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require 'htree'
require 'web/escape'
module Web
class Agent
class Forms
include Enumerable
def initialize(html)
@forms = []
parse(html)
end
attr_reader :forms
def each
@forms.each {|form|
yield form
}
end
def parse(html)
form = nil
doc = HTree.parse(html)
doc.traverse_with_path {|elem,path|
next unless path=~/\/form\z/
@forms << Form.new(elem)
}
end
class Form
def initialize(elem)
@method = (elem.get_attr('method') || 'GET').upcase
@action = elem.get_attr('action')
@enctype = elem.get_attr('enctype') || 'application/x-www-form-urlencoded'
@fields = []
parse(elem)
end
attr_accessor :method, :action, :enctype, :fields
def parse(elem)
elem.traverse_element {|e|
case e.qualified_name
when "input"
field = input(e)
@fields << field if field
when "textarea"
@fields << textarea(e)
when "select"
@fields << select(e)
end
}
end
def input(elem)
type = elem.get_attr("type")
name = elem.get_attr('name')
value = elem.get_attr('value')
case type
when 'hidden'
Hidden.new(name, value)
when 'password'
Password.new(name, value)
when 'checkbox'
checked = elem.get_attr('value')=~/checked/i
Checkbox.new(name, value, checked)
when 'radio'
checked = elem.get_attr('value')=~/checked/i
Radio.new(name, value, checked)
when 'submit'
Submit.new(name, value)
when 'file'
File.new(name)
when 'hidden'
Hidden.new(name, value)
when 'image'
Image.new(name, value)
when 'reset'
nil
else
Text.new(name, value)
end
end
def textarea(elem)
name = elem.get_attr('name')
text = ''
elem.each_child {|c|
text << Web::unescapeHTML(c.raw_string)
}
Textarea.new(name, text)
end
def select(elem)
name = elem.get_attr('name')
multiple = elem.get_attr('multiple')=~/multiple/i ? true : false
options = []
field = Select.new(name, multiple, [])
elem.each_child {|c|
if c.is_a?(HTree::Elem) && c.qualified_name=='option'
value = c.get_attr('value')
selected = c.get_attr('selected') =~ /selected/i ? true : false
field.options << Select::Option.new(value, selected)
end
}
field
end
def submit(agent)
uri = agent.uri + @action
agent.req.header['content-type'] = @enctype
agent.req.form.clear
if @method=='POST'
@fields.each {|field|
case field
when Text
agent.req.form.add field.name, field.value
when Password
agent.req.form.add field.name, field.value
when Checkbox
agent.req.form.add field.name, field.value if field.checked
when Radio
agent.req.form.add field.name, field.value if field.checked
when Submit
agent.req.form.add field.name, field.value
when File
filedata = Web::Common::FileData.new(field.name,'application/octet-stream')
filedata.path = field.path
agent.req.form.add field.name, filedata
when Hidden
agent.req.form.add field.name, field.value
when Image
agent.req.form.add field.name, field.value
when Textarea
agent.req.form.add field.name, field.text
when Select
field.options.each {|o|
if o.checked
agent.req.form.add field.name, o.value
end
}
end
}
agent.post(uri)
else
agent.set_uri(uri)
@fields.each {|field|
case field
when Text
agent.req.query.add field.name, field.value
when Password
agent.req.query.add field.name, field.value
when Checkbox
agent.req.query.add field.name, field.value if field.checked
when Radio
agent.req.query.add field.name, field.value if field.checked
when Submit
agent.req.query.add field.name, field.value
when File
filedata = Web::Common::FileData.new(field.name,'application/octet-stream')
filedata.path = field.path
agent.req.query.add field.name, filedata
when Hidden
agent.req.query.add field.name, field.value
when Image
agent.req.query.add field.name, field.value
when Textarea
agent.req.query.add field.name, field.text
when Select
field.options.each {|o|
if o.checked
agent.req.query.add field.name, o.value
end
}
end
}
agent.get(agent.uri.to_s)
end
end
class Text
def initialize(name,value)
@name = name
@value = value
end
attr_accessor :name, :value
end
class Password
def initialize(name,value)
@name = name
@value = value
end
attr_accessor :name, :value
end
class Checkbox
def initialize(name, value, checked)
@name = name
@value = value
@checked = checked
end
attr_accessor :name, :value, :checked
end
class Radio
def initialize(name, value, checked)
@name = name
@value = value
@checked = checked
end
attr_accessor :name, :value
end
class Submit
def initialize(name,value)
@name = name
@value = value
end
attr_accessor :name, :value
end
class File
def initialize(name,path=nil)
@name = name
@path = nil
end
attr_accessor :name, :path
end
class Hidden
def initialize(name,value)
@name = name
@value = value
end
attr_accessor :name, :value
end
class Image
def initialize(name,value)
@name = name
@value = value
end
attr_accessor :name, :value
end
class Textarea
def initialize(name, text='')
@name = name
@text = text
end
attr_accessor :name,:text
end
class Select
def initialize(name, multiple=false, options=[])
@name = name
@multiple = multiple
@options = options
end
attr_accessor :name, :multiple, :options
class Option
def initialize(value, selected)
@value = value
@selected = selected
end
end
end
end # Form
end # Forms
end # Agent
end # Web
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