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1
21
22 package nu.xom.samples;
23
24 import java.io.IOException  ;
25 import java.io.InputStream ;
26 import java.io.OutputStream ;
27 import java.net.HttpURLConnection ;
28 import java.net.URL ;
29 import java.net.URLConnection ;
30
31 import nu.xom.Builder;
32 import nu.xom.Document;
33 import nu.xom.Element;
34 import nu.xom.Elements;
35 import nu.xom.ParsingException;
36 import nu.xom.Serializer;
37
38
39
51 public class FibonacciXMLRPCClient {
52
53 private static String defaultServer
54 = "http://www.elharo.com/fibonacci/XML-RPC";
55
56 public static void main(String [] args) {
57
58 if (args.length == 0) {
59 System.out.println(
60 "Usage: java nu.xom.samples.FibonacciXMLRPCClient "
61 + " index serverURL"
62 );
63 return;
64 }
65
66 String index = args[0];
67
68 String server;
69 if (args.length <= 1) server = defaultServer;
70 else server = args[1];
71
72 try {
73 URL u = new URL (server);
74 URLConnection uc = u.openConnection();
75 HttpURLConnection connection = (HttpURLConnection ) uc;
76 connection.setDoOutput(true);
77 connection.setDoInput(true);
78 connection.setRequestMethod("POST");
79 OutputStream out = connection.getOutputStream();
80
81 Element methodCall = new Element("methodCall");
82 Element methodName = new Element("methodName");
83 methodName.appendChild("calculateFibonacci");
84 Element params = new Element("params");
85 Element param = new Element("param");
86 Element value = new Element("value");
87 Element data = new Element("int");
88 data.appendChild(index);
89 methodCall.appendChild(methodName);
90 methodCall.appendChild(params);
91 params.appendChild(param);
92 param.appendChild(value);
93 value.appendChild(data);
94 Document doc = new Document(methodCall);
95
96 Serializer serializer = new Serializer(out, "US-ASCII");
97 serializer.write(doc);
98
99 InputStream in = connection.getInputStream();
100
101 Builder parser = new Builder();
102 Document response = parser.build(in);
103
104 in.close();
105 out.close();
106 connection.disconnect();
107
108 Element methodResponse = response.getRootElement();
109 Elements body = methodResponse.getChildElements();
110 if (body.size() != 1) {
111 System.err.println("XML-RPC format error");
112 return;
113 }
114 if (body.get(0).getQualifiedName().equals("params")) {
115 Element responseParam = body.get(0).getFirstChildElement("param");
116 Element responseValue
117 = responseParam.getFirstChildElement("value");
118 Element responseDouble
119 = responseValue.getFirstChildElement("double");
120 System.out.println(responseDouble.getValue());
121 }
122 else if (body.get(0).getQualifiedName().equals("fault")) {
123 handleFault(body.get(0));
124 }
125 else {
126 System.err.println("XML-RPC Format Error");
127 return;
128 }
129
130 }
131 catch (ParsingException ex) {
132 System.err.println("Server sent malformed output");
133 System.err.println(ex);
134 }
135 catch (NullPointerException ex) {
136 System.err.println(
137 "Server sent invalid output without the expected content."
138 );
139 System.err.println(ex);
140 }
141 catch (IOException ex) {
142 System.err.println(ex);
143 }
144
145 }
146
147 private static void handleFault(Element fault) {
148
149 Element value = fault.getFirstChildElement("value");
150 Element struct = value.getFirstChildElement("struct");
151 Elements members = struct.getChildElements("member");
152 Element member1 = members.get(0);
153 Element member2 = members.get(1);
154 String code = "";
155 String detail = "";
156 Element name1 = member1.getFirstChildElement("name");
157 Element value1 = member1.getFirstChildElement("value");
158 Element name2 = member2.getFirstChildElement("name");
159 Element value2 = member2.getFirstChildElement("value");
160 if (name1.getValue().equals("faultCode")) {
161 code = value1.getValue();
162 detail = value2.getValue();
163 }
164 else if (name2.getValue().equals("faultCode")) {
165 code = value2.getValue();
166 detail = value1.getValue();
167 }
168 else {
169 throw new RuntimeException ("Incorrect fault message");
170 }
171 System.err.println("Fault: ");
172 System.err.println(" code: " + code);
173 System.err.println(" " + detail);
174 }
175
176 } |
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