From e2475925ead1d1529ba4e3ae68ddb47634dc4417 Mon Sep 17 00:00:00 2001
From: "Frederick F. Kautz IV" <fkautz@alumni.cmu.edu>
Date: Fri, 24 Apr 2015 20:45:44 -0700
Subject: [PATCH] quota handlers now log against ip properly against a duration

---
 pkg/api/api_generic_handlers.go | 13 -----
 pkg/api/api_router.go           |  3 +-
 pkg/api/quota/quota_handler.go  | 84 +++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+), 14 deletions(-)
 create mode 100644 pkg/api/quota/quota_handler.go

diff --git a/pkg/api/api_generic_handlers.go b/pkg/api/api_generic_handlers.go
index 8933047ec..f7707cd61 100644
--- a/pkg/api/api_generic_handlers.go
+++ b/pkg/api/api_generic_handlers.go
@@ -145,16 +145,3 @@ func ignoreUnImplementedObjectResources(req *http.Request) bool {
 	}
 	return false
 }
-
-type quotaHandler struct {
-	handler http.Handler
-}
-
-func (h quotaHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	h.handler.ServeHTTP(w, req)
-}
-
-// QuotaHandler implements quotas
-func QuotaHandler(h http.Handler) http.Handler {
-	return quotaHandler{handler: h}
-}
diff --git a/pkg/api/api_router.go b/pkg/api/api_router.go
index fa2fcef44..233656a1c 100644
--- a/pkg/api/api_router.go
+++ b/pkg/api/api_router.go
@@ -22,6 +22,7 @@ import (
 
 	router "github.com/gorilla/mux"
 	"github.com/minio-io/minio/pkg/api/config"
+	"github.com/minio-io/minio/pkg/api/quota"
 	"github.com/minio-io/minio/pkg/iodine"
 	"github.com/minio-io/minio/pkg/storage/drivers"
 )
@@ -91,5 +92,5 @@ func HTTPHandler(domain string, driver drivers.Driver) http.Handler {
 
 	h := validateHandler(conf, ignoreResourcesHandler(mux))
 	// quota handler is always last
-	return QuotaHandler(h)
+	return quota.Handler(h, int64(100*1024*1024))
 }
diff --git a/pkg/api/quota/quota_handler.go b/pkg/api/quota/quota_handler.go
new file mode 100644
index 000000000..82d547a75
--- /dev/null
+++ b/pkg/api/quota/quota_handler.go
@@ -0,0 +1,84 @@
+/*
+ * Minimalist Object Storage, (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package quota
+
+import (
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+// map[minute][address] = current quota
+type quotaMap struct {
+	sync.RWMutex
+	data     map[int64]map[uint32]uint64
+	limit    uint64
+	duration int64
+}
+
+func (q *quotaMap) Add(ip uint32, size uint64) bool {
+	currentMinute := time.Now().Unix() / q.duration
+	expiredQuotas := (time.Now().Unix() / q.duration) - 5
+	for time := range q.data {
+		if time < expiredQuotas {
+			delete(q.data, time)
+		}
+	}
+	log.Println(currentMinute)
+	if _, ok := q.data[currentMinute]; !ok {
+		q.data[currentMinute] = make(map[uint32]uint64)
+	}
+	currentData, _ := q.data[currentMinute][ip]
+	q.data[currentMinute][ip] = currentData + size
+	return false
+}
+
+// HttpQuotaHandler
+type httpQuotaHandler struct {
+	handler http.Handler
+	quotas  *quotaMap
+}
+
+// ServeHTTP is an http.Handler ServeHTTP method
+func (h *httpQuotaHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	ipString := strings.Split(req.RemoteAddr, ":")[0]
+	ipSplit := strings.Split(ipString, ".")
+	q0, _ := strconv.Atoi(ipSplit[0])
+	q1, _ := strconv.Atoi(ipSplit[1])
+	q2, _ := strconv.Atoi(ipSplit[2])
+	q3, _ := strconv.Atoi(ipSplit[3])
+	longIP := uint32(q0)<<24 + uint32(q1)<<16 + uint32(q2)<<8 + uint32(q3)
+	h.quotas.Add(longIP, uint64(req.ContentLength))
+	log.Println("quota called")
+	log.Println(h.quotas)
+	h.handler.ServeHTTP(w, req)
+}
+
+// Handler implements quotas
+func Handler(h http.Handler, limit int64) http.Handler {
+	return &httpQuotaHandler{
+		handler: h,
+		quotas: &quotaMap{
+			data:     make(map[int64]map[uint32]uint64),
+			limit:    uint64(limit),
+			duration: int64(60),
+		},
+	}
+}