Dynamically transfer files via FTP
Search400.com expert Tim Granatir provides a general-purpose program that dynamically creates an AS/400 FTP script, runs the FTP and then checks for errors.
Here is a general-purpose program that dynamically creates an AS/400 FTP script, runs the FTP and then checks for...
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errors. This program can be called from a job stream to dynamically transfer a file. Although this program is fully functional as is, I prefer to think of it more as a starting point for more specific types of processes.
If you are using to this to transfer save files from one AS/400 system to another, you'll want to make sure that the binary is added to your FTP script file. Also, when transferring save files, I prefer to add NAMEFMT 1 to my FTP script file so that I don't have to pre-create the save file on the system that will be receiving the save file. If you use NAMEFMT 1, you will have to specify file names in a directory type format such as /qsys.lib/mylib.lib/mysavf.savf
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In the manuals, it says that FTP errors should begin with a 4 or a 5 and the program FTP20C will catch those and report those types of errors. In reality, I've found a couple nuances to this approach. The first one is that if you have an incorrect system name to start the FTP, that error does not begin with a 4 or a 5. The second thing I've found, and I've only seen this when working with systems when one of them was not an AS/400, is that some errors that I would consider warnings show up in the error file. The FTP still completes normally, but an error is logged. Your options at that point are to change your FTP script to not generate the warning or monitor for it in your error-checking program (FTP20C).
Some information about the program
FTP10C is the program that creates the FTP script, does the FTP transfer and calls the error-monitoring program. I prefer to create the FTP script file (FILFTP) in qtemp so that multiple users can run this program at the same time without interfering with one another.
A description of the parms:
- &PROCESS -- the name of your process so that you have something to refer to in case of an error
- &FILE -- the file you want to transfer
- &LCLDIR -- your local library or directory that you want to transfer to or from
- &RMTDIR -- the library or directory on the target machine that you want to transfer to or from
- &PUTGET -- P, G or D for a (P)ut, (G)et or a (D)elete
- &SYSTEM -- the system name of your target machine. This can be an IP address or the name of an entry in your host table
- &ERR -- This will be set to a 1 if an error is detected
FILFTP - FTP Input and output files
A R FTPFM
A FTPDTA 80A COLHDG('FTP COMMANDS')
FTP10C- FTP Create and process FTP script
PGM PARM(&PROCESS &FILE &LCLDIR &RMTDIR &PUTGET +
&SYSTEM &ERR)
DCL VAR(&USER) TYPE(*CHAR) LEN(10)
DCL VAR(&PWD) TYPE(*CHAR) LEN(10)
DCL VAR(&PROCESS) TYPE(*CHAR) LEN(20) /* Name of +
process */
DCL VAR(&DTA) TYPE(*CHAR) LEN(80)
DCL VAR(&RMTDIR) TYPE(*CHAR) LEN(40)
DCL VAR(&LCLDIR) TYPE(*CHAR) LEN(40)
DCL VAR(&SYSTEM) TYPE(*CHAR) LEN(20)
DCL VAR(&BLKDTA) TYPE(*CHAR) LEN(80)
DCL VAR(&FILE) TYPE(*CHAR) LEN(40)
DCL VAR(&ERR) TYPE(*CHAR) LEN(1)
DCL VAR(&PUTGET) TYPE(*CHAR) LEN(1) /* DO A PUT, +
GET or Delete- "P" OR "G" or "D" */
DCL VAR(&DBLIB) TYPE(*CHAR) LEN(10)
/* CREATE FTP SCRIPT FILES */
RTVOBJD OBJ(FILFTP) OBJTYPE(*FILE) RTNLIB(&DBLIB)
CHKOBJ OBJ(QTEMP/FILFTP) OBJTYPE(*FILE)
MONMSG MSGID(CPF9801 CPF3142) EXEC(DO)
CRTDUPOBJ OBJ(FILFTP) FROMLIB(&DBLIB) OBJTYPE(*FILE) +
TOLIB(QTEMP)
ENDDO
CHKOBJ OBJ(QTEMP/FTPOUT) OBJTYPE(*FILE)
MONMSG MSGID(CPF9801 CPF3142) EXEC(DO)
CRTDUPOBJ OBJ(FILFTP) FROMLIB(&DBLIB) OBJTYPE(*FILE) +
TOLIB(QTEMP) NEWOBJ(FTPOUT)
ENDDO
CLRPFM FILE(QTEMP/FILFTP)
CLRPFM FILE(QTEMP/FTPOUT)
/* DO FTP */
OVRDBF FILE(FILFTP) TOFILE(QTEMP/FILFTP) MBR(*FIRST)
OVRDBF FILE(INPUT) TOFILE(QTEMP/FILFTP) MBR(*FIRST)
OVRDBF FILE(OUTPUT) TOFILE(QTEMP/FTPOUT) MBR(*FIRST)
/* CREATE DYNAMIC FTP */
RTVDTAARA DTAARA(FTP1) RTNVAR(&USER)
RTVDTAARA DTAARA(FTP2) RTNVAR(&PWD)
CHGVAR VAR(&DTA) VALUE(&BLKDTA)
CHGVAR VAR(&DTA) VALUE(&USER *BCAT &PWD)
CALL PGM(FTP15R) PARM(&DTA)
CHGVAR VAR(&DTA) VALUE(&BLKDTA)
CHGVAR VAR(&DTA) VALUE('cd' *BCAT &RMTDIR)
CALL PGM(FTP15R) PARM(&DTA)
CHGVAR VAR(&DTA) VALUE(&BLKDTA)
CHGVAR VAR(&DTA) VALUE('lcd' *BCAT &LCLDIR)
CALL PGM(FTP15R) PARM(&DTA)
CHGVAR VAR(&DTA) VALUE(&BLKDTA)
IF COND(&PUTGET = 'D') THEN(CHGVAR VAR(&DTA) +
VALUE('del' *BCAT &FILE))
IF COND(&PUTGET = 'P') THEN(CHGVAR VAR(&DTA) +
VALUE('put' *BCAT &FILE))
IF COND(&PUTGET = 'G') THEN(CHGVAR VAR(&DTA) +
VALUE('get' *BCAT &FILE *BCAT '(replace'))
CALL PGM(FTP15R) PARM(&DTA)
CHGVAR VAR(&DTA) VALUE(&BLKDTA)
CHGVAR VAR(&DTA) VALUE('quit')
CALL PGM(FTP15R) PARM(&DTA)
FTP RMTSYS(&SYSTEM)
CHGVAR VAR(&ERR) VALUE(' ')
CALL PGM(FTP20C) PARM(&PROCESS &ERR)
ENDPGM:
DLTOVR FILE(INPUT)
MONMSG MSGID(CPF0000)
DLTOVR FILE(OUTPUT)
MONMSG MSGID(CPF0000)
ENDPGM
FTP200C- FTP Check for FTP errors
PGM PARM(&PROCESS &ERR)
DCL VAR(&MSG) TYPE(*CHAR) LEN(512)
DCL VAR(&BLKMSG) TYPE(*CHAR) LEN(512)
DCL VAR(&ERR) TYPE(*CHAR) LEN(1)
DCL VAR(&PROCESS) TYPE(*CHAR) LEN(20)
DCLF FILE(FILFTP)
CHGVAR VAR(&ERR) VALUE(' ')
OVRDBF FILE(FILFTP) TOFILE(QTEMP/FTPOUT)
RCVF:
RCVF
MONMSG MSGID(CPF0864) EXEC(GOTO CMDLBL(ENDPGM))
IF COND(%SST(&FTPDTA 1 1) *EQ '4' *OR +
%SST(&FTPDTA 1 1) *EQ '5') THEN(DO)
CHGVAR VAR(&ERR) VALUE('1')
CHGVAR VAR(&MSG) VALUE(&BLKMSG)
CHGVAR VAR(&MSG) VALUE('******' *BCAT +
&PROCESS *BCAT 'FTP PROCESS HAS STOPPED +
WITH THE FOLLOWING ERROR -' *BCAT &FTPDTA)
SNDMSG MSG(&MSG) TOUSR(*SYSOPR)
ENDDO
GOTO CMDLBL(RCVF)
ENDPGM:
ENDPGM
FTP15R- Write FTP script records A***************************************************************** A* * A* Pgm Name...... FTP15R * A* Description... CREATE DYNAMIC FTP DATA * A* * A* *NOTE FILFTP IS OVERRIDEN BEFORE THIS PROGRAM IS CALLED * A* * A***************************************************************** FFILFTP O E DISK C *ENTRY PLIST C PARM PDTA 80 C* C MOVELPDTA FTPDTA C WRITEFTPFM C* C SETON LR
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About the author: Tim is vice president of Technical Services at Interlink Technologies in Maumee, Ohio, where he serves as chief architect for their warehouse management system. He has worked in the banking, insurance, healthcare and distribution industries in various positions, including programmer/analyst, systems analyst and DP manager. Tim has worked on IBM midrange platforms since 1983.
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