FTP_connect with a proxy server

[Former Member]

Hi,

I'm trying to connect to an external ftp-server via a proxy FTP-server using function ftp_connect.

I'm using the gateway parameters to connect to the proxy, but the function always returns an error saying that the user doesn't have access to the external FTP-server. I know the users and passwords are correct. Is it the correct way to use the gateway parameters? What is the account parameter for?

Thanks,

Wim

[Former Member]

Check below code... It may help U...

DATA: l_slen TYPE i,

l_error,

l_pwd(30) TYPE c.

CONSTANTS: c_dest TYPE rfcdes-rfcdest VALUE 'SAPFTP',

c_key TYPE i VALUE 26101957.

l_error = 0.

• connect to ftp server

l_pwd = p_pwd.

l_slen = STRLEN( l_pwd ).

CALL FUNCTION 'HTTP_SCRAMBLE'

EXPORTING

SOURCE = l_pwd

sourcelen = l_slen

key = c_key

IMPORTING

destination = l_pwd.

CALL FUNCTION 'SAPGUI_PROGRESS_INDICATOR'

EXPORTING

text = 'Connect to FTP Server'.

• To Connect to the Server using FTP

CALL FUNCTION 'FTP_CONNECT'

EXPORTING

user = p_user

password = l_pwd

host = p_host

rfc_destination = c_dest

IMPORTING

handle = w_hdl

EXCEPTIONS

OTHERS = 1.

IF sy-subrc <> 0.

MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.

ENDIF.

CLEAR : w_outfile, w_file_count.

MOVE 'ERC/GLOBALSAP/M_ERC_GLOBALSAP_COACODE' TO w_outfile.

PERFORM download_to_ftp TABLES it_coacode USING w_outfile.

w_file_count = w_file_count + 1.

CLEAR : w_outfile.

• To disconnect the FTP

CALL FUNCTION 'FTP_DISCONNECT'

EXPORTING

handle = w_hdl.

• To disconnect the RFC Connection

CALL FUNCTION 'RFC_CONNECTION_CLOSE'

EXPORTING

destination = c_dest

EXCEPTIONS

OTHERS = 1.

FORM download_to_ftp TABLES it_tab

USING l_string TYPE char64.

CALL FUNCTION 'FTP_R3_TO_SERVER'

EXPORTING

handle = w_hdl

fname = l_string

character_mode = 'X'

TABLES

text = it_tab[]

EXCEPTIONS

tcpip_error = 1

command_error = 2

data_error = 3

OTHERS = 4.

IF sy-subrc <> 0.

MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4

RAISING invalid_output_file.

ENDIF.

ENDFORM. " download_to_ftp

[Former Member]

Hi Ramesh,

This was not my question. I know how to connect directly to an FTP-server.

My question is how to connect via a proxy-server.

Kr,

Wim

[Former Member]

Nobody has ever done this before?

[Former Member]

hi wim,

we have the same problem. now - do you have a nice solution?

manually i have transfer data via http-proxy in ftp with total commander - a nice quick ftp-client.

###

IMPORTING

*" VALUE(USER) TYPE C

*" VALUE(PASSWORD) TYPE C

*" VALUE(ACCOUNT) TYPE C OPTIONAL

*" VALUE(HOST) TYPE C

*" VALUE(RFC_DESTINATION) LIKE RFCDES-RFCDEST

*" VALUE(GATEWAY_USER) TYPE C OPTIONAL

*" VALUE(GATEWAY_PASSWORD) TYPE C OPTIONAL

*" VALUE(GATEWAY_HOST) TYPE C OPTIONAL

*" EXPORTING

*" VALUE(HANDLE) TYPE I

*" EXCEPTIONS

*" NOT_CONNECTED

####

the http-proxy in own case runs on port 8080, we have put in parameter gateway_host in this syntax: XXX.XXX.XXX.XXX 8080

Does not work.

may be a problem of rfc-destination and unicode?

saphttpa, saphttp or sapftp and sapftpa

on os in a dos-box ftp with proxy does not work. with sapftp on os i become a connect with following syntax

sapftp>

open XXX.XXX.XXX.XXX 8080

Connected to XXX.XXX.XXX.XXX Port 8080.

hm, why i become this result not in abap.

thx.

christoph

[Former Member]

hi wim,

the solution is in this dev_ftp tail:

[1992] connect request host : <proxy_host>, user : <user>@<ftp_host>

[1992] Connected to <proxy_host> Port 21.

- NI handle: 1

[1992] FTP server : 220 rev-proxy29 FTP server (Version 1.9.2.2 - 2004/03/30 10:42:46) ready.

[1992] ---> <user>@<ftp_host>

[1992] FTP server : 331 Password required

[1992] ---> *****

[1992] FTP server : 230 user logged in

[1992] ---> TYPE I

[1992] FTP server : 200 Type set to IMAGE.

thanks,

christoph in cooperation with andy

[Former Member]

Hi Christoph,

how do you get this output? What do you pass to the FM 'FTP_CONNECT' to get a connection?

lv_userid =

lv_pwd =

lv_rfcdst = 'SAPFTP'.

lv_host =

lv_rfcgwhost =

CALL FUNCTION 'FTP_CONNECT'

EXPORTING

user = lv_userid

password = lv_pwd

• ACCOUNT =

host = lv_host

rfc_destination = lv_rfcdst

• gateway_user =

• gateway_password =

gateway_host = lv_rfcgwhost

IMPORTING

handle = lv_handle

EXCEPTIONS

not_connected = 1

OTHERS = 2.

Thanks,

Hubert

[Former Member]

We were not able to solve this issue. So for specific external FTP-servers the authentication was removed from the proxy and then everything worked fine...

[Former Member]

ah ok - we have no authentication on the proxy - only authentication on ftp. do you know about sftp (ftp via ssh) - it will be supported from sapftp?

we have a http-proxy with ftp support - that is the right title.

thanks,

christoph

[franois_henrotte]

in my opinion, the proxy settings must be set directly in the destination

[Former Member]

Hello François,

I'm trying to access an FTP Server via a proxy server as well - but it doesn't seem to work.

I can connect to that FTP Server via the same proxy with FileZialla so I know the users and PWDs are working.

How can I provide the proxy information (host, user and PWD) within the RFC connection - or what do you mean by destination?

The FTP trace (run program RSFTP001) gives the following result:

 
trc file: "dev_ftp", trc level: 2, release: "700"

Tue Sep 27 10:37:26 2011
[7299248] sccsid:@(#) $Id: //bas/700_REL/src/krn/ftp/ftpmain.c#17 $ SAP
@(#) $Id: //bas/700_REL/src/krn/ftp/ftp.c#4 $ SAP
@(#) $Id: //bas/700_REL/src/krn/ftp/ftpcmd.c#4 $ SAP
sapftp.ini file path : /usr/sap/D2E/DVEBMGS10/exe/sapftp.ini
SAPFTP Passive mode set to = 0
[7299248] FTP Start : argc - 6 a0 - /usr/sap/D2E/DVEBMGS10/exe/sapftp
g56e sapgw10 74691815 CPIC_TRACE=2 IDX=1
[7299248] RFC Version 700
[7299248] Install server functions
[7299248] Call RfcAccept
[7299248] Enter RfcDispatch loop
[7299248] Partner codepage 4102
[7299248] connect request host : ftp.host.com , user : FTPUser
[7299248] gateway host : proxy.lan.net , user : ProxyUser
[7299248] Connected to proxy.lan.net Port 21.
- NI handle: 1
[7299248] FTP server : 220 Proxy FTP Service
[7299248]    > USER ProxyUser
[7299248] FTP server : 331 Enter password.
[7299248]    > *****
[7299248] FTP server : 530-User Access denied.
530-
530-Usage: USER username@proxyusername@hostname
530        PASS password@proxypassword
[7299248] FTP disconnect - NI handle : 1
[7299248]    > QUIT
[7299248] FTP server : 221 Service closing control connection.
[7299248] FTP Stop

In my coding I scrambled both PWDs with FM 'HTTP_SCRAMBLE' using key '26101957'.

I tried as well setting the parameter user to (using the scrambeld PWDs) but this gives the same resulst.

Here's a part of my code

REPORT  zz_test_ftp.


PARAMETERS: user(50) TYPE c LOWER CASE,
            pwd(60) TYPE c LOWER CASE,
            host(64) TYPE c LOWER CASE,


            gw_user(30) TYPE c LOWER CASE,
            gw_pwd(30) TYPE c LOWER CASE,
            gw_host(30) TYPE c LOWER CASE,

            cmd1(80) TYPE c LOWER CASE,
            cmd2(80) TYPE c LOWER CASE,
            cmd3(80) TYPE c LOWER CASE,
            dest LIKE rfcdes-rfcdest DEFAULT 'SAPFTPA',
            compress TYPE c DEFAULT 'N'.

DATA: hdl TYPE i,
      key TYPE i VALUE 26101957,
      slen TYPE i.

DATA: BEGIN OF result OCCURS 0,
      line(100) TYPE c,
      END OF result.

SET EXTENDED CHECK OFF.
slen = STRLEN( pwd ).
CALL FUNCTION 'HTTP_SCRAMBLE'
  EXPORTING
    SOURCE      = pwd
    sourcelen   = slen
    key         = key
  IMPORTING
    destination = pwd.

slen = STRLEN( gw_pwd ).
CALL FUNCTION 'HTTP_SCRAMBLE'
  EXPORTING
    SOURCE      = gw_pwd
    sourcelen   = slen
    key         = key
  IMPORTING
    destination = gw_pwd.

"concatenate user '@' gw_user '@' host into USER.
"concatenate pwd '@' gw_pwd into PWD.

CALL FUNCTION 'FTP_CONNECT'
  EXPORTING
    user             = user
    password         = pwd
    account          = user
    host             = host
    rfc_destination  = dest
    gateway_user     = gw_user
    gateway_password = gw_pwd
    gateway_host     = gw_host
  IMPORTING
    handle           = hdl.