下面的一些javascript可以很好地做到这一点：

var options = {
        uri: uri,
        encoding: null
    };
    request(options, function(error, response, body) {
        if (error || response.statusCode !== 200) { 
            console.log("failed to get image");
            console.log(error);
        } else {
            s3.putObject({
                Body: body,
                Key: path,
                Bucket: 'bucket_name'
            }, function(error, data) { 
                if (error) {
                    console.log("error downloading image to s3");
                } else {
                    console.log("success uploading to s3");
                }
            }); 
        }   
    });

这就是我所做的，效果很好：

const request = require('request-promise')
const AWS = require('aws-sdk')
const s3 = new AWS.S3()

const options = {
    uri: uri,
    encoding: null
};

async load() {

  const body = await request(options)
  
  const uploadResult = await s3.upload({
    Bucket: 'bucket_name',
    Key   : path,
    Body  : body,   
  }).promise()
  
}

像这样的事情怎么样：

const stream = require('stream');
const request = require('request');
const s3 = new AWS.S3()

const pass = new stream.PassThrough();

request(url).pipe(pass);

s3.upload({
    Bucket: 'bucket_name',
    Key: path,
    Body: pass,
});

你可以像这样用Axios实现。请参考这篇文章以获得更多信息。

const axios = require("axios");
const AWS = require("aws-sdk");
const { PassThrough } = require("stream");

const s3 = new AWS.S3({
  accessKeyId: "accessKeyId",
  secretAccessKey: "accessKey",
  region: "region",
});

const bucket = "BucketName";
const key = "key";

const uploadToS3 = async (bucket, key) => {
  try {
    const stream = await axios.get(url, { responseType: "stream" });

    const passThrough = new PassThrough();

    const response = s3.upload({ Bucket: bucket, Key: key, Body: passThrough });

    stream.data.pipe(passThrough);

    return response.then((data) => data.Location).catch((e) => console.error(e));
  } catch (error) {
    console.error(error);
  }
};

uploadToS3(bucket, key);

import axios from "axios";
import aws from 'aws-sdk'
import crypto from 'crypto'

const s3 = new aws.S3();

export const urlToS3 = async ({ url, bucket = "rememoio-users", key = Date.now() + crypto.randomBytes(8).toString('hex') + ".png" }) => {
  try {
    const { data } = await axios.get(url, { responseType: "stream" });

    const upload = await s3.upload({
      Bucket: bucket,
      ACL: 'public-read',
      Key: key,
      Body: data,
    }).promise();

    return upload.Location;
  } catch (error) {
    console.error(error);
    throw new Error;
  }
};

使用fetch：

//fetch image from url
const imageResp = await fetch(
    '<image url>'
)
// transform to arrayBuffer
const imageBinaryBuffer = Buffer.from(await imageResp.arrayBuffer())
//get image type
const imageType = imageName.toLowerCase().includes(".png")
    ? "image/png"
    : "image/jpg";

//get presigned url and data [this can be different on your end]
const presignedResponse = await getPresignedURL(imageBinaryBuffer, imageName, imageType)

const s3Result = presignedResponse.data
// build the formData 
let formData = new FormData()
Object.keys(s3Result.fields).forEach(key => {
    formData.append(key, s3Result.fields[key]);
});
formData.append("file", imageBinaryBuffer);

const s3resp = await fetch(s3Result.url, {
    method: "POST",
    body: formData,
});

return s3resp.headers.location