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Baidu.py
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Baidu.py
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#!/usr/bin/env python2
# -*- coding:utf-8 -*-
from Downloader import getStream
from MyParser import MyParser
from String import longestString, cutTo, cutBegin, getCodingContent
from urllib import urlencode
import json
import re
def getImageUrlFromScript(script):
pattern = re.compile(r'(?<="objURL":").*?(?=")')
groups = pattern.findall(script)
new_group = [amatch.strip() for amatch in groups] # 更Pythonic的方式
return new_group
def getImageUrlList(url):
imglist = []
for i in _getJsonList(url):
imglist.append(i['objURL'].strip())
return imglist
def _getJsonList(url):
stream = getStream(url)
data = getCodingContent(stream)
pattern = re.compile(r'(?<=var imgdata =).*?(?=;v)')
block = pattern.findall(data)[0]
jsonlist = json.loads(block)
return jsonlist['data'][:-1]
def nextPage(url, pn):
url_pn = cutBegin(url, '&pn=')
if not url_pn:
url_pn = 0
url_pn = int(url_pn) + pn
return cutTo(url, '&pn') + '&pn=' + str(url_pn)
def search(keyword, addtionParams={}):
"""Generate a search url by the given keyword.
params keyword: utf8 string"""
url = 'http://image.baidu.com/i?'
parser = MyParser()
params = _getParams('http://image.baidu.com', parser)
params.update(addtionParams)
params.update({'word':keyword.decode('utf8').encode('gbk')})
return url + urlencode(params)
def searchResult(url):
parser = MyParser()
parser.feed(getCodingContent(getStream(url)))
block = longestString(parser.scriptList)
parser.close()
pattern = re.compile('(?<="listNum":)\d*(?=,)')
count = pattern.findall(block)
if count:
count = int(count[0])
return count
return 0
def _getParams(url, parser):
"""Get a dict contained the url params"""
stream = getStream(url)
data = getCodingContent(stream)
parser.feed(data)
return parser.formParams
def _appendParams(adict):
"""Generate a url with params in adict."""
p = [key + '=' + adict[key] for key in adict]
return '&'.join(p)