Chrome 50 displaying duplicate log entries

[richardwo]

Using Chrome 50 on OS X 10.11.4 duplicate entries are displayed for each server side log command.
I've checked on the server (PHP) and it is only sending one header for each log command.

[hlev]

Same here with Chrome 51 64bit.
On one occasion the console was reporting an entry as being output by chrome-extension://noaneddfkdjfnfdakjjmocngnfkfehhd which is Chrome Logger, and the duplicate entry by something called "VM64extension..." which looked internal to Chrome (?). I could not make the dev tools print that again, it must have been a coincidence. It always groups the duplicates and makes it look like as if both came from Chrome Logger.

[AndreKR]

It seems to happen only if the response body is empty.

[loonighan]

No problems with empty body tags. I use php mostly for populating,updating,creating in jTable
But I get duplicate entries if there is a function in the php.
Remove the function, no duplicate entries
Remarkable.

[hlev]

@loonighan It's not empty HTML body tags, but HTTP responses with an empty response body, what are the problem. Such as responses to those AJAX requests you make with jTable.

[ccampbell]

Does anyone have an easy way for me to reproduce this? Thanks

[hlev]

Sure. I actually managed to reproduce this with a non-empty response body as well.

// bug.php
<?php
include('ChromePhp.php');

$bug = 'duplication';
ChromePhp::log($bug);
echo 'boo';

With the PHP built-in webserver
php -S localhost:4545 bug.php

Enable the logger extension and visit localhost:4545 in Chrome.

Versions:
PHP 5.6.28 (cli) Linux
Chrome 56.0.2924.87 (64-bit)
Chrome Logger 4.1.1 extension
ChromePhp fresh from master

[hlev]

Bugger. I think I found a bug in this approach itself an mislead myself.

Chrome makes two requests, one to localhost:4545 and one to localhost:4545/favicon.ico and both have the X-ChromeLogger-Data response header because the built-in webserver runs the script for each and every request by design. Silly me. That's the source of the duplication here.

It can be easily fixed though with a "route" and this time with really an empty response body.

<?php
include('ChromePhp.php');

if ($_SERVER['REQUEST_URI'] !== '/get')  {
 die();
}

$bug = 'duplication';
ChromePhp::log($bug);

Visit localhost:4545/get and the console will start duplicating the message.
Send any response and the duplication stops

<?php
include('ChromePhp.php');

if ($_SERVER['REQUEST_URI'] !== '/get')  {
 die();
}

$bug = 'duplication';
ChromePhp::log($bug);
echo 'no duplications here`

[bkdotcom]

If I go directly to "generateCss.php" ( sets Content-Type: text/css) I get duplicate log
if I'm on the html page that makes a request to "generateCss.php" .. the log is not duplicated.
¯\_(ツ)_/¯

[disccomp]

No missing favicon for me, console shows the output coming from two scripts:
debugger:///VM646 log.js (built-in script, click on it and source is blank)
chrome-extension://noaneddfkdjfnfdakjjmocngnfkfehhd/log.js (chromelogger)

(Chrome 66, OSX)

[danielserrao]

I got the same bug here. Any updates on this?