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Posted to users@tapestry.apache.org by James Sherwood <js...@romulin.com> on 2004/08/30 19:50:32 UTC
View the output stream from a component
I want to view the output stream to date from a component I create. Any
ideas how this is done?
Basically, I want to put a component at the end of the page, then when this
component is run, I want it to scan the entire page for a certian phrase.
Any help would be appreciated,
Thanks,
James
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Re: View the output stream from a component
Posted by James Sherwood <js...@romulin.com>.
Unfortunately I cannot use a filter due to certian restraints so I needed a
way to do it in tapestry.
Thanks for the help tho,
James
----- Original Message -----
From: "Erik Hatcher" <er...@ehatchersolutions.com>
To: "Tapestry users" <ta...@jakarta.apache.org>
Sent: Tuesday, August 31, 2004 11:27 AM
Subject: Re: View the output stream from a component
> On Aug 31, 2004, at 10:31 AM, James Sherwood wrote:
> > So I am lost again.
>
> I personally don't have time to code this up myself at the moment,
> sorry.
>
> > There has got to be a way to just see the html just before it is sent
> > to the
> > browser
>
> Again, this is what a servlet filter is for. Your original request
> made it sound like you needed to do something with Tapestry components,
> but you can do whatever you want with the actual HttpServletResponse
> before it is served to the browser using a filter. This has nothing to
> do with Tapestry though.
>
> Erik
>
> >
> > Any help would be GREATLY appreciated.
> >
> > Thanks,
> > James
> >
> >
> > ----- Original Message -----
> > From: "Erik Hatcher" <er...@ehatchersolutions.com>
> > To: "Tapestry users" <ta...@jakarta.apache.org>
> > Sent: Tuesday, August 31, 2004 10:39 AM
> > Subject: Re: View the output stream from a component
> >
> >
> >> On Aug 31, 2004, at 8:25 AM, James Sherwood wrote
> >>> I read the previous posts and the @Body sounds like the way to go but
> >>> I am
> >>> not sure exactly where to begin, any pointers or documents would be
> >>> greatly
> >>> appreciated.
> >>
> >> Your best bet is to dig into Body.java and see how it does its
> >> buffering (using a nested IMarkupWriter). Components that need to
> >> coordinate with @Body use the static Body.get(cycle) method. It's
> >> only
> >> a few lines of code, so you should be able to create a prototype of
> >> two
> >> components that coordinate in this fashion pretty easily.
> >>
> >> It seems lack a bit of a hack to scan for phrases in this fashion, but
> >> I'll leave you to decide that pragmatically :)
> >>
> >> Erik
> >>
> >>
> >>>
> >>>
> >>> James
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "Erik Hatcher" <er...@ehatchersolutions.com>
> >>> To: "Tapestry users" <ta...@jakarta.apache.org>
> >>> Sent: Monday, August 30, 2004 3:27 PM
> >>> Subject: Re: View the output stream from a component
> >>>
> >>>
> >>>> We discussed this just recently on the list. Check the archives in
> >>>> the
> >>>> last several weeks. The options are to 1) use a servlet filter or
> >>>> 2 )
> >>>> create a buffering controlling/wrapping component that can
> >>>> coordinate
> >>>> with the nested component in some way (see @Body for an example).
> >>>>
> >>>> Erik
> >>>>
> >>>>
> >>>> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
> >>>>
> >>>>> I want to view the output stream to date from a component I create.
> >>>>> Any
> >>>>> ideas how this is done?
> >>>>>
> >>>>> Basically, I want to put a component at the end of the page, then
> >>>>> when
> >>>>> this
> >>>>> component is run, I want it to scan the entire page for a certian
> >>>>> phrase.
> >>>>>
> >>>>>
> >>>>> Any help would be appreciated,
> >>>>>
> >>>>> Thanks,
> >>>>> James
> >>>>>
> >>>>>
> >>>>>
> >>>>> -------------------------------------------------------------------
> >>>>> --
> >>>>> To unsubscribe, e-mail:
> >>>>> tapestry-user-unsubscribe@jakarta.apache.org
> >>>>> For additional commands, e-mail:
> >>>>> tapestry-user-help@jakarta.apache.org
> >>>>
> >>>>
> >>>> --------------------------------------------------------------------
> >>>> -
> >>>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >>>> For additional commands, e-mail:
> >>>> tapestry-user-help@jakarta.apache.org
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >>> For additional commands, e-mail:
> >>> tapestry-user-help@jakarta.apache.org
> >>
> >>
> >> ---------------------------------------------------------------------
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> >>
> >>
> >
> >
> >
> > ---------------------------------------------------------------------
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>
>
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Re: View the output stream from a component
Posted by James Sherwood <js...@romulin.com>.
Problem solved for anyone that has a similar problem:)
I took the NestedHTMLWriter out of the tapestry jar and put it in my
project.
Added a setter and getter to the buffer.
Now in the new body component I created(just a copy of Body) I can
manipulate the buffer as I see fit:)
Thanks for the help leading me to this Erik!
nested = writer.getNestedWriter();
renderBody(nested, cycle);
*******************************
I can now get and set the buffer here before it is flushed to the parent on
close below,
manipulating it as I see fit
*******************************
// Write the script (i.e., just before the <body> tag).
// If an onLoad event handler was needed, its name is
// returned.
onLoadName = writeScript();
// Start the body tag.
writer.println();
writer.begin("body");
generateAttributes(writer, cycle);
if (onLoadName != null)
writer.attribute("onLoad", "javascript:" + onLoadName + "();");
// Close the nested writer, which dumps its buffered content
// into its parent.
nested.close();
writer.end(); // <body>
----- Original Message -----
From: "Erik Hatcher" <er...@ehatchersolutions.com>
To: "Tapestry users" <ta...@jakarta.apache.org>
Sent: Tuesday, August 31, 2004 11:27 AM
Subject: Re: View the output stream from a component
> On Aug 31, 2004, at 10:31 AM, James Sherwood wrote:
> > So I am lost again.
>
> I personally don't have time to code this up myself at the moment,
> sorry.
>
> > There has got to be a way to just see the html just before it is sent
> > to the
> > browser
>
> Again, this is what a servlet filter is for. Your original request
> made it sound like you needed to do something with Tapestry components,
> but you can do whatever you want with the actual HttpServletResponse
> before it is served to the browser using a filter. This has nothing to
> do with Tapestry though.
>
> Erik
>
> >
> > Any help would be GREATLY appreciated.
> >
> > Thanks,
> > James
> >
> >
> > ----- Original Message -----
> > From: "Erik Hatcher" <er...@ehatchersolutions.com>
> > To: "Tapestry users" <ta...@jakarta.apache.org>
> > Sent: Tuesday, August 31, 2004 10:39 AM
> > Subject: Re: View the output stream from a component
> >
> >
> >> On Aug 31, 2004, at 8:25 AM, James Sherwood wrote
> >>> I read the previous posts and the @Body sounds like the way to go but
> >>> I am
> >>> not sure exactly where to begin, any pointers or documents would be
> >>> greatly
> >>> appreciated.
> >>
> >> Your best bet is to dig into Body.java and see how it does its
> >> buffering (using a nested IMarkupWriter). Components that need to
> >> coordinate with @Body use the static Body.get(cycle) method. It's
> >> only
> >> a few lines of code, so you should be able to create a prototype of
> >> two
> >> components that coordinate in this fashion pretty easily.
> >>
> >> It seems lack a bit of a hack to scan for phrases in this fashion, but
> >> I'll leave you to decide that pragmatically :)
> >>
> >> Erik
> >>
> >>
> >>>
> >>>
> >>> James
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "Erik Hatcher" <er...@ehatchersolutions.com>
> >>> To: "Tapestry users" <ta...@jakarta.apache.org>
> >>> Sent: Monday, August 30, 2004 3:27 PM
> >>> Subject: Re: View the output stream from a component
> >>>
> >>>
> >>>> We discussed this just recently on the list. Check the archives in
> >>>> the
> >>>> last several weeks. The options are to 1) use a servlet filter or
> >>>> 2 )
> >>>> create a buffering controlling/wrapping component that can
> >>>> coordinate
> >>>> with the nested component in some way (see @Body for an example).
> >>>>
> >>>> Erik
> >>>>
> >>>>
> >>>> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
> >>>>
> >>>>> I want to view the output stream to date from a component I create.
> >>>>> Any
> >>>>> ideas how this is done?
> >>>>>
> >>>>> Basically, I want to put a component at the end of the page, then
> >>>>> when
> >>>>> this
> >>>>> component is run, I want it to scan the entire page for a certian
> >>>>> phrase.
> >>>>>
> >>>>>
> >>>>> Any help would be appreciated,
> >>>>>
> >>>>> Thanks,
> >>>>> James
> >>>>>
> >>>>>
> >>>>>
> >>>>> -------------------------------------------------------------------
> >>>>> --
> >>>>> To unsubscribe, e-mail:
> >>>>> tapestry-user-unsubscribe@jakarta.apache.org
> >>>>> For additional commands, e-mail:
> >>>>> tapestry-user-help@jakarta.apache.org
> >>>>
> >>>>
> >>>> --------------------------------------------------------------------
> >>>> -
> >>>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >>>> For additional commands, e-mail:
> >>>> tapestry-user-help@jakarta.apache.org
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >>> For additional commands, e-mail:
> >>> tapestry-user-help@jakarta.apache.org
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> >>
> >>
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
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>
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Re: View the output stream from a component
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
On Aug 31, 2004, at 10:31 AM, James Sherwood wrote:
> So I am lost again.
I personally don't have time to code this up myself at the moment,
sorry.
> There has got to be a way to just see the html just before it is sent
> to the
> browser
Again, this is what a servlet filter is for. Your original request
made it sound like you needed to do something with Tapestry components,
but you can do whatever you want with the actual HttpServletResponse
before it is served to the browser using a filter. This has nothing to
do with Tapestry though.
Erik
>
> Any help would be GREATLY appreciated.
>
> Thanks,
> James
>
>
> ----- Original Message -----
> From: "Erik Hatcher" <er...@ehatchersolutions.com>
> To: "Tapestry users" <ta...@jakarta.apache.org>
> Sent: Tuesday, August 31, 2004 10:39 AM
> Subject: Re: View the output stream from a component
>
>
>> On Aug 31, 2004, at 8:25 AM, James Sherwood wrote
>>> I read the previous posts and the @Body sounds like the way to go but
>>> I am
>>> not sure exactly where to begin, any pointers or documents would be
>>> greatly
>>> appreciated.
>>
>> Your best bet is to dig into Body.java and see how it does its
>> buffering (using a nested IMarkupWriter). Components that need to
>> coordinate with @Body use the static Body.get(cycle) method. It's
>> only
>> a few lines of code, so you should be able to create a prototype of
>> two
>> components that coordinate in this fashion pretty easily.
>>
>> It seems lack a bit of a hack to scan for phrases in this fashion, but
>> I'll leave you to decide that pragmatically :)
>>
>> Erik
>>
>>
>>>
>>>
>>> James
>>>
>>>
>>> ----- Original Message -----
>>> From: "Erik Hatcher" <er...@ehatchersolutions.com>
>>> To: "Tapestry users" <ta...@jakarta.apache.org>
>>> Sent: Monday, August 30, 2004 3:27 PM
>>> Subject: Re: View the output stream from a component
>>>
>>>
>>>> We discussed this just recently on the list. Check the archives in
>>>> the
>>>> last several weeks. The options are to 1) use a servlet filter or
>>>> 2 )
>>>> create a buffering controlling/wrapping component that can
>>>> coordinate
>>>> with the nested component in some way (see @Body for an example).
>>>>
>>>> Erik
>>>>
>>>>
>>>> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
>>>>
>>>>> I want to view the output stream to date from a component I create.
>>>>> Any
>>>>> ideas how this is done?
>>>>>
>>>>> Basically, I want to put a component at the end of the page, then
>>>>> when
>>>>> this
>>>>> component is run, I want it to scan the entire page for a certian
>>>>> phrase.
>>>>>
>>>>>
>>>>> Any help would be appreciated,
>>>>>
>>>>> Thanks,
>>>>> James
>>>>>
>>>>>
>>>>>
>>>>> -------------------------------------------------------------------
>>>>> --
>>>>> To unsubscribe, e-mail:
>>>>> tapestry-user-unsubscribe@jakarta.apache.org
>>>>> For additional commands, e-mail:
>>>>> tapestry-user-help@jakarta.apache.org
>>>>
>>>>
>>>> --------------------------------------------------------------------
>>>> -
>>>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>>>> For additional commands, e-mail:
>>>> tapestry-user-help@jakarta.apache.org
>>>>
>>>>
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>>> For additional commands, e-mail:
>>> tapestry-user-help@jakarta.apache.org
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>>
>>
>
>
>
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Re: View the output stream from a component
Posted by James Sherwood <js...@romulin.com>.
Thanks for the help, this is where I am:
I looked into the body and found
***************************************
nested = writer.getNestedWriter();
renderBody(nested, cycle);
// Write the script (i.e., just before the <body> tag).
// If an onLoad event handler was needed, its name is
// returned.
onLoadName = writeScript();
// Start the body tag.
writer.println();
writer.begin("body");
generateAttributes(writer, cycle);
if (onLoadName != null)
writer.attribute("onLoad", "javascript:" + onLoadName + "();");
// Close the nested writer, which dumps its buffered content
// into its parent.
nested.close();
writer.end(); // <body>
***************************************
I know it flushes the nested to the parent writer with the nested.close();
The problem is, I cannot figure out how to see what it is flushing(if thats
possible).
I also looked into the renderBody() of AbstractComponent
***************************************
public void renderBody(IMarkupWriter writer, IRequestCycle cycle) throws
RequestCycleException
{
for (int i = 0; i < wrappedCount; i++)
wrapped[i].render(writer, cycle);
}
***************************************
The wall I ran into here is the .render(writer,cycle) just leads me to the
interface of IRender
It is overwridden in AbstractComponent but it seems to just loop back to
the Body with
renderComponent(writer, cycle);
So I am lost again.
I also tried to look into the servlet by checking the doService and trying
to get the Whole page from the response but couldnt find anything there:(
There has got to be a way to just see the html just before it is sent to the
browser
Any help would be GREATLY appreciated.
Thanks,
James
----- Original Message -----
From: "Erik Hatcher" <er...@ehatchersolutions.com>
To: "Tapestry users" <ta...@jakarta.apache.org>
Sent: Tuesday, August 31, 2004 10:39 AM
Subject: Re: View the output stream from a component
> On Aug 31, 2004, at 8:25 AM, James Sherwood wrote
> > I read the previous posts and the @Body sounds like the way to go but
> > I am
> > not sure exactly where to begin, any pointers or documents would be
> > greatly
> > appreciated.
>
> Your best bet is to dig into Body.java and see how it does its
> buffering (using a nested IMarkupWriter). Components that need to
> coordinate with @Body use the static Body.get(cycle) method. It's only
> a few lines of code, so you should be able to create a prototype of two
> components that coordinate in this fashion pretty easily.
>
> It seems lack a bit of a hack to scan for phrases in this fashion, but
> I'll leave you to decide that pragmatically :)
>
> Erik
>
>
> >
> >
> > James
> >
> >
> > ----- Original Message -----
> > From: "Erik Hatcher" <er...@ehatchersolutions.com>
> > To: "Tapestry users" <ta...@jakarta.apache.org>
> > Sent: Monday, August 30, 2004 3:27 PM
> > Subject: Re: View the output stream from a component
> >
> >
> >> We discussed this just recently on the list. Check the archives in
> >> the
> >> last several weeks. The options are to 1) use a servlet filter or 2 )
> >> create a buffering controlling/wrapping component that can coordinate
> >> with the nested component in some way (see @Body for an example).
> >>
> >> Erik
> >>
> >>
> >> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
> >>
> >>> I want to view the output stream to date from a component I create.
> >>> Any
> >>> ideas how this is done?
> >>>
> >>> Basically, I want to put a component at the end of the page, then
> >>> when
> >>> this
> >>> component is run, I want it to scan the entire page for a certian
> >>> phrase.
> >>>
> >>>
> >>> Any help would be appreciated,
> >>>
> >>> Thanks,
> >>> James
> >>>
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >>> For additional commands, e-mail:
> >>> tapestry-user-help@jakarta.apache.org
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> >> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> >>
> >>
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
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>
>
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Re: View the output stream from a component
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
On Aug 31, 2004, at 8:25 AM, James Sherwood wrote
> I read the previous posts and the @Body sounds like the way to go but
> I am
> not sure exactly where to begin, any pointers or documents would be
> greatly
> appreciated.
Your best bet is to dig into Body.java and see how it does its
buffering (using a nested IMarkupWriter). Components that need to
coordinate with @Body use the static Body.get(cycle) method. It's only
a few lines of code, so you should be able to create a prototype of two
components that coordinate in this fashion pretty easily.
It seems lack a bit of a hack to scan for phrases in this fashion, but
I'll leave you to decide that pragmatically :)
Erik
>
>
> James
>
>
> ----- Original Message -----
> From: "Erik Hatcher" <er...@ehatchersolutions.com>
> To: "Tapestry users" <ta...@jakarta.apache.org>
> Sent: Monday, August 30, 2004 3:27 PM
> Subject: Re: View the output stream from a component
>
>
>> We discussed this just recently on the list. Check the archives in
>> the
>> last several weeks. The options are to 1) use a servlet filter or 2 )
>> create a buffering controlling/wrapping component that can coordinate
>> with the nested component in some way (see @Body for an example).
>>
>> Erik
>>
>>
>> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
>>
>>> I want to view the output stream to date from a component I create.
>>> Any
>>> ideas how this is done?
>>>
>>> Basically, I want to put a component at the end of the page, then
>>> when
>>> this
>>> component is run, I want it to scan the entire page for a certian
>>> phrase.
>>>
>>>
>>> Any help would be appreciated,
>>>
>>> Thanks,
>>> James
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>>> For additional commands, e-mail:
>>> tapestry-user-help@jakarta.apache.org
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>>
>>
>
>
>
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---------------------------------------------------------------------
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Re: View the output stream from a component
Posted by James Sherwood <js...@romulin.com>.
I read the previous posts and the @Body sounds like the way to go but I am
not sure exactly where to begin, any pointers or documents would be greatly
appreciated.
James
----- Original Message -----
From: "Erik Hatcher" <er...@ehatchersolutions.com>
To: "Tapestry users" <ta...@jakarta.apache.org>
Sent: Monday, August 30, 2004 3:27 PM
Subject: Re: View the output stream from a component
> We discussed this just recently on the list. Check the archives in the
> last several weeks. The options are to 1) use a servlet filter or 2 )
> create a buffering controlling/wrapping component that can coordinate
> with the nested component in some way (see @Body for an example).
>
> Erik
>
>
> On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
>
> > I want to view the output stream to date from a component I create. Any
> > ideas how this is done?
> >
> > Basically, I want to put a component at the end of the page, then when
> > this
> > component is run, I want it to scan the entire page for a certian
> > phrase.
> >
> >
> > Any help would be appreciated,
> >
> > Thanks,
> > James
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
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>
>
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Re: View the output stream from a component
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
We discussed this just recently on the list. Check the archives in the
last several weeks. The options are to 1) use a servlet filter or 2 )
create a buffering controlling/wrapping component that can coordinate
with the nested component in some way (see @Body for an example).
Erik
On Aug 30, 2004, at 1:50 PM, James Sherwood wrote:
> I want to view the output stream to date from a component I create. Any
> ideas how this is done?
>
> Basically, I want to put a component at the end of the page, then when
> this
> component is run, I want it to scan the entire page for a certian
> phrase.
>
>
> Any help would be appreciated,
>
> Thanks,
> James
>
>
>
> ---------------------------------------------------------------------
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