application/json

• 数据必须是Unicode编码,默认编码方式为UTF-8

• 因为json数据前2个字符总是ASCII字符({",与[空格]的组合),所以可以推断出其编码方式

  1 2 3 4 5

  00 00 00 xx UTF-32BE 00 xx 00 xx UTF-16BE xx 00 00 00 UTF-32LE xx 00 xx 00 UTF-16LE xx xx xx xx UTF-8

• 若采用UTF-16或UTF-32,则需要设置content-transfer-encoding为binary??

参考:

1. http://www.ietf.org/rfc/rfc4627.txt

参考

1. http://stackoverflow.com/questions/9254891/what-does-content-type-application-json-charset-utf-8-really-mean