improve utils

scm-web-api/src/main/java/sonia/scm/web/cgi/AbstractCGIServlet.java

@@ -0,0 +1,148 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+
+
+package sonia.scm.web.cgi;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.File;
+import java.io.IOException;
+
+import java.util.Enumeration;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public abstract class AbstractCGIServlet extends HttpServlet
+{
+
+  /** Field description */
+  private static final long serialVersionUID = -8638099037069714140L;
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param req
+   *
+   * @return
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  protected abstract File getCommand(HttpServletRequest req)
+          throws ServletException, IOException;
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @throws ServletException
+   */
+  @Override
+  public void init() throws ServletException
+  {
+    cgiRunner = new CGIRunner(getServletContext(), createEnvironment(),
+                              getCmdPrefix(), isExitStateIgnored());
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  protected EnvList createEnvironment()
+  {
+    EnvList env = new EnvList();
+    Enumeration e = getInitParameterNames();
+
+    while (e.hasMoreElements())
+    {
+      String n = (String) e.nextElement();
+
+      if ((n != null) && n.startsWith("ENV_"))
+      {
+        env.set(n.substring(4), getInitParameter(n));
+      }
+    }
+
+    if (!env.containsKey("SystemRoot"))
+    {
+      String os = System.getProperty("os.name");
+
+      if ((os != null) && (os.toLowerCase().indexOf("windows") != -1))
+      {
+        env.set("SystemRoot", "C:\\WINDOWS");
+      }
+    }
+
+    return env;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param req
+   * @param resp
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  @Override
+  protected void service(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException
+  {
+    cgiRunner.exec(getCommand(req), req.getPathInfo(), req, resp);
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  protected String getCmdPrefix()
+  {
+    return null;
+  }
+
+  ;
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  protected boolean isExitStateIgnored()
+  {
+    return false;
+  }
+
+  ;
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private CGIRunner cgiRunner;
+}