67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
package application
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import (
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"github.com/tiburon-777/OTUS_Project/previewer/cache"
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"github.com/tiburon-777/OTUS_Project/previewer/logger"
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"log"
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"net/http"
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"time"
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)
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func handler(c cache.Cache) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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q,err := BuildQuery(r.URL)
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if err!=nil {
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http.Error(w, "Can't parse query", http.StatusNotFound)
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return
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}
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b,ok := c.Get(cache.Key(q.id()))
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pic,ok := b.([]byte)
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if ok {
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log.Println("Взяли из кэша")
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writeResponce(w, nil,200,pic)
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return
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}
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pic,h,err := q.fromOrigin()
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if err != nil {
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http.Error(w, "Pic not found in origin", http.StatusNotFound)
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return
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}
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pic, err = q.resize(pic)
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if err != nil {
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http.Error(w, "Resizer kirdyk...", http.StatusInternalServerError)
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return
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}
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c.Set(cache.Key(q.id()),pic)
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writeResponce(w, h,200,pic)
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})
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}
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func loggingMiddleware(next http.Handler, l logger.Interface) http.HandlerFunc {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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defer func() {
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var path, useragent string
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if r.URL != nil {
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path = r.URL.Path
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}
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if len(r.UserAgent()) > 0 {
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useragent = r.UserAgent()
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}
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latency := time.Since(start)
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l.Infof("receive %s request from IP: %s on path: %s, duration: %s useragent: %s ", r.Method, r.RemoteAddr, path, latency, useragent)
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}()
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next.ServeHTTP(w, r)
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})
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}
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func writeResponce(w http.ResponseWriter, h http.Header, code int, body []byte) {
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for name, values := range h {
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for _, value := range values {
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w.Header().Add(name,value)
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}
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}
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_, _ = w.Write(body)
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}
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