【ABAP系列】SAP ABAP 实现FTP的文件上传与下载

公众号：matinal

本文作者：matinal

原文出处：http://www.cnblogs.com/SAPmatinal/

原文链接：【ABAP系列】SAP ABAP 实现FTP的文件上传与下载

 

前言部分

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正文部分

在SAP的实际应用中，经常会需要将生成的文件上传到FTP，或从FTP下载相关文档数据。本例实现将本地指定文件上传到FTP，及从FTP下载文件到本地的功能。


从FTP复制文件共有两种方式，一种是直接复制文件，另一种方式是先从FTP读取文件数据到内表，拷贝再写入指定位置文件，不过该功能仅支持文本格式文件（*.TXT,*.DAT），一般不予推荐。


相关函数：


1）FTP_CONNECT：通过账号连接FTP。


2）FTP_COMMAND：执行FTP操作命令（注意，程序中所有命令必须为小写）。


1cd：指定本地文件夹路径；


cd：指定FTP文件夹路径；


put <filename>：上传文件；


get <filename>：下载文件；


3）FTP_SERVER_TO_R3：将FTP上的指定文本文件数据读取到内表。

4）FTP_DISCONNECT：关闭FTP连接。

​
REPORT ZR_EXAMPLE_07 .  
DATA: KEY TYPE I VALUE 26101957,  
    TRFCDEST   LIKE RFCDES-RFCDEST,  
    THANDLE    TYPE I.  
 
INCLUDE:<ICON>.  
*定义输入界面  
SELECTION-SCREEN:BEGIN OF BLOCK FTPLOGIN WITH FRAME TITLE TEXT-001.  
PARAMETERS: P_USER(45) LOWER CASE OBLIGATORY MEMORY ID USR,  
           P_PWD(45) MODIF ID PWD LOWER CASE OBLIGATORY MEMORY ID PWD,  
           P_HOST(15) MEMORY ID HOS OBLIGATORY,  
           FTP_PATH(30) MEMORY ID FPOS OBLIGATORY.  
SELECTION-SCREEN:END OF BLOCK FTPLOGIN.  
 
SELECTION-SCREEN:BEGIN OF BLOCK UPLOAD WITH FRAME TITLE TEXT-002.  
PARAMETERS: P_UPPATH(45),  
         P_FILE(20) .  
SELECTION-SCREEN: BEGIN OF LINE.  
SELECTION-SCREEN: PUSHBUTTON 1(20) PUBU USER-COMMAND UPLOAD.  
SELECTION-SCREEN: END OF LINE.  
SELECTION-SCREEN:END OF BLOCK UPLOAD.  
 
SELECTION-SCREEN:BEGIN OF BLOCK DOWNLOAD WITH FRAME TITLE TEXT-003.  
PARAMETERS: DL_PATH(45),  
           DL_FILE(20) .  
SELECTION-SCREEN: BEGIN OF LINE.  
SELECTION-SCREEN: PUSHBUTTON 1(20) GEBU USER-COMMAND DOWNLOAD.  
SELECTION-SCREEN: PUSHBUTTON 24(30) SHBU USER-COMMAND ITAB_DL.  
SELECTION-SCREEN: END OF LINE.  
SELECTION-SCREEN:END OF BLOCK DOWNLOAD.  
 
AT SELECTION-SCREEN OUTPUT.  
* 对密码输入栏进行加密处理  
  PERFORM MASK_PWD.  
 
* 给各按钮加入文本及图标  
  WRITE ICON_OUTGOING_OBJECT  AS ICON TO PUBU.  
  CONCATENATE PUBU 'Upload FTP' INTO PUBU SEPARATED BY SPACE.  
 
  WRITE ICON_INCOMING_OBJECT  AS ICON TO GEBU.  
  CONCATENATE GEBU 'FTP download' INTO GEBU SEPARATED BY SPACE.  
 
  WRITE ICON_WRITE_FILE  AS ICON TO SHBU.  
  CONCATENATE SHBU 'Internal table download' INTO SHBU SEPARATED BY  
SPACE.  
 
AT SELECTION-SCREEN.  
  PERFORM FTPCONNECT.  
  IF SY-SUBRC <> 0.  
 MESSAGE I001(00) WITH 'Can''t connect to FTP!'.  
 EXIT.  
  ENDIF.  
 
  MESSAGE S001(00) WITH 'FTP connect OK!'.  
  CASE SY-UCOMM.  
 WHEN 'ONLI'.  
   PERFORM FTPDISCONNECT.  
   EXIT.  
  ENDCASE. 

​

​
*执行FTP功能  
  PERFORM FTP_EXECUTE.  
*关闭FTP连接  
  PERFORM FTPDISCONNECT.  
*-----------------------------------------------------------------------------*  
*       改变密码输入框显示属性，实现密码保护        *  
*-----------------------------------------------------------------------------*  
FORM MASK_PWD.  
  LOOP AT SCREEN .  
 IF SCREEN-NAME = 'P_PWD'.  
   SCREEN-INVISIBLE = '1'.  
   MODIFY SCREEN .  
   CONTINUE.  
 ENDIF.  
  ENDLOOP.  
ENDFORM.                    "  
 
*-----------------------------------------------------------------------------*  
*       通过IP、用户名、密码连接FTP服务器         *  
*-----------------------------------------------------------------------------*  
FORM FTPCONNECT.  
  DATA: THOSTS(45),TUSERS(45),TPWORD(45).  
  THOSTS = P_HOST.  
  TUSERS = P_USER.  
  TPWORD = P_PWD.  
* 对密码数值进行加密解析处理  
  CALL 'AB_RFC_X_SCRAMBLE_STRING'     " System Function  
 ID 'SOURCE'      FIELD TPWORD  
 ID 'KEY'         FIELD KEY  
 ID 'SCR'         FIELD 'X'  
 ID 'DESTINATION' FIELD TPWORD  
 ID 'DSTLEN'      FIELD 64.  
 
* 定义RFC连接目标，前后台执行时不同  
  IF SY-BATCH = 'X'.  
 TRFCDEST = 'SAPFTPA'.  
  ELSE.  
 TRFCDEST = 'SAPFTP'.  
  ENDIF.  
 
*该函数可以定义有网关时账户密码，一般公司内部访问时无此设置  
  CALL FUNCTION 'FTP_CONNECT'  
 EXPORTING  
   USER                 = TUSERS 
   PASSWORD             = TPWORD 
   HOST                 = THOSTS 
   RFC_DESTINATION      = TRFCDEST 
IMPORTING  
  HANDLE                = THANDLE 
EXCEPTIONS  
  NOT_CONNECTED     = 1 
  OTHERS                = 2.  
ENDFORM.                " FTPCONNECT  
*&---------------------------------------------------------------------  
*&     设置结束时关闭SAP  
*&---------------------------------------------------------------------  
FORM FTPDISCONNECT.  
  CALL FUNCTION 'FTP_DISCONNECT'  
    EXPORTING  
         HANDLE = THANDLE.  
ENDFORM.                    " FTPDISCONNECT  
*&---------------------------------------------------------------------*  
*&      通过SAP执行命令上传或下载FTP文件  
*&---------------------------------------------------------------------*  
FORM FTP_EXECUTE.  
  DATA:TSUBRC LIKE SY-SUBRC.  
  DATA:BEGIN OF COM OCCURS 0,  
      CMD(100) TYPE C,  
    END OF COM.  
  DATA:BEGIN OF RES OCCURS 0,  
      LINE(100) TYPE C,  
    END OF RES.  
 
*指定FTP文件夹路径  
  IF NOT FTP_PATH IS INITIAL.  
 CONCATENATE 'cd' FTP_PATH INTO COM-CMD SEPARATED BY ' '.  
 APPEND COM.  
  ENDIF.  
 
  CASE SY-UCOMM.  
 WHEN 'UPLOAD'.  
*指定上传文件夹路径及上传文件命令  
   CONCATENATE 'lcd' P_UPPATH INTO COM-CMD SEPARATED BY ' '.  
   APPEND COM.  
   CONCATENATE 'put' P_FILE INTO COM-CMD SEPARATED BY ' '.  
   APPEND COM.  
 
 WHEN 'DOWNLOAD'.  
*指定下载文件夹路径及下载文件命令  
   CONCATENATE 'lcd' DL_PATH INTO COM-CMD SEPARATED BY ' '.  
   APPEND COM.  
   CONCATENATE 'get' DL_FILE INTO COM-CMD SEPARATED BY ' '.  
   APPEND COM.  
  ENDCASE.  
 
  LOOP AT COM FROM 1.  
 IF COM-CMD <> ''.  
*执行FTP指令  
   CALL FUNCTION 'FTP_COMMAND'  
        EXPORTING  
             HANDLE        = THANDLE 
             COMCOMMAND       = COM-CMD  
        TABLES  
             DATA          = RES 
        EXCEPTIONS  
             TCPIP_ERROR   = 1 
             COMMAND_ERROR = 2 
             DATA_ERROR    = 3 
             OTHERS        = 4.  
 
*当执行失败时回执数据并退出  
   IF SY-SUBRC <> 0.  
     CASE SY-UCOMM.  
       WHEN 'UPLOAD'.  
         MESSAGE E001(00) WITH 'FTP UPLOAD FAIL!'.  
       WHEN 'DOWNLOAD'.  
         MESSAGE E001(00) WITH 'FTP DOWNLOAD FAIL!'.  
     ENDCASE.  
     EXIT.  
   ELSE.  
 
*根据不同按钮的功能码判断程序执行逻辑及回执信息，当选择从内表下载功能时转入子程序  
     CASE SY-UCOMM.  
       WHEN 'UPLOAD'.  
         MESSAGE S001(00) WITH 'FTP UPLOAD SUCCESS!'.  
       WHEN 'DOWNLOAD'.  
         MESSAGE S001(00) WITH 'FTP DOWNLOAD SUCCESS!'.  
       WHEN 'ITAB_DL'.  
         PERFORM DL_ITAB USING THANDLE DL_PATH DL_FILE.  
     ENDCASE.  
   ENDIF.  
 ENDIF.  
  ENDLOOP.  
 
  CLEAR:COM,RES,TSUBRC.  
  REFRESH:COM,RES.  
ENDFORM.                    " FTPPUTFILE 

​

​
*---------------------------------------------------------------------*  
*      将FTP文本类型文件数据读取到内表       *  
*---------------------------------------------------------------------*  
FORM DL_ITAB USING THANDLE  TYPE I  
                VALUE(FILEPATH) TYPE C  
                FILENAME TYPE C.  
  DATA: BEGIN OF BLOB OCCURS 0,  
       LINE(255) TYPE C,  
     END OF BLOB.  
*连接字符串定义本地文件具体路径  
CONCATENATE FILEPATH FILENAME INTO FILEPATH.  
 
*将FTP文本类型文件数据读取到内表  
*若所读FTP文件为非文本文件（*.txt,*.dat）时将出现错误  
  CALL FUNCTION 'FTP_SERVER_TO_R3'  
    EXPORTING  
         HANDLE = THANDLE 
         FNAME  = FILENAME 
    TABLES  
         BLOBBLOB   = BLOB.  
 
*读取文件失败时退出程序并回执错误  
  IF SY-SUBRC <> 0.  
 MESSAGE E001(00) WITH 'Read FTP File FAIL!'.  
 EXIT.  
  ENDIF.  
 
*将内表数据下载到本地文件  
  CALL FUNCTION 'WS_DOWNLOAD'  
    EXPORTING  
         FILENAME            = FILEPATH 
         FILETYPE            = 'DAT' 
    TABLES  
         DATA_TAB            = BLOB 
    EXCEPTIONS  
         FILE_OPEN_ERROR     = 1 
         FILE_WRITE_ERROR    = 2 
         INVALID_FILESIZE    = 3 
         INVALID_TABLE_WIDTH = 4 
         INVALID_TYPE        = 5.  
 
*将数据写入本地文件失败时回执错误  
  IF SY-SUBRC <> 0.  
 MESSAGE E001(00) WITH 'FTP Download By Internal table FAIL!'.  
  ELSE.  
 MESSAGE S001(00) WITH 'FTP Download By Internal table SUCCESS!'.  
  ENDIF.  
ENDFORM. 

​