Module: ImageVenue::NetHttpPostExtensions::InstanceMethods

Defined in:
lib/image_venue/net_http_post_extensions.rb

Instance Method Summary collapse

Instance Method Details

#set_multipart_data(files_params, other_params = {}, boundary1 = 'paranguaricutirimirruaru0xdeadbeef', boundary2 = 'paranguaricutirimirruaru0x20132') ⇒ Object

Similar to Net::HTTP::Post#set_form_data (in Ruby’s stardard library), but set up file upload parameters using the appropriate HTTP/HTML Forms multipart format.

Arguments

files_params

A hash of file upload parameters. The keys are parameter names, and the values are Net::HTTP::FileForPost instances. See that class documentation for more info about how POST file upload works.

other_params

A hash of => value pairs for the regular POST parameters, just like in set_form_data. Don’t mix set_form_data and set_multipart_data; they’ll overwrite each other’s work.

boundary1, boundary2

A couple of strings which doesn’t occur in your files. Boundary2 is only needed if you’re using the multipart/mixed technique. The defaults should be OK for most cases.

Examples

Simplest case (single-parameter single-file), complete:

require 'net/http'
require 'net_http_post_extensions'

req = Net::HTTP::Post.new('/scripts/upload.rb')
req.basic_auth('jack', 'inflamed sense of rejection')

file = Net::HTTP::FileForPost.new('/body/yourlife.txt', 'text/plain')
req.set_multipart_data({:poem => file},

                       {:author => 'jack',
                         :user_agent => 'soapfactory'})

res = Net::HTTP.new(url.host, url.port).start do |http|
  http.request(req)
end

Convoluted example:

pic1 = Net::HTTP::FileForPost.new('pic1.jpeg', 'image/jpeg')
pic2 = Net::HTTP::FileForPost.new(pic2_io, 'image/jpeg')
pic3 = Net::HTTP::FileForPost.new('pic3.png', 'image/png')
pic1_t = Net::HTTP::FileForPost.new('pic1_thumb.jpeg', 'image/jpeg')
pic2_t = Net::HTTP::FileForPost.new(pic2_t_io, 'image/jpeg')
desc = Net::HTTP::FileForPost.new('desc.html', 'text/html',
                                   'index.html') # remote fname

req.set_multipart_data({:gallery_description => des,
                        :pictures => [pic1, pic2, pic3],
                        :thumbnails => [pic1_t, pic2_t]},

                       {:gallery_name => 'mygallery',
                        :encoding => 'utf-8'})



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
 
# File 'lib/image_venue/net_http_post_extensions.rb', line 85

def set_multipart_data(files_params, other_params={}, boundary1='paranguaricutirimirruaru0xdeadbeef', boundary2='paranguaricutirimirruaru0x20132')
  self.content_type = "multipart/form-data; boundary=\"#{boundary1}\""

  body = StringIO.new('r+b')

  # let's do the easy ones first
  other_params.each do |key, value|
    body.write "--#{boundary1}\r\n"
    body.write "content-disposition: form-data; name=\"#{key}\"\r\n"
    body.write "\r\n"
    body.write "#{value}\r\n"
  end

  # now handle the files...
  files_params.each do |name, file_or_files|
    files = [file_or_files].flatten

    if name.to_s =~ /\[\]$/
      files.each do |file|
        body.write "\r\n--#{boundary1}\r\n"
        body.write "content-disposition: form-data; name=\"#{name}\"; filename=\"#{file.base_name}\"\r\n"
        # single-file multipart is different
        body.write "Content-Type: #{file.content_type}\r\n"
        body.write "Content-Transfer-Encoding: binary\r\n"
        body.write "\r\n"
        FileUtils.copy_stream(Kernel::File.open(file.name, 'rb'), body)
      end
    else
      body.write "\r\n--#{boundary1}\r\n"
      body.write "content-disposition: form-data; name=\"#{name}\""
      # multiple-file parameter (multipart/mixed)
      body.write "\r\n"
      body.write "Content-Type: multipart/mixed;"
      body.write " boundary=\"#{boundary2}\"\r\n"

      files.each do |file|
        body.write "\r\n--#{boundary2}\r\n"
        body.write "Content-disposition: attachment"
        body.write "; filename=\"#{file.base_name}\"\r\n"
        body.write "Content-Type: #{file.content_type}\r\n"
        body.write "Content-Transfer-Encoding: binary\r\n"
        body.write "\r\n"
        FileUtils.copy_stream(Kernel::File.open(file.name, 'rb'), body)
      end
      body.write "\r\n--#{boundary2}--\r\n"
    end
  end
  body.write "--#{boundary1}--\r\n"

  body.flush
  self.content_length = body.size
  self.body_stream = body
  self.body_stream.rewind
  return true
end