javascript - Azure 函数 blob 输出绑定(bind)路径参数 (javascript)

Question

我花了很多时间，但没有找到任何关于如何从Azure函数设置blob路径的路径参数的javascript示例或文档。如何从函数内部设置 "path": "randomnum-container/{filename}" 的 {filename} ？

function.json

{
  "bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get"
      ]
    },
    {
      "type": "http",
      "direction": "out",
      "name": "res"
    },
    {
      "type": "blob",
      "name": "outputBlob",
      "path": "randomnum-container/{filename}",
      "connection": "randomnum_STORAGE",
      "direction": "out"
    }
  ],
  "disabled": false
}

index.js

module.exports = async function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');
    const max = 100;
    const num = Math.floor(Math.random() * Math.floor(max));
    // how to set outputBlob {filename} parameter?
    // let's say I want to save every request to {num}.txt
    context.res = {
        status: 200,
        body: {
            "number": num
        }
    }
};

Answer 1

因为nodejs函数不支持绑定(bind)容器，所以如果你想绑定(bind)动态blob，你必须在函数运行之前定义它。

并且您正在使用HTTP触发器功能，因此您可以在请求中定义blob名称。以下是我的功能。

我的function.json:

{
  "bindings": [
    {
      "authLevel": "function",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get",
        "post"
      ]
    },
    {
      "type": "http",
      "direction": "out",
      "name": "res"
    },{
      "name": "outputblob",
      "type": "blob",
      "path": "outputcontainer/{outblobname}",
      "connection": "AzureWebJobsStorage",
      "direction": "out"
    }
  ]
}

index.js:

module.exports = async function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');

    context.bindings.outputblob = "test string";
    context.done();


    if (req.query.name || (req.body && req.body.name)) {
        context.res = {
            // status: 200, /* Defaults to 200 */
            body: "Hello " + (req.query.name || req.body.name)
        };
    }
    else {
        context.res = {
            status: 400,
            body: "Please pass a name on the query string or in the request body"
        };
    }
};

然后在 postman 中，我发送以下 json 数据，发送请求，该函数会将 blob 与 001.txt 绑定(bind)。

{
"outblobname":"001.txt"
}