[Project_owners] evaluate html document by XMLHttpRequest
Foreningen Selvet - Jesper Staun Hansen
jesper at selvet.dk
Fri Aug 10 09:41:18 PDT 2007
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
>>>>
>>>>
>>>>
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>>>
>>>
>>>
>>>
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