[英]iron-ajax bind and write JSON to file
I have the following iron-ajax element in my html: 我的html中包含以下iron-ajax元素:
<iron-ajax
id="write-tweets"
body='[{"statuses": "{{tweets}}"}]'
url="/fscall"
handle-as="json">
</iron-ajax>
And I have this in the js file for the above html: 我在上面的html的js文件中有这个:
Polymer({
is: "sample-app",
properties: {
tweets: {
type: Object,
value: [],
},
},
handleResponse(e){
console.log("_________Twitter responses aquired:_________");
this.tweets = this.tweets.concat(e.detail.response.statuses);
this.writeTweets();
},
At this point, tweets
is an array of JSON objects: 此时, tweets
是一个JSON对象数组:
Now I'm trying to send this back to the node.js server so I can write/save it to a file. 现在,我尝试将其发送回node.js服务器,以便可以将其写入/保存到文件中。
writeTweets(){
let ajax = this.root.querySelector('#write-tweets');
ajax.generateRequest();
}
... //some unrelated code
I have the following in app.js: 我在app.js中有以下内容:
app.get('/fscall', (req, res) => {
fs.writeFile("tweets.json", JSON.parse(req.body, null, 4), function(err) {
if (err) {
console.log(err);
}
});
});
And here I'm running into errors, I have no idea how to access the JSON that I sent, req.body
seems to be empty. 在这里我req.body
了错误,我不知道如何访问我发送的JSON, req.body
似乎为空。 Same happens if I try to wrap tweets
in a getter (eg doing {returnTweets(){ return this.tweets;},
and body='[{"statuses": "{{returnTweets()}}"}]'
. 如果我尝试{returnTweets(){ return this.tweets;},
tweets
包装在吸气剂中(例如,执行{returnTweets(){ return this.tweets;},
and body='[{"statuses": "{{returnTweets()}}"}]'
。
Can anyone advise on how I could pass the JSON and print it? 谁能建议我如何传递JSON并进行打印?
UPDATE 更新
OK so I'm managing to bind the tweets to the body
of the request by doing 好的,因此我正在通过以下方式将推文绑定到请求body
<iron-ajax
method="POST"
id="write-tweets"
body$='{"statuses": {{tweetsParsed}}}'
url="/fscall"
handle-as="json">
</iron-ajax>
Where tweetsParsed
is a property that contains the JSON.stringify
ed tweets. 其中tweetsParsed
是包含JSON.stringify
ed tweets的属性。 Now if I check the ajax request, it contains the tweets in the body: 现在,如果我检查了ajax请求,它在主体中包含推文:
HOWEVER, I'm still not getting anything on the server side, and console. 但是,我仍然无法在服务器端和控制台上得到任何东西。 logging request.body
returns {}
... Any idea why this is happening? 正在记录request.body
返回{}
...知道为什么会这样吗?
request.body.statuses
如果您实际上将json发送到后端,则应在request.body.statuses
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