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"Cannot modify header information" when using iframe #5737

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anonymous-matomo-user opened this issue Jul 25, 2008 · 4 comments
Closed

"Cannot modify header information" when using iframe #5737

anonymous-matomo-user opened this issue Jul 25, 2008 · 4 comments
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Bug For errors / faults / flaws / inconsistencies etc.
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RobotRock

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@anonymous-matomo-user
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If I insert an iframe like this:

```

```

I get this output (and error):

Evolution over the period

2 returning visits 2 actions by the returning visits 1 maximum actions by a returning visit 0 min 20 s total time spent by returning visits 2 times that a returning visit has bounced (left the site after one page)

Visits per visit duration
2- 4 min 0-30s 11-15 min 30-60s 6- 8 min 8-11 min 4- 6 min 15 min 1- 2 min
Visits per number of pages
1 page 6-7 pages 4 pages 15-20 pages 11-14 pages 3 pages 5 pages 2 pages 20 pages 8-10 pages

```
Warning: Cannot modify header information – headers already sent by (output started at /var/www/html/piwik/plugins/VisitFrequency/Controller.php:11) in /var/www/html/piwik/modules/View.php on line 87

Backtrace —>

  1. Piwik_ErrorHandler(2, Cannot modify header information – headers already sent by (output started at /var/www/html/piwik/plugins/VisitFrequency/Controller.php:11), /var/www/html/piwik/modules/View.php, 87, Array ())
  2. header(Content-Type: text/html; charset=utf-8) called at [/var/www/html/piwik/modules/View.php:87]
  3. Piwik_View→render() called at [/var/www/html/piwik/plugins/Widgetize/Controller.php:93]
  4. Piwik_Widgetize_Controller→iframe()
  5. call_user_func_array(Array (0 => Piwik_Widgetize_Controller Object ([] => Widgetize,[] => 2008-07-25,[] => Piwik_Date Object ([timestamp] => 1216936800)),1 => iframe), Array ()) called at [/var/www/html/piwik/modules/FrontController.php:150]
  6. Piwik_FrontController→dispatch() called at [/var/www/html/piwik/index.php:55]
    ```
@mattab
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mattab commented Jul 28, 2008

See #5735

@anonymous-matomo-user
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Replying to [Ticket 317 – systemaddict](ticket:317):

> If I insert an iframe like this:
>
> <iframe src=“http://domain.com/index.php?module=Widgetize&action=iframe&moduleToWidgetize=VisitFrequency&actionToWidgetize=index&idSite=1&period=day&date=today&showDataTableFooter=0&token_auth=XXXXX” width=“450” height=“200” scrolling=“auto” frameborder=“0” marginheight=“0” marginwidth="0"></iframe>

I’m getting the same error using the latest version from the trunk. This is still an issue and should be fixed, because this widgetize module is absolutely great.
The part “Evolution over the last 30 days” is printed before the actual <html><body> section!

@anonymous-matomo-user
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Attachment: Error Message when Widgetizing VisitsSummary
[2008-07-30_1110.png](http://issues.piwik.org/attachments/5737/2008-07-30_1110.png)

@mattab
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mattab commented Oct 29, 2008

Thanks for your report!
I finally fixed that bug. we were using dispatch() which was outputing the data, instead of fetchDispatch()..

available on SVN

@anonymous-matomo-user anonymous-matomo-user added this to the RobotRock milestone Jul 8, 2014
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