Thanks, that helped clear up my confusion, I made the changes in my
code, and so far it works great, but I did start getting this error
message:
[error] "RefEncoder: Error reading XHTML string: could not parse xhtml
entity"
My guess is that the encoding may not be XHTML compatible like it says,
I did verify the code online and by hand, it does contain HTML 5 code,
is that an issue?
I say this because I noticed if I put over 30 HTML 5 audio controls on
one page that the navigation stops working (page freezes up when you try
to navigate using menu or other controls),
still troubleshooting that one,
but I decided to put push buttons there to activate the player so its
not streaming all the feeds at the same time, and only loading those you
listen too,
but I have not tracked down the source of this error message yet, its
generated after all the functions have exited and the page is being
rendered,
and I do not see any content missing from the page,
so its possible its unrelated at this point, but it makes tracking it
down real hard, but it is in this class, so I will figure it out,
but it will make it easier if I know that HTML 5 Code is ok to use in
Wt,
by XHTML, I can assume nothing, is it XHTML 5, I did not find this
listed in any documents, so I have to ask?
keep in mind this data is coming from a database and wrapped in a
WViewWidget,
it also only uses single quotes, so I do not have to escape double
quotes so I can use them in strings,
as such, it contains: <br />, which could be <br> or like <b></b>, <p
class='single-quotes'>it′s “Content”</p>,
as well as special tags: <audio controls>...
and is not using messageResourceBundle,
I will have to figure out where the error message is generated to start
troubleshooting this,
do you have any XHTML test functions for this purpose?
I have a question on best Practice on this same question:
The Content is Multilingual HTML pages, some very large,
I want to add custom tags to it, so I can bind them to custom functions,
so a template will work great,
but I do not know what tags are being used in a page until after they
are read in,
that part seems real easy using messageResourceBundle,
or even WLocalizedStrings (I have never used this before), using tr or
resolveKey,
so my question is:
Is it faster to read a message bundle from an XML file or from a
Database?
I realize I can benchmark this and see for myself, but my guess is that
you have already done that,
but my question also deals with best Practices for Wt, and may not come
down to a benchmark.
If Database how do I read message resource bundle from a database,
It looks like I can feed a database query into messageResourceBundle
useBuiltin, I will start there,
or I guess I could assign the database query to WLocalizedStrings,
but what would be the Best Practice and do you have any examples or
clues?
Sorry if it reads long, I wanted to be clear.
Thanks
Flesher
On Mon, 2014-07-14 at 16:43 +0200, Koen Deforche wrote:
> Hey,
>
>
>
> Cannot widen() really means, as Stefan suggests, that somewhere you
> are messing up character formats. You should always use UTF-8 within a
> Wt application, unless you really need something else.
>
>
> As to memory size: if you are only shown static contents, there is no
> need for a widget to keep memory around. You should use WViewWidget to
> wrap a widget into a 'view-only' non-interactive widget which is
> discarded as soon as it's rendered.
>
>
> A WString::tr() function will by the way not store the actual resolved
> string, so if you really have huge strings that need to be displayed,
> it's worth considering whether they can be read from a message
> resource bundle (WLocalizedStrings can be specialized to resolve keys
> in a different way, e.g. reading from a database).
>
>
> Regards,
> koen
>
>
>
>
>
> 2014-07-13 3:11 GMT+02:00 Jeffrey Scott Flesher Gmail
> <jeffrey.scott.fles...@gmail.com>:
>
> More testing left me wondering about this problem, increasing
> the memory stopped the error in one part of the code, as well
> as crashing the page, but then it popped up in another part,
> and adding:
> Wt::WString::fromUTF8() as you suggested fixed that, as ~
> bottomPage = new Wt::WText(Wt::WString::fromUTF8("<div
> id='vpagebottom' class='vpagebottom' style='width:" +
> playVideo->pagebottomwidth + ";height:" +
> playVideo->pagebottomheight + ";'>" + playVideo->pagebottom +
> "</div>"), Wt::XHTMLUnsafeText
> the pageBottom is just html, and once it gets bigger then
> 50,000 it pops up as an error message without doing a
> fromUTF8,
> but ok before some limit like 45,119, but I get the message at
> 53,795, in some code, as I said,
> adding it to the database I did not have to do this once I
> added more memory,
> in fact I switched back to using string, after the upgrade,
> so this message is generated by Wt in an out of memory limit
> is hit (not sure if that is on purpose, in fact, I thought it
> might just be that programs on low memory start to do strange
> things),
> or by strings that are too large,
> so its clear I need to monitor the size of the string, but
> what size is too big?
>
> Is there a limit on the size a string (string::max_size) can
> be in Wt library?
>
> I never did loose any data, regardless of the message, after
> the memory upgrade that is, before it crashed the page, but
> doing this trick got rid of the message,
> so my question is, is this the best way to deal with strings
> that get up to lets say 50,000 to 100,000 or more?
>
> Basically I read in the html from an xml file, store it in a
> database (1 time only, or on updates), then get it using dbo,
> create a WText widget then bind it to a template.
>
> The Problem is that web pages can get long if you let them, so
> I need to figure out how long I can let them get, any idea how
> to combat this issue?
>
> Thanks
>
>
>
> On Fri, 2014-07-11 at 16:19 +0200, Stefan Ruppert wrote:
> > Hi,
> >
> > from my experience this is mostly a character encoding problem. I
> > noticed these errors by not using WString::fromUTF8() or if you use
> > latin1 strings as plain UTF8 strings.
> >
> > Within our projects all source code uses UTF8 encoding:
> >
> > WString s = "Müller"; // will issue such an error
> > WString s = WString::fromUTF8("Müller"); // is save
> >
> > See also WString::setDefaultEncoding().
> >
> > Regards,
> > Stefan
> >
> > Am 10.07.2014 23:20, schrieb Jeffrey Scott Flesher Gmail:
> > > I am reading in from an XML file, a very long string of HTML
> using RAPIDXML:
> > > std::string mypagebottom(nodeAttrib->value(),
> nodeAttrib->value_size());
> > > then I write it to the database:
> > > videoDb->pagebottom = mypagebottom;
> > > and even
> > > videoDb->pagebottom = mypagebottom.c_str();
> > > Originally I was using all strings, but tried to fix it by
> defining them
> > > as WString:
> > > Wt::WString pagebottom;
> > > Wt::Dbo::field(a, pagebottom, "pagebottom");
> > >
> > > It seems to have written the data, is this a problem that I can
> fix, if
> > > so how?
> > >
> > > I do not see an overloaded WString function that takes value and
> size
> > > like string does,
> > > is there a better way to write this that will avoid this message?
> > >
> > > Thanks
> > >
> > >
> > >
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