Beispiel #1
0
func requestHandler(ctx *fasthttp.RequestCtx) {
	h := &ctx.Request.Header
	if !ctx.IsGet() {
		ctx.Error("Method not allowed", fasthttp.StatusMethodNotAllowed)
		return
	}

	if string(ctx.RequestURI()) == *statsRequestPath {
		var w bytes.Buffer
		stats.WriteToStream(&w)
		ctx.Success("text/plain", w.Bytes())
		return
	}

	if len(h.Peek("If-None-Match")) > 0 {
		resp := &ctx.Response
		resp.SetStatusCode(fasthttp.StatusNotModified)
		resp.Header.Set("Etag", "W/\"CacheForever\"")
		atomic.AddInt64(&stats.IfNoneMatchHitsCount, 1)
		return
	}

	v := keyPool.Get()
	if v == nil {
		v = make([]byte, 128)
	}
	key := v.([]byte)
	key = append(key[:0], getRequestHost(h)...)
	key = append(key, ctx.RequestURI()...)
	item, err := cache.GetDeItem(key, time.Second)
	if err != nil {
		if err != ybc.ErrCacheMiss {
			logFatal("Unexpected error when obtaining cache value by key=[%s]: [%s]", key, err)
		}

		atomic.AddInt64(&stats.CacheMissesCount, 1)
		item = fetchFromUpstream(h, key)
		if item == nil {
			ctx.Error("Service unavailable", fasthttp.StatusServiceUnavailable)
			return
		}
	} else {
		atomic.AddInt64(&stats.CacheHitsCount, 1)
	}
	defer item.Close()
	keyPool.Put(v)

	contentType, err := loadContentType(h, item)
	if err != nil {
		ctx.Error("Internal Server Error", fasthttp.StatusInternalServerError)
		return
	}

	rh := &ctx.Response.Header
	rh.Set("Etag", "W/\"CacheForever\"")
	rh.Set("Cache-Control", "public, max-age=31536000")
	buf := item.Value()
	buf = buf[len(buf)-item.Available():]
	ctx.Success(contentType, buf)
	atomic.AddInt64(&stats.BytesSentToClients, int64(len(buf)))
}
Beispiel #2
0
// Test 6: Plaintext
func plaintextHandler(ctx *fasthttp.RequestCtx) {
	ctx.Success("text/plain", helloWorldBytes)
}