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Code Issues Actions 2 Packages Projects Releases Wiki Activity

Polish 

Issue: SPR-15206
This commit is contained in:
Brian Clozel 2017-02-09 22:36:28 +01:00
parent e4be7131ca
commit 5488906d0c
2 changed files with 86 additions and 46 deletions
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58
spring-web/src/main/java/org/springframework/web/filter/reactive/HiddenHttpMethodFilter.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2017 the original author or authors.
* Copyright 2002-2017 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.
@ -13,26 +13,28 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.filter.reactive;
import java.util.Locale;
import reactor.core.publisher.Mono;
import org.springframework.http.HttpMethod;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
import java.util.Locale;
import java.util.Optional;
/**
* Reactive {@link WebFilter} that converts posted method parameters into HTTP methods,
* retrievable via {@link ServerHttpRequest#getMethod()}. Since browsers currently only
* support GET and POST, a common technique - used by the Prototype library, for instance -
* is to use a normal POST with an additional hidden form field ({@code _method})
* to pass the "real" HTTP method along. This filter reads that parameter and changes
* the {@link ServerHttpRequest#getMethod()} return value using {@link ServerWebExchange#mutate()}.
* support GET and POST, a common technique is to use a normal POST with an additional
* hidden form field ({@code _method}) to pass the "real" HTTP method along.
* This filter reads that parameter and changes the {@link ServerHttpRequest#getMethod()}
* return value using {@link ServerWebExchange#mutate()}.
*
* <p>The name of the request parameter defaults to {@code _method}, but can be
* adapted via the {@link #setMethodParam(String) methodParam} property.
@ -61,37 +63,41 @@ public class HiddenHttpMethodFilter implements WebFilter {
*
* @param exchange the current server exchange
* @param chain provides a way to delegate to the next filter
* @return
* @return {@code Mono<Void>} to indicate when request processing is complete
*/
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
if (exchange.getRequest().getMethod() == HttpMethod.POST) {
return exchange.getFormData()
.map(map -> Optional.ofNullable(map.getFirst(methodParam)))
.map(method -> convertedRequest(exchange, method))
.then(convertedExchange -> chain.filter(convertedExchange));
} else {
.map(formData -> {
String method = formData.getFirst(methodParam);
if (StringUtils.hasLength(method)) {
return convertedRequest(exchange, method);
}
else {
return exchange;
}
})
.then(convertedExchange -> chain.filter(convertedExchange));
}
else {
return chain.filter(exchange);
}
}
/**
* Mutate exchange into a new HTTP method.
* Mutate exchange into a new HTTP request method.
*
* @param exchange - original request
* @param method - request HTTP method based on form data
* @param exchange original {@link ServerWebExchange}
* @param method request HTTP method based on form data
* @return a mutated {@link ServerWebExchange}
*/
private ServerWebExchange convertedRequest(ServerWebExchange exchange, Optional<String> method) {
String upperMethod = method
.map(String::toString)
.orElse(HttpMethod.POST.toString())
.toUpperCase(Locale.ENGLISH);
private ServerWebExchange convertedRequest(ServerWebExchange exchange, String method) {
HttpMethod resolved = HttpMethod.resolve(method.toUpperCase(Locale.ENGLISH));
Assert.notNull(resolved, () -> "HttpMethod '" + method + "' is not supported");
return exchange.mutate()
.request(builder -> builder.method(HttpMethod.resolve(upperMethod)))
.build();
.request(builder -> builder.method(resolved))
.build();
}
}

74
spring-web/src/test/java/org/springframework/web/filter/reactive/HiddenHttpMethodFilterTests.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2017 the original author or authors.
* Copyright 2002-2017 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.
@ -13,9 +13,16 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.filter.reactive;
import java.util.Optional;
import org.hamcrest.Matchers;
import org.junit.Test;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
@ -24,14 +31,13 @@ import org.springframework.mock.http.server.reactive.test.MockServerHttpResponse
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilterChain;
import org.springframework.web.server.adapter.DefaultServerWebExchange;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
import java.util.Optional;
import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
/**
* Tests for {@link HiddenHttpMethodFilter}
*
* @author Greg Turnquist
*/
public class HiddenHttpMethodFilterTests {
@ -48,8 +54,22 @@ public class HiddenHttpMethodFilterTests {
};
StepVerifier.create(filter.filter(mockExchange, filterChain))
.expectComplete()
.verify();
.expectComplete()
.verify();
}
@Test
public void filterWithInvalidParameter() {
ServerWebExchange mockExchange = createExchange(Optional.of("INVALID"));
WebFilterChain filterChain = exchange -> Mono.empty();
StepVerifier.create(filter.filter(mockExchange, filterChain))
.consumeErrorWith(error -> {
assertThat(error, Matchers.instanceOf(IllegalArgumentException.class));
assertEquals(error.getMessage(), "HttpMethod 'INVALID' is not supported");
})
.verify();
}
@Test
@ -62,8 +82,22 @@ public class HiddenHttpMethodFilterTests {
};
StepVerifier.create(filter.filter(mockExchange, filterChain))
.expectComplete()
.verify();
.expectComplete()
.verify();
}
@Test
public void filterWithEmptyStringParameter() {
ServerWebExchange mockExchange = createExchange(Optional.of(""));
WebFilterChain filterChain = exchange -> {
assertEquals("Invalid method", HttpMethod.POST, exchange.getRequest().getMethod());
return Mono.empty();
};
StepVerifier.create(filter.filter(mockExchange, filterChain))
.expectComplete()
.verify();
}
@Test
@ -78,15 +112,15 @@ public class HiddenHttpMethodFilterTests {
filter.setMethodParam("_foo");
StepVerifier.create(filter.filter(mockExchange, filterChain))
.expectComplete()
.verify();
.expectComplete()
.verify();
}
@Test
public void filterWithoutPost() {
ServerWebExchange mockExchange = createExchange(Optional.of("DELETE")).mutate()
.request(builder -> builder.method(HttpMethod.PUT))
.build();
.request(builder -> builder.method(HttpMethod.PUT))
.build();
WebFilterChain filterChain = exchange -> {
assertEquals("Invalid method", HttpMethod.PUT, exchange.getRequest().getMethod());
@ -94,8 +128,8 @@ public class HiddenHttpMethodFilterTests {
};
StepVerifier.create(filter.filter(mockExchange, filterChain))
.expectComplete()
.verify();
.expectComplete()
.verify();
}
private ServerWebExchange createExchange(Optional<String> optionalMethod) {
@ -104,12 +138,12 @@ public class HiddenHttpMethodFilterTests {
private ServerWebExchange createExchange(String methodName, Optional<String> optionalBody) {
MockServerHttpRequest.BodyBuilder builder = MockServerHttpRequest
.post("/hotels")
.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
.post("/hotels")
.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
MockServerHttpRequest request = optionalBody
.map(method -> builder.body(methodName + "=" + method))
.orElse(builder.build());
.map(method -> builder.body(methodName + "=" + method))
.orElse(builder.build());
MockServerHttpResponse response = new MockServerHttpResponse();