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
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.implementation.widget.provider;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import javax.servlet.http.HttpServletRequest;
import org.apache.tuscany.sca.common.http.HTTPContext;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
/**
* Implements an invoker for resource component implementations.
*
* @version $Rev$ $Date$
*/
class WidgetImplementationInvoker implements Invoker {
private RuntimeComponent component;
private ComponentJavaScriptGenerator javaScriptGenerator;
private String widgetName;
private String widgetFolderURL;
private String widgetLocationURL;
WidgetImplementationInvoker(RuntimeComponent component, ComponentJavaScriptGenerator javaScriptGenerator, String widgetName, String widgetFolderURL, String widgetLocationURL) {
this.component = component;
this.javaScriptGenerator = javaScriptGenerator;
this.widgetName = widgetName + ".js";
this.widgetFolderURL = widgetFolderURL;
this.widgetLocationURL = widgetLocationURL;
}
public Message invoke(Message msg) {
HTTPContext bindingContext = (HTTPContext) msg.getBindingContext();
HttpServletRequest request = bindingContext.getHttpRequest();
// Get the request path
String pathInfo = request.getPathInfo();
String path = null;
if(pathInfo != null) {
try {
path = URLDecoder.decode(pathInfo, "UTF-8");
} catch (UnsupportedEncodingException uee) {
//ignore for now
}
}
// Get the resource id from the request message
String id = path == null ? "" : path.substring(1);
try {
if (id.length() == 0) {
// Return an input stream for the widget resource
URL url = new URL(widgetLocationURL);
//InputStream is = url.openStream();
//msg.setBody(is);
writeResponse(bindingContext, url.openStream());
} else if (id.equals(widgetName)) {
// Generate JavaScript header for use in the Widget
ByteArrayOutputStream bos = new ByteArrayOutputStream();
PrintWriter pw = new PrintWriter(bos);
javaScriptGenerator.generateJavaScriptCode(component, pw);
InputStream is = new ByteArrayInputStream(bos.toByteArray());
//msg.setBody(is);
writeResponse(bindingContext, is);
} else {
// Return an input stream for a resource inside the
// widget folder
URL url = new URL(widgetFolderURL +'/' + id);
InputStream is = url.openStream();
//msg.setBody(is);
writeResponse(bindingContext, is);
}
} catch (MalformedURLException e) {
// Report exception as a fault
msg.setFaultBody(e);
} catch (IOException e) {
// Report exception as a fault
msg.setFaultBody(e);
}
return msg;
}
/**
* Write the widget response to the http response outputstream
* @param bindingContext
* @param is
* @throws IOException
*/
private static void writeResponse(HTTPContext bindingContext, InputStream is) throws IOException {
OutputStream os = bindingContext.getHttpResponse().getOutputStream();
byte[] buffer = new byte[2048];
for (;;) {
int n = is.read(buffer);
if (n <= 0)
break;
os.write(buffer, 0, n);
}
os.flush();
os.close();
}
}
|
