Facebook Graph API 如何在 node.js 中上传图片？

Question

我正在尝试遵循此指南：

https://developers.facebook.com/docs/graph-api/resumable-upload-api

在研究了如何附加 multipart/form-data 之后，按照指南中的建议，我想出了这个代码：

    const FB = require("fb")
    const fs = Npm.require("fs")

    FB.setAccessToken(accesstoken)

    const post = async () => {
        let res = await FB.api("app/uploads", "post", {
            file_type: "image/jpeg",
            file_length: file_length,
        })
        if (!res || res.error) {
            console.log(!res ? "error occurred" : res.error)
            return
        }
        const http = require("http")
        const FormData = require("form-data")

        const form = new FormData()
        const readStream = fs.createReadStream(imagepath)
        form.append("file", readStream)

        const req = http.request({
            host: "graph.facebook.com",
            headers: {
                Authorization:
                    "OAuth accesstoken",
                file_offset: 0,
                Connection: "close",
                ...form.getHeaders(),
            },
            method: "POST",
            path: "/" + res.id,
        })

        form.pipe(req, { end: true })

        req.on("response", function (res) {
            console.log(res)
        })

        return res
    }

我想获取上传的文件句柄，但我在响应中得到的只是一个巨大的对象，它是这样开始的（状态码为 200）：

IncomingMessage {
  _readableState: ReadableState {
    objectMode: false,
    highWaterMark: 16384,
    buffer: BufferList { head: null, tail: null, length: 0 },
    length: 0,
    pipes: null,
    pipesCount: 0,
    flowing: null, ...

我做错了什么？可能是我附加文件的方式。该指南没有说明给它起什么名字，所以我只是将它命名为“文件”。

非常感谢任何帮助。

Answer 1

我想出来了，虽然它可能不是最优的：

    const FB = require("fb")
    const fs = Npm.require("fs")

    FB.setAccessToken(accessToken)

    let post = async () => {
        let res = await FB.api("app/uploads", "post", {
            file_type: "image/jpeg",
            file_length: file_length,
        })
        if (!res || res.error) {
            console.log(!res ? "error occurred" : res.error)
            return
        }
        
        const request = require("request")

        request.post({
            url: "http://graph.facebook.com/" + res.id,
            formData: {
                source: {
                    value: fs.createReadStream(imagePath),
                    options: {
                        filename: filename,
                        contentType: "image/jpeg",
                    },
                },
            },
            headers: {
                Authorization:
                    "OAuth AccessToken",
                file_offset: 0,
                Connection: "close",
                'content-type' : 'multipart/form-data'
            }
        },
        function (err, resp, body) {
            if (err) {
                console.log("Error!")
            } else {
                console.log("URL: " + body)
            }
        })

        return res
    }

    return post()

Facebook Graph API 如何在 node.js 中上传图片？

Facebook Graph API how to upload image in node.js?

upload

image

node.js

facebook-graph-api