使用JSON.parse

时间：2019-06-09 15:29:43

标签： javascript node.js json

我正在遍历一个对象，并向该API发出多个对该对象中的项目的请求，以获取数据并将其发送到数据库。接收数据时，我正在使用JSON.parse（）将json存储在变量中，然后将其发送到回调中，在该回调中进行处理并将最终将其发送到数据库。

在研究了这个问题并在StackOverflow上看到了类似的问题之后，考虑到请求中的数据已被很好地解析，我仍然无法弄清楚我的问题，但是在运行代码几分钟后，我遇到了这个问题。 

async.forEach(players, function(item, callback) {

        var playerAccountId = (item.accountId).replace(/-/gi, '');
        var kills = item.kills;
        var placement = item.placement;

        let options = {
            url: "https://fortnite-api.theapinetwork.com/prod09/users/public/br_stats_v2?user_id=" + playerAccountId,
            method: 'GET',
            headers: {
                'content-type': 'application/json',
                'Authorization' : 'c825697ee0b871c684332601b46c2b71'
            }
        };

    // -------------------- //

        function requestData(callback) {
            request(options, function(err, res, body) {
                body = body.trim();
                let json = JSON.parse(body);
                let username = json.data.username;
                return callback(username);

            });
        }

        function doSomething(name) { //Send data directly to database from this callback
            //console.log(name);

            var player = {
                "Name": name,
                "Account ID": playerAccountId,
                "Kills": kills,
                "Placement": placement
            }
            console.log(player);

        }
        requestData(doSomething);
    });

在我console.log获得的所有数据之后（考虑到已记录的数据，它已经被正确解析），控制台在我运行代码后几分钟，在JSON位置0给我Unexpected token <错误标记<错误。当我console.log（player）时，没有问题，并且为每个玩家记录了一个对象。

注意：我已经为此API创建了另一个帐户，以便其他人可以使用不是我的实际授权ID的授权ID来测试此问题。

通过回调函数传递正文并将其记录下来的错误。 

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<h1>
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<small class="heading-ray-id">Ray ID: 4e465e6118edcce2 &bull; 2019-06-09 22:00:24 UTC</small>
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<h2 class="cf-subheadline">A timeout occurred</h2>
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<h2>What happened?</h2>
<p>The origin web server timed out responding to this request.</p>
</div>
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<h2>What can I do?</h2>
<h5>If you're a visitor of this website:</h5>
<p>Please try again in a few minutes.</p>
<h5>If you're the owner of this website:</h5>
<p><span>The connection to the origin web server was made, but the origin web server timed out before responding. The likely cause is an overloaded background task, database or application, stressing the resources on your web server. To resolve, please work with your hosting provider or web development team to free up resources for your database or overloaded application.</span> <a href="https://support.cloudflare.com/hc/en-us/articles/200171926-Error-524">Additional troubleshooting information here.</a></p>
</div>
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<p>
<span class="cf-footer-item">Cloudflare Ray ID: <strong>4e465e6118edcce2</strong></span>
<span class="cf-footer-separator">&bull;</span>
<span class="cf-footer-item"><span>Your IP</span>: 173.54.204.123</span>
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1 个答案:

答案 0 :(得分：1)

在请求选项中，您可以执行以下操作，而不是设置标题：

// add `json: true`, and moved the query string to `qs` to automatically encode
let options = {
    url: "https://fortnite-api.theapinetwork.com/prod09/users/public/br_stats_v2",
    qs: {
        user_id: playerAccountId
    },
    method: 'GET',
    json: true, // add this
    headers: {
        'Authorization' : 'c825697ee0b871c684332601b46c2b71'
    }
};

// removed json parsing and trimming.
function requestData(callback) {
    request(options, function(err, res, body) {
        let username = body.data.username;
        return callback(username);
    });
}

这将自动将响应转换为JSON对象，因此您不必使用JSON.parse。

如果您仍然看到相同的错误消息，则表明返回响应存在一些问题。在这种情况下，请发布body或回复，以便我们提供帮助。

基于您的修改：

您从Cloudflare得到了一个错误页面，该页面显然不是有效的JSON。因此，您的问题不是JSON解析，而是您请求的URL不正确，或者您受到速率限制/阻止。

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