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Notice how the query parameters in the input URL are decoded and become
elements of the ::wapp dict. The same thing occurs with POST parameters
and cookies - they are all converted into entries in the ::wapp dict
variable so that the parameters are easily accessible to page generation
procedures.
The ::wapp variable contains additional information about the request,
The ::wapp dict contains additional information about the request,
roughly corresponding to CGI environment variables. To prevent environment
information from overlapping and overwriting query parameters, all the
environment information uses upper-case names and all query parameters
are required to be lower case. If an input URL contains an upper-case
query parameter (or POST parameter or cookie), that parameter is silently
omitted from the ::wapp variable
omitted from the ::wapp varidict.
The ::wapp variable contains the following environment values:
The ::wapp dict contains the following environment values:
+ **HTTP\_HOST**
The hostname (or IP address) and port that the client used to create
the current HTTP request. This is the first part of the request URL.
the current HTTP request. This is the first part of the request URL,
right after the "http://" or "https://". The format for this value
is "HOST:PORT". Examples: "sqlite.org:80" or "127.0.0.1:32172".
+ **HTTP\_USER\_AGENT**
The name of the web-browser or other client program that generated
the current HTTP request.
+ **HTTP\_COOKIE**
The values of all cookies in the HTTP header
+ **HTTPS**
If the HTTP request arrived of SSL, then this variable has the value "on".
For an unencrypted request, the variable does not exist.
If the HTTP request arrived of SSL (via "https://"), then this variable
has the value "on". For an unencrypted request ("http://"), this
variable does not exist.
+ **REMOTE\_ADDR**
The IP address and port from which the HTTP request originated.
The IP address from which the HTTP request originated.
+ **REMOTE\_PORT**
The TCP port from which teh HTTP request originated.
+ **SCRIPT_NAME**
In CGI mode, this is the name of the CGI script in the URL. In other
words, this is the initial part of the URL path that identifies the
CGI script. For other modes, this variable is an empty string.
+ **PATH\_INFO**
The part of the URL path that follows the SCRIPT\_NAME. For all modes
other than CGI, this is exactly the URL pathname, though with the
query parameters removed. PATH_INFO begins with a "/"
query parameters removed. PATH_INFO begins with a "/".
+ **REQUEST\_URI**
The URL for the inbound request, without the initial "http://" or
"https://" and without the HTTP\_HOST. This variable is the same as
the concatenation of $SCRIPT\_NAME and $PATH\_INFO.
+ **REQUEST\_METHOD**
"GET" or "HEAD" or "POST"
* **CONTENT\_LENGTH**
The number of bytes of POST data.
* **CONTENT\_TYPE**
The mimetype of the POST data. Usually this is
application/x-www-form-urlencoded.
All of the above are standard CGI environment values.
The following are additional values add by Wapp:
* **CONTENT**
The raw POST data text.
+ **BASE\_URL**
The text of the request URL through the SCRIPT\_NAME. This value can
be prepended to hyperlinks to ensure that the correct page is reached by
those hyperlinks.
+ **PATH\_HEAD**
The first element in the PATH\_INFO. The value of PATH\_HEAD is used to
select one of the "wapp-page-XXXXX" commands to run in order to generate
the output web page.
+ **PATH\_TAIL**
All of PATH\_INFO that follows PATH\_HEAD.
+ **SELF\_URL**
The URL for the current page, stripped of query parameter. This is
useful for filling in the action= attribute of forms.
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