每日一報這種東西，上有政策，下就一定有對策。比如我就寫了個python程序實現了自動登錄填表，由於眾所周知的原因，這里略去具體機構和網頁，只分享代碼。
首先需要安裝selenium 依賴，並且還需要下載一個webdriver，我使用的是chrome的webdriver。
https://chromedriver.chromium.org/downloads
直接上代碼：
1 from selenium import webdriver 2 import time 3 4 from selenium.common.exceptions import NoSuchElementException 5 6 driver = webdriver.Chrome('./chromedriver') 7 driver.get("http://XXXXXXX.XXXX.XXX.cn") 8 9 account = driver.find_element_by_id("username") 10 account.send_keys("1XXXXXXX") 11 12 pwd = driver.find_element_by_id("password") 13 pwd.send_keys("0XXXXXXXXX") 14 15 login = driver.find_element_by_id("login-submit") 16 login.click() 17 time.sleep(3) 18 try: 19 messageNotification = driver.find_element_by_id("layui-layer1") 20 except NoSuchElementException: 21 print ("No new messages") 22 else: 23 confirm = driver.find_element_by_class_name("layui-layer-btn0") 24 confirm.click() 25 try: 26 while True: 27 driver.find_element_by_css_selector('[style="color:red;"]').find_element_by_xpath('..').click() 28 rtn = driver.find_element_by_css_selector('[role="button"]') 29 rtn.click() 30 except NoSuchElementException: 31 print ("No unread message found!") 32 33 34 try: 35 while True: 36 x = driver.find_element_by_id("fineui_1") 37 x.click() 38 reportHis = driver.find_element_by_id("lnkReportHistory") 39 reportHis.click() 40 41 toWrite = driver.find_element_by_css_selector('[href^="/DayReport.aspx"]') 42 toWrite.click() 43 checkBox = driver.find_element_by_id("p1_ChengNuo-inputEl-icon") 44 checkBox.click() 45 temperature = driver.find_element_by_id("p1_TiWen-inputEl") 46 temperature.send_keys("36") 47 submit = driver.find_element_by_id("p1_ctl00_btnSubmit") 48 submit.click() 49 subConf = driver.find_element_by_id("fineui_68") 50 subConf.click() 51 time.sleep(3) 52 subConfConf = driver.find_element_by_id("fineui_73") 53 subConfConf.click() 54 except NoSuchElementException: 55 print("All reported. Exiting...") 56 57 driver.close()
先大體解釋一下，9-17行進行登錄操作，18-31行檢查消息中心的未讀消息並全部自動讀取，34-55行進入每日一報，自動填寫所有未填的表單。
技術上值得注意的一些地方：
- 有時，代碼邏輯沒有問題，但卻出現類似 stale element reference: element is not attached to the page document 這樣的錯誤，也就是webdriver找不到我們指定的元素，很有可能是因為網頁還沒完全加載，程序就對其進行操作。使用time.sleep() 讓程序等待一下網頁，一般就能解決。
- 無論是find_element_by 還是find_elements_by ，如果沒有找到對應的元素，拋出一個NoSuchElementException 異常。
- 定位到父節點元素的方法：
find_element_by_xpath('..'） - 使用css selector 以屬性定位元素的方法：
driver.find_element_by_css_selector('[style="color:red;"]') - 用類似於正則的屬性通配符，對屬性值進行模糊匹配：
find_element_by_css_selector('[href^="/DayReport.aspx"]') 參考：https://www.w3.org/TR/selectors/#attribute-substrings
6.2. Substring matching attribute selectors
Three additional attribute selectors are provided for matching substrings in the value of an attribute:
- [att^=val]
- Represents an element with the
attattribute whose value begins with the prefix "val". If "val" is the empty string then the selector does not represent anything.- [att$=val]
- Represents an element with the
attattribute whose value ends with the suffix "val". If "val" is the empty string then the selector does not represent anything.- [att*=val]
- Represents an element with the
attattribute whose value contains at least one instance of the substring "val". If "val" is the empty string then the selector does not represent anything.