使用 Node.js、Express 和 Mongoose 上传图片 [英] Uploading images using Node.js, Express, and Mongoose

问题描述

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由于许多新的 Node.js 库很快就会过时，而且示例相对较少，因此我想询问有关使用以下方法上传图像的问题:

Since many new Node.js libraries are quickly being rendered obsolete and there are relatively few examples anyways I want to ask about uploading images using:

• Node.js (v0.4.1)
• Express (1.0.7)
• 猫鼬 (1.1.0).

其他人是如何做到的?

我发现:node-formidable，但我一般不熟悉上传图片所以我想学习使用 Node.js 和 Express 的一般知识和方法.

I've found: node-formidable, but I am new to uploading images in general so I want to learn general stuff and ways of doing so using Node.js and Express.

推荐答案

我将第一次回答我自己的问题.我直接从源代码中找到了一个示例.请原谅可怜的缩进.我不确定在复制和粘贴时如何正确缩进.代码直接来自 Express multipart/form-data 示例.

I'll answer my own question for the first time. I found an example straight from the source. Please forgive the poor indentation. I wasn't sure how to indent properly when copying and pasting. The code comes straight from Express multipart/form-data example on GitHub.

// Expose modules in ./support for demo purposes
require.paths.unshift(__dirname + '/../../support');

/**
 * Module dependencies.
 */

var express = require('../../lib/express')
  , form = require('connect-form');

var app = express.createServer(
  // connect-form (http://github.com/visionmedia/connect-form)
  // middleware uses the formidable middleware to parse urlencoded
  // and multipart form data
  form({ keepExtensions: true })
);

app.get('/', function(req, res){
  res.send('<form method="post" enctype="multipart/form-data">'
    + '<p>Image: <input type="file" name="image" /></p>'
    + '<p><input type="submit" value="Upload" /></p>'
    + '</form>');
});

app.post('/', function(req, res, next){

  // connect-form adds the req.form object
  // we can (optionally) define onComplete, passing
  // the exception (if any) fields parsed, and files parsed
  req.form.complete(function(err, fields, files){
    if (err) {
      next(err);
    } else {
      console.log('
uploaded %s to %s'
        ,  files.image.filename
        , files.image.path);
      res.redirect('back');
    }
  });

  // We can add listeners for several form
  // events such as "progress"
  req.form.on('progress', function(bytesReceived, bytesExpected){
    var percent = (bytesReceived / bytesExpected * 100) | 0;
    process.stdout.write('Uploading: %' + percent + '
');
  });
});

app.listen(3000);
console.log('Express app started on port 3000');

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