Node-LinkedIn模块返回“未知身份验证方案”

Question

我正在使用node-linkedin npm包来验证和读取来自其他用户的信息（名称，职位，公司名称，个人资料照片，共享连接）。我可以正确地接收和存储访问令牌（在我自己的LinkedIn配置文件的已批准应用和控制台中验证令牌），但我无法返回任何请求的信息。我的调用是从包文档复制和粘贴的，但它返回以下内容：

2018-02-28T03:46:53.459839+00:00 app[web.1]: { errorCode: 0,
2018-02-28T03:46:53.459843+00:00 app[web.1]:   message: 'Unknown authentication scheme',
2018-02-28T03:46:53.459845+00:00 app[web.1]:   requestId: '3B55EVY7XQ',
2018-02-28T03:46:53.459847+00:00 app[web.1]:   status: 401,
2018-02-28T03:46:53.459848+00:00 app[web.1]:   timestamp: 1519789613443 }

我在下面列出了我的路线。仅仅为了测试的目的，myToken和linkedin是linkedin-controller范围的服务器端全局变量。（我知道这需要改变最终产品，这是一个学生项目。）

app.get('/companies', function (req, res) {
    console.log(linkedin.connections.config.accessToken);
    linkedin.companies_search.name('facebook', 1, function(err, company) {
        console.log('Merpy merpy mc merpers'
            ,company);
        // name = company.companies.values[0].name;
        // desc = company.companies.values[0].description;
        // industry = company.companies.values[0].industries.values[0].name;
        // city = company.companies.values[0].locations.values[0].address.city;
        // websiteUrl = company.companies.values[0].websiteUrl;
        res.redirect("/");
    });
});

app.get('/companies2', function (req, res) {
    linkedin.companies.company('162479', function(err, company) {
        console.log(company);
        res.redirect("/");
    });
});

app.get('/connections', function (req, res) {
    linkedin.connections.retrieve(function(err, connections) {
        console.log(connections);
        res.redirect("/");
    });
});

这是我的授权码，似乎有效：

    app.get('/auth', function (req, res) {
    // This is the redirect URI which linkedin will call to and provide state and code to verify
    /**
     *
     * Attached to the redirect_uri will be two important URL arguments that you need to read from the request:

     code — The OAuth 2.0 authorization code.
     state — A value used to test for possible CSRF attacks.
     */

    //TODO: validate state here to secure against CSRF
    var error = req.query.error;
    var error_description = req.query.error_description;
    var state = req.query.state;
    var code = req.query.code;
    if (error) {
        next(new Error(error));
    }
    /**
     *
     * The code is a value that you will exchange with LinkedIn for an actual OAuth 2.0 access
     * token in the next step of the authentcation process.  For security reasons, the authorization code
     * has a very short lifespan and must be used within moments of receiving it - before it expires and
     * you need to repeat all of the previous steps to request another.
     */
    //once the code is received handshake back with linkedin to send over the secret key
    handshake(req.query.code, res);
});

function handshake(code, ores) {

    //set all required post parameters
    var data = querystring.stringify({
        grant_type: "authorization_code",
        code: code,
        redirect_uri: OauthParams.redirect_uri,//should match as in Linkedin application setup
        client_id: OauthParams.client_id,
        client_secret: OauthParams.client_secret// the secret
    });

    var options = {
        host: 'www.linkedin.com',
        path: '/oauth/v2/accessToken',
        protocol: 'https:',
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Content-Length': Buffer.byteLength(data)
        }
    };

    var req = http.request(options, function (res) {
        var data = '';
        res.setEncoding('utf8');
        res.on('data', function (chunk) {
            data += chunk;

        });
        res.on('end', function () {
            //once the access token is received store it
            myToken = JSON.parse(data);
            linkedin = Linkedin.init(myToken);
            ores.redirect("/");
        });
        req.on('error', function (e) {
            console.log("problem with request: " + e.message);
        });

    });
    req.write(data);
    req.end();
}

在我的故障排除研究中，似乎我需要将令牌传递给请求;但是，我无法在包装中找到任何地方或任何方式。并且随着包的每日下载量的增加，我不可能是唯一遇到此错误的人。 GitHub的作者问题部分没有帮助，其他搜索此包的错误也是如此。

我的部署：https://linkedin-api-test.herokuapp.com/

（访问部署时，在根据路由手动更改uri之前，必须单击蓝色的“想连接到LinkedIn？”链接。结果也只会显示在Heroku日志中，这很可能对您无益它本来应该是一个简单的测试，所以我只是偷走了之前项目的前端。）

我的回购：https://github.com/SteveSonoa/LinkedIn-Test

node-linkedin文档：https://github.com/ArkeologeN/node-linkedin/blob/master/README.md

这是我第一个无法找到答案的问题;如果我在询问时遗漏了任何重要内容，我会道歉。预先感谢您的任何帮助！