使用HttpWebRequest将图片从C#上传到使用PUT方法的NodeJS Express

using System;
using System.IO;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        string imageUrl = "https://example.com/image.jpg"; // 图片的URL
        string apiEndpoint = "http://example.com/api/upload"; // NodeJS Express服务器的API端点

        // 读取图片文件为字节数组
        byte[] imageBytes;
        using (var webClient = new WebClient())
        {
            imageBytes = webClient.DownloadData(imageUrl);
        }

        // 创建HTTP请求对象
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(apiEndpoint);
        request.Method = "PUT";
        request.ContentType = "image/jpeg"; // 设置Content-Type为图片格式

        // 设置请求的主体内容和长度
        request.ContentLength = imageBytes.Length;
        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(imageBytes, 0, imageBytes.Length);
        }

        // 发送HTTP请求并获取响应
        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            // 处理响应
            if (response.StatusCode == HttpStatusCode.OK)
            {
                Console.WriteLine("图片上传成功！");
            }
            else
            {
                Console.WriteLine("图片上传失败！");
            }
        }
    }
}

const express = require('express');
const multer = require('multer');

const app = express();
const upload = multer({ dest: 'uploads/' }); // 指定保存上传文件的目录

app.put('/api/upload', upload.single('image'), (req, res) => {
  // 上传的图片保存在req.file中，可以根据需要进行处理
  console.log(req.file);

  res.sendStatus(200); // 返回上传成功的状态码
});

app.listen(3000, () => {
  console.log('Server started on port 3000');
});