1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sqlite3 # 数据库
import gc
import urllib3
import multiprocessing # 多线程模块
import threading # 多线程模块
import ssl
import re # 正则表达式
from time import time
from queue import Queue
from bs4 import BeautifulSoup
from luogu import LuoguBrowser
"""
重构洛谷用户数据爬取
多进程爬虫 + 数据库存储 + 缓存机制 + 内存优化
过程：
1.消息列队发送任务
2.爬虫列队抓取网页分析
3.保存列队保存到本地
"""
__author__ = 'himself65'
__license__ = 'MIT'
__email__ = 'himself6565@gmail.com'
# SETTINGS
DATABASE = {
'name': 'himself65',
}
Threads_Number = 10 # 默认10个爬虫列队
DEBUG = True
# END
GET_TASKS_SQL = '''SELECT ID FROM TASK;'''
def get_database():
"""获取数据库"""
name = DATABASE['name'] + '.db'
database = sqlite3.connect(name)
return database
def task_producer(a, b):
"""生成任务 区间[a, b]"""
db = get_database()
cursor = db.cursor()
for i in range(a, b + 1):
create_task_sql = '''INSERT INTO TASK(ID)
VALUES (%d);''' % (i)
cursor.executescript(create_task_sql)
db.close()
def get_task(task_que: Queue):
"""任务队列，从数据库中加载任务放到task_que中"""
db = get_database()
cursor = db.cursor()
cursor.execute(GET_TASKS_SQL)
task_list = cursor.fetchall()
if len(task_list) != 0:
for item in task_que:
time_1 = time()
task_que.put(item)
print("加载任务耗时: %lf" % (time() - time_1))
else:
print("没有找到任务")
db.close()
def save_task(save_que: Queue):
"""存储队列 TODO"""
db = get_database()
cursor = db.cursor()
while not save_que.empty():
item = save_que.get(timeout=5)
uid = item['uid']
name = item['name']
sub_num = item['submit_num']
ac_num = item['ac_num']
contribute = itme['contribute']
active = item['active']
integral = item['integral']
created_time = item['created_time']
save_user_sql = '''INSERT INTO USER(ID,
NAME,
SUBMIT_NUM,
AC_NUM,
CONTRIBUTE,
ACTIVE,
INTEGRAL,
CREATED_TIME)
VALUES(%d %s %d %d %d %d %d %s);
DELETE FROM TASK WHERE ID = %d;''' % (uid, name,
sub_num,
ac_num,
contribute,
active,
integral,
created_time,
uid)
# Save
cursor.execute(save_user_sql)
save_que.task_done()
def crawler(task_que: Queue, save_que: Queue):
"""爬虫部分"""
import urllib
import time
user_url = "https://www.luogu.org/space/show?uid="
def get_url(user_id):
"""得到用户的url"""
return '%s%s' % (user_url, user_id)
while not task_que.empty():
user_id = task_que.get(block=True)
url = get_url(user_id)
start_time = time.time()
html = urllib.request.urlopen(url)
soup = BeautifulSoup(html, 'html.parser')
if DEBUG:
print('用户:%d 用时%lf' % (user_id, time.time() - start_time))
if re.match('提示', soup.title.string) is not None:
# 判断用户是否存在
print('不存在用户', user_id)
continue
"""
公开代码者有 5 个ul
1. avatar
2. ac_num submit_num
3. contribute active integral
4. utype
5. created_time
隐私保护者有 4 个ul
1. avatar
2. contribute active integral
3. utype
4. created_time
"""
# 找到信息板块
board = soup.find('ul',
{'class': 'am-list am-list-static lg-summary-list'})
board_items = board.find_all("li")
# start
user_name = soup.find('span', {'name': 'username'}).get_text()
if len(board_items) == 7:
"""公开代码用户"""
# 1
allPost = board_items[1].find_all('span',
{'class': 'lg-bignum-num'})
submit_num = allPost[0].get_text()
ac_num = allPost[1].get_text()
# 2
acts = board_items[4].find('span', {
'class': 'lg-right'
}).get_text()
acts = acts.split('/')
contribute = acts[0]
active = acts[1]
integral = acts[2]
# 3
utype = board_items[5].find('span', {
'class': 'lg-right'
}).get_text()
# 4
created_time = board_items[6].find('span', {
'class': 'lg-right'
}).get_text()
luogu_user = {
'uid': user_id,
'name': user_name,
'submit_num': submit_num,
'ac_num': ac_num,
'contribute': contribute,
'active': active,
'integral': integral,
'created_time': created_time,
}
else:
"""隐私代码用户"""
acts = board_items[1].find('span', {
'class': 'lg-right'
}).get_text()
acts = acts.split('/')
contribute = acts[0]
active = acts[1]
integral = acts[2]
created_time = board_items[3].find('span', {
'class': 'lg-right'
}).get_text()
luogu_user = {
'uid': user_id,
'name': user_name,
'submit_num': -1,
'ac_num': -1,
'contribute': contribute,
'active': active,
'integral': integral,
'created_time': created_time,
}
if DEBUG:
print(luogu_user)
# Finished
save_que.put(luogu_user)
task_que.task_done()
def init():
db = get_database()
cursor = db.cursor()
# 创建表
create_table_sql = '''CREATE TABLE IF NOT EXISTS USER(
ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
SUBMIT_NUM INT,
AC_NUM INT,
CONTRIBUTE INT,
ACTIVE INT,
INTEGRAL INT,
CREATED_TIME TEXT
);'''
cursor.executescript(create_table_sql)
create_table_sql = '''CREATE TABLE IF NOT EXISTS TASK(
ID INT PRIMARY KEY NOT NULL
);'''
cursor.execute(create_table_sql)
# 此处不用execute则无法获取，暂且不知道原因
cursor.execute(GET_TASKS_SQL)
exist_task = cursor.fetchone()
if exist_task is None:
print("no task exist!")
exit()
# Close DataBase
db.close()
def test(tq: Queue, sq: Queue):
"""Unit Test Part"""
init()
def main(tq: Queue, sq: Queue):
# Create Theads
for td_id in range(1, Threads_Number + 1):
td = threading.Thread(target=crawler, args=(tq, sq), name=str(td_id))
threads_list.append(td)
for td in threads_list.index():
td.start()
save_td = threading.Thread(target=save_task, args=(sq), name='Save_Que')
save_td.start()
save_td.join()
print('Finished')
if __name__:
# MARK -- 参考答案：https://stackoverflow.com/questions/27835619/urllib-and-ssl-certificate-verify-failed-error
ssl._create_default_https_context = ssl._create_unverified_context
# 任务列表
task_que = Queue()
save_que = Queue()
main(task_que, save_que)