发出 OPTIONS 请求时出现 AWS API 网关错误

Question

我正在使用 CFT 为我的 API 创建环境。我已经为 CORS 添加了选项。我注意到当我从AWS console for OPTIONS进行测试时，我得到了200响应。 但是，当我从CURL or PostMan执行相同操作时，我收到500内部服务器错误。 在审查了与之相关的SO问题之后。 我已将集成响应修改为 CONVERT_TO_TEXT。 但这也没有解决问题。

我注意到日志中有一个有线行为。 以下是来自 AWS 控制台的请求的日志片段：

Sat Apr 13 15:06:26 UTC 2019 : Method request headers: { Access-Control-Request-Method= POST, Content-Type= application/json}
Sat Apr 13 15:06:26 UTC 2019 : Method request body before transformations: 
Sat Apr 13 15:06:26 UTC 2019 : Method response body after transformations: 
Sat Apr 13 15:06:26 UTC 2019 : Method response headers: {X-Requested-With=*, Access-Control-Allow-Headers=Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-requested-with, Access-Control-Allow-Origin=*, Access-Control-Allow-Methods=POST,OPTIONS, Content-Type=application/json}
Sat Apr 13 15:06:26 UTC 2019 : Successfully completed execution
Sat Apr 13 15:06:26 UTC 2019 : Method completed with status: 200

但是当我从 CRUL 或 PM 发出同样的请求时，我看到了以下日志：

Method request path: {}
Method request query string: {}
Method request headers:  Method request headers: {Accept=*/*, CloudFront-Viewer-Country=IN, CloudFront-Forwarded-Proto=https, CloudFront-Is-Tablet-Viewer=false, CloudFront-Is-Mobile-Viewer=false, User-Agent=curl/7.55.1, X-Forwarded-Proto=https, CloudFront-Is-SmartTV-Viewer=false, Host=MYHOST, X-Forwarded-Port=443,   (CloudFront), Access-Control-Request-Method=POST, CloudFront-Is-Desktop-Viewer=true, Content-Type=application/json}
Method request body before transformations: [Binary Data]
Execution failed due to configuration error: Unable to transform request
Method completed with status: 500

我们可以看到它正在尝试转换[Binary Data]但我没有发送任何东西。

Curl 我用过： curl -X OPTIONS -H "Access-Control-Request-Headers: Content-Type" -H "Access-Control-Request-Method: POST" -H "Access-Control-Allow-Origin: '*'" -v MYHOST

为什么我在日志中看到这种差异？ 我的配置出了什么问题？ 你能帮助我吗。

更新：我正在使用下面的 CFT

Type: AWS::ApiGateway::Method
Properties:
  AuthorizationType: NONE
  HttpMethod: OPTIONS
  Integration:
    Type: MOCK
    IntegrationResponses:
    - StatusCode: 200
      ResponseParameters:
        method.response.header.Access-Control-Allow-Headers: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
        method.response.header.Access-Control-Allow-Methods: "'DELETE,GET,HEAD,OPTIONS,PATCH,POST,PUT'"
        method.response.header.Access-Control-Allow-Origin: "'*'"
    RequestTemplates:
      application/json:
        Fn::Join:
        - ''
        - - "{"
          - ' {"statusCode":200} '
          - "}"
  MethodResponses:
  - StatusCode: 200
    ResponseParameters:
      method.response.header.Access-Control-Allow-Headers: true
      method.response.header.Access-Control-Allow-Methods: true
      method.response.header.Access-Control-Allow-Origin: true

Answer 1

将contentHandling: CONVERT_TO_TEXT参数添加到两个：集成请求和集成响应设置中的要求较少。

在 swagger CORS 配置中看起来像这样：

responses: {
  200: {
    description: "Returning CORS headers",
    headers: {
      "Access-Control-Allow-Headers":{ type: "string" },
      "Access-Control-Allow-Methods": { type: "string" },
      "Access-Control-Allow-Origin": { type: "string" },
    }
  }
},
"x-amazon-apigateway-integration": {
  type: "mock",
  contentHandling: "CONVERT_TO_TEXT", // Resolves problems with cloudfront binary content issues
  requestTemplates: {
    "application/json": "{ \"statusCode\": 200 }"
  },
  responses: {
    "default": {
      statusCode: "200",
      contentHandling: "CONVERT_TO_TEXT", // Resolves problems with cloudfront binary content issues
      responseParameters: {
        "method.response.header.Access-Control-Allow-Headers": "'*'",
        "method.response.header.Access-Control-Allow-Methods" : "'*'",
        "method.response.header.Access-Control-Allow-Origin" : "'*'"
      },
      responseTemplates: {
        "application/json": "{}"
      }
    }
  }
}

Answer 2

对我来说，问题来自这一行：

"x-amazon-apigateway-binary-media-types" : [ "multipart/form-data", "application/zip", "*/*" ]

只需删除"*/*"

"x-amazon-apigateway-binary-media-types" : [ "multipart/form-data", "application/zip" ]

发现这个之后才看到@bgw的评论

无论如何，希望这可以帮助其他不搜索时间的人！

Answer 3

如果在您的 API 网关设置中，您已将“application/json”添加到二进制媒体类型（例如，如果您想要 gzip 响应），或者如果此请求是针对二进制媒体类型的，则由 ' 添加的默认 OPTIONS需要调整启用 CORS 的功能。

就像上面所说的那样，至少对于集成，您需要将 contentHandling 设置为“CONVERT_TO_TEXT”。 对我来说，它无需将其添加到集成响应中即可工作。 您可以通过 AWS CLI 执行以下操作：

aws apigateway update-integration --rest-api-id YOUR_REST_ID --resource-id YOUR_RESOURCE_ID --http-method OPTIONS --patch-operations op='replace',path='/contentHandling',value='CONVERT_TO_TEXT'

哦，不要忘记事后重新部署 API。