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具有JSON.parse的JSON中位置0处的意外令牌<

[英]Unexpected token < in JSON at position 0 with JSON.parse

 原文  2019-06-09 15:29:43  1   1    javascript/ node.js/ json

问题描述

I am iterating through an object and making several requests with items in that object to an API, for fetching data & then sending it to a database. 我正在遍历一个对象，并对该对象的项目向API发出了几个请求，以获取数据并将其发送到数据库。 When receiving the data, I am using JSON.parse() to store the json in a variable and sending it to a callback where it is handled and will eventually be sent to a database. 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。

After researching this issue and seeing similar questions here on StackOverflow, I still cannot figure out my issue considering the data from the request is getting parsed fine, but I get the issue a couple minutes after I run my code. 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);
    });

After I console.log all the data I get (which is being somewhat parsed correctly considering its being logged), the console gives me the Unexpected token < in JSON at position 0 error a couple minutes after I have ran my code. 在我console.log获得的所有数据后（考虑到已记录的数据，它已经被正确解析），控制台在运行代码后几分钟，在JSON位置0向我提供了Unexpected令牌<错误。 When I console.log(player), there are no issues and there is an object that is logged for each player. 当我console.log（player）时，没有问题，并且为每个玩家记录了一个对象。

NOTE: I have created another account for this API so that others can test this issue with a authorization id that is not my actual authorization id. 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测试此问题。

Error from passing body through callback function and logging it. 通过回调函数传递主体并将其记录下来时出错。 

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<h2>What happened?</h2>
<p>The origin web server timed out responding to this request.</p>
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<h5>If you're a visitor of this website:</h5>
<p>Please try again in a few minutes.</p>
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<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>
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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 个解决方案

解决方案1
 1  2019-06-09 15:47:58

In your request options, rather than setting the header, you could do: 在您的请求选项中，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);
    });
}

That will automatically convert the response to a JSON object, so you won't have to use JSON.parse . 它将自动将响应转换为JSON对象，因此您不必使用JSON.parse 。

If you still see the same error message, then that would mean there's some problem with the response being returned. 如果仍然看到相同的错误消息，则意味着返回响应存在一些问题。 In that case, post the body or response so we can help. 在这种情况下，请张贴body或回应，以便我们提供帮助。

Based on your edit : 根据您的编辑 ：

You're getting an error page from Cloudflare, which is obviously not valid JSON. 您从Cloudflare收到了一个错误页面，该页面显然不是有效的JSON。 So your problem is not JSON parsing, it's the URL you are requesting is incorrect, or you're being rate-limited/blocked. 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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