node-eml-parser-buffer

// new emlParser 的参数
export interface ParserOptions {
    emlData: Buffer;
    debug?: boolean;
}

// 邮件头行,字符串节点
export interface TokenNode {
    data: Buffer;
    charset: string;
}

// 邮件头行的,值和键值对
export interface MimeValueParams {
    value: Buffer;
    params: {
        [key: string]: Buffer;
    };
}

// 邮件头行
export interface MimeLine {
    name: string;
    value: Buffer;
}

// 邮件地址
export interface MimeAddress {
    name: string;
    address: string;
}

// 未解码的邮件地址
export interface MimeAddressDecoder {
    nameBuffer: Buffer;
    address: string;
}

const emlParser = require("eml-parser-buffer")

var options = {
    emlData: fs.readFileSync("somepath") // 应该是 Buffer
}
var parser = new emlParser.emlParser(options)

subject: null | string
from: null | MimeAddress
to: null | MimeAddress[]
cc: null | MimeAddress[]
bcc: null | MimeAddress[]
messageId: null | string
date: null | string
dateUnix: number
sender: null | MimeAddress
replyTo: null | MimeAddress
dispositionNotificationTo: null | MimeAddress
references: null | (string[])
topNode: mimeNode

// 所有的Mime节点
get allNodes(): mimeNode[]
// 所有的可显的正文文本节点
get textNodes()
// 所有优先显示的正文文本节点(优先html)
get alternativeShowNodes()
//所有的附件节点
get attachmentNodes()

// 返回第一个名字是name的邮件头行
getFirstHeaderLine(name: string)

parser: emlParser
headerStartPos: number
headerLength: number
headers: MimeLine[]
bodyStartPos: number
bodyLength: number
contentType: string
encoding: string
charset: string
name: string
filename: string
contentId: string
disposition: string
boundary: string
parent: null | mimeNode
childs: null | mimeNode[]

// 是否内嵌(图片)附件
get isInline()

// 是否是 TNEF 类型附件
get isTnef()

// (如果是 TEXT/* 类型)获取解码并字符集转码后的文本
get textContent(): string 

// 获取解码后的附件内容
getDecodedBuffer(): Buffer
// 获取名字为name的第一个 Mime 头行
getFirstHeaderLine(name: string): null | MimeLine

// 解码 rfc2231 规范的文件名/属性值等
function decode2231(data: Buffer, withCharset: boolean): TokenNode[];
// 如上, 并转码为字符串
function decode2231ToString(data: Buffer, withCharset: boolean): string;
// 在一堆params里面, 转码键为name的值并转码为字符串
function decodeParamToString(params: { [name: string]: Buffer; }, name: string): string;
// 解析邮件头行
function decodeValue(line: Buffer): TokenNode[];
// 如上, 并转码为字符串
function decodeValueToString(line: Buffer): string;
// 解析邮件头行
function decodeLineToValueAndParams(line: Buffer): MimeValueParams;

type CharsetConverter = (data: Buffer, charset: string) => string | null
export function setCharsetConvertHandler(converter: CharsetConverter | undefined);