[D�butant][XML Dom] object is null

Bonjour � tous,

voil� j'ai un petit soucis lorsque je souhaite int�grer un xml dans le dom

Voici le html avec le javascript

Code:

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<html>
    <head>
        <script type="text/javascript">
            var http = false;
            var releaseXML = null;
            function loadXML(xmlFile)
            {
 
                //load xml file
                // code for IE
                if (window.ActiveXObject)
                {
                    alert("enter loadXML for activeX");
                    releaseXML = new ActiveXObject("Microsoft.XMLDOM");
                    releaseXML.async = false;
                    releaseXML.load(xmlFile);
                }
                // code for Mozilla, etc.
                else if (document.implementation && document.implementation.createDocument)
                {
                    alert("enter loadXML for gecko");
                    releaseXML = document.implementation.createDocument("", "", null);
                    releaseXML.load(xmlFile);
 
                }
                else
                {
                    alert('Your browser can\'t handle this script');
                }
            }
 
 
            function getHTTPObject()
            {
                var xmlhttp = false;
 
                if (window.ActiveXObject)
                {
                    try
                    {
                        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
                    }
                    catch(e)
                    {
                        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                    }
                }
                else if (!xmlhttp && typeof XMLHttpRequest != 'undefined')
                {
                    xmlhttp = new XMLHttpRequest();
                    if (xmlhttp.overrideMimeType)
                        xmlhttp.overrideMimeType('text/xml');
                    if (!xmlhttp)
                        xmlhttp = null;
                }
 
                return xmlhttp;
            }
 
            function getNewRelease()
            {
                var urlic = "96522.xml";
 
                http = getHTTPObject();
                http.onreadystatechange = getReleaseInfo;
                http.open("GET", urlic, true);
                http.send(null);
            }
 
            function getReleaseInfo()
            {
                var form = '';
 
                if (http.readyState == 4)
                {
                    if (http.status == 200)
                    {
                        var release = http.responseXML;
                        loadXML(release);
                        form = form + "Artist: ";
                        form = form + getArtists(releaseXML.documentElement);
                        form = form + "\n";
                        form = form + "Album: ";
                        form = form + getAlbum(releaseXML);
                        form = form + "\n";
                        form = form + "Discogs: ";
                        form = form + getDiscogsLink(releaseXML.documentElement);
                        form = form + "\n";
                        form = form + "Label: ";
                        form = form + getLabel(releaseXML);
                        form = form + "\n";
                        form = form + "Catalog#: ";
                        form = form + getCatalog(releaseXML);
                        form = form + "\n";
                        form = form + "Released: ";
                        form = form + getReleased(releaseXML);
                        form = form + "\n";
                        form = form + "Style: ";
                        form = form + getStyle(releaseXML);
                        form = form + "\n";
                        form = form + "Quality: ";
                        form = form + "\n\n";
                        form = form + "Tracklist: ";
                        form = form + "\n\n";
                        form = form + getTracklist(releaseXML);
                        form = form + "\n";
                        document.getElementById("text").value = form;
 
 
                    }
                    else
                    {
                        alert('Server is too busy or not responding in time; please try again later.');
                    }
                }
 
            }
 
            function getArtists(xmlRelease)
            {
                var artists;
                var artistsValue = '';
                var artistsNodes = xmlRelease.getElementsByTagName("artists");
 
                for (var i = 0; i < artistsNodes.length; i++)
                {
                    if (artistsNodes[i].parentNode.tagName == "release")
                    {
                        artists = artistsNodes[i].getElementsByTagName("artist");
 
 
                        for (var j = 0; j < artists.length; j++)
                        {
                            var name = '';
                            var anv = '';
                            var join = '';
                            name = artists[j].getElementsByTagName("name")[0].firstChild.data;
                            if (artists[j].getElementsByTagName("anv")[0])
                                anv = artists[j].getElementsByTagName("anv")[0].firstChild.data;
                            if (artists[j].getElementsByTagName("join")[0])
                                join = artists[j].getElementsByTagName("join")[0].firstChild.data;
 
                            artistsValue = artistsValue + " " + (anv.length > 0 ? anv : name) + " " + (join.length > 0 ? join : '');
                        }
 
                    }
                }
 
                return artistsValue.replace(/^\s+/g, '').replace(/\s+$/g, '');
            }
 
            function getDiscogsLink(xmlRelease)
            {
                var releaseId = xmlRelease.getElementsByTagName("release")[0].attributes.getNamedItem("id").nodeValue;
                return "http://www.discogs.com/release/"+ releaseId;                
            }
 
            function getAlbum(xmlRelease)
            {
                var titles = xmlRelease.getElementsByTagName("title");
                var title = '';
                for (var i = 0; i < titles.length; i++)
                {
                    if (titles[i].parentNode.tagName == "release")
                    {
                        title = titles[i].firstChild.data;
                    }
                }
 
                return title;
            }
 
            function getLabel(xmlRelease)
            {
                var labels = xmlRelease.getElementsByTagName("labels");
                var labelValue = '';
                var label = '';
                for (var i = 0; i < labels.length; i++)
                {
                    label = labels[i].getElementsByTagName("label");
                    for (var j = 0; j < label.length; j++)
                    {
                        labelValue = labelValue + label[j].attributes.getNamedItem("name").nodeValue + " / ";
                    }
                }
 
                return labelValue.substring(0, labelValue.lastIndexOf("/")).replace(/^\s+/g, '').replace(/\s+$/g, '');
            }
 
            function getCatalog(xmlRelease)
            {
                var labels = xmlRelease.getElementsByTagName("labels");
                var catalog = '';
                var catalogValue = '';
                for (var i = 0; i < labels.length; i++)
                {
                    catalog = labels[i].getElementsByTagName("label");
                    for (var j = 0; j < catalog.length; j++)
                    {
                        catalogValue = catalogValue + catalog[j].attributes.getNamedItem("catno").nodeValue + " / ";
                    }
                }
 
                return catalogValue.substring(0, catalogValue.lastIndexOf("/")).replace(/^\s+/g, '').replace(/\s+$/g, '');
            }
 
            function getReleased(xmlRelease)
            {
                if (xmlRelease.getElementsByTagName("released")[0] && xmlRelease.getElementsByTagName("released")[0].firstChild != null)
                    return xmlRelease.getElementsByTagName("released")[0].firstChild.data;
                else return '';
            }
 
            function getStyle(xmlRelease)
            {
                var styles = xmlRelease.getElementsByTagName("styles");
                var style = '';
                var styleValue = '';
                for (var i = 0; i < styles.length; i++)
                {
                    style = styles[i].getElementsByTagName("style");
                    for (var j = 0; j < style.length; j++)
                    {
                        styleValue = styleValue + style[j].firstChild.data + " / ";
                    }
                }
                return styleValue.substring(0, styleValue.lastIndexOf("/")).replace(/^\s+/g, '').replace(/\s+$/g, '');
            }
 
            function getTracklist(xmlRelease)
            {
                var tracks = xmlRelease.getElementsByTagName("track");
                var tracklist = '';
 
                for (var i = 0; i < tracks.length; i++)
                {
                    var position = tracks[i].getElementsByTagName("position")[0].firstChild.data;
                    var artists = tracks[i].getElementsByTagName("artists");
                    var artist = '';
                    var artistValue = '';
                    for (var j = 0; j < artists.length; j++)
                    {
                        artist = artists[j].getElementsByTagName("artist");
 
                        for (var k = 0; k < artist.length; k++)
                        {
                            var name = '';
                            var anv = '';
                            var join = '';
                            name = artist[k].getElementsByTagName("name")[0].firstChild.data;
                            if (artist[k].getElementsByTagName("anv")[0])
                                anv = artist[k].getElementsByTagName("anv")[0].firstChild.data;
                            if (artist[k].getElementsByTagName("join")[0])
                                join = artist[k].getElementsByTagName("join")[0].firstChild.data;
 
                            artistValue = artistValue + (anv.length > 0 ? anv : name) + " " + (join.length > 0 ? " " + join + " " : " / ");
                        }
                    }
                    artistValue = artistValue.substring(0, artistValue.lastIndexOf("/")).replace(/^\s+/g, '').replace(/\s+$/g, '');
                    var title = tracks[i].getElementsByTagName("title")[0].firstChild.data;
                    var duration = '';
                    if (tracks[i].getElementsByTagName("duration")[0] && tracks[i].getElementsByTagName("duration")[0].firstChild != null)
                        duration = "(" + tracks[i].getElementsByTagName("duration")[0].firstChild.data + ")";
 
                    tracklist = tracklist + position + " " + artistValue + (artistValue.length > 0 ? " - " : "") + title + " " + duration + "\n";
                }
                return tracklist;
            }
        </script>
    </head>
    <body>
        <table>
            <tr><td>
                <input type="text" id="ajdi" value=""/>
                <input type="button" onclick="getNewRelease()" name="submitId" value="populate from Discogs"/>
            </td><td></td></tr>
            <tr><td colspan="2"><textarea rows="40" cols="100" id="text"></textarea></td></tr>
        </table>
 
 
        <div id="foo">
 
        </div>
    </body>
 
</html>

Et voici enfin le xml

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<?xml version="1.0" encoding="utf-8"?>
<!-- Created with Liquid XML Studio 1.0.8.0 (http://www.liquid-technologies.com) -->
<resp stat="ok" version="1.0" requests="4">
	<release id="1109542" status="Accepted">
		<images>
			<image height="600" type="primary" uri="http://www.discogs.com/image/R-1109542-1192735422.jpeg" uri150="http://www.discogs.com/image/R-150-1109542-1192735422.jpeg" width="581" />
			<image height="600" type="secondary" uri="http://www.discogs.com/image/R-1109542-1192735435.jpeg" uri150="http://www.discogs.com/image/R-150-1109542-1192735435.jpeg" width="580" />
		</images>
		<artists>
			<artist>
				<name>Various</name>
			</artist>
		</artists>
		<title>2OO</title>
		<labels>
			<label catno="ZIQ200CD" name="Planet Mu" />
		</labels>
		<formats>
			<format name="CDr" qty="2">
				<descriptions>
					<description>Compilation</description>
					<description>Promo</description>
					<description>Album</description>
				</descriptions>
			</format>
		</formats>
		<genres>
			<genre>Electronic</genre>
		</genres>
		<styles>
			<style>IDM</style>
			<style>Dubstep</style>
			<style>Breakcore</style>
			<style>Acid</style>
		</styles>
		<country>UK</country>
		<released>2007-10-08</released>
		<notes>Celebrating Planet Mu's 10th birthday and 200th release. In PVC slipcase with printed insert.CD1/CD2 written on CD-R's in marker pen.</notes>
		<tracklist>
			<track>
				<position>1.01</position>
				<artists>
					<artist>
						<name>Ceephax Acid Crew</name>
						<anv>Ceephax</anv>
					</artist>
				</artists>
				<title>Castilian</title>
				<duration>4:54</duration>
			</track>
			<track>
				<position>1.02</position>
				<artists>
					<artist>
						<name>Darqwan</name>
					</artist>
				</artists>
				<title>M/A.. Ximum Reespek</title>
				<duration>5:37</duration>
			</track>
			<track>
				<position>1.03</position>
				<artists>
					<artist>
						<name>Boxcutter</name>
					</artist>
				</artists>
				<title>Good You Dub</title>
				<duration>4:52</duration>
			</track>
			<track>
				<position>1.04</position>
				<artists>
					<artist>
						<name>Gasman, The</name>
					</artist>
				</artists>
				<title>Equino</title>
				<duration>4:51</duration>
			</track>
			<track>
				<position>1.05</position>
				<artists>
					<artist>
						<name>Ital Tek</name>
					</artist>
				</artists>
				<title>Whitemark</title>
				<duration>4:18</duration>
			</track>
			<track>
				<position>1.06</position>
				<artists>
					<artist>
						<name>Parson (2)</name>
					</artist>
				</artists>
				<title>Throw Some Ds</title>
				<duration>4:41</duration>
			</track>
			<track>
				<position>1.07</position>
				<artists>
					<artist>
						<name>Bizzy B</name>
						<join>&amp;</join>
					</artist>
					<artist>
						<name>Equinox (3)</name>
					</artist>
				</artists>
				<title>Merda Style 2004</title>
				<duration>5:11</duration>
			</track>
			<track>
				<position>1.08</position>
				<artists>
					<artist>
						<name>Syntheme</name>
					</artist>
				</artists>
				<title>Finnial (Chevron's Acid Sandwich Bhuna Mix)</title>
				<extraartists>
					<artist>
						<name>Chevron</name>
						<role>Remix</role>
					</artist>
				</extraartists>
				<duration>3:03</duration>
			</track>
			<track>
				<position>1.09</position>
				<artists>
					<artist>
						<name>Venetian Snares</name>
					</artist>
				</artists>
				<title>Devil's Totem</title>
				<duration>4:23</duration>
			</track>
			<track>
				<position>1.10</position>
				<artists>
					<artist>
						<name>Milanese</name>
						<join>Feat.</join>
					</artist>
					<artist>
						<name>Anneka</name>
					</artist>
				</artists>
				<title>Reading You</title>
				<extraartists>
					<artist>
						<name>Anneka</name>
						<role>Featuring</role>
					</artist>
				</extraartists>
				<duration>2:26</duration>
			</track>
			<track>
				<position>1.11</position>
				<artists>
					<artist>
						<name>Julian Fane</name>
					</artist>
				</artists>
				<title>The Moon Is Gone</title>
				<duration>4:33</duration>
			</track>
			<track>
				<position>1.12</position>
				<artists>
					<artist>
						<name>DJ Distance</name>
						<anv>Distance</anv>
					</artist>
				</artists>
				<title>Fallen (Vex'd Remix)</title>
				<extraartists>
					<artist>
						<name>Vex'd</name>
						<role>Remix</role>
					</artist>
				</extraartists>
				<duration>6:18</duration>
			</track>
			<track>
				<position>1.13</position>
				<artists>
					<artist>
						<name>Ambulance</name>
					</artist>
				</artists>
				<title>The Tams</title>
				<duration>6:19</duration>
			</track>
			<track>
				<position>2.01</position>
				<artists>
					<artist>
						<name>Pinch (2)</name>
					</artist>
				</artists>
				<title>Punisher (Loefah's SE25 Remix)</title>
				<extraartists>
					<artist>
						<name>Loefah</name>
						<role>Remix</role>
					</artist>
				</extraartists>
				<duration>5:36</duration>
			</track>
			<track>
				<position>2.02</position>
				<artists>
					<artist>
						<name>Luke Vibert</name>
					</artist>
				</artists>
				<title>Acid Meters</title>
				<duration>3:45</duration>
			</track>
			<track>
				<position>2.03</position>
				<artists>
					<artist>
						<name>FFF</name>
					</artist>
				</artists>
				<title>The Feeling</title>
				<duration>5:43</duration>
			</track>
			<track>
				<position>2.04</position>
				<artists>
					<artist>
						<name>Pinch (2)</name>
					</artist>
				</artists>
				<title>Pepper Spray</title>
				<duration>4:49</duration>
			</track>
			<track>
				<position>2.05</position>
				<artists>
					<artist>
						<name>Shitmat</name>
					</artist>
				</artists>
				<title>Shut Up (Hellfish Remix)</title>
				<extraartists>
					<artist>
						<name>Hellfish</name>
						<role>Remix</role>
					</artist>
				</extraartists>
				<duration>5:41</duration>
			</track>
			<track>
				<position>2.06</position>
				<artists>
					<artist>
						<name>Tim Exile</name>
						<anv>Exile</anv>
						<join>&amp;</join>
					</artist>
					<artist>
						<name>John B</name>
					</artist>
				</artists>
				<title>Broken Language (Exile Mix)</title>
				<extraartists>
					<artist>
						<name>Tim Exile</name>
						<anv>Exile</anv>
						<role>Remix</role>
					</artist>
				</extraartists>
				<duration>5:38</duration>
			</track>
			<track>
				<position>2.07</position>
				<artists>
					<artist>
						<name>Doubtful Guest, The</name>
					</artist>
				</artists>
				<title>Nannita</title>
				<duration>7:11</duration>
			</track>
			<track>
				<position>2.08</position>
				<artists>
					<artist>
						<name>µ-Ziq</name>
					</artist>
				</artists>
				<title>Lexicon</title>
				<duration>4:16</duration>
			</track>
			<track>
				<position>2.09</position>
				<artists>
					<artist>
						<name>Jo Apps</name>
					</artist>
				</artists>
				<title>Kausikan</title>
				<duration>4:21</duration>
			</track>
			<track>
				<position>2.10</position>
				<artists>
					<artist>
						<name>Neil Landstrumm</name>
					</artist>
				</artists>
				<title>Bleep Biopsy</title>
				<duration>4:36</duration>
			</track>
			<track>
				<position>2.11</position>
				<artists>
					<artist>
						<name>Benga</name>
					</artist>
				</artists>
				<title>Broken Dubstep</title>
				<duration>5:33</duration>
			</track>
			<track>
				<position>2.12</position>
				<artists>
					<artist>
						<name>Duran Duran Duran</name>
					</artist>
				</artists>
				<title>Face Blast</title>
				<duration>3:53</duration>
			</track>
			<track>
				<position>2.13</position>
				<artists>
					<artist>
						<name>Mark One</name>
						<anv>MRK 1</anv>
					</artist>
				</artists>
				<title>Sensi Skank</title>
				<duration>4:13</duration>
			</track>
		</tracklist>
	</release>
</resp>

L'erreur retourn�e est que xmlRelease (param�tre de la fonction getArtist()) est null.

Je ne comprends pas pourquoi. Mais comme je suis d�butant je suppose que je fais une grosse boulette au moment de passer le xml dans l'arbre DOM.

Et je suis oblig� de passer par loadxml sinon le script ne marche pas sous IE.

D'avance merci pour vos r�ponses.

Code:

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var release = http.responseXML;
loadXML(release);
form = form + "Artist: ";
form = form + getArtists(releaseXML.documentElement);

Erreur de variable dans l'appel de la fonction ?

Euh je ne pense pas, puisque tout en haut du script tu trouve la variable releaseXML. C'est cette variable que j'initialise et j'utilise par la suite.

Merci quand m�me pour ton aide. Si tu as une autre id�e elle est la bienvenue.

Euh, si :

Code:

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if (window.ActiveXObject)
                {
                    alert("enter loadXML for activeX");
                    releaseXML = new ActiveXObject("Microsoft.XMLDOM");
                    releaseXML.async = false;
                    releaseXML.load(xmlFile);
                }
                // code for Mozilla, etc.
                else if (document.implementation && document.implementation.createDocument)
                {
                    alert("enter loadXML for gecko");
                    releaseXML = document.implementation.createDocument("", "", null);
                    releaseXML.load(xmlFile);
 
                }

releaseXML est un objet, pas un document XML, donc :

Code:

form = form + getArtists(releaseXML.documentElement);

releaseXML.documentElement est null puisque documentElement n'est pas une propri�t� de ActiveXObject !

Je dois passer comme param�tre la variable 'release' alors??

Parce que si je fais �a cela ne marche pas non plus.

Peux-tu me dire si mon code javascript est standard pour tous les browsers??

Parce que si j'utilise la variable release comme param�tre, internet explorer ne me retourne aucune erreur mais il ne me trouve aucune information non plus.

Merci beaucoup

Citation:

Peux-tu me dire si mon code javascript est standard pour tous les browsers??

Ca ne marchera pas sous Webkit (safari + chrome) ca :
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 if (window.ActiveXObject) { alert("enter loadXML for activeX"); releaseXML = new ActiveXObject("Microsoft.XMLDOM"); releaseXML.async = false; releaseXML.load(xmlFile); } // code for Mozilla, etc. else if (document.implementation && document.implementation.createDocument) { alert("enter loadXML for gecko"); releaseXML = document.implementation.createDocument("", "", null); releaseXML.load(xmlFile);
Edit: la fa�on crossbrowser de charger un fichier xml pour ensuite le traiter est de le charger via XmlHTTPRequest, de r�cup�rer le responseText, et ensuite parser ce texte pour cr�er un document xml.

Sous IE:
Code:

1 2 3 xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); xmlDoc.async="false"; xmlDoc.loadXML(xhr.responseText);
Sous les autres navigateurs:
Code:

1 2 parser=new DOMParser(); xmlDoc=parser.parseFromString(xhr.responseText,"text/xml");
Note bien que le xmlDoc que tu r�cup�res correspond au document XML, le noeud racine est accessible via xmlDoc.documentElement.

Ouiiiiiiiiiiii �a marche.

Impeccable. :yaisse2:

Donc la technique c'est d'utiliser le xhr.responseText et de reparser le document texte en xml.

Au moins j'en apprends tous les jours :mouarf:

Merci beaucoup pour votre aide � tous les deux.