[23789] | 1 | package org.greenstone.gsdl3;
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| 2 |
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| 3 | import org.apache.log4j.*; // Actually add logging?
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| 4 | import org.apache.commons.lang3.StringUtils;
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| 5 | import org.greenstone.gsdl3.util.XSLTUtil;
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| 6 | import java.io.*;
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| 7 | import javax.servlet.*;
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| 8 | import javax.servlet.http.*;
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| 9 | import org.greenstone.gsdl3.util.Dictionary;
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| 10 | import java.util.Enumeration;
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| 11 |
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| 12 | public class ClientSideServlet extends HttpServlet {
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| 13 |
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| 14 | public void init(ServletConfig config) throws ServletException {
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| 15 | super.init(config);
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| 16 | }
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| 17 |
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| 18 | public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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| 19 |
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| 20 | String query_string = request.getQueryString();
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| 21 | PrintWriter w = response.getWriter();
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| 22 |
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| 23 | if(query_string == null)
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| 24 | displayParamError(response);
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| 25 |
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| 26 | String[] parts = StringUtils.split(query_string, "&");
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| 27 |
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| 28 | String[] keys = null; // Array of keys to look up
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| 29 | String lang = "";
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| 30 | String interface_name = "";
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| 31 | String command = "";
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| 32 | String params = "";
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| 33 |
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| 34 | for(String part : parts) {
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| 35 |
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| 36 | String[] nameval = StringUtils.split(part, '=');
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| 37 |
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| 38 | if(nameval.length != 2) {
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| 39 | displayParamError(response);
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| 40 | return;
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| 41 | }
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| 42 |
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| 43 | String name = nameval[0];
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| 44 | String value = nameval[1];
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| 45 |
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| 46 | if(name.equals("k"))
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| 47 | keys = StringUtils.split(value, ",");
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| 48 | else if(name.equals("l"))
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| 49 | lang = value;
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| 50 | else if(name.equals("i"))
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| 51 | interface_name = value;
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| 52 | else if(name.equals("c"))
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| 53 | // Alternative commands
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| 54 | command = value;
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| 55 | else if(name.equals("p"))
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| 56 | params = value;
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| 57 | }
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| 58 |
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| 59 | if(keys == null && command.equals("") && params.equals("")) {
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| 60 | // Not satisfiable
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| 61 | displayParamError(response);
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| 62 | return;
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| 63 | }
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| 64 |
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| 65 | String bundle = "<?xml version=\"1.0\" encoding=\"iso-8859-1\" ?>\r\n<textBundle>\r\n";
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| 66 |
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| 67 | if(!command.equals("") && !params.equals("")) {
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| 68 |
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| 69 | // Alternative commands other than dictionary lookup
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| 70 | String[] parameters = StringUtils.split(params, "|");
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| 71 | String result = null;
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| 72 |
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| 73 | if(command.equals("getNumberedItem") && parameters.length == 2) {
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| 74 | result = XSLTUtil.getNumberedItem(parameters[0], Integer.parseInt(parameters[1]));
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| 75 | } else if(command.equals("exists") && parameters.length == 2) {
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| 76 | result = XSLTUtil.exists(parameters[0], parameters[1]) ? "true" : "false";
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| 77 | } else if(command.equals("isImage") && parameters.length == 1) {
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| 78 | result = (XSLTUtil.isImage(parameters[0])) ? "true" : "false";
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| 79 | }
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| 80 |
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| 81 | if(result != null) {
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| 82 | bundle += " <method name=\"" + command + "\" parameters=\"" + params + "\" return=\"" + result + "\" />\r\n";
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| 83 | } else { displayParamError(response); return; }
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| 84 | } else {
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| 85 |
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| 86 | for(String key : keys) {
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| 87 |
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| 88 | String original_key = key;
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| 89 | String[] theParts = StringUtils.split(key, "|");
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| 90 | String[] args = null;
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| 91 |
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| 92 | if(theParts.length > 1)
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| 93 | args = StringUtils.split(theParts[1], ";");
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| 94 |
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| 95 | key = theParts[0];
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| 96 |
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| 97 | // Straight from XSLTUtils.java (src), with some modifications
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| 98 | if(key.equals("null")) {
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| 99 | bundle += " <item key=\"" + key + "\" value=\"\" />\r\n";
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| 100 | continue;
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| 101 | }
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| 102 |
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| 103 | Dictionary dict = new Dictionary("interface_"+interface_name, lang);
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| 104 | String result = dict.get(key, args);
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| 105 |
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| 106 | if (result == null) {
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| 107 | String sep_interface_dir = interface_name + File.separatorChar + lang + File.separatorChar + "interface";
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| 108 | dict = new Dictionary(sep_interface_dir, lang);
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| 109 | result = dict.get(key, args);
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| 110 | }
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| 111 |
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| 112 | if (result == null && !interface_name.equals("default")) { // not found, try the default interface
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| 113 | dict = new Dictionary("interface_default", lang);
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| 114 | result = dict.get(key, args);
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| 115 | }
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| 116 |
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| 117 | if (result == null) { // not found
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| 118 | result = "_" + original_key + "_";
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| 119 | }
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| 120 |
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| 121 | bundle += " <item key=\"" + encode(original_key) + "\" value=\"" + encode(result) + "\" />\r\n";
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| 122 | } }
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| 123 |
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| 124 | bundle += "</textBundle>";
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| 125 |
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| 126 | response.setContentType("text/xml");
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| 127 |
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| 128 | w.print(bundle);
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| 129 | w.close();
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| 130 | }
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| 131 |
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| 132 | private String encode(String s) {
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| 133 | s = StringUtils.replace(s, "&", "&");
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| 134 | s = StringUtils.replace(s, "<", "<");
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| 135 | s = StringUtils.replace(s, ">", ">");
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| 136 | return s;
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| 137 | }
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| 138 |
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| 139 | private void displayParamError(HttpServletResponse response) {
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| 140 |
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| 141 | try {
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| 142 | PrintWriter w = response.getWriter();
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| 143 | w.write("Invalid parameters supplied! Need key (k=), interface name (i=) and language (l=). If you specified a method call, it must be on the list of supported method calls, and you must specify a command (c=) and parameters (p=).");
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| 144 | w.close();
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| 145 | } catch (Exception ex) { /* Should log here */ }
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| 146 |
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| 147 | }
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| 148 |
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| 149 | }
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