Unzip & Read files with ABAP class CL_ABAP_ZIP
Simone Milesi
Posted onFebruary 19, 2016 4 minute read
Unzip & Read files with ABAP class CL_ABAP_ZIP
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On SCN exist a wiki showing how to create a ZIP file (here http://wiki.scn.sap.com/wiki/display/ABAP/Zip+any+file+via+ABAP+using+CL_ABAP_ZIP ) and a wiki showing how to ZIP a report output in PDF (here http://wiki.scn.sap.com/wiki/display/ABAP/CL_ABAP_ZIP+usage+-+Zipping+ABAP+report+output) but I did not found a guide for opening and using a compressed file.
This little document is just a quick example built from the answer around the SCN (like Want to Unzip a file using CL_ABAP_ZIP | SCN and UNZIP file from ABAP) to show how to use class CL_ABAP_ZIP to read a zip file and show in ALV the content of zipped file but it can easily adapted to manage any other file type (i.e. an image to be displayed).
Objects Used in the Example
Functions Used in the Example
Flow of the report
1. Upload ZIP file
2. Load ZIP into buffer
3. Read packed file
4. Show packed file in ALV
Coding for ZTEST_UNZIP
*&———————————————————————*
*& Report ZTEST_UNZIP
*& AUTHOR: Simone Milesi
*& CREATED ON: 18/02/2016
*&———————————————————————*
*& The report read a zip file from user’s PC and unzip it, showing
*& the content into an alv list
*&———————————————————————*
REPORT ztest_unzip.*&———————————————————————*
*& Class Application
*&———————————————————————*
* Text
*———————————————————————-*
CLASS application DEFINITION.PUBLIC SECTION.
TYPES: BEGIN OF ty_file,name TYPE string,
date TYPE d,
time TYPE t,
size TYPE i,
END OF ty_file.
TYPES: tty_files TYPE TABLE OF ty_file.CLASS-METHODS: execute,get_file CHANGING value(c_file) TYPE string.
PRIVATE SECTION.
CLASS-DATA: t_out TYPE filetable,l_out TYPE file_table,
files TYPE filetable,
t_file TYPE tty_files,
cont TYPE xstring,
file TYPE ty_file.
CLASS-DATA: o_zip TYPE REF TO cl_abap_zip.
CLASS-METHODS: show_alv,fill_out,
upload_data.
ENDCLASS. “ApplicationPARAMETERS: p_file TYPE application=>ty_file–name OBLIGATORY.AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
application=>get_file( CHANGING c_file = p_file ).
START-OF-SELECTION.
application=>execute( ).
*&———————————————————————*
*& Class (Implementation) Application
*&———————————————————————*
* Text
*———————————————————————-*
CLASS application IMPLEMENTATION.
METHOD execute.upload_data( ).
LOOP AT o_zip->files INTO file.CLEAR cont.
o_zip->get( EXPORTING name = file–name
IMPORTING content = cont ).
fill_out( ).
ENDLOOP.show_alv( ).
ENDMETHOD. “execute
METHOD fill_out.
DATA: olen TYPE i,xtab TYPE TABLE OF x255,
ls TYPE string.
CALL FUNCTION ‘SCMS_XSTRING_TO_BINARY’EXPORTING
buffer = cont
IMPORTING
output_length = olen
TABLES
binary_tab = xtab.
CALL FUNCTION ‘SCMS_BINARY_TO_STRING’EXPORTING
input_length = olen
IMPORTING
text_buffer = ls
TABLES
binary_tab = xtab
EXCEPTIONS
failed = 1
OTHERS = 2.
IF sy–subrc <> 0.
EXIT.
ENDIF.DO.
IF ls CA cl_abap_char_utilities=>cr_lf.
SPLIT ls AT cl_abap_char_utilities=>cr_lf INTO l_out
ls.
APPEND l_out TO t_out.ELSE.
EXIT.
ENDIF.
ENDDO.l_out = ls.
APPEND l_out TO t_out.
ENDMETHOD. “fill_out
METHOD upload_data.
DATA:flen TYPE i,xhead TYPE xstring,
xtab TYPE TABLE OF x255.
cl_gui_frontend_services=>gui_upload( EXPORTING filename = p_file
filetype = ‘BIN’
IMPORTING filelength = flen
CHANGING data_tab = xtab ).
CALL FUNCTION ‘SCMS_BINARY_TO_XSTRING’EXPORTING
input_length = flen
IMPORTING
buffer = xhead
TABLES
binary_tab = xtab
EXCEPTIONS
failed = 1
OTHERS = 2.
IF sy–subrc <> 0 OR xhead IS INITIAL.
IF o_zip IS NOT INITIAL.
FREE o_zip.
ENDIF.
ENDIF.CREATE OBJECT o_zip.
o_zip->load( xhead ).
ENDMETHOD. “upload_dataMETHOD show_alv.
DATA: salv TYPE REF TO cl_salv_table,functions TYPE REF TO cl_salv_functions.
cl_salv_table=>factory( IMPORTING r_salv_table = salvCHANGING t_table = t_out ).
functions = salv->get_functions( ).
functions->set_all( abap_true ).
salv->display( ).
ENDMETHOD. “show_Alv
METHOD get_file.
DATA: fresult TYPE file_table,rc TYPE i.
CLEAR files[].
cl_gui_frontend_services=>file_open_dialog(
CHANGING file_table = files
rc = rc ).
IF files[] IS NOT INITIAL.
CLEAR c_file.
READ TABLE files INTO fresult INDEX 1.c_file = fresult.
ENDIF.
ENDMETHOD. “get_file
ENDCLASS. “ApplicationTest Case
Create a TXT file
And zip it (Attention! Do not use Winzip!)
Run your report
And you got your result
Class | Method | Used For
CL_GUI_FRONTED_SERVICES | FILE_OPEN_DIALOG | Chose the input file
CL_GUI_FRONTED_SERVICES | FILE_UPLOAD | Upload the file
CL_ABAP_ZIP | LOAD | Read the zip file in the buffer
CL_ABAP_ZIP | GET | Read compressed file’s content
CL_SALV_TABLE | FACTORY | Create ALV grid
CL_SALV_TABLE | SHOW | Display ALV grid
CL_SALV_TABLE | GET_FUNCTIONS | Retrieve available SALV functions
CL_SALV_FUNCTIONS | SET_ALL | Activate ALV Functions
Class | Used For
SCMS_BINARY_TO_XSTRING | Convert Binary stream file into XSTRING
SCMS BINARY_TO_STRING | Convert Binary stream into STRING
SCMS XSTRING_TO_BINARY | Convert XSTRING data in Binary
