they

Node_报:Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

遇到情况: 我在Node js中设置了res.setHeader(\’Content-type\& […]

Typesrcript学习笔记

node中express的，res.send() 或res.json()这类客户端返回的方法仅返回一次，如果多 […]

Cannot set headers after they are sent to the client

D:\le\node_modules\mysql\lib\protocol\Parser.js:80 thro […]

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

这种问题的出现是由于，node每次只能返回一次res.send()，如果返回多次就会报这样的错。