GeekHubJava4WebThursday · EvgenijOkunev · Jan 10, 2016
diff --git a/src/com/geekhub/hw8/CreateFileServlet.java b/src/com/geekhub/hw8/CreateFileServlet.java
@@ -6,12 +6,36 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.text.DateFormat;
+import java.util.Date;
 
 @WebServlet("/file/create")
 public class CreateFileServlet extends HttpServlet {
 
     @Override
-    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        super.doGet(req, resp);
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setCharacterEncoding("UTF-8");
+        String directory = (String) req.getSession().getAttribute("path");
+        String fileName = req.getParameter("fileName");
+        String result;
+        Path path;
+
+        try {
+            path = Paths.get(directory, fileName);
+            Files.createFile(path);
+            result = "file " + path.getFileName() + " has been created";
+        } catch (InvalidPathException e) {
+            result = "invalid path";
+        } catch (IOException e) {
+            result = "error while creating file: " + e;
+        }
+
+        req.getSession().setAttribute("message", "[" + DateFormat.getDateTimeInstance().format(new Date()) + "] " + result);
+        resp.sendRedirect("/dir/view");
     }
-}
+
+}
diff --git a/src/com/geekhub/hw8/IndexServlet.java b/src/com/geekhub/hw8/IndexServlet.java
@@ -7,7 +7,7 @@
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 
-@WebServlet("/")
+@WebServlet("/index")
 public class IndexServlet extends HttpServlet {
 
     @Override

diff --git a/src/com/geekhub/hw8/RemoveFileServlet.java b/src/com/geekhub/hw8/RemoveFileServlet.java
@@ -6,12 +6,30 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.text.DateFormat;
+import java.util.Date;
 
 @WebServlet("/file/remove")
 public class RemoveFileServlet extends HttpServlet {
 
     @Override
-    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        super.doGet(req, resp);
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setCharacterEncoding("UTF-8");
+        Path path = Paths.get(req.getParameter("path"));
+        String result;
+
+        try {
+            Files.delete(path);
+            result = "file " + path.getFileName() + " has been deleted";
+        } catch (IOException e) {
+            result = "this file can not be deleted";
+        }
+
+        req.getSession().setAttribute("message", "[" + DateFormat.getDateTimeInstance().format(new Date()) + "] " + result);
+        resp.sendRedirect("/dir/view");
     }
+
 }
diff --git a/src/com/geekhub/hw8/ViewDirectoryServlet.java b/src/com/geekhub/hw8/ViewDirectoryServlet.java
@@ -8,35 +8,69 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
+import java.nio.file.*;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.*;
 
 @WebServlet(value = "/dir/view", initParams = {
-    @WebInitParam(name = "root", value = "D:\\")
+        @WebInitParam(name = "root", value = "D:\\")
 })
 public class ViewDirectoryServlet extends HttpServlet {
 
     private static Path ROOT_PATH;
+    private static List<String> messages = new ArrayList<>();
 
     @Override
     public void init(ServletConfig config) throws ServletException {
         ROOT_PATH = Paths.get(config.getInitParameter("root"));
+        messages.add("[" + DateFormat.getDateTimeInstance().format(new Date()) + "] " + " launched. Enjoy ) ");
     }
 
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        StringBuilder sb = new StringBuilder();
-        sb.append("<html>");
+        Map<String, String> directoryLinks = new HashMap<>();
+        Map<String, String> fileLinks = new HashMap<>();
 
-        //TODO: Implement directory listing here
+        String pathParam = (String) req.getSession().getAttribute("path");
+        Path currentPath = (pathParam == null) ? ROOT_PATH : Paths.get(pathParam);
+        try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(currentPath)) {
+            for (Path path : directoryStream) {
+                String linkView = path.getName(path.getNameCount() - 1).toString();
+                Path linkPath = path.toAbsolutePath();
+                if (Files.isDirectory(linkPath, LinkOption.NOFOLLOW_LINKS)) {
+                    directoryLinks.put(linkView, linkPath.toString());
+                } else {
+                    fileLinks.put(linkView, linkPath.toString());
+                }
+            }
+        } catch (IOException e) {
+            req.getSession().setAttribute("path", currentPath.getParent().toString());
+            resp.sendRedirect("/dir/view");
+            return;
+        }
 
-        sb.append("</html>");
-        resp.getWriter().write(sb.toString());
+        req.getSession().setAttribute("path", currentPath.toString());
+        req.setAttribute("backPath", (!currentPath.equals(ROOT_PATH)) ? currentPath.getParent().toString() : ROOT_PATH.toString());
+        req.setAttribute("rootPath", ROOT_PATH.toString());
+        req.setAttribute("directoryLinks", directoryLinks);
+        req.setAttribute("fileLinks", fileLinks);
+
+        Object message = req.getSession().getAttribute("message");
+        if (message != null) {
+            messages.add((String) message);
+        }
+        req.getSession().setAttribute("message", null);
+        req.getSession().setAttribute("messages", messages);
+
+        req.getRequestDispatcher("/WEB-INF/jsp/viewDirectory.jsp").forward(req, resp);
     }
 
-    private void appendLink(StringBuilder sb, String text, Path path) {
-        //TODO: Implement link rendering based on path type (directory or file)
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setCharacterEncoding("UTF-8");
+        req.getSession().setAttribute("path", req.getParameter("path"));
+        resp.sendRedirect("/dir/view");
     }
+
 }
diff --git a/src/com/geekhub/hw8/ViewFileServlet.java b/src/com/geekhub/hw8/ViewFileServlet.java
@@ -5,14 +5,47 @@
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.BufferedReader;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.text.DateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
 
 @WebServlet("/file/view")
 public class ViewFileServlet extends HttpServlet {
 
     @Override
-    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        super.doGet(req, resp);
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setCharacterEncoding("UTF-8");
+        Path path = Paths.get(req.getParameter("path"));
+
+        List<String> fileLines = new ArrayList<>();
+        String exception = "";
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(path.toString()), "windows-1251"))) {
+            String currentLine;
+            while ((currentLine = reader.readLine()) != null) {
+                fileLines.add(currentLine);
+            }
+        } catch (IOException e) {
+            exception = e.getMessage();
+        }
+
+        if (exception.equals("")) {
+            req.setAttribute("backPath", path.getParent().toString());
+            req.setAttribute("fileName", path.getFileName());
+            req.setAttribute("fileLines", fileLines);
+            req.getSession().setAttribute("message", "[" + DateFormat.getDateTimeInstance().format(new Date()) + "] file " + path.getFileName() + " has been opened");
+            req.getRequestDispatcher("/WEB-INF/jsp/viewFile.jsp").forward(req, resp);
+        } else {
+            req.getSession().setAttribute("message", "[" + DateFormat.getDateTimeInstance().format(new Date()) + "] " + exception);
+            resp.sendRedirect("/dir/view");
+        }
     }
+
 }
diff --git a/web/WEB-INF/jsp/ViewDirectory.jsp b/web/WEB-INF/jsp/ViewDirectory.jsp
@@ -0,0 +1,75 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
+
+<html>
+
+<head>
+    <title>File manager</title>
+    <link type="text/css" rel="stylesheet" href="/css/style.css"/>
+</head>
+
+<body>
+
+<form method="post" action="/file/create">
+    <input type="text" name="fileName" placeholder="file name">
+    <input type="submit" value="Create new file">
+</form>
+
+<table>
+
+    <c:if test="${sessionScope.path != requestScope.rootPath}">
+        <tr>
+            <td>
+                <div class="row">
+                    <form name="main" method="post" action="/dir/view">
+                        <input type="submit" name="text" value="[..]" class="dir">
+                        <input type="hidden" name="path" value="${requestScope.backPath}">
+                    </form>
+                </div>
+            </td>
+        </tr>
+    </c:if>
+
+    <c:forEach items="${directoryLinks}" var="directoryLink">
+        <tr>
+            <td>
+                <div class="row">
+                    <form name="main" method="post" action="/dir/view">
+                        <input type="submit" name="text" value="[${directoryLink.key}]" class="dir">
+                        <input type="hidden" name="path" value="${directoryLink.value}">
+                    </form>
+                </div>
+            </td>
+        </tr>
+    </c:forEach>
+
+    <c:forEach items="${fileLinks}" var="fileLink">
+        <tr>
+            <td>
+                <div class="row">
+                    <form name="main" method="post" action="/file/view">
+                        <input type="submit" name="text" value="${fileLink.key}">
+                        <input type="hidden" name="path" value="${fileLink.value}">
+                    </form>
+                </div>
+            </td>
+            <td>
+                <div class="row">
+                    <form name="del" method="post" action="/file/remove">
+                        <input type="submit" value="delete" class="del">
+                        <input type="hidden" name="path" value="${fileLink.value}">
+                    </form>
+                </div>
+            </td>
+        </tr>
+    </c:forEach>
+
+</table>
+
+<br><br>
+<jsp:include page="footer.jsp"/>
+
+</body>
+
+</html>
diff --git a/web/WEB-INF/jsp/footer.jsp b/web/WEB-INF/jsp/footer.jsp
@@ -0,0 +1,14 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+</head>
+<body>
+<div class="operationLog">
+    <c:forEach items="${messages}" var="message">
+        ${message}
+        <br>
+    </c:forEach>
+</div>
+</body>
+</html>
diff --git a/web/WEB-INF/jsp/viewFile.jsp b/web/WEB-INF/jsp/viewFile.jsp
@@ -0,0 +1,27 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%@ page contentType="text/html;charset=utf-8" language="java" %>
+<html>
+<head>
+    <meta charset="windows-1251">
+    <title>File content</title>
+    <link type="text/css" rel="stylesheet" href="/css/style.css"/>
+</head>
+<body>
+<div>
+    <form name="back" method="post" action="/dir/view">
+        <input type="submit" name="back" value="Return">
+        <input type="hidden" name="path" value="${requestScope.backPath}">
+    </form>
+</div>
+<h4> File name: ${fileName}</h4>
+
+<h4> File content:</h4>
+
+<div class="fileContent">
+    <c:forEach items="${fileLines}" var="fileLine">
+        ${fileLine}
+        <br>
+    </c:forEach>
+</div>
+</body>
+</html>
diff --git a/web/css/style.css b/web/css/style.css
@@ -0,0 +1,43 @@
+table, tr, td {
+    width: auto;
+    margin: 0;
+    padding: 0;
+    border-collapse: collapse;
+    border: solid 2px black;
+}
+
+input[type=submit] {
+    cursor: pointer;
+    background: none;
+    padding: 0;
+    border: none;
+    color: black;
+    font: 100% Arial;
+}
+
+input[type=submit]:hover {
+    color: red;
+}
+
+input[type=submit].dir {
+    font-weight: bolder;
+    color: orange;
+}
+
+.row {
+    background-color: white;
+    padding: 5px 5px 10px;
+    height: 15px;
+}
+
+div.fileContent {
+    padding: 10px;
+    border: solid 1px black;
+    width: 50%;
+}
+
+div.operationLog {
+    padding: 10px;
+    border: solid 1px black;
+    width: 50%;
+}