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Wiki source code of Development-Tips and Tricks

Last modified by Johann Werner on 2011/11/30 09:44
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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().applicationBaseURL() = /WebObjects
8 * WOApplication.application().baseURL() = /WebObjects
9 * WOApplication.application().cgiAdaptorURL() = [[http:~~/~~/hostname/cgi-bin/WebObjects>>url:http://hostname/cgi-bin/WebObjects||shape="rect"]]
10 * WOApplication.application().directConnectURL() = [[http:~~/~~/hostname:port/cgi-bin/WebObjects/MyApplication.woa>>url:http://hostname:port/cgi-bin/WebObjects/MyApplication.woa||shape="rect"]]
11 * WOApplication.application().frameworksBaseURL() = /WebObjects/Frameworks
12 * WOApplication.application().host() = hostname
13 * WOApplication.application().servletConnectURL() = [[http:~~/~~/hostname/cgi-bin/WebObjects/MyApplication.woa>>url:http://hostname/cgi-bin/WebObjects/MyApplication.woa||shape="rect"]]
14 * WOApplication.application().webserverConnectURL() = [[http:~~/~~/hostname/cgi-bin/WebObjects/MyApplication.woa/-port>>url:http://hostname/cgi-bin/WebObjects/MyApplication.woa/-port||shape="rect"]]
15
16 == Browser IP ==
17
18 {{code}}
19
20 /** Returns the IP address of the client.
21 * This should return accurate information whether in direct connect or webserver deployment mode.
22 * If performance caching is turned on on OS X server, this method will correctly use pc-remote-addr
23 * @return The IP address as a string.
24 */
25 public static String clientIP(WORequest request) {
26 Object ipAddress = request.headerForKey("pc-remote-addr");
27 if (ipAddress == null) {
28 ipAddress = request.headerForKey("remote_addr");
29 if( ipAddress == null ) {
30 ipAddress = request.headerForKey("remote_host");
31 if( ipAddress == null ) {
32 ipAddress = request._remoteAddress();
33 if( ipAddress == null ) {
34 ipAddress = request._originatingAddress();
35 if( ipAddress != null ) ipAddress = ((InetAddress)ipAddress).getHostAddress();
36 }
37 }
38 }
39 }
40 return ipAddress == null ? "<address unknown>" : ipAddress.toString();
41 }
42
43 {{/code}}
44
45 == NSArray ==
46
47 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
48
49 {{panel}}
50 objectAtIndex()
51 {{/panel}}
52
53 method. So what does
54
55 {{panel}}
56 NSArray.valueForKey(String key)
57 {{/panel}}
58
59 return?
60
61 Well, first read the docs: [[file:~~/~~//OSX/Developer/Documentation/WebObjects/Reference/com/webobjects/foundation/NSArray.html#valueForKey(java.lang.String>>url:file:///OSX/Developer/Documentation/WebObjects/Reference/com/webobjects/foundation/NSArray.html#valueForKey(java.lang.String||shape="rect"]])
62
63 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...
64
65 == HTML-friendly String Truncating ==
66
67 {{code}}
68
69 import org.apache.commons.lang.*; //From Apache
70 import org.clapper.util.text.*; // From http://www.clapper.org/
71
72 public static String stripHTMLTagsAndConcatenate(String htmlString, int numberOfChar) {
73 return (StringUtils.substringBeforeLast(StringUtils.abbreviate((HTMLUtil.stripHTMLTags(htmlString)), numberOfChar), " ")) + "...";
74 }
75
76 {{/code}}