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Code Issues Releases Activity

Added image resizer for responsive web apps

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This commit is contained in:
Lee Brown
2019-05-20 22:16:58 -05:00
parent 5879fc664f f4d44b57d4
commit 790c7b3255
23 changed files with 1458 additions and 327 deletions
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78
example-project/internal/platform/web/template-renderer/template_renderer.go
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@ -23,7 +23,7 @@ var (
)
type Template struct {
Funcs template.FuncMap
Funcs template.FuncMap
mainTemplate *template.Template
}
@ -117,14 +117,14 @@ func NewTemplate(templateFuncs template.FuncMap) *Template {
type TemplateRenderer struct {
templateDir string
// has to be map so can know the name and map the name to the location / file path
layoutFiles map[string]string
contentFiles map[string]string
partialFiles map[string]string
layoutFiles map[string]string
contentFiles map[string]string
partialFiles map[string]string
enableHotReload bool
templates map[string]*template.Template
globalViewData map[string]interface{}
mainTemplate *template.Template
errorHandler func(ctx context.Context, w http.ResponseWriter, req *http.Request, renderer web.Renderer, statusCode int, er error) error
templates map[string]*template.Template
globalViewData map[string]interface{}
mainTemplate *template.Template
errorHandler func(ctx context.Context, w http.ResponseWriter, req *http.Request, renderer web.Renderer, statusCode int, er error) error
}
// NewTemplateRenderer implements the interface web.Renderer allowing for execution of
@ -134,14 +134,14 @@ type TemplateRenderer struct {
// 3. partials: templates used by multiple layout or content templates
func NewTemplateRenderer(templateDir string, enableHotReload bool, globalViewData map[string]interface{}, tmpl *Template, errorHandler func(ctx context.Context, w http.ResponseWriter, req *http.Request, renderer web.Renderer, statusCode int, er error) error) (*TemplateRenderer, error) {
r := &TemplateRenderer{
templateDir: templateDir,
layoutFiles: make( map[string]string),
contentFiles: make( map[string]string),
partialFiles: make( map[string]string),
templateDir: templateDir,
layoutFiles: make(map[string]string),
contentFiles: make(map[string]string),
partialFiles: make(map[string]string),
enableHotReload: enableHotReload,
templates: make(map[string]*template.Template),
globalViewData:globalViewData,
errorHandler: errorHandler,
templates: make(map[string]*template.Template),
globalViewData: globalViewData,
errorHandler: errorHandler,
}
// Recursively loop through all folders/files in the template directory and group them by their
@ -172,7 +172,7 @@ func NewTemplateRenderer(templateDir string, enableHotReload bool, globalViewDat
// Main template used to render execute all templates against.
r.mainTemplate = template.New("main")
r.mainTemplate, _ = r.mainTemplate.Parse( `{{define "main" }} {{ template "base" . }} {{ end }}`)
r.mainTemplate, _ = r.mainTemplate.Parse(`{{define "main" }} {{ template "base" . }} {{ end }}`)
r.mainTemplate.Funcs(tmpl.Funcs)
// Ensure all layout files render successfully with no errors.
@ -214,7 +214,8 @@ func (r *TemplateRenderer) Render(ctx context.Context, w http.ResponseWriter, re
// then parse the template files.
t, ok := r.templates[templateContentName]
if !ok || r.enableHotReload {
t, err := r.mainTemplate.Clone()
var err error
t, err = r.mainTemplate.Clone()
if err != nil {
return err
}
@ -267,7 +268,7 @@ func (r *TemplateRenderer) Render(ctx context.Context, w http.ResponseWriter, re
// Add Request URL to render data
reqData := map[string]interface{}{
"Url": "",
"Uri": "",
"Uri": "",
}
if req != nil {
reqData["Url"] = req.URL.String()
@ -299,7 +300,7 @@ func (r *TemplateRenderer) Render(ctx context.Context, w http.ResponseWriter, re
func (r *TemplateRenderer) Error(ctx context.Context, w http.ResponseWriter, req *http.Request, statusCode int, er error) error {
// If error handler was defined to support formatted response for web, used it.
if r.errorHandler != nil {
return r.errorHandler(ctx, w, req, r, statusCode, er)
return r.errorHandler(ctx, w, req, r, statusCode, er)
}
// Default response text response of error.
@ -318,42 +319,3 @@ func (tr *TemplateRenderer) Static(rootDir, prefix string) web.Handler {
}
return h
}
// S3Url formats a path to include either the S3 URL or a CloudFront
// URL instead of serving the file from local file system.
func S3Url(baseS3Url, baseS3Origin, p string) string {
if strings.HasPrefix(p, "http") {
return p
}
org := strings.TrimRight(baseS3Origin, "/")
if org != "" {
p = strings.Replace(p, org+"/", "", 1)
}
pts := strings.Split(p, "?")
p = pts[0]
var rq string
if len(pts) > 1 {
rq = pts[1]
}
p = strings.TrimLeft(p, "/")
baseUrl := baseS3Url
u, err := url.Parse(baseUrl)
if err != nil {
return "?"
}
ldir := filepath.Base(u.Path)
if strings.HasPrefix(p, ldir) {
p = strings.Replace(p, ldir+"/", "", 1)
}
u.Path = filepath.Join(u.Path, p)
u.RawQuery = rq
return u.String()
}