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metakv.go
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metakv.go
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// A fake or mock metakv server for dev/testing purposes.
//
// To use...
//
// cd [cbgt main directory]
// go build ./cmd/metakv-mock
// ./metakv-mock
//
// And then...
//
// CBAUTH_REVRPC_URL=http://localhost:9000 go test -tags=metakv_test
//
package main
import (
"bufio"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
type KvEntry struct {
Path string
Value []byte
Rev []byte
}
type dataEntry struct {
K KvEntry
w *http.ResponseWriter
}
type listEntry struct {
path string
b *bufio.ReadWriter
}
var store map[string]*dataEntry
var list []*listEntry
var rpcBody string = "{\"jsonrpc\":\"2.0\",\"id\":0,\"method\":\"AuthCacheSvc.UpdateDB\",\"params\":[{\"specialUser\":\"@fts-cbauth\",\"nodes\":[{\"host\":\"127.0.0.1\",\"user\":\"_admin\",\"password\":\"c55756e3cf12269e4b49eb8cba10389d\",\"ports\":[9000,9200,9100,9101,9102,9103,9104,9105,9500,10000,12000,12001,9499],\"local\":true}],\"buckets\":[{\"name\":\"gamesim-sample\",\"password\":\"\"}],\"tokenCheckURL\":\"http://127.0.0.1:9000/_cbauth\",\"admin\":{\"user\":\"Administrator\",\"salt\":\"h+bTDx1y7VfNymzHos93kQ==\",\"mac\":\"XFaBj6SzQyzkNYMnRzt117OAhB0=\"}}]}"
func sendData(w http.ResponseWriter, p string) {
data := []byte{}
for k, v := range store {
if strings.HasPrefix(k, p) && v.K.Rev != nil {
fmt.Printf("sending data from all data %v", v.K)
val, _ := json.Marshal(v.K)
data = append(data, val...)
}
}
w.Write(data)
}
func sendAllData(w http.ResponseWriter, p string) {
var header string = "HTTP/1.1 200 OK\r\n" +
"Transfer-Encoding: chunked\r\n" +
"Server: Couchbase Server\r\n" +
"Pragma: no-cache\r\n" +
"Content-Type: application/json; charset=utf-8\r\n" +
"Cache-Control: no-cache\r\n\r\n"
hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "webserver doesn't support hijacking", http.StatusInternalServerError)
return
}
_, bufrw, err := hj.Hijack()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
bufrw.WriteString(header)
bufrw.Flush()
list = append(list, &listEntry{p, bufrw})
for k, v := range store {
if strings.HasPrefix(k, p) && v.K.Rev != nil {
fmt.Printf("sending data from all data %v", v.K)
val, _ := json.Marshal(v.K)
bufrw.WriteString(fmt.Sprintf("%x", len(val)) + "\r\n")
bufrw.Write(val)
bufrw.WriteString("\r\n")
}
}
}
func checkList(path string, body []byte) {
for _, val := range list {
if strings.HasPrefix(val.path, path) {
fmt.Printf("sending body %v", body)
bufrw := val.b
bufrw.WriteString(fmt.Sprintf("%x", len(body)) + "\r\n")
bufrw.Write(body)
bufrw.WriteString("\r\n")
}
}
}
func HandleRPC(w http.ResponseWriter) {
hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "webserver doesn't support hijacking",
http.StatusInternalServerError)
return
}
_, bufrw, err := hj.Hijack()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// send a dummy response for rpc connect. We should not close the
// connection else EOF error is thrown by cbauth client.
data := rpcBody
var header string = "HTTP/1.1 200 OK\r\n" +
"Server: Couchbase Server\r\n" +
"Content-Length: %d\r\n" +
"Content-Type: application/json; charset=utf-8\r\n\r\n"
bufrw.WriteString(fmt.Sprintf(header, len(data)))
bufrw.Write([]byte(data))
bufrw.WriteString("\r\n")
bufrw.Flush()
val := make([]byte, 1000)
go func() {
for {
bufrw.Read(val)
}
}()
}
func parseBody(body string) map[string]string {
m := make(map[string]string)
for _, v := range strings.Split(body, "&") {
k := strings.Split(v, "=")
m[k[0]] = k[1]
}
return m
}
func viewHandler(w http.ResponseWriter, r *http.Request) {
fmt.Println("got request ", r.URL.Path)
if r.Method == "RPCCONNECT" {
HandleRPC(w)
return
}
if r.Method == "PUT" {
body, _ := ioutil.ReadAll(r.Body)
fmt.Printf("got body %s", body)
b := parseBody(string(body))
x, _ := url.Parse(b["value"])
v := x.Path
en := KvEntry{
Path: r.URL.Path,
Value: []byte(v),
Rev: []byte("1"),
}
fmt.Printf("storing entry is %v", en)
store[r.URL.Path] = &dataEntry{K: en}
w.WriteHeader(http.StatusOK)
val, _ := json.Marshal(en)
checkList(r.URL.Path, val)
return
}
query := r.URL.Query()
fmt.Println("query params are ", query, "path ", r.URL.Path)
for _, v := range query["feed"] {
if v == "continuous" {
fmt.Println("inside continuous")
sendAllData(w, r.URL.Path)
}
return
}
if r.URL.Path[len(r.URL.Path)-1] == '/' {
sendData(w, r.URL.Path)
} else {
v := store[r.URL.Path]
if v == nil {
val, _ := json.Marshal(dataEntry{})
w.Write(val)
return
}
val, _ := json.Marshal(v.K)
w.Write(val)
}
}
func main() {
store = make(map[string]*dataEntry)
http.HandleFunc("/", viewHandler)
http.ListenAndServe(":9000", nil)
}