1 /*
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 *
14 */
15
16 package org.esigate.http;
17
18 import java.util.Collection;
19 import java.util.Properties;
20
21 import org.apache.http.HttpHeaders;
22 import org.apache.http.HttpResponse;
23 import org.esigate.Parameters;
24
25 public class ContentTypeHelper {
26 private Collection<String> parsableContentTypes;
27
28 public ContentTypeHelper(Properties properties) {
29 parsableContentTypes = Parameters.PARSABLE_CONTENT_TYPES.getValue(properties);
30 }
31
32 /**
33 * Check whether the given request's content-type corresponds to "parseable" text.
34 *
35 * @param httpResponse
36 * the response to analyze depending on its content-type
37 * @return true if this represents text or false if not
38 */
39 public boolean isTextContentType(HttpResponse httpResponse) {
40 String contentType = HttpResponseUtils.getFirstHeader(HttpHeaders.CONTENT_TYPE, httpResponse);
41 return isTextContentType(contentType);
42 }
43
44 /**
45 * Check whether the given content-type corresponds to "parseable" text.
46 *
47 * @param contentType
48 * the input content-type
49 * @return true if this represents text or false if not
50 */
51 public boolean isTextContentType(String contentType) {
52 if (contentType != null) {
53 String lowerContentType = contentType.toLowerCase();
54 for (String textContentType : this.parsableContentTypes) {
55 if (lowerContentType.startsWith(textContentType)) {
56 return true;
57 }
58 }
59 }
60 return false;
61 }
62
63 }