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HAR file generation fails in Firefox 59.0.2

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Hello: I am developing a test with selenium 3.11.0 + geckodriver 0.19.1 + firefox 59.0.2 to get the HAR file when loading a page. I got always an error, and no HAR file when using the latest version of Firefox. I could not find any error in the test configuration, and the logs showed always an error in the javascript har-builder.js, which is internal to Firefox. I have not modified the standard configuration of Firefox, or using any add-ons. The idea is to use an standard configuration. I tested in my Mac High Sierra and in a Ubuntu 16.04. Same results I switched the version to Firefox 57.0, and the tests are now always successful in both the Mac and in the Ubuntu, and the HAR file is generated every time. I attach images of the geckodriver logs with every case...Uploading of images fails.. :-(  !!!

I did not find any related issue in the support page.

Regards, Claudio

Hello: I am developing a test with selenium 3.11.0 + geckodriver 0.19.1 + firefox 59.0.2 to get the HAR file when loading a page. I got always an error, and no HAR file when using the latest version of Firefox. I could not find any error in the test configuration, and the logs showed always an error in the javascript har-builder.js, which is internal to Firefox. I have not modified the standard configuration of Firefox, or using any add-ons. The idea is to use an standard configuration. I tested in my Mac High Sierra and in a Ubuntu 16.04. Same results I switched the version to Firefox 57.0, and the tests are now always successful in both the Mac and in the Ubuntu, and the HAR file is generated every time. I attach images of the geckodriver logs with every case...Uploading of images fails.. :-( !!! I did not find any related issue in the support page. Regards, Claudio

Additional System Details

Installed Plug-ins

  • Shockwave Flash 29.0 r0

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:57.0) Gecko/20100101 Firefox/57.0

More Information

Question owner

I could not upload the images with the error, so I copy the error message from the gecko driver log, as it may help:

console.error:

 Message: TypeError: requestPostData is undefined
 Stack:
   buildPostData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:268:9

buildRequest@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:186:30 buildEntry@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:128:27 build@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:62:30 buildHarData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-exporter.js:175:12 fetchHarData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-exporter.js:140:12 executeExport@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:188:12 autoExport@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:135:12 pageLoadDone/<@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:116:16

I could not upload the images with the error, so I copy the error message from the gecko driver log, as it may help: console.error: Message: TypeError: requestPostData is undefined Stack: buildPostData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:268:9 buildRequest@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:186:30 buildEntry@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:128:27 build@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-builder.js:62:30 buildHarData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-exporter.js:175:12 fetchHarData@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-exporter.js:140:12 executeExport@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:188:12 autoExport@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:135:12 pageLoadDone/<@resource://devtools/shared/base-loader.js -> resource://devtools/client/netmonitor/src/har/har-automation.js:116:16