[Project_owners] evaluate html document by XMLHttpRequest
Foreningen Selvet - Jesper Staun Hansen
jesper at selvet.dk
Fri Aug 10 10:56:28 PDT 2007
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
>>>>>
>>>>>
>>>>>
>>>>>
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