设置请求头
问题
您需要发送带有特定请求头的 HTTP 请求。
解决方案
将 msg.headers 字段设置为您希望包含在发送到 HTTP request 节点的报文中的请求头的字段值对。
示例
[{"id":"cb1dfcde.fd153","type":"function","z":"124f654c.7a7c6b","name":"set payload and headers","func":"msg.payload = \"data to post\";\nmsg.headers = {};\nmsg.headers['X-Auth-User'] = 'mike';\nmsg.headers['X-Auth-Key'] = 'fred-key';\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":275,"y":600,"wires":[["e44209e7.752698"]]},{"id":"dcf34aab.218928","type":"inject","z":"124f654c.7a7c6b","name":"","repeat":"","crontab":"","once":false,"topic":"","payload":"","payloadType":"date","x":85,"y":600,"wires":[["cb1dfcde.fd153"]]},{"id":"e44209e7.752698","type":"http request","z":"124f654c.7a7c6b","name":"post to HttpBin","method":"POST","ret":"obj","paytoqs":"ignore","url":"https://httpbin.org/post","tls":"","persist":false,"proxy":"","authType":"","x":485,"y":600,"wires":[["ee306582.f0dde8"]]},{"id":"ee306582.f0dde8","type":"debug","z":"124f654c.7a7c6b","name":"","active":true,"console":"false","complete":"false","x":655,"y":600,"wires":[]}]
在此示例中，我们设置 X-Auth-User 和 X-Auth-Key 请求头以调用公共 HttpBin post 测试服务。
下面的 Function 节点中的代码通过添加 msg.headers 对象，并在此对象中设置请求头字段/值来添加这些额外的报文字段，如所示。
msg.payload = "data to post";
msg.headers = {};
msg.headers['X-Auth-User'] = 'mike';
msg.headers['X-Auth-Key'] = 'fred-key';
return msg;
通过展开调试对象请求头扭转器（twistie）可以看到这些内容——因为测试服务会回显请求。
