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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* ============LICENSE_START=======================================================
* rest
* ================================================================================
* Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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
*
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.rest;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Map.Entry;
import javax.xml.bind.DatatypeConverter;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RestManager {
private static final Logger logger = LoggerFactory.getLogger(RestManager.class);
public class Pair<A, B> {
public final A first;
public final B second;
public Pair(A first, B second) {
this.first = first;
this.second = second;
}
}
/**
* Perform REST PUT.
*
* @param url the url
* @param username the user name
* @param password the password
* @param headers any headers
* @param contentType what the content type is
* @param body body to send
* @return the response status code and the body
*/
public Pair<Integer, String> put(String url, String username, String password,
Map<String, String> headers, String contentType, String body) {
HttpPut put = new HttpPut(url);
addHeaders(put, username, password, headers);
put.addHeader("Content-Type", contentType);
try {
StringEntity input = new StringEntity(body);
input.setContentType(contentType);
put.setEntity(input);
} catch (Exception e) {
logger.error("put threw: ", e);
return null;
}
return sendRequest(put);
}
/**
* Perform REST Post.
*
* @param url the url
* @param username the user name
* @param password the password
* @param headers any headers
* @param contentType what the content type is
* @param body body to send
* @return the response status code and the body
*/
public Pair<Integer, String> post(String url, String username, String password,
Map<String, String> headers, String contentType, String body) {
HttpPost post = new HttpPost(url);
addHeaders(post, username, password, headers);
post.addHeader("Content-Type", contentType);
try {
StringEntity input = new StringEntity(body);
input.setContentType(contentType);
post.setEntity(input);
} catch (Exception e) {
logger.error("post threw: ", e);
return null;
}
return sendRequest(post);
}
/**
* Do a REST get.
*
* @param url URL
* @param username user name
* @param password password
* @param headers any headers to add
* @return a Pair for the response status and the body
*/
public Pair<Integer, String> get(String url, String username, String password,
Map<String, String> headers) {
HttpGet get = new HttpGet(url);
addHeaders(get, username, password, headers);
return sendRequest(get);
}
/**
* Perform REST Delete. <br/>
* <i>Note: Many REST endpoints will return a 400 error for delete requests with a non-empty body</i>
*
* @param url the url
* @param username the user name
* @param password the password
* @param headers any headers
* @param contentType what the content type is
* @param body body (optional) to send
* @return the response status code and the body
*/
public Pair<Integer, String> delete(String url, String username, String password, Map<String, String> headers,
String contentType, String body) {
HttpDeleteWithBody delete = new HttpDeleteWithBody(url);
addHeaders(delete, username, password, headers);
if (body != null && !body.isEmpty()) {
delete.addHeader("Content-Type", contentType);
try {
StringEntity input = new StringEntity(body);
input.setContentType(contentType);
delete.setEntity(input);
} catch (Exception e) {
logger.error("delete threw: ", e);
return null;
}
}
return sendRequest(delete);
}
/**
* Perform REST Delete.
*
* @param url the url
* @param username the user name
* @param password the password
* @param headers any headers
* @return the response status code and the body
*/
public Pair<Integer, String> delete(String url, String username, String password, Map<String, String> headers) {
HttpDelete delete = new HttpDelete(url);
addHeaders(delete, username, password, headers);
return sendRequest(delete);
}
/**
* Send REST request.
*
* @param request http request to send
* @return the response status code and the body
*/
private Pair<Integer, String> sendRequest(HttpRequestBase request) {
if (logger.isDebugEnabled()) {
logger.debug("***** sendRequest to url {}:", request.getURI());
}
try (CloseableHttpClient client =
HttpClientBuilder
.create()
.setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
.build()) {
HttpResponse response = client.execute(request);
if (response != null) {
String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
logger.debug("HTTP Response Status Code: {}",
response.getStatusLine().getStatusCode());
logger.debug("HTTP Response Body:");
logger.debug(returnBody);
return new Pair<>(response.getStatusLine().getStatusCode(),
returnBody);
} else {
logger.error("Response from {} is null", request.getURI());
return null;
}
} catch (Exception e) {
logger.error("Request failed to {}", request.getURI(), e);
return null;
}
}
/**
* Add header to the request.
*
* @param request http request to send
* @param username the user name
* @param password the password
* @param headers any headers
*/
private void addHeaders(HttpRequestBase request, String username, String password, Map<String,
String> headers) {
String authHeader = makeAuthHeader(username, password);
if (headers != null) {
for (Entry<String, String> entry : headers.entrySet()) {
request.addHeader(entry.getKey(), headers.get(entry.getKey()));
}
}
if (authHeader != null) {
request.setHeader(HttpHeaders.AUTHORIZATION, authHeader);
}
}
private String makeAuthHeader(String username, String password) {
if (username == null || username.isEmpty()) {
return null;
}
String auth = username + ":" + (password == null ? "" : password);
return "Basic " + DatatypeConverter.printBase64Binary(auth.getBytes(Charset.forName("ISO-8859-1")));
}
}
|