Express.js检查请求类型与.is（）不工作 [英] Express.js checking request type with .is() doesn't work

问题描述

我正在尝试检查内容的类型，但它似乎不起作用。这是shell的输出：

I'm trying to check what the type of content is, but it doesn't appear to be working. Here is the output on the shell:

$ node app.js
# Request http://localhost:3000 via browser
CLIENT DOES NOT WANT XML, JSON, OR HTML
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

这里是app.js脚本的内容：

And here is the contents of the app.js script:

var express = require('express');
var app = express.createServer();

app.get('/', function(req, res) {
    if (req.is('xml')) {
        console.log("CLIENT WANTS XML");
    } else if (req.is('json') || req.is('html')) {
        console.log("CLIENT WANTS JSON OR HTML");
    } else {
        console.log("CLIENT DOES NOT WANT XML, JSON, OR HTML");
        console.log(req.header('Accept'));
    }
});

app.listen(3000);

我希望 text / html 接受标题来触发 req.is（'html'）函数，甚至 application / xhtml + xml 接受标题触发 req.is（'xml'），但 else 语句实际上可以运行。我正在使用Express 3.0.0 rc1和Node 0.8.1。

I would expect the text/html Accept header to trigger the req.is('html') function or even the application/xhtml+xml Accept header to trigger the req.is('xml'), but the else statement actually gets run. I'm using Express 3.0.0 rc1 and Node 0.8.1.

推荐答案

原来我应该使用 .accepts（），而不是 .is（）。

Turns out I should be using .accepts(), instead of .is().

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