Setting path parameters in AWS API Gateway JavaScript SDK - amazon-web-services

Question

I'm trying to set path parameters when making calls to API Gateway endpoints via the JavaScript SDK and not having any luck. It looks like I either have something misconfigured or there is a bug in the SDK generation.
I am able to successfully call endpoints that do not take path parameters but when I try to pass in a parameter to be used as a path parameter the SDK just replaces the path parameter with a blank and my call fails.
Example, assume client is a properly initialized API Gateway client. I have an endpoint called /measurement with a child of /measurement/{id}. I am able to call both directly.
client.measurementGet({},{}); - successfully calls my /measurement endpoint
client.measurementIdGet({"id": "1234"}, {}); - Browser makes a call to /measurement/ instead of /measurement/1234
Looking at the source of my apigClient.js, it appears that the SDK generator is not putting path parameters into the list of parameters that it's looking for. For example, the code of my generated measurementIdGet method looks like this:
apigClient.measurementIdGet = function (params, body, additionalParams) {
if(additionalParams === undefined) { additionalParams = {}; }
apiGateway.core.utils.assertParametersDefined(params, [], ['body']);
var measurementIdGetRequest = {
verb: 'get'.toUpperCase(),
path: pathComponent + uritemplate('/measurement/{id}').expand(apiGateway.core.utils.parseParametersToObject(params, [])),
headers: apiGateway.core.utils.parseParametersToObject(params, []),
queryParams: apiGateway.core.utils.parseParametersToObject(params, []),
body: body
};
return apiGatewayClient.makeRequest(measurementIdGetRequest, authType, additionalParams, config.apiKey);
};
I dug into the assertParametersDefined and parseParametersToObject and it looks like those methods are expecting a list of parameters to look for. In both cases the SDK has generated empty lists instead of putting my path parameter in there.
If I manually update the generated file to change the two lines to
apiGateway.core.utils.assertParametersDefined(params, ['id'], ['body']);
and
apiGateway.core.utils.parseParametersToObject(params, ['id'])
The SDK makes the proper call.
Am I missing something in my configuration or is there a bug in the code generator?

Answer 1

If you are using cloud formation like me. You will need to add it in the RequestParameters.
for a resource like this /api/pets/{id}/attributes/{attrid} following code works
PetsByIdAttributesByAttridGetMethod:
Type: 'AWS::ApiGateway::Method'
Properties:
RestApiId: !Ref MyApi
ResourceId: !Ref PetsByIdAttributesByAttridResource
HttpMethod: GET
AuthorizationType: AWS_IAM
RequestParameters:
method.request.path.id : true
method.request.path.attrid : true
Integration:
Type: AWS_PROXY
IntegrationHttpMethod: POST
Uri: !Sub arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${MyLambda.Arn}/invocations

Answer 2

I know it's an old question, but for those new to AWS that may still run into this issue like I did, I hope this answer helps:
In the AWS API Gateway Console, make sure that you specify the "URL Query String Parameters" in the "Method Request" for your "GET". Then re-deploy your API and generate the SDK again. This time the apigClient.js will be generated with the defined Query Parameter keys correctly filled in to the calls to assertParametersDefined and parseParametersToObject.

Answer 3

Assuming that you're importing a swagger definition to create the API, defining your parameters at the method level as opposed to the path level will result in a generated SDK with the key filled out and should work correctly.
{
...
"/path/{to}/resource": {
"get": {
"parameters": [ // define here
"name": "to",
"in": "path",
...
],
...
},
"parameters": [] // not here
}
Although defining parameters at the path level is correct according the the Swagger spec and API Gateway does use them in the created API, it appears that API Gateway disregards them in some contexts.

Answer 4

This look's like an issue doesn't parse the params.
https://github.com/aws/chalice/issues/498enter link description here