gwt dev blog

Basically GAE is a web-hosting with (currently) two platforms available -

Python and Java, and with "kinda weird" database to build upon.

On Wed, Apr 21, 2010 at 4:52 PM, Wooble <geoffspear@gmail.com> wrote:

>

>

> On Apr 21, 9:47 am, Matlab <rizvan.asga…@yahoo.com> wrote:

> > Hi friends,

> > I’m new at this forum and hope that everything will be ‘OK’…

> >

> > My question is that what is the relationship between GAE and GWT?

> >

> > Thanks in advance,

> > Matlab

>

> They’re both made by Google and they both have something to do with

> the web. Other than that, there’s no relationship. You can certainly

> use GAE as the backend for a GWT application, but it’s no different

> than using any other host.

>

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Basically GAE is a web-hosting with (currently) two platforms available – Python and Java, and with "kinda weird" database to build upon.

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i’ve deployed and am getting messages rolling back, to keep waiting:

Will check again in 16 seconds.

Checking if new version is ready to serve.

Will check again in 32 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

Checking if new version is ready to serve.

Will check again in 60 seconds.

anyone know how to unstick?

- martin

- id: xinbox-crm

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Hi John,

are you starting the remote_shell from within the bloggart directory?

I don’t know how the prompt of your console is build, but at first

sight it looks like your working in your home directory.

Regards,

Andi

On Wed, Apr 21, 2010 at 2:45 AM, John <johnnytee@gmail.com> wrote:

> I’m using the remote api to migrate to nick johnson’s bloggart. I can

> log in, but when I try to import a module it says not found.

>

> Here’s my console output:

> john-turners-macbook-pro:~ johnnytee$ PYTHONPATH=. remote_api_shell.py

> john-turner

> /Applications/GoogleAppEngineLauncher.app/Contents/Resources/

> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/

> google/appengine/ext/remote_api/remote_api_stub.py:64:

> DeprecationWarning: the sha module is deprecated; use the hashlib

> module instead

>  import sha

> /Applications/GoogleAppEngineLauncher.app/Contents/Resources/

> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/

> google/appengine/tools/dev_appserver_login.py:33: DeprecationWarning:

> the md5 module is deprecated; use hashlib instead

>  import md5

> Email: johnnytee@gmail.com

> Password:

> App Engine remote_api shell

> Python 2.6.1 (r261:67515, Feb 11 2010, 00:51:29)

> [GCC 4.2.1 (Apple Inc. build 5646)]

> The db, users, urlfetch, and memcache modules are imported.

> john-turner> import migrate

> Traceback (most recent call last):

>  File "<console>", line 1, in <module>

> ImportError: No module named migrate

> john-turner>

>

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Hi all,

I have a somewhat small problem with RichTextArea in Firefox.

When the RichTextArea Formatter calls toggleBold and the like, the

html colde that gets added to the text is styled via CSS. Instead of

"<b>sometext </b>some other text"

we get

"<span style="font-weight: bold;">some text </span>some other text".

The Formatter make execCommand() calls for the formatting, and in

Firefox by default the styleWithCSS is set as true.

Is there an easy way to change the value of styleWithCSS to false in

order to not format text with CSS? I’ve made some attempts to change

styleWithCSS to false and failed miserably.

Thanks in advance,

Saül.

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[Sorry in advance for the lengthy post, I just posted this question

over on stack overflow and copy/pasted the question here for more

visibilty, so this is formatted with markup and all links referenced

are at the bottom of the post]

I developed a web app using GWT about 2 years ago, since then the

application has evolved. In its current state it relies on fetching a

single XML file and parsing the information from it. Overall this

works great. A requirement of this app is that it needs to be able to

be ran from the filesystem (file:///..) as well as the traditional

model of running from a webserver (http://…)

Fetching this file from a webserver works exactly as expected using a

[RequestBuilder][1] object. When running the app from the filesystem

Firefox, Opera, Safari, and Chrome all behave as expected. When

running the app from the filesystem using IE7 or IE8 the

[RequestBuilder.send()][2] call fails, the information about the error

suggests that there is a problem accessing the file due to violating

the [same origin policy][3].

The app worked as expected in IE6 but not in IE7 or IE8.

So I looked at the source code of [RequestBuilder.java][4] and saw

that the actual request was being executed with an XMLHttpRequest GWT

object. So I looked at the source code for [XMLHttpRequest.java][5]

and found out some information.

Here is the code (starts at line 83 in XMLHttpRequest.java)

public static native XMLHttpRequest create() /*-{

if ($wnd.XMLHttpRequest) {

return new XMLHttpRequest();

} else {

try {

return new ActiveXObject(‘MSXML2.XMLHTTP.3.0′);

} catch (e) {

return new ActiveXObject("Microsoft.XMLHTTP");

}

}

}-*/;

So basically if an XMLHttpRequest cannot be created (like in IE6

because it is not available) an ActiveXObject is used instead.

I read up a little bit more on the IE implementation of

XMLHttpRequest, and it appears that it is only supported for

interacting with files on a webserver.

I found a setting in IE8 (Tools->Internet Options->Advanced->Security-

>Enable native XMLHTTP support), when I uncheck this box my app

works. I assume this is because I am more of less telling IE to not

use their implementation of XmlHttpRequest, so GWT just uses an

ActiveXObject because it doesn’t think the native XmlHttpRequest is

available.

This fixes the problem, but is hardly a long term solution.

I can currently catch a failed send request and verify that it was

trying to fetch the XML file from the filesystem using normal GWT.

What I would like to do in this case is catch the IE7 and IE8 case and

have them use a ActiveXObject instead of a native XmlHttpRequest

object.

There was a posting on the GWT google group that had a supposed

solution for this problem ([link][6]). Looking at it I can tell that

it was created for an older version of GWT. I am using the latest

release and think that this is more or less what I would like to do

(use [GWT deferred binding][7] to detect a specific browser type and

run my own implementation of XMLHttpRequest.java in place of the built

in GWT implementation).

Here is the code that I am trying to use

package com.mycompany.myapp.client;

import com.google.gwt.xhr.client.XMLHttpRequest;

public class XMLHttpRequestIE7or8 extends XMLHttpRequest

{

// commented out the "override" so that eclipse and the ant

build script don’t throw errors

//@Override

public static native XMLHttpRequest create()

/*-{

try

{

return new ActiveXObject(‘MSXML2.XMLHTTP.3.0′);

}

catch (e)

{

return new ActiveXObject("Microsoft.XMLHTTP");

}

}-*/;

// have an empty protected constructor so the ant build script

doesn’t throw errors

// the actual XMLHttpRequest constructor is empty as well so

this shouldn’t cause any problems

protected XMLHttpRequestIE7or8()

{

}

};

And here are the lines that I added to my module xml

<replace-with

class="com.mycompany.myapp.client.XMLHttpRequestIE7or8">

<when-type-is class="com.google.gwt.xhr.client.XMLHttpRequest"/

>

<any>

<when-property-is name="user.agent" value="ie7" />

<when-property-is name="user.agent" value="ie8" />

</any>

</replace-with>

From what I can tell this should work, but my code never runs.

Does anyone have any idea of what I am doing wrong?

Should I not do this via deferred binding and just use native

javascript when I catch the fail case instead?

Is there a different way of approaching this problem that I have not

mentioned?

All replies are welcome.

[1]: http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/http/client/RequestBuilder.html

[2]: http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/http/client/RequestBuilder.html#send%28%29

[3]: http://en.wikipedia.org/wiki/Same_origin_policy

[4]: http://code.google.com/p/google-web-toolkit/source/browse/releases/2.0/user/src/com/google/gwt/http/client/RequestBuilder.java

[5]: http://code.google.com/p/google-web-toolkit/source/browse/releases/2.0/user/src/com/google/gwt/xhr/client/XMLHttpRequest.java

[6]: http://groups.google.com/group/google-web-toolkit/browse_thread/thread/3a3935fe1534a486

[7]: http://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsDeferred.html

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