Question

我的目标是使用Google云功能将发帖请求的结果插入到bigquery中。

我的问题是云函数正在将空值插入到我的表中，因此它无法从发布请求中获取参数。

这是我的帖子请求：

<script>
var event_category = 'action';
var event_name = 'click';
var page_url = 'test'
var request = new XMLHttpRequest();
request.open('POST', 'url to my cloud function');
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
        params = {
              event_category: event_category, 
              event_name: event_name, 
              page_url: page_url
              } 
request.send( JSON.stringify(params));
console.log(JSON.stringify(params));
</script>

Google云功能的代码

const bigquery = require('@google-cloud/bigquery')();
var result = "";

function insertHandler(err, apiResponse) {
  result.writeHead("204",
   "No Content",
   {
     "access-control-allow-origin": "urlofmywebsite",
     "access-control-allow-methods": "GET, POST, OPTIONS",
     "access-control-allow-headers": "content-type, accept",
     "access-control-max-age": 10, // Seconds.
     "content-length": 0
   }
);
return(result.end());
}


exports.loadBQ = function loadBQ (req, res) {
  result = res;
  var dataset = bigquery.dataset("google_analytics_test"); 
  var table = dataset.table("google_tag_manager"); 
  var event_category;
  var event_name;
  var page_url;

  try{
      event_category = req.body.event_category;
      event_name = req.body.event_name;
      page_url = req.body.page_url;
    var row = {
      json: {
        event_category : event_category,
        event_name: event_name,
        page_url: page_url
      }
    };
    var options = {
      raw: true
    };
    table.insert(row, options, insertHandler);
  } catch(e){insertHandler(true, false)};
};

如前所述，问题在于从google cloud函数读取发帖请求，不确定如何取消阻止

Answer 1

代替req.body使用req.query，然后像这样通过URL传递变量，以进行HTTP事件触发Google Cloud Function https://YOUR_REGION-YOUR_PROJECT_ID.cloudfunctions.net/FUNCTION_NAME?event_category=CATEGORY&event_name=EVENT&page_url=URL

当我尝试使用您的代码进行复制时，未分配变量，因此最后将它们分配为undefined，但是将req.body修改为req.query之后，我可以以获得适当的值。

以下是Google Cloud Function的示例代码：

var event_category;
var event_name;
var page_url;

event_category = req.query.event_category;
event_name = req.query.event_name;
page_url = req.query.page_url;

console.log("===VALUES===");
console.log(event_category);
console.log(event_name);
console.log(page_url);

之后，您应该看到在Google Stackdrive日志记录页面中记录的值。

Answer 2

有一种方法可以处理实际的POST，而不必求助于https://cloud.google.com/functions/docs/writing/http#writing_http_helloworld-nodejs的GET ...

const escapeHtml = require('escape-html');

/**
 * Responds to an HTTP request using data from the request body parsed according
 * to the "content-type" header.
 *
 * @param {Object} req Cloud Function request context.
 * @param {Object} res Cloud Function response context.
 */
exports.helloContent = (req, res) => {
  let name;

  switch (req.get('content-type')) {
    // '{"name":"John"}'
    case 'application/json':
      name = req.body.name;
      break;

    // 'John', stored in a Buffer
    case 'application/octet-stream':
      name = req.body.toString(); // Convert buffer to a string
      break;

    // 'John'
    case 'text/plain':
      name = req.body;
      break;

    // 'name=John' in the body of a POST request (not the URL)
    case 'application/x-www-form-urlencoded':
      name = req.body.name;
      break;
  }

  res.status(200).send(`Hello ${escapeHtml(name || 'World')}!`);
};

谷歌云功能无法捕获发布请求

2 个答案: