youtube handling + special site handling framework

loader.go

@@ -0,0 +1,43 @@
+package imagorvideoextended
+
+import (
+	"github.com/cshum/imagor"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+/*
+	This was started to handle YouTube, however it turns out they leak just enough info to be useful in the processing
+	phase. This can still be used for sites that have more info in the URL than the connection, though.
+	Currently unloaded to eke out some more perf
+*/
+
+type LoaderOption func(h *SpecialLoader)
+
+// SpecialLoader HTTP Loader implements imagor.Loader interface
+type SpecialLoader struct {
+}
+
+func NewSpecialLoader(options ...LoaderOption) *SpecialLoader {
+	loader := &SpecialLoader{}
+	for _, option := range options {
+		option(loader)
+	}
+	return loader
+}
+
+func (loader *SpecialLoader) Get(_ *http.Request, key string) (*imagor.Blob, error) {
+	components, err := url.Parse(key)
+	if err != nil {
+		return nil, imagor.ErrInvalid
+	}
+	hostname := components.Hostname()
+	if trimmed, ok := strings.CutPrefix(hostname, "www."); ok {
+		hostname = trimmed
+	}
+	switch components.Hostname() {
+	default:
+		return nil, imagor.ErrInvalid
+	}
+}