Write binary data

hello,
in the attachement there is a picture where i save data in a binary file.i hope so.
the problem is that i only can read the binary file when the path is created with the 'File Dialog'.
why is it so??
markus
Attachments:
Binary.jpg ‏83 KB

Hi
You are using low level read and write functions and data types.
Please, take a look at datalogging examples, to understand how to write and read log files.
Hope it helps.
Alipio
"Qod natura non dat, Salmantica non praestat"

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Example using setcontenttype to write binary data?

Hi there,
I'm having trouble getting my jsp to read a binary file and send the response to an http client.
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First, I would not recommend using JSP, but use servlets instead. If you have any newlines in the page like after <%@ page directives, you are can't write binary data. So you have to make all your page directives and everything have no newlines, making it ugly to read.
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Hi,
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Write binary data to DB

I am trying to write a binary file to an SQL database (with two columns: ID and data). Using the subvi "Read from Binary File", the output is a String which I then try to write to a database. I can do this if two conditions are met:
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The amount of data is less than 8000 bytes.
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I'm guessing "CONVERT" is part of the SQL query language and is a standard error returned by either the database or ODBC driver? In other words, not something I have direct access to? Is there a way to convert the data into something (binary) that the database will not complain about?
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Attachments:
WriteFileToDB.vi ‏16 KB
WriteFileToDB.png ‏36 KB

Attached image file for reference.
Kudos are always welcome if you got solution to some extent.
I need my difficulties because they are necessary to enjoy my success.
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Hi,
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Use POST instead of GET to transfer binary data. For GET, you can only append the data in the QUERY_STRING and its length is very limited. so better use POST.

Binary Data and JSP

Hi all I have a basic doubt. How does Servlets is preferred technology to generate binary data than JSP? Any limitation in JSP?

Okay,
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DAQ vi to perform digital write and read measurements using 32 bits binary data saved in a file

Hi
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I’m aware I can’t use the simulated
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My Plan
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I’ve
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My
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Attachments:
DIO_write_read DAQ from file.vi ‏17 KB

What does your file look like? The DAQmx write is expecting a single U32 value, not an array of I64.
Message Edited by vt92 on 09-16-2009 02:42 PM
"There is a God shaped vacuum in the heart of every man which cannot be filled by any created thing, but only by God, the Creator, made known through Jesus." - Blaise Pascal

Binary Data write?

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How are you writing the binary data from flash? The
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Where is the binary data of this icon stored and retrieved from Application server?

Hello guys,
Today I observed one phenomenon and could not explain it per my knowledge.
I have one url which points to an icon in application server:
https://<host name>:44301/sap/public/bc/ur/nw5/themes/sap_corbu/common/libs/Icon/SuccessMessage.gif
I could successfully open it via chrome:
and after that I could see an entry in ICM server cache. Everything works perfectly.
Then I tried to check this icon in mime browser in SE80. To my surprise, the folder /sap/public/bc/ur/nw5/themes is empty.
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Hello guys,
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How can I read a binary file stream with many data type, as with AcqKnowledge physio binary data file?

I would like to read in and write physiological data files which were saved by BioPac�s AcqKnowledge 3.8.1 software, in conjunction with their MP150 acquisition system. To start with, I�d like to write a converter from different physiodata file format into the AcqKnowledge binary file format for version 3.5 � 3.7 (including 3.7.3). It will allow us to read different file format into an analysis package which can only read in file written by AcqKnowledge version 3.5 � 3.7 (including 3.7.3).
I attempted to write a reader following the Application Note AS156 entitled �AcqKnowledge File Format for PC with Windows� (see http://biopac.com/AppNotes/ app156Fi
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I guess the problem I had was that I could not manage to read all the different byte data stream with File.vi. This is easy in C but I did not get very far in LabView 7.0. Also, I was a little unsure which LabView data types correspond to int, char , short, long, double, byte, RGB and Rect. And, since it is for PC I am also assuming the data to be written as �little endian� integer, and thus I also used byte swap vi.
Two samples *.acq binary files are attach to this post to the list. Demo.acq is for version 3.7-3.7.2, while SCR_EKGtest1b.acq was recorded and saved with AcqKnowledge 3.8.1, which version number is 41.
I would be grateful if you someone could explain how to handle such binary file stream with LabView and send an example to i
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Many thanks in advance for your help.
Donat-Pierre
Attachments:
Demo.acq ‏248 KB
SCR_EKG_test1b.acq ‏97 KB

The reading of double is also straight forward : just use a dble float wired to the type cast node, after inverting the string (indian conversion).
See the attached example.
The measure of skin thickness is based on OCT (optical coherent tomography = interferometry) : an optical fiber system send and received light emitted to/back from the skin at a few centimeter distance. A profile of skin structure is then computed from the optical signal.
CC
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Read_AK_time_info.vi.zip ‏9 KB

How can I read a binary file stream with many data type, as with AcqKnowledge physio binary data file?

I would like to read in and write physiological data which was saved by Biopac�s AcqKnowledge 3.8.1 software, in conjunction with their MP150 acquisition system. To start with, I�d like to write a converter from different physiodata file format into the AcqKnowledge binary file format for version 3.5 � 3.7 (including 3.7.3). It will allow us to read different file format into an analysis package which can only read in file written by AcqKnowledge version 3.5 � 3.7 (including 3.7.3).
I attempted to write a reader following the Application Note AS156 entitled �AcqKnowledge File Format for PC with Windows� (see http://biopac.com/AppNotes/app156FileFormat/FileFormat.h
tm ). Note the link for the Mac File format is very instructive too - it is presented in a different style and might make sense to some people with C library like look (http://biopac.com/AppNotes/app155macffmt/macff.htm) .
I guess the problem I had was that I could not manage to read all the different byte data stream with File.vi. This is easy in C but I did not get very far in LabView 7.0. Also, because it is for PC I am assuming the data to be written as �little endian� integer, and thus I also used byte swap vi.
I would be grateful if you someone could explain how to handle such binary file stream with LabView and send an example to illustrate it.
Many thanks in advance for your help.
Donat-Pierre

One more step...
short are U16 integer
double are double precision float
bool seem to be 2 bytes (= U16)
char are string (variable length)
rgb are U16 integer, with high order byte = 0
rect should be 4 x U16 (top, left, bottom, right)
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

Download file problem for binary data?

Dear All,
I have wrote a jsp file to do download page. I have used a piece of code from the JDC to this. This code will prompt the download dialog box each time user clicks the download button. The code itself will set the content type for different application. The code is like below:
try
java.io.File fileobj = new java.io.File(strFolder + strFile);
response.setContentType(application.getMimeType(fileobj.getName()));
response.setHeader("Content-Disposition","attachment; filename=\""
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java.io.FileInputStream in = new java.io.FileInputStream(fileobj);
int ch;
while ((ch = in.read()) != -1) {
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out.flush();
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The code can download and handle text file correctly when it is openned in the text editor or inside the IE. But when a PDF file or Image is downloaded and openned in the PDF viewer or image viewer, it is corrupted and cannot be viewed. What is the problem? Any ideas?
So, I wonder this code can handle binary data or not. It is seen like there is no different code to handle text and binary data in Java/Jsp.
Thank you very much!
Best Regards,
Rockyu Lee


Add following lines to .tld file (custom tag definition)
<tag>
<name>downloadbinary</name>
<tagclass>org.rampally.DownloadBinaryTag</tagclass>
<bodycontent>JSP</bodycontent>
</tag>
Add following line to JSP files.
In JSP, keep one line of source. Make sure that there are no space and additional line feeds at the any where
in the JSP files except JSP tags.
<%@ taglib uri="/WEB-INF/taglibs/mb.tld" prefix="mytags" %>
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in your session or request object.
Tag class ....
public class DownloadBinaryTag extends TagSupport {
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          String fileName = request.getParameter( "filename" );
          java.io.File file = new java.io.File( fileName);
          java.io.DataInputStream dis;
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               dis = new java.io.DataInputStream(new FileInputStream(fileName));
          } catch (FileNotFoundException e) {
               // do error handling ...
               return EVAL_PAGE;
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               response.setContentType(contentType);
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               response.setHeader("Content-disposition", "inline; filename=" + newFileName );
               ServletOutputStream sout = response.getOutputStream();
               int len;
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               sout.flush();
               sout.close();
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               System.out.println(e.getMessage());
     static public void sendBinaryFile( byte[] data,
                              HttpServletResponse response,
                              String contentType ) {
          try {
               response.setContentType(contentType);
               String fileName="test.pdf";
               response.setHeader("Content-disposition", "inline; filename=" + newFileName );
               ServletOutputStream sout = response.getOutputStream();
               sout.write(data);
               sout.flush();
               sout.close();
          } catch (Exception e) {
               System.out.println(e.getMessage());
You may have to change 'inline' to 'attachment' if you do not want IE to inline the document.
That's all!!.. Hope this helps...!

Loading binary data to graph

Hello, I have a VI that uses an XY-Graph to graph 2 plots and after my buffer exceeds a certain limit it writes that data into a binary file and saves it on my computer. Now I'm trying to make a VI that can open that binary file and display it on an XY-Graph. But i'm having trouble, I keep getting an error... I'm using the LabVIEW Example VI "Read Binary File" to do this. My data is a cluster of 2 2D arrays, each array contains the X and Y values needed for the plot.
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Thanks!

Without the actual code to debug, I can only make a few guesses/observations.
1. No need to read the file size, just set the count of Read from Binary File to -1 and read the whole thing. Your calculation is incorrect, count is the number of 'elements' to read, not necessarily equal to the number of bytes. For example, if you set the datatype to I32, you will read 4*count bytes.
2. That datatype does not seem like the proper one for a multiple XY graph. You should have an array of clusters containing 2 1D arrays. Basically an array of what is called 'output cluster' in your screenshot. To be honest, I am a little flumoxed as to why XY Graph seems to like that datatype.
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Message Edited by Darin.K on 12-07-2009 01:26 PM

Exception writing binary data to the output stream to client -Broken pipe

Hi,
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     at weblogic.servlet.internal.ChunkOutput.write(ChunkOutput.java:333)
     at weblogic.servlet.internal.ChunkOutputWrapper.write(ChunkOutputWrapper.java:148)
     at weblogic.servlet.internal.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:148)
     at COM.FutureTense.Servlet.ServletRequest$OutputOutputStream.write(ServletRequest.java:80)
     at COM.FutureTense.Servlet.ServletRequest.write(ServletRequest.java:1633)
     at com.openmarket.Satellite.RequestContext.write(RequestContext.java:1123)
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Thanks
KarthiK

Thank u very much,
     FileOutputStream opGif = new FileOutputStream(destFile, false);
I have changed above line with the following line:
     PrintWriter opGif = new PrintWriter ( new FileWriter(destFile, false));
and now this code is working very fine.
Thanks once again...

Storing binary data to a file......

Hi Friends,
I am trying to make a webapp in which users can upload Videos and I can store that videos on the server. I have this bit of code:
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}My question is, should i store the byte array into some text file???Then how can i read it back and get the original format i.e *.avi or *.mpg.
This might be easy,but this is my first time dealing with binary data,so your help would be appreciated.
Thanks
P.S: Any links would be appreciated

Thanks BalusC,
After lots of hardwork finally I am trying to upload the binary file in the database,but getting this error:
java.sql.SQLException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc, file_blob) values(1, 1, 'uploaded file from user', _binary'\0\0�!\0\0�\' at line 1
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
        at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:773)
        at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:168)This is my code thats trying to write that binary file:
public class StoreData {
    private static Log log = LogFactory.getLog(StoreData.class);
    private static final String INSERT_BLOB = "Insert into videos.files (id, owner_id, desc, file_blob)" +
                                              " values(1, 1, 'uploaded file from user', ?)";
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     PreparedStatement stmt = null;
        // Process the FormFile
        FormFile myFile = myForm.getTheFile();
        byte[] bytes = null;
        try{
            bytes = myFile.getFileData();
        }catch(IOException ie){
            log.error("Upload File not Found");
            ie.printStackTrace();
        InputStream is = new ByteArrayInputStream(bytes);
        try {
            stmt = conn.prepareStatement(INSERT_BLOB);
            stmt.setBinaryStream(1,is,bytes.length);
            stmt.execute();
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            log.error("Error writing data to file:");
            e.printStackTrace();
     } finally {
         ConnectionUtil.closeStatement(stmt);
         ConnectionUtil.closeConnection(conn);
}Looking for some help here.....

Write binary data

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