1471899 - HAR missing response content size without choosing netmonitor

Status: RESOLVED INVALID

(DevTools :: Netmonitor, defect, P3)

Description

[Peter Hedenskog]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Steps to reproduce:

Using the https://github.com/devtools-html/har-export-trigger/ together with FF 61 works great when you have devtools open and chose the netmonitor tab. If the netmonitor tab isn't chosen, the HAR file is (always?) not valid, since it missed content size of one or more requests. 

Here's a gist with a HAR that misses log.entries[0].response.content.size
https://gist.github.com/soulgalore/19f68eeee12f20fce45d1ba1995ff8a7

I tried a couple of different URLs and always get the same result with one or more responses missing the content size.

Comment 1

[roxleitan]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0 
Build ID: 20180621125625    

I tested this issue on Mac OS X 10.13 with Firefox Release 61.0 using the file https://github.com/devtools-html/har-export-trigger/ from description and the STR provided in the link.
The following error is displayed in the Browser Console:

No matching message handler for the given recipient. MessageChannel.jsm:924
_handleMessage/</<
resource://gre/modules/MessageChannel.jsm:924:11

I am assigning a component to this issue in order to involve the development team and get an opinion on this.

Comment 2

[Peter Hedenskog]

Any change this can get a little love? It's not super important since it works by just choosing the tab. If there's another solution (for the future) where you don't need to open the devtools at all, that's more important for me (since it will be cleaner to integrate).

Comment 3

[Jan Honza Odvarko [:Honza] (always need-info? me)]

I tested this and it seems to be working for me:

Here is what I've done

0. Install HAR Export Trigger extension from: https://addons.mozilla.org/en-US/firefox/addon/har-export-trigger/
1. Load HAR Test page: http://softwareishard.com/test/harexporttrigger/
2. Open DevTools Toolbox - the Network panel doesn't have to be selected
3. Reload the page so, some HTTP requests are collected
4. Click the getHar button on the page
5. HAR (JSON) text should be available in a <textarea> element below the button
6. Copy paste the JSON to http://softwareishard.com/har/viewer/ and press Preview button
7. The JSON is properly parsed and details rendered on the page.

What am I doing wrong?

Peter, I am happy to fix this. What should I do to reproduce the issue?

Comment 4

[Peter Hedenskog]

I've seen that I've disabled choosing the tab in 2-3 years ago in Browsertime, where I added a comment in the code that its not needed anymore, so I guess it somehow got fixed or I was wrong:
https://github.com/sitespeedio/browsertime/blob/main/lib/firefox/webdriver/builder.js#L110-L112

I think you can close this.