从 Tomcat servlet 连接到 HTTP 服务器时出现 AccessControlException

Question

我试图让我的 tomcat servlet 下载许多文件，但我有 apache 和 tomcat 在同一台服务器上运行，所以我认为这就是它不起作用的原因。我已经在不运行 apache 的服务器上进行了测试，一切都很好。

这是当我尝试使用 new Url( fileUrl ).openStream() 时遇到的异常：

 Opening input stream Attempted to download: http://www.stefankendall.com/files/test.txt java.security.AccessControlException: access denied (java.net.SocketPermission www.stefankendall.com:80 connect,resolve)

如何在运行 apache 的同时通过 tomcat 运行 http 下载？我被困住了吗？

编辑：
无论我做什么，我都无法超越tomcat。这是 03catalina.policy:

// ========== CATALINA 代码权限 ================================ =========

// These permissions apply to the logging API
grant codeBase "file:${catalina.home}/bin/tomcat-juli.jar" {
        permission java.util.PropertyPermission "java.util.logging.config.class", "read";
        permission java.util.PropertyPermission "java.util.logging.config.file", "read";
        permission java.lang.RuntimePermission "shutdownHooks";
        permission java.io.FilePermission "${catalina.base}${file.separator}conf${file.separator}logging.properties", "read";
        permission java.util.PropertyPermission "catalina.base", "read";
        permission java.util.logging.LoggingPermission "control";
        permission java.io.FilePermission "${catalina.base}${file.separator}logs", "read, write";
        permission java.io.FilePermission "${catalina.base}${file.separator}logs${file.separator}*", "read, write";
        permission java.lang.RuntimePermission "getClassLoader";
        // To enable per context logging configuration, permit read access to the appropriate file.
        // Be sure that the logging configuration is secure before enabling such access
        // eg for the examples web application:
        // permission java.io.FilePermission "${catalina.base}${file.separator}webapps${file.separator}examples${file.separator}WEB-INF${file.separator}classes${file.separator}logging.properties", "read";
};

// These permissions apply to the server startup code
grant codeBase "file:${catalina.home}/bin/bootstrap.jar" {
        permission java.security.AllPermission;
 permission java.net.socketPermission "*:80", "connect, resolve";
};

// These permissions apply to the servlet API classes
// and those that are shared across all class loaders
// located in the "lib" directory
grant codeBase "file:${catalina.home}/lib/-" {
        permission java.security.AllPermission;
       permission java.net.socketPermission "*:80", "connect, resolve";
};

grant codeBase "file:${catalina.home}/webapps/-" {
 permission java.security.AllPermission;
 permission java.net.socketPermission "*:80", "connect, resolve";
};

Answer 1

您的问题与同一机器上运行的某些程序的存在或不存在无关；这与 Tomcat 中存在 SecurityManager 有关（这可能意味着您正在运行旧版本的 Tomcat）。

以下是有关如何配置 Tomcat SecurityManager。在您的情况下，您将在 local.policy 文件中添加一些行，如下所示：

grant codeBase "file:${catalina.home}/webapps/-" {
  permission java.net.SocketPermission "*:80", "connect";
};