-
-
Notifications
You must be signed in to change notification settings - Fork 15
/
HrrsUrlEncodedFormHelper.java
155 lines (143 loc) · 6.29 KB
/
HrrsUrlEncodedFormHelper.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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*
* Copyright 2016-2024 Volkan Yazıcı
*
* Licensed 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
*
* https://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 permits and
* limitations under the License.
*/
package com.vlkan.hrrs.servlet;
import com.vlkan.hrrs.api.HttpRequestPayload;
import com.vlkan.hrrs.api.ImmutableHttpRequestPayload;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Collections;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
public class HrrsUrlEncodedFormHelper {
private static final Logger LOGGER = LoggerFactory.getLogger(HrrsUrlEncodedFormHelper.class);
public HrrsUrlEncodedFormHelper() {
// Do nothing.
}
public boolean isUrlEncodedForm(String contentType) {
if (contentType == null) {
return false;
}
int semicolon = contentType.indexOf(';');
if (semicolon >= 0) {
contentType = contentType.substring(0, semicolon).trim();
} else {
contentType = contentType.trim();
}
return "application/x-www-form-urlencoded".equals(contentType);
}
public HttpRequestPayload extractUrlEncodedFormPayload(HttpServletRequest request, String defaultEncoding) {
byte[] encodedFormParameterBytes = encodeFormParameters(request, defaultEncoding);
return ImmutableHttpRequestPayload
.newBuilder()
.setMissingByteCount(0)
.setBytes(encodedFormParameterBytes)
.build();
}
private byte[] encodeFormParameters(HttpServletRequest request, String defaultEncoding) {
try {
String encoding = request.getCharacterEncoding();
if (encoding == null) {
encoding = defaultEncoding;
}
Map<String, List<String>> formParameters = parseFormParameters(request, encoding);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(outputStream, encoding);
boolean firstFormParameter = true;
for (Map.Entry<String, List<String>> formParameter : formParameters.entrySet()) {
String formParameterName = formParameter.getKey();
String encodedFormParameterName = URLEncoder.encode(formParameterName, encoding);
for (String formParameterValue : formParameter.getValue()) {
String encodedFormParameterValue = URLEncoder.encode(formParameterValue, encoding);
if (firstFormParameter) {
firstFormParameter = false;
} else {
writer.write('&');
}
writer.write(encodedFormParameterName);
writer.write('=');
writer.write(encodedFormParameterValue);
}
}
writer.close();
return outputStream.toByteArray();
} catch (Throwable error) {
LOGGER.error("failed to encode form parameters", error);
return new byte[0];
}
}
private Map<String, List<String>> parseFormParameters(HttpServletRequest request, String encoding) {
Map<String, List<String>> queryParameters = parseQueryParameters(request, encoding);
Map<String, List<String>> formParameters = Collections.emptyMap();
Enumeration<String> parametersEnum = request.getParameterNames();
while (parametersEnum.hasMoreElements()) {
String name = parametersEnum.nextElement();
List<String> queryParameterValues = queryParameters.get(name);
String[] parameterValues = request.getParameterValues(name);
List<String> formParameterValues = new LinkedList<>();
for (String parameterValue : parameterValues) {
if (queryParameterValues == null || !queryParameterValues.contains(parameterValue)) {
formParameterValues.add(parameterValue);
}
}
if (formParameters.isEmpty()) {
formParameters = new LinkedHashMap<>();
}
formParameters.put(name, formParameterValues);
}
return formParameters;
}
private Map<String, List<String>> parseQueryParameters(HttpServletRequest request, String encoding) {
String queryString = request.getQueryString();
if (HrrsHelper.isBlank(queryString)) {
return Collections.emptyMap();
}
String[] entries = queryString.split("&");
if (entries.length == 0) {
return Collections.emptyMap();
}
Map<String, List<String>> map = new LinkedHashMap<>();
for (String entry : entries) {
try {
int splitterIndex = entry.indexOf('=');
String key;
String value;
if (splitterIndex < 0) {
key = URLDecoder.decode(entry, encoding);
value = null;
} else {
String encodedKey = entry.substring(0, splitterIndex);
key = URLDecoder.decode(encodedKey, encoding);
String encodedValue = entry.substring(splitterIndex + 1);
value = URLDecoder.decode(encodedValue, encoding);
}
map.computeIfAbsent(key, ignored -> new LinkedList<>()).add(value);
} catch (UnsupportedEncodingException error) {
String message = String.format("failed to read query parameter (entry=%s)", entry);
LOGGER.error(message, error);
}
}
return map;
}
}