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BodyTemplate.java
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66 lines (58 loc) · 2.16 KB
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/**
* Copyright 2012-2019 The Feign Authors
*
* 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.
*/
package feign.template;
import feign.Util;
import java.nio.charset.Charset;
import java.util.Map;
/**
* Template for @{@link feign.Body} annotated Templates. Unresolved expressions are preserved as
* literals and literals are not URI encoded.
*/
public final class BodyTemplate extends Template {
private static final String JSON_TOKEN_START = "{";
private static final String JSON_TOKEN_END = "}";
private static final String JSON_TOKEN_START_ENCODED = "%7B";
private static final String JSON_TOKEN_END_ENCODED = "%7D";
private boolean json = false;
/**
* Create a new Body Template.
*
* @param template to parse.
* @return a Body Template instance.
*/
public static BodyTemplate create(String template) {
return new BodyTemplate(template, Util.UTF_8);
}
private BodyTemplate(String value, Charset charset) {
super(value, ExpansionOptions.ALLOW_UNRESOLVED, EncodingOptions.NOT_REQUIRED, false, charset);
if (value.startsWith(JSON_TOKEN_START_ENCODED) && value.endsWith(JSON_TOKEN_END_ENCODED)) {
this.json = true;
}
}
@Override
public String expand(Map<String, ?> variables) {
String expanded = super.expand(variables);
if (this.json) {
/* decode only the first and last character */
StringBuilder sb = new StringBuilder();
sb.append(JSON_TOKEN_START);
sb.append(expanded,
expanded.indexOf(JSON_TOKEN_START_ENCODED) + JSON_TOKEN_START_ENCODED.length(),
expanded.lastIndexOf(JSON_TOKEN_END_ENCODED));
sb.append(JSON_TOKEN_END);
return sb.toString();
}
return expanded;
}
}