Async-pseudo-web-proxy for AWS Lambda
Use case: set up phoxy as a Lambda function to run in a VPC private subnet and allow functions not in the same VPC to access resources.
- Create a Lambda function for phoxy
- Make sure IAM role has permission to invoke functions expecting response returns
- Copy
phoxy.rbto requesting Lambda functions andrequire
- Make sure IAM role has permission to invoke phoxy
From a Lambda function, prepare a request and invoke phoxy.
require_relative './phoxy'
# ...
params = {
url: 'https://id:[email protected]:80/path?q=keyword',
http_method: :post,
http_headers: {"content-type": "application/json"},
http_body: "{\"message\":\"Hello!\"}",
return_arn: context.invoked_function_arn,
context: "some string..."
}
preq = Phoxy::Request.new(params)
preq.send_to_arn('aws:lambda:us:12345:my-phoxy')phoxy will process the request and return a response if return_arn is set.
Just pass the event object the handler receives. If it is not a Phoxy::Response it will return nil.
require_relative './phoxy'
# ...
pres = Phoxy::Response.from_event(event)
if pres
puts JSON.parse(pres.http_body)
else
# When it's not a Phoxy::Response
endPhoxy::Response structure example.
pres.url # => 'https://id:[email protected]:80/path?q=keyword'
pres.context # => 'some string...'
pres.http_status # => 200
pres.http_headers # => {
# "date": ["Sun, 13 Feb 2022 01:23:45 GMT"],
# "content-type": ["application/json"],
# "content-length": ["678"]
# }