org.turro.elephant.download.DownloadServlet Class Reference

Inheritance diagram for org.turro.elephant.download.DownloadServlet:

Collaboration diagram for org.turro.elephant.download.DownloadServlet:

Public Member Functions
	DownloadServlet ()
void	init (ServletConfig config) throws ServletException
void	destroy ()
String	getServletInfo ()

Protected Member Functions
void	processRequest (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
void	doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
void	doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException

Detailed Description

Author

Lluis Turró Cutiller lluis.nosp@m.@tur.nosp@m.ro.or.nosp@m.g

Definition at line 42 of file DownloadServlet.java.

Constructor & Destructor Documentation

DownloadServlet()

org.turro.elephant.download.DownloadServlet.DownloadServlet

(

)

Creates a new instance of DownloadServlet

Definition at line 46 of file DownloadServlet.java.

                           {
  }

Member Function Documentation

destroy()

void org.turro.elephant.download.DownloadServlet.destroy

(

)

Destroys the servlet.

Definition at line 60 of file DownloadServlet.java.

                        {
    
  }

doGet()

void org.turro.elephant.download.DownloadServlet.doGet ( HttpServletRequest  request, HttpServletResponse  response  ) throws ServletException, IOException

protected

Handles the HTTP GET method.

Parameters

request	servlet request
response	servlet response

Definition at line 162 of file DownloadServlet.java.

                                       {
    processRequest(request, response);
  }

doPost()

void org.turro.elephant.download.DownloadServlet.doPost ( HttpServletRequest  request, HttpServletResponse  response  ) throws ServletException, IOException

protected

Handles the HTTP POST method.

Parameters

request	servlet request
response	servlet response

Definition at line 172 of file DownloadServlet.java.

                                       {
    processRequest(request, response);
  }

getServletInfo()

String org.turro.elephant.download.DownloadServlet.getServletInfo

(

)

Returns a short description of the servlet.

Definition at line 180 of file DownloadServlet.java.

                                 {
    return "Download servlet";
  }

init()

void org.turro.elephant.download.DownloadServlet.init

(

ServletConfig

config

)

throws ServletException

Initializes the servlet.

Definition at line 52 of file DownloadServlet.java.

                                                                 {
    super.init(config);
    
  }

processRequest()

void org.turro.elephant.download.DownloadServlet.processRequest ( HttpServletRequest  request, HttpServletResponse  response  ) throws ServletException, IOException

protected

Processes requests for both HTTP GET and POST methods.

Parameters

request	servlet request
response	servlet response

Definition at line 68 of file DownloadServlet.java.

                                       {
    constructor = ElephantContext.getConstructor(request, response);
    if(!request.getParameter("down_path").matches("\\@\\-?[0-9\\-]+") && 
            (constructor.getUser() == null || !constructor.getUser().isInRole("download:file"))) {
      return;
    }
    
    response.setHeader("pragma", "no-cache");
    response.setHeader("Cache-control", "no-cache, no-store, must-revalidate");
    response.setHeader("Expires", "01 Apr 1995 01:10:10 GMT");
 
    // set download attributes
    String file = request.getParameter("down_file"),
           path = request.getParameter("down_path");
    if(file == null) file = (String) constructor.findAttribute("xp_down_file");
    if(path != null  && path.startsWith("@")) {
      path = (String) constructor.findAttribute(path);
    }
    
    // append path to a defined root
    String root = (String) constructor.findAttribute("xp_down_path");
    path = (root == null ? "" : root) + (path == null ? "" : path);
    
    // check whether there are null values
    if(file == null) {
      int p = path.lastIndexOf('/');
      if(p > -1) {
        file = path.substring(p + 1);
        path = path.substring(0, p);
      } else {
        file = path;
        path = "";
      }
    }
    
    // already tried everything!
    if(file == null) {
      return;
    }
    
    // translate #root and #user macros
    if(path != null) {
      path = path.replaceAll("\\@root", ElephantContext.getRealPath("/"));
      if(constructor.getUser() != null) {
        path = path.replaceAll("\\@user", constructor.getUser().getId());
      }
    }
    
    if(file != null) {
      if(file.startsWith("/") || file.startsWith("\\")) {
        file = file.substring(1);
      }
    }
    
    new File(ElephantContext.getRealPath("/WEB-INF/logs")).mkdirs();
    File record = new File(ElephantContext.getRealPath("/WEB-INF/logs/downloads.txt"));
    BufferedWriter bw = new BufferedWriter(new FileWriter(record, record.exists()));
    bw.write(
            (constructor.getUser() != null ? constructor.getUser().getId() : "**") + " : " +
            ObjectString.formatNativeObject(new java.util.Date(), true) +
            " - " + path + "/" + file +
            "\n"
            );
    bw.close();
    response.setContentType(new MimetypesFileTypeMap().getContentType(path + "/" + file));
    response.setContentLength((int) new File(path + "/" + file).length());
    String onlyFile = file;
    int p = file.lastIndexOf("/");
    if(p > -1) {
        onlyFile = onlyFile.substring(p + 1);
    }
    response.setHeader("Content-Disposition", "attachment;filename=\"" + onlyFile.replaceAll(",", "_") + "\"");
    OutputStream out = response.getOutputStream();
    FileInputStream fis = new FileInputStream(path + "/" + file);
    
    byte buffer[] = new byte[10240];
    int count;
    while((count = fis.read(buffer)) > -1) {
      out.write(buffer, 0, count);
    }
    out.flush();
    out.close();
    fis.close();
    bw = new BufferedWriter(new FileWriter(record, record.exists()));
    bw.write("   >>>>>>>>>>>>>> Complete\n");
    bw.close();
  }

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The documentation for this class was generated from the following file:

• DownloadServlet.java