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93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
/*
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Copyright 2017 The KUAR Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package htmlutils
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import (
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"bytes"
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"fmt"
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"html/template"
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"log"
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"net/http"
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"strconv"
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"sync"
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"github.com/kubernetes-up-and-running/kuard/pkg/sitedata"
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)
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type TemplateGroup struct {
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mu sync.Mutex
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t *template.Template
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debug bool
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}
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func (g *TemplateGroup) SetConfig(debug bool) {
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g.mu.Lock()
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defer g.mu.Unlock()
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g.debug = debug
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g.t = nil
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}
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func (g *TemplateGroup) Render(w http.ResponseWriter, name string, context interface{}) {
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t := g.GetTemplate(name)
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buf := &bytes.Buffer{}
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err := t.Execute(buf, context)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "text/html")
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w.Header().Set("Content-Length", strconv.Itoa(buf.Len()))
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w.WriteHeader(http.StatusOK)
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buf.WriteTo(w)
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}
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func (g *TemplateGroup) GetTemplate(name string) *template.Template {
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g.mu.Lock()
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defer g.mu.Unlock()
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if g.t == nil || g.debug {
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g.t = g.LoadTemplates()
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}
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t := g.t.Lookup(name)
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if t == nil {
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panic(fmt.Sprintf("Could not load template %v", name))
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}
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return t
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}
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// LoadTemplates loads the templates for our toy server
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func (g *TemplateGroup) LoadTemplates() *template.Template {
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tData, err := sitedata.LoadFilesInDir("templates")
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if err != nil {
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log.Printf("Error loading template files: %v", err)
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}
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t := template.New("").Funcs(FuncMap())
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for f, fData := range tData {
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log.Printf("Loading template for %v", f)
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_, err := t.New(f).Parse(string(fData))
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if err != nil {
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log.Printf("ERROR: Could parse template %v: %v", f, err)
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}
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}
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return t
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}
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