private DbxClient requireDbxClient(
HttpServletRequest request, HttpServletResponse response, User user)
throws IOException, ServletException {
if (user.dropboxAccessToken == null) {
common.pageSoftError(
response,
"This page requires a user whose has linked to their Dropbox account. Current user hasn't linked us to their Dropbox account.");
return null;
}
return new DbxClient(
common.getRequestConfig(request), user.dropboxAccessToken, common.dbxAppInfo.host);
}
public void doBrowse(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
if (!common.checkGet(request, response)) return;
User user = common.getLoggedInUser(request);
if (user == null) {
common.pageSoftError(response, "Can't do /browse. Nobody is logged in.");
return;
}
DbxClient dbxClient = requireDbxClient(request, response, user);
if (dbxClient == null) return;
// Make sure the path starts with '/'. There are probably other checks we can perform...
String path = request.getParameter("path");
if (path == null) {
path = "/";
} else {
String pathError = DbxPath.findError(path);
if (pathError != null) {
response.sendError(400, "Invalid path: " + jq(path) + ": " + pathError);
return;
}
}
// Get the folder listing from Dropbox.
DbxEntry.WithChildren listing;
try {
listing = dbxClient.getMetadataWithChildren(path);
} catch (DbxException ex) {
common.handleDbxException(response, user, ex, "getMetadataWithChildren(" + jq(path) + ")");
return;
}
if (listing == null) {
response.sendError(400, "Path doesn't exist on Dropbox: " + jq(path));
}
FormProtection fp = FormProtection.start(response);
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), UTF8));
out.println("<html>");
out.println("<head><title>" + escapeHtml4(path) + "- Web File Browser</title></head>");
out.println("<body>");
fp.insertAntiRedressHtml(out);
out.println("<h2>Path: " + escapeHtml4(path) + "</h2>");
if (listing == null) {
out.println("<p>Nothing here...</p>");
}
// Folder
else if (listing.entry instanceof DbxEntry.Folder) {
// Upload form
out.println("<form action='/upload' method='post' enctype='multipart/form-data'>");
fp.insertAntiCsrfFormField(out);
out.println("<label for='file'>Upload file:</label> <input name='file' type='file'/>");
out.println("<input type='submit' value='Upload'/>");
out.println(
"<input name='targetFolder' type='hidden' value='"
+ escapeHtml4(listing.entry.path)
+ "'/>");
out.println("</form>");
// Listing of folder contents.
out.println("<ul>");
for (DbxEntry child : listing.children) {
out.println(
" <li><a href='/browse?path="
+ escapeHtml4(child.path)
+ "'>"
+ escapeHtml4(child.name)
+ "</a></li>");
}
out.println("</ul>");
}
// File
else {
DbxEntry.File f = (DbxEntry.File) listing.entry;
out.println("<pre>");
out.print(escapeHtml4(f.toStringMultiline()));
out.println("</pre>");
}
out.println("</body>");
out.println("</html>");
out.flush();
}
public void doUpload(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
if (!common.checkPost(request, response)) return;
User user = common.requireLoggedInUser(request, response);
if (user == null) return;
DbxClient dbxClient = requireDbxClient(request, response, user);
if (dbxClient == null) return;
try {
request.getParts(); // Just call getParts() to trigger the too-large exception.
} catch (IllegalStateException ex) {
response.sendError(400, "Request too large");
return;
}
String targetFolder = slurpUtf8Part(request, response, "targetFolder", 1024);
if (targetFolder == null) return;
Part filePart = request.getPart("file");
if (filePart == null) {
response.sendError(400, "Field \"file\" is missing.");
return;
}
String fileName = filePart.getName();
if (fileName == null) {
response.sendError(400, "Field \"file\" has no name.");
return;
}
// Upload file to Dropbox
String fullTargetPath = targetFolder + "/" + fileName;
DbxEntry.File metadata;
try {
metadata =
dbxClient.uploadFile(
fullTargetPath, DbxWriteMode.add(), filePart.getSize(), filePart.getInputStream());
} catch (DbxException ex) {
common.handleDbxException(response, user, ex, "uploadFile(" + jq(fullTargetPath) + ", ...)");
return;
} catch (IOException ex) {
response.sendError(400, "Error getting file data from you.");
return;
}
// Display uploaded file metadata.
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), "UTF-8"));
out.println("<html>");
out.println("<head><title>File uploaded: " + escapeHtml4(metadata.path) + "</title></head>");
out.println("<body>");
out.println("<h2>File uploaded: " + escapeHtml4(metadata.path) + "</h2>");
out.println("<pre>");
out.print(escapeHtml4(metadata.toStringMultiline()));
out.println("</pre>");
out.println("</body>");
out.println("</html>");
out.flush();
}