如何向使用无服务器创建的AWS Lambda函数发送post请求

Question

TLDR

我不知道如何格式化使用无服务器创建的AWS Lambda API的post请求

当前实现

我有一个使用serverless框架创建的Lambda函数。我有两个函数；一个函数打印出所有模块及其版本，另一个函数对通过post请求发送的数据进行预测。它通过挂载EFS卷来处理依赖项存储，这是serverless.yml

service: test3Predict

plugins:
  - serverless-pseudo-parameters

custom:
  efsAccessPoint: fsap-**********
  LocalMountPath: /mnt/efs
  subnetsId: subnet-**********
  securityGroup: sg-**********

provider:
  name: aws
  runtime: python3.6
  region: us-east-2
  timeout: 20

package:
  exclude:
    - node_modules/**
    - .vscode/**
    - .serverless/**
    - .pytest_cache/**
    - __pychache__/**

functions:
  ohPredict:
    handler: handler.lambda_handler_OH
    environment: # Service wide environment variables
      MNT_DIR: ${self:custom.LocalMountPath}
    vpc:
      securityGroupIds:
        - ${self:custom.securityGroup}
      subnetIds:
        - ${self:custom.subnetsId}
    iamManagedPolicies:
      - arn:aws:iam::aws:policy/AmazonElasticFileSystemClientReadWriteAccess
    events:
      - http:
          path: ohPredict
          method: get
    fileSystemConfig:
      localMountPath: '${self:custom.LocalMountPath}'
      arn: 'arn:aws:elasticfilesystem:${self:provider.region}:#{AWS::AccountId}:access-point/${self:custom.efsAccessPoint}'

  test:
    handler: handler.test
    environment: # Service wide environment variables
      MNT_DIR: ${self:custom.LocalMountPath}
    vpc:
      securityGroupIds:
        - ${self:custom.securityGroup}
      subnetIds:
        - ${self:custom.subnetsId}
    iamManagedPolicies:
      - arn:aws:iam::aws:policy/AmazonElasticFileSystemClientReadWriteAccess
    events:
      - http:
          path: test
          method: get
    fileSystemConfig:
      localMountPath: '${self:custom.LocalMountPath}'
      arn: 'arn:aws:elasticfilesystem:${self:provider.region}:#{AWS::AccountId}:access-point/${self:custom.efsAccessPoint}'

看起来测试是有效的；如果我运行sls deploy并在浏览器中输入我的test函数的URL，我就会得到预期的输出。

问题

ohPredict函数也不起作用。当我向它发送一个带有requests python模块的post请求时，

url = 'https://****.execute-api.****.amazonaws.com/dev/ohPredict'
myobj = {"data": data}
x = requests.post(url, json=myobj)
res = eval(x.text)
print(res)

我得到以下错误：

{'message': 'Missing Authentication Token'}

我用一个简单的lambda函数和一个post请求运行了一个测试，没有使用serverless，这就是我需要的所有代码。我想我应该尝试一下并提供一些值，最后我得到了这样的结果：

url = 'https://****.execute-api.****.amazonaws.com/dev/ohPredict'
myobj = {"data": data}
x = requests.post(url, headers={'Authorization': 'FOO'}, json=myobj)
res = eval(x.text)
print(res)

这导致：

{'message': "Authorization header requires 'Credential' parameter. Authorization header requires 'Signature' parameter. Authorization header requires 'SignedHeaders' parameter. Authorization header requires existence of either a 'X-Amz-Date' or a 'Date' header. Authorization=FOO"}

我尝试提供其他值，但没有在输出中得到任何更改。如何让我的post请求被我的函数接收？

Answer 1

正如你在网上提到的，问题出在方法上。只需将method: get替换为method: post，即可修复此问题