通过要求（“http”）请求将图像作为二进制发送到远程服务器 [英] Sending image as binary via require("http") request to a remote server

问题描述

我正在尝试从nodejs服务器向远程服务器发送图像。这是目前为止的请求格式。

注意：就像邮递员中的二进制请求并选择文件并发送一样）

 功能上传（选项，正文）{
 body = body || ; 
返回新的Promise（函数（解析，拒绝）{
 const https = require（'https'）; 
 https.request（options，function（response）{
 var body = []; 
 response.on（'data'，function（chunk）{
 body.push（chunk）; 
}）; 
 response.on（'end' ，function（）{
 resolve（JSON.parse（Buffer.concat（body）.toString（）））
}）; 
}）。on（'error'，function（error） ）{
拒绝（错误）; 
}）。结束（正文）; 
}）; 
} 
  

---

使用：

  var options = {
 hostname：hostname，
 path：/上传，
端口：443，
方法：'PUT'，
标题：{
'接受'：'application / json'，
'Content-Type '：'image / png'
} 
}; 
 
 fs.readFile（'./ img / thumbnail.png'，函数（错误，数据）{
 options.body = data; 
 upload（options）.then（ ... 
}）; 
  

解决方案

我想你只想要这个：

  fs.createReadStream（'。/ img / thumbnail.png'）。pipe（https。 request（{
 hostname：'hostname'，
 path：'/ upload'，
 method：'PUT'，
 headers：{
 Accept：'application / json'，
'Content-Type'：'image / png'，
} 
}，function（response）{...}））; 
  

您的代码的问题在于您将正文放入选项。正文，但根据文档，它看起来不像比如有任何这样的选择。

I'm trying to send an image to remote server from nodejs server. Here's the request format so far.

Note: Just like binary request in postman and choosing a file and sending)

function upload(options, body) {
    body = body || '';
    return new Promise(function(resolve, reject){
        const https = require('https');
        https.request(options, function(response) {
            var body = [];
            response.on('data', function(chunk) {
                body.push(chunk);
            });
            response.on('end', function(){
                resolve(JSON.parse(Buffer.concat(body).toString()))
            });
        }).on('error', function(error) {
            reject(error);
        }).end(body);
    });
}

---

Use:

var options = {
    hostname: "hostname",
    path: "/upload",
    port: 443,
    method: 'PUT',
    headers: {
        'Accept': 'application/json',
        'Content-Type': 'image/png'
    }
};

fs.readFile('./img/thumbnail.png', function(error, data) {
     options.body = data;
     upload(options).then(...
});

Edit 2

After several attempts, came across an efficient strategy to upload images via streams, here's how it looks like but still not success.

const https = require('https');
var request = https.request(options, function(response) {
    var buffers = [];
    response.on('data', function(chunk) {
        buffers.push(chunk);
    });
    response.on('end', function(){
        console.log(response.headers['content-type']);
        var body = JSON.parse(buffers.length ? Buffer.concat(buffers).toString() : '""');
        response.statusCode >= 200 && response.statusCode < 300 ? resolve(body) : reject(body);
    });
}).on('error', function(error) {
    reject(error);
});

const fs = require('fs');
var readStream = fs.ReadStream(body.path);
readStream.pipe(request);
readStream.on('close', function(){
    request.end();
});

Reference

解决方案

I think you just want this:

fs.createReadStream('./img/thumbnail.png').pipe(https.request({
  hostname: 'hostname',
  path: '/upload',
  method: 'PUT',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'image/png',
  }
}, function (response) { ... }));

The issue with your code is that you were putting the body into options.body, but per the documentation, it doesn't look like there is any such option.

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