fineuploader 多部分 rails

Question

我正在尝试使用 rails 作为服务器进行分段上传以签署请求。下面是代码片段。 signature.endpoint 是创建动作。

require 'base64'
require 'openssl'
require 'digest/sha1'
class WelcomeController < ApplicationController
  skip_before_action :verify_authenticity_token
  def success
    render json: params
  end
  def index
  end
  def create
    if(params[:headers])
      signature = OpenSSL::HMAC.digest(
      OpenSSL::Digest::Digest.new('sha1'),
      key,
        params[:headers].to_s).gsub("\n", "")
       params[:signature]= signature
    else
     conditions =  params[:conditions]
     conds =  [
       {"acl" => "private"},
       {"bucket" => conditions[1][:bucket]},
       {"Content-Type" => conditions[2]["Content-Type"]},
       {"success_action_status" => "200"},
       {"key" => conditions[4][:key]},
       {"x-amz-meta-qqfilename" => conditions[5]["x-amz-meta-qqfilename"]}
       ]
       policy = Base64.encode64({  "expiration" => params[:expiration],
                                  "conditions" => conds
                                }.to_json).
                      gsub("\n","")

       signature = Base64.encode64(
       OpenSSL::HMAC.digest(
        OpenSSL::Digest::Digest.new('sha1'),
         key, policy)
        ).gsub("\n","")
    params[:signature]= signature
    params[:policy] = policy
  end
   render :json => params, :status => 200 and return
 end
end

这适用于大小 < 5mb 的文件，即 if-else 块的 else 部分。但是，当文件大小 > 5mb 时，请求未正确签名。

请提出我在这里遗漏了什么。

Answer 1

索恩：

require 'base64'
require 'openssl'
require 'digest/sha1'
class WelcomeController < ApplicationController
  skip_before_action :verify_authenticity_token
  def success
   render json: params
  end
  def index


  end
  def create
   if(params[:headers])
         logger.info params[:welcome][:headers]
          signature = Base64.encode64(OpenSSL::HMAC.digest(
          OpenSSL::Digest::Digest.new('sha1'),
          key,
            params[:welcome][:headers])).gsub("\n", "")
           params[:signature]= signature
   else
    conditions =  params[:conditions]
    conds =  [
      {"acl" => "public-read"},
      {"bucket" => conditions[1][:bucket]},
      {"Content-Type" => conditions[2]["Content-Type"]},
      {"success_action_status" => "200"},
      {"key" => conditions[4][:key]},
      {"x-amz-meta-qqfilename" => conditions[5]["x-amz-meta-qqfilename"]}
    ]
    policy = Base64.encode64({  "expiration" => params[:expiration],
                                      "conditions" => conds
                                    }.to_json).
                          gsub("\n","")
    signature = Base64.encode64(
    OpenSSL::HMAC.digest(
        OpenSSL::Digest::Digest.new('sha1'),
        key, policy)
    ).gsub("\n","")
     params[:signature]= signature
     params[:policy] = policy
     end
      logger.info signature
      render :json => params, :status => 200 and return
  end
end

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