''' 本模块用于获取作业的参数,包括: 1、关卡数 2、每关的参数 a:任务描述 b:编程要求 c:编辑器中的所有代码 3、课程id,实训id 4、写入本地json文件中 ''' #导入所需模块 import platform import os import json import time from selenium.webdriver import Chrome from selenium.webdriver.chrome.options import Options from selenium.webdriver.common.by import By from selenium.webdriver.common.keys import Keys import re from lxml import etree import time import requests from cloud import is_exist,download global retry retry = 0 #配置参数 opt = Options() opt.add_experimental_option('detach', True) opt.add_argument('--headless') platf = platform.platform() def is_practice(url:str) -> bool: obj=re.compile(r'www.educoder.net/tasks') if obj.search(url): return True else: return False def is_programming(url:str) -> bool: obj=re.compile(r'www.educoder.net/myproblems') if obj.search(url): return True else: return False # 另外,目前好像只有实训作业有这些参数,其他的作业例如编程作业就没有,所以先判断一下是否为实训作业,可以通过用户输入的url判断 # 主要是看educoder.net/后面是否有tasks,如果有,则是实训作业,否则,不是实训作业 #为方便main.py调用,将判断函数写入函数中,以下部分封装为函数 def get_parameters(url: str, user_name: str, password: str): ''' 用于获得实训作业的参数 url:实训网址 user_name:用户名 password:密码 ''' url = url user_name = user_name password = password if is_practice(url): #构造selenium对象 safari = Chrome(options=opt) safari.get(url) #模拟登录 safari.implicitly_wait(10) safari.find_element(By.ID, 'login').send_keys(user_name) safari.find_element(By.ID, 'password').send_keys(password) safari.find_element(By.ID, 'password').send_keys(Keys.ENTER) time.sleep(2) #判断是否登录成功 try: safari.find_element(By.XPATH, '//*[@id="task-left-panel"]/div[1]/a[1]') except BaseException: print('登录失败 请检查输入信息是否正确') # 关闭浏览器 safari.quit() # #重新调用login_ui.py # if 'Windows' in platf: # os.system('python login_ui.py') # else: # os.system('python3 login_ui.py') #获取cookie,User-Agent Cookie = safari.get_cookies() User_Agent = safari.execute_script('return navigator.userAgent') cookie = f'autologin_trustie={Cookie[1]["value"]}; _educoder_session={Cookie[0]["value"]}' #先获取到shixun_id便于先判断云端文件是否存在 cur_url = url identity = cur_url.split('/')[-1].split('?')[0] id_url = f'https://data.educoder.net/api/tasks/{identity}.json?' headers = { 'Cookie': cookie, 'User-Agent': User_Agent, 'Referer': cur_url } response = requests.get(url=id_url, headers=headers) shixun_id = dict(response.json())['challenge']['shixun_id'] language = requests.get(f'https://data.educoder.net/api/tasks/{identity}/rep_content.json',headers=headers).json()['content']['language'] #判断云端文件是否存在 exist = is_exist(f'{shixun_id}_{language}.json') if exist: try: print('云端文件已存在,正在下载') download(f'{shixun_id}.json') # 检测本地文件是否下载完成 while True: try: if os.path.exists(f'{shixun_id}_{language}.json'): print('下载完成') safari.quit() return break except Exception as e: print(e) except Exception as e: print(e) else: #不存在,则继续执行本程序 print('云端文件不存在,正在爬取') #获取关卡数 #点击展开关卡页面 time.sleep(3) safari.find_element( By.XPATH, '//*[@id="task-left-panel"]/div[1]/a[1]').click() #关卡数量由 class = "flex-container challenge-title space-between" 的元素数量决定 time.sleep(3) htmltxt = safari.page_source html = etree.HTML(htmltxt) task_num = html.xpath( 'count(//*[@class="flex-container challenge-title space-between"])' ) task_num = int(task_num) print(f'关卡数量为{task_num}') #回到第一关 time.sleep(3) safari.find_element( By.XPATH, '//*[@id="task-left-panel"]/div[3]/div[3]/div/div/div/div/div[1]/div[1]/a' ).click() #对于每一关,获取参数 #每一关的参数由以下元素组成: ''' /html/body/div[1]/div/div/div/div[2]/section[1]/div[3]/div[3]/div/div/div/div/div[3]/div[1]/a /html/body/div[1]/div/div/div/div[2]/section[1]/div[3]/div[3]/div/div/div/div/div[4]/div[1]/a ''' obj1 = re.compile( r'

任务描述

(?P.*?)

', re.S) obj2 = re.compile( r'

编程要求

(?P.*?)

', re.S) #初始化一个字典,用于存放所有关卡的参数 total = {} i = 1 try: while i <= task_num: cur_url = Referer = safari.current_url identity = cur_url.split('/')[-1].split('?')[0] id_url = f'https://data.educoder.net/api/tasks/{identity}.json?' #获取课程id headers = { 'Cookie': cookie, 'User-Agent': User_Agent, 'Referer': Referer } try: response = requests.get(url=id_url, headers=headers) challenge_id = dict(response.json())['challenge']['id'] shixun_id = dict(response.json())['challenge']['shixun_id'] except BaseException: print('获取课程id失败') #获取任务描述(如果存在的话) time.sleep(3) page_source = safari.page_source describe = obj1.findall(page_source) #获取编程要求(如果存在的话) require = obj2.findall(page_source) #获取编辑器中的代码,采用requests抓取https://data.educoder.net/api/tasks/{identity}/rep_content.json中的content中的content # 然后然后,这个content是一个base64编码的字符串,需要解码 code = requests.get( f'https://data.educoder.net/api/tasks/{identity}/rep_content.json', headers=headers).json()['content']['content'] #把参数存入字典,再转换为json格式 task = { 'describe': describe[0] if len(describe) != 0 else '', 'require': require[0] if len(require) != 0 else '', 'code': code, 'verified': False, #这个参数是用来标记答案是否被用户认证为正确答案的,初始值为False 'last_modified': time.strftime( '%Y-%m-%d %H:%M:%S', time.localtime( time.time())), #这个参数是用来标记答案最后一次被修改的时间,初始值为当前时间 'language': language if language != None else '' } #把每一关的参数存入总的字典中 total[challenge_id] = task #去往下一关 safari.implicitly_wait(10) if i == 1: i += 1 safari.find_element(By.XPATH,f'//*[@id="task-right-panel"]/div[4]/div/div[2]/a').click() elif i < task_num: i += 1 safari.find_element(By.XPATH,f'//*[@id="task-right-panel"]/div[4]/div/div[2]/a[2]').click() else: i += 1 except Exception as e: print(e) print(f'{i}关参数获取参数失败') #判断爬取到的代码是否存在空值或者键的数量是否与关卡数量相等,如果不相等,则说明爬取失败,需要重新爬取 # if len(total) != task_num: # print('参数爬取失败,正在重新爬取') # get_parameters(url,user_name,password) # else: # for i,j in total.items(): # if j['code'] == '': # print('参数爬取失败,正在重新爬取') # get_parameters(url,user_name,password) #把参数写入本地json文件中,文件名字与shixun_name相同键为course_id,值为一个列表,列表中每个元素为一个字典,字典中包含每一关的参数 with open(f'{shixun_id}_{language}.json', 'w', encoding='utf-8') as f: json.dump(total, f, ensure_ascii=False, indent=4) print('参数爬取完成') #关闭浏览器 safari.quit() else: print('这不是一个实训作业') return def get_parameters_of_programming(url:str,user_name:str,password:str): ''' 用于获得编程作业的参数 url:实训网址 user_name:用户名 password:密码 ''' url = url user_name = user_name password = password # 检查是否为编程作业 if is_programming(url): # 构造selenium对象 #构造selenium对象 safari = Chrome(options=opt) safari.get(url) #模拟登录 safari.implicitly_wait(10) safari.find_element(By.ID, 'login').send_keys(user_name) safari.find_element(By.ID, 'password').send_keys(password) safari.find_element(By.ID, 'password').send_keys(Keys.ENTER) time.sleep(2) #判断是否登录成功 try: safari.find_element(By.XPATH,'//*[@id="root"]/div/div/div/div/div/div/div/section[1]/div/div[4]') except BaseException: print('登录失败 请检查输入信息是否正确') # 关闭浏览器 safari.quit() # #重新调用login_ui.py # if 'Windows' in platf: # os.system('python login_ui.py') # else: # os.system('python3 login_ui.py') #获取cookie,User-Agent Cookie = safari.get_cookies() User_Agent = safari.execute_script('return navigator.userAgent') cookie = f'autologin_trustie={Cookie[1]["value"]}; _educoder_session={Cookie[0]["value"]}' heders = { 'Cookie':cookie, 'User-Agent':User_Agent, 'Referer':url } # 由于编程作业往往是题库的题目组合的,没有直接编程作业的总ID,所以要先访问每个题目界面,获得相应的ID,题干,代码等参数 # 最终上传时,记得在要区别于已经上传的实训作业,可以在文件名前加上'pro'前缀 # 获得题目数量 # 展开关卡页面 safari.find_element(By.XPATH,'//*[@id="root"]/div/div/div/div/div/div/div/section[1]/div/div[4]').click() #
# 可见,关卡数量是根据class="list___PXTsq "的元素数量决定的,直接用xpath获取即可 time.sleep(1) htmltxt = safari.page_source html = etree.HTML(htmltxt) task_num = html.xpath('count(//*[@class="list___PXTsq "])') task_num = int(task_num) + 1 # 回到第一关 # //*[@id="educoder"]/body/div[6]/div/div[3]/div/div/div[2]/div[1] # //*[@id="educoder"]/body/div[7]/div/div[3]/div/div/div[2]/div[2] for i in range(1,10): try: if safari.find_element(By.XPATH,f'//*[@id="educoder"]/body/div[{i}]/div/div[3]/div/div/div[2]/div[1]'): safari.find_element(By.XPATH,f'//*[@id="educoder"]/body/div[{i}]/div/div[3]/div/div/div[2]/div[1]').click() break except: continue i = 1 while i<=task_num: # 对于每一关,获取参数 cur_url = safari.current_url identity = cur_url.split('/')[-1].split('?')[0] resp = requests.get(f'https://data.educoder.net/api/myproblems/{identity}.json',headers=heders) # 提取resp中的题目id,题干,代码等参数 problem_data = resp.json() # 初始化一个字典,用于存放所有关卡的参数 total = {} # 题目id pro_id = problem_data['hack']['id'] language = problem_data['hack']['language'] # 获取id后,判断云端是否存在该文件,如果存在,则跳过,如果不存在,则继续执行本程序 exist = is_exist(f'pro_{pro_id}_{language}.json') if exist: print('云端文件已存在,正在下载') download(f'pro_{pro_id}_{language}.json') print(f'pro_{pro_id}_{language}.json下载完成') continue else: print('云端文件不存在,正在爬取') # 题干 describe = problem_data['hack']['description'] # 代码(base64编码) code = problem_data['hack']['code'] total = { 'id':pro_id, 'describe':describe, 'code':code, 'verified': False, #这个参数是用来标记答案是否被用户认证为正确答案的,初始值为False(暂时没啥用) 'last_modified': time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())), #这个参数是用来标记答案最后一次被修改的时间,初始值为当前时间 'language':language if language != None else '' } # 写入本地json,命名为pro_pro_id.json with open(f'pro_{pro_id}_{language}.json','w',encoding='utf-8') as f: json.dump(total,f,ensure_ascii=False) print(f'{pro_id}完成') # 去往下一关 try: i+=1 safari.implicitly_wait(10) safari.find_element(By.ID,'oj-next').click() time.sleep(2) except BaseException: print('参数爬取完成') # 完成后,本地会有若干个pro_pro_id.json文件 safari.quit() else: print('不是编程作业') if __name__ == '__main__': url = 'https://www.educoder.net/myproblems/9kwnlzvcegsa?type=1' user_name = 'hnu202311020126' password = 'hzy123456' get_parameters_of_programming(url,user_name,password) print('结束测试')