Moleculer Framework API代码无法使用请求体(form-data)中的文件。返回undefined。

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英文:

Moleculer Framework API code is not able to use the file from request body (form-data). returns undefined

问题

I am new to the Moleculer framework and need to upload a file from an API request body to MongoDB using an action handler. I have been able to upload files using Multer with Express, but I need to use only the Moleculer framework. When I run the action handler, the "req" parameter doesn't take the file from the request body and it's always undefined. I need help finding a way to make the file come to the action handler.

(https://i.stack.imgur.com/Xv7YP.png)

actions: {
    create: {
        rest: "POST /",
        async handler(ctx) {
            try {
                console.log("Params are: " + ctx.params.file);
                console.log("Meta is: " + ctx.meta.file);
                console.log("File is: " + ctx.file);
            } catch(err) {
                console.log("Error: " + err);
            }
        }
    },
},
英文:

I am new to the Moleculer framework and need to upload a file from an API request body to MongoDB using an action handler. I have been able to upload files using Multer with Express, but I need to use only the Moleculer framework. When I run the action handler, the "req" parameter doesn't take the file from the request body and it's always undefined. I need help finding a way to make the file come to the action handler.

(https://i.stack.imgur.com/Xv7YP.png)

actions: {
	create: {
		rest: "POST /",
		async handler(ctx) {
			try {
				console.log("Params are: " + ctx.params.file);
				console.log("Meta is: " + ctx.meta.file);
				console.log("File is: " + ctx.file);
			} catch(err) {
				console.log("Error: " + err);
			}
		}
	},
},

答案1

得分: 0

文件上传在操作中作为流处理,但应在路由设置中进行配置。您可以在文档中找到相关信息:https://moleculer.services/docs/0.14/moleculer-web.html#File-upload-aliases

例如:

module.exports = {
    mixins: [ApiGateway],
    settings: {
        path: "/upload",

        routes: [
            {
                path: "",

                aliases: {
                    // 从HTML多部分表单上传文件
                    "POST /": "multipart:file.save",
                    
                    // 从AJAX或cURL上传文件
                    "PUT /:id": "stream:file.save",

                    // 从HTML表单上传文件并覆盖busboy配置
                    "POST /multi": {
                        type: "multipart",
                        // 操作级别的busboy配置
                        busboyConfig: {
                            limits: { files: 3 }
                        },
                        action: "file.save"
                    }
                },

                // 路由级别的busboy配置。
                // 更多信息:https://github.com/mscdex/busboy#busboy-methods
                busboyConfig: {
                    limits: { files: 1 }
                    // 可以定义限制事件处理程序
                    // `onPartsLimit`, `onFilesLimit`或`onFieldsLimit`
                },

                mappingPolicy: "restrict"
            }
        ]
    }
});
英文:

The file upload is handled as a Stream in actions, but you should configure it in the route settings. In the documentation you can find information about it: https://moleculer.services/docs/0.14/moleculer-web.html#File-upload-aliases

E.g:

module.exports = {
    mixins: [ApiGateway],
    settings: {
        path: "/upload",

        routes: [
            {
                path: "",

                aliases: {
                    // File upload from HTML multipart form
                    "POST /": "multipart:file.save",
                    
                    // File upload from AJAX or cURL
                    "PUT /:id": "stream:file.save",

                    // File upload from HTML form and overwrite busboy config
                    "POST /multi": {
                        type: "multipart",
                        // Action level busboy config
                        busboyConfig: {
                            limits: { files: 3 }
                        },
                        action: "file.save"
                    }
                },

                // Route level busboy config.
                // More info: https://github.com/mscdex/busboy#busboy-methods
                busboyConfig: {
                    limits: { files: 1 }
                    // Can be defined limit event handlers
                    // `onPartsLimit`, `onFilesLimit` or `onFieldsLimit`
                },

                mappingPolicy: "restrict"
            }
        ]
    }
});

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  • 本文由 发表于 2023年6月16日 01:07:10
  • 转载请务必保留本文链接:https://go.coder-hub.com/76483985.html
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