spring FormPartEvent 源码
spring FormPartEvent 代码
文件路径：/spring-web/src/main/java/org/springframework/http/codec/multipart/FormPartEvent.java
/*
* Copyright 2002-2022 the original author or 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
*
* 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 permissions and
* limitations under the License.
*/
package org.springframework.http.codec.multipart;
import java.nio.charset.StandardCharsets;
import java.util.function.Consumer;
import reactor.core.publisher.Mono;
import org.springframework.http.ContentDisposition;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Represents an event triggered for a form field. Contains the
* {@linkplain #value() value}, besides the {@linkplain #headers() headers}
* exposed through {@link PartEvent}.
*
* <p>Multipart form fields trigger one {@code FormPartEvent}, as
* {@linkplain PartEvent described here}.
*
* @author Arjen Poutsma
* @since 6.0
*/
public interface FormPartEvent extends PartEvent {
/**
* Return the form field value.
*/
String value();
/**
* Creates a stream with a single {@code FormPartEven} based on the given
* {@linkplain PartEvent#name() name} and {@linkplain #value() value}.
* @param name the name of the part
* @param value the form field value
* @return a single event stream
*/
static Mono<FormPartEvent> create(String name, String value) {
return create(name, value, null);
}
/**
* Creates a stream with a single {@code FormPartEven} based on the given
* {@linkplain PartEvent#name() name} and {@linkplain #value() value}.
* @param name the name of the part
* @param value the form field value
* @param headersConsumer used to change default headers. Can be {@code null}.
* @return a single event stream
*/
static Mono<FormPartEvent> create(String name, String value, @Nullable Consumer<HttpHeaders> headersConsumer) {
Assert.hasLength(name, "Name must not be empty");
Assert.notNull(value, "Value must not be null");
return Mono.fromCallable(() -> {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(new MediaType(MediaType.TEXT_PLAIN, StandardCharsets.UTF_8));
headers.setContentDisposition(ContentDisposition.formData().
name(name)
.build());
if (headersConsumer != null) {
headersConsumer.accept(headers);
}
return DefaultPartEvents.form(headers, value);
});
}
}
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