how to send post requests to AWS Lambda function created with serverless - post

Question

TLDR
I cant figure out how to format my post request for my AWS Lambda API created with serverless
Current Implementation
I have a Lambda function created using the serverless framework. I have two functions; a function which prints out all modules and their version, and another that does a prediction on data sent via a post request. It handles dependency storage by mounting an EFS volume, here's the 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}'
It seems like the test is working; If I run sls deploy and enter the URL for my test function in a browser, I get the expected output.
Problem
The ohPredict function is not working as well. When I send it a post request with the requests python module,
url = 'https://****.execute-api.****.amazonaws.com/dev/ohPredict'
myobj = {"data": data}
x = requests.post(url, json=myobj)
res = eval(x.text)
print(res)
I get the following error:
{'message': 'Missing Authentication Token'}
I ran a test with a simple lambda function and a post request without using serverless, and that was all the code I needed. I figured I would try experimenting and supplying a few values, and I ended up with this:
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)
which resulted in:
{'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"}
I tried playing around with supplying other values, and didn't get any change in the output. How can I get my post request to be recieved by my function?

Answer 1

As mentioned by yvesonline, the problem was the method. This was fixed by simply replacing method: get to method: post