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EWF/doc/workbook/handling_request/form/post/application.e

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note
description : "Reading Parameters from a HTML FORM (method POST) "
date : "$Date$"
revision : "$Revision$"
class
APPLICATION
inherit
WSF_DEFAULT_SERVICE
redefine
initialize
end
create
make_and_launch
feature {NONE} -- Initialization
initialize
-- Initialize current service.
do
set_service_option ("port", 9090)
end
feature -- Basic operations
execute (req: WSF_REQUEST; res: WSF_RESPONSE)
-- Execute the incomming request
local
file: WSF_FILE_RESPONSE
l_parameter_names: STRING
l_answer: STRING
idioms: LIST[STRING]
l_raw_data: STRING
do
if req.is_get_request_method then
create file.make_html ("form.html")
res.send (file)
elseif req.is_post_request_method then
req.set_raw_input_data_recorded (True)
-- (3) Read Raw Data
create l_raw_data.make_empty
req.read_input_data_into (l_raw_data)
-- (1) the parameter is case sensitive
if not (attached req.form_parameter ("GIVEN-NAME")) then
-- Wrong `GIVEN-NAME' need to be in lower case.
end
-- (2) Multiple values
if attached {WSF_MULTIPLE_STRING} req.form_parameter ("languages") as l_languages then
-- Get all the associated values
create {ARRAYED_LIST[STRING]} idioms.make (2)
across l_languages as ic loop idioms.force (ic.item.value) end
elseif attached {WSF_STRING} req.form_parameter ("langauges") as l_language then
-- Single value
print (l_language.value)
else
-- Value Missing
end
-- Read the all parameters names and his values.
create l_parameter_names.make_from_string ("<h2>Parameters Names</h2>")
l_parameter_names.append ("<br>")
create l_answer.make_from_string ("<h2>Parameter Names and Values</h2>")
l_answer.append ("<br>")
across req.form_parameters as ic loop
l_parameter_names.append (ic.item.key)
l_parameter_names.append ("<br>")
l_answer.append (ic.item.key)
l_answer.append_character ('=')
if attached {WSF_STRING} req.form_parameter (ic.item.key) as l_value then
l_answer.append_string (l_value.value)
end
l_answer.append ("<br>")
end
l_parameter_names.append ("<br>")
l_parameter_names.append_string (l_answer)
l_parameter_names.append ("<br>")
l_parameter_names.append ("<h2>Raw content</h2>")
l_parameter_names.append (l_raw_data)
res.put_header ({HTTP_STATUS_CODE}.ok, <<["Content-Type", "text/html"], ["Content-Length", l_parameter_names.count.out]>>)
res.put_string (l_parameter_names)
else
-- Here we should handle unexpected errors.
end
end
end