如何使用Express / Node.js访问Amazon SNS文章 [英] How do you access an Amazon SNS post body with Express / Node.js

问题描述

我正在在 Express 框架之上的Node.js中重建PHP应用程序。

I'm in the process of rebuilding a PHP app in Node.js on top of the Express framework.

应用程序的一部分是 Amazon SNS通知发布到的回调URL。

One part of the application is a callback url that an Amazon SNS notification is posted to.

来自SNS的POST正文目前以PHP（以下方式）读取：

The POST body from SNS is currently read in the following way in PHP (which works):

$notification = json_decode(file_get_contents('php://input'));

在Express中，我尝试了以下内容：

In Express I have tried the following:

app.post('/notification/url', function(req, res) {
    console.log(req.body);
});

但是，观看控制台时，只有在发布信息时才记录以下内容：

However, watching the console, this only logs the following when the post is made:

{}

所以，重复一个问题：如何使用Express / Node.js访问Amazon SNS文章主体

So, to repeat the question: How do you access an Amazon SNS post body with Express / Node.js

推荐答案

另一种方法将修复 Content-Type 标题。

Another approach would be to fix the Content-Type header.

这里是中间件代码：

exports.overrideContentType = function(){
  return function(req, res, next) {
    if (req.headers['x-amz-sns-message-type']) {
        req.headers['content-type'] = 'application/json;charset=UTF-8';
    }
    next();
  };
}

这假设有一个名为 util.js的文件 位于根项目目录中：

This assumes there is a file called util.js located in the root project directory with:

util = require('./util');

通过包括：

app.use(util.overrideContentType());

BEFORE

app.use(express.bodyParser());

这允许bodyParser（）正确地解析正文...

in the app.js file. This allows bodyParser() to parse the body properly...

较少干扰，然后您可以访问 req.body 正常。

Less intrusive and you can then access req.body normally.

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