[Project_owners] evaluate html document by XMLHttpRequest
Foreningen Selvet - Jesper Staun Hansen
jesper at selvet.dk
Fri Aug 10 12:00:29 PDT 2007
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
> >
> >
> >
>
>
> _______________________________________________
> 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
>
More information about the Project_owners
mailing list