66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
/*
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* Minimalist Object Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package quota
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import (
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"encoding/binary"
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"net"
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"net/http"
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"time"
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"github.com/minio/minio/pkg/utils/log"
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)
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// requestLimitHandler
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type requestLimitHandler struct {
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handler http.Handler
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quotas *quotaMap
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}
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//convert a uint32 to an ipv4
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func uint32ToIP(ip uint32) net.IP {
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addr := net.IP{0, 0, 0, 0}
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binary.BigEndian.PutUint32(addr, ip)
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return addr
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}
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// ServeHTTP is an http.Handler ServeHTTP method
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func (h *requestLimitHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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host, _, _ := net.SplitHostPort(req.RemoteAddr)
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longIP := longIP{net.ParseIP(host)}.IptoUint32()
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if h.quotas.IsQuotaMet(longIP) {
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hosts, _ := net.LookupAddr(uint32ToIP(longIP).String())
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log.Debug.Printf("Offending Host: %s, RequestUSED: %d\n", hosts, h.quotas.GetQuotaUsed(longIP))
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writeErrorResponse(w, req, SlowDown, req.URL.Path)
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}
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h.quotas.Add(longIP, 1)
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h.handler.ServeHTTP(w, req)
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}
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// RequestLimit sets a quote based upon number of requests allowed over a time period
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func RequestLimit(h http.Handler, limit int64, duration time.Duration) http.Handler {
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return &requestLimitHandler{
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handler: h,
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quotas: "aMap{
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data: make(map[int64]map[uint32]int64),
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limit: int64(limit),
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duration: duration,
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segmentSize: segmentSize(duration),
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},
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}
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}
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