c# - 读取多部分/表单数据 aws lamda .NET 核心

Question

我的 AWS lambda 函数在 .NET Core 3.1 中实现并部署在 AWS API 网关后面。我在 API 网关中启用了 multipart/form-data。使用邮递员，我可以使用表单参数和 excel 文件调用函数处理程序。我正在接收 base64 格式的文件和其他表单内容。

我正在使用邮递员并发送两个表单字段。file_data -> 附加的 Excel 文件 ConnectionId -> 字符串参数

API 网关正在接收以下请求。

{
"Resource": "/uploadexcelfile",
"Path": "/uploadexcelfile",
"HttpMethod": "POST",
"Headers": {
    "Accept": "*/*",
    "Accept-Encoding": "gzip, deflate, br",
    "Accept-Language": "en-US,en;q=0.9,la;q=0.8",
    "cache-control": "no-cache",
    ...........
"MultiValueHeaders": {
    "Accept": [
        "*/*"
    ],
    "Accept-Encoding": [
        "gzip, deflate, br"
    ],
    "Accept-Language": [
        "en-US,en;q=0.9,la;q=0.8"
    ],
    "cache-control": [
        "no-cache"
    ],
    .................
    "content-type": [
        "multipart/form-data"
    ],
    "Host": [
        "e32uavabf4.execute-api.eu-west-2.amazonaws.com"
     
    "X-Forwarded-For": [
        "120.138.1.151, 64.252.191.154"
    ],
    "X-Forwarded-Port": [
        "443"
    ],
    "X-Forwarded-Proto": [
        "https"
    ]
},
"RequestContext": {
    "Path": "/qa/uploadexcelfile",
    "AccountId": "575372985953",
    "ResourceId": "z5ia5b",
    "Stage": "qa",
    "RequestId": "41f54841-4205-4427-add1-4581bb8fa3f7",
    "Identity": {
        "SourceIp": "120.138.1.151",
        "UserAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36"
    },
    "ResourcePath": "/uploadexcelfile",
    "HttpMethod": "POST",
    "ApiId": "e32uavabf4",
    "ExtendedRequestId": "FdbMlGPYrPEFoNQ=",
    "ConnectionAt": 0,
    "DomainName": "e32uavabf4.execute-api.eu-west-2.amazonaws.com",
    "DomainPrefix": "e32uavabf4",
    "RequestTime": "10/Sep/2021:18:35:47 +0000",
    "RequestTimeEpoch": 1631298947586
},
"Body": 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"IsBase64Encoded": true

}

如何在我的 lamda 函数中转换这个 base64 字符串并读取表单参数和 Excel 文件。

标签： c#.net-coreaws-lambdaaws-api-gatewaymultipartform-data