Class: B2::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/b2/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(account_id, application_key) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/b2/connection.rb', line 8

def initialize(, application_key)
  @account_id = 
  @application_key = application_key
end

Instance Attribute Details

#account_id ⇒ Object (readonly)

Returns the value of attribute account_id.



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# File 'lib/b2/connection.rb', line 6

def 
  @account_id
end

#application_key ⇒ Object (readonly)

Returns the value of attribute application_key.



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# File 'lib/b2/connection.rb', line 6

def application_key
  @application_key
end

#download_url ⇒ Object (readonly)

Returns the value of attribute download_url.



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# File 'lib/b2/connection.rb', line 6

def download_url
  @download_url
end

Instance Method Details

#active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/b2/connection.rb', line 60

def active?
  !@connection.nil? && @connection.active?
end

#authorization_token ⇒ Object 



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# File 'lib/b2/connection.rb', line 53

def authorization_token
  if @auth_token_expires_at.nil? || @auth_token_expires_at <= Time.now.to_i
    reconnect!
  end
  @auth_token
end

#buckets ⇒ Object 



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# File 'lib/b2/connection.rb', line 89

def buckets
  post('/b2api/v1/b2_list_buckets', {accountId: @account_id})['buckets'].map do |b|
    B2::Bucket.new(b, self)
  end
end

#connect! ⇒ Object 



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# File 'lib/b2/connection.rb', line 13

def connect!
  conn = Net::HTTP.new('api.backblazeb2.com', 443)
  conn.use_ssl = true
  
  req = Net::HTTP::Get.new('/b2api/v1/b2_authorize_account')
  req.basic_auth(, application_key)

  key_expiration = Time.now.to_i + 86_400 #24hr expiry
  resp = conn.start { |http| http.request(req) }
  if resp.is_a?(Net::HTTPSuccess)
    resp = JSON.parse(resp.body)
  else
    raise "Error connecting to B2 API"
  end

  uri = URI.parse(resp['apiUrl'])
  @connection = Net::HTTP.new(uri.host, uri.port)
  @connection.use_ssl = uri.scheme == 'https'
  @connection.start

  @auth_token_expires_at = key_expiration
  @minimum_part_size = resp['absoluteMinimumPartSize']
  @recommended_part_size = resp['recommendedPartSize']
  @auth_token = resp['authorizationToken']
  @download_url = resp['downloadUrl']
  @buckets_cache = []
end

#disconnect! ⇒ Object 



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# File 'lib/b2/connection.rb', line 41

def disconnect!
  if @connection
    @connection.finish if @connection.active?
    @connection = nil
  end
end

#download(bucket, key, to = nil, &block) ⇒ Object 



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# File 'lib/b2/connection.rb', line 115

def download(bucket, key, to=nil, &block)
  opened_file = (to && to.is_a?(String))
  to = ::File.open(to, 'wb') if to.is_a?(String)
  digestor = Digest::SHA1.new
  data = ""

  uri = URI.parse(@download_url)
  conn = Net::HTTP.new(uri.host, uri.port)
  conn.use_ssl = uri.scheme == 'https'

  req = Net::HTTP::Get.new("/file/#{bucket}/#{key}")
  req['Authorization'] = authorization_token
  conn.start do |http|
    http.request(req) do |response|
      case response
      when Net::HTTPSuccess
        response.read_body do |chunk|
          digestor << chunk
          if to
            to << chunk
          elsif block
            block(chunk)
          else
            data << chunk
          end
        end
  
        if digestor.hexdigest != response['X-Bz-Content-Sha1']
          raise 'file error'
        end
      when Net::HTTPNotFound
        raise B2::NotFound.new(JSON.parse(response.body)['message'])
      else
        begin
          body = JSON.parse(response.body)
          if body['code'] == 'not_found'
            raise B2::NotFound(body['message'])
          else
            raise "#{body['code']} (#{body['message']})"
          end
        rescue
          raise response.body
        end
      end
    end
  end
  
  if opened_file
    to.close
  elsif to
    to.flush
  end
  block.nil? && to.nil? ? data : nil
end

#get(path, body = nil, &block) ⇒ Object 



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# File 'lib/b2/connection.rb', line 170

def get(path, body=nil, &block)
  request = Net::HTTP::Get.new(path)
  
  send_request(request, body, &block)
end

#get_download_url(bucket, filename, expires_in: 3_600, disposition: nil) ⇒ Object 



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# File 'lib/b2/connection.rb', line 103

def get_download_url(bucket, filename, expires_in: 3_600, disposition: nil)
  response = post("/b2api/v1/b2_get_download_authorization", {
    bucketId: lookup_bucket_id(bucket),
    fileNamePrefix: filename,
    validDurationInSeconds: expires_in,
    b2ContentDisposition: disposition
  })
  url =  @download_url + '/file/' + bucket + '/' + filename + "?Authorization=" + response['authorizationToken']
  url += "&b2ContentDisposition=#{CGI.escape(disposition)}" if disposition
  url
end

#lookup_bucket_id(name) ⇒ Object 



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# File 'lib/b2/connection.rb', line 95

def lookup_bucket_id(name)
  bucket = @buckets_cache.find{ |b| b.name == name }
  return bucket.id if bucket

  @buckets_cache = buckets
  @buckets_cache.find{ |b| b.name == name }&.id
end

#post(path, body = nil, &block) ⇒ Object 



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# File 'lib/b2/connection.rb', line 176

def post(path, body=nil, &block)
  request = Net::HTTP::Post.new(path)
  
  send_request(request, body, &block)
end

#reconnect! ⇒ Object 



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# File 'lib/b2/connection.rb', line 48

def reconnect!
  disconnect!
  connect!
end

#send_request(request, body = nil, &block) ⇒ Object 



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# File 'lib/b2/connection.rb', line 64

def send_request(request, body=nil, &block)
  request['Authorization'] = authorization_token
  request.body = (body.is_a?(String) ? body : JSON.generate(body)) if body
  
  return_value = nil
  close_connection = false
  @connection.request(request) do |response|
    close_connection = response['Connection'] == 'close'
    
    case response
    when Net::HTTPSuccess
      if block_given?
        return_value = yield(response)
      else
        return_value = JSON.parse(response.body)
      end
    else
      raise "Error connecting to B2 API #{response.body}"
    end
  end
  @connection.finish if close_connection

  return_value
end