Openwrt路由器上開發微信公衆號應用

利用nohup命令建立啓動服務

nohup, /dev/null 2>&1,輸出重定向

http://www.cnblogs.com/taosim/articles/2610170.html

Linux 技巧：讓進程在後臺可靠運行的幾種方法

https://www.ibm.com/developerworks/cn/linux/l-cn-nohup/

[root@PandoraBox:/mnt/sda1/projects/openwrtpytest/utils]#opkg -d usb install /mn

t/sda1/ipk/coreutils_8.16-1_ramips_24kec.ipk

Installing coreutils (8.16-1) to usb...

Configuring coreutils.

[root@PandoraBox:/mnt/sda1/projects/openwrtpytest/utils]#opkg -d usb install /mn

t/sda1/ipk/coreutils-nohup_8.16-1_ramips_24kec.ipk

Installing coreutils-nohup (8.16-1) to usb...

Configuring coreutils-nohup.

後面的&是後臺運行

Linux shell中有三種輸入輸出，分別爲標準輸入，標準輸出，錯誤輸出，分別對應0，1，2

ps命令沒法看到nohup的job,用jobs -l

 

用nohup執行python程序時，print沒法輸出

nohup python test.py > nohup.out 2>&1 &

發現nohup.out中顯示不出來python程序中print的東西。

這是由於python的輸出有緩衝，致使nohup.out並不可以立刻看到輸出。

python 有個-u參數，使得python不啓用緩衝。

nohup python -u test.py > nohup.out 2>&1 &

 

建立啓動服務

/etc/init.d/wechat

#!/bin/sh /etc/rc.common
# Example script  
# Copyright (C) 2007 OpenWrt.org  
   
START=10  
STOP=15  
   
start() {          
        echo "wechat start" >> /mnt/sda1/temp/log
		date -R >> /mnt/sda1/temp/log
        nohup python -u /mnt/sda1/projects/openwrtpytest/utils/webhelper.py 2>>/mnt/sda1/temp/log 1>>/mnt/sda1/temp/log &

        # commands to launch application  
}                   
   
stop() {            
        echo "wechat stop" >> /mnt/sda1/temp/log
		date -R >> /mnt/sda1/temp/log
        # commands to kill application   

　　

chmod 777 /etc/init.d/wechat

啓動

/etc/init.d/wechat start

注意wechat裏面的\r\n要換成linux下的\n，否則會出錯

若是重複啓動後報錯端口被佔用，要先把原先的進程殺掉

error: [Errno 125] Address already in use

[root@PandoraBox:/mnt/sda1/projects/openwrtpytest/utils]#netstat -atpn | grep 8001

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

tcp 0 0 0.0.0.0:8001 0.0.0.0:* LISTEN 2626/python

kill 2626

 

webhelper.py

from wsgiref.simple_server import make_server
from wechat import app

PORT = 8001
httpd = make_server('', PORT, app)
httpd.allow_reuse_address = True
httpd.serve_forever()

 

 wechat.py

#!/mnt/sda1/opkg/usr/bin/python
#coding:utf-8
import sys
reload(sys)
sys.setdefaultencoding('utf8')
import time
from flask import Flask, request,make_response,render_template
import hashlib
import xml.etree.ElementTree as ET
import loghelper
import traceback
import requests
import os
import pprint
import uniout
import apihelper
import yaml
import pickledb


app = Flask(__name__)
app.debug=True
logger = loghelper.create_logger(r'/mnt/sda1/temp/log')
app_root = os.path.dirname(__file__)
templates_root = os.path.join(app_root, 'templates/reply_text.xml')
api = apihelper.ApiHelper()
cachefpath='../data/cache.db'
cachedb = pickledb.load(cachefpath,True)


@app.route('/',methods=['GET','POST'])
def wechat_auth():
    msg = "funcname : %s , request.args : %s" % (__name__ ,request.args)
    logger.info(msg)
    response = make_response("")
    try:
        if request.method == 'GET':
            token='weixintest'
            data = request.args
            pprint.pprint( "Request get data:",data)
            signature = data.get('signature','')
            timestamp = data.get('timestamp','')
            nonce = data.get('nonce','')
            echostr = data.get('echostr','')
            s = [timestamp,nonce,token]
            s.sort()
            s = ''.join(s)
            if (hashlib.sha1(s).hexdigest() == signature):
                response  = make_response(echostr)
            else:
                response  = make_response("Not Valid!")
        else:
            rec = request.stream.read()
            print "Request post data:",rec
            xml_rec = ET.fromstring(rec)
            datadict = get_replydata(xml_rec)
            pprint.pprint(datadict)
            render = render_template("reply_text.xml",dict=datadict)
            response = make_response(render)
            #xml_rep = get_response(xml_rec)
            #response = make_response(xml_rep)
            response.content_type='application/xml;charset=utf-8'
    except Exception,e:
            type =xml_rec.find("MsgType").text
            tou = xml_rec.find('ToUserName').text
            fromu = xml_rec.find('FromUserName').text
            datadict = {"to":fromu,"from":tou,"time":str(int(time.time())),"type":type,"msg":e.message}
            render = render_template("reply_text.xml",dict=datadict)
            response = make_response(render)
            # log the exception
            err = "exception : %s , %s" % (e.message ,traceback.format_exc())
            logger.exception(err)
    finally:
        #pprint.pprint( request.__dict__)
        pprint.pprint( response.__dict__)
        return response

def get_replydata(xml_rec):
    '''
    import xml2dict
    xml = xml2dict.XML2Dict()
    r = xml.fromstring(textdata)
    r.get('xml').get('FromUserName').get('value')
    '''
    type =xml_rec.find("MsgType").text
    tou = xml_rec.find('ToUserName').text
    fromu = xml_rec.find('FromUserName').text
    datadict = {"to":fromu,"from":tou,"time":str(int(time.time())),"type":type,"msg":""}
    if type == 'image' or type == 'voice':
        dmedia_id = xml_rec.find('MediaId').text
        purl = xml_rec.find('PicUrl').text
        fname = xml_rec.find('CreateTime').text
        import urllib
        urllib.urlretrieve(purl,'/mnt/sda1/data/image/%s.jpg' % fname)
        print purl
    elif type == 'location':
        locx = xml_rec.find('Location_X').text
        locy = xml_rec.find('Location_Y').text
        scale = xml_rec.find('Scale').text
        location = xml_rec.find('Label').text
        wjdu="%s,%s" % (locx,locy)
        data = api.location(wjdu)
        datadict["msg"]=data
    else:
        content = xml_rec.find("Content").text
        data = get_replytext(content)
        datadict["msg"]=data
    print datadict.get("msg")
    return datadict

def get_replytext(content):
    content = content.strip()
    print 'enter content :',content
    cvalue = cachedb.get(content)
    cvalue =None
    if cvalue<>None:
        print 'get it from cache'
        data=cvalue
    else:
        if content.lower().startswith("ip"):
            content=content.replace("ip","").strip()
            data = api.ip(content)
        elif content.startswith(u"航班"):
            data=api.airline(content)
        elif content.startswith(u"火車"):
            data=api.train(content)
        elif content.startswith(u"翻譯"):
            data=api.translator(content)
        elif content.startswith(u"手機"):
            data=api.mobile(content)
        elif content.startswith(u"簡體") or content.startswith(u"繁體"):
            data=api.tradition(content)
        elif content.startswith(u"匯率"):
            data=api.huilv(content)
        else:
            data = api.weather(content)
        cachedb.set(content,data)
    return data

if __name__ == '__main__':
    path='../conf/test.yaml'
    with open(path) as f:
        x=yaml.load(f)
    textdata = x.get('textdata')
    wxlink = x.get('wxlink')
    r=requests.get(wxlink)
    print r.text
    r=requests.post(wxlink,textdata)
    print r.text

 

這裏實現了查詢航班，火車，匯率，中英文翻譯，簡繁體轉換，查詢當前IP，手機所在地的功能

代碼放在github上
https://github.com/sui84/openwrtpytest

另外pandorbox上的python安裝文件爲了能夠運行有些改動，放在這裏

https://github.com/sui84/PandorboxPython27