是否可以使用set_form方法在多部分请求中设置Content-type？

Question

我需要使用net / http类中的方法“ set_form”将Content-type = "application/pdf"设置为请求的参数，但它始终向我显示Content-Type =“ application / octet-stream”。

我已经签出documentation for set_form，但是我不知道如何正确设置Content-Type。

    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Post.new("#{path}")
    request.set_form([
        ["parameter1","#{parameter1}"],
        ["parameter2","#{parameter2}"],
        ["attachment", File.new("/home/name.pdf", "rb")]
    ], 'multipart/form-data')
    response = http.request(request)

我已经尝试使用此代码来设置像文档一样的opt哈希，但是我收到了相同的响应：

uri = URI.parse("#{host}")
    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Post.new("#{path}")
    request.set_form([
        ["parameter1","#{parameter1}"],
        ["parameter2","#{parameter2}"],
        ["attachment", File.new("/home/name.pdf", "rb"), { "Content-Type" => "application/pdf" }]
    ], 'multipart/form-data')
    response = http.request(request)

实际输出仍然是Content-Type: application/octet-stream，但我需要：

... Content-Disposition: form-data; name=\"attachment\"; filename=\"name.pdf\"\r\nContent-Type: application/pdf\r\n\r\n%PDF-1.5\r%\xE2\xE ...

Answer 1

我发现了这个（https://dradisframework.com/blog/2017/04/dradis-attachments-api-using-ruby/），不确定是否有帮助。

此代码为请求构建各个身体部位。

require 'net/http'

uri = URI('http://dradis.ip/pro/api/nodes/18/attachments')

Net::HTTP.start(uri.host, uri.port) do |http|

  # Read attachments associated to a specific node:
  get_request = Net::HTTP::Get.new uri
  get_request['Authorization'] = 'Token token="iOEFCQDR-miTHNTjiBxObjWC"'
  get_request['Dradis-Project-Id'] = '8'
  get_response = http.request(get_request)
  puts get_response.body

  # Attach some other files to that node:
  BOUNDARY = "AaB03x"
  file1 = '/your/local/path/image1.png'
  file2 = '/your/local/path/image2.png'

  post_body = []

  post_body << "--#{BOUNDARY}\r\n"

  post_body << "Content-Disposition: form-data; name=\"files[]\"; filename=\"#{File.basename(file1)}\"\r\n"
  post_body << "Content-Type: image/png\r\n"
  post_body << "\r\n"
  post_body << File.read(file1)

  post_body << "\r\n--#{BOUNDARY}\r\n"

  post_body << "Content-Disposition: form-data; name=\"files[]\"; filename=\"#{File.basename(file2)}\"\r\n"
  post_body << "Content-Type: image/png\r\n"
  post_body << "\r\n"
  post_body << File.read(file2)

  post_body << "\r\n--#{BOUNDARY}--\r\n"

  post_request = Net::HTTP::Post.new uri
  post_request['Authorization'] = 'Token token="iOEFCQDR-miTHNTjiBxObjWC"'
  post_request['Dradis-Project-Id'] = '8'
  post_request.body = post_body.join
  post_request["Content-Type"] = "multipart/form-data, boundary=#{BOUNDARY}"

  post_response = http.request(post_request)
  puts post_response.body
end

Answer 2

我认为，对于多部分请求，这是不可能的，正如您在code for the set_form method中看到的那样，当设置了不同的内容类型时，它将引发错误。

set_form

肯定有其他我认为的解决方法，或者您可以简单地使用不同的http客户端（如HTTParty）来支持多部分请求的不同内容类型，开始读取

# File net/http/header.rb, line 452
def set_form(params, enctype='application/x-www-form-urlencoded', formopt={})
  @body_data = params
  @body = nil
  @body_stream = nil
  @form_option = formopt
  case enctype
  when /\Aapplication\/x-www-form-urlencoded\z/i,
    /\Amultipart\/form-data\z/i
    self.content_type = enctype
  else
    raise ArgumentError, "invalid enctype: #{enctype}"
  end
end

，然后继续输入the example here。我没有找到更好的文档。