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Wiki source code of Development-Tips and Tricks

Version 4.1 by Pascal Robert on 2010/09/19 10:28
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Pascal Robert 3.1 1 == URL's ==
2
3 * wocontext.request().uri() = the URL currently being requested
4
5 There are several different URL's associated with your application, all of which can be retrieved from various methods on WOApplication. Here is a quick cheat sheet of them:
6
7 * WOApplication.application().baseURL() = /WebObjects
8 * WOApplication.application().applicationBaseURL() = /WebObjects
9 * WOApplication.application().cgiAdaptorURL() = [[http://hostname/cgi-bin/WebObjects]]
10 * WOApplication.application().directConnectURL() = [[http://hostname:port/cgi-bin/WebObjects/MyApplication.woa]]
11 * WOApplication.application().frameworksBaseURL() = /WebObjects/Frameworks
12 * WOApplication.application().servletConnectURL() = [[http://hostname/cgi-bin/WebObjects/MyApplication.woa]]
13 * WOApplication.application().webserverConnectURL() = [[http://hostname/cgi-bin/WebObjects/MyApplication.woa/-port]]
14
15 == Browser IP ==
16
17 {{code}}
18
19 /** Returns the IP address of the client.
20 * This should return accurate information whether in direct connect or webserver deployment mode.
21 * If performance caching is turned on on OS X server, this method will correctly use pc-remote-addr
22 * @return The IP address as a string.
23 */
24 public static String clientIP(WORequest request) {
25 Object ipAddress = request.headerForKey("pc-remote-addr");
26 if (ipAddress == null) {
27 ipAddress = request.headerForKey("remote_addr");
28 if( ipAddress == null ) {
29 ipAddress = request.headerForKey("remote_host");
30 if( ipAddress == null ) {
31 ipAddress = request._remoteAddress();
32 if( ipAddress == null ) {
33 ipAddress = request._originatingAddress();
34 if( ipAddress != null ) ipAddress = ((InetAddress)ipAddress).getHostAddress();
35 }
36 }
37 }
38 }
39 return ipAddress == null ? "<address unknown>" : ipAddress.toString();
40 }
41
42 {{/code}}
43
44 == NSArray ==
45
46 It's in the docs, but NSArray's implementation of KeyValueCoding is not really what I was expecting. To get an object at a specific numeric index of an NSArray, you'd use the
47
48 {{panel}}
49
50 objectAtIndex()
51
52 {{/panel}}
53
54 method. So what does
55
56 {{panel}}
57
58 NSArray.valueForKey(String key)
59
60 {{/panel}}
61
62 return?
63
64 Well, first read the docs: [[file:///OSX/Developer/Documentation/WebObjects/Reference/com/webobjects/foundation/NSArray.html#valueForKey(java.lang.String]])
65
66 It turns out that calling valueForKey on an array is the same as calling valueForKey for each element of that array. So if you have an NSArray of Users, calling valueForKey("email"); will return an NSArray of email addresses. calling valueForKey("documents"); will return an NSArray of NSArrays containing document objects. In hindsight (and from looking at the way WOBuilder handles key paths for arrays) this is kind of obvious. But I think the real lesson here is that it is easy to ignore the docs towards the end of an alphabetical page...
67
68 == HTML-friendly String Truncating ==
69
70 {{code}}
71
72 import org.apache.commons.lang.*; //From Apache
73 import org.clapper.util.text.*; // From http://www.clapper.org/
74
75 public static String stripHTMLTagsAndConcatenate(String htmlString, int numberOfChar) {
76 return (StringUtils.substringBeforeLast(StringUtils.abbreviate((HTMLUtil.stripHTMLTags(htmlString)), numberOfChar), " ")) + "...";
77 }
78
79
80 {{/code}}