########################################################################
# Utility functions for CGI programs
#
# Set www.* record with the environment
#
# Parse GET/POST variables in HTTPvar array
#
# vread() function to read HTTPvar
#
# $Id: ahtmllib.4gl,v 1.2 2009/08/19 17:59:18 fortiz Exp $
#
########################################################################
###########
globals
###########
define
item,
form_method
char(20),
HTTP_POST_VAR,
HTTP_GET_VAR
char(1000),
www record
GATEWAY_INTERFACE char (20),
SERVER_NAME char (60),
SERVER_SOFTWARE char (100),
SERVER_PROTOCOL char (20),
REQUEST_METHOD char (10),
QUERY_STRING char (300),
DOCUMENT_ROOT char (200),
HTTP_ACCEPT char (200),
HTTP_ACCEPT_CHARSET char (40),
HTTP_ACCEPT_ENCODING char (20),
HTTP_ACCEPT_LANGUAGE char (10),
HTTP_CONNECTION char (20),
HTTP_HOST char (200),
HTTP_REFERER char (600),
HTTP_USER_AGENT char (300),
REMOTE_ADDR char (20),
REMOTE_PORT char (10),
SCRIPT_FILENAME char (300),
SERVER_ADMIN char (100),
SERVER_PORT char (10),
SERVER_SIGNATURE char (100),
PATH_TRANSLATED char (300),
SCRIPT_NAME char (300),
REQUEST_URI char (600)
end record,
HTTPvar array [100] of record
vname char(20),
value char(60)
end record
end globals
#==================== HTML Library ==========================
#######################
function html_init()
#######################
let form_method="POST"
call get_webserver_vars()
if www.REQUEST_METHOD = "POST"
then
call getstdin()
call html_params(HTTP_POST_VAR)
else
call html_params(HTTP_GET_VAR)
end if
end function
############################
function html_headers(what)
############################
define what varchar(100)
let what = what clipped
code
printf("Content-type: %s\n\n",what);
endcode
return
end function
###################################
function html_start_body()
###################################
display ""
end function
###################################
function html_end_body()
###################################
display ""
end function
###################################
function html_start_para()
###################################
display ""
end function
###################################
function html_end_para()
###################################
display "
"
end function
###################################
function html_display_para(mytext)
###################################
define mytext char (10000)
call html_start_para()
display mytext clipped
call html_end_para()
end function
###################################
function html_meta()
###################################
display ""
display ""
display ""
display ""
end function
###################################
function html_link(URL,target,mytext)
###################################
define
URL,mytext char (300),
target char(10)
display "",mytext clipped,""
end function
###################################
function html_head(page_title)
###################################
define page_title char (300)
display ""
display " "
call html_title(page_title)
call html_meta()
display ""
end function
###################################
function html_title(p_string)
###################################
define p_string char(512)
display "",p_string clipped,""
end function
###################################
function html_heading(p_string,p_level)
###################################
define p_string char(512)
define p_level integer
display "",p_string clipped,
""
end function
###################################
function html_hline()
###################################
display "
"
end function
###################################
function html_image(URL,W,H)
###################################
define
URL char (200),
W,H integer
display "![](",URL,")
"
end function
###################################
function html_start_center()
###################################
display ""
end function
###################################
function html_end_center()
###################################
display ""
end function
###################################
function html_params(allparams)
###################################
define
cnt,numparams,startpos,endpos,arglength, allparamslength,
gotit, i, varlen
smallint,
ARGUMENT
ARRAY[50] OF CHAR (60),
prg_name
char(20),
allparams, resto, cutstring
char (1000)
let prg_name = www.script_name
if length (allparams) = 0
then
return
end if
let numparams = 0
let startpos = 1
let allparamslength = length(allparams)
################################
FOR cnt = 1 TO length(allparams)
################################
if allparams[cnt] = "&"
then
let numparams = numparams + 1
let endpos = cnt - 1
let ARGUMENT[numparams] = allparams[startpos,endpos]
let startpos = cnt + 1
end if
#######
end for
#######
if startpos < allparamslength
then
let resto = allparams[startpos,allparamslength]
if length (resto) > 0 then
#last one don't have "&" on end
let numparams = numparams + 1
let endpos = length(allparams)
let ARGUMENT[numparams] = allparams[startpos,endpos]
end if
end if
############################
FOR cnt = 1 TO numparams
############################
let varlen=length(ARGUMENT[cnt])
let cutstring = ARGUMENT[cnt]
let gotit = false
##################
for i=1 to varlen
##################
if cutstring[i] = "="
then
let HTTPvar[cnt].vname = cutstring[1,i-1]
let HTTPvar[cnt].value = cutstring[i+1,varlen]
let gotit = true
exit for
end if
#######
end for
#######
if not gotit
then
let HTTPvar[cnt].vname = ARGUMENT[cnt]
let HTTPvar[cnt].value = ""
end if
let varlen=length(HTTPvar[cnt].value)
let cutstring = HTTPvar[cnt].value
##################
for i=1 to varlen
##################
#spaces are sent as "+"
if cutstring[i] = "+"
then
let cutstring = cutstring[1,i-1]," ",cutstring[i+1,varlen]
end if
#Netscape sends "@" as "%40"
if cutstring[i,i+2] = "%40"
then
let cutstring = cutstring[1,i-1],"@",cutstring[i+3,varlen]
end if
#######
end for
#######
let HTTPvar[cnt].value = cutstring
#######
END FOR
#######
let item = vread("item")
end function #params()
################################
function vread(varname)
################################
define cnt smallint, tmpvarname, varname char(60)
#all variable names in 4gl are case insensitive
let varname = upshift(varname)
####################
for cnt = 1 to 100
####################
let tmpvarname = upshift(HTTPvar[cnt].vname)
if tmpvarname = varname then
if length (HTTPvar[cnt].value) > 0 then
return HTTPvar[cnt].value
else
#varibale was defined, but no value was assigned
return TRUE
end if
end if
########
end for
########
#did not find this variable name:
return false
end function
#####################
function vreadall()
#####################
define cnt smallint
for cnt = 1 to 100
if length (HTTPvar[cnt].vname) > 0 then
display HTTPvar[cnt].vname clipped, " = ", HTTPvar[cnt].value clipped, "
"
else
exit for
end if
if length (HTTPvar[cnt].value) = 0 then #bug in DISPLAY
display "
"
end if
end for
end function
##############################
function get_webserver_vars()
##############################
let www.GATEWAY_INTERFACE = FGL_GETENV("GATEWAY_INTERFACE")
#What revision of the CGI specification the server is using; i.e. 'CGI/1.1'.
let www.SERVER_NAME = FGL_GETENV("SERVER_NAME")
#The name of the server host under which the current script is executing.
#If the script is running on a virtual host, this will be the value defined
#for that virtual host.
let www.SERVER_SOFTWARE = FGL_GETENV("SERVER_SOFTWARE")
#Server identification string, given in the headers when responding to requests.
let www.SERVER_PROTOCOL = FGL_GETENV("SERVER_PROTOCOL")
#Name and revision of the information protocol via which the page was
#requested; i.e. 'HTTP/1.0';
let www.REQUEST_METHOD = FGL_GETENV("REQUEST_METHOD")
#Which request method was used to access the page; i.e. 'GET', 'HEAD',
#'POST', 'PUT'.
let www.QUERY_STRING = FGL_GETENV("QUERY_STRING")
let HTTP_GET_VAR = FGL_GETENV("QUERY_STRING")
#The query string, if any, via which the page was accessed.
let www.DOCUMENT_ROOT = FGL_GETENV("DOCUMENT_ROOT")
#The document root directory under which the current script is executing,
#as defined in the server's configuration file.
let www.HTTP_ACCEPT = FGL_GETENV("HTTP_ACCEPT")
#Contents of the Accept: header from the current request, if there is one.
let www.HTTP_ACCEPT_CHARSET = FGL_GETENV("HTTP_ACCEPT_CHARSET")
#Contents of the Accept-Charset: header from the current request, if
#there is one. Example: 'iso-8859-1,*,utf-8'.
let www.HTTP_ACCEPT_ENCODING = FGL_GETENV("HTTP_ACCEPT_ENCODING")
#Contents of the Accept-Encoding: header from the current request, if
#there is one. Example: 'gzip'.
let www.HTTP_ACCEPT_LANGUAGE = FGL_GETENV("HTTP_ACCEPT_LANGUAGE")
#Contents of the Accept-Language: header from the current request, if
#there is one. Example: 'en'.
let www.HTTP_CONNECTION = FGL_GETENV("HTTP_CONNECTION")
#Contents of the Connection: header from the current request, if
#there is one. Example: 'Keep-Alive'.
let www.HTTP_HOST = FGL_GETENV("HTTP_HOST")
#Contents of the Host: header from the current request, if there is one.
let www.HTTP_REFERER = FGL_GETENV("HTTP_REFERER")
#The address of the page (if any) which referred the browser to the
#current page. This is set by the user's browser; not all browsers will set this.
let www.HTTP_USER_AGENT = FGL_GETENV("HTTP_USER_AGENT")
#Contents of the User_Agent: header from the current request, if there
#is one. This is a string denoting the browser software being used to
#view the current page; i.e. Mozilla/4.5 [en] (X11; U; Linux 2.2.9 i586).
#Among other things, you can use this value with get_browser() to tailor
#your page's functionality to the capabilities of the user's browser.
let www.REMOTE_ADDR = FGL_GETENV("REMOTE_ADDR")
#The IP address from which the user is viewing the current page.
let www.REMOTE_PORT = FGL_GETENV("REMOTE_PORT")
#The port being used on the user's machine to communicate with the web
#server.
let www.SCRIPT_FILENAME = FGL_GETENV("SCRIPT_FILENAME")
#The absolute pathname of the currently executing script.
let www.SERVER_ADMIN = FGL_GETENV("SERVER_ADMIN")
#The value given to the SERVER_ADMIN (for Apache) directive in the web
#server configuration file. If the script is running on a virtual host,
#this will be the value defined for that virtual host.
let www.SERVER_PORT = FGL_GETENV("SERVER_PORT")
#The port on the server machine being used by the web server for
#communication. For default setups, this will be '80'; using SSL,
#for instance, will change this to whatever your defined secure HTTP port is.
let www.SERVER_SIGNATURE = FGL_GETENV("SERVER_SIGNATURE")
#String containing the server version and virtual host name which are
#added to server-generated pages, if enabled.
let www.PATH_TRANSLATED = FGL_GETENV("PATH_TRANSLATED")
#Filesystem- (not document root-) based path to the current script,
#after the server has done any virtual-to-real mapping.
let www.SCRIPT_NAME = FGL_GETENV("SCRIPT_NAME")
#Contains the current script's path. This is useful for pages which
#need to point to themselves.
let www.REQUEST_URI = FGL_GETENV("REQUEST_URI")
#The URI which was given in order to access this page; for instance,
#'/index.html'.
end function
##############################
function show_webserver_vars()
##############################
display "HTTP_POST_VAR=[",HTTP_POST_VAR clipped, "]"
display "
HTTP_GET_VAR=[",HTTP_GET_VAR clipped,"]"
display "
"
display "
"
display "All www variables:
"
display "GATEWAY_INTERFACE = ",www.GATEWAY_INTERFACE,"
"
display "SERVER_NAME = ",www.SERVER_NAME,"
"
display "SERVER_SOFTWARE = ",www.SERVER_SOFTWARE,"
"
display "SERVER_PROTOCOL = ",www.SERVER_PROTOCOL,"
"
display "REQUEST_METHOD = ",www.REQUEST_METHOD,"
"
display "QUERY_STRING = ",www.QUERY_STRING,"
"
display "DOCUMENT_ROOT = ",www.DOCUMENT_ROOT,"
"
display "HTTP_ACCEPT = ",www.HTTP_ACCEPT,"
"
display "HTTP_ACCEPT_CHARSET = ",www.HTTP_ACCEPT_CHARSET,"
"
display "xxx
"
display "HTTP_ACCEPT_ENCODING = ",www.HTTP_ACCEPT_ENCODING,"
"
display "HTTP_ACCEPT_LANGUAGE = ",www.HTTP_ACCEPT_LANGUAGE,"
"
display "HTTP_CONNECTION = ",www.HTTP_CONNECTION,"
"
display "HTTP_HOST = ",www.HTTP_HOST,"
"
display "xxx
"
display "HTTP_REFERER = ",www.HTTP_REFERER,"
"
display "HTTP_USER_AGENT = ",www.HTTP_USER_AGENT,"
"
display "REMOTE_ADDR = ",www.REMOTE_ADDR,"
"
display "REMOTE_PORT = ",www.REMOTE_PORT,"
"
display "SCRIPT_FILENAME = ",www.SCRIPT_FILENAME,"
"
display "SERVER_ADMIN = ",www.SERVER_ADMIN,"
"
display "SERVER_PORT = ",www.SERVER_PORT,"
"
display "SERVER_SIGNATURE = ",www.SERVER_SIGNATURE,"
"
display "PATH_TRANSLATED = ",www.PATH_TRANSLATED,"
"
display "xxx
"
display "SCRIPT_NAME = ",www.SCRIPT_NAME,"
"
display "REQUEST_URI = ",www.REQUEST_URI,"
"
display "
"
end function
####################################
function show_webserver_vars_page()
####################################
call html_start_body()
call page_menu()
call show_webserver_vars()
call standard_footer()
call html_end_body()
end function
######################################################################
# This have a variable number of parameters
# so we'll have to pop them off in C
# NOTE: List is in reverse order - thats the order they will be pulled
# off the stack..
######################################################################
code
aclfgl_html_list(int a) {
int c;
char s[1000];
for (c=0;c%s\n",s,c,a);
}
return 0;
}
endcode
######################################################################
#####################
function getstdin()
#####################
define
charvar char (1000),
len smallint
if www.REQUEST_METHOD <> "POST"
then
initialize HTTP_POST_VAR to null
return
end if
code
{
fgets (charvar, sizeof (charvar), stdin);
trim (charvar);
}
endcode
let HTTP_POST_VAR = charvar clipped
end function
#############################
function html_redirect(URL)
#############################
define
URL char (300)
display ''
display ''
display ''
display 'End program'
display ''
display ''
call html_end_body()
display ''
exit program
end function
#--------------------------- EOF --------------------------------