From c8b4b7f8f9aa2ada52a57d3b3142332fb52169d4 Mon Sep 17 00:00:00 2001
From: Sebastian Sdorra <sebastian.sdorra@cloudogu.com>
Date: Sat, 23 Oct 2010 13:00:13 +0200
Subject: [PATCH] improve GitCGIServlet

---
 .../java/sonia/scm/web/GitCGIServlet.java     | 92 ++++++++++++++++++-
 .../main/resources/sonia/scm/git.index.html   | 58 ++++++++++++
 2 files changed, 148 insertions(+), 2 deletions(-)
 create mode 100644 plugins/scm-git-plugin/src/main/resources/sonia/scm/git.index.html

diff --git a/plugins/scm-git-plugin/src/main/java/sonia/scm/web/GitCGIServlet.java b/plugins/scm-git-plugin/src/main/java/sonia/scm/web/GitCGIServlet.java
index 7da4f5114b..753bb2299d 100644
--- a/plugins/scm-git-plugin/src/main/java/sonia/scm/web/GitCGIServlet.java
+++ b/plugins/scm-git-plugin/src/main/java/sonia/scm/web/GitCGIServlet.java
@@ -14,6 +14,7 @@ import com.google.inject.Singleton;
 
 import sonia.scm.repository.GitConfig;
 import sonia.scm.repository.GitRepositoryHandler;
+import sonia.scm.util.IOUtil;
 import sonia.scm.web.cgi.AbstractCGIServlet;
 import sonia.scm.web.cgi.EnvList;
 
@@ -21,9 +22,12 @@ import sonia.scm.web.cgi.EnvList;
 
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 /**
  *
@@ -39,6 +43,16 @@ public class GitCGIServlet extends AbstractCGIServlet
   /** Field description */
   public static final String ENV_PROJECT_ROOT = "GIT_PROJECT_ROOT";
 
+  /** Field description */
+  public static final String MIMETYPE_HTML = "text/html";
+
+  /** Field description */
+  public static final String REGEX_GITHTTPBACKEND =
+    "(?x)^/git/(.*/(HEAD|info/refs|objects/(info/[^/]+|[0-9a-f]{2}/[0-9a-f]{38}|pack/pack-[0-9a-f]{40}\\.(pack|idx))|git-(upload|receive)-pack))$";
+
+  /** Field description */
+  public static final String RESOURCE_GITINDEX = "/sonia/scm/git.index.html";
+
   /** Field description */
   private static final long serialVersionUID = 9147517765161830847L;
 
@@ -90,13 +104,40 @@ public class GitCGIServlet extends AbstractCGIServlet
     return env;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  @Override
+  protected void service(HttpServletRequest request,
+                         HttpServletResponse response)
+          throws ServletException, IOException
+  {
+    String uri = getRelativePath(request);
+
+    if (uri.matches(REGEX_GITHTTPBACKEND))
+    {
+      super.service(request, response);
+    }
+    else
+    {
+      printGitInformation(response);
+    }
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**
    * Method description
    *
    *
-   * @param req
+   * @param request
    *
    * @return
    *
@@ -104,7 +145,7 @@ public class GitCGIServlet extends AbstractCGIServlet
    * @throws ServletException
    */
   @Override
-  protected File getCommand(HttpServletRequest req)
+  protected File getCommand(HttpServletRequest request)
           throws ServletException, IOException
   {
     GitConfig config = repositoryHandler.getConfig();
@@ -117,6 +158,53 @@ public class GitCGIServlet extends AbstractCGIServlet
     return new File(config.getGitHttpBackend());
   }
 
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param response
+   *
+   * @throws IOException
+   * @throws ServletException
+   */
+  private void printGitInformation(HttpServletResponse response)
+          throws ServletException, IOException
+  {
+    response.setContentType(MIMETYPE_HTML);
+
+    InputStream input = null;
+    OutputStream output = null;
+
+    try
+    {
+      input = GitCGIServlet.class.getResourceAsStream(RESOURCE_GITINDEX);
+      output = response.getOutputStream();
+      IOUtil.copy(input, output);
+    }
+    finally
+    {
+      IOUtil.close(input);
+      IOUtil.close(output);
+    }
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   *
+   * @return
+   */
+  private String getRelativePath(HttpServletRequest request)
+  {
+    return request.getRequestURI().substring(request.getContextPath().length());
+  }
+
   //~--- fields ---------------------------------------------------------------
 
   /** Field description */
diff --git a/plugins/scm-git-plugin/src/main/resources/sonia/scm/git.index.html b/plugins/scm-git-plugin/src/main/resources/sonia/scm/git.index.html
new file mode 100644
index 0000000000..4adbcf280d
--- /dev/null
+++ b/plugins/scm-git-plugin/src/main/resources/sonia/scm/git.index.html
@@ -0,0 +1,58 @@
+<html>
+  <head>
+    <title>SCM :: Manager - Git Repository</title>
+    <style type="text/css">
+      body {
+        background-color: #ffffff;
+        font-size: 12px;
+        font-family: Verdana, "Verdana CE",  Arial, "Arial CE", "Lucida Grande CE", lucida, "Helvetica CE", sans-serif;
+        color: #000000;
+        margin: 10px;
+      }
+
+      h1, h2, h3, h4, h5 {
+        font-family: Arial, "Arial CE", "Lucida Grande CE", lucida, "Helvetica CE", sans-serif;
+        font-weight: bold;
+        margin: 0px;
+        padding: 0px;
+        color: #D20005;
+      }
+
+      h1 {
+        font-size:  18px;
+        border-bottom: 1px solid #AFAFAF;
+      }
+
+      h2 {
+        font-size:  16px;
+      }
+
+      h3 {
+        font-size:  14px;
+      }
+
+      a:link, a:visited {
+        color: #045491;
+        font-weight : bold;
+        text-decoration: none;
+      }
+      
+      a:link:hover, a:visited:hover  {
+        color: #045491;
+        font-weight : bold;
+        text-decoration : underline;
+      }
+    </style>
+  </head>
+  <body>
+
+    <h1>SCM :: Manager - Git Repository</h1>
+    
+    <ul>
+      <li><a href="http://git-scm.com/" target="_blank">Git Homepage</a></li>
+      <li><a href="http://www.kernel.org/pub/software/scm/git/docs/gittutorial.html" target="_blank">Git Tutorial</a></li>
+      <li><a href="http://www.kernel.org/pub/software/scm/git/docs/user-manual.html" target="_blank">Git User's Manual</a></li>
+    </ul>
+
+  </body>
+</html>
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