剩余的响应头字段提供了有关目标资源在之后的潜在用途的信息。
+-------------------+--------------------------+ | Header Field Name | Defined in... | +-------------------+--------------------------+ | Accept-Ranges | Section 2.3 of [RFC7233] | | Allow | Section 7.4.1 | | Server | Section 7.4.2 | +-------------------+--------------------------+