[英]PATCH request using Jersey Client
我想执行我们的服务器支持的 PATCH 请求,以便使用 Jersey 客户端进行测试。 我的代码如下,但我得到com.sun.jersey.api.client.ClientHandlerException: java.net.ProtocolException: HTTP method PATCH doesn't support output
exception。 有人可以让我知道下面的代码有什么问题吗?
String complete_url = "http://localhost:8080/api/request";
String request = "[{\"op\":\"add\", \"path\":\"/name\", \"value\":\"Hello\"}]";
DefaultClientConfig config = new DefaultClientConfig();
config.getProperties().put(URLConnectionClientHandler.PROPERTY_HTTP_URL_CONNECTION_SET_METHOD_WORKAROUND, true);
Client client = Client.create(config);
WebResource resource = client.resource(complete_url);
ClientResponse response = resource.header("Authorization", "Basic xyzabCDef")
.type(new MediaType("application", "json-patch+json"))
.method("PATCH", ClientResponse.class, request);
这是完整的例外,
com.sun.jersey.api.client.ClientHandlerException: java.net.ProtocolException: HTTP method PATCH doesn't support output
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:155)
at com.sun.jersey.api.client.Client.handle(Client.java:652)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682)
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.method(WebResource.java:634)
at com.acceptance.common.PatchTest.patch(PatchTest.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.net.ProtocolException: HTTP method PATCH doesn't support output
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1021)
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler$1$1.getOutputStream(URLConnectionClientHandler.java:238)
at com.sun.jersey.api.client.CommittingOutputStream.commitStream(CommittingOutputStream.java:117)
at com.sun.jersey.api.client.CommittingOutputStream.write(CommittingOutputStream.java:89)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:276)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
at java.io.BufferedWriter.flush(BufferedWriter.java:236)
at com.sun.jersey.core.util.ReaderWriter.writeToAsString(ReaderWriter.java:191)
at com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider.writeToAsString(AbstractMessageReaderWriterProvider.java:128)
at com.sun.jersey.core.impl.provider.entity.StringProvider.writeTo(StringProvider.java:88)
at com.sun.jersey.core.impl.provider.entity.StringProvider.writeTo(StringProvider.java:58)
at com.sun.jersey.api.client.RequestWriter.writeRequestEntity(RequestWriter.java:300)
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler._invoke(URLConnectionClientHandler.java:217)
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:153)
仅供参考 - 以防万一有人在 Jersey 2 中遇到此问题,请参阅HttpUrlConnectorProvider 文档
并使用 SET_METHOD_WORKAROUND 属性如下:
Client jerseyClient = ClientBuilder.newClient()
.property(HttpUrlConnectorProvider.SET_METHOD_WORKAROUND, true)
... etc ...
我花了很长时间才找到这个 - 认为我可以帮助缩短其他人的学习曲线。
如果您使用的是HttpsUrlConnection
(注意's' ) - 那么设置HttpUrlConnectorProvider.SET_METHOD_WORKAROUND
将不起作用。 继续阅读以获取详细的解决方案。
就我而言,设置HttpUrlConnectorProvider.SET_METHOD_WORKAROUND
属性会导致NoSuchFieldException
因为我的HttpUrlConnection
实例实际上是类型: sun.net.www.protocol.https.HttpsURLConnectionImpl
并且它是超级: javax.net.ssl.HttpsURLConnection
(从HttpUrlConnection
继承)。
因此,当 Jackson 代码尝试从我的连接实例 super( javax.net.ssl.HttpsURLConnection
实例)获取方法字段时:
/**
* Workaround for a bug in {@code HttpURLConnection.setRequestMethod(String)}
* The implementation of Sun/Oracle is throwing a {@code ProtocolException}
* when the method is other than the HTTP/1.1 default methods. So to use {@code PROPFIND}
* and others, we must apply this workaround.
*
* See issue http://java.net/jira/browse/JERSEY-639
*/
private static void setRequestMethodViaJreBugWorkaround(final HttpURLConnection httpURLConnection, final String method) {
try {
httpURLConnection.setRequestMethod(method); // Check whether we are running on a buggy JRE
} catch (final ProtocolException pe) {
try {
final Class<?> httpURLConnectionClass = httpURLConnection.getClass();
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
@Override
public Object run() throws NoSuchFieldException, IllegalAccessException {
final Field methodField = httpURLConnectionClass.getSuperclass().getDeclaredField("method");
methodField.setAccessible(true);
methodField.set(httpURLConnection, method);
return null;
}
});
} catch (final PrivilegedActionException e) {
final Throwable cause = e.getCause();
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
} else {
throw new RuntimeException(cause);
}
}
}
}
我们得到一个NoSuchFieldException
,表明一个名为method
的字段不存在(因为 getDeclaredFields() 带来了所有字段,无论它们的可访问性如何,但仅适用于当前类,而不是当前类可能继承的任何基类)。
所以我查看了 Java 的 HttpUrlConnection 代码,发现允许的方法是由私有静态String[] 指定的:
/* Adding PATCH to the valid HTTP methods */
private static final String[] methods = {
"GET", "POST", "HEAD", "OPTIONS", "PUT", "DELETE", "TRACE"
};
解决方案是使用反射更改此方法数组:
try {
Field methodsField = HttpURLConnection.class.getDeclaredField("methods");
methodsField.setAccessible(true);
// get the methods field modifiers
Field modifiersField = Field.class.getDeclaredField("modifiers");
// bypass the "private" modifier
modifiersField.setAccessible(true);
// remove the "final" modifier
modifiersField.setInt(methodsField, methodsField.getModifiers() & ~Modifier.FINAL);
/* valid HTTP methods */
String[] methods = {
"GET", "POST", "HEAD", "OPTIONS", "PUT", "DELETE", "TRACE", "PATCH"
};
// set the new methods - including patch
methodsField.set(null, methods);
} catch (SecurityException | IllegalArgumentException | IllegalAccessException | NoSuchFieldException e) {
e.printStackTrace();
}
由于 methods 字段是静态的,因此更改其值适用于扩展HttpUrlConnection
任何具体实例,包括HttpsUrlConnection
。
旁注:我更喜欢 Java 将 PATCH 方法添加到 JDK 或从 Jackson 添加到他们的解决方法中的整个层次结构中执行字段查找。
无论如何,我希望这个解决方案可以为您节省一些时间。
这是当前 JDK 实现中的一个错误,已在 JDK8 实现中修复。查看此链接了解详细信息https://bugs.openjdk.java.net/browse/JDK-7157360 。 有一种方法可以解决这个问题,但 Jersey 团队决定不修复它https://github.com/eclipse-ee4j/jersey/issues/1639
我能想到的2个解决方案
简单的答案是:
依赖关系
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.core/jersey-client -->
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>2.27</version>
</dependency>
需要添加HttpUrlConnectorProvider.SET_METHOD_WORKAROUND
= true
Client client = ClientBuilder.newClient(clientConfig).property(HttpUrlConnectorProvider.SET_METHOD_WORKAROUND, true);
要求
client.target("base_url").path("end_point").request().headers("your_headers")
.build("PATCH", Entity.entity("body_you_want_to_pass", "content-type"))
.invoke();
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