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
|
<html>
<head>
<meta http-equiv="Pragma" content="no-cache"/>
<meta http-equiv="Cache-Control" content="no-cache"/>
<meta http-equiv="Expires" content="-1" />
<title>Web Services - Sample 13: Using jQuery with the PyMOL web server</title>
<script src="json2.js"></script>
<script src="pymol.js"></script>
<script src="jquery.js"></script>
<script type="text/javascript">
// This page assumes that PyMOL is running on 8083
var pymolhost = "http://localhost:8083";
function callback1(result)
{
document.getElementById('result').innerHTML = "<pre>"+result+"</pre>";
}
$(document).ready(function() {
$("a[name=load]").click(function() {
try {
$.getJSON(pymolhost+"/apply/pymol.cmd.load?filename=$PYMOL_PATH/test/dat/pept.pdb&_callback=?", callback1);
} catch (e) {
alert(e);
}
return false; // causes the HREF to not load a new page
});
$("a[name=delete]").click(function() {
try {
$.getJSON(pymolhost+"/apply/pymol.cmd.delete?name=pept&_callback=?", callback1);
} catch (e) {
alert(e);
}
return false; // causes the HREF to not load a new page
});
$("a[name=get_names]").click(function() {
try {
$.getJSON(pymolhost+"/apply/pymol.cmd.get_names?type=objects&_callback=?", callback1);
} catch (e) {
alert(e);
}
return false; // causes the HREF to not load a new page
});
$("a[name=badload]").click(function() {
try {
$.getJSON(pymolhost+"/apply/pymol.cmd.load?filename=$PYMOL_PATH/test/dat/pept.pdb");
} catch (e) {
if (e.description == undefined) {
alert(e); //Firefox
} else {
alert(e.description); //Explorer
}
}
return false; // causes the HREF to not load a new page
});
});
</script>
<style text/css>
a.info {
text-decoration:underline;
background-color: transparent;
}
a{
text-decoration:none;
padding: 1px;
background-color: #dddddd
}
</style>
</head>
<body>
<h3>Web Services - Sample 13: Using jQuery with the PyMOL web server</h3>
<a href="javascript:void(0)" onclick="window.open('view-source:' + location.href)">view page source</a>
<a href="http://localhost:8083/apply/_quit?href">quit pymol</a>
<p>
<div id="debug">
</div>
PyMOL results will appear here
<div id="result" style="border-style: solid; padding: 10">
</div>
</p>
<p>
A simple
<A class=info HREF="http://jquery.com/" TARGET=_blank>jQuery</A>
and JSON function is $.getJSON. This function accepts a URL and the
name of a JavaScript function to call after the URL result arrives.
<pre>
<A HREF="javascript:$.getJSON('http://localhost:8083/apply/pymol.cmd.load?filename=$PYMOL_PATH/test/dat/pept.pdb&_callback=?', callback1)">load</A>
</pre>
causes this
<A HREF="javascript:$.getJSON('http://localhost:8083/apply/pymol.cmd.load?filename=$PYMOL_PATH/test/dat/pept.pdb&_callback=?', callback1)">load</A>
</A>
link to appear.
The callback1 function simply places the result into the black-border box
above. You can view this callback1 function by
using the "view page source" link above.
</p>
<p>Next, let's
<A HREF="javascript:$.getJSON('http://localhost:8083/apply/pymol.cmd.delete?name=pept&_callback=?', callback1)">delete</A>
</A>
this object and show another common way of using jQuery.
<p>
This html snippet
<pre>
<a href="javascript:void(0)" name=load>load</a>
</pre>
defines a
<a href="javascript:void(0)" name=load>load</a>
link that is much simpler,
putting the responsibilty on the jQuery $("a[name=load]").click property
to define how to handle this link.
This definition occurs in the jQuery $(document).ready function
<pre>
$(document).ready(function() {
$("a[name=load]").click(function() {
try {
$.getJSON(host+"/apply/pymol.cmd.load?filename=$PYMOL_PATH/test/dat/pept.pdb&_callback=?", callback1);
} catch (e) {
alert(e);
}
return false; // causes the HREF to not load a new page
});
});
</pre>
The full source can
be seen by following the "view page source" link above.
</p>
<p>
Other links can be defined in a similar way, for example to
<a href="javascript:void(0)" name=get_names>get object names</a>
or to
<a href="javascript:void(0)" name=delete>delete</a> the object we loaded.
</p>
<p>
Sample16 shows how you can construct complex URL's containing multiple
pymol commands. These URL strings can be used in the $.getJSON function
shown above.
</p>
<p><b>jQuery and cross-domain scripting</b></p>
<p>
This document came from
<script>document.write(document.URL)</script>
as shown in the URL location bar of this browser.
The jQuery requests are made to the PyMOL server at
<script>document.write(pymolhost)</script>
This is a cross-domain request that violates the same-origin policy.
But jQuery uses a workaround called cross-domain scripting with JSONP
that allows a callback to process any response from the PyMOL server.
In order to illustrate the necessity of a callback in this situation,
click on this link to get an error alert.
<br>
<a href="javascript:void(0)" name=badload>badload</a>
</p>
<!-- the only purpose of this IFRAME is to launch PyMOL via the PWG
-- helper mechanism -->
<iframe src="start8083.pwg" name=pwglaunch
width="0" height="0" frameborder="0"
marginheight="0" marginwidth="0"
scrolling="auto"></iframe>
</body>
</html>
|
