-
Notifications
You must be signed in to change notification settings - Fork 195
/
ResponseOf.java
120 lines (117 loc) · 4.21 KB
/
ResponseOf.java
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
/**
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.servlet;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpCookie;
import java.util.Iterator;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import org.takes.Response;
/**
* Takes response as servlet response.
*
* @author Kirill (g4s8.public@gmail.com)
* @version $Id $
* @since 2.0
* @todo #682:30min Servlet request and response adapters are not unit-tested.
* There should be tests for reading headers and body from servlet request
* and test for validating servlet response after applying takes request.
*/
final class ResponseOf {
/**
* Buffer size.
*/
private static final int BUFSIZE = 8192;
/**
* Http response first line head pattern.
*/
private static final Pattern HTTP_MATCHER = Pattern.compile(
"^HTTP/(?:1\\.1|2) (?<code>\\d+).*$",
Pattern.CANON_EQ | Pattern.DOTALL | Pattern.CASE_INSENSITIVE
);
/**
* Origin response.
*/
private final Response rsp;
/**
* Ctor.
* @param response Origin takes response
*/
ResponseOf(final Response response) {
this.rsp = response;
}
/**
* Apply to servlet response.
* @param sresp Servlet response
* @throws IOException If fails
*/
public void applyTo(final HttpServletResponse sresp) throws IOException {
final Iterator<String> head = this.rsp.head().iterator();
final Matcher matcher = ResponseOf.HTTP_MATCHER.matcher(head.next());
if (matcher.matches()) {
sresp.setStatus(Integer.parseInt(matcher.group(1)));
while (head.hasNext()) {
ResponseOf.applyHeader(sresp, head.next());
}
try (
final InputStream body = this.rsp.body();
final OutputStream out = sresp.getOutputStream()
) {
final byte[] buff = new byte[ResponseOf.BUFSIZE];
// @checkstyle LineLengthCheck (1 line)
for (int read = body.read(buff); read >= 0; read = body.read(buff)) {
out.write(buff);
}
}
} else {
throw new IOException("Invalid response: response code not found");
}
}
/**
* Apply header to servlet response.
* @param sresp Response
* @param header Header
*/
@SuppressWarnings("PMD.AvoidInstantiatingObjectsInLoops")
private static void applyHeader(final HttpServletResponse sresp,
final String header) {
final String[] parts = header.split(":");
final String name = parts[0].trim();
final String val = parts[1].trim();
if ("set-cookie".equals(name.toLowerCase(Locale.getDefault()))) {
for (final HttpCookie cck : HttpCookie.parse(header)) {
sresp.addCookie(
new Cookie(cck.getName(), cck.getValue())
);
}
} else {
sresp.setHeader(name, val);
}
}
}