如何让 localhost 服务器在 node.js 中返回 JSON 而不是 HTML

Question

我收到以下错误：

SyntaxError: Unexpected token

我了解服务器正在返回 HTML，而客户端需要解析的 JSON。我正在使用本地主机服务器。如何让 localhost 服务器返回 JSON 而不是 HTML？

下面是我的代码：

// required modules
const https = require('https');

// json files link
const mimeURL = 'https://gist.github.com/AshHeskes/6038140#file-file-extension-to-mime-types-json';

const getMimeType = extension => {
    return new Promise((resolve, reject) => {
        https.get(mimeURL, response => {
            if(response.statusCode < 200 || response.statusCode > 299) {
                reject(`Error: Fail to load mime types json file: ${response.statusCode}`);
                console.log(`Error: Fail to load mime types json file: ${response.statusCode}`);
                return false;
            }

        let data = '';
        // receive data by chunks
    response.on('data', chunk => {
        data += chunk;
  });
//   once you received all chunks of data
      response.on('end', () => {
        resolve(JSON.parse(data)[extension]);
        });

    }).on('error', (e) => {
        console.error(e);
    });
});

};
module.exports = getMimeType;

Answer 1

您请求的 URL 不是 JSON，它是托管在 Github Gist 上的格式化元素。要获取原始 JSON，您需要单击 Gist 标题旁边的原始按钮：

向raw JSON URL 提出请求，它会起作用。

这是您特定案例的代码：

// required modules
const https = require('https');

// json files link
const mimeURL = 'https://gist.githubusercontent.com/AshHeskes/6038140/raw/27c8b1e28ce4c3aff0c0d8d3d7dbcb099a22c889/file-extension-to-mime-types.json';

const getMimeType = extension => {
    return new Promise((resolve, reject) => {
        https.get(mimeURL, response => {
            if(response.statusCode < 200 || response.statusCode > 299) {
                reject(`Error: Fail to load mime types json file: ${response.statusCode}`);
                console.log(`Error: Fail to load mime types json file: ${response.statusCode}`);
                return false;
            }

        let data = '';
        // receive data by chunks
    response.on('data', chunk => {
        data += chunk;
  });
//   once you received all chunks of data
      response.on('end', () => {
        resolve(JSON.parse(data)[extension]);
        });

    }).on('error', (e) => {
        console.error(e);
    });
});

};
module.exports = getMimeType;