{"id":32328,"date":"2023-08-31T01:31:29","date_gmt":"2023-09-13T22:58:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90nodejs%e3%80%91%e4%bd%bf%e7%94%a8aws-lambda%ef%bc%8bapigateway%ef%bc%8bdynamodb%e5%88%9b%e5%bb%batodo%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e3%80%82-2\/"},"modified":"2024-04-30T20:51:06","modified_gmt":"2024-04-30T12:51:06","slug":"%e3%80%90nodejs%e3%80%91%e4%bd%bf%e7%94%a8aws-lambda%ef%bc%8bapigateway%ef%bc%8bdynamodb%e5%88%9b%e5%bb%batodo%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e3%80%82-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90nodejs%e3%80%91%e4%bd%bf%e7%94%a8aws-lambda%ef%bc%8bapigateway%ef%bc%8bdynamodb%e5%88%9b%e5%bb%batodo%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e3%80%82-2\/","title":{"rendered":"\u3010NodeJS\u3011\u4f7f\u7528AWS Lambda\uff0bAPIGateway\uff0bDynamoDB\u521b\u5efaTODO\u5e94\u7528\u7a0b\u5e8f"},"content":{"rendered":"

\u9996\u5148<\/h2>\n

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\u7b80\u8981\u4ecb\u7ecd<\/h2>\n

\u6211\u5011\u4f7f\u7528Lambda\u6642\u4f7f\u7528\u7684\u8a9e\u8a00\u662fNode\u3002
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\n\u8868\u683c\u540d\u7a31\u70ba\u300ctodoTable\u300d\u3002
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\u4f7f\u7528Lambda\u521b\u5efa\u51fd\u6570\u3002<\/h2>\n

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\u9996\u5148\uff0c\u4eceGET\u65b9\u6cd5\u5f00\u59cb\u3002
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const<\/span> AWS<\/span> =<\/span> require<\/span>(<\/span>'<\/span>aws-sdk<\/span>'<\/span>)<\/span>\r\nconst<\/span> dynamo<\/span> =<\/span> new<\/span> AWS<\/span>.<\/span>DynamoDB<\/span>.<\/span>DocumentClient<\/span>()<\/span>\r\n\r\nexports<\/span>.<\/span>handler<\/span> =<\/span> (<\/span>event<\/span>,<\/span> context<\/span>,<\/span> callback<\/span>)<\/span> =><\/span> {<\/span>\r\n    const<\/span> httpMethod<\/span> =<\/span> event<\/span>.<\/span>httpMethod<\/span>\r\n    const<\/span> params<\/span> =<\/span> {<\/span>\r\n        '<\/span>TableName<\/span>'<\/span>:<\/span> '<\/span>todoTable<\/span>'<\/span>\r\n    }<\/span>\r\n    dynamo<\/span>.<\/span>scan<\/span>(<\/span>params<\/span>,<\/span> function<\/span> (<\/span>err<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\r\n        const<\/span> response<\/span> =<\/span> {<\/span>\r\n            statusCode<\/span>:<\/span> 200<\/span>,<\/span>\r\n            body<\/span>:<\/span> JSON<\/span>.<\/span>stringify<\/span>(<\/span>data<\/span>.<\/span>Items<\/span>)<\/span>\r\n        }<\/span>\r\n        callback<\/span>(<\/span>null<\/span>,<\/span> response<\/span>)<\/span>\r\n    })<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u6211\u5011\u5c07\u5728\u5ba2\u6236\u7aef\u5f9e\u8acb\u6c42\u7684body\u4e2d\u63d0\u53d6todoList\u4e26\u986f\u793a\u5b83\u3002<\/p>\n
\u63a5\u4e0b\u6765\u662fPOST\u65b9\u6cd5\u3002<\/p>\n
const<\/span> AWS<\/span> =<\/span> require<\/span>(<\/span>'<\/span>aws-sdk<\/span>'<\/span>)<\/span>\r\nconst<\/span> dynamo<\/span> =<\/span> new<\/span> AWS<\/span>.<\/span>DynamoDB<\/span>.<\/span>DocumentClient<\/span>()<\/span>\r\n\r\nexports<\/span>.<\/span>handler<\/span> =<\/span> (<\/span>event<\/span>,<\/span> context<\/span>,<\/span> callback<\/span>)<\/span> =><\/span> {<\/span>\r\n    const<\/span> params<\/span> =<\/span> {<\/span>\r\n        '<\/span>TableName<\/span>'<\/span>:<\/span> '<\/span>todoTable<\/span>'<\/span>,<\/span>\r\n        '<\/span>Item<\/span>'<\/span>:<\/span> {<\/span>\r\n            '<\/span>id<\/span>'<\/span>:<\/span> event<\/span>.<\/span>id<\/span>,<\/span>\r\n            '<\/span>todo<\/span>'<\/span>:<\/span> event<\/span>.<\/span>todo<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n    dynamo<\/span>.<\/span>put<\/span>(<\/span>params<\/span>,<\/span> function<\/span>(<\/span>err<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\r\n        if<\/span> (<\/span>err<\/span>)<\/span> {<\/span>\r\n            console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>error<\/span>'<\/span>)<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>success<\/span>'<\/span>)<\/span>\r\n            const<\/span> response<\/span> =<\/span> {<\/span>\r\n                statusCode<\/span>:<\/span> 200<\/span>,<\/span>\r\n                body<\/span>:<\/span> JSON<\/span>.<\/span>stringify<\/span>(<\/span>data<\/span>)<\/span>\r\n            }<\/span>\r\n            context<\/span>.<\/span>done<\/span>(<\/span>null<\/span>,<\/span> response<\/span>)<\/span>\r\n        }<\/span>\r\n    })<\/span>\r\n};<\/span>\r\n\r\n<\/code><\/pre>\n
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\n\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48\u5728\u8fd9\u91cc\u4f7f\u7528callback\u4f1a\u88ab\u6307\u8d23\u3002
\n\u5e0c\u671b\u4e86\u89e3\u539f\u56e0\u7684\u4eba\u80fd\u544a\u8bc9\u6211\u3002<\/p>\n
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\u5ba2\u6237\u7aef<\/h2>\n
\u8fd9\u6b21\u6211\u4eec\u5c06\u4e0d\u4f7f\u7528jQuery\uff0c\u800c\u662f\u4f7f\u7528XMLHttpRequest\u6765\u5b9e\u73b0\u3002<\/p>\n
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window<\/span>.<\/span>onload<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n    const<\/span> request<\/span> =<\/span> new<\/span> XMLHttpRequest<\/span>()<\/span>\r\n\r\n    request<\/span>.<\/span>open<\/span>(<\/span>'<\/span>GET<\/span>'<\/span>,<\/span> '<\/span>https:\/\/\u307b\u306b\u3083\u3089\u3089.amazonaws.com\/dev<\/span>'<\/span>,<\/span> true<\/span>)<\/span>\r\n    request<\/span>.<\/span>responseType<\/span> =<\/span> '<\/span>json<\/span>'<\/span>\r\n\r\n    request<\/span>.<\/span>onload<\/span> =<\/span> event<\/span> =><\/span> {<\/span>\r\n        const<\/span> data<\/span> =<\/span> this<\/span>.<\/span>response<\/span>\r\n        const<\/span> todoList<\/span> =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span>data<\/span>.<\/span>body<\/span>)<\/span>\r\n        for<\/span> (<\/span>task<\/span> of<\/span> todoList<\/span>)<\/span> {<\/span>\r\n            const<\/span> item<\/span> =<\/span> task<\/span>.<\/span>todo<\/span>\r\n            \/\/ HTML\u306eul\u306bli\u3092\u7a81\u3063\u8fbc\u3080\u3060\u3051\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\r\n            createTodoList<\/span>(<\/span>item<\/span>)<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    request<\/span>.<\/span>send<\/span>()<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6ca1\u6709\u7279\u522b\u56f0\u96be\u7684\u90e8\u5206\u3002<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6dfb\u52a0\u5728\u6dfb\u52a0TODO\u65f6\u89e6\u53d1\u7684\u4e8b\u4ef6\u3002<\/p>\n
\/\/ add\u3068\u3044\u3046input\u30bf\u30b0\u306b\u30a4\u30d9\u30f3\u30c8\u3092\u8ffd\u52a0<\/span>\r\nconst<\/span> addTask<\/span> =<\/span> document<\/span>.<\/span>querySelector<\/span>(<\/span>'<\/span>.add<\/span>'<\/span>)<\/span>\r\naddTask<\/span>.<\/span>addEventListener<\/span>(<\/span>'<\/span>submit<\/span>'<\/span>,<\/span> e<\/span> =><\/span> {<\/span>\r\n    e<\/span>.<\/span>preventDefault<\/span>()<\/span>\r\n\r\n    const<\/span> id<\/span> =<\/span> Math<\/span>.<\/span>random<\/span>().<\/span>toString<\/span>(<\/span>36<\/span>).<\/span>slice<\/span>(<\/span>-<\/span>8<\/span>);<\/span>\r\n    const<\/span> task<\/span> =<\/span> addTask<\/span>.<\/span>add<\/span>.<\/span>value<\/span>.<\/span>trim<\/span>()<\/span>\r\n    const<\/span> item<\/span> =<\/span> {<\/span>\r\n        '<\/span>id<\/span>'<\/span>:<\/span> id<\/span>,<\/span>\r\n        '<\/span>todo<\/span>'<\/span>:<\/span> task<\/span>\r\n    }<\/span>\r\n\r\n    const<\/span> request<\/span> =<\/span> new<\/span> XMLHttpRequest<\/span>()<\/span>\r\n    request<\/span>.<\/span>open<\/span>(<\/span>'<\/span>POST<\/span>'<\/span>,<\/span> '<\/span>https:\/\/\u307b\u306b\u3083\u3089\u3089.amazonaws.com\/dev\/insert<\/span>'<\/span>,<\/span> true<\/span>)<\/span>\r\n    request<\/span>.<\/span>setRequestHeader<\/span>(<\/span>'<\/span>Content-Type<\/span>'<\/span>,<\/span> '<\/span>application\/json<\/span>'<\/span> );<\/span>\r\n\r\n    request<\/span>.<\/span>send<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>item<\/span>))<\/span>\r\n\r\n    if<\/span> (<\/span>task<\/span>.<\/span>length<\/span>){<\/span>\r\n        createTodoList<\/span>(<\/span>task<\/span>)<\/span>\r\n        addTask<\/span>.<\/span>reset<\/span>()<\/span>\r\n    }<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
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\u8dcc\u5012\u4e86<\/h2>\n
CORS\u95ee\u9898<\/h3>\n
Access-Control-Allow-Origin \r\n<\/code><\/pre>\n
\u56e0\u4e3a\u8fd9\u4e2a\u539f\u56e0\uff0c\u6211\u4e00\u76f4\u88ab\u8d23\u5907\u7740\u3002
\n\u2193\u53c2\u8003\u6587\u7ae0
\n\u3010\u5e26\u89e3\u91ca\u3011\u5982\u4f55\u5728chrome\u4e2d\u4f7f\u7528XMLHttpRequest\u5728\u672c\u5730\u6587\u4ef6\u4e2d\u8fdb\u884c\u64cd\u4f5c
\nAWS API Gateway \u8de8\u57df\u901a\u4fe1<\/p>\n
\u4f7f\u7528XMLHttpRequest\u4f20\u9012\u53c2\u6570\u7684\u65b9\u6cd5<\/h3>\n
\u773c\u524d\u7684\u7a0b\u5f0f\u78bc<\/p>\n
request<\/span>.<\/span>send<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>item<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u904e\u53bb\u7684\u7a0b\u5f0f\u78bc\uff08\u767c\u751f\u932f\u8aa4\uff09<\/p>\n
request<\/span>.<\/span>send<\/span>(<\/span>item<\/span>)<\/span>\r\n<\/code><\/pre>\n
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\u7ed3\u675f<\/h2>\n
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\n\u5b8c\u6210\u8fd9\u4e2a\u4e4b\u540e\uff0c\u4e5f\u8bb8\u6211\u4f1a\u5c1d\u8bd5\u505a\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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