38 lines
716 B
Go
38 lines
716 B
Go
package main
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import (
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"net/http"
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)
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type cacheEntry struct {
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r Response
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}
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func Cache(h http.Handler) http.Handler {
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c := make(map[string]cacheEntry)
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return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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if r.Method != "GET" {
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rw.WriteHeader(403)
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rw.Write([]byte("invalid request type"))
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return
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}
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entry, exists := c[r.URL.String()]
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if exists {
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entry.r.WriteResponse(rw)
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} else {
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rc := ResponseCollector{}
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// copy request in case they modify it
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req := *r
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h.ServeHTTP(&rc, &req)
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resp := rc.CollectResponse()
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if resp.Code == 200 {
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c[r.URL.String()] = cacheEntry{resp}
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}
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resp.WriteResponse(rw)
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}
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// TODO bookkeeping for the cache here
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})
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}
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