The header content contains invalid characters TypeError: The header content contains invalid characters at ServerResponse.

[kimown]

hi , today i upgrade my node version to 4.4.4 LTS, and i found something wrong in my old project.
the method i am using in my project

 res.redirect(`app.html?md=${url}`);

the url contains some chinese characters。
i find same error in github, http-party/node-http-proxy#964,
in nodejs/node@7bef1b7#diff-286202fdbdd74ede6f5f5334b6176b5cR298,
the commit add a method called _checkInvalidHeaderChar ,it will check the parameter.
when i am using res.redirect ,
，then the error occurs and my program exit.

i think setHeader should add try catch in https://github.com/expressjs/express/blob/master/lib/response.js#L1046 and
https://github.com/expressjs/express/blob/master/lib/response.js#L718

or using encodeURIComponent because i want to show title of the article in search bar.

res.redirect(`app.html?md=${encodeURIComponent(url)}`)

[dougwilson]

Hi! res.redirect expects you to give it a URL, as such you would be responsible to call encodeURIComponent if that is necessary for your string.

[dougwilson]

I know this is a semi-old issue, but the good news is that the underlying res.location will change in Express 4.14 to provide better behavior, including no longer throwing when you used your original code.