Error 330 net ERR CONTENT DECODING FAILED

Question

Recently we migrated to a new server  After 2 days  I got the following issues  1  We had a crash on a session table  which we easily fixed by reparing it  2  We run OpenX as our adserver  and it also crashed  but there is no evidence in error log It let s you login  but at the moment of looking to dashboard php  we get the   Error 330  net  ERR CONTENT DECODING FAILED    Google Chrome    and  The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression   Firefox     OpenX uses the following services on PHP   OpenX requires  http   www openx com docs 2 8 adminguide System 20requirements  OpenX uses the default PHP settings  However  server administrators sometimes change these settings  Before you install OpenX check that the following settings are correct   magic quotes runtime must be off safe mode must be off register argc argv must be on if you want to run maintenance via command line file uploads need to be turned on to allow HTTP file uploads OpenX requires the following PHP extensions   Either the mysql extension  or the pgsql  The mysqli extension is not supported  The ZLib extension  to convert links inside compressed Flash files generated by Flash MX  The FTP extension  If this is not present OpenX will try to simulate it  which can be a less stable solution   The GD extension  to generate graphs on the Home page  If the extension is not enabled you will not be able to view graphs or statistics on your Home page  Either the openssl extension or an SSL-enabled curl extension are required in order to logon to the Home page  If SSL is not enabled you will receive an error message in the Home page  but there is no impact on operations     Any clue on possible reasons or on how to gather more information will be much appreciated  Thanks

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It happens when your HTTP request s headers claim that the content is gzip encoded  but it isn t   Turn off gzip encoding setting or make sure the content is in fact encoded

User · Answer

We also had this problem when upgrading our system to Revive  After turning of GZIP we found the problem still persisted  Upon further investigation we found the file permissions where not correct after the upgrade  A simple recursive chmod did the trick

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There is a bad Java bug that will cause this   https   bugs java com view bug do bug id JDK-8189789

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In my case it happened when adding a new application to IIS that needed to be proxied with Apache    I needed to set ProxyHTMLEnable On to ProxyHTMLEnable Off to get the content   It looks like some js code most have triggered the error  but this gave me at least something to work from    IIS is sending the page content Content-Encoding  gzip   lt Proxy  http   192 168 1 1 81  gt      ProxyHTMLEnable On     gt  change this to Off     ProxyHTMLURLMap            lt  Proxy gt

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I saw this error in combination with the PageSpeed module enabled  The PageSpeed module has a cache that can be gzip compressed  So apparently what can happen is that content gets double compressed   In order to rewrite resources  PageSpeed must cache them server-side  Until 1 10 33 0  these resources had been stored uncompressed  To reduce disk usage  decrease server latency  support higher compression levels  and increase server throughput  the HTTPCache can automatically gzip compressable resources as they are stored in the cache  To configure cache compression  set HttpCacheCompressionLevel to values between -1 and 9  with 0 being off  -1 being gzip s default compression  and 9 being maximum compression  The default value is 9  maximum compression   I solved it by adding this line to my PageSpeed config  HttpCacheCompressionLevel 0 which disables the compression

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One more idea for anyone else getting this     I had some gzipped svg  but it had a php error in the output  which caused this error message   Because there was text in the middle of gzip binary   Fixing the php error solved it

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If you are to use the Codeigniter framework then just make this into config file    config  compress output     FALSE    And in php ini configuration file  use   zlib output compression On

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A far more common answer is that you have some error that is getting appended to whatever your compressing  The solution is to set display errors   Off in your php ini file  Check in your terminal if it s On by running php --info and look for  display errors    That should do it  And  how do you discover what errors you re actually  Check your PHP error logs whenever you hit that route page    Good luclk

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Enable gzip compression in php ini   zlib output compression   On   And add this to your  htaccess file    lt IfModule mod deflate c gt      Compress HTML  CSS  JavaScript  Text  XML and fonts   AddOutputFilterByType DEFLATE application javascript   AddOutputFilterByType DEFLATE application rss xml   AddOutputFilterByType DEFLATE application vnd ms-fontobject   AddOutputFilterByType DEFLATE application x-font   AddOutputFilterByType DEFLATE application x-font-opentype   AddOutputFilterByType DEFLATE application x-font-otf   AddOutputFilterByType DEFLATE application x-font-truetype   AddOutputFilterByType DEFLATE application x-font-ttf   AddOutputFilterByType DEFLATE application x-javascript   AddOutputFilterByType DEFLATE application xhtml xml   AddOutputFilterByType DEFLATE application xml   AddOutputFilterByType DEFLATE font opentype   AddOutputFilterByType DEFLATE font otf   AddOutputFilterByType DEFLATE font ttf   AddOutputFilterByType DEFLATE image svg xml   AddOutputFilterByType DEFLATE image x-icon   AddOutputFilterByType DEFLATE text css   AddOutputFilterByType DEFLATE text html   AddOutputFilterByType DEFLATE text javascript   AddOutputFilterByType DEFLATE text plain   AddOutputFilterByType DEFLATE text xml      Remove browser bugs  only needed for really old browsers    BrowserMatch  Mozilla 4 gzip-only-text html   BrowserMatch  Mozilla 4  0 678  no-gzip   BrowserMatch  bMSIE  no-gzip  gzip-only-text html   Header append Vary User-Agent  lt  IfModule gt

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I enabled zlib output compression in php ini and it seemed to fix the issue for me

User · Answer

Do you use the ob start ob gzhandler  function  If so and If you output any content above the ob start ob gzhandler  function  you ll get this error  You can don t use this function or don t output content above this function  The ob gzhandler callback function will determine what type of content encoding the browser will accept and will return its output accordingly  So if you output content above this function  the content s encoding maybe different from the output content of ob gzhandler and that cause this error

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In case anyone still hunting the cause of this hateful issue  there comes a solution to nail the causing file  https   www drupal org node 1622904 comment-10768958 from Drupal community   And I quote   Edit   includes bootstrap inc   function drupal load    It is a short function  Find following line  include once DRUPAL ROOT          filename  Temporarily replace it by  ob start    include once DRUPAL ROOT          filename   value   ob get contents    ob end clean    if   value              filename   check plain  filename      value   check plain  value     print  File   filename  produced unforgivable content    value       exit

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I had a bit of a dummy moment this morning when I realized what caused this issue for me   The strange thing is that the request was failing in both Firefox and Chrome  but worked when I tried to access via Fiddler Web Debugger   For me  the problem was I had mis-typed a character into one of the PHP files in the project  I didn t notice this until I checked Git for changes to the project   In my case I had  m lt  php runMyProgram      gt    Once I erased the m  it started working again

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I was experiencing this issue on a drupal site and none of the other solutions in this thread helped  After some troubleshooting I found the local settings php had a closing tag with a space after it like so    lt  php  databases   array     default    gt    array        default    gt      array          driver    gt   mysql          database    gt   xxx          username    gt   xxx          password    gt   xxx          port    gt             host    gt   xxx                    gt      Updating local settings php to the following resolved    lt  php  databases   array     default    gt    array        default    gt      array          driver    gt   mysql          database    gt   xxx          username    gt   xxx          password    gt   xxx          port    gt             host    gt   xxx                    The closing      PHP tag is not necessary here  If you choose to use a closing tag you must ensure there are no characters   whitespace after it

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codes need to save UTF8 without BOM while recording  Sometimes  written codes with  Notepad    or other coding tools and use UTF8 encode  this error occurs  I m sorry  I do not know English  This is just my experience

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This error caused because of output buffering modules extension ob gzhandler  added  While output buffering use at starting ob start   and ending ob flush     lt  php        ob start   ob gzhandler          echo json encode  array       ob end flush      gt    Use this     lt  php        ob start         echo json encode  array       ob flush      gt

[php] Error 330 (net::ERR_CONTENT_DECODING_FAILED):

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