如何使用Google Apps脚本登录外部网站？

Question

我正在尝试登录一个网站，这样我就可以将数据返回到Google docs电子表格。我在这里读过各种帖子，但我不知道如何识别我需要传递的数据。

该站点的登录页面有一个表单，其中包含以下字段。

<form action="https://fantasyfootball.telegraph.co.uk/premierleague/log-in/" method="post" id='reg-form'>
        <fieldset class='login'>

            <div class="required">
                <label for="email">Email:</label>
                <input type="text" name="email" id="email" class="input-text" size="10" maxlength="50" value="my.name@address.com" />
            </div>

            <div class="required">
                <label for="pass">Password:</label>
                <input type="password" name="pass" id="pass" class="input-password" size="10" maxlength="15" value="some-password" />
            </div>
        </fieldset>
        <div id="remember-me-container">
                <input type="checkbox" checked="checked" id="remember-me" name="remember-me" value="remember-me" />
                <label for="remember-me" id="remember-lbl">Remember me</label>

        </div>

        <input type="submit" id="submit-btn" value="Login" name='Submit' class='btn'/>
    </form>

我尝试过以下脚本，但sessionDetails总是返回“未定义”的内容。

// Returns the html of the page.
function sGetPage (sUrl) {

var url = "https://fantasyfootball.telegraph.co.uk/premierleague/log-in/";

// logging in, following http://stackoverflow.com/questions/21621019/google-apps-script-login-to-website-with-http-request
var payload =
{
 "email" : "ian.shaw@iee.org",
 "pass" : "asdf123",
 "submit-btn": "Login",
 "remember-me" : "remember-me" 
};

var options =
{
 "method" : "post",
 "payload" : payload,
 "followRedirects" : false
};

var login = UrlFetchApp.fetch( url, options);
var sessionDetails = login.getAllHeaders()['Set-Cookie'];
Logger.log(sessionDetails); 

var response = UrlFetchApp.fetch ("https://fantasyfootball.telegraph.co.uk/premierleague/leagues/view/8000912/4015677/", {"headers" : {"Cookie" : sessionDetails} });
var sHtml = response.getContentText();
Logger.log(sHtml); 

}

任何建议都将不胜感激。

Answer 1

我从未能够将sessionDetails按原样发送回站点。我一直在使用RegEx提取sessionDetails的相关部分，并创建一个新的cookie字符串，然后将其发送回站点。要找出cookie的哪些部分是相关的，请使用浏览器的网络日志(在开发人员工具中)检查浏览器为cookie发布的内容，并将该字符串与sessionDetails进行比较。我发布了一个示例here。

var login = UrlFetchApp.fetch(url, options);
var sessionDetails = login.getAllHeaders()['Set-Cookie'];
Logger.log(sessionDetails); 
var cookie = sessionDetails.match(/Asp\.NetSessionId=[A-Z0-9]+;/)[0];  //modify this RegEx as needed

var response = UrlFetchApp.fetch(
  "https://example.com",
  {"headers" : {"Cookie" : cookie} }
);