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main.py
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import json
import os
import re
from urllib.parse import quote
import requests
class LCSpider:
graph_url = 'https://leetcode-cn.com/graphql'
user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) ' \
'Chrome/77.0.3865.120 Safari/537.36'
def __init__(self):
self.session = requests.session()
# mapper
self.number_mapper = [str(i * 100).zfill(4) + '-' + str(i * 100 + 99).zfill(4) for i in range(100)]
self.difficulty_mapper = dict(Easy='简单', Medium='中等', Hard='困难')
# result
self.result = []
self.md_table_cn = []
self.md_table_en = []
def get_question_detail(self, question_title_slug):
"""fetch question detail by leetcode's api"""
form_data = {
'operationName': 'globalData',
'query': 'query globalData {\n feature {\n questionTranslation\n subscription\n signUp\n '
'discuss\n mockInterview\n contest\n store\n book\n chinaProblemDiscuss\n '
'socialProviders\n studentFooter\n cnJobs\n enableLsp\n enableWs\n '
'enableDebugger\n enableDebuggerAdmin\n enableDarkMode\n tasks\n '
'leetbook\n __typename\n }\n userStatus {\n isSignedIn\n isAdmin\n '
'isStaff\n isSuperuser\n isTranslator\n isPremium\n isVerified\n '
'isPhoneVerified\n isWechatVerified\n checkedInToday\n username\n '
'realName\n userSlug\n groups\n avatar\n optedIn\n '
'requestRegion\n region\n activeSessionId\n permissions\n notificationStatus {\n '
'lastModified\n numUnread\n __typename\n }\n completedFeatureGuides\n '
'useTranslation\n accountStatus {\n isFrozen\n inactiveAfter\n __typename\n '
'}\n __typename\n }\n siteRegion\n chinaHost\n websocketUrl\n userBannedInfo {\n '
'bannedData {\n endAt\n bannedType\n __typename\n }\n __typename\n }\n}\n',
'variables': {}
}
headers = {
'User-Agent': LCSpider.user_agent,
'Connection': 'keep-alive',
'Content-Type': 'application/json',
'Referer': 'https://leetcode-cn.com/problems/' + question_title_slug
}
self.session.post(LCSpider.graph_url, data=json.dumps(form_data), headers=headers, timeout=10)
form_data = {
'operationName': 'questionData',
'variables': {
'titleSlug': question_title_slug
},
'query': """query questionData($titleSlug: String!) {\n question(titleSlug: $titleSlug) {\n
questionId\n questionFrontendId\n boundTopicId\n title\n titleSlug\n content\n
translatedTitle\n translatedContent\n isPaidOnly\n difficulty\n likes\n dislikes\n
isLiked\n similarQuestions\n contributors {\n username\n profileUrl\n
avatarUrl\n __typename\n }\n langToValidPlayground\n topicTags {\n name\n
slug\n translatedName\n __typename\n }\n companyTagStats\n codeSnippets {\n
lang\n langSlug\n code\n __typename\n }\n stats\n hints\n solution {\n
id\n canSeeDetail\n __typename\n }\n status\n sampleTestCase\n metaData\n
judgerAvailable\n judgeType\n mysqlSchemas\n enableRunCode\n envInfo\n book {\n
id\n bookName\n pressName\n source\n shortDescription\n fullDescription\n
bookImgUrl\n pressImgUrl\n productUrl\n __typename\n }\n isSubscribed\n
isDailyQuestion\n dailyRecordStatus\n editorType\n ugcQuestionId\n style\n
__typename\n }\n}\n"""
}
# get question detail
resp = self.session.post(url=LCSpider.graph_url, data=json.dumps(form_data).encode('utf-8'), headers=headers,
timeout=10)
res = resp.json()
return res['data']['question']
def get_all_questions(self):
"""fetch all question by leetcode's api"""
headers = {
'accept': 'application/json, text/javascript, */*; q=0.01',
'content-type': 'application/json',
'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/77.0.3865.120 Safari/537.36',
'x-requested-with': 'XMLHttpRequest'
}
resp = self.session.get(url='https://leetcode.com/api/problems/all/', headers=headers, allow_redirects=False)
questions = resp.json()['stat_status_pairs']
for question in questions:
frontend_question_id = str(question['stat']['frontend_question_id']).zfill(4)
question_id = str(question['stat']['question_id']).zfill(4)
no = int(frontend_question_id) // 100
paid_only = question['paid_only']
question_title_en = question['stat']['question__title']
question_title_en = re.sub(r'[\\/:*?"<>|]', '', question_title_en).strip()
question_title_slug = question['stat']['question__title_slug']
url_cn = 'https://leetcode-cn.com/problems/' + question_title_slug
url_en = 'https://leetcode.com/problems/' + question_title_slug
path_cn = '/solution/{}/{}.{}/README.md'.format(self.number_mapper[no], frontend_question_id,
quote(question_title_en))
path_en = '/solution/{}/{}.{}/README_EN.md'.format(self.number_mapper[no], frontend_question_id,
quote(question_title_en))
print(frontend_question_id)
item = {
'question_id': question_id,
'frontend_question_id': frontend_question_id,
'paid_only': paid_only,
'paid_only_cn': '',
'url_cn': url_cn,
'url_en': url_en,
'relative_path_cn': path_cn,
'relative_path_en': path_en,
'title_cn': '',
'title_en': question_title_en,
'question_title_slug': question_title_slug,
'content_en': '',
'content_cn': '',
'tags_en': [],
'tags_cn': [],
'difficulty_en': '',
'difficulty_cn': '',
'code_snippets': []
}
question_detail = self.get_question_detail(question_title_slug)
if question_detail is not None:
topic_tags = question_detail.get('topicTags')
tags_cn = [e['translatedName'] for e in topic_tags if e['translatedName']]
tags_en = [e['name'] for e in topic_tags if e['name']]
item['title_cn'] = question_detail.get('translatedTitle')
item['content_en'] = question_detail.get('content')
item['content_cn'] = question_detail.get('translatedContent')
item['tags_en'] = tags_en
item['tags_cn'] = tags_cn
item['difficulty_en'] = question_detail.get('difficulty')
item['difficulty_cn'] = self.difficulty_mapper.get(question_detail.get('difficulty'))
item['code_snippets'] = question_detail.get('codeSnippets')
item['paid_only_cn'] = question_detail.get('isPaidOnly')
if not item['content_en'] or not item['content_cn']:
continue
self.result.append(item)
col1_cn = f'[{frontend_question_id}]({url_cn})'
col2_cn = f'[{item["title_cn"]}]({path_cn})'
col3_cn = ','.join([f'`{tag}`' for tag in item['tags_cn']])
col3_cn = '' if (col3_cn == 'None' or not col3_cn) else col3_cn
col4_cn = item['difficulty_cn']
col5_cn = '🔒' if item['paid_only_cn'] else ''
col1_en = f'[{frontend_question_id}]({url_en})'
col2_en = f'[{item["title_en"]}]({path_en})'
col3_en = ','.join([f'`{tag}`' for tag in item['tags_en']])
col3_en = '' if (col3_en == 'None' or not col3_en) else col3_en
col4_en = item['difficulty_en']
col5_en = '🔒' if paid_only else ''
self.md_table_cn.append((col1_cn, col2_cn, col3_cn, col4_cn, col5_cn))
self.md_table_en.append((col1_en, col2_en, col3_en, col4_en, col5_en))
def save_result(self):
with open('result.json', 'a', encoding='utf-8') as f:
f.write(json.dumps(self.result))
def generate_readme(self):
"""generate README.md and README_EN.md files"""
items = []
table_cn = "\n| 题号 | 题解 | 标签 | 难度 | 备注 |\n| --- | --- | --- | --- | --- |"
for item in sorted(self.md_table_cn, key=lambda x: x[0]):
items.append("\n| {} | {} | {} | {} | {} |".format(item[0], item[1], item[2], item[3], item[4]))
table_cn += "".join(items)
with open('./readme_template.md', 'r', encoding='utf-8') as f:
readme_cn = f.read()
with open('./README.md', 'w', encoding='utf-8') as f:
f.write(readme_cn.format(table_cn))
items = []
table_en = "\n| # | Solution | Tags | Difficulty | Remark |\n| --- | --- | --- | --- | --- |"
for item in sorted(self.md_table_en, key=lambda x: x[0]):
items.append("\n| {} | {} | {} | {} | {} |".format(item[0], item[1], item[2], item[3], item[4]))
table_en += "".join(items)
with open('./readme_template_en.md', 'r', encoding='utf-8') as f:
readme_en = f.read()
with open('./README_EN.md', 'w', encoding='utf-8') as f:
f.write(readme_en.format(table_en))
def generate_question_readme(self):
with open('./problem_readme_template.md', 'r', encoding='utf-8') as f:
readme_cn = f.read()
with open('./problem_readme_template_en.md', 'r', encoding='utf-8') as f:
readme_en = f.read()
with open('./result.json', 'r', encoding='utf-8') as f:
result = f.read()
result = json.loads(result)
for item in result:
no = int(item['frontend_question_id']) // 100
path = f'./{self.number_mapper[no]}/{item["frontend_question_id"]}.{item["title_en"]}'
path = path.replace(":", " ")
if os.path.isdir(path):
continue
os.makedirs(path)
# generate readme cn
with open(f'{path}/README.md', 'w', encoding='utf-8') as f1:
f1.write(readme_cn.format(int(item['frontend_question_id']),
item["title_cn"],
item['url_cn'],
item['relative_path_en'],
item['content_cn']))
# generate readme en
with open(f'{path}/README_EN.md', 'w', encoding='utf-8') as f2:
f2.write(readme_en.format(int(item['frontend_question_id']),
item["title_en"],
item['url_en'],
item['relative_path_cn'],
item['content_en']))
@staticmethod
def generate_summary():
summary_cn = ""
summary_en = ""
for file in os.listdir("./"):
if os.path.isdir("./" + file) and file != '__pycache__':
summary_cn += ("\n- " + file + "\n")
summary_en += ("\n- " + file + "\n")
for sub in os.listdir("./" + file):
enc = quote(sub)
summary_cn += f'\t- [{sub}](/solution/{file}/{enc}/README.md)\n'
summary_en += f'\t- [{sub}](/solution/{file}/{enc}/README_EN.md)\n'
with open('./summary.md', 'w', encoding='utf-8') as f:
f.write(summary_cn)
with open('./summary_en.md', 'w', encoding='utf-8') as f:
f.write(summary_en)
if __name__ == '__main__':
spider = LCSpider()
spider.get_all_questions()
spider.save_result()
spider.generate_readme()
spider.generate_question_readme()
spider.generate_summary()