我有這個 python lambda 函數import jsondef lambda_handler(event, context): post_user = "" post_user = event["user"] print(post_user) return { "statusCode": 200, "headers": {"Content-Type": "application/json"}, "body": True }當我在 lambda IDE 中運行測試時，這按預期工作。測試配置為通過：{“用戶”：“約翰”，“密碼”：“密碼1”}但是當我使用 API Gateway 運行測試時，我收到此錯誤：Mon Mar 25 20:47:29 UTC 2019：轉換前的端點響應主體：{"errorMessage": "'user'", "errorType": "KeyError", "stackTrace": [" File \"/var/task/ lambda_function.py\", line 6, in lambda_handler\n post_user = event[\"user\"]\n"]} Mon Mar 25 20:47:29 UTC 2019：由于客戶函數錯誤，Lambda 執行失敗，狀態為 200 ：'用戶'。Lambda 請求 ID：f7955f74-e608-4b10-b216-4e4acf682307 Mon Mar 25 20:47:29 UTC 2019：方法完成，狀態：502我已經定義了 API 網關測試如下：
2 回答
HUWWW
TA貢獻1874條經驗 獲得超12個贊
這是因為當event對象來自 API Gateway 時，它上面有一些額外的信息。它不像您用來從控制臺進行測試的 JSON 那樣簡單。
您需要首先訪問該body對象，然后最后訪問您的 JSON 對象。
以下是來自 API Gateway 的事件的樣子：
{
"path": "/test/hello",
"headers": {
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"Accept-Encoding": "gzip, deflate, lzma, sdch, br",
"Accept-Language": "en-US,en;q=0.8",
"CloudFront-Forwarded-Proto": "https",
"CloudFront-Is-Desktop-Viewer": "true",
"CloudFront-Is-Mobile-Viewer": "false",
"CloudFront-Is-SmartTV-Viewer": "false",
"CloudFront-Is-Tablet-Viewer": "false",
"CloudFront-Viewer-Country": "US",
"Host": "wt6mne2s9k.execute-api.us-west-2.amazonaws.com",
"Upgrade-Insecure-Requests": "1",
"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36 OPR/39.0.2256.48",
"Via": "1.1 fb7cca60f0ecd82ce07790c9c5eef16c.cloudfront.net (CloudFront)",
"X-Amz-Cf-Id": "nBsWBOrSHMgnaROZJK1wGCZ9PcRcSpq_oSXZNQwQ10OTZL4cimZo3g==",
"X-Forwarded-For": "192.168.100.1, 192.168.1.1",
"X-Forwarded-Port": "443",
"X-Forwarded-Proto": "https"
},
"pathParameters": {
"proxy": "hello"
},
"requestContext": {
"accountId": "123456789012",
"resourceId": "us4z18",
"stage": "test",
"requestId": "41b45ea3-70b5-11e6-b7bd-69b5aaebc7d9",
"identity": {
"cognitoIdentityPoolId": "",
"accountId": "",
"cognitoIdentityId": "",
"caller": "",
"apiKey": "",
"sourceIp": "192.168.100.1",
"cognitoAuthenticationType": "",
"cognitoAuthenticationProvider": "",
"userArn": "",
"userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36 OPR/39.0.2256.48",
"user": ""
},
"resourcePath": "/{proxy+}",
"httpMethod": "GET",
"apiId": "wt6mne2s9k"
},
"resource": "/{proxy+}",
"httpMethod": "GET",
"queryStringParameters": {
"name": "me"
},
"stageVariables": {
"stageVarName": "stageVarValue"
},
"body": "'{\"user\":\"john\",\"pwd\":\"pwd1\"}'"
}
請記住，body來自 API 網關的始終是字符串化的，因此如果您想訪問它，首先需要使用json.loads(event["body"]).
請記住，當返回 API Gateway 時，您的響應正文必須是字符串化的，正如我們在此答案中所討論的那樣。
您可以在文檔中看到從 API Gateway 發送的事件
慕神8447489
TA貢獻1780條經驗 獲得超1個贊
我從回復中得到的關鍵與他的建議不同，但他的建議對我有幫助，所以我接受它作為答案
我得到了這個回應。該body鍵來為null。但有queryStringParameters
{
"resource": "/match_creds",
"path": "/match_creds",
"httpMethod": "GET",
"headers": null,
"multiValueHeaders": null,
"queryStringParameters": {
"pwd": "pwd1",
"user": "JOHN"
},
"multiValueQueryStringParameters": {
"pwd": [
"pwd1"
],
"user": [
"JOHN"
]
},
"pathParameters": null,
"stageVariables": null,
"requestContext": {
"path": "/match_creds",
"accountId": "",
"resourceId": "",
"stage": "test-invoke-stage",
"domainPrefix": "testPrefix",
"requestId": "",
"identity": {
"cognitoIdentityPoolId": null,
"cognitoIdentityId": null,
"apiKey": "test-invoke-api-key",
"cognitoAuthenticationType": null,
"userArn": "",
"apiKeyId": "test-invoke-api-key-id",
"userAgent": "",
"accountId": "",
"caller": "",
"sourceIp": "test-invoke-source-ip",
"accessKey": "",
"cognitoAuthenticationProvider": null,
"user": ""
},
"domainName": "testPrefix.testDomainName",
"resourcePath": "/match_creds",
"httpMethod": "GET",
"extendedRequestId": "",
"apiId": ""
},
"body": null,
"isBase64Encoded": false
}
我改變了我的功能
import json
def lambda_handler(event, context):
json_data = event["queryStringParameters"]
user = json_data["user"]
return {
"statusCode": 200,
"headers": {"Content-Type": "application/json"},
"body": json.dumps(user)
}
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