摘要
在简介RFC822标准的基础上，对照RFC822标准中的定义，分析了多用途Internet邮件扩展（MIME）报文中增加的MIME版本、内容类型、传输编码格式、内容ID和内容说明等5个新的头域。并针对RFC822指定邮件消息必须是ASCⅡ字符，讨论了数据转换中MIME定义的可打印编码和64基编码2种编码技术。给出了可打印编码应遵守的5条规则及其解码函数，64基编码时使用的ASCⅡ的65字符子集和编码算法，及其解码函数。
According to the definitions in RFC822, the five new heads that are added in MIME messages such as MIME-version, content-type, content-transfer-encoding, content-ID and content-description are analyzed. Aiming at mail messages defined by RFC822 is ASCⅡ characters, two encoding methods that quoted-printable and BASE64 defined by MIME are discussed. The rules and decoding function, ASCⅡ characters and encoding algorithm are given.
出处
《兵工自动化》
2001年第2期50-53,共4页
Ordnance Industry Automation
