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# inspired by/cargo-culted from http://stanislavvitvitskiy.blogspot.com/2008/12/multipart-post-in-ruby.html
# On Apr 6, 2010, at 3:00 PM, Stanislav Vitvitskiy wrote:
#
# It's free to use / modify / distribute. No need to mention anything. Just copy/paste and use.
#
# Regards,
# Stan
require 'net/http'
require 'mixlib/authentication/signedheaderauth'
require 'openssl'
require 'chef/version'
class Chef
class StreamingCookbookUploader
DefaultHeaders = { 'accept' => 'application/json', 'x-chef-version' => ::Chef::VERSION }
class << self
def post(to_url, user_id, secret_key_filename, params = {}, headers = {})
make_request(:post, to_url, user_id, secret_key_filename, params, headers)
end
def put(to_url, user_id, secret_key_filename, params = {}, headers = {})
make_request(:put, to_url, user_id, secret_key_filename, params, headers)
end
def make_request(http_verb, to_url, user_id, secret_key_filename, params = {}, headers = {})
boundary = '----RubyMultipartClient' + rand(1000000).to_s + 'ZZZZZ'
parts = []
content_file = nil
timestamp = Time.now.utc.iso8601
secret_key = OpenSSL::PKey::RSA.new(File.read(secret_key_filename))
unless params.nil? || params.empty?
params.each do |key, value|
if value.kind_of?(File)
content_file = value
filepath = value.path
filename = File.basename(filepath)
parts << StringPart.new( "--" + boundary + "\r\n" +
"Content-Disposition: form-data; name=\"" + key.to_s + "\"; filename=\"" + filename + "\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n")
parts << StreamPart.new(value, File.size(filepath))
parts << StringPart.new("\r\n")
else
parts << StringPart.new( "--" + boundary + "\r\n" +
"Content-Disposition: form-data; name=\"" + key.to_s + "\"\r\n\r\n")
parts << StringPart.new(value.to_s + "\r\n")
end
end
parts << StringPart.new("--" + boundary + "--\r\n")
end
body_stream = MultipartStream.new(parts)
timestamp = Time.now.utc.iso8601
url = URI.parse(to_url)
Chef::Log.logger.debug("Signing: method: #{http_verb}, path: #{url.path}, file: #{content_file}, User-id: #{user_id}, Timestamp: #{timestamp}")
# We use the body for signing the request if the file parameter
# wasn't a valid file or wasn't included. Extract the body (with
# multi-part delimiters intact) to sign the request.
# TODO: tim: 2009-12-28: It'd be nice to remove this special case, and
# always hash the entire request body. In the file case it would just be
# expanded multipart text - the entire body of the POST.
content_body = parts.inject("") { |result,part| result + part.read(0, part.size) }
content_file.rewind if content_file # we consumed the file for the above operation, so rewind it.
signing_options = {
:http_method=>http_verb,
:path=>url.path,
:user_id=>user_id,
:timestamp=>timestamp}
(content_file && signing_options[:file] = content_file) || (signing_options[:body] = (content_body || ""))
headers.merge!(Mixlib::Authentication::SignedHeaderAuth.signing_object(signing_options).sign(secret_key))
content_file.rewind if content_file
# net/http doesn't like symbols for header keys, so we'll to_s each one just in case
headers = DefaultHeaders.merge(Hash[*headers.map{ |k,v| [k.to_s, v] }.flatten])
req = case http_verb
when :put
Net::HTTP::Put.new(url.path, headers)
when :post
Net::HTTP::Post.new(url.path, headers)
end
req.content_length = body_stream.size
req.content_type = 'multipart/form-data; boundary=' + boundary unless parts.empty?
req.body_stream = body_stream
http = Net::HTTP.new(url.host, url.port)
if url.scheme == "https"
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
end
res = http.request(req)
#res = http.start {|http_proc| http_proc.request(req) }
# alias status to code and to_s to body for test purposes
# TODO: stop the following madness!
class << res
alias :to_s :body
# BUGBUG this makes the response compatible with what respsonse_steps expects to test headers (response.headers[] -> response[])
def headers
self
end
def status
code.to_i
end
end
res
end
end
class StreamPart
def initialize(stream, size)
@stream, @size = stream, size
end
def size
@size
end
# read the specified amount from the stream
def read(offset, how_much)
@stream.read(how_much)
end
end
class StringPart
def initialize(str)
@str = str
end
def size
@str.length
end
# read the specified amount from the string startiung at the offset
def read(offset, how_much)
@str[offset, how_much]
end
end
class MultipartStream
def initialize(parts)
@parts = parts
@part_no = 0
@part_offset = 0
end
def size
@parts.inject(0) {|size, part| size + part.size}
end
def read(how_much)
return nil if @part_no >= @parts.size
how_much_current_part = @parts[@part_no].size - @part_offset
how_much_current_part = if how_much_current_part > how_much
how_much
else
how_much_current_part
end
how_much_next_part = how_much - how_much_current_part
current_part = @parts[@part_no].read(@part_offset, how_much_current_part)
# recurse into the next part if the current one was not large enough
if how_much_next_part > 0
@part_no += 1
@part_offset = 0
next_part = read(how_much_next_part)
current_part + if next_part
next_part
else
''
end
else
@part_offset += how_much_current_part
current_part
end
end
end
end
end
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