[Débutant][XML Dom] object is null

Bonjour à tous,

voilà j'ai un petit soucis lorsque je souhaite intégrer un xml dans le dom

Voici le html avec le javascript

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
<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

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
<?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 retournée est que xmlRelease (paramètre de la fonction getArtist()) est null.

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

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

D'avance merci pour vos réponses.

Code:

1
2
3
4
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 même pour ton aide. Si tu as une autre idée elle est la bienvenue.

Euh, si :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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 propriété de ActiveXObject !

Je dois passer comme paramètre la variable 'release' alors??

Parce que si je fais ça 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 paramètre, 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 façon crossbrowser de charger un fichier xml pour ensuite le traiter est de le charger via XmlHTTPRequest, de récupérer le responseText, et ensuite parser ce texte pour créer 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 récupères correspond au document XML, le noeud racine est accessible via xmlDoc.documentElement.

Ouiiiiiiiiiiii ça 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 à tous les deux.