Reading files from Servlets

Hello
          Is it possible to configure WebApplication or server-based "default"
          directory for file i/o? I'd have need to read *.property-files that differ
          from one WebApplication to another (eg http://server/app1 needs different
          property-files than http://server/app2 - but they would be otherwise
          identical, same html, same servlets...).
          At the moment I have impression that no matter where servlet is located, if
          it opens a file, the "default" path is root-directory of WebLogic
          installation (/opt/weblogic for example) and all paths are relative to that.
          Thanks, Heikki
          Heikki Paatela, Designer, Yomi Vision Ltd
          P.O. Box 14, Kiviaidankatu 2 A, 00211 Helsinki, Finland
          Tel. +358 10 240 3827, GSM +358 50 337 1587
          Fax +358 10 240 3809, http://www.yomi.com

Check out javax.servlet.ServletContext method getRealPath
It returns the directory on your file system which is mapped to the root directory of your web context. In your case probably "c:/Tomcat/webapps/TestApp"
Using that as a starting point, you can probably accomplish what you wish to.
Good luck,
evnafets

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go through this article
http://www.onjava.com/pub/a/onjava/2001/04/05/upload.h
tml?page=1 it gives you step by step instructions on
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Hi,
I am new to Java Servlet and HTML template language ( anyfile.tmpl).
I have created simple login authentication with user registration for new user.
If user already exists, after successful login, he should be navigated to INBOX page (that inbox page is some inbox.tmpl file) from SERVLET itself using following BOLD statements given in code below. But its not working.. :-( Please do the needful.
Thank you.
if (session == null) {
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          userName = request.getParameter("login");
          pwd = request.getParameter("password");
          if (!userName.equals("") && !pwd.equals("")) {
          try {
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// code will go here
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Call batch file from Servlet.

Hi all,
can anybody tell me how to call or run batch file
from Servlet.
Please do hurry.

class RuntimeClass
public static void main(String str[]){
Runtime JVM = Runtime.getRuntime();
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Hi,
i hope the above program will help.

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Your question make no sense. What exactly are you trying to do?

Reading Files from an FTP location based on Timestamp

Hi,
I have a requirement of reading files from an FTP location. The files should be read in the order they were saved in the folder. Can someone tell me how to solve this?
Thanks,
Ravi

Hi Arik,
Thanks for your reply. I tried doing what u said, but it isn't working. My requirement is to List the files in the folder using FTP adapter and get the file name with the least file stamp from the FTP adapter and pass the FileName dynamically to another FTP adapter which reads the file based on the FileName. When i tested after including the property (for listing the files) you mentioned, it is giving the following error (copied from flow trace):
<messages>
<input>
<Invoke_getFileListFTP_FileListing_InputVariable>
<part name="Empty" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<empty xmlns="http://xmlns.oracle.com/pcbpel/adapter/ftp/APP_SequentialFileTransfer/PRJ_SequentialFileTransfer/WS_GetFileList_FTP"/>
</part>
</Invoke_getFileListFTP_FileListing_InputVariable>
</input>
<fault>
<bpelFault>
<faultType>0</faultType>
<bindingFault xmlns="http://schemas.oracle.com/bpel/extension">
<part name="summary">
<summary>Exception occured when binding was invoked. Exception occured
during invocation of JCA binding: "JCA Binding execute of
Reference operation 'FileListing' failed due to: Exception
occured when binding was invoked. Exception occured during
invocation of JCA binding: "Could not instantiate
InteractionSpec
oracle.tip.adapter.ftp.outbound.FTPListInteractionSpec due
to: Cannot set JCA WSDL Property. Error while setting JCA
WSDL Property. Property setListSorter is not defined for
oracle.tip.adapter.ftp.outbound.FTPListInteractionSpec Please
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adapter raised a resource exception. Please examine the above
error message carefully to determine a resolution. ". The
invoked JCA adapter raised a resource exception. Please
examine the above error message carefully to determine a
resolution.</summary>
</part>
<part name="detail">
<detail>Cannot set JCA WSDL Property. Error while setting JCA WSDL
Property. Property setListSorter is not defined for
oracle.tip.adapter.ftp.outbound.FTPListInteractionSpec Please
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</part>
<part name="code">
<code>null</code>
</part>
</bindingFault>
</bpelFault>
</fault>
<faultType>
<message>0</message>
</faultType>
</messages>
Thanks,
Ravi
Edited by: Ravi Santosh on Apr 24, 2012 11:02 PM

Reading file from an external folder.

Iam tring to read an external file from the C:\ drive. Given below is the code.
DATA LV_XLS(100) TYPE C.
DATA LV_CONTENT TYPE XSTRING.
LV_XLS = 'C:\XML\Report.xls'
READ DATASET LV_XLS INTO LV_CONTENT.
But when i execute iam getting an error - FILE NOT FOUND. How do i read file from an external folder. My requirement is to strictly read from an external folder. Please help.
If this is not possible please advice as to how the file could be moved to the SAP root directory. Iam not able to locate the root.

hi,
This is the code to read a excel file from the local system.
Read data set you are using in your code corresponds to files on application server thats the reason its throwing an error.
* Parameter variable declaration for browsing the file location       *
PARAMETERS:
p_file TYPE ibipparms-path OBLIGATORY.
data:
it_text TYPE truxs_t_text_data .
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
CALL FUNCTION 'F4_FILENAME'
   EXPORTING
     program_name        = syst-cprog
*   DYNPRO_NUMBER       = SYST-DYNNR
     field_name          = ' '
   IMPORTING
     file_name           = p_file.
START-OF-SELECTION.
CALL FUNCTION 'TEXT_CONVERT_XLS_TO_SAP'
    EXPORTING
*   I_FIELD_SEPERATOR          =
*   I_LINE_HEADER              =
      i_tab_raw_data             = it_text
      i_filename                 = p_file
    TABLES
      i_tab_converted_data       = t_cust
EXCEPTIONS
    conversion_failed          = 1
    OTHERS                     = 2
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
This is to read a text file from local system.
CALL FUNCTION 'GUI_UPLOAD'
    EXPORTING
    filename                      = 'D:\FILEINTERFACE\file.TXT'
*    FILETYPE                      = 'ASC'
     has_field_separator           = 'X'
*    HEADER_LENGTH                 = 0
*    READ_BY_LINE                  = 'X'
*    DAT_MODE                      = ' '
*    CODEPAGE                      = ' '
*    IGNORE_CERR                   = ABAP_TRUE
*    REPLACEMENT                   = '#'
* IMPORTING
*    FILELENGTH                    =
*    HEADER                        =
    TABLES
      data_tab                      = t_kna1
* EXCEPTIONS
*    FILE_OPEN_ERROR               = 1
*    FILE_READ_ERROR               = 2
*    NO_BATCH                      = 3
*    GUI_REFUSE_FILETRANSFER       = 4
*    INVALID_TYPE                  = 5
*    NO_AUTHORITY                  = 6
*    UNKNOWN_ERROR                 = 7
*    BAD_DATA_FORMAT               = 8
*    HEADER_NOT_ALLOWED            = 9
*    SEPARATOR_NOT_ALLOWED         = 10
*    HEADER_TOO_LONG               = 11
*    UNKNOWN_DP_ERROR              = 12
*    ACCESS_DENIED                 = 13
*    DP_OUT_OF_MEMORY              = 14
*    DISK_FULL                     = 15
*    DP_TIMEOUT                    = 16
*    OTHERS                        = 17
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
PS. In both of the above mentioned function modules make sure that the file structure is similar to the internal tables used.
Thanks
Sharath

Reading file from a folder : File dir = new File(URL+aFile_to_add);

Hi,
Trying to read files from a dir on my site using a JSP and bean. I've tried nearly every option for the filepath I can think of and it doesn't seem to be finding the file...
Here's the bit:
String URL = "images\\wedding_photos\\";
File dir = new File(URL+aFile_to_add);
String[] files = dir.list();
It's working locally, but I obviously had to change the path from c://... to the above.
The full code is listed below in the addWedding Method
The method removes the .jpg from the file name and then writes the new file name to a database
Thanks for any insight.
Regards
Jim
public String addWedding(String aFile_to_add)
String feedback = "unset in scrubWedding";
try
String URL = "images\\wedding_photos\\";
Class.forName("org.gjt.mm.mysql.Driver");
java.sql.Connection connection = java.sql.DriverManager.getConnection("jdbc:mysql://localhost/rhwedd2_shop?user=**********&password=*******");
java.sql.Statement statement = connection.createStatement();
File dir = new File(URL+aFile_to_add);
String[] files = dir.list();
if (files == null)
feedback = "Sorry, couldn't find the file "+aFile_to_add+"...no files have been added.";
else
for (int i=0; i<files.length; i++)
// Get filename of file or directory
String filename = files;
String no_extension;
//convert string array element into a char array
char [] charsfilename = filename.toCharArray();
int newlength = charsfilename.length -4;
no_extension = String.valueOf(charsfilename,0,newlength);
filesAdded = filesAdded+", "+no_extension;
// Show the new file names in stack trace without extension
//System.out.println("String no_extension " + no_extension );
statement.executeUpdate("INSERT INTO items VALUES ('"+no_extension+"',5,'"+aFile_to_add+"')");
// write to table with item_id and weddingid
feedback = "The following files have been added..."+filesAdded;
if (statement != null )
statement.close();
if ( connection != null )
connection.close();
catch(Exception e)
feedback = "Into the catch";
e.printStackTrace(System.err) ;
return feedback;
}//end addWedding

String URL = "images\\wedding_photos\\";
File dir = new File(URL+aFile_to_add); ok, ok, I'll answer...
1) What gives you the impression that the relative directory "images\\..." exists (or, in other words, what makes you think your current directory is the parent of "images"?

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Hi all,
is it possible to read data from non-SAP application Sever?
I'm using OPEN DATASET p_filin FOR INPUT IN LEGACY TEXT MODE CODE PAGE '1504',
Where p_filin is other Windows server.Our applicition server is under Unix.Is it a problem?
I make test to read file from SAP application server and it was ok.So how to call other server?
Thanks!

Hi,
Yes it is possible to read data from a non SAP server through the statement OPEN DATASET.
The important thing to check is that the SAP Server got enough access to the non SAP server so it can perform a reading/writing process depending on your needs.
You should contact your network administrator and BASIS to help you check the permissions. This can be pretty tricky, specially if the servers are in different domains.
Regards,
Gilberto Li

[Urgent] How to read files from different directories?

I am new to Java Programming, I would like to know how to read files from directories other than the current one? (example as follows)
ProjectDirectory
|--MainDirectory
|--MainProgram.java
|--SupplementDirectory
|--SupplementProgram.java
|--Pictures
|--Image.gif
What should I write in the MainProgram.java so that I can use the supplementProgram.java from MainProgram and read the Image.gif file from the MainProgram.java?
Thanks

Run through the I/O tutorial here. It should get you up to speed on this sort of thing...

Can the aTV read files from an iTunes library on my nas drive without my computer being on

I have my itunes library on a My Book Live nas drive that contains all of my digital movies and TV shows. I want to be able to watch my movies from the library without a computer running. I understand that Apple has chosen to chain you to the computer and your itunes account through Home Sharing but I can not see why they couldn't allow you to access a nas drive without a computer running because your aTV is tied to your itunes account also so why do they force you to run a computer 24/7 365 in order to access the files you have bought and paid for.
I have a love/hate for Apple because I love the quality of the products they make but I hate how they make all of the digital files you purchase only accessible through a computer running Home Sharing even though the files are not stored on the computer.
I have tried several things to get this to work without a computer but no luck. The only way I have found to be able to do this is to Jailbreak your aTV and install 3rd party software (which I don't want to do) that will allow you to by pass the computer and Home Sharing (which is dumber than ****) because that is all I want to do is eliminate the need of a computer running wasting electricity (I thought Apple was supposed to be an enviro friendly company, guess not). I am not trying to steal or give someone else my purchased movies and using the aTV and an internet connection they could still be able to tie your media to your itunes account so I just don't get there thinking, or lack of thinking I should say.
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If not is Apple ever going to wake up and allow there customers to actually USE the media they purchase from them without Home Sharing and a computer running?

_Skull wrote:
Can the aTV read files from an iTunes library on my nas drive without my computer being on
no it can't. you need itunes open and running

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Hi,
When i try to read file from server,the following message is displayed .
ORA-29532: Java call terminated by uncaught Java exception: java.security.AccessControlException: the Permission (java.io.FilePermission /tmp read) has not been granted to EWMTRACKTEST. The PL/SQL to grant this is dbms_java.grant_permission( 'EWMTRACKTEST', 'SYS:java.io.FilePermission', ' /tmp', 'read' )
ORA-06512: at "EWMTRACKTEST.GET_DIRLIST_EWM", line 1
ORA-06512: at line 1
thanks and regards
P Prakash

it seems obvious, user EWMTRACKTEST doesn`t have access to directory /tmp and the file under that.
try to give read permission and try again.
you could use command line like 'chmod' to grant permissions.

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Hi Experts,
Presently I have to write a program which reads files from the application server dynamically. This program will be scheduled in the background with the frequency of half an hour.
I am Using the function module
CALL FUNCTION 'SUBST_GET_FILE_LIST'
EXPORTING
DIRNAME = '/usr/sap/xxx/xxx/'
FILENM = 'DATASET'
PATTERN = '.txt'
TABLES
FILE_LIST = IT_FILELIST
I am facing problem in specifying the parameter FILENM in the function module,
As I have to read many files from the apps server. How to assign the parameter of function module so it can take the many files generated in the apps server.
Thanks in Advance,
Regards,
Irfan Hussain

Hi,
Instead of the above FM, you can use the following code :
AT SELECTION-SCREEN ON VALUE-REQUEST FOR po_ifile.
PERFORM get_current_directory USING 'PO_IFILE'   po_ifile
                                          rov-home_dir rov-curr_dir.
    PERFORM get_filename-of-server TABLES itab_filename
                                       USING rov-curr_dir rov-gen_name.
    PERFORM help_values_get_with_table_ext TABLES itab_filename
                                       USING rov-curr_dir
                                                   po_ifile.
*&      Form get_current_directory
      text
     -->P_0023   text
     -->P_PO_IFILE text
     -->P_ROV_HOME_DIR text
     -->P_ROV_CURR_DI text
     -->P_CALL text
     -->P_FUNCTION text
     -->P_0029   text
     -->P_IMPORTING text
     -->P_FILE_NAME text
     -->P_= text
     -->P_PO_IFILE text
FORM get_current_directory USING _fieldname
                                    _filename
                                    homedir
                                    currdir.
    IF _fieldname <> space.
      PERFORM dunp_value_read USING _fieldname _filename.
    ENDIF.
    IF _filename = space.
      currdir = homedir.
    ELSE.
      rov-work_dir = _filename.
      rov-fdpos = STRLEN( rov-work_dir ).
      DO.
        IF rov-fdpos = 0.
          EXIT.
        ENDIF.
        rov-fdpos = rov-fdpos - 1.
        ASSIGN rov-work_dir+rov-fdpos(1) TO <rov_p>.
        IF <rov_p> = rov-delchar.
          <rov_p> = space.
          EXIT.
        ELSE.
          <rov_p> = space.
        ENDIF.
      ENDDO.
      currdir = rov-work_dir.
    ENDIF.
ENDFORM.                    " get_current_directory
*&      Form get_filename-of-server
      text
     -->P_ITAB_FILENAME text
     -->P_ROV_CURR_DIR text
     -->P_ROV_GEN_NAME text
FORM get_filename-of-server TABLES nametab STRUCTURE itabfilename
                              USING _dirname _genname.
    CALL 'C_DIR_READ_FINISH'             " just to be sure
                           ID 'ERRNO' FIELD rov-errno
                           ID 'ERRMSG' FIELD rov-errmsg.
    CALL 'C_DIR_READ_START' ID 'DIR'    FIELD _dirname
                            ID 'FILE'   FIELD _genname
                            ID 'ERRNO' FIELD rov-errno
                            ID 'ERRMSG' FIELD rov-errmsg.
    IF sy-subrc <> 0.
      EXIT.
    ENDIF.
    REFRESH _nametab.
    DO.
      CLEAR _nametab.
      CALL 'C_DIR_READ_NEXT' ID 'TYPE'   FIELD _nametab-type
                              ID 'NAME'   FIELD _nametab-name
                              ID 'LEN'    FIELD _nametab-len
                              ID 'OWNER' FIELD _nametab-owner
                              ID 'MTIME' FIELD _nametab-mtime
                              ID 'MODE'   FIELD _nametab-mode
                              ID 'ERRNO' FIELD _nametab-errno
                              ID 'ERRMSG' FIELD _nametab-errmsg.
      _nametab-dirname = _dirname.
      MOVE sy-subrc TO _nametab-subrc.
      CASE sy-subrc.
        WHEN 0.
          IF _nametab-name+0(1) = '.'.
          ELSE.
            APPEND _nametab.
          ENDIF.
        WHEN 1.
          EXIT.
        WHEN OTHERS.                     " SY-SUBRC >= 2
          EXIT.
      ENDCASE.
    ENDDO.
    CALL 'C_DIR_READ_FINISH'             " just to be sure
                           ID 'ERRNO' FIELD rov-errno
                           ID 'ERRMSG' FIELD rov-errmsg.
ENDFORM.                    " get_filename-of-server
*&      Form help_values_get_with_table_ext
      text
     -->P_ITAB_FILENAME text
     -->P_ROV_CURR_DIR text
     -->P_PO_IFILE text
FORM help_values_get_with_table_ext TABLES _filename
                                             STRUCTURE itab_filename
                                      USING _currdir
                                            _selfile.
    TYPES: BEGIN OF f4typ_head_struc,
             tabname LIKE help_info-tabname,
             fieldname LIKE help_info-fieldname,
             head_text LIKE shstruc-keyword,
           END OF f4typ_head_struc.
   DATA itab_fields    LIKE TABLE OF help_value        WITH HEADER LINE.
   DATA itab_selvals   LIKE TABLE OF help_vtab         WITH HEADER LINE.
   DATA itab_values    LIKE TABLE OF rlgrap-filename   WITH HEADER LINE.
   DATA itab_header    TYPE TABLE OF f4typ_head_struc WITH HEADER LINE.
    REFRESH itab_fields.
    REFRESH itab_selvals.
    REFRESH itab_values.
    REFRESH itab_header.
    itab_fields-tabname    = 'PS0192'.
    itab_fields-fieldname = 'BAA01'.
    itab_fields-selectflag = ' '.
    APPEND itab_fields.
    itab_fields-tabname    = 'RLGRAP'.
    itab_fields-fieldname = 'FILENAME'.
    itab_fields-selectflag = 'X'.
    APPEND itab_fields.
    LOOP AT _filename.
      itab_values = itab_filename-type.
      APPEND itab_values.
      itab_values = itab_filename-name.
      APPEND itab_values.
    ENDLOOP.
    CALL FUNCTION 'HELP_VALUES_GET_WITH_TABLE_EXT'
       EXPORTING
        CUCOL                         = 0
        CUROW                         = 0
        DISPLAY                       = ' '
        FIELDNAME                     = ' '
        TABNAME                       = ' '
        TITLE_IN_VALUES_LIST          = ' '
        SHOW_ALL_VALUES_AT_FIRST_TIME = ' '
        USE_USER_SHRINKING            = ' '
            titel                         = _currdir
        NO_SCROLL                     = ' '
        NO_CONVERSION                 = ' '
        NO_MARKING_OF_CHECKVALUE      = ' '
       IMPORTING
            index                         = rov-index
            select_value                  = rov-selvalue
         TABLES
              fields                        = itab_fields
              select_values                 = itab_selvals
              valuetab                      = itab_values
        HEADING_TABLE                 =
         EXCEPTIONS
              field_not_in_ddic             = 1
              more_then_one_selectfield     = 2
              no_selectfield                = 3
              OTHERS                        = 4.
    IF sy-subrc = 0.
      CLEAR itab_filename.
      READ TABLE itab_filename INDEX rov-index.
      IF itab_filename-type+0(3) = 'dir'.
        CONCATENATE _currdir rov-delchar rov-selvalue rov-delchar
                                                      INTO _selfile.
      ELSE.
        CONCATENATE _currdir rov-delchar rov-selvalue INTO _selfile.
      ENDIF.
    ENDIF.
ENDFORM.                    " help_values_get_with_table_ext
Best regards,
Prashant

Reading file from AS with details

Hi guys,
I want to read files from a directory on AS.
I used the FM SUBST_GET_FILE_LIST.
It works fine, but I'd like to know the file creation date.
I have to use this date time to decide which file I have to manage.
I thought the MTIME field was the answer, but it returns to me a number that I don't understand.
Any idea about it, or is there a FM that give to me the file creation date, modification date ecc
Regards
Jampierre

From the description MTIME is the Unix time - "last modification date, seconds since 1970"; Meaning this number is time in seconds from 1970; Did you check out the MOD_DATE and MOD_TIME fields in the same output table?
There are lot of threads in SDN regarding this and conversion of unix time to std date/time... please search in SDN,
Convert UNIX timestamp into Date and Time
Retrieve File creation date

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