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81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
4 years ago
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/*
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Copyright 2017 The KUAR Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 memory
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import (
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"net/http"
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"runtime"
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"runtime/debug"
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"strconv"
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"github.com/julienschmidt/httprouter"
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"github.com/kubernetes-up-and-running/kuard/pkg/apiutils"
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)
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type MemoryAPI struct {
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leaks [][]byte
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}
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// MemoryStatus is returned from a GET to this API endpoing
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type MemoryStatus struct {
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MemStats runtime.MemStats `json:"memStats"`
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}
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func New() *MemoryAPI {
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return &MemoryAPI{}
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}
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func (e *MemoryAPI) AddRoutes(r *httprouter.Router, base string) {
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r.GET(base+"/api", e.APIGet)
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r.POST(base+"/api/alloc", e.APIAlloc)
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r.POST(base+"/api/clear", e.APIClear)
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}
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func (e *MemoryAPI) APIGet(w http.ResponseWriter, _ *http.Request, _ httprouter.Params) {
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resp := &MemoryStatus{}
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runtime.ReadMemStats(&resp.MemStats)
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apiutils.ServeJSON(w, resp)
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}
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func (m *MemoryAPI) APIAlloc(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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sSize := r.URL.Query().Get("size")
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if len(sSize) == 0 {
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http.Error(w, "size not specified", http.StatusBadRequest)
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return
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}
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i, err := strconv.ParseInt(sSize, 10, 64)
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if err != nil {
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http.Error(w, "bad size param", http.StatusBadRequest)
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}
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leak := make([]byte, i, i)
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for i := 0; i < len(leak); i++ {
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leak[i] = 'x'
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}
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m.leaks = append(m.leaks, leak)
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}
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func (m *MemoryAPI) APIClear(w http.ResponseWriter, _ *http.Request, _ httprouter.Params) {
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m.leaks = nil
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runtime.GC()
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debug.FreeOSMemory()
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}
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