Question

我正在尝试使用本教程（https://codeforgeek.com/2016/03/google-recaptcha-node-js-tutorial/）设置google recaptcha，并将recaptcha代码移动到它自己的模块中。我明白了：

TypeError: res.json is not a function

我尝试这段代码时在控制台中

：

var checkRecaptcha = function(req, res){
    // g-recaptcha-response is the key that browser will generate upon form submit.
    // if its blank or null means user has not selected the captcha, so return the error.

    if(req.body['g-recaptcha-response'] === undefined || req.body['g-recaptcha-response'] === '' || req.body['g-recaptcha-response'] === null) {
        return res.json({"responseCode" : 1,"responseDesc" : "Please select captcha"});
    }

    // Put your secret key here.
    var secretKey = "************";

    // req.connection.remoteAddress will provide IP address of connected user.
    var verificationUrl = "https://www.google.com/recaptcha/api/siteverify?secret=" + secretKey + "&response=" + req.body['g-recaptcha-response'] + "&remoteip=" + req.connection.remoteAddress;

    // Hitting GET request to the URL, Google will respond with success or error scenario.
    var request = require('request');
    request(verificationUrl,function(error,response,body) {

        body = JSON.parse(body);
        // Success will be true or false depending upon captcha validation.
        if(body.success !== undefined && !body.success) {
            return res.json({"responseCode" : 1,"responseDesc" : "Failed captcha verification"});
        }
        return res.json({"responseCode" : 0,"responseDesc" : "Sucess"});
    });
}

module.exports = {checkRecaptcha};

为什么会这样？我在我的app.js中设置了app.use(bodyParser.json());，res.json()似乎在我的应用的其他部分工作正常，而不是这个重新接收模块。

Answer 1

根据您对中间件的使用情况，您没有将res传递给函数，而是回调（而checkRecaptcha()没有回调参数，因为它直接响应请求）。

请改为尝试：

app.post('/login', function(req, res) {
  var recaptcha = require('./recaptcha');
  recaptcha.checkRecaptcha(req, res);
});

或更简单：

app.post('/login', require('./recaptcha'));

res.json不是Node.js模块中的函数

1 个答案: