maven - 添加 CORS 支持后 Tomcat 应用程序启动失败

Question

我有一个 Tomcat 7 项目，它在我的 Eclipse 集成测试服务器上运行得很好，但无法在生产服务器上启动。

它以前也适用于生产环境，但我不得不添加 CORS 支持，这不知何故导致它失败了。

为了添加 CORS 支持，我将其添加到我的 pom.xml

<dependency>
  <groupId>org.apache.tomcat</groupId>
  <artifactId>tomcat-catalina</artifactId>
  <version>8.0.22</version>
  <scope>provided</scope>
</dependency>

这是我的 web.xml

<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

如果我再次删除这些行，它可以在生产服务器上运行，但 CORS 不起作用。

当我尝试启动应用程序时，服务器抛出一个 ClassNotFoundException，这很奇怪，因为类显然存在于 .war 文件中。

catalina 日志声称一些 .jar 文件无法验证，因为“jar 未加载”。 .jars 都在.war 中，所以我不明白为什么会失败。

日志输出:

卡特琳娜日志:

May 19, 2015 9:10:29 AM org.apache.catalina.util.LifecycleBase stop
INFO: The stop() method was called on component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/APIMR]] after stop() had already been called. The second call will be ignored.
May 19, 2015 9:10:29 AM org.apache.catalina.startup.HostConfig deleteRedeployResources
INFO: Undeploying context [/APIMR]
May 19, 2015 9:10:36 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /var/lib/tomcat/webapps/APIMR.war
May 19, 2015 9:10:37 AM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/share/tomcat/webapps/APIMR/WEB-INF/lib/tomcat-el-api-8.0.22.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class
May 19, 2015 9:10:37 AM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/share/tomcat/webapps/APIMR/WEB-INF/lib/tomcat-servlet-api-8.0.22.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
May 19, 2015 9:10:38 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error filterStart
May 19, 2015 9:10:38 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/APIMR] startup failed due to previous errors

本地主机日志:

May 19, 2015 8:22:11 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'dispatcher'
May 19, 2015 8:22:13 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
May 19, 2015 8:22:13 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
May 19, 2015 8:22:13 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@d45f6a5')
May 19, 2015 9:10:05 AM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter CorsFilter
java.lang.ClassNotFoundException: org.apache.catalina.filters.CorsFilter
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    <snip>


May 19, 2015 9:10:38 AM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter CorsFilter
java.lang.ClassNotFoundException: org.apache.catalina.filters.CorsFilter
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    <snip>

有什么建议吗？

Answer 1

服务器将拒绝已经属于服务器运行时的 jar(tomcat-**.jar、servlet*.jar、...)。试试这个 CORS 过滤器:http://mvnrepository.com/artifact/com.thetransactioncompany/cors-filter

pom.xml

<dependency>
 <groupId>com.thetransactioncompany</groupId>
 <artifactId>cors-filter</artifactId>
 <version>2.4</version>
</dependency>

web.xml

<filter>
    <filter-name>CORS</filter-name>
    <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>CORS</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>