我目前正在学习如何使用Java代理启动用于监视的Web应用程序。
我选择的web应用程序是WebGoat，运行webgoat的readme中所述的java -jar webgoat-server-8.0.0.M17.jar非常好。
但是，当我尝试添加我的代理时，会出现以下错误日志混乱：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.12.RELEASE)
2018-06-06 22:36:08.528 INFO 3741 --- [ main] org.owasp.webgoat.StartWebGoat : Starting StartWebGoat v8.0.0.M17 on MacBook-Pro.local with PID 3741 (/Users/andrewfan/Desktop/Lang Agent Dev Proj help info/webgoat-server-8.0.0.M17.jar started by andrewfan in /Users/andrewfan/Desktop/Lang Agent Dev Proj help info)
2018-06-06 22:36:08.531 INFO 3741 --- [ main] org.owasp.webgoat.StartWebGoat : No active profile set, falling back to default profiles: default
2018-06-06 22:36:08.844 INFO 3741 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@1376c05c: startup date [Wed Jun 06 22:36:08 EDT 2018]; root of context hierarchy
2018-06-06 22:36:11.354 INFO 3741 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$8e12590a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-06-06 22:36:11.442 WARN 3741 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConfiguration': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'webgoat.user.directory' in value "${webgoat.user.directory}"
2018-06-06 22:36:11.455 INFO 3741 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-06-06 22:36:11.464 ERROR 3741 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConfiguration': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'webgoat.user.directory' in value "${webgoat.user.directory}"
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) ~[spring-beans-4.3.16.RELEASE.jar!/:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1268) ~[spring-beans-4.3.16.RELEASE.jar!/:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.16.RELEASE.jar!/:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.16.RELEASE.jar!/:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) ~[spring-beans-4.3.16.RELEASE.jar!/:4.3.16.RELEASE]
at
…
我缩短了错误消息，因为跟踪只有几页长，但主要错误似乎是
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConfiguration': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'webgoat.user.directory' in value "${webgoat.user.directory}"我正在按如下方式管理我的代理人：
java -javaagent:/Users/path/to/jar/Spn-LangAgent-0.0.jar -jar webgoat-server-8.0.0.M17.jar --server.port=8080 --server.address=localhost我的代理人如下：
package com.spnlangagent.langagent;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.lang.reflect.Field;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.UnmodifiableClassException;
import com.google.monitoring.runtime.instrumentation.AllocationRecorder;
public class LangAgent {
public static void premain(String agentArgs, Instrumentation inst) throws Exception {
System.out.println("LangAgent: premain now running");
setupInstrumentation(agentArgs, inst);
startRuntime(agentArgs);
}
private static void setupInstrumentation(String agentArgs, Instrumentation inst) throws Exception {
System.out.println("setupInstrumentation: now running with agentArgs: " + agentArgs);
}
private static void startRuntime(String agentArgs) throws Exception {
System.out.println("startRuntime: now running with agentArgs: " + agentArgs);
}
}
除了一些打印语句之外，代理的原始内容都被注释掉了，但是即使这样，webgoat在启动时也会崩溃。
我用webgoat尝试了另一个代理，它运行得很好，所以我唯一能想到的是，我的代理或者它的打包方式出了问题。
我正在使用maven，我的manifest.mf如下：
Manifest-Version: 1.0
Premain-Class: com.spnlangagent.langagent.LangAgent
Can-Redefine-Classes: true
Can-Retransform-Classes: true
运行
mvn package之后，.jar中打包的清单如下：Manifest-Version: 1.0
Premain-Class: com.spnlangagent.langagent.LangAgent
Built-By: andrewfan
Can-Redefine-Classes: true
Can-Retransform-Classes: true
Created-By: Apache Maven 3.5.3
Build-Jdk: 1.8.0_172
在pom.xml中，我正在执行以下操作以到达清单：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<archive>
<manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>
</archive>
</configuration>
</plugin>
如果有人能给我指出正确的方向来找出webgoat崩溃的原因，或者有人能提供更多关于我目前所做的事情是错误的原因的见解，那将是非常感谢的。
谢谢您。
注意：如果我的pom.xml的其余部分是调试所必需的，我很乐意提供它；只是问题已经很长了。
最佳答案
webgoat（在大多数基于spring的应用程序中也是如此）依赖于属性文件（通常采用properties或yaml格式）来执行占位符查找。
失败的症状表明spring无法查找占位符处理的属性。
考虑到占位符查找在不存在代理jar的情况下运行良好，并且有了注释中提到的信息，问题是由
代理jar提供了application.properties（与webgoat用于占位符的属性文件有名称冲突）
代理jar将是类路径的一部分，甚至可能出现在主jar之前
你的空“影子”在Webgoat主罐子里。这意味着，当webgoat启动时，spring会提取空的application.properties进行占位符处理，因此失败。