How to download file in jsp

Hi guys,
I am a new member to this java community. I meet some problems in doing my project, hope you experts can help me.
I want to add a download button in my jsp code. When users click the button, a file will be downloaded to his local computer. The files are ASCII files with .asc as extension. My server is Apache 1.3.19 with tomcat 3.2.1 . What kind of code should I add to my jsp?
Anyone's quick response is greatly appreciated.

Thanks for your reply.
I have tried to use the hyper link in html. But since it's ASCII file with .asc extension, every time the link is clicked, the file is opened directly instead of offering save option. So maybe some special code is needed.
Many software web site provides download page. When user clicks the download button, the file will be transfered to user's computer. Does anyone knows how to do it?
Thanks.

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How to download files in jsp code {through save dialog}

can you help me to download files in jsp code {through save dialog}
i use the following code but it saves the jsp page instead of the downloaded file but with the name of the wanted file to be downloaded
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "no-cache");
*** download file
if((trans !=null)&&(trans.equals("download")) )
response.setContentType ("application/x-download");
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Can you try below code, It should work...
<%
String myFileName = request.getParameter("fileName");
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment; filename=\"" + myFileName + "\"");
String root = "D:/";
InputStream in = null;
ServletOutputStream outs = response.getOutputStream();
try {
in = new BufferedInputStream
(new FileInputStream(root + myFileName));
int ch;
while ((ch = in.read()) != -1) {
outs.print((char) ch);
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if (in != null) in.close(); // very important
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How to download file from application server

Hi Experts,
              I developed report and execute in background mode. for this i used Open dataset transfer and close dataset . i got the requried output . But in this case user want downloaded file on presentation server so can anyone tell me How to download file from application server?
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This code will download a file to your Client package by package, so it will also work for huge files.
*& Report ZBI_DOWNLOAD_APPSERVER_FILE
REPORT zbi_download_appserver_file.
PARAMETERS: lv_as_fn TYPE sapb-sappfad
DEFAULT '/usr/sap/WBP/DVEBMGS00/work/ZBSPL_R01.CSV'.
PARAMETERS: lv_cl_fn TYPE string
DEFAULT 'C:\Users\atsvioli\Desktop\Budget Backups\ZBSPL_R01.CSV'.
START-OF-SELECTION.
CONSTANTS blocksize TYPE i VALUE 524287.
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DATA lv_fil TYPE epsf-epsfilnam.
DATA lv_dir TYPE epsf-epsdirnam.
DATA ls_data TYPE ty_datablock.
DATA lt_data TYPE STANDARD TABLE OF ty_datablock.
DATA lv_block_len TYPE i.
DATA lv_package_len TYPE i.
DATA lv_subrc TYPE sy-subrc.
DATA lv_msgv1 LIKE sy-msgv1.
DATA lv_processed_so_far TYPE p.
DATA lv_append TYPE c.
DATA lv_status TYPE string.
DATA lv_filesize TYPE p.
DATA lv_percent TYPE i.
"Determine size
SPLIT lv_as_fn AT '/' INTO lv_dir lv_fil.
CALL FUNCTION 'EPS_GET_FILE_ATTRIBUTES'
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      dir_name       = lv_dir
    IMPORTING
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OPEN DATASET lv_as_fn FOR INPUT IN BINARY MODE MESSAGE lv_msgv1.
IF sy-subrc <> 0.
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ENDIF.
lv_processed_so_far = 0.
DO.
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    lv_package_len = 0.
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      CLEAR lv_block_len.
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      ELSE.
        lv_append = 'X'.
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          bin_filesize         = lv_package_len
          filename             = lv_cl_fn
          filetype             = 'BIN'
          append               = lv_append
          show_transfer_status = abap_false
        TABLES
          data_tab             = lt_data.
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      "Status display
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      EXIT.
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ENDDO.
"Close the file on application server
CLOSE DATASET lv_as_fn.

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response.setHeader("Content-Disposition", "attachment;filename=\""+file.getName()+"\";");
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response.setContentLength((int) file.length());
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How to download files from Application Server of Unix o.s to local director

Hi All,
I am trying to download files from Apllication server of Unix operating Systems to local file in excel sheet format using a z-program.but whenever I am trying to use OPEN dataset ........
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Thanks in advance,
Regards,
AMEER.

Hi Sreekanth,
Thanks a lot for quick reply.I have to download that files from z-program only. I am giving you my code below.
*& Report ZTRAK_DOWNLOAD                                         *
REPORT ZTRAK_DOWNLOAD MESSAGE-ID ZCT                   .
SELECTION-SCREEN BEGIN OF BLOCK DOWNLOAD WITH FRAME TITLE TEXT1.
PARAMETERS :
       SERDIR LIKE RLGRAP-FILENAME DEFAULT '/usr/trak',
       LOCDIR LIKE RLGRAP-FILENAME DEFAULT 'C:\Trak'.
SELECTION-SCREEN END OF BLOCK DOWNLOAD .
SELECTION-SCREEN BEGIN OF BLOCK INFO2 WITH FRAME.
       SELECTION-SCREEN COMMENT 1(79) TEXT2.
       SELECTION-SCREEN SKIP.
       SELECTION-SCREEN COMMENT 1(79) TEXT3.
SELECTION-SCREEN END OF BLOCK INFO2 .
SELECTION-SCREEN BEGIN OF BLOCK INFO3 WITH FRAME.
       SELECTION-SCREEN COMMENT 1(79) TEXT4.
       SELECTION-SCREEN SKIP.
       SELECTION-SCREEN COMMENT 1(79) TEXT5.
        SELECTION-SCREEN SKIP.
       SELECTION-SCREEN COMMENT 1(79) TEXT6.
       SELECTION-SCREEN SKIP 1.
       SELECTION-SCREEN COMMENT 1(79) TEXT7.
       SELECTION-SCREEN SKIP 2.
       SELECTION-SCREEN COMMENT 1(79) TEXT8.
SELECTION-SCREEN SKIP 1.
       SELECTION-SCREEN COMMENT 1(79) TEXT9.
SELECTION-SCREEN END OF BLOCK INFO3.
*- Internal Table to output data in Excel
DATA: BEGIN OF tab_excel OCCURS 0,
        col1(50),
        col2(132),
        col3(255),
        col4(100),
        col5(100),
        col6(50),
        COL7(60),
        col8(30),
        col9(30),
        col10(30),
        col11(20),
        col12(15),
        col13(15),
      END OF tab_excel.
DATA: FILE LIKE RLGRAP-FILENAME .
DATA: W_DATASET(80).
INITIALIZATION.
TEXT1 = 'Download Reports'.
TEXT2 = 'The Program downloads the reports generated by Trak'.
TEXT3 = 'Utility from Server to Local PC.'.
TEXT4 = 'Check the following before executing the Program.'.
TEXT5 = '     1. A valid Server path is provided.'.
TEXT6 = '     2. A valid Local PC path is provided.'.
TEXT7 = '     3. Local PC has 10 MB free space.'.
TEXT8 = 'The report can be executed in the forground.'.
TEXT9 =
'The report should be executed after execution of Transaction TRAK'.
AT SELECTION-SCREEN.
IF SERDIR EQ ''.
MESSAGE E001(ZCT).
ENDIF.
IF LOCDIR EQ ''.
MESSAGE E002(ZCT).
ENDIF.
START-OF-SELECTION.
Download ABAP Development Summary Report
FILE = '\ABAP_Report_Developments.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/ABAP_Report_Developments.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download BDC Development Report
FILE = '\BDC_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/BDC_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Development Summary Report
FILE = '\Developments_Summary_Report.XLS' .
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Developments_Summary_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Enhancement Development Report
FILE = '\Enhancement_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Enhancement_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download field exit Development Report
FILE = '\Field_Exit_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Field_Exit_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Frequency & Purpose Report
FILE = '\Frequency_And_Purpose_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Frequency_And_Purpose_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Function Group Developments Report
FILE = '\FunctionGroup_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/FunctionGroup_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Function Module Developments Report
FILE = '\FunctionModule_Developments_Report.XLS' .
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/FunctionModule_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Include Developments Report
FILE = '\Include_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Include_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download UserGroup Developments Report
FILE = '\UserGroup_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/UserGroup_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Modified_Standard_SAP_Objects_Report
FILE = '\Modified_Standard_SAP_Objects_Report.XLS' .
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Modified_Standard_SAP_Objects_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Include Developments Report
*FILE = '\Include_Developments_Report.XLS'.
*CONCATENATE LOCDIR FILE INTO FILE.
*W_DATASET = '/Include_Developments_Report.dat'.
*CONCATENATE SERDIR W_DATASET INTO W_DATASET.
*PERFORM INIT.
Download SAP Script Developments Report
FILE = '\SAP_Scipt_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/SAP_Scipt_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Transaction Developments Report
FILE = '\Transaction_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/Transaction_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download User Exits Developments Report
FILE = '\UserExits_Reports.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/UserExits_Reports.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download ABAP Query Developments Report
FILE = '\ABAPQuery_Developments_Reports.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/ABAPQuery_Developments_Reports.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
Download Functional Area Developments Report
FILE = '\FunctionalArea_Developments_Report.XLS'.
CONCATENATE LOCDIR FILE INTO FILE.
W_DATASET = '/FunctionalArea_Developments_Report.dat'.
CONCATENATE SERDIR W_DATASET INTO W_DATASET.
PERFORM INIT.
MESSAGE S003(ZCT) WITH LOCDIR.
END-OF-SELECTION.
This routine checks whether file exists if yes downloads it to
the Local PC
FORM INIT.
OPEN DATASET W_DATASET FOR INPUT IN TEXT MODE ENCODING DEFAULT.
DO.
   IF SY-SUBRC <> 0.
      EXIT.
   ENDIF.
   READ DATASET W_DATASET INTO tab_excel.
   APPEND tab_excel.
   CLEAR tab_excel.
ENDDO.
     PERFORM DOWNLOAD_FILE.
ENDFORM.
This routine downloads the data in an XL format on local PC
FORM Download_File .
CALL FUNCTION 'WS_DOWNLOAD'
            EXPORTING
                 FILENAME                = FILE
                 FILETYPE                = 'DAT'
            TABLES
                 DATA_TAB                = tab_excel
            EXCEPTIONS
                 FILE_OPEN_ERROR         = 1
                 FILE_WRITE_ERROR        = 2
                 INVALID_FILESIZE        = 3
                 INVALID_TYPE            = 4
                 NO_BATCH                = 5
                 UNKNOWN_ERROR           = 6
                 INVALID_TABLE_WIDTH     = 7
                 GUI_REFUSE_FILETRANSFER = 8
                 CUSTOMER_ERROR          = 9
                 OTHERS                  = 10.
    IF sy-subrc <> 0.
     message ''.       " Error in file transfer
    ELSE.
      CLEAR TAB_EXCEL.
      REFRESH TAB_EXCEL.
      FILE = ''.
      W_DATASET = ''.
    ENDIF.
ENDFORM.
I have created those files in Application Server running in another z-program in background mode.Then I am trying to download those files using above the program.I am creating those trak/Trak files manually and I can able to see those files in A.S level.But when downloading the same files I am facing the problem.
regards,
Ameer

How to download file with Save As dialog

I am trying to download files with a Save As dialog, according to Jason Hunter's instructions in Jave Enterprise Best Practices.
String filename = "content.txt";
// set the headers
res.setContentType( "application/x-download" );
res.setHeader( "Content-Disposition", "attachment; filename=" + filename);
// send the file
OutputStream out = res.getOutputStream();
returnFile( filename, out);
The file content.txt is in the root directory of my webapp. But I get this stack:
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.io.FileNotFoundException: content.txt (The system cannot find the file specified)
     at java.io.FileInputStream.open(Native Method)
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     at com.interwoven.cssdk.examples.servlets.FileDownloadServlet.returnFile(FileDownloadServlet.java:43)
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     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
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     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
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The root of the webservers changes from server to server and
sometimes it depends on the path you run webserver exe.
The best i have found to overcome this kind of problems is by
using getResourceAstream() method which basically looks at classpath locations only, but still this has some problems like it should kept at the
specified classpath becoz the getResourceAsStrem() method is not static
method and it always associated with the class object and the file
accessing also should be in the same package/classpath.
by using getResourceastream you cannot look at other places (except classpaths)
and this should be used only if you looking for .properites definitions.
the Second best method is
see you have a file called "context.txt" right
before you create a file, first create a directory at the root, let say
"\tmp"
and then create a file \tmp\context.txt
and then open an output stream to it either using fileoutputstreamm...
and then write all output content to servlet/client output stream.
this will be the best becoz you are specifying the "\" the root
and this is common for all operating systems and definitely it will create at the root directory either serverroot or harddiskdrives root
so you will never missout and the exceptin will also not comes along the way
cheers..
if you get new thing , let me know
bye
with regards
Lokesh T.C

How to download files or video from safari to be saved in an Apps?

Hi, can I find out a way to download video opened in safari in iPad, but don't want to save it in iPad and use up the space. Is there any Apps that I can save those files downloaded? Thanks!

You can't download files in Safari anyway, but even if you use another app to save the video, it will still take up space on your iPad.
It's not possible to store something on your iPad without it taking up space.

Urgent!! downloading file in jsp

hi all
can anyone plz help me in downloading file from my disk
actual scenario is like this
i have uploaded file path in database, and whole file in to my disk....
i have given links to file name and when one clicks the link the file of that link should be downloaded / opened from the path specified in the database
its really too urgent
plz help me out

The replies on this post : http://forum.java.sun.com/thread.jspa?threadID=5170452&messageID=9655276 should give you some idea

How to download file in jsp

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