Caleb Gardner
40 lines
851 B
Go
40 lines
851 B
Go
package blog
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import (
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"log"
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"net/http"
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"sync"
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)
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type HTMXReturner func(http.ResponseWriter, *http.Request) (string, error)
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type Backend struct {
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cacheMutex sync.RWMutex
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cache map[string]string
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}
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func (b *Backend) AddToMux(mux *http.ServeMux) {
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mux.HandleFunc("GET /editor/{page}", b.editorPage)
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}
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func (b *Backend) cacheMiddleware(h HTMXReturner) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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b.cacheMutex.RLock()
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if pag, ok := b.cache[r.URL.EscapedPath()]; ok {
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w.Write([]byte(pag))
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b.cacheMutex.RUnlock()
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return
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}
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b.cacheMutex.RUnlock()
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b.cacheMutex.Lock()
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defer b.cacheMutex.Unlock()
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res, err := h(w, r)
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if err != nil {
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log.Printf("error getting %v: %v", r.URL.EscapedPath(), err)
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} else {
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b.cache[r.URL.EscapedPath()] = res
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}
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w.Write([]byte(res))
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})
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}
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