How do I convert from a Mechanize::File object to a Mechanize::Page object?

问题

I have a page that logs into a form. After logging in there are a few redirects. The first one looks like this:

#<Mechanize::File:0x1f4ff23 @filename="MYL.html", @code="200", @response={"cache-control"=>"no-cache=\"set-cookie\"", "content-length"=>"114", "set-cookie"=>"JSESSIONID=GdJnPVnhtN91KZfQPc3QzM1NLCyWDsnyvpGg8LL0Knnz3RgqxLFs!1803804592!-2134626567; path=/; secure, COOKIE_TEST=Aslyn; secure", "x-powered-by"=>"Servlet/2.4 JSP/2.0"}, @body="\r\n<html>\r\n  <head>\r\n    <meta http-equiv=\"refresh\" content=\"0;URL=MYL?Select=OK&StateName=38\">\r\n  </head>\r\n</html>", @uri=#<URI::HTTPS:0x16e1eff URL:https://www.manageyourloans.com/MYL?StateName=global_CALMLandingPage&GUID=D1704621-1994-E076-460A-10B2B682B960>>

so when I do a page.class here I get

Mechanize::File

How do I convert that to a Mechanize::Page?

@pguardiario

To better explain I have the code in my original message is stored in page.

When I do page.class I get Mechanize::File

So then I excute your code above:

agent = Mechanize.new
agent.post_connect_hooks << lambda {|http| http[:response].content_type = 'text/html'}

So I do this: agent.get(page.uri.to_s) or event try with any url agent.get("https://www.manageyourloans.com/MYL") I get an error: ArgumentError: wrong number of arguments (4 for 1)

I've even tried this:

agent = Mechanize.new { |a|
  a.post_connect_hooks << lambda { |_,_,response,_|
    if response.content_type.nil? || response.content_type.empty?
      response.content_type = 'text/html'
    end
  }
}

My question is once I do this, how do I convert the previous page into a Mechanize::Page?

回答1:

You can convert from a Mechanize::File to a Mechanize::Page by taking the body contained in the file object and passing that in as the body of a new page:

irb(main):001:0> require 'mechanize'
true
irb(main):002:0> file = Mechanize::File.new(URI.parse('http://foo.com'),nil,File.read('foo.html'))
#<Mechanize::File:0x100ef0190
    @full_path = false,
    attr_accessor :body = "<html><body>foo</body></html>\n",
    attr_accessor :code = nil,
    attr_accessor :filename = "index.html",
    attr_accessor :response = {},
    attr_accessor :uri = #<URI::HTTP:0x100ef02d0
        attr_accessor :fragment = nil,
        attr_accessor :host = "foo.com",
        attr_accessor :opaque = nil,
        attr_accessor :password = nil,
        attr_accessor :path = "",
        attr_accessor :port = 80,
        attr_accessor :query = nil,
        attr_accessor :registry = nil,
        attr_accessor :scheme = "http",
        attr_accessor :user = nil,
        attr_reader :parser = nil
    >
>

First, I created a fake Mechanize::File object just to have one for the example code to follow. You can see the content of the file it read in the :body.

Mechanize creates a Mechanize::File object when it can't figure out what the true content-type is.

irb(main):003:0> page = Mechanize::Page.new(URI.parse('http://foo.com'),nil,file.body)
#<Mechanize::Page:0x100ed5e30
    @full_path = false,
    @meta_content_type = nil,
    attr_accessor :body = "<html><body>foo</body></html>\n",
    attr_accessor :code = nil,
    attr_accessor :encoding = nil,
    attr_accessor :filename = "index.html",
    attr_accessor :mech = nil,
    attr_accessor :response = {
        "content-type" => "text/html"
    },
    attr_accessor :uri = #<URI::HTTP:0x100ed5ed0
        attr_accessor :fragment = nil,
        attr_accessor :host = "foo.com",
        attr_accessor :opaque = nil,
        attr_accessor :password = nil,
        attr_accessor :path = "",
        attr_accessor :port = 80,
        attr_accessor :query = nil,
        attr_accessor :registry = nil,
        attr_accessor :scheme = "http",
        attr_accessor :user = nil,
        attr_reader :parser = nil
    >,
    attr_reader :bases = nil,
    attr_reader :encodings = [
        [0] nil,
        [1] "US-ASCII"
    ],
    attr_reader :forms = nil,
    attr_reader :frames = nil,
    attr_reader :iframes = nil,
    attr_reader :labels = nil,
    attr_reader :labels_hash = nil,
    attr_reader :links = nil,
    attr_reader :meta_refresh = nil,
    attr_reader :parser = nil,
    attr_reader :title = nil
>
irb(main):004:0> page.class
Mechanize::Page < Mechanize::File

Just pass in the body of the file object and let Mechanize convert to what you know it should be.

回答2:

I like @The Tin Man's answer but it might be simpler to force the content type of the response:

agent.post_connect_hooks << lambda {|http| http[:response].content_type = 'text/html'}

来源：https://stackoverflow.com/questions/10286700/how-do-i-convert-from-a-mechanizefile-object-to-a-mechanizepage-object

标签

ruby-on-rails

ruby

ruby-on-rails-3

mechanize-ruby