全系列目录：
- 【原创】shadowebdict开发日记：基于linux的简明英汉字典（一）
- 【原创】shadowebdict开发日记：基于linux的简明英汉字典（二）
- 【原创】shadowebdict开发日记：基于linux的简明英汉字典（三）
- 【原创】shadowebdict开发日记：基于linux的简明英汉字典（四）
- 项目的github地址
承接上文。
现在来进行response模块的开发。
这一模块所完成的任务是，如果本地的词库中没有用户需要查询的词汇，那么就去网络上寻找到相应的词条作为结果返回，并存入本地数据库。
我选择的网上的源是iciba，理由很简单，不需要复杂的cookie管理，所查词汇的内容基本集成在返回的html源文件中。
值得注意的是，如果请求过于频繁，那么会被iciba ban掉，所以如果要利用这段代码爬iciba的词库，请自行加个sleep。不过好像我代码中也有，注意改下便是。
该模块的逻辑为：
0、提供一个接口给其他模块调用，输入为待查词汇。
1、构造url请求，获得返回的数据。
2、根据数据的格式，解析返回的数据并获取相应词条的内容
3、按照约定的格式返回相应词条的内容给调用其的其他模块
具体的做法参考源代码
# -*- coding:utf-8 -*-
__author__ = 'wmydx' import urllib
import re
import urllib2
import time class GetResponse: def __init__(self):
self.url = 'http://www.iciba.com/'
self.isEng = re.compile(r'(([a-zA-Z]*)(\s*))*$')
self.group_pos = re.compile(r'<div class="group_pos">(.*?)</div>', re.DOTALL)
self.net_paraphrase = re.compile(r'<div class="net_paraphrase">(.*?)</div>', re.DOTALL)
self.sentence = re.compile(r'<dl class="vDef_list">(.*?)</dl>', re.DOTALL) def process_input(self, word):
word = word.strip()
word = word.replace(' ', '_')
return word def get_data_from_web(self, word):
headers = {'Referer': 'http://www.iciba.com/', 'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) \
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.72 Safari/537.36'}
request = urllib2.Request(self.url + word, headers=headers)
while True:
try:
f = urllib2.urlopen(request).read()
break
except:
pass
return f def get_eng_from_chinese(self, word):
word = self.process_input(word)
word = urllib.quote(word)
data = self.get_data_from_web(word)
label_lst = re.compile(r'<span class="label_list">(.*?)</span>', re.DOTALL)
label_itm = re.compile(r'<label>(?P<item>.*?)</a>(.*?)</label>', re.DOTALL)
first = label_lst.search(data)
data = data[first.start():first.end()]
start_itm = 0
res = []
while 1:
second = label_itm.search(data, start_itm)
if not second:
break
word = self.get_sentence_from_dt(data[second.start('item'):second.end('item')])
res.append(word)
start_itm = second.end()
return res def get_dict_data(self, word):
englst = []
res = []
match = self.isEng.match(word)
if not match:
englst = self.get_eng_from_chinese(word)
else:
englst.append(word)
for item in englst:
word = self.process_input(item)
data = self.get_data_from_web(word)
if data.find('对不起，没有找到') != -1:
res.append(-1)
else:
tmp_dict = self.analysis_eng_data(data)
tmp_dict['word'] = word
tmp_dict['times'] = 1
res.append(tmp_dict)
return res def analysis_eng_data(self, data):
res = {}
explain = self.group_pos.search(data)
if explain:
explain = data[explain.start():explain.end()]
res['explain'] = self.generate_explain(explain)
else:
res['explain'] = -1
net_explain = self.net_paraphrase.search(data)
if net_explain:
net_explain = data[net_explain.start():net_explain.end()]
res['net_explain'] = self.generate_net_explain(net_explain)
else:
res['net_explain'] = -1
sentence_start = 0
sentence_end = len(data)
sentence_lst = []
while sentence_start < sentence_end:
sentence = self.sentence.search(data, sentence_start)
if sentence:
sentence_str = data[sentence.start():sentence.end()]
else:
break
sentence_lst.append(self.generate_sentence(sentence_str))
sentence_start = sentence.end()
res['sentence'] = "\n\n".join(sentence_lst)
return res def generate_explain(self, target):
start_word = 0
end_word = len(target)
meta_word = re.compile(r'<strong class="fl">(?P<meta_word>.*?)</strong>', re.DOTALL)
label_lst = re.compile(r'<span class="label_list">(.*?)</span>', re.DOTALL)
label_itm = re.compile(r'<label>(?P<item>.*?)</label>', re.DOTALL)
res = ''
while start_word < end_word:
first = meta_word.search(target, start_word)
if first:
word_type = target[first.start('meta_word'):first.end('meta_word')]
else:
break
res += word_type + ' '
second = label_lst.search(target, first.end('meta_word'))
start_label = second.start()
end_label = second.end()
while start_label < end_label:
third = label_itm.search(target, start_label)
if third:
res += target[third.start('item'):third.end('item')]
start_label = third.end()
else:
break
res += '\n'
start_word = end_label
return res def generate_net_explain(self, target):
start_itm = 0
end_itm = len(target)
li_item = re.compile(r'<li>(?P<item>.*?)</li>', re.DOTALL)
res = '网络释义： '
while 1:
first = li_item.search(target, start_itm)
if first:
res += target[first.start('item'):first.end('item')]
else:
break
start_itm = first.end()
return res def generate_sentence(self, target):
res = ''
english = re.compile(r'<dt>(?P<eng>.*?)</dt>', re.DOTALL)
chinese = re.compile(r'<dd>(?P<chn>.*?)</dd>', re.DOTALL)
first = english.search(target)
second = chinese.search(target)
res += self.get_sentence_from_dt(target[first.start('eng'):first.end('eng')]) + '\n'
res += target[second.start('chn'):second.end('chn')]
return res def get_sentence_from_dt(self, target):
res = ''
length = len(target)
index = 0
while index < length:
if target[index] == '<':
while target[index] != '>':
index += 1
else:
res += target[index]
index += 1
return res if __name__ == '__main__':
p = GetResponse()
test = ['hello', 'computer', 'nothing', 'bad guy', 'someday']
for item in test:
res = p.get_dict_data(item)
for key in res:
for (k, v) in key.items():
print "dict[%s]=" % k, v
time.sleep(3)