start-api ignores isBase64Encoded: true #1826
Description
Description
When my function returns a base64 encoded body with isBase64Encoded: true, sam local start-api returns a response that is base64 encoded.
Steps to reproduce
Write a function
package main
import (
"context"
"encoding/base64"
"net/http"
"github.com/aws/aws-lambda-go/events"
"github.com/aws/aws-lambda-go/lambda"
)
func handle(ctx context.Context, r events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
return events.APIGatewayProxyResponse{
StatusCode: http.StatusOK,
Body: base64.StdEncoding.EncodeToString([]byte("hello")),
IsBase64Encoded: true,
}, nil
}
func main() {
lambda.Start(handle)
}
Define template
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Resources:
Function:
Type: AWS::Serverless::Function
Properties:
CodeUri: build
FunctionName: test
Handler: main
Runtime: go1.x
Timeout: 3
Events:
Root:
Type: Api
Properties:
Path: /
Method: ANY
CatchAll:
Type: Api
Properties:
Path: /{proxy+}
Method: ANY
Build function
GOOS=linux go build -o build/main .
Start sam
sam local start-api -t template.yml --skip-pull-image
Get the result
curl http://127.0.0.1:3000
Observed result
aGVsbG8=
Expected result
hello
Additional environment details (Ex: Windows, Mac, Amazon Linux etc)
- OS: Mac
sam --version: SAM CLI, version 0.43.0
--debug output
Telemetry endpoint configured to be https://xxx
local start-api command is called
No Parameters detected in the template
2 resources found in the template
Found Serverless function with name='Function' and CodeUri='build'
No Parameters detected in the template
2 resources found in the template
Found '2' API Events in Serverless function with name 'Function'
Detected Inline Swagger definition
Lambda function integration not found in Swagger document at path='/' method='x-amazon-apigateway-any-method'
Lambda function integration not found in Swagger document at path='/{proxy+}' method='x-amazon-apigateway-any-method'
Found '0' APIs in resource 'ServerlessRestApi'
Removed duplicates from '0' Explicit APIs and '2' Implicit APIs to produce '2' APIs
2 APIs found in the template
Mounting Function at http://127.0.0.1:3000/ [DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT]
Mounting Function at http://127.0.0.1:3000/{proxy+} [DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT]
You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template
Localhost server is starting up. Multi-threading = True
2020-02-27 17:25:58 * Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)
Constructed String representation of Event to invoke Lambda. Event: {"httpMethod": "GET", "body": null, "resource": "/", "requestContext": {"resourceId": "123456", "apiId": "1234567890", "resourcePath": "/", "httpMethod": "GET", "requestId": "c6af9ac6-7b61-11e6-9a41-93e8deadbeef", "accountId": "123456789012", "stage": "Prod", "identity": {"apiKey": null, "userArn": null, "cognitoAuthenticationType": null, "caller": null, "userAgent": "Custom User Agent String", "user": null, "cognitoIdentityPoolId": null, "cognitoAuthenticationProvider": null, "sourceIp": "127.0.0.1", "accountId": null}, "extendedRequestId": null, "path": "/"}, "queryStringParameters": null, "multiValueQueryStringParameters": null, "headers": {"Host": "127.0.0.1:3000", "User-Agent": "curl/7.54.0", "Accept": "*/*", "X-Forwarded-Proto": "http", "X-Forwarded-Port": "3000"}, "multiValueHeaders": {"Host": ["127.0.0.1:3000"], "User-Agent": ["curl/7.54.0"], "Accept": ["*/*"], "X-Forwarded-Proto": ["http"], "X-Forwarded-Port": ["3000"]}, "pathParameters": null, "stageVariables": null, "path": "/", "isBase64Encoded": false}
Found one Lambda function with name 'Function'
Invoking main (go1.x)
No environment variables found for function 'Function'
Environment variables overrides data is standard format
Loading AWS credentials from session with profile 'None'
Resolving code path. Cwd=/path, CodeUri=build
Resolved absolute path to code is /path/build
Code /path/build is not a zip/jar file
Skipping building an image since no layers were defined
Requested to skip pulling images ...
Mounting /path/build as /var/task:ro,delegated inside runtime container
Starting a timer for 3 seconds for function 'Function'
START RequestId: ba25691e-7a74-1f8f-bd6a-15527b27c20f Version: $LATEST
END RequestId: ba25691e-7a74-1f8f-bd6a-15527b27c20f
REPORT RequestId: ba25691e-7a74-1f8f-bd6a-15527b27c20f Init Duration: 211.99 ms Duration: 6.47 ms Billed Duration: 100 ms Memory Size: 128 MB Max Memory Used: 22 MB
No Content-Type given. Defaulting to 'application/json'.
2020-02-27 17:26:05 127.0.0.1 - - [27/Feb/2020 17:26:05] "GET / HTTP/1.1" 200 -