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HW9 #4

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11 changes: 0 additions & 11 deletions README.md
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22 changes: 21 additions & 1 deletion src/com/geekhub/hw8/CreateFileServlet.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,32 @@
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;

@WebServlet("/file/create")
public class CreateFileServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doGet(req, resp);
Path path = Paths.get(req.getParameter("name"), req.getParameter("fileName"));
req.setAttribute("name", path.getParent().toString());
if(creteFile(path)){
req.getRequestDispatcher("/dir/view").forward(req, resp);
}else{
resp.sendError(HttpServletResponse.SC_FORBIDDEN);
}
}

private boolean creteFile(Path name){
try {
Files.createFile(name);
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}

}
20 changes: 19 additions & 1 deletion src/com/geekhub/hw8/RemoveFileServlet.java
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Expand Up @@ -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;

@WebServlet("/file/remove")
public class RemoveFileServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doGet(req, resp);
Path path = Paths.get(req.getParameter("name"));
req.setAttribute("name", path.getParent().toString());
if(deleteFile(path))
req.getRequestDispatcher("/dir/view").forward(req, resp);
else
resp.sendError(HttpServletResponse.SC_FORBIDDEN);
}

private boolean deleteFile(Path path){
try {
return Files.deleteIfExists(path);
} catch (IOException e) {
e.printStackTrace();
}
return false;
}

}
65 changes: 59 additions & 6 deletions src/com/geekhub/hw8/ViewDirectoryServlet.java
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Expand Up @@ -9,12 +9,14 @@
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.util.ArrayList;
import java.util.Base64;
import java.util.Iterator;
import java.util.List;

@WebServlet(value = "/dir/view", initParams = {
@WebInitParam(name = "root", value = "D:\\")
@WebInitParam(name = "root", value = "E:\\")
})
public class ViewDirectoryServlet extends HttpServlet {

Expand All @@ -28,15 +30,66 @@ public void init(ServletConfig config) throws ServletException {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
StringBuilder sb = new StringBuilder();
String reqParam = req.getParameter("name")!= null ? req.getParameter("name"): ROOT_PATH.toAbsolutePath().toString();
if (!reqParam.equals(ROOT_PATH.toAbsolutePath().toString())) {
ROOT_PATH = Paths.get(req.getParameter("name"));
}else
ROOT_PATH = Paths.get("E:\\");
if(reqParam != null){
if(Files.exists(Paths.get(reqParam)))
if(!Files.isDirectory(Paths.get(reqParam))){
req.getRequestDispatcher("/file/view").forward(req,resp);
}
}
sb.append("<html>");

sb.append("<head>");
sb.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1251\" />");
sb.append("</head>");
sb.append("<body>");
getParentFolder(sb);
for(Path path : getPaths()){
appendLink(sb, path.getFileName().toString(), path);
}
//TODO: Implement directory listing here

sb.append("</body>");
sb.append("<h2>Create file on this directory:</h2>");
sb.append("<form action=\"/file/create\" method=\"get\">\n" +
" <label>File name</label>\n" +
"<input type=\"hidden\" name=\"name\" value=" + reqParam + ">"+
" <input type=\"text\" name=\"fileName\">\n" +
" <button type=\"submit\">Create file</button>\n" +
"</form>");
sb.append("</html>");

resp.getWriter().write(sb.toString());
}

private void appendLink(StringBuilder sb, String text, Path path) {
//TODO: Implement link rendering based on path type (directory or file)
if(Files.isDirectory(path))
sb.append("<b><a href = "+ "?name=" + path.toAbsolutePath().toString() + ""+">" +"--" + text + "</a></b>" + "</br>");
else
sb.append("<a href = "+ "?name=" + path.toAbsolutePath().toString() + ""+">" +"--" + text + "</a> " +
" <a href=" + "/file/remove?name=" + path.toAbsolutePath().toString() + "" + " >" + "Delete file" + "</a></br>");

}

private void getParentFolder(StringBuilder sb){
if(ROOT_PATH.getParent() != null)
sb.append("<b><a href = "+ "?name=" + ROOT_PATH.getParent().toAbsolutePath().toString() + ""+">" + ROOT_PATH.getParent().toString() + "</a></b>" + "<br>");
}

private List<Path> getPaths() throws IOException {
List<Path> result = new ArrayList<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStream(ROOT_PATH)) {
for (Path entry: stream) {
result.add(entry);
}
} catch (DirectoryIteratorException ex) {
throw ex.getCause();
}

return result;
}

}
28 changes: 27 additions & 1 deletion src/com/geekhub/hw8/ViewFileServlet.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,14 +5,40 @@
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.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
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);
StringBuilder sb = new StringBuilder();
sb.append("<html>");
sb.append("<p>");
sb.append(getFileData(req.getParameter("name")));
sb.append("</p>");
sb.append("</html>");
resp.getWriter().write(sb.toString());
}

private String getFileData(String path){
StringBuilder content = new StringBuilder();
try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(path), "Cp1252"))) {
while(reader.ready()){
content.append(reader.readLine() + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}
return content.toString();
}

}