamlToHtml(gaml_template_3)
	if err != nil {
		fmt.Printf("error: %s", err.Error())
	}
	template,err = template.New("test_template3").Parse(html_t)
	if err != nil {
		fmt.Printf("error: %s", err.Error())
	}
	template.Execute(os.Stdout, People)

}

func mainMenu(w http.ResponseWriter, r *http.Request) {
	t, err := template.New("foo").Parse(`<html><body><h1>Bootleg</h1>{{.}}</body></html>`)
	if err != nil {
		panic(err)
	}

	buf := bytes.Buffer{}

	type ServerArg struct {
		Name string
		Body template.HTML
	}

	for _, srv := range srvs {
		t1, err1 := template.New("bar").Parse(`<h2>{{.Name}}</h2><ul>{{.Body}}</ul>`)
		if err1 != nil {
			panic(err1)
		}

		buf1 := bytes.Buffer{}
		formatDir(srv.files, &buf1)
		t1.Execute(&buf, ServerArg{srv.name, template.HTML(buf1.String())})
	}

	t.Execute(w, template.HTML(buf.String()))
}

func LoadTemplates() {
	EmailTmpl = text_template.Must(text_template.New("Email").ParseGlob(
		filepath.Join(cfg.TemplatesDir, "email", "*.txt"),
	))

	SignupTmpl = template.Must(template.New("Signup").ParseFiles(
		filepath.Join(cfg.TemplatesDir, "account", "base.html"),
		filepath.Join(cfg.TemplatesDir, "account", "signup.html"),
	))

	SignupOkTmpl = template.Must(template.New("SignupOk").ParseFiles(
		filepath.Join(cfg.TemplatesDir, "account", "base.html"),
		filepath.Join(cfg.TemplatesDir, "account", "signup_ok.html"),
	))

	HelloTmpl = template.Must(template.New("Hello").ParseFiles(
		filepath.Join(cfg.TemplatesDir, "account", "base.html"),
		filepath.Join(cfg.TemplatesDir, "account", "hello.html"),
	))

	LoginTmpl = template.Must(template.New("Login").ParseFiles(
		filepath.Join(cfg.TemplatesDir, "account", "base.html"),
		filepath.Join(cfg.TemplatesDir, "account", "login.html"),
	))
}

func TestTemplate_FuncMap_url(t *testing.T) {
	app := kocha.NewTestApp()
	funcMap := template.FuncMap(app.Template.FuncMap)

	func() {
		tmpl := template.Must(template.New("test").Funcs(funcMap).Parse(`{{url "root"}}`))
		var buf bytes.Buffer
		if err := tmpl.Execute(&buf, nil); err != nil {
			panic(err)
		}
		actual := buf.String()
		expected := "/"
		if !reflect.DeepEqual(actual, expected) {
			t.Errorf("Expect %q, but %q", expected, actual)
		}
	}()

	func() {
		tmpl := template.Must(template.New("test").Funcs(funcMap).Parse(`{{url "user" 713}}`))
		var buf bytes.Buffer
		if err := tmpl.Execute(&buf, nil); err != nil {
			panic(err)
		}
		actual := buf.String()
		expected := "/user/713"
		if !reflect.DeepEqual(actual, expected) {
			t.Errorf("Expect %v, but %v", expected, actual)
		}
	}()
}

// templateFinder returns a directory string where template "index.html" is located.
// We also parse the template to test whether or not we should boot any further.
func templateFinder() string {
	templateDir := "./templates/"
	// Try to parse
	_, err = template.New("Index").Funcs(funcMap).ParseFiles(templateDir + "index.html")
	if err == nil {
		return templateDir
	}

	// Does not exist
	if strings.Contains(err.Error(), "no such file") {
		log.Println("Creating ./templates")
		err = RestoreAssets(".", "templates")
		if err != nil {
			log.Fatalln(err)
		}

		// Try to parse
		_, err = template.New("Index").Funcs(funcMap).ParseFiles(templateDir + "index.html")
		if err == nil {
			return templateDir
		}

	} else if strings.Contains(err.Error(), "not defined") {
		log.Println("Template is bad.", err.Error())
		os.Exit(1)
	}

	// The error is probably permissions and theres nothing more to be done
	log.Fatalln("Template:", err)
	return ""
}

func (mh ManifestHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	q := req.URL.Query()
	name, ok := q["p"]
	if !ok || len(name) != 1 {
		w.Header().Set("Content-Type", "text/html")
		t, err := template.New("show").Parse(ManifestIndexTemplate)
		options.FailIf(err, "can't parse template")
		err = t.Execute(w, mh)
		options.FailIf(err, "can't execute template")
		return
	}
	fmt.Printf("request for: %s\n", name[0])
	var p auth.Prin
	if _, err := fmt.Sscanf("("+name[0]+")", "%v", &p); err != nil {
		http.NotFound(w, req)
		return
	}

	m := tao.DeriveManifest(&p)
	var b bytes.Buffer
	Dump(indent.NewHtmlWriter(&b, "h2"), tao.Manifest{"Principal Manifest": m})
	s := b.String()

	w.Header().Set("Content-Type", "text/html")
	t, err := template.New("show").Parse(ManifestTemplate)
	options.FailIf(err, "can't parse template")
	err = t.Execute(w, template.HTML(s))
	options.FailIf(err, "can't execute template")
}

func TestTemplateFuncs_date(t *testing.T) {
	base := `{{date . "%v"}}`
	now := time.Now()
	tmpl := template.Must(template.New("test").Funcs(TemplateFuncs).Parse(fmt.Sprintf(base, "2006/01/02 15:04:05.999999999")))
	var buf bytes.Buffer
	if err := tmpl.Execute(&buf, now); err != nil {
		panic(err)
	}
	actual := buf.String()
	expected := now.Format("2006/01/02 15:04:05.999999999")
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expect %q, but %q", expected, actual)
	}

	tmpl = template.Must(template.New("test").Funcs(TemplateFuncs).Parse(fmt.Sprintf(base, "Jan 02 2006 03:04.999999999")))
	buf.Reset()
	if err := tmpl.Execute(&buf, now); err != nil {
		panic(err)
	}
	actual = buf.String()
	expected = now.Format("Jan 02 2006 03:04.999999999")
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expect %q, but %q", expected, actual)
	}
}

func init() {
	ALL_METHODS = []string{GET, HEAD, POST, CONNECT, DELETE, OPTIONS, PUT, TRACE}

	defaultMimeTypes = make(map[string]string)
	defaultMimeTypes[".htm"] = MIME_TYPE_HTML
	defaultMimeTypes[".html"] = MIME_TYPE_HTML
	defaultMimeTypes[".xhtml"] = MIME_TYPE_XHTML_XML
	defaultMimeTypes[".xml"] = MIME_TYPE_XML
	defaultMimeTypes[".css"] = MIME_TYPE_CSS
	defaultMimeTypes[".js"] = MIME_TYPE_JAVASCRIPT
	defaultMimeTypes[".json"] = MIME_TYPE_JSON
	defaultMimeTypes[".jpg"] = MIME_TYPE_JPEG
	defaultMimeTypes[".jpeg"] = MIME_TYPE_JPEG
	defaultMimeTypes[".gif"] = MIME_TYPE_GIF
	defaultMimeTypes[".png"] = MIME_TYPE_PNG
	defaultMimeTypes[".ico"] = MIME_TYPE_ICO
	defaultMimeTypes[".swf"] = MIME_TYPE_SWF
	defaultMimeTypes[".zip"] = MIME_TYPE_ZIP
	defaultMimeTypes[".bz2"] = MIME_TYPE_BZIP2
	defaultMimeTypes[".gz"] = MIME_TYPE_GZ
	defaultMimeTypes[".tar"] = MIME_TYPE_TAR
	defaultMimeTypes[".tgz"] = MIME_TYPE_GZ
	defaultMimeTypes[".htc"] = MIME_TYPE_COMPONENT
	defaultMimeTypes[".manifest"] = MIME_TYPE_CACHE_MANIFEST
	defaultMimeTypes[".svg"] = MIME_TYPE_SVG
	defaultMimeTypes[".txt"] = MIME_TYPE_TEXT_PLAIN
	defaultMimeTypes[".text"] = MIME_TYPE_TEXT_PLAIN
	defaultMimeTypes[".csv"] = MIME_TYPE_CSV

	var err error
	HTML_DIRECTORY_LISTING_SUCCESS_TEMPLATE, err = template.New("directory_listing_success").Parse(HTML_DIRECTORY_LISTING_SUCCESS_TEMPLATE_STRING)
	template.Must(HTML_DIRECTORY_LISTING_SUCCESS_TEMPLATE, err)
	HTML_DIRECTORY_LISTING_ERROR_TEMPLATE, err = template.New("directory_listing_error").Parse(HTML_DIRECTORY_LISTING_ERROR_TEMPLATE_STRING)
	template.Must(HTML_DIRECTORY_LISTING_ERROR_TEMPLATE, err)
}

func TestTemplateFuncs_url(t *testing.T) {
	oldAppConfig := appConfig
	appConfig = newTestAppConfig()
	defer func() {
		appConfig = oldAppConfig
	}()
	tmpl := template.Must(template.New("test").Funcs(TemplateFuncs).Parse(`{{url "root"}}`))
	var buf bytes.Buffer
	if err := tmpl.Execute(&buf, nil); err != nil {
		panic(err)
	}
	actual := buf.String()
	expected := "/"
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expect %q, but %q", expected, actual)
	}

	tmpl = template.Must(template.New("test").Funcs(TemplateFuncs).Parse(`{{url "user" 713}}`))
	buf.Reset()
	if err := tmpl.Execute(&buf, nil); err != nil {
		panic(err)
	}
	actual = buf.String()
	expected = "/user/713"
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expect %v, but %v", expected, actual)
	}
}

//列出某问题的详细信息，URL，/probliem?detail/pid?<pid>
func (this *ProblemController) Detail(w http.ResponseWriter, r *http.Request) {
	class.Logger.Debug("Problem Detail")
	this.Init(w, r)

	args := this.ParseURL(r.URL.String())
	pid, err := strconv.Atoi(args["pid"])
	if err != nil {
		http.Error(w, "args error", 400)
		return
	}

	problemModel := model.ProblemModel{}
	one, err := problemModel.Detail(pid)
	if err != nil {
		t := template.New("layout.tpl")
		t, err = t.ParseFiles("view/layout.tpl", "view/400.tpl")
		if err != nil {
			class.Logger.Debug(err)
			http.Error(w, "tpl error", 500)
			return
		}

		this.Data["Info"] = "No such problem"
		this.Data["Title"] = "No such problem"
		err = t.Execute(w, this.Data)
		if err != nil {
			http.Error(w, "tpl error", 500)
			return
		}
		return
	}
	this.Data["Detail"] = one

	if this.Privilege <= config.PrivilegePU && one.Status == config.StatusReverse { // 如果问题状态为普通用户不可见
		t := template.New("layout.tpl")
		t, err = t.ParseFiles("view/layout.tpl", "view/400.tpl")
		if err != nil {
			class.Logger.Debug(err)
			http.Error(w, "tpl error", 500)
			return
		}

		this.Data["Info"] = "No such problem"
		this.Data["Title"] = "No such problem"
		err = t.Execute(w, this.Data)
		if err != nil {
			http.Error(w, "tpl error", 500)
			return
		}
		return
	}

	this.Data["Privilege"] = this.Privilege
	this.Data["Title"] = "Problem — " + strconv.Itoa(pid)
	err = this.Execute(w, "view/layout.tpl", "view/problem_detail.tpl")
	if err != nil {
		http.Error(w, "tpl error", 500)
		return
	}
}

func RunTemplate(reportFilename, templateFile, templateText string, out *os.File, data interface{}, format string) (err error) {
	var tmpl *template.Template
	var htmpl *htemplate.Template
	if templateFile != "" {
		if format == "html" {
			htmpl, err = htemplate.New(templateFile).ParseGlob(templateFile)
		} else {
			tmpl, err = template.New(templateFile).ParseGlob(templateFile)
		}
	} else {
		if format == "html" {
			htmpl, err = htemplate.New(reportFilename).Parse(templateText)
		} else {
			tmpl, err = template.New(reportFilename).Parse(templateText)
		}
	}
	if err != nil {
		return err
	}
	if format == "html" {
		err = htmpl.Execute(out, data)
	} else {
		err = tmpl.Execute(out, data)
	}
	if err != nil {
		return err
	}

	return err
}