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1
17
18 package tutorial;
19
20 import java.net.URI  ;
21 import java.net.URISyntaxException ;
22 import java.nio.ByteBuffer ;
23 import java.nio.CharBuffer ;
24 import java.nio.charset.Charset ;
25 import java.util.regex.Matcher ;
26 import java.util.regex.Pattern ;
27
28
35 public class Request {
36
37 static class Action {
38 private String m_name;
39 static final Action GET = new Action("GET");
40 static final Action POST = new Action("POST");
41 static final Action PUT = new Action("PUT");
42 static final Action HEAD = new Action("HEAD");
43
44 private Action(String name) {
45 m_name = name;
46 }
47
48 public String toString() {
49 return m_name;
50 }
51
52 static Action parse(String s) throws IllegalArgumentException {
53 if (s.equals("GET")) {
54 return GET;
55 }
56 if (s.equals("POST")) {
57 return POST;
58 }
59 if (s.equals("PUT")) {
60 return PUT;
61 }
62 if (s.equals("HEAD")) {
63 return HEAD;
64 }
65 throw new IllegalArgumentException (s);
66 }
67 }
68
69 private Action m_action;
70 private String m_version;
71 private URI m_uri;
72
73 private Request(Action action, String version, URI uri) {
74 setAction(action);
75 setVersion(version);
76 setUri(uri);
77 }
78
79 private static Charset ascii = Charset.forName("US-ASCII");
80
81 private static Pattern requestPattern = Pattern.compile(
82 "\\A([A-Z]+) +([^ ]+) +HTTP/([0-9\\.]+)$"
83 + ".*^Host: ([^ ]+)$.*\r\n\r\n", Pattern.MULTILINE | Pattern.DOTALL);
84
85 public static Request parse(ByteBuffer bb) throws MalformedRequestException {
86 CharBuffer cb = ascii.decode(bb);
87
88 Matcher m = requestPattern.matcher(cb);
89 if (!m.matches()) {
90 throw new MalformedRequestException();
91 }
92
93 Action a;
94 try {
95 a = Action.parse(m.group(1));
96 }
97 catch (IllegalArgumentException e) {
98 throw new MalformedRequestException(e);
99 }
100
101 URI u;
102 try {
103 u = new URI ("http://" + m.group(4) + m.group(2));
104 }
105 catch (URISyntaxException e) {
106 throw new MalformedRequestException(e);
107 }
108
109 return new Request(a, m.group(3), u);
110 }
111
112 public Action getAction() {
113 return m_action;
114 }
115
116 public String getVersion() {
117 return m_version;
118 }
119
120 public URI getUri() {
121 return m_uri;
122 }
123
124 public boolean isGet() {
125 if (m_action.toString().equals("GET")) {
126 return true;
127 }
128 else {
129 return false;
130 }
131 }
132
133 private void setAction(Action action) {
134 m_action = action;
135 }
136
137 private void setVersion(String version) {
138 m_version = version;
139 }
140
141 private void setUri(URI uri) {
142 m_uri = uri;
143 }
144 }
145 |
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Java API By Example, From Geeks To Geeks.