如何批量获取远程图片并显示出来？

当我请求远程图片的时候用createWriteStream单个请求没问题，，请求多了，就会出现延迟加载，，谁有更好的方法啊?贴上我的代码.我用的是ruby coffeescript的语法.

request = require 'superagent'
request
        .get('mp.weixin.qq.com/cgi-bin/getheadimg?fakeid=' + options.takeid)
        .set('Cookie', cookie)
        .end (res) ->
          filename = __basename + '/public/avatar/'+options.takeid+'.jpg'
          f = fs.createWriteStream(filename,
            flags: "w"
            encoding: "binary"
          )
          res.on "data", (data) ->
            f.write data
            options.res.write data

          res.on "end", (data) ->
            f.end()
            options.res.end()

zhihuzeye 1楼•12 年前

可不可以不用fs，直接显示?

var getHeadImage = function (takeid, cookie) {
  return function (request, response, next) {
    var url = 'mp.weixin.qq.com/cgi-bin/getheadimg?fakeid=' + takeid;
    var output = function (res) {
      var image = '';
      res.setEncoding('binary');
      res.on('data', function (chunk) {
        image += res.statusCode == 200 ? chunk : "";
      });
      res.on('end', function () {
        response.writeHead(200, {
          'Content-type': res.headers['content-type']
        });
        response.write(image, 'binary');
        response.end();
      });
    };
    superagent.get(url).set('Cookie', cookie).end(output);
  }
};