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我正在使用 Webmock 测试由 ruby​​ aws-sdk（在本例中为 aws-sdk-batch）发出的 http 请求。

当请求失败时， Webmock 使用更方便的哈希差异和部分匹配来处理 json 请求，但只有当Content-Type存根请求的application/json.

然而，aws-sdk-batchgem 创建了一个空请求Content-type（尽管已将内容类型记录为 application/json），并且似乎依赖端点的默认行为将其解释为application/json.

我想手动添加 header Content-type: application/json，以便我可以从 Webmock 更好地处理 json 请求正文中受益。这可能吗？

未指定的示例 Webmock 响应Content-Type:application/json：

     WebMock::NetConnectNotAllowedError:
       Real HTTP connections are disabled. Unregistered request: POST https://batch.us-east-1.amazonaws.com/v1/submitjob with body '{"jobName":"Fakie","jobQueue":"queue","jobDefinition":"def","parameters":{"task":"{\"fake\":\"town\"}"}}' with headers {'Accept'=>'*/*', 'Accept-Encoding'=>'', 'Authorization'=>'AWS4-HMAC-SHA256 Credential=ACCESS_KEY_ID/20190701/us-east-1/batch/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=5f4bf85ba48333e6cda6ff613b4ea2faacd0417b4136621c58b87a488c3019ee', 'Content-Length'=>'106', 'Content-Type'=>'', 'Host'=>'batch.us-east-1.amazonaws.com', 'User-Agent'=>'aws-sdk-ruby3/3.54.2 ruby/2.5.5 x86_64-darwin18 aws-sdk-batch/1.20.0', 'X-Amz-Content-Sha256'=>'cf52595364d1a588b4ca4fdeaddb8170e4ad944fa28ac6df647484bb596de9c4', 'X-Amz-Date'=>'20190701T215756Z'}

       You can stub this request with the following snippet:

       stub_request(:post, "https://batch.us-east-1.amazonaws.com/v1/submitjob").
         with(
           body: "{\"jobName\":\"Fakie\",\"jobQueue\":\"quue\",\"jobDefinition\":\"def\",\"parameters\":{\"task\":\"{\\\"fake\\\":\\\"town\\\"}\"}}",
           headers: {
          'Accept'=>'*/*',
          'Accept-Encoding'=>'',
          'Authorization'=>'AWS4-HMAC-SHA256 Credential=ACCESS_KEY_ID/20190701/us-east-1/batch/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=5f4bf85ba48333e6cda6ff613b4ea2faacd0417b4136621c58b87a488c3019ee',
          'Content-Length'=>'106',
          'Content-Type'=>'',
          'Host'=>'batch.us-east-1.amazonaws.com',
          'User-Agent'=>'aws-sdk-ruby3/3.54.2 ruby/2.5.5 x86_64-darwin18 aws-sdk-batch/1.20.0',
          'X-Amz-Content-Sha256'=>'cf52595364d1a588b4ca4fdeaddb8170e4ad944fa28ac6df647484bb596de9c4',
          'X-Amz-Date'=>'20190701T215756Z'
           }).
         to_return(status: 200, body: "", headers: {})

       registered request stubs:

       stub_request(:post, "https://batch.us-east-1.amazonaws.com/v1/submitjob").
         with(
           body: {"jobDefinition"=>"def", "jobName"=>"Wrong", "jobQueue"=>"queue", "parameters"=>{"task"=>"{\"fake\":\"town\"}"}})

正如您所看到的，当这些字符串测试失败时，您将面临逐个字符挑选正文的痛苦任务，这是一种非常可怕的开发人员体验。Hashdiff 的体验要好得多。

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1 回答 1

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AWS 开发工具包的基本 http 客户端称为 Seahorse，允许您添加更改请求链行为的处理程序。

可以添加标头的处理程序Content-Type:application/json如下所示：

  class ContentType < Seahorse::Client::Plugin
    class Handler < Seahorse::Client::Handler
      def call(context)
        context.http_request.headers['Content-Type'] = 'application/json'
        @handler.call(context)
      end
    end
    handler(Handler, step: :sign, priority: 0)
  end

然后可以将其添加到继承自 Seahorse 的 AWS 开发工具包服务：

Aws::Batch::Client.add_plugin(ContentType)

现在 Webmock 将响应这样的失败：

...
       registered request stubs:

       stub_request(:post, "https://batch.us-east-1.amazonaws.com/v1/submitjob").
         with(
           body: {"jobDefinition"=>"def", "jobName"=>"Wrong", "jobQueue"=>"queueName", "parameters"=>{"task"=>"{\"fake\":\"town\"}"}})

       Body diff:
        [["~", "jobName", "Fakie", "Wrong"]]
于 2019-07-01T21:55:06.107 回答