Brian,
I took a look at writing some proxy code as well but I started with the
authentication to the proxy, rather than passing the proxy URL and
port. What proxy are you using this code with? Have you looked at any
proxy authentication schemes at all?
Pete Helgren
Brian Doherty wrote:
Hello Scott etc.
I have done some work on getting
through
our proxy, although I'm not sure the changes are good enough to
implement
into the open source as they stand. I'm not used to writing code for
this
kind of development.
This is what I did. Feel free to
slap
my wrists. There may be enough information for someone to get it going
and implement the code better in to the product. This code gets through
our proxy though.
Created a new HTTPPROXYH Header
Source
file member.
DHTTP_PROXYNAME S
256A
D
INZ('YOUR.PROXY.HERE.COM')
DHTTP_PROXYPORT S
4A
D
INZ('8080')
DProxy_Name S
256A
D
DProxy_Port S
4A
D
D @proxy
s 1N
inz(*on)
D @noproxy s
1N
inz(*off)
*********************************************************************
* http_Proxy(): Set Proxy
server
*
* UseProxy
= (input) (either *ON=Yes or *OFF=No)
*
* pxName
= (Input/Output) Current Proxy Name
* pxPort
= (Input/Output) Current Proxy Port
D http_proxy PR
10i 0
D UseProxy
1N const
D pxName
256A varying const
options(*nopass)
D pxName
256A varying const
options(*nopass)
D pxPort
4A varying
const options(*nopass)
Created a new HTTPPROXY module.
*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
* http_Proxy(): Set the
Proxy server Name
*
* UseProxy
= (input) (either *ON=Yes or *OFF=No)
*
* pxName
= (Input/Output) Current Proxy Name
* pxPort
= (Input/Output) Current Proxy Port
*
*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
P http_proxy B
export
D http_proxy PI
10I 0
D UseProxy
1N const
D pxName
256A varying const
options(*nopass)
D pxPort
4A varying
const options(*nopass)
D wkProxy
S 1N
c
eval wkProxy = UseProxy
c
if wkProxy
c
if %parms >=
2
c
eval proxy_name
= pxName
c
else
c
eval proxy_name
= HTTP_PROXYNAME
c
endif
c
if %parms >=
3
c
eval Proxy_Port
= pxPort
c
else
c
eval Proxy_Port =
HTTP_PROXYPORT
c
endif
c
else
c
eval Proxy_Name
= *blanks
c
eval Proxy_Port
= *blanks
c
endif
c
return 0
P
E
So far so good, but now it probably
gets a bit dangerous . . .
Then I added some code to the
delivered
HTTPAPIR4
After
/copy LIBHTTP/QRPGLESRC,COMM_H
I added
/copy LIBHTTP/QRPGLESRC,HTTPPROXYH.
Changed the http_persist_open
procedure.
(Inserted lines in italics )
*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
* http_persist_open():
Open a persistent HTTP session
*
* peURL
= url to connect to
* peTimeout = (optional)
give up if no data is received for
*
this many seconds.
*
* Returns *NULL upon failure,
or
*
pointer to HTTP communication session
*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
P http_persist_open...
P
B
export
D http_persist_open...
D
PI *
D peURL
32767A varying
const options(*varsize)
D peTimeout
10I 0 value options(*nopass)
D wwTimeout S
10I 0
D wwServ
S 32A
D wwUser
S 32A
D wwPass
S 32A
D wwHost
S 256A
D wwPort
S 10I 0
D wwPath
S 32767A varying
D wwComm
s *
D p_addr
s *
c
callp debug_msg('http_persist_open():'
c
+ ' entered')
*******************f*************************************
* Set up optional parameters
(timeout)
*********************************************************
c
if %parms>=2
and peTimeout>=0
c
eval wwTimeout = peTimeout
c
else
c
eval wwTimeout = HTTP_TIMEOUT
c
endif
*********************************************************
* Parse URL into it's components
*********************************************************
c
if http_long_ParseURL(peURL:
wwServ: wwUser:
c
wwPass:
wwHost: wwPort: wwPath) < 0
c
return *NULL
c
endif
*********************************************************
* Select comm driver &
build a socket address structure
*********************************************************
* Now change the host to a
proxy if we need to use one,
* and change the pathname
back to the full URL
c
if Proxy_Name
<> *blanks
c
eval wwHost = Proxy_Name
c
eval wwPath = %trim(peURL)
c
endif
c
if Proxy_Port
<> *BLANKS
c
eval wwPORT = atoi(%trimr(Proxy_Port))
c
endif
*
c
eval wwComm = http_select_commdriver(wwServ)
c
if wwComm = *NULL
c
return *NULL
c
endif
c
eval p_addr = comm_resolve(
wwComm
c
:
%trimr(wwHost)
c
:
%trimr(wwServ)
c
:
wwPort
c
:
*OFF )
c
if p_addr
= *NULL
c
return *NULL
c
endif
*********************************************************
* Connect to server
*********************************************************
c
if comm_Connect(
wwComm
c
: p_addr
c
: wwTimeout
c
) = *OFF
c
return *NULL
c
endif
c
return wwComm
P
E
Then I added (not sure why I did
this, but it looks like I just embedded the source instead of using the
external module for HTTPPROXY.
/copy LIBHTTP/QRPGLESRC,httpproxy
before the line
/define ERRNO_LOAD_PROCEDURE
I changed the qsrvsrc member
httpapi2
to include the line
EXPORT SYMBOL(HTTP_PROXY)
I compiled the module HTTPPROXY and
recompiled the service program HTTPAPIR4.
Finally, whenever you want to use go
through a proxy server add a line such as this before you start the
serious
stuff.
rc = http_proxy(@proxy);
or
rc = http_proxy(@proxy : myproxy:
myport);
If you don't want to use a proxy, do
nothing or
rc = Http_proxy(@noproxy)
Brian Doherty
CDTV-L - Senior Analyst
Handelsbanken London
___________________________________
----- Forwarded by
Brian
Doherty/BRDO01/SHB on 26/04/2006 16:21 -----
Scott,
Like I said I am not changing the example program that
you gave. So the URL spelling should not be issue. But DNS , whats that
,should that be configured in my iSeries
if so how and where should I do it. Please assist.
Thanks,
Prithiviraj.D
Scott Klement <sk@xxxxxxxxxxxxxxxx> wrote:
Sender: Scott Klement
> I downloaded , installed and tried the examples of HTTPAPI. When I
Ran
> EXAMPLE18 , the HTTP_URL_POST_XML Returns(-1) stating "Host not
found"
> I have my HTTP server ADMIN instances running. what can be the
issue
?
It's attempting to do a DNS lookup for the host name that you provided
in
your URL. It's not able to find the host.
Is DNS configured properly on your system?
Have you double-checked that you spelled the host name correctly in the
URL?
This has nothing whatsoever to do with your iSeries HTTP server or it's
admin instance. There's absolutely no relationship between those and
HTTPAPI.
> Input: Our AS400 is connected to a LAN and the LAN is inside a
firewall
> and we have a proxy server and port configured for getting to
internet,
> will it impact. If so what should I do to get this fixed.
I know that there are people who have worked on proxy support in the
past,
but as far as I know, nobody has implemented it. For certain, nobody
has
contributed changes back to the project to allow proxy support.
So, at least for the time being, HTTPAPI doesn't work with proxies. You
need a direct internet connection, or you'll need to modify HTTPAPI to
make it work.
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