[Project_owners] evaluate html document by XMLHttpRequest
Foreningen Selvet - Jesper Staun Hansen
jesper at selvet.dk
Fri Aug 10 12:25:26 PDT 2007
Tried this without any result:
var iframe = document.createElement("IFRAME");
iframe.style.visibility = "hidden";
iframe.style.position = "absolute";
document.body.appendChild(iframe);
iframe.docShell.allowJavascript = false;
iframe.docShell.allowAuth = false;
iframe.docShell.allowPlugins = false;
iframe.docShell.allowMetaRedirects = false;
iframe.docShell.allowSubframes = false;
iframe.docShell.allowImages = false;
With the error:
Error: iframe.docShell has no properties
Any hints?
Foreningen Selvet - Jesper Staun Hansen wrote:
> Cant seem to find documentation on that?
>
> eric.jung at yahoo.com wrote:
>
>> Take a look at how Myk did it with microsummaries:
>> http://mxr.mozilla.org/seamonkey/source/browser/components/microsummaries/src/nsMicrosummaryService.js#2089
>> XHR isn't used, but the iframe trick is used with lots of subtleties;
>> e.g. turning off javascript and images in the iframe (to reduce
>> network traffic), preventing about:blank from loading in the iframe, etc.
>>
>> ----- Original Message ----
>> From: Foreningen Selvet - Jesper Staun Hansen <jesper at selvet.dk>
>> To: Mozdev Project Owners List <project_owners at mozdev.org>
>> Sent: Friday, August 10, 2007 1:56:28 PM
>> Subject: Re: [Project_owners] evaluate html document by XMLHttpRequest
>>
>> Discard from this question.
>> I found the solution! Yay!
>>
>> Foreningen Selvet - Jesper Staun Hansen wrote:
>>
>>> I am getting really impatient about this problem as I cant seem to
>>>
>> solve
>>
>>> it :O!
>>> Does anyone have a complete script I can look at using Greasymonkeys
>>> version of the XMLHttpRequest downloader "and put it in a iframe and
>>> evaluate it" script.
>>>
>>> I'm running out of ideas here.
>>>
>>>
>>> Greets.
>>>
>>> Tommi Rautava wrote:
>>>
>>>
>>>> The DOMContentLoaded event is sent after close(), so it should be
>>>> enough if the listener is added just before
>>>> iframe.contentDocument.close().
>>>>
>>>> 2007/8/8, eric.jung at yahoo.com <eric.jung at yahoo.com>:
>>>>
>>>>
>>>>
>>>>> Interesting. The only comment I'll make is you should add
>>>>> iframe.contentDocument.addEventListener() *before* writing
>>>>> the responseText into the IFRAME otherwise, under race conditions,
>>>>>
>> I could
>>
>>>>> see you missing the DOMContentLoaded event.
>>>>>
>>>>>
>>>>>
>>>>> ----- Original Message ----
>>>>> From: Foreningen Selvet - Jesper Staun Hansen <jesper at selvet.dk>
>>>>> To: Mozdev Project Owners List <project_owners at mozdev.org>
>>>>> Sent: Wednesday, August 8, 2007 7:21:47 AM
>>>>> Subject: Re: [Project_owners] evaluate html document by XMLHttpRequest
>>>>>
>>>>> So, the trick here would be to throw all of the code into iframe and
>>>>> define it as text/html and then parse it?
>>>>> Guess I think I got it right.
>>>>>
>>>>>
>>>>> Tommi Rautava wrote:
>>>>>
>>>>>
>>>>>
>>>>>> The problem is that you cannot parse HTML with XML parser. I
>>>>>>
>> struggled
>>
>>>>>> with the same problem some time ago and the best solution I have
>>>>>>
>> found
>>
>>>>>> so far is the HTML parser example made by Aaron Boodman (the original
>>>>>> author of Greasemonkey):
>>>>>> http://youngpup.net/userscripts/htmlparserexample.user.js
>>>>>>
>>>>>> br, Tom
>>>>>>
>>>>>> 2007/8/7, Foreningen Selvet - Jesper Staun Hansen <jesper at selvet.dk>:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Hello.
>>>>>>>
>>>>>>>
>>>>>>> I am having some trouble using element.evaluate(properties) with
>>>>>>> documents fetched with XMLHttpRequest, so I am looking for a
>>>>>>>
>> method to
>>
>>>>>>> do the same as this:
>>>>>>>
>>>>>>> //*****
>>>>>>> var roundinfo = {
>>>>>>> runde : "56",
>>>>>>> heroesid : null,
>>>>>>> heroesnick : null
>>>>>>> }
>>>>>>>
>>>>>>> var path = '//table/tbody/tr/td';
>>>>>>> var obj = document.evaluate(path,document,null,
>>>>>>> XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> null);
>>>>>
>>>>>
>>>>>
>>>>>>> for (var k = 0; k < obj.snapshotLength; k++) {
>>>>>>> obj2 = obj.snapshotItem(k).parentNode;
>>>>>>> var nodes = obj2.childNodes;
>>>>>>>
>>>>>>> dump("Found keys: "+nodes.length+"\n");
>>>>>>> var menu =
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> nodes[0].textContent.trim().split("#");
>>>>>
>>>>>
>>>>>
>>>>>>> roundinfo.heroesnick = menu[0].trim();
>>>>>>> roundinfo.heroesid = menu[1].trim();
>>>>>>> dump("Nick is: "+roundinfo.heroesnick+"\n");
>>>>>>> dump("ID is: "+roundinfo.heroesid+"\n\n");
>>>>>>> }
>>>>>>> //*****
>>>>>>>
>>>>>>> And the document contains this:
>>>>>>>
>>>>>>> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
>>>>>>> <html>
>>>>>>> <head>
>>>>>>> <title></title>
>>>>>>> </head>
>>>>>>> <body>
>>>>>>> <table>
>>>>>>> <tr>
>>>>>>> <td colspan="3"><font face="arial" size="1"
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> color="DarkTurquoise">Axe Decapitators #130303</font></td>
>>>>>
>>>>>
>>>>>
>>>>>>> </tr>
>>>>>>>
>>>>>>>
>>>>>>> </table>
>>>>>>> </body>
>>>>>>> </html>
>>>>>>>
>>>>>>> And the dump would be
>>>>>>>
>>>>>>> Nick is: Axe Decapitators
>>>>>>> ID is: 130303
>>>>>>>
>>>>>>> And I tried some things to make it with XMLHttpRequest:
>>>>>>> //******* Attemp:
>>>>>>> var req = new XMLHttpRequest();
>>>>>>> req.overrideMimeType('text/html');
>>>>>>> req.open('GET',
>>>>>>> 'http://www.URL_TO_FETCH_CONTAINING_THE_ABOVE_CODE.dk',
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> true);
>>>>>
>>>>>
>>>>>
>>>>>>> req.onreadystatechange = function () {
>>>>>>> if (req.readyState == 4) {
>>>>>>> if(req.status != 404) {
>>>>>>> var path = '//table/tbody/tr/td/font';
>>>>>>> var domParser = new DOMParser();
>>>>>>> var dom =
>>>>>>>
>> domParser.parseFromString(req.responseText,
>>
>>>>>>> "text/xml").documentElement;
>>>>>>>
>>>>>>> var obj =
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> dom.evaluate(path,dom,null,XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
>>>>> null);
>>>>>
>>>>>
>>>>>
>>>>>>> for (var k = 0; k < obj.snapshotLength; k++) {
>>>>>>> obj2 = obj.snapshotItem(k).parentNode;
>>>>>>> var nodes = obj2.childNodes;
>>>>>>>
>>>>>>> dump("Found keys: "+nodes.length+"\n");
>>>>>>> var menu =
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> nodes[0].textContent.trim().split("#");
>>>>>
>>>>>
>>>>>
>>>>>>> roundinfo.heroesnick = menu[0].trim();
>>>>>>> roundinfo.heroesid = menu[1].trim();
>>>>>>> dump("Nick is: "+roundinfo.heroesnick+"\n");
>>>>>>> dump("ID is: "+roundinfo.heroesid+"\n\n");
>>>>>>> }
>>>>>>> }
>>>>>>> else
>>>>>>> dump("Error loading page with status"+ reg.status
>>>>>>>
>>>>>>>
>>>>>>>
>>>>> +"\n");
>>>>>
>>>>>
>>>>>
>>>>>>> }
>>>>>>> };
>>>>>>> req.send(null);
>>>>>>>
>>>>>>>
>>>>>>> But this only results in this:
>>>>>>> Error: syntax error
>>>>>>> Source File: chrome://browser/content/browser.xul
>>>>>>> Line: 1, Column: 62
>>>>>>> Source Code:
>>>>>>> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>> Transitional//EN">-------------------------------------------------------------^
>>
>>>>>
>>>>>
>>>>>
>>>>>>> Any tips on how to do this "right"?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> My regards.
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Project_owners mailing list
>>>>>>> Project_owners at mozdev.org
>>>>>>> http://mozdev.org/mailman/listinfo/project_owners
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> _______________________________________________
>>>>>> Project_owners mailing list
>>>>>> Project_owners at mozdev.org
>>>>>> http://mozdev.org/mailman/listinfo/project_owners
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>> Project_owners mailing list
>>>>> Project_owners at mozdev.org
>>>>> http://mozdev.org/mailman/listinfo/project_owners
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Project_owners mailing list
>>>>> Project_owners at mozdev.org
>>>>> http://mozdev.org/mailman/listinfo/project_owners
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> Project_owners mailing list
>>>> Project_owners at mozdev.org
>>>> http://mozdev.org/mailman/listinfo/project_owners
>>>>
>>>>
>>>>
>>>>
>>>>
>>> _______________________________________________
>>> Project_owners mailing list
>>> Project_owners at mozdev.org
>>> http://mozdev.org/mailman/listinfo/project_owners
>>>
>>>
>>>
>>>
>> _______________________________________________
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>> http://mozdev.org/mailman/listinfo/project_owners
>>
>> ------------------------------------------------------------------------
>>
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>>
>>
>
>
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