Devtool.network - call to getContent(callback) return content == null (video mp4)

[Kevin Leduc]

Hi,

I try to find a way to extract mp4 content received and manipulated by the browser. 

I need to extract it without make a new call to the server. I try to use the devtools.network API.

Inside the onRequestFinished event, I call the function getContent to get the content.

The problem is the value I got is always null and I don't know why... 

I navigate in this page for my test : "http://www.w3schools.com/html/html5_video.asp"

Thank for your help, here my code : 

chrome.devtools.network.onRequestFinished.addListener(

  function(request) {

    if(request.response.content.mimeType == "video/mp4" &&

      request.request.url == "http://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_1mb.mp4") {

      request.getContent(function(content){

        if(content == null) {

          console.log("Why content is null! :( ... and my content size is suppose to be :");

          console.log(request.response.content.size);

        }

        sendFileToMyOwnServer("video123.mp4", content);

      });

    }

  }

);

function sendFileToMyOwnServer(title, content) {

  $.ajax({url:"http://localhost:3000/" + title, 

          type: 'POST',

          contentType: 'video/mp4', 

          data: content});

}

[Ala Rihane]

Same thing, did you found a solution ?

[PhistucK]

You can search crbug.com for an existing issue and star it. If you cannot find one, file a new issue using the "New issue" link on the same page.

Please, do not add a "+1" or "Me too" or "Confirmed" (or similar) comment. It just wastes the time of Chrome engineers and sends unnecessary e-mails to all of the people who starred the issue.

You can reply with a link to the found or created issue and might get triaged (and fixed) faster.

Thank you.

☆PhistucK

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[Леонид Горшков]

I have the same problem, now in Chrome 74.0.3729.131. Sometimes but not always content is null, I think it reles how often requests are sended

 

[Леонид Горшков]

This is my case, content null because of some error

 

[Леонид Горшков]

I checked when was called xhr.abort() and AbortController.abort() that is used in a 'fetch' call. So I found out If abort occured before reading headers, that getContent API returns response with code=0. But if request aborted while reading body, that getConent callback will be called with null. So this is my case and it is not bug in my opinion.