OneCoder使用Restlet最新版2.1.4开发样例，却一直抛出异常：
Exception in thread “main” java.lang.IllegalArgumentException : The serialized representation must have this media type: application/x-java-serialized-object or this one: application/x-java-serialized-object+xml
at org.restlet.representation.ObjectRepresentation.(ObjectRepresentation.java:203)
at org.restlet.representation.Objec tRepresentation.(ObjectRepresentation.java:114)
无论怎么设置MediaType都无效，无奈只能查看次构造函数的源码：
public ObjectRepresentation(Representation serializedRepresentation,
final ClassLoader classLoader) throws IOException,
ClassNotFoundException, IllegalArgumentException {
super(MediaType.APPLICATION_JAVA_OBJECT);
if (serializedRepresentation.getMediaType().equals(
MediaType. APPLICATION_JAVA_OBJECT)) {
if (!VARIANT_OBJECT_BINARY_SUPPORTED ) {
throw new IllegalArgumentException(
"SECURITY WARNING: The usage of ObjectInputStream when "
+ "deserializing binary presentations from unstrusted "
+ "sources can lead to malicious attacks. As pointed "
+ "here (https://github.com/restlet/restlet-framework-java/issues/778), "
+ "the ObjectInputStream class is able to force the JVM to execute unwanted "
+ "Java code. Thus, the support of such format has been disactivated "
+ "by default. You can activate this support by turning on the following system property: "
+ "org.restlet.representation.ObjectRepresentation.VARIANT_OBJECT_BINARY_SUPPORTED." );
}
setMediaType(MediaType.APPLICATION_JAVA_OBJECT );
InputStream is = serializedRepresentation.getStream();
ObjectInputStream ois = null;
if (classLoader != null) {
ois = new ObjectInputStream(is) {
@Override
protected Class<?> resolveClass(
java.io.ObjectStreamClass desc)
throws java.io.IOException,
java.lang.ClassNotFoundException {
return Class
. forName(desc.getName(), false, classLoader);
}
};
} else {
ois = new ObjectInputStream(is);
}
this.object = (T) ois.readObject();
if (is.read() != -1) {
throw new IOException(
"The input stream has not been fully read.");
}
ois.close();
} else if (VARIANT_OBJECT_XML_SUPPORTED
&& serializedRepresentation.getMediaType().equals(
MediaType.APPLICATION_JAVA_OBJECT_XML )) {
if (!VARIANT_OBJECT_XML_SUPPORTED ) {
throw new IllegalArgumentException(
"SECURITY WARNING: The usage of XMLDecoder when "
+ "deserializing XML presentations from unstrusted "
+ "sources can lead to malicious attacks. As pointed "
+ "here (http://blog.diniscruz.com/2013/08/using-xmldecoder-to-execute-server-side.html), "
+ "the XMLDecoder class is able to force the JVM to "
+ "execute unwanted Java code described inside the XML "
+ "file. Thus, the support of such format has been "
+ "disactivated by default. You can activate this "
+ "support by turning on the following system property: "
+ "org.restlet.representation.ObjectRepresentation.VARIANT_OBJECT_XML_SUPPORTED." );
}
setMediaType(MediaType.APPLICATION_JAVA_OBJECT_XML );
InputStream is = serializedRepresentation.getStream();
java.beans.XMLDecoder decoder = new java.beans.XMLDecoder(is);
this.object = (T) decoder.readObject();
if (is.read() != -1) {
throw new IOException(
"The input stream has not been fully read.");
}
decoder.close();
}
throw new IllegalArgumentException(
"The serialized representation must have this media type: "
+ MediaType.APPLICATION_JAVA_OBJECT .toString()
+ " or this one: "
+ MediaType.APPLICATION_JAVA_OBJECT_XML .toString());
}
惊呆的发现，最后的throw new IllegalArgumentException 逻辑被赤裸裸的暴露在外面，也就是不论上面走的是if还是else，最终都会走到这里抛出异常结束。这不免让我一头雾水，回头查看2.1.2版本的源码，发现抛出异常的代码是写在最后的else块里的，这可就大不相同了。
我只能以我目前粗浅的了解，怀疑这是restlet的一个粗心的bug，我已经给restlet发了邮件咨询了该问题，等待回复中。目前，我也只能降到2.1.2版本的restlet进行开发，在2.1.2版上无此问题。
注：已确认是bug。
