Cookie可以在Cookie标头中使用，但不能从getCookies（）中获得？

Question

I'm seeing some odd behavior with a cookie on the server side, and would like to understand why.

On the client:

document.cookie = 'test_cookie=' + '[AB]cd|ef-gh[IJ]' + '; path=/;';
document.cookie = 'test_cookie2=' + 'cd|ef-gh' + '; path=/;'; 

On the server:

headers = httpServletRequest.getHeaders()
// iterate and print headers

cookies = httpServletRequest.getCookies();
// iterate and print headers

Output:

// Both are there on the header, so tomcat doesn't block it:
...
header: cookie: test_cookie=[AB]cd|ef-gh[IJ]; test_cookie2=cd|ef-gh


// Only one shows up from getCookies()
...
cookie: test_cookie2=cd|ef-gh
// no test_cookie ???

Why am I not able to see the test_cookie2? I could uri-encode before I set it on the client, but I thought '[' and ']' were allowed cookie characters?

Is there a more correct way to set it?

Answer 1

Here's the way to set the cookie correctly on the frontend:

document.cookie = 'test_cookie="[AB]cd|ef-gh[IJ]"; path=/';

Not the double quotes around the cookie value that contains the special characters.