首页 > 代码库 > OSChina 的URL重写处理类源码

OSChina 的URL重写处理类源码

2024-08-08 18:02:34   219人阅读

此代码是 oschina 用来处理形如 http://www.oschina.net/p/tomcat 这样的URL的类 

此类已经废弃，改用 http://www.oschina.net/code/snippet_12_2832 

标签：OSCHINA

[1].[代码] URLMappingServlet.java 跳至 [1]

?
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
packagemy.view;
 
importjava.io.*;
importjava.util.*;
 
importjavax.servlet.*;
importjavax.servlet.http.*;
 
importorg.apache.commons.lang.StringUtils;
importorg.apache.commons.logging.Log;
importorg.apache.commons.logging.LogFactory;
 
/**
 * 用于URL地址的转换
 * http://www.oschina.net/news/list/1/3 -> {base}/news/list.vm?p1=1&p2=3
 * @author liudong
 */
publicfinal class URLMappingServlet extendsHttpServlet {
 
    privatefinal static Log log = LogFactory.getLog(URLMappingServlet.class); 
     
    publicfinal static String CURRENT_URI = "current_uri";//{index}
    publicfinal static String REQUEST_URI = "request_uri";//{/index}
     
    privatefinal static String DEFAULT_INDEX_PAGE = "index.vm";
    privatefinal static String PAGE_EXTENSION = ".vm";
    privatefinal static char URL_SEPERATOR = ‘/‘;
 
    privateString default_base;
    privateHashMap<String, String> other_base = newHashMap<String, String>();
     
    privateString rootDomain = "oschina.net";
     
    @Override
    @SuppressWarnings("unchecked")
    publicvoid init() throwsServletException {
        Enumeration<String> names = getInitParameterNames();
        while(names.hasMoreElements()){
            String name = names.nextElement();
            String v = getInitParameter(name);
            if("default".equalsIgnoreCase(name)){
                default_base = v;
                continue;
            }
            for(String n : StringUtils.split(name, ‘,‘)){
                other_base.put(n, v);
            }
        }
    }
 
    privateString _GetTemplateBase(HttpServletRequest req) {
        String base = null;
        String prefix = req.getServerName().toLowerCase();
        base = other_base.get(prefix);
        if(base != null)
            returnbase;
        intidx = prefix.indexOf(rootDomain);
        if(idx > 0){
            prefix = prefix.substring(0, idx - 1);
            base = other_base.get(prefix);
        }
        return(base==null)?default_base:base;
    }
     
    /**
     * 执行页面映射过程
     * @param req
     * @param res
     * @throws ServletException
     * @throws IOException
     */
    protectedvoid perform(HttpServletRequest req, HttpServletResponse res)
            throwsServletException, IOException {
 
        StringBuilder show_page = newStringBuilder(_GetTemplateBase(req));
        String prefix = req.getServletPath().substring(1);
        String spath = req.getRequestURI();
        req.setAttribute(REQUEST_URI, spath);
        req.setAttribute(CURRENT_URI, prefix);
        //解析URL地址
        String[] s_result = spath.substring(1).split(String.valueOf(URL_SEPERATOR));
        if(s_result.length==1){
            show_page.append(prefix);
            show_page.append(URL_SEPERATOR);
            show_page.append(DEFAULT_INDEX_PAGE);
        }
        else{
            show_page.append(prefix);
            show_page.append(URL_SEPERATOR);
            // Ex: http://www.oschina.net/admin/login/ld
            StringBuilder testPath = newStringBuilder(show_page);
            testPath.append(s_result[1]);
            testPath.append(PAGE_EXTENSION);
            booleanisVM = _IsVmExist(testPath.toString());
            intparam_idx = 1;
            if(isVM){
                show_page.append(s_result[1]);
                show_page.append(PAGE_EXTENSION);
                param_idx = 2;
            }
            else{
                show_page.append(DEFAULT_INDEX_PAGE);
            }
            for(inti=param_idx;i<s_result.length;i++){
                if(i==param_idx)
                    show_page.append(‘?‘);
                else
                    show_page.append(‘&‘);
                show_page.append(‘p‘);
                show_page.append((i-param_idx+1));
                show_page.append(‘=‘);
                show_page.append(s_result[i]);
            }
            testPath.setLength(0);
            testPath = null;
        }
        if(log.isDebugEnabled())
            log.debug("request_uri="+spath+",servlet_path="+
                            req.getServletPath()+",vm="+show_page);
        //执行真实的页面
        RequestDispatcher rd = getServletContext().getRequestDispatcher(show_page.toString());
        rd.forward(req, res);  
         
    }
 
    privatefinal static List<String> vm_cache = newVector<String>();
     
    /**
     * 判断某个页面是否存在，如果存在则缓存此结果
     * @param path
     * @return
     */
    privateboolean _IsVmExist(String path){
        if(vm_cache.contains(path))
            returntrue;
        File testFile = newFile(getServletContext().getRealPath(path));
        booleanisVM = testFile.exists() && testFile.isFile();
        if(isVM)
            vm_cache.add(path);
        returnisVM;
    }
     
    @Override
    protectedvoid doGet(HttpServletRequest req, HttpServletResponse resp)
            throwsServletException, IOException {
        perform(req, resp);
    }
 
    @Override
    protectedvoid doPost(HttpServletRequest req, HttpServletResponse resp)
            throwsServletException, IOException {
        perform(req, resp);
    }
 
}

OSChina 的URL重写处理类源码


联系
我们