Difrex/zoorest
Difrex/zoorest
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master ... v0.2

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1
.travis.yml
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@ -2,7 +2,6 @@ language: go
go:
- 1.6
- 1.7
- 1.8
# tests script
script:

54
README.md
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@ -2,6 +2,7 @@
[![Build Status](https://travis-ci.org/Difrex/zoorest.svg?branch=master)](https://travis-ci.org/Difrex/zoorest)
Zookeeper HTTP rest API
<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-generate-toc again -->
**Table of Contents**
@ -13,8 +14,6 @@ Zookeeper HTTP rest API
- [Get node data](#get-node-data)
- [Errors](#errors)
- [Create node recursive](#create-node-recursive)
- [Create node children](#create-node-children)
- [Errors](#errors)
- [Update node](#update-node)
- [Errors](#errors)
- [Delete node recursive](#delete-node-recursive)
@ -24,37 +23,24 @@ Zookeeper HTTP rest API
- [Docker build](#docker-build)
- [Binary file](#binary-file)
- [Docker image](#docker-image)
- [Get docker image](#get-docker-image)
- [AUTHORS](#authors)
- [LICENSE](#license)
- [DONATE](#donate)
<!-- markdown-toc end -->
## Usage
```
Usage of ./zoorest:
-listen string
Address to listen (default "127.0.0.1:8889")
-mc
Enable memcached support
-mchosts string
Memcached servers. Comma separated (default "127.0.0.1:11211")
-mcprefix string
Memcached key prefix (default "zoorest")
-path string
Zk root path (default "/")
-zk string
Zk servers. Comma separated (default "127.0.0.1:2181")
```
NOTE: If memcached support is enabled zkStat metrics will not be returned.
Tupical usage scheme:
[![tupical usage](img/usage.png)](img/usage.png)
## API
### List node childrens
@ -136,25 +122,6 @@ curl -XPUT http://127.0.0.1:8889/v1/up/two/three/four -d '{"four": "json"}'
/zoorest/two/three/four
```
### Create node children
Method: **PATCH**
Location: **/v1/up**
Return string with created children path
```
curl -XPATCH http://127.0.0.1:8889/v1/up/one/test -d 'test'
/one/test
```
#### Errors
```
curl -XPATCH http://127.0.0.1:8889/v1/up/six/test -d '{"six": "json"}'
zk: node does not exist
```
### Update node
Method: **POST**
@ -249,18 +216,6 @@ cd zoorest
Image will be tagged as zoorest:latest
## Get docker image
Pull image
```
docker pull lessmore/zoorest
```
And run it
```
/usr/bin/docker run -d -p 8889:8889 --name zoorest lessmore/zoorest:latest --zk zoo1:2181,zoo2:2181,zoo3:2181 --path /zoorest/jail --listen 0.0.0.0:8889 -mc -mchosts mc1:11211,mc2:11211,mc3:11211
```
# AUTHORS
Denis Zheleztsov <difrex.punk@gmail.com>
@ -268,8 +223,3 @@ Denis Zheleztsov <difrex.punk@gmail.com>
# LICENSE
GPLv3 see [LICENSE](LICENSE)
# DONATE
BTC 1JCmZQdESKPCrcjUxDRNgt5HaSgUEWZ8pV<br>
DASH XxEWcJgfiAav1gxTtVLGXqE5T66uMA7te7

2
build.sh
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@ -16,7 +16,7 @@ ENTRYPOINT go build -ldflags "-linkmode external -extldflags -static" && mv zoor
EOF
# Build builder
docker build --no-cache -t zoorest_builder -f Dockerfile.builder .
docker build -t zoorest_builder -f Dockerfile.builder .
# Build bin
docker run -v $(pwd)/out:/out zoorest_builder

BIN
img/usage.png
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30
main.go
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@ -10,9 +10,6 @@ var (
zk string
listen string
path string
mc bool
mcHosts string
mcPrefix string
)
// init ...
@ -20,39 +17,24 @@ func init() {
flag.StringVar(&zk, "zk", "127.0.0.1:2181", "Zk servers. Comma separated")
flag.StringVar(&listen, "listen", "127.0.0.1:8889", "Address to listen")
flag.StringVar(&path, "path", "/", "Zk root path")
flag.BoolVar(&mc, "mc", false, "Enable memcached support")
flag.StringVar(&mcHosts, "mchosts", "127.0.0.1:11211", "Memcached servers. Comma separated")
flag.StringVar(&mcPrefix, "mcprefix", "zoorest", "Memcached key prefix")
flag.Parse()
}
// main ...
func main() {
var z rest.Zk
hosts := getSlice(zk, ",")
hosts := strings.Split(zk, ",")
z.Hosts = hosts
conn, err := z.InitConnection()
if err != nil {
panic(err)
}
var zoo rest.ZooNode
zoo.Path = path
zoo.Conn = conn
zoo.Zoo = z
var MC rest.MC
MC.Hosts = getSlice(mcHosts, ",")
MC.Prefix = mcPrefix
MC.Enabled = mc
MC.Client = MC.InitConnection()
zoo.MC = MC
zoo := rest.ZooNode{
path,
conn,
z,
}
rest.Serve(listen, zoo)
}
// getSlice returm slice
func getSlice(s string, delimeter string) []string {
return strings.Split(s, ",")
}

17
rest/api.go
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@ -90,8 +90,6 @@ func (zk ZooNode) UP(w http.ResponseWriter, r *http.Request) {
go func() { ch <- zk.CreateNode(path, content) }()
} else if r.Method == "POST" {
go func() { ch <- zk.UpdateNode(path, content) }()
} else if r.Method == "PATCH" {
go func() { ch <- zk.CreateChild(path, content) }()
} else {
e := strings.Join([]string{"Method", r.Method, "not alowed"}, " ")
w.WriteHeader(500)
@ -117,6 +115,8 @@ func (zk ZooNode) RM(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
path := vars["path"]
var rmPath string
rmPath = strings.Join([]string{zk.Path, path}, "")
if path == "/" {
e := "Skiping root path"
w.WriteHeader(500)
@ -124,9 +124,6 @@ func (zk ZooNode) RM(w http.ResponseWriter, r *http.Request) {
return
}
var rmPath string
rmPath = strings.Join([]string{zk.Path, path}, "")
if strings.Contains(rmPath, "//") {
rmPath = strings.Replace(rmPath, "//", "/", 1)
}
@ -134,7 +131,7 @@ func (zk ZooNode) RM(w http.ResponseWriter, r *http.Request) {
go func() { zk.RMR(rmPath) }()
w.WriteHeader(200)
w.Write([]byte(path))
w.Write([]byte(rmPath))
}
// GET ...
@ -174,10 +171,10 @@ func (zk ZooNode) GET(w http.ResponseWriter, r *http.Request) {
func Serve(listen string, zk ZooNode) {
r := mux.NewRouter()
r.HandleFunc("/v1/ls{path:[A-Za-z0-9-_/.:]+}", zk.LS)
r.HandleFunc("/v1/get{path:[A-Za-z0-9-_/.:]+}", zk.GET)
r.HandleFunc("/v1/rmr{path:[A-Za-z0-9-_/.:]+}", zk.RM)
r.HandleFunc("/v1/up{path:[A-Za-z0-9-_/.:]+}", zk.UP)
r.HandleFunc("/v1/ls{path:[a-z0-9-_/.:]+}", zk.LS)
r.HandleFunc("/v1/get{path:[a-z0-9-_/.:]+}", zk.GET)
r.HandleFunc("/v1/rmr{path:[a-z0-9-_/.:]+}", zk.RM)
r.HandleFunc("/v1/up{path:[a-z0-9-_/.:]+}", zk.UP)
http.Handle("/", r)

69
rest/cache.go
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@ -1,69 +0,0 @@
package rest
import (
"crypto/md5"
"encoding/base64"
"github.com/bradfitz/gomemcache/memcache"
"strings"
)
// Memcached connection settings
type MC struct {
Enabled bool `json:"enabled"`
Hosts []string `json:"hosts"`
Prefix string `json:"prefix"`
Client *memcache.Client
}
// InitConnection to memcached cluster
func (mc MC) InitConnection() *memcache.Client {
client := memcache.New(mc.Hosts...)
return client
}
// StoreToCache save data to memecache
func (mc MC) StoreToCache(key string, data []byte) error {
prefixed_key := strings.Join([]string{mc.Prefix, key}, "_")
var item memcache.Item
// item.Key = hashKey(prefixed_key)
item.Key = hashKey(prefixed_key)
item.Value = data
// store
err := mc.Client.Set(&item)
return err
}
// GetFromCache get node data from memcache
func (mc MC) GetFromCache(key string) ([]byte, error) {
var data *memcache.Item
prefixed_key := strings.Join([]string{mc.Prefix, key}, "_")
data, err := mc.Client.Get(hashKey(prefixed_key))
if err != nil {
return []byte(""), err
}
return data.Value, err
}
// DeleteFromCache delete key from memcache
func (mc MC) DeleteFromCache(key string) error {
prefixed_key := strings.Join([]string{mc.Prefix, key}, "_")
err := mc.Client.Delete(hashKey(prefixed_key))
return err
}
// hashKey return base64 encoded md5sum of prefixed_key
func hashKey(key string) string {
h := md5.New()
sum := h.Sum([]byte(key))
b64 := base64.StdEncoding.EncodeToString(sum)
return b64
}

96
rest/zoo.go
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@ -3,7 +3,6 @@ package rest
import (
"github.com/samuel/go-zookeeper/zk"
"log"
"sort"
"strings"
"time"
)
@ -13,7 +12,6 @@ type ZooNode struct {
Path string
Conn *zk.Conn
Zoo Zk
MC MC
}
//Zk Zookeeper connection settings
@ -27,13 +25,13 @@ type Zk struct {
func (conf Zk) InitConnection() (*zk.Conn, error) {
conn, _, err := zk.Connect(conf.Hosts, time.Second)
if err != nil {
log.Fatal("[ERROR] ", err)
log.Panic("[ERROR] ", err)
}
return conn, err
}
// GetChildrens get Zookeeper node childrens
// GetChildrens ...
func (z ZooNode) GetChildrens(path string) Ls {
var lsPath string
lsPath = strings.Join([]string{z.Path, path}, "")
@ -45,23 +43,10 @@ func (z ZooNode) GetChildrens(path string) Ls {
lsPath = strings.Replace(lsPath, "//", "/", 1)
}
log.Print("V1 LS: ", lsPath)
log.Print("ls: ", lsPath)
var l Ls
l.State = "OK"
l.Path = path
// if z.MC.Enabled {
// data, err := z.MC.GetFromCache(lsPath)
// if err != nil {
// log.Print("V1 LS ERROR: ", err.Error())
// } else {
// log.Print("We are get it from memecache!")
// childrens := strings.Split(string(data), ",")
// l.Childrens = childrens
// return l
// }
// }
childrens, zkStat, err := z.Conn.Children(lsPath)
if err != nil {
@ -70,25 +55,15 @@ func (z ZooNode) GetChildrens(path string) Ls {
return l
}
// // Store to cache
// if z.MC.Enabled {
// err := z.MC.StoreToCache(lsPath, []byte(strings.Join(childrens, ",")))
// if err != nil {
// log.Print("V1 LS: ", err.Error())
// }
// }
// Sort childrens alphabeticaly
sort.Strings(childrens)
l.Error = ""
l.Childrens = childrens
l.Path = path
l.ZkStat = zkStat
return l
}
// GetNode data
// GetNode ...
func (z ZooNode) GetNode(path string) Get {
var getPath string
getPath = strings.Join([]string{z.Path, path}, "")
@ -100,21 +75,10 @@ func (z ZooNode) GetNode(path string) Get {
getPath = strings.Replace(getPath, "//", "/", 1)
}
log.Print("V1 GET: ", getPath)
log.Print("get: ", getPath)
var g Get
g.State = "OK"
g.Path = path
// Get data from memcached
if z.MC.Enabled {
if data, err := z.MC.GetFromCache(getPath); err != nil {
log.Print("[mc ERROR] ", err.Error())
} else {
g.Data = data
return g
}
}
data, zkStat, err := z.Conn.Get(getPath)
if err != nil {
@ -123,16 +87,9 @@ func (z ZooNode) GetNode(path string) Get {
return g
}
// Store to cache
if z.MC.Enabled {
err := z.MC.StoreToCache(getPath, data)
if err != nil {
log.Print("[mc ERROR] ", err.Error())
}
}
g.Error = ""
g.Data = data
g.Path = path
g.ZkStat = zkStat
return g
@ -155,16 +112,9 @@ func (z ZooNode) RMR(path string) {
err = z.Conn.Delete(path, -1)
if err != nil {
log.Print("[zk ERROR] ", err)
} else {
if z.MC.Enabled {
err := z.MC.DeleteFromCache(path)
if err != nil {
log.Print("[mc ERROR] ", err.Error())
}
}
log.Print("[WARNING] ", path, " deleted")
}
}
// CreateNode ...
func (z ZooNode) CreateNode(path string, content []byte) string {
@ -184,7 +134,7 @@ func (z ZooNode) CreateNode(path string, content []byte) string {
return z.UpdateNode(path, content)
}
// UpdateNode update existing node
// UpdateNode ...
func (z ZooNode) UpdateNode(path string, content []byte) string {
upPath := strings.Join([]string{z.Path, path}, "")
if strings.Contains(upPath, "//") {
@ -199,36 +149,6 @@ func (z ZooNode) UpdateNode(path string, content []byte) string {
return err.Error()
}
if z.MC.Enabled {
if err := z.MC.StoreToCache(upPath, content); err != nil {
log.Print("[mc ERROR] ", err.Error())
}
}
return path
}
// CreateChild create child in /node/path
func (z ZooNode) CreateChild(path string, content []byte) string {
crPath := strings.Join([]string{z.Path, path}, "")
if strings.Contains(crPath, "//") {
crPath = strings.Replace(crPath, "//", "/", 1)
}
if crPath == "/" {
return "Not updating root path"
}
_, err := z.Conn.Create(crPath, content, 0, zk.WorldACL(zk.PermAll))
if err != nil {
return err.Error()
}
if z.MC.Enabled {
if err := z.MC.StoreToCache(crPath, content); err != nil {
log.Print("[mc ERROR] ", err.Error())
}
}
return path
}