[IDS] Add support for slider captcha (#12)

libxduauth/sites/ids.py

@@ -6,7 +6,6 @@
 
 from ..AuthSession import AuthSession
 from ..utils.page import parse_form_hidden_inputs
-from ..utils.vcode import _process_vcode
 from ..utils.aes import encrypt
 
 
@@ -24,19 +23,40 @@ def __init__(
             self.cookies.clear()
         page = self.get(
             'http://ids.xidian.edu.cn/authserver/login',
-            params={'service': target, 'type': 'userNameLogin'}
+            params={'service': target}
         ).text
-        is_need_captcha, vcode = self.get(
+        is_need_captcha = self.get(
             'https://ids.xidian.edu.cn/authserver/checkNeedCaptcha.htl',
-            params={'username': username, '_': int(time.time() * 1000)}
-        ).json()['isNeed'], None
+            params={'username': username, '_': str(int(time.time() * 1000))}
+        ).json()['isNeed']
         if is_need_captcha:
             captcha = self.get(
-                'http://ids.xidian.edu.cn/authserver/getCaptcha.htl',
-                params={str(int(time.time() * 1000)): ''}
+                'https://ids.xidian.edu.cn/authserver/common/openSliderCaptcha.htl',
+                params={'_': str(int(time.time() * 1000))}
             )
-            _process_vcode(Image.open(BytesIO(captcha.content))).show()
-            vcode = input('验证码：')
+            # 返回: {
+            #     'bigImage': ..., # 背景图(base64)
+            #     'smallImage': ..., # 滑块图(base64)
+            #     'tagWidth": 93, # 无用, 恒93
+            #     'yHeight': 0 # 无用, 恒0
+            # }
+            img = Image.open(BytesIO(captcha.json()['bigImage']))
+            img.show()
+            # move_len: 背景图左侧到滑块目标位置左侧的宽度
+            move_len = input('滑块位移:')
+            # canvasLength: canvas宽度, 硬编码280
+            # moveLength: 按比例缩放后的滑块位移, 有容错
+            verify = self.post(
+                'https://ids.xidian.edu.cn/authserver/common/verifySliderCaptcha.htl',
+                data={
+                      'canvasLength': '280',
+                      'moveLength': str(move_len * 280 // img.width)
+                }
+            )
+            # 返回: {
+            #     'errorCode': ..., # 验证通过时为1
+            #     'errorMsg': ... # 验证通过时为'success'
+            # }
         page = BeautifulSoup(page, "lxml")
         form = page.findChild(attrs={'id': 'pwdFromId'})
         params = parse_form_hidden_inputs(form)
@@ -47,7 +67,7 @@ def __init__(
             data=dict(params, **{
                 'username': username,
                 'password': encrypt(password.encode(), enc.encode()),
-                'captcha': vcode,
+                'captcha': '',
                 'rememberMe': 'true'
             })
         )

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="libxduauth",
-    version="1.7.6",
+    version="1.8.0",
     author="Frank",
     author_email="[email protected]",
     description="login utilities for XDU",