[webkit-qt] Implementing my cache- control flow

Benjamin Meyer ben at meyerhome.net
Fri May 21 14:04:36 PDT 2010

Do you plan on putting your db cache implementation up online?  I would be interested in checking it out (I wrote the simple disk one in Qt).  Have you written benchmarks yet?

-Benjamin Meyer

On May 21, 2010, at 1:15 PM, siddharth.mathur at nokia.com wrote:

> Tarandeep, Benjamin,
> You can reduce your client's chattiness with the server if you also set the QNetworkRequest::PreferCache flag on outbound HTTP requests: 
> request2.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
> The default is PreferNetwork, which means that even though the content was originally sent with an "expires" head, the cache will still check with the server if it has a newer copy. This is bad for performance, but good for correctness. 
> http://doc.trolltech.com/4.6/qnetworkrequest.html#CacheLoadControl-enum
> http://doc.trolltech.com/4.6/qnetworkdiskcache.html#details
> Siddharth
>> -----Original Message-----
>> From: webkit-qt-bounces at lists.webkit.org [mailto:webkit-qt-
>> bounces at lists.webkit.org] On Behalf Of ext Benjamin Meyer
>> Sent: Thursday, May 20, 2010 12:03 AM
>> To: Tarandeep Singh
>> Cc: webkit-qt at lists.webkit.org
>> Subject: Re: [webkit-qt] Implementing my cache- control flow
>> All of the html caching is done outside of webkit and in the QNetwork
>> classes.  Referring to the docs for the QNetworkCache interface is best.
>> What you have it about correct, often times even if the cache is ok it
>> will update headers if I remember.
>> -Benjamin Meyer
>> On Apr 13, 2010, at 2:25 PM, Tarandeep Singh wrote:
>>> Hi,
>>> I am trying to implement a Database cache for webkit for my project.
>> Can
>>> someone please confirm if this control flow is correct-
>>> 1) For a given url, webkit will get its metadata by calling the
>> function
>>>    QNetworkCacheMetaData metaData( Url)
>>> 2) webkit will check the last modified date, expiration date stored in
>> the
>>> metadata and if these dates are fine (compared to the actual dates
>> found on
>>> the site) then it will get the data by calling the function-
>>>    QIODevice * data( Url)
>>> 3) else it will get the file from network and then store in cache by
>> first
>>> calling prepare( ) and then insert( )
>>> -Tarandeep
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