I've had some experience with Java and Javascript and searching this forum has helped me tremendously, but haven't been able to find this exact problem explicitly. In a nutshell: I want to call a java class straight from Javascript i.e. use a Java class in Javascript without OBJECT or APPLET.
Here's what what I'm experimenting with:
function screenSize() {
alert("Screen Dimension\n" + " width:"
+ java.awt.Toolkit.getDefaultToolkit().getScreenSize().width
+ " height:" + java.awt.Toolkit.getDefaultToolkit().getScreenSize().height);
}
which is an example given on http://www.rgagnon.com/javadetails/java-0170.html. This is hooked to a button on a page. When clicking the button I (in essence) get:
A Runtime Error has occured at line 35: 'java' is undefined.
I'm assuming that my path is incorrect or missing and there's a PATH or CLASSPATH or something I've overlooked.
I'd eventually like to move the javascript into a bookmarklet so that the user will be able to click a favorite on the appropriate page and have magic happen because of my own java classes manipulating the data from the screen. For various reasons political and technical, I'm stuck using IE6-7 and have to work with scraping the web page in the browser and processing it on the client -- no sever side action for me! I can assume that a JRE 6 will be available.
Is it a path issue? Is what I want even possible and if so, how? And how will packages work with all this?
Any advice or examples will be muchly appreciated.
The tip shown at Real's HowTo used to work, but doesn't anymore. Insert an applet and define public methods to interact with.
In the link you referenced, did you notice this information at the top?
On IE4 or better, you can't call java.* methods directly from Javascript or Jscript.
It goes on to explain that an Applet is needed. Of course, IE4 is rather old, not sure how much of this is still relevant. Good luck!
Related
I wrote a TestComplete extension to update Keyword-Test signature from TestComplete in to an external tool.
However, this action takes very long time. That's why I need to change the cursor from arrow to hour glass, and back to arrow after action is done.
The module doing the opperation is writen in js.
If I try to use the following code, suggested by TestComplete code completition
Win32API.SetCursor(Win32API.IDC_WAIT);
I got the error "Object expected". I.e., the js in the TestComplete extension does not know About Win32API object, despite the code completition suggestion.
Ommiting the Win32API. prefix has the same effect. Trying to create appropiate object via
new ActiveXObject("SomeKindClass")
fails, because I am not able to find appropiate name for the class containing some methode to change cursor. (I tryed, Microsoft.Win32, Microsoft.Win32API, Win32, Win32API and some other non-sence names...)
SmartBears description on writing extentions seems to contain no hint about changing the cursor in a js ScriptExtension.
Please appologize, if I overlook it.
Any suggestions are appreciated. Thanx in advice for your F1!
Edit:
A possible way to solve this is described bellow. However, I am not able to follow it to the end, because of lack of time. Perhaps someone can confirm or deny the correctness. That' would be great.
Steps:
Create a new vbs module in the ScriptExtension (or extend an existing one if any).
In
the init method of vbs module, load user32.dll, create prototypes for
the LoadCursor and CreateCursor methods of user32.dll. (See Tutorial)
You call those methods in your setCursor2* methods.
Declare the setCursor2* methods in the Description.xml as method in RuntimeObject of your namespace (See Script Extension Description file)
Call the methods in the js module YourNameSpace.setCursor2Hourglass(); and YourNameSpace.setCursor2Arrow(); respectively.
It is impossible to show an hour glass from a TestComplete extension.
The reason is, following quote, that comes from https://support.smartbear.com/testcomplete/docs/working-with/extending/script/creating/specifics.htm.
"If your design-time action performs actions against the TestComplete
main window (for example, minimizes the window, changes the window
size and position, and so on), an error will occur. This happens due
to specifics of thread organization in TestComplete."
I guess, the "on so on" part includes changing the cursor…
I am trying to build a puzzle game using HTML & JS. This is going to be a standalone HTML page. There isn't going to be a server side for this application.
Obviously, the game has an answer which the application will create at start time. Now, I wish to make this variable completely hidden i.e., not just hidden from user's view but also inaccessible to the user, even if he tries to read the page through Chrome's Developer Tools or such debug tools.
I'm looking for a solution using HTML5, JS ECMAScript 5+ & jQuery.
I remember reading something about Native HTML code (used for HTML File elements) which cannot be rendered/read even through Dev Tools. Is this any help?
Is there any way or strategy to achieve this?
NOTE: I am aware of <input type="hidden">. But that doesn't serve my purpose.
EDIT: As part of the game, the user makes attempts and the application needs to validate the user's input against this somehow-user-hidden answer variable. At this point, I believe there is no solution that's going to be completely airtight in the given constraints. Hence, I'm pursuing this from an academic interest. Does anyone have any other answers ?
Prehash your answer, hard code that into your page.
Then, when they submit their answer, run through whatever hashing pattern you did before hand, and compare the result.
It could theoretically be brute forced, of course.... if you had a few hundred years.
Javascript implementations of:
SHA-1: http://www.webtoolkit.info/javascript-sha1.html
SHA-256: http://www.webtoolkit.info/javascript-sha256.html
MD5: http://www.webtoolkit.info/javascript-md5.html
Edit:
An example would be:
Pattern: SHA-1(SHA-1(SHA-1(answer + salt)))
Salt: 982qx17wef7ddsbtxaewnsdufs (make something up, load it as an input type='hidden')
Result: (load it as an input type='hidden')
Request the answer
If SHA-1(SHA-1(SHA-1(attempt + salt))) === Result, they got it correct
Your can hash your values using MD5.
https://github.com/blueimp/JavaScript-MD5#client-side
Using the Firefox Web Console (which can be brought up with control shift k ) I can easily access things like flowplayers.
jwplayer().play(), for example
The console even offers autocompletion suggestions for it.
What does the console do to be in that kind of, for my lack of words and knowledge, namespace?
I tried things like
content.document.getElementsByName('flvplayer').item(0)
Using Pentadactyls JS intepreter (accessed with :js)
This does seem to give me the player handle, or at least it prints out a <html:object> which corresponds to it.
Appending a .play() to it doesn't work, though. It's not a function.
What do I need to do to emulate the Web-Consoles way of doing it?
I realize that this might be a very spoonfeedy question, so if that is not acceptable then I'd still appreciate to get pointed into directions where I could possibly discover the solution myself by reading.
I tried searching for it myself but the terms seem to be quite ambiguous and I usually get results with people talking about their own sites, with scripts running inside of that 'namespace', not from outside like I am trying to do.
(Unless I am wrong about the concepts of inside and outside here.)
Cheers~~
The following command works for me; it defines the command ypl which
plays the YouTube video on the page
command! ypl open javascript:(function()
{content.document.getElementById('movie_player').playVideo()})()
Another example: this defines the ytr command which takes an integer argument and moves the current time position of the video by that amount in seconds
command! -nargs=1 ytr open javascript:(function(){var vid =
content.document.getElementById('movie_player'); vid.seekTo(vid.getCurrentTime() +
(<args>), true)})()
I hope that helps a bit. When I wrote those a while ago I may have tried :js and if it didn't work used :open javascript:....
I'm trying to use Python to download a voice file (mp3) from this site:
I've tried to use mechanize and twill but I haven't got the proper result. I've heard about selenium as well. Anyway, I don't even know if it makes sense technically (mechanize + Javascript).
I was looking for an answer and finally I've found this solution.
It seems like a similar problem to mine but I have absoutely no idea what should I put instead of the 4th line.
If you have any proposition (maybe completely different to mine) I'll be glad to see it.
(Moving to answer to get more space)
Thanks for pointing me to selenium, I didn't know that and it looks cool; anyways: I had a quick look and the js seems to fire an ajax request, that yields no apparent result -- I guess the audio transfer is done some way in the background via flash or so; anyways: what about using the service they offer: developer.ivona.com instead of trying hacking your webservice out of the demo interface..?
Anyways, here it is the hacked web-service you asked for:
This is the URL you want to GET:
"http://www.ivona.com/voicetest.php?rtr=1&t2r=%(the_text)s..&v2r=dXNfc2FsbGk.&lang=us" % dict(
the_text=base64.b64encode("Hello, world!"),
the_voice=base64.b64encode("us_salli"),
)
You can test that with, for example, mplayer:
mplayer "http://www.ivona.com/voicetest.php?rtr=1&t2r=SGVsbG8sIHdvcmxkIQ==..&v2r=dXNfc2FsbGk.&lang=us"
And, from Python, use urllib to retrieve and store somewhere.
Beware that, since this is an unauthorized use, you might get blocked / incur in legal issues / etc. -- don't use in a production application!
I need to link to a page that uses javascript to create the appearance of different pages. Each of the links on the page I am pointing to calls a javascript function that produces the "new" page. So, if I just link to the page, I get the default configuration. But what I need to link to is a particular configuration after the js function has run.
At first I thought I would be able to append the function to the url, but apparently that functionality is not supported for security reasons (is this correct?). Is it possible to post the values?
Does anyone know how I can display the correct configuration?
In the general case, no, it's not possible, which is why these sort of JavaScript-only pages are an inaccessible, unusable total pain in the neck and people should stop creating them, the idiots.
If you are lucky and the site you're talking about has actually Done It Properly, then they'll have used #fragment navigation, so when you click a link it does a history-able and bookmark-able navigation, updating the URL to one with a #something at the end that you can use to navigate back there. If you're really lucky, there might even be a fallback URL for non-JavaScript browsers that you could link to. But more often all there is is a JS function, which you can't link to or invoke outside of that site, leaving you quite out of luck should you want to deep-link anything.
(Did we learn nothing from the <frame> fiasco, guys? All you trendy webmasters hacking up clever-clever swooshy jQuery-animated load()-powered multiple-pages-in-one sites are churning out rubbish that is no better than the frame-addled worst of the Netscape 3 era. Stop it. Seriously.)
Okay, I was given the solution by a friend. It seems I should answer my own question. In fact, I felt a little silly once I saw how simple the solutions was. I just forgot how to plant "posts" in a URL. It seems the question itself was erroneous.
All I really needed to do was set some Javascript variables in a page I don't own. Solution looks something like this.
http://www.apage.com/control.aspx?var1=someVal&var2=someVal...&varn=someVal
Thanks to those who responded.
The owner of the page could do you a favour and provide a mechanism to run functions depending on a value in the querystring.
Otherwise there may be something that can be done with ajax but it could be messy.