[OpenSTA-devel] [ opensta-Bugs-1468855 ] 'LOAD RESPONSE_INFO' affected by subroutine order

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Bugs item #1468855, was opened at 2006-04-11 17:06
Message generated for change (Comment added) made by dansut
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Category: None
Group: None
>Status: Deleted
>Resolution: Duplicate
Priority: 5
Submitted By: John Arrowwood (jarrowwx)
Assigned to: Nobody/Anonymous (nobody)
Summary: 'LOAD RESPONSE_INFO' affected by subroutine order

Initial Comment:
This is similar to issues 433574 and 645735, and in
fact is explicitly mentioned in 433574, but is being
lost in the confusion because there are multiple bugs
being reported at once.  So, to try and help this issue
get some attention, here it is in a separate bug.

Regardless of whether you use PRIMARY GET URI or GET
URI or PRIMARY POST URI, the following applies:

If you perform the HTTP request in a subroutine, and
then try to LOAD Response_Info after the subroutine
finishes, or if you attempt to call a subroutine in
order to perform the LOAD, either way, it errors with
the familiar:

HTTPRESPONSE: No data available for connection id(1)
TScript::run: ERROR in TOF execution; resuming...

This appears to be an issue whether the connection ID
is a constant, an integer variable, or an expression. 
This is why I chose to raise a separate bug, since the
other two seem to be focused on the use of a variable
for the connection id.

The use of SYNCHRONIZE REQUESTS seems to be of no
value, whether performed in the calling subroutine, or
the called subroutine.

The wrapping of the call in an IF block also likewise
does not help.

It would seem to be a scope issue.  It seems like once
the scope of execution changes, the connection id is no
longer valid.

Here's hoping that helps narrow down the source of the
problem.  And if this could be fixed, it would enable
scripts to be much better organized and maintainable.

----------------------------------------------------------------------

>Comment By: Daniel Sutcliffe (dansut)
Date: 2006-07-13 15:50

Message:
Logged In: YES 
user_id=19748

Problem deleted as there is no specific problem 'lost in
confusion' here just a whole can of worms that needs
addressing as a single issue.  The mentioned 2 existing
problems have now been merged and bug#645735 should be
referenced for the status of problems in this area.

Please check this FAQ:
http://portal.opensta.org/faq.php?topic=NoDataForConnection

Also it should be noted that this report would never have
happend if the poster had followed the instruction: "Before
submitting any new problem here, please check the FAQ,
specifically the entry on reporting bugs" that is in bold
large letters at the top of the form to submit new bugs.

----------------------------------------------------------------------

Comment By: John Arrowwood (jarrowwx)
Date: 2006-04-13 14:25

Message:
Logged In: YES 
user_id=1500024

The following demonstrates the problem:
----- BEGIN -----
Environment
       description     ""
       mode            http
       wait unit       milliseconds

Definitions
       CHARACTER*255           server
       CHARACTER*255           path
       CHARACTER*65535         headers
       CHARACTER*65535         body_text

Code
       SET server = 'www.google.com'
       CALL Get [ '/' ]

SUBROUTINE DebugRequest

       LOAD Response_Info Header ON 1 INTO headers
       LOAD Response_Info Body ON 1 INTO body_text
       LOG headers
       LOG body_text

END SUBROUTINE

SUBROUTINE Get [ path ]

       PRIMARY GET URI "http://"+server+path+" HTTP/1.0" ON 1 &
               HEADER "Host: "+server &
               ,WITH { "User-Agent: testing" }

       CALL DebugRequest

END SUBROUTINE
----- END -----

The following DOES NOT demonstrate the problem.  Notice how
subtle the difference?

----- BEGIN -----
Environment
       description     ""
       mode            http
       wait unit       milliseconds

Definitions
       CHARACTER*255           server
       CHARACTER*255           path
       CHARACTER*65535         headers
       CHARACTER*65535         body_text

Code
       SET server = 'www.google.com'
       CALL Get [ '/' ]

SUBROUTINE Get [ path ]

       PRIMARY GET URI "http://"+server+path+" HTTP/1.0" ON 1 &
               HEADER "Host: "+server &
               ,WITH { "User-Agent: testing" }

       CALL DebugRequest

END SUBROUTINE

SUBROUTINE DebugRequest

       LOAD Response_Info Header ON 1 INTO headers
       LOAD Response_Info Body ON 1 INTO body_text
       LOG headers
       LOG body_text

END SUBROUTINE
----- END -----

The only difference is subroutine declaration order!

This ought to give the developers a great way to narrow down
what is going on.  And it may well be that fixing this will
fix some other subtle and hard to reproduce bugs, as well.

----------------------------------------------------------------------

Comment By: John Arrowwood (jarrowwx)
Date: 2006-04-13 13:55

Message:
Logged In: YES 
user_id=1500024

Sample code that reproduces the issue, that can be used to
debug the problem:

Environment
	description	""
	mode		http
	wait unit	milliseconds

Definitions
! HTTP Global Variables
	INTEGER				connection_id

	CHARACTER*255		server
	CHARACTER*255		path
	CHARACTER*255		referrer
	CHARACTER*65535		headers
	CHARACTER*1024		cookie_temp
	CHARACTER*1024		cookie_contents
	CHARACTER*1024		redirect
	CHARACTER*65535		body_text
	INTEGER				body_length_int
	CHARACTER*5			body_length_char     

	INTEGER				DEBUG
	CONSTANT			USER_AGENT = "Mozilla/4.0 (compatible; MSIE 6.0;
Windows NT 5.1; SV1; .NET CLR 1.1.4322)"

Code
	SET DEBUG = 1
	SET server = 'www.google.com'
	CALL Get [ '/' ]

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE NextConnection

	IF ( connection_id > 0 ) THEN
		DISCONNECT FROM connection_id
	ENDIF
	SET connection_id = connection_id + 1

END SUBROUTINE

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE CheckPath

	IF ( path <> redirect ) THEN
		IF ( redirect <> "" ) THEN
			LOG "Requesting: ", path
			LOG "Expecting: ", redirect
		ENDIF
	ENDIF

END SUBROUTINE 

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE DebugRequest

	IF ( DEBUG = 1 ) THEN

		LOAD Response_Info Header ON connection_id INTO headers 
		LOAD Response_Info Body ON connection_id INTO body_text
		LOG headers
		LOG body_text

	ENDIF

END SUBROUTINE

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE UpdateCookie

	LOAD Response_Info Header ON connection_id INTO
cookie_temp, WITH "Set-Cookie,PHPSESSID"

	IF ( cookie_temp <> "" ) THEN
		SET cookie_contents = cookie_temp
	ENDIF

END SUBROUTINE	

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE CheckRedirect

	LOAD Response_Info Header ON connection_id INTO redirect,
WITH "Location"
	IF ( redirect = "/system_errors/please_login.php" ) THEN
		LOG "!!!!! Oops !!!!!"
		EXIT
	ENDIF

END SUBROUTINE

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE Post [ path, body_text ]

	CALL CheckPath
	CALL NextConnection

	SET body_length_int = ~LENGTH( body_text )
	CONVERT body_length_int TO body_length_char

	LOG body_length_char
	LOG body_text

	PRIMARY POST URI "http://"+server+path+" HTTP/1.0" ON
connection_id &
		HEADER "Host: "+server &
		,WITH { &
			"User-Agent: "+USER_AGENT, &
			"Accept: image/gif, image/x-xbitmap, image/jpeg,
image/pjpeg, " &
				"application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, " &
				"application/x-shockwave-flash, */*", &
			"Referer: http://"+server+referrer, &
			"Accept-Language: en-us", &
			"Content-Type: application/x-www-form-urlencoded", &
			"Connection: Keep-Alive", &
			"Content-Length: " + body_length_char, &
			"Pragma: no-cache", &
			"Cookie: "+cookie_contents &
		} &
		,BODY body_text 

	CALL DebugRequest
	CALL CheckRedirect		
	SET  referrer = path

END SUBROUTINE

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE Get [ path ]

	CALL CheckPath
	CALL NextConnection

	PRIMARY GET URI "http://"+server+path+" HTTP/1.0" ON
connection_id &
		HEADER "Host: "+server &
		,WITH { &
			"User-Agent: "+USER_AGENT, &
			"Accept: image/gif, image/x-xbitmap, image/jpeg,
image/pjpeg, " &
				"application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, " &
				"application/x-shockwave-flash, */*", &
			"Referer: http://"+server+referrer, &
			"Accept-Language: en-us", &
			"Connection: Keep-Alive", &
			"Pragma: no-cache", &
			"Cookie: "+cookie_contents &
		} 

	CALL DebugRequest
	CALL CheckRedirect
	SET  referrer = path

END SUBROUTINE

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE RefersTo [ path ]

	CALL NextConnection

	GET URI "http://"+server+path+" HTTP/1.0" ON connection_id &
		HEADER "Host: "+server &
		,WITH { &
			"User-Agent: "+USER_AGENT, &
			"Accept: */*", &
			"Referer: http://"+server+referrer, &
			"Accept-Language: en-us", &
			"Connection: Keep-Alive", &
			"Cookie: "+cookie_contents &
		} 

END SUBROUTINE

----------------------------------------------------------------------

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