geohash的应用 附近地址搜索

http://en.wikipedia.org/wiki/Geohash

简单使用 geohash， redis，bottle, python-geohash 来实现 restful api的地理位置附近人搜素

from bottle import Bottle, run
import time
import json

from redis_pool import Redis                                                   
R = Redis().connection_pool() 

import geohash

app = Bottle()

@app.route('/v1/mark/<longitude:float>/<latitude:float>')
def mark_police(longitude, latitude):
    geo_encode = geohash.encode(longitude, latitude, 12)
    R.set(geo_encode, time.time())
    return json.dumps({"code":"success", "msg":{"geohash":geo_encode}})

@app.route('/v1/show/<longitude:float>/<latitude:float>')
def show(longitude, latitude):
    geo_encode = geohash.encode(longitude, latitude, 7)
    eight = geohash.expand(geo_encode)
    response = []
    for e in eight:
        response.extend([geohash.decode(i) for i in R.keys("%s*"%e)])
    return json.dumps({"code":"success", "msg":response})

run(server='eventlet', app=app, host='0.0.0.0', port=9090)

依赖的redis封装class

import redis

class Redis(object):
    pool=None
    R = None
    def __init__(self, host='localhost', port=6379, max_connections=2048):
        self.host=host
        self.port=port
        self.max_connections=int(max_connections)
        self.pool = redis.ConnectionPool(host=host, 
                port=port, db=0, 
                max_connections=max_connections)
    
    def connection_pool(self):
        if not self.R:
            self.R = redis.Redis(connection_pool=self.pool)
        return self.R

API 接口使用example

1. 标记 user 位置
http://localhost:9090/v1/mark/longitude/latitude

example: http://localhost:9090/v1/mark/12.1256/22.22

            

 {"msg": {"geohash": "s6pucxkhex8v"}, "code": "success"}

2. 用户请求周围1km内的 其他 user 位置信息
http://localhost:9090/v1/show/longitude/latitude

example: http://localhost:9090/v1/show/12.1256/22.22
              
             

 {"msg": [[12.123455917462707, 22.220000009983778], [12.125600008293986, 22.220000009983778]], "code": "success"}

注：
   longitude 经度
   latitude   纬度
   均为float 型