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问答 切换 context 报错，有么有解决方法。

彭帅 · 2018年09月10日 · 最后由 mackle 回复于 2020年11月20日 · 2746 次阅读 
contexts = driver.contexts
print(contexts[0])
print(contexts[1])
driver.switch_to.context(contexts[1])
now = driver.current_context
print(now)

报错信息：

Traceback (most recent call last):
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\__main__.py", line 211, in <module>
    singlesession=args.single_session)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\__main__.py", line 205, in main
    debug_main(addr, name, kind, *extra, **kwargs)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_local.py", line 30, in debug_main
    run_file(address, name, *extra, **kwargs)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_local.py", line 64, in run_file
    run(argv, addr, **kwargs)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_local.py", line 125, in _run
    _pydevd.main()
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_vendored\pydevd\pydevd.py", line 1752, in main
    globals = debugger.run(setup['file'], None, None, is_module)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_vendored\pydevd\pydevd.py", line 1099, in run
    return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_vendored\pydevd\pydevd.py", line 1106, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "c:\Users\Penn\.vscode\extensions\ms-python.python-2018.8.0\pythonFiles\experimental\ptvsd\ptvsd\_vendored\pydevd\_pydev_imps\_pydev_execfile.py", line 25, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "c:\Program Files\ETC\ETC_UI\ETC.py", line 53, in <module>
    driver.switch_to.context(contexts[1])
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\site-packages\appium\webdriver\switch_to.py", line 31, in context
    self._driver.execute(MobileCommand.SWITCH_TO_CONTEXT, {'name': context_name})
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 312, in execute
    response = self.command_executor.execute(driver_command, params)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 472, in execute
    return self._request(command_info[0], url, body=data)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 534, in _request
    resp = opener.open(request, timeout=self._timeout)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\urllib\request.py", line 526, in open
    response = self._open(req, data)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\urllib\request.py", line 544, in _open
    '_open', req)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\urllib\request.py", line 504, in _call_chain
    result = func(*args)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\urllib\request.py", line 1346, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\urllib\request.py", line 1321, in do_open
    r = h.getresponse()
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 1331, in getresponse
    response.begin()
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 297, in begin
    version, status, reason = self._read_status()
  File "C:\Users\Penn\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 266, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response
Press any key to continue . . .

Appium:

[HTTP] --> POST /wd/hub/session/8c961ae2-8333-4e71-bc0c-795dda358356/context
[HTTP] {"name":"WEBVIEW_unknown","sessionId":"8c961ae2-8333-4e71-bc0c-795dda358356"}
[debug] [W3C] Calling AppiumDriver.setContext() with args: ["WEBVIEW_unknown","8c961ae2-8333-4e71-bc0c-795dda358356"]
[debug] [AndroidDriver] Getting a list of available webviews
[debug] [ADB] Running 'C:\Program Files\android-sdk\sdk\platform-tools\adb.exe -P 5037 -s TCJRYLG6INQSKRP7 shell cat /proc/net/unix'
[debug] [AndroidDriver] WEBVIEW_9697 mapped to pid 9697
[debug] [AndroidDriver] Getting process name for webview
[debug] [ADB] Running 'C:\Program Files\android-sdk\sdk\platform-tools\adb.exe -P 5037 -s TCJRYLG6INQSKRP7 shell ps'
[debug] [AndroidDriver] WEBVIEW_9714 mapped to pid 9714
[debug] [AndroidDriver] Getting process name for webview
[debug] [ADB] Running 'C:\Program Files\android-sdk\sdk\platform-tools\adb.exe -P 5037 -s TCJRYLG6INQSKRP7 shell ps'
[debug] [AndroidDriver] Returning process name: 'unknown'
[debug] [AndroidDriver] Returning process name: 'unknown'
[debug] [AndroidDriver] Found webviews: ["WEBVIEW_unknown","WEBVIEW_unknown"]
[debug] [AndroidDriver] Available contexts: ["NATIVE_APP","WEBVIEW_unknown"]
[debug] [AndroidDriver] Connecting to chrome-backed webview context 'WEBVIEW_unknown'
[debug] [AndroidDriver] A port was not given, using random port: 8000
[debug] [Chromedriver] Changed state to 'starting'
[debug] [Chromedriver] The following Chromedriver executables were found:
[debug] [Chromedriver]     C:/Users/Penn/AppData/Roaming/npm/node_modules/appium/node_modules/appium-chromedriver/chromedriver/win/chromedriver.exe (minimum Chrome version '57.0.2987')
[debug] [ADB] Getting package info for 'com.google.android.webview'
[debug] [ADB] Running 'C:\Program Files\android-sdk\sdk\platform-tools\adb.exe -P 5037 -s TCJRYLG6INQSKRP7 shell dumpsys package com.google.android.webview'
[debug] [Chromedriver] Found Chrome bundle 'com.google.android.webview' version '62.0.3202'
[debug] [Chromedriver] Found 1 Chromedriver executable capable of automating Chrome '62.0.3202'.
[debug] [Chromedriver] Choosing the most recent, 'C:/Users/Penn/AppData/Roaming/npm/node_modules/appium/node_modules/appium-chromedriver/chromedriver/win/chromedriver.exe'.
[debug] [Chromedriver] If a specific version is required, specify it with the `chromedriverExecutable`desired capability.
[Chromedriver] Set chromedriver binary as: C:/Users/Penn/AppData/Roaming/npm/node_modules/appium/node_modules/appium-chromedriver/chromedriver/win/chromedriver.exe
[debug] [Chromedriver] Killing any old chromedrivers, running: FOR /F "usebackq tokens=5" %a in (`netstat -nao ^| findstr /R /C:"8000 "`) do (FOR /F "usebackq" %b in (`TASKLIST /FI "PID eq %a" ^| findstr /I chromedriver.exe`) do (IF NOT
%b=="" TASKKILL /F /PID %a))
[Chromedriver] No old chromedrivers seemed to exist
[debug] [Chromedriver] Cleaning any old adb forwarded port socket connections
[debug] [ADB] List forwarding ports
[debug] [ADB] Running 'C:\Program Files\android-sdk\sdk\platform-tools\adb.exe -P 5037 -s TCJRYLG6INQSKRP7 forward --list'
[Chromedriver] Spawning chromedriver with: C:/Users/Penn/AppData/Roaming/npm/node_modules/appium/node_modules/appium-chromedriver/chromedriver/win/chromedriver.exe --url-base=wd/hub --port=8000 --adb-port=5037 --verbose
[debug] [Chromedriver] Chromedriver version: '2.29.461591'
[debug] [JSONWP Proxy] Proxying [GET /status] to [GET http://127.0.0.1:8000/wd/hub/status] with no body
[debug] [JSONWP Proxy] Got response with status 200: "{\"sessionId\":\"\",\"status\":0,\"value\":{\"build\":{\"version\":\"alpha\"},\"os\":{\"arch\":\"x86_64\",\"name\":\"Windows NT\",\"version\":\"10.0.17134\"}}}"
[debug] [JSONWP Proxy] Proxying [POST /session] to [POST http://127.0.0.1:8000/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.tencent.mm","androidUseRunningApp":true,"androidProcess":"com.tencent.mm:tools","androidDeviceSerial":"TCJRYLG6INQSKRP7"}}}
[debug] [JSONWP Proxy] Got response with status 200: {"sessionId":"e4fe0100c0e99ef53c9a1beecb61e15f","status":100,"value":{"message":"chrome not reachable\n  (Driver info: chromedriver=2.29.461591 (62ebf098771772160f391d75e589dc567915b233),platform=Windows NT 10.0.17134 x86_64)"}}
[Chromedriver] Error: Failed to start Chromedriver session: An error occurred (Original error: chrome not reachable
[Chromedriver]   (Driver info: chromedriver=2.29.461591 (62ebf098771772160f391d75e589dc567915b233),platform=Windows NT 10.0.17134 x86_64))
[Chromedriver]     at Object.wrappedLogger.errorAndThrow (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\appium-support\lib\logging.js:78:13)
[Chromedriver]     at Chromedriver.callee$2$0$ (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\appium-chromedriver\lib\chromedriver.js:411:13)
[Chromedriver]     at tryCatch (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\babel-runtime\regenerator\runtime.js:67:40)
[Chromedriver]     at GeneratorFunctionPrototype.invoke [as _invoke] (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\babel-runtime\regenerator\runtime.js:315:22)
[Chromedriver]     at GeneratorFunctionPrototype.prototype.(anonymous function) [as throw] (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\babel-runtime\regenerator\runtime.js:100:21)
[Chromedriver]     at GeneratorFunctionPrototype.invoke (C:\Users\Penn\AppData\Roaming\npm\node_modules\appium\node_modules\babel-runtime\regenerator\runtime.js:136:37)
[Chromedriver]     at <anonymous>
[debug] [JSONWP Proxy] Proxying [POST /session] to [POST http://127.0.0.1:8000/wd/hub/session] with body: {"desiredCapabilities":{"chromeOptions":{"androidPackage":"com.tencent.mm","androidUseRunningApp":true,"androidProcess":"com.tencent.mm:tools","androidDeviceSerial":"TCJRYLG6INQSKRP7"}}}
[debug] [AndroidBootstrap] Emitting alert message...
[debug] [AndroidBootstrap] [BOOTSTRAP LOG] [debug] Emitting system alert message
[debug] [JSONWP Proxy] Got response with status 200: {"sessionId":"83c0b5de47a260402971260f99aea264","status":100,"value":{"message":"chrome not reachable\n  (Driver info: chromedriver=2.29.461591 (62ebf098771772160f391d75e589dc567915b233),platform=Windows NT 10.0.17134 x86_64)"}}
共收到 19 条回复 时间 点赞
雨夜狂奔 #1 · 2018年09月11日

chrome driver 版本不对

彭帅 #2 · 2018年09月11日 Author
对 雨夜狂奔 回复

版本已经替换了

雨夜狂奔 #3 · 2018年09月11日
对 彭帅 回复

报错明明是版本不对，你把 appiun 日志贴出来

彭帅 #4 · 2018年09月11日 Author
对 雨夜狂奔 回复

贴的内容被我修改了一遍，你再看看。

雨夜狂奔 #5 · 2018年09月11日
对 彭帅 回复

你这个错跟你最开始发帖都不一样了。。 这个错很多人遇到（chrome not reachable），我也提了 issue，不知道最新发布的 1.9.0 解决没（我没试过），你可以多找几个合适的 chromedriver 再试试，或者只有看看有其他人解决没

彭帅 #6 · 2018年09月11日 Author
对 雨夜狂奔 回复

看到有人提了在配置中加上：

chromeOptions: {
      androidProcess:"com.tencent.mm:tools"
    }

但我加了，又变成另外一个问题。😁

雨夜狂奔 #7 · 2018年09月11日
对 彭帅 回复

他们这是微信小程序的，普通 app 的 webview 不用加，感觉是 appium 的 bug。。

彭帅 #8 · 2018年09月11日 Author
对 雨夜狂奔 回复

内吐血，我的就是微信小程序。
改成这个后，就告诉我：
selenium.common.exceptions.WebDriverException: Message: An unknown server-side error occurred while processing the command. Original error: Failed to start Chromedriver session: A new session could not be created. (Original error: session not created exception: Chrome version must be >= 62.0.3202.0

雨夜狂奔 #9 · 2018年09月11日
对 彭帅 回复

你这个就是 chrome driver 版本不对

彭帅 #10 · 2018年09月11日 Author
对 雨夜狂奔 回复


提示的是这个鬼版本太低了，但是不知道怎么升级。

雨夜狂奔 #11 · 2018年09月11日
对 彭帅 回复
  1. 你只能降低你的 chromedriver 版本
  2. 如果你开启了 appium 的 chromedriver 版本自动发现，它首先获取你手机 webview 的版本，但是微信并不是使用的你手机的 webview，所以版本也不对的
彭帅 #12 · 2018年09月11日 Author
对 雨夜狂奔 回复

也是。
但现在换成对应微信 webview 版本了，就开始提示之前遇到的问题
Error: Failed to start Chromedriver session: An error occurred (Original error: chrome not reachable

cece0417 #13 · 2018年09月11日

emm。我好像遇到过，但是不是这个报错。是提示 unable to discover open pages，最后怎么解决的。是因为我们 app 里面 webview 全部改成了腾讯那个 x5 的。所以要需要在 app 内想办法打开调试地址 http://debugx5.qq.cominspect 开关，这样才算是打开 x5 的 webview。试试?还要一个是在 desired_caps 里面加一个，然后点击信息里面的打开 desired_caps['recreateChromeDriverSessions'] = 'true'，这个是解决多次切换 context 的时候，chromedriver 重启的方法

彭帅 #14 · 2018年09月11日 Author
对 cece0417 回复

嗯...
你这个腾讯内核我肯定是开了的。

Jacc #15 · 2018年09月11日

安卓什么版本？

彭帅 #16 · 2018年09月12日 Author
对 Jacc 回复 
Android System WebView
62.0.3202.84
Jacc #17 · 2018年09月12日
对 彭帅 回复

不是 webview， 系统版本 6.0 7.0 8.0？8.0 应该是有问题的，微信里的版本应该是 57 吧

littlefive #18 · 2018年10月14日

1，版本不对
2，有的时候版本对了，也是报错（之前用的是虚拟机调试的，更换了虚拟机结果成功了）

mackle #19 · 2020年11月20日

楼主解决了嘛，可真头疼

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