integration of lambda authorizer to api gateway

Question

I have a lambda configured to run as an HTTP server. Following example event is passed to it,

```
{
  "version": "2.0",
  "routeKey": "$default",
  "rawPath": "/path/to/resource",
  "rawQueryString": "sale_code=1&service=Dashboards&aws_account_id=021211401397&authorization=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.gC_1PkwHHQNlnMgljXmnTolI9ZywePsE2FqFcY8zKcaFWuvZwRN-cxzGlbT_aOLeTxF9ZeSzNzQHwQ_mBcTe7KBeZH4CI1ODvE5Fpg0UahE-lQIcXN8g9k9Mmd6JvQ6zRagAqIqm_4ct3yDExUooUwEOxmln3JOCpttuARFJppRydNDqdZ61kB_QGCl5g-n9ulvO83MNJZJHxIJVrI5FT6qfpTMBAmvRwX2GoFSSfQ74Ai1lTm7ue-PF27H2LmHPuksqnl1jp4QVfn_XJR7g_VqXi1MecoV349RDDIw4hovyLcWc9nEn-waSztkzgcMQ7gFv4TRLAUzGxnMJCXKlZw",
  "cookies": [
    "cookie1",
    "cookie2"
  ],
  "headers": {
    "Header1": "value1",
    "Header2": "value1,value2"
  },
  "queryStringParameters": {
    "parameter1": "value1,value2",
    "parameter2": "value"
  },
  "requestContext": {
    "accountId": "123456789012",
    "apiId": "api-id",
    "authentication": {
      "clientCert": {
        "clientCertPem": "CERT_CONTENT",
        "subjectDN": "www.example.com",
        "issuerDN": "Example issuer",
        "serialNumber": "a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1",
        "validity": {
          "notBefore": "May 28 12:30:02 2019 GMT",
          "notAfter": "Aug  5 09:36:04 2021 GMT"
        }
      }
    },
    "authorizer": {
      "jwt": {
        "claims": {
          "claim1": "value1",
          "claim2": "value2"
        },
        "scopes": [
          "scope1",
          "scope2"
        ]
      }
    },
    "domainName": "id.execute-api.us-east-1.amazonaws.com",
    "domainPrefix": "id",
    "http": {
      "method": "GET",
      "path": "/",
      "protocol": "HTTP/1.1",
      "sourceIp": "192.168.0.1/32",
      "userAgent": "agent"
    },
    "requestId": "id",
    "routeKey": "$default",
    "stage": "$default",
    "time": "12/Mar/2020:19:03:58 +0000",
    "timeEpoch": 1583348638390
  },
  "body": "eyJ0ZXN0IjoiYm9keSJ9",
  "pathParameters": {
    "parameter1": "value1"
  },
  "isBase64Encoded": true,
  "stageVariables": {
    "stageVariable1": "value1",
    "stageVariable2": "value2"
  }
}
```
I have integrated this lambda as my lambda authorizer but when I test it I get this error

```
"statusCode": 422, "headers": {"content-length": "347", "content-type": "application/json"}, "multiValueHeaders": {}, "body": "{\"detail\":[{\"loc\":[\"query\",\"authorization\"],\"msg\":\"field required\",\"type\":\"value_error.missing\"},{\"loc\":[\"query\",\"aws_account_id\"],...
```

How can I fix this?

Accepted Answer

Not sure I completly understand what you are trying to do. If your function is a web server, it is not the same as a Lambda authorizer. A Lambda authorizer is a way to implement custom authorization mechanisms, and there is a specific response format for it.

integration of lambda authorizer to api gateway

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