http(n) Tnm Tcl Extension http(n)_________________________________________________________________NAMEhttp - Send and process HTTP requests.
_________________________________________________________________DESCRIPTION
The Hypertext Transfer Protocol (HTTP) (RFC 1945) is a
client/server protocol used to retrieve documents in the
World Wide Web. Documents are addressed using Uniform
Resource Locators (URL) (RFC 1738). The http command
allows to implement HTTP clients and a simple HTTP server.
HTTP COMMAND
The following list of http commands is useful for HTTP
clients:
http proxy [url]
The http proxy command allows to define a proxy
HTTP server which will be used in subsequent client
commands. Using this command without an url argu-
ment will return the URL to the currently used
proxy or an empty string. Providing a url argument
sets the proxy server. Setting the proxy to an
empty string turns the proxy feature off.
http head url
The http head command retrieves the HTTP header for
the document located at url. The header is returned
as a list of keys and values which can be converted
into a Tcl array using the array set command.
http get url fileName
The http get command retrieves the document located
at url. The body of the document is written to the
file named fileName. The command returns the HTTP
header as described for the http head command
above.
http post url docFileName fileName
The http post command posts the document in doc-
FileName to the location url. The body of the
returned document is written to the file named
fileName. The command returns the HTTP header as
described for the http head command above.
http put url docFileName
The http put command puts the document in docFile-
Name to the location url. The command returns the
HTTP header as described for the http head command
above.
Tnm 1
http(n) Tnm Tcl Extension http(n)http delete url
The http delete command deletes the document at the
location defined by url. The command returns HTTP
status information.
The following set of http commands is useful for a simple
HTTP server:
http server [port]
The http server command starts a simple HTTP server
listening on port port. If called without a port
argument, the currently used port number or an
empty string is returned. An empty string indicates
that no server is currently active.
http mime type extension
The http mime command is used to add mime type def-
initions to the internal table which maps file name
extension to mime types. If called without an argu-
ment, the list of all mime type mappings is
returned. A new mapping is created by supplying a
mime type and the file name extension.
http bind pattern method [script]
The http bind command binds a Tcl script to the
invocation of a HTTP method where the URL matches
pattern. Whenever a HTTP request of type method is
received that matches the pattern, script is evalu-
ated. The return value of the script must be a name
of a file which will be send back to the client.
Errors during the evaluation of the script will
result in an error response.
The following % sequences are substituted before a
script bound to a URL is evaluated:
%A The network address of the client.
%P The URL path requested by the client.
%S The search path contained in the URL path.
SEE ALSOscotty(1), Tnm(n), Tcl(n)AUTHORS
Juergen Schoenwaelder <schoenw@cs.utwente.nl>
Tnm 2
