Switching back to webview - An unknown server-side error occurred - Original error: Unexpected token c in JSON at position 247

[amitrparmar]

Description

I am getting an issue on iOS device when I switched to NATIVE view and try to back into Webview.

Environment

• Appium server version: 1.8.0
• MAC OS (Where appium runs): High Sierra 10.13.4
• Desktop OS version: Windows 10
• Mobile platform version: 10.3.3
• Real device : iPAD 4

Details

AppiumDriver().getContextHandles();

APPIUM LOGs:

[HTTP] <-- GET /wd/hub/session/2b68dc2a-59d8-4925-bdd7-89d0ff51e90d/screenshot 200 2068 ms - 2024946
[HTTP]
[HTTP] --> GET /wd/hub/session/2b68dc2a-59d8-4925-bdd7-89d0ff51e90d/context
[HTTP] {}
[debug] [MJSONWP] Calling AppiumDriver.getCurrentContext() with args: ["2b68dc2a-59d8-4925-bdd7-89d0ff51e90d"]
[debug] [XCUITest] Executing command 'getCurrentContext'
[debug] [MJSONWP] Responding to client with driver.getCurrentContext() result: "NATIVE_APP"
[HTTP] <-- GET /wd/hub/session/2b68dc2a-59d8-4925-bdd7-89d0ff51e90d/context 200 2 ms - 84
[HTTP]
[HTTP] --> GET /wd/hub/session/2b68dc2a-59d8-4925-bdd7-89d0ff51e90d/contexts
[HTTP] {}
[debug] [MJSONWP] Calling AppiumDriver.getContexts() with args: ["2b68dc2a-59d8-4925-bdd7-89d0ff51e90d"]
[debug] [XCUITest] Executing command 'getContexts'
[debug] [iOS] Getting list of available contexts
[debug] [iOS] Retrieving contexts and views
[debug] [iOS] Selecting by url: false
[debug] [RemoteDebugger] Getting WebKitRemoteDebugger pageArray: localhost, 27753
[debug] [RemoteDebugger] Sending request to: http://localhost:27753/json
[MJSONWP] Encountered internal error running command: SyntaxError: Unexpected token c in JSON at position 247
[MJSONWP] at JSON.parse ()
[MJSONWP] at WebKitRemoteDebugger.getJsonFromUrl$ (/usr/local/lib/node_modules/appium/node_modules/appium-remote-debugger/lib/webkit-remote-debugger.js:85:22)
[MJSONWP] at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
[MJSONWP] at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:315:22)
[MJSONWP] at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:100:21)
[MJSONWP] at GeneratorFunctionPrototype.invoke (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
[MJSONWP] at
[HTTP] <-- GET /wd/hub/session/2b68dc2a-59d8-4925-bdd7-89d0ff51e90d/contexts 500 7 ms - 213

Java Client Error

org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Unexpected token c in JSON at position 247 (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 16 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'COMPUTER000117', ip: '192.168.133.60', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_91'
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities [{app=/Users/admin/Desktop/IPA/TouchClassic_5.0.1.app, networkConnectionEnabled=false, databaseEnabled=false, deviceName=ipad, fullReset=true, platform=MAC, showXcodeLog=true, newCommandTimeout=300, platformVersion=10.3.1, webStorageEnabled=false, locationContextEnabled=false, automationName=XCUITest, browserName=, takesScreenshot=true, javascriptEnabled=true, platformName=iOS, udid=d8a8f24c27769d00627929f291b15eb015e9e8c4, autoAcceptAlerts=true}]
Session ID: 2b68dc2a-59d8-4925-bdd7-89d0ff51e90d

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:40)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:235)
at io.appium.java_client.AppiumDriver.getContextHandles(AppiumDriver.java:562)

Requesting JSON url

I'm getting below JSON while hitting http://localhost:27753/json URL.

[{
  "devtoolsFrontendUrl": "/devtools/devtools.html?ws=192.168.134.46:27753/devtools/page/8",
  "faviconUrl": "",
  "thumbnailUrl": "/thumb/http://192.168.134.212/touchcg/?device=ios&sftouch=1&secure=1#pages/callscalendar/{"loadTime"%3A"3322"}",
  "title": "Consumer Goods 12.20",
  "url": "http://192.168.134.212/touchcg/?device=ios&sftouch=1&secure=1#pages/callscalendar/{"loadTime"%3A"3322"}",
  "webSocketDebuggerUrl": "ws://192.168.134.46:27753/devtools/page/8",
  "appId": "PID:322"
}]

Error

org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Unexpected token l in JSON at position 223 (WARNING: The server did not provide any stacktrace information)

[jacattau]

I'm getting similar behavior but not the same error. iOS 11.3, Appium 1.8.1, IWDP 1.8. I can't get into a webview at all.

[debug] [W3C] Calling AppiumDriver.getContexts() with args: ["cefcc8fd-3629-4640-986e-59757a20de62"] [debug] [XCUITest] Executing command 'getContexts' [debug] [iOS] Getting list of available contexts [debug] [iOS] Retrieving contexts and views [debug] [iOS] Selecting by url: false [debug] [RemoteDebugger] Getting WebKitRemoteDebugger pageArray: localhost, 27753 [debug] [RemoteDebugger] Sending request to: http://localhost:27753/json [debug] [RemoteDebugger] Page element JSON: [{"devtoolsFrontendUrl":"/devtools/devtools.html?ws=localhost:27753/devtools/page/2","faviconUrl":"","thumbnailUrl":"/thumb/http://localhost:8080/var/containers/Bundle/Application/A7581B35-D48A-4086-A175-A2615C83E41E/Quotes.app/www/index.html","title":"Quotes for Sales Professionals","url":"http://localhost:8080/var/containers/Bundle/Application/A7581B35-D48A-4086-A175-A2615C83E41E/Quotes.app/www/index.html","webSocketDebuggerUrl":"ws://localhost:27753/devtools/page/2","appId":"PID:428"}] [debug] [MJSONWP] Responding to client with driver.getContexts() result: ["NATIVE_APP","WEBVIEW_2"] [HTTP] <-- GET /wd/hub/session/cefcc8fd-3629-4640-986e-59757a20de62/contexts 200 8 ms - 98 [HTTP] [HTTP] --> POST /wd/hub/session/cefcc8fd-3629-4640-986e-59757a20de62/context [HTTP] {"name":"WEBVIEW_2"} [debug] [W3C] Calling AppiumDriver.setContext() with args: ["WEBVIEW_2","cefcc8fd-3629-4640-986e-59757a20de62"] [debug] [XCUITest] Executing command 'setContext' [debug] [iOS] Attempting to set context to 'WEBVIEW_2' [debug] [RemoteDebugger] WebKit debugger web socket connected to url: ws://localhost:27753/devtools/page/2 [debug] [RemoteDebugger] Starting to listen for JavaScript console [debug] [RemoteDebugger] Sending WebKit data: {"method":"Console.enable","params":{"objectGroup":"console","includeCommandLineAPI":true,"doNotPauseOnExceptionsAndMuteConsole":true}} [debug] [RemoteDebugger] Webkit response timeout: 5000 [debug] [RemoteDebugger] Receiving WebKit data: '{"result":{},"id":1}' [debug] [RemoteDebugger] Found handler for message '1' [debug] [RemoteDebugger] WebKit debugger got a message for 'Console.enable' and have no handler, doing nothing. [debug] [XCUITest] Connection to WDA timed out [debug] [iProxy] recv failed: Operation not permitted [MJSONWP] Encountered internal error running command: TimeoutError: operation timed out [MJSONWP] at afterTimeout (/Users/req90562/npm/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:46:19) [MJSONWP] at Timeout.timeoutTimeout [as _onTimeout] (/Users/req90562/npm/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:76:13) [MJSONWP] at ontimeout (timers.js:460:11) [MJSONWP] at tryOnTimeout (timers.js:298:5) [MJSONWP] at Timer.listOnTimeout (timers.js:261:5) [HTTP] <-- POST /wd/hub/session/cefcc8fd-3629-4640-986e-59757a20de62/context 500 5014 ms - 190

[artygus]

please checkout master branch

brew reinstall --HEAD ios-webkit-debug-proxy

[mailsumit86]

brew reinstall --HEAD ios-webkit-debug-proxy doesn't work. I also tried updating Appium to latest version 1.8.1, but no success.

[artygus]

hi @mailsumit86, can you confirm you're seeing same issue the OP posted above?

[MJSONWP] Encountered internal error running command: SyntaxError: Unexpected token c in JSON at position ...

[mailsumit86]

Below is the log trace from appium :

[Appium] Capabilities:
[Appium] webkitResponseTimeout: 120000
[Appium] preventWDAAttachments: true
[Appium] noReset: false
[Appium] startIWDP: true
[Appium] newCommandTimeout: 500
[Appium] platformVersion: 11.1
[Appium] automationName: XCUITest
[Appium] browserName: safari
[Appium] --session-override: true
[Appium] platformName: iOS
[Appium] udid: 6f30a0c6f5a8eb2b7a490145ba110f721be8f1cc
[Appium] deviceName: iPhone8
[BaseDriver] The following capabilities were provided, but are not recognized by appium: --session-override.
[BaseDriver] Session created with session id: 72ce88d1-effa-432c-9d1e-05668bbe913c
[XCUITest] Determining device to run tests on: udid: '6f30a0c6f5a8eb2b7a490145ba110f721be8f1cc', real device: true
[XCUITest] Safari test requested
[XCUITest] Setting up real device
[XCUITest] Using WDA path: '/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent'
[XCUITest] Using WDA agent: '/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent/WebDriverAgent.xcodeproj'
[XCUITest] Will reuse previously cached WDA instance at 'http://localhost:8100/'. Set the wdaLocalPort capability to a value different from 8100 if this is an undesired behavior.
[XCUITest] Using provided WebdriverAgent at 'http://localhost:8100/'
[XCUITest] Setting '555' permissions to '/Users/cnbcqa/Library/Developer/Xcode/DerivedData/WebDriverAgent-brdadhpuduowllgivnnvuygpwhzy/Logs/Test/Attachments' folder
[XCUITest] Skipping setting of the initial display orientation. Set the "orientation" capability to either "LANDSCAPE" or "PORTRAIT", if this is an undesired behavior.
[XCUITest] TimeoutError: operation timed out
[XCUITest] at afterTimeout (/usr/local/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:46:19)
[XCUITest] at Timeout.timeoutTimeout [as _onTimeout] (/usr/local/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:76:13)
[XCUITest] at ontimeout (timers.js:458:11)
[XCUITest] at tryOnTimeout (timers.js:296:5)
[XCUITest] at Timer.listOnTimeout (timers.js:259:5)
[XCUITest] Setting '755' permissions to '/Users/cnbcqa/Library/Developer/Xcode/DerivedData/WebDriverAgent-brdadhpuduowllgivnnvuygpwhzy/Logs/Test/Attachments' folder
[MJSONWP] Encountered internal error running command: TimeoutError: operation timed out
[MJSONWP] at afterTimeout (/usr/local/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:46:19)
[MJSONWP] at Timeout.timeoutTimeout [as _onTimeout] (/usr/local/lib/node_modules/appium/node_modules/bluebird/js/release/timers.js:76:13)
[MJSONWP] at ontimeout (timers.js:458:11)
[MJSONWP] at tryOnTimeout (timers.js:296:5)
[MJSONWP] at Timer.listOnTimeout (timers.js:259:5)
[HTTP] <-- POST /wd/hub/session 500 125623 ms - 156

The safari opens up and go to appium.io, but then just crashes.

[artygus]

are you using appium 1.8.1? there was a bug #258 (comment) appium/appium#10741

[artygus]

from the log I can't see any erroneous output from IWDP, anyways it doesn't seem to be related to original issue, feel free to open a new issue providing more details on the issue, it could be related to appium eco-system

[artygus]

closing the issue since JSON parsing part was fixed in 2f08a1c.