将 JSON 数据发布到流
问题
您希望将 JSON 数据发布到流中。
解决方案
使用 HTTP In 节点监听 Content-Type 设置为 application/json 的 POST 请求，并以 msg.payload 的属性形式访问解析后的 JSON。
示例
[{"id":"5b98a8ac.a46758","type":"http in","z":"3045204d.cfbae","name":"","url":"/hello-form","method":"post","swaggerDoc":"","x":120,"y":820,"wires":[["bba61009.4459f"]]},{"id":"bba61009.4459f","type":"template","z":"3045204d.cfbae","name":"page","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"<html>\n <head></head>\n <body>\n <h1>Hello {{ payload.name }}!</h1>\n </body>\n</html>","x":290,"y":820,"wires":[["6ceb930a.93146c"]]},{"id":"6ceb930a.93146c","type":"http response","z":"3045204d.cfbae","name":"","x":430,"y":820,"wires":[]}]
[~]$ curl -X POST -d '{"name":"Nick"}' -H "Content-type: application/json" https://:1880/hello-form
<html>
<head></head>
<body>
<h1>Hello Nick!</h1>
</body>
</html>
讨论
当 HTTP In 节点收到 Content-Type 头设置为 application/json 的请求时，它会解析请求正文，并将数据通过 msg.payload 提供。
var name = msg.payload.name;
