flask cache with memcache

一开始 flask的cache type是 simple，然后在生产环境 可不能这么用吧，然后开始研究用memcached，然后一直出错。出错的原因是 libmemcached的版本和pylibmc的版本不对，然后，我结局了他就好了，这里就不标明如何搭建环境了，值得提醒的是，在pip 安装包的时候一定要指定好版本。

代码如下：

config.py

(pythonenv)[xluren@test Flask-Cache_for_memcached_06]$ cat config.py
import os
class Config(object):
    DEBUG=True
    CACHE_TYPE = 'memcached'
    SECRET_KEY = "d73b04b0e696b0945283defa3eee4538"
    BASE_DIR = os.path.abspath(os.path.dirname(__file__))  
    SQLALCHEMY_DATABASE_URI = 'sqlite:///' + os.path.join(BASE_DIR, 'app.db')
    CACHE_MEMCACHED_SERVERS=["10.210.71.145:11211"]

class MysqlConfig(Config):
    SQLALCHEMY_DATABASE_URI = 'mysql://hello:[email protected]:3306/sqlalchemy'
class MongoDBConfig(Config):
    MONGOALCHEMY_DATABASE="mydb"
    MONGOALCHEMY_SERVER="10.210.71.145"
    MONGOALCHEMY_PORT=8888
POST_PER_PAGE = 3 

run.py

(pythonenv)[xluren@test Flask-Cache_for_memcached_06]$ cat run.py 
from flask import Flask
import random

# import the flask extension
from flask.ext.cache import Cache   

app = Flask(__name__)

#import config setting
app.config.from_object("config.Config")

# register the cache instance and binds it on to your app 
app.cache = Cache(app)   

@app.route("/")
@app.cache.cached(timeout=500,key_prefix="hello")  # cache this view for 30 seconds
def cached_view():
    a=random.randint(0,100)
    return str(a)

if __name__ == "__main__":
    app.run(port=5000, debug=True, host='0.0.0.0')

github ,stackoverflow 是一对好基友，好工具啊。

cache 验证的代码：

<?php
	$mem = new Memcache;
	$mem->connect("127.0.0.1",  11211);
 
    #add 
	$mem->set('key1', 'This is first value', 0, 60);
	$val = $mem->get('key1');
	echo "Get key1 value: " . $val ."\n";
	 
    #modify
	$mem->replace('key1', 'This is replace value', 0, 60);
	$val = $mem->get('key1');
	echo "Get key1 value: " . $val . "\n";
	 
    #insert array
	$arr = array('aaa', 'bbb', 'ccc', 'ddd');
	$mem->set('key2', $arr, 0, 60);
	$val2 = $mem->get('key2');
	echo "Get key2 value: ";
	print_r($val2);
	echo "\n";
	 
    #delete 
	$mem->delete('key1');
	$val = $mem->get('key1');
	echo "Get key1 value: " . $val . "\n";
	 
    #add 
	$mem->set('key1', 'This is k1 value', 0, 60);
	$val = $mem->get('key1');
	echo "Get key1 value: " . $val ."\n";

    #add 
	$mem->set('key2', 'This is k2 value', 0, 60);
	$val = $mem->get('key2');
	echo "Get key2 value: " . $val ."\n";


    #add 
	$mem->set('key3', 'This is k3 value', 0, 60);
	$val = $mem->get('key3');
	echo "Get key3 value: " . $val ."\n";

    $items=$mem->getExtendedStats("items");
    $host="127.0.0.1";
    $port=11211;

    $items=$items["$host:$port"]['items'];
    print "###############";
    print_r($items);
    print "###############";
    foreach($items as $key=>$values)
    {
        $number=$key;
        $str=$mem->getExtendedStats ("cachedump",$number,0);
        $line=$str["$host:$port"];
        if( is_array($line) && count($line)>0)
        {
            foreach($line as $key=>$value)
            {
                echo $key.'=>';
                print_r($mem->get($key));
                echo "\r\n";
            }
        }
    }
 
	$mem->flush();
	$val2 = $mem->get('key2');
	echo "Get key2 value: ";
	print_r($val2);
	echo "\n";
	$mem->close();
?>

验证的时候，页面会有直观的体现，同时，通过代码访问memcached的，得到的效果更佳真实

太爽了。