I have doc or docx document saved in Unix directory and integrate with web page which allow user to download the attachment. I have following code to stream the character and saves as Word document with correct MIME type but why when open it shows garbage character. It is relate to character encoding problem. How to solve this? Should I use docx4j?
String fullfilename = filename;
File f = new File(fullfilename);
int length = 0;
ServletOutputStream op = response.getOutputStream();
ServletContext context = getContext();
String mimetype = context.getMimeType(fullfilename);
response.setContentType((mimetype != null) ? mimetype
: "application/x-download");
response.setContentLength((int) f.length());
response.setHeader("Content-Disposition", "attachment;filename="
+ filename);
byte[] bbuf = new byte[fullfilename.length()];
DataInputStream in = new DataInputStream(new FileInputStream(f));
while ((in != null) && ((length = in.read(bbuf)) != -1)) {
op.write(bbuf, 0, length);
}
in.close();
op.flush();
op.close();
Please help. Thanks.
Thread closed after setting the correct mime type.
Related
Suppose I have sample Upload file method like this in POStFile.aspx.
This method POST file (upload file) to http WEBDAV url.
public static void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) {
log.Debug(string.Format("Uploading {0} to {1}", file, url));
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
wr.ContentType = "multipart/form-data; boundary=" + boundary;
wr.Method = "POST";
wr.KeepAlive = true;
wr.Credentials = System.Net.CredentialCache.DefaultCredentials;
Stream rs = wr.GetRequestStream();
string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
foreach (string key in nvc.Keys)
{
rs.Write(boundarybytes, 0, boundarybytes.Length);
string formitem = string.Format(formdataTemplate, key, nvc[key]);
byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
rs.Write(formitembytes, 0, formitembytes.Length);
}
rs.Write(boundarybytes, 0, boundarybytes.Length);
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
string header = string.Format(headerTemplate, paramName, file, contentType);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
rs.Write(headerbytes, 0, headerbytes.Length);
FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[4096];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) {
rs.Write(buffer, 0, bytesRead);
}
fileStream.Close();
byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
rs.Write(trailer, 0, trailer.Length);
rs.Close();
WebResponse wresp = null;
try {
wresp = wr.GetResponse();
Stream stream2 = wresp.GetResponseStream();
StreamReader reader2 = new StreamReader(stream2);
log.Debug(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));
} catch(Exception ex) {
log.Error("Error uploading file", ex);
if(wresp != null) {
wresp.Close();
wresp = null;
}
} finally {
wr = null;
}
}
From here
NameValueCollection nvc = new NameValueCollection();
nvc.Add("id", "TTR");
nvc.Add("btn-submit-photo", "Upload");
HttpUploadFile("http://your.server.com/upload",
#"C:\test\test.jpg", "file", "image/jpeg", nvc);
Question 1 : Shouldn't the url should be like "http://your.server.com/upload.aspx" instead of "http://your.server.com/upload"
If I give url like "http://your.server.com/upload" then i get 405 error method not found.
So it should point to any page.
Question 2 : How should I receive the post and save the file in upload.aspx.
Can the file directly uploaded to remote server without any receiving
page ?
This question was about "File transfer to WEBDAV http URL using or POST or PUT method"
Above is sample POST method.Similarly there can by PUT method which is little different from POST method.
Question 1 : Shouldn't the url should be like "http://your.server.com/upload.aspx" instead of "http://your.server.com/upload"
For novice man like me, main confusion is URL.It entirely depend upon "How WEBDAV server want to receive POST or PUT method ?"
I think for POST method ,there should be one receiving page which accept file and other parameters from POSTfile page and save the file to disk.
I don't know about .net code but WEB API has inbuilt feature which can parse data like "multipart/form-data; boundary=---------------------------8d60ff73d4553cc"
Below code is just sample code,
[HttpPost]
public async Task<FileUploadDetails> Post()
{
// file path
var fileuploadPath = HttpContext.Current.Server.MapPath("~/UploadedFiles");
////
var multiFormDataStreamProvider = new MultiFileUploadProvider(fileuploadPath);
// Read the MIME multipart asynchronously
await Request.Content.ReadAsMultipartAsync(multiFormDataStreamProvider);
string uploadingFileName = multiFormDataStreamProvider
.FileData.Select(x => x.LocalFileName).FirstOrDefault();
// Files
//
foreach (MultipartFileData file in multiFormDataStreamProvider.FileData)
{
Debug.WriteLine(file.Headers.ContentDisposition.FileName);
Debug.WriteLine("File path: " + file.LocalFileName);
}
// Form data
//
foreach (var key in multiFormDataStreamProvider.FormData.AllKeys)
{
foreach (var val in multiFormDataStreamProvider.FormData.GetValues(key))
{
Debug.WriteLine(string.Format("{0}: {1}", key, val));
}
}
//Create response
return new FileUploadDetails
{
FilePath = uploadingFileName,
FileName = Path.GetFileName(uploadingFileName),
FileLength = new FileInfo(uploadingFileName).Length,
FileCreatedTime = DateTime.Now.ToLongDateString()
};
return null;
}
So url in POSTFile.aspx page should point to API method in this case,
"http://your.server.com/api/fileUpload"
where fileUpload is api controller name.
If you are using HTTP PUT method then
i) you want to receive it in pro grammatically handle it.Write PUT method similar to POST method in api class.
ii) you want to directly save the file to folder using PUT method.
so URL in this case can be,
"http://your.server.com/Imagefolder"
Yes this can be done with extra IIS setting.
Create virtual directory in Target folder,beside few other thing.
Am running the project on the visual studio 2015, When I tried to read the PDF its giving me the following error;
Access to the path 'E:\FILE\FILEUPLOAD\InnerFile\File' is denied.
Function Defination
var cd = new System.Net.Mime.ContentDisposition { FileName = "PDF.pdf", Inline = true };
string contentType = MimeMapping.GetMimeMapping("PDF.pdf");
Response.AppendHeader("Content-Disposition", cd.ToString());
var innerPath = "InnerFile/File" ;
FileInfo fi = new FileInfo(PDFUploadRootPath + innerPath + "/PDF.pdf");
byte[] bytes = System.IO.File.ReadAllBytes(PDFUploadRootPath + innerPath);
return File(bytes, contentType);
NOTE:
Given Full permission to user
Physically File Exists
I dont understand what to do now please help!
Your FileInfo instance indeed references 'E:\FILE\FILEUPLOAD\InnerFile\File\PDF.pdf':
FileInfo fi = new FileInfo(PDFUploadRootPath + innerPath + "/PDF.pdf");
but when trying to read the file contents you forgot the file name and only use the path 'E:\FILE\FILEUPLOAD\InnerFile\File':
byte[] bytes = System.IO.File.ReadAllBytes(PDFUploadRootPath + innerPath);
Thus, also add the file name for reading all file bytes:
byte[] bytes = System.IO.File.ReadAllBytes(PDFUploadRootPath + innerPath + "/PDF.pdf");
Furthermore, as others have mentioned in comments, you should really use Path.Combine to glue path parts together, not simple string concatenation...
Try using FileStream instead of byte array for reading the pdf file.
FileStream templateFileStream = File.OpenRead(filePath);
return templateFileStream;
Also check (through code) if user has write permission to directory or path:
public static bool HasUserWritePermission(String path, String NtAccountName)
{
DirectoryInfo di = new DirectoryInfo(path);
DirectorySecurity acl = di.GetAccessControl(AccessControlSections.All);
AuthorizationRuleCollection rules = acl.GetAccessRules(true, true, typeof(NTAccount));
Boolean hasPermission = false;
//Go through the rules returned from the DirectorySecurity
foreach (AuthorizationRule rule in rules)
{
//If we find one that matches the identity we are looking for
if (rule.IdentityReference.Value.Equals(NtAccountName, StringComparison.CurrentCultureIgnoreCase))
{
//Cast to a FileSystemAccessRule to check for access rights
if ((((FileSystemAccessRule)rule).FileSystemRights & FileSystemRights.WriteData) > 0)
{
hasPermission = true;
}
else
{
hasPermission = false;
}
}
}
return hasPermission;
}
I had tried to develop a servlet that allow user to download file but it allow user to download the file but the file content contains binary garbage and not human readable. May I know what could be the reason ?
Code
int length = -1, index = 0;
byte[] buffer = null;
String attachmentPath = null, contentType = null, extension = null;
File attachmentFile = null;
BufferedInputStream input = null;
ServletOutputStream output = null;
ServletContext context = null;
attachmentPath = request.getParameter("attachmentPath");
if (attachmentPath != null && !attachmentPath.isEmpty()) {
attachmentFile = new File(attachmentPath);
if (attachmentFile.exists()) {
response.reset();
context = super.getContext();
contentType = context.getMimeType(attachmentFile.getName());
response.setContentType(contentType);
response.addHeader("content-length", String.valueOf(attachmentFile.length()));
response.addHeader("content-disposition", "attachment;filename=" + attachmentFile.getName());
try {
buffer = new byte[AttachmentTask.DEFAULT_BUFFER_SIZE];
input = new BufferedInputStream(new FileInputStream(attachmentFile));
output = response.getOutputStream();
while ((length = input.read(buffer)) != -1) {
output.write(buffer, 0, length);
index += length;
// output.write(length);
}
output.flush();
input.close();
output.close();
} catch (FileNotFoundException exp) {
logger.error(exp.getMessage());
} catch (IOException exp) {
logger.error(exp.getMessage());
}
} else {
try {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
} catch (IOException exp) {
logger.error(exp.getMessage());
}
}
It is relate to writing file as binary or text mode or browser settings?
Please help.
Thanks.
The problem is not in the code given so far. You're properly using InputStream/OutputStream instead of a Reader/Writer to stream the file.
The cause of the problem is more likely in the way how you created/saved the file. This problem will manifest when you've used a Reader and/or Writer which is not been instructed to use the proper character encoding for the characters being read/written. Perhaps you're creating an upload/download service and the fault was in the upload process itself?
Assuming that the data is in UTF-8, you should have created the reader as follows:
Reader reader = new InputStreamReader(new FileInputStream(file), "UTF-8"));
and the writer as follows:
Writer writer = new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
But if you actually don't need to manipulate the stream on a per-character basis, but just wanted to transfer the data unmodified, then you should actually have used InputStream/OutputStream all the time.
See also:
Unicode - How to get the characters right?
I am using the below code to Upload an Image file to a SharePoint Document Library. The code works fine locally but once deployed to server, i get the Exception as file not found.
String fileToUpload = FlUpldImage.PostedFile.FileName; //#"C:\Users\admin.RSS\Desktop\Photos\me_skype.jpg";
String documentLibraryName = "SiteAssets";
if (!System.IO.File.Exists(fileToUpload))
throw new FileNotFoundException("File not found.", fileToUpload);
SPFolder myLibrary = web.Folders[documentLibraryName];
// Prepare to upload
Boolean replaceExistingFiles = true;
String fileName = CheckStringNull(txtFirstName.Text) + CheckStringNull(txtLastName.Text) + CheckDateNull(txtDOB) + System.IO.Path.GetFileName(fileToUpload); ;
if (fileName.Contains('/'))
{
fileName = fileName.Replace("/", "");
}
if (fileName.Contains(':'))
{
fileName = fileName.Replace(":", "");
}
FileStream fileStream = File.OpenRead(fileToUpload);
//Upload document
SPFile spfile = myLibrary.Files.Add(fileName, fileStream, replaceExistingFiles);
string url = site.ToString() + "/" + spfile.ToString();
if (url.Contains("="))
{
url = url.Split('=')[1];
}
//Commit
myLibrary.Update();
The string fileupload contains URL as C:\Users\admin.RSS\Desktop\Photos\me.jpg This URL is actually the client system and the server side code throws exception as file not found. How to handle this issue?
UPDATE:
I removed the lines of code that checks if the file exists and now i get the exeption on FileStream fileStream = File.OpenRead(fileToUpload); as c:\windows\system32\inetsrv\20120605_133145.jpg cold not be found
Kindly help. Thank You
if (this.fuAvatarUpload.HasFile && this.fuAvatarUpload.PostedFile.FileName.Length > 0)
{
string extension = Path.GetExtension(file.FileName).ToLower();
string mimetype;
switch (extension)
{
case ".png":
case ".jpg":
case ".gif":
mimetype = file.ContentType;
break;
default:
_model.ShowMessage("We only accept .png, .jpg, and .gif!");
return;
}
if (file.ContentLength / 1000 < 1000)
{
Image image = Image.FromStream(file.InputStream);
Bitmap resized = new Bitmap(image, 150, 150);
byte[] byteArr = new byte[file.InputStream.Length];
using (MemoryStream stream = new MemoryStream())
{
resized.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
byteArr = stream.ToArray();
}
file.InputStream.Read(byteArr, 0, byteArr.Length);
profile.ImageUrl = byteArr;
profile.UseGravatar = false;
profileService.UpdateProfile(profile);
this._model.ShowApprovePanel();
}
else
{
_model.ShowMessage("The file you uploaded is larger than the 1mb limit. Please reduce the size of your file and try again.");
}
}
Saving the file physically onto server and than working on the same helped me resolve my issue.
I like to upload an file in my project. when I click the upload button the file should be stored in client system and the file name and path should be stored in the database. When I clicking the download button it should be downloaded based on the file name and path that I have stored in the database. After making the changes it should be uploaded as different file name and it will not affect the previous file content. If there is any code for this process please send it to me.
Thanks in advance
To upload a file you use the input type file and then process this accordingly on the server. Here is a complete tutorial on CodePlex that goes through exactly what you are looking for.
Warning don't use their code in production. Just noticed a couple of security risks, but anyways, use this to understand the process then figure out how to avoid sql-injections and possible overflows.
Here is another great article over at MSDN that covers File Uploading in ASP.NET 2.0.
string FolderPath = "yourpath";
string FileName = "Namefile";
string FilePath = Server.MapPath("~/" + FileName);
string Extension = Path.GetExtension(FileName);
Response.ContentType = "Application/x-msexcel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + FileName + "");
// Write the file to the Response
const int bufferLength = 10000;
byte[] buffer = new Byte[bufferLength];
int length = 0;
Stream download = null;
try {
download = new FileStream(Server.MapPath("~/" + FileName),
FileMode.Open,
FileAccess.Read);
do {
if (Response.IsClientConnected) {
length = download.Read(buffer, 0, bufferLength);
Response.OutputStream.Write(buffer, 0, length);
buffer = new Byte[bufferLength];
}
else {
length = -1;
}
}
while (length > 0);
Response.Flush();
Response.End();
}
finally {
if (download != null)
download.Close();
}