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fixing indent
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bwhitn
parent
ed17ed2919
commit
13b10a68a2
1 changed files with 152 additions and 151 deletions
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@ -4,178 +4,179 @@
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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import OperationError from "../errors/OperationError";
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import cptable from "../vendor/js-codepage/cptable.js";
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import {fromBase64} from "../lib/Base64";
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import {decodeQuotedPrintable} from "../lib/QuotedPrintable"
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import {MIME_FORMAT} from "../lib/ChrEnc";
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import Operation from "../Operation";
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import OperationError from "../errors/OperationError";
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import cptable from "../vendor/js-codepage/cptable.js";
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import {fromBase64} from "../lib/Base64";
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import {decodeQuotedPrintable} from "../lib/QuotedPrintable";
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import {MIME_FORMAT} from "../lib/ChrEnc";
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import Utils from "../Utils";
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//TODO: fix function header
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/**
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* Return the conetent encoding for a mime section from a header object.
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* CONTENT_TYPE returns the content type of a mime header from a header object.
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* Returns the filename from a mime header object.
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* Returns the boundary value for the mime section from a header object.
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* @constant
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* @default
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*/
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const FIELD_ITEM = {
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FILENAME: [/filename=".*?([^~#%&*\][\\:<>?/|]+)"/, "content-disposition"],
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CONTENT_TYPE: [/\s*([^;\s]+)/, "content-type"],
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BOUNDARY: [/boundary="(.+?)"/, "content-type"],
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CHARSET: [/charset=([a-z0-9-]+)/, "content-type"],
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TRANSER_ENCODING: [/\s*([A-Za-z0-9-]+)\s*/, "content-transfer-encoding"],
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}
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// TODO: fix function header
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/**
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* Return the conetent encoding for a mime section from a header object.
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* CONTENT_TYPE returns the content type of a mime header from a header object.
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* Returns the filename from a mime header object.
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* Returns the boundary value for the mime section from a header object.
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* @constant
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* @default
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*/
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const FIELD_ITEM = {
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FILENAME: [/filename=".*?([^~#%&*\][\\:<>?/|]+)"/, "content-disposition"],
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CONTENT_TYPE: [/\s*([^;\s]+)/, "content-type"],
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BOUNDARY: [/boundary="(.+?)"/, "content-type"],
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CHARSET: [/charset=([a-z0-9-]+)/, "content-type"],
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TRANSER_ENCODING: [/\s*([A-Za-z0-9-]+)\s*/, "content-transfer-encoding"],
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}
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/**
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* @constant
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* @default
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*/
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//TODO: should 8 bit and 7 bit be treated the same?
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const DECODER = {
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"base64": function (input) {
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return fromBase64(input, Base64.ALPHABET, "string", true);
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},
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"quoted-printable": function (input) {
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return decodeQuotedPrintable(input);
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},
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"7bit": function (input) {
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return input;
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},
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"8bit": function (input) {
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return input;
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},
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}
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/**
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* @constant
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* @default
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*/
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// TODO: should 8 bit and 7 bit be treated the same?
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const DECODER = {
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"base64": function (input) {
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return fromBase64(input);
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},
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"quoted-printable": function (input) {
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return Utils.byteArrayToUtf8(decodeQuotedPrintable(input));
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},
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"7bit": function (input) {
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return input;
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},
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"8bit": function (input) {
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return input;
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},
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}
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class ParseIMF extends Operation {
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class ParseIMF extends Operation {
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/**
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* Internet MessageFormat constructor
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*/
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constructor() {
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super();
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this.name = "Parse Internet Message Format";
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this.module = "Default";
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this.description = ["Parser an IMF formatted messages following RFC5322.",
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"<br><br>",
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"Parses an IMF formated message. These often have the file extention ".eml"e; and contain the email headers and body. The output will be a file list of the headers and mime parts.",
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].join("\n");
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this.infoURL = "https://tools.ietf.org/html/rfc5322";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [];
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/**
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* Internet MessageFormat constructor
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*/
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constructor() {
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super();
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this.name = "Parse Internet Message Format";
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this.module = "Default";
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this.description = ["Parser an IMF formatted messages following RFC5322.",
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"<br><br>",
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"Parses an IMF formated message. These often have the file extention ".eml"e; and contain the email headers and body. The output will be a file list of the headers and mime parts.",
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].join("\n");
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this.infoURL = "https://tools.ietf.org/html/rfc5322";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [];
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}
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/**
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* Basic Email Parser that displays the header and mime sections as files.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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if (!input) {
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return;
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* Basic Email Parser that displays the header and mime sections as files.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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if (!input) {
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return;
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}
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let headerBody = this.splitHeaderFromBody(input);
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let header = headerBody[0];
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let headerArray = this.parseHeader(header);
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if (args[0]) {
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header = this.replaceDecodeWord(header);
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}
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return JSON.stringify(headerArray);
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}
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let headerBody = this.splitHeaderFromBody(input);
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let header = headerBody[0];
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let headerArray = this.parseHeader(header);
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if (args[0]) {
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header = this.replaceDecodeWord(header);
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/**
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* Breaks the header from the body and returns [header, body]
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*
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* @param {string} input
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* @returns {string[]}
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*/
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splitHeaderFromBody(input) {
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const emlRegex = /^([\x20-\x7e\n\r\t]+?)(?:\r?\n){2}([\x20-\x7e\t\n\r]*)/;
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let splitEmail = emlRegex.exec(input);
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if (splitEmail) {
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//TODO: Array splice vs shift?
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splitEmail.shift();
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return splitEmail;
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}
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}
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return JSON.stringify(headerArray);
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}
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/**
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* Breaks the header from the body and returns [header, body]
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*
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* @param {string} input
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* @returns {string[]}
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*/
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splitHeaderFromBody(input) {
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const emlRegex = /^([\x20-\x7e\n\r\t]+?)(?:\r?\n){2}([\x20-\x7e\t\n\r]*)/;
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let splitEmail = emlRegex.exec(input);
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if (splitEmail) {
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//TODO: Array splice vs shift?
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splitEmail.shift();
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return splitEmail;
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}
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}
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/**
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* Takes a string and decodes quoted words inside them
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* These take the form of =?utf-8?Q?Hello?=
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*
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* @param {string} input
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* @returns {string}
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*/
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replaceDecodeWord(input) {
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return input.replace(/=\?([^?]+)\?(Q|B)\?([^?]+)\?=/g, function (a, charEnc, contEnc, input) {
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//TODO fix Q encoding as it isn't identical to quoted-printable. ie _=" "
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contEnc = (contEnc === "B") ? "base64" : "quoted-printable";
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return this.decodeMimeData(input, charEnc, contEnc);
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});
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}
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/**
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* Takes a string and decodes quoted words inside them
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* These take the form of =?utf-8?Q?Hello?=
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*
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* @param {string} input
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* @returns {string}
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*/
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replaceDecodeWord(input) {
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return input.replace(/=\?([^?]+)\?(Q|B)\?([^?]+)\?=/g, function (a, charEnc, contEnc, input) {
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//TODO fix Q encoding as it isn't identical to quoted-printable. ie _=" "
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contEnc = (contEnc === "B") ? "base64" : "quoted-printable";
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return this.decodeMimeData(input, charEnc, contEnc);
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});
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}
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/**
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* Breaks a header into a object to be used by other functions.
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* It removes any line feeds or carriage returns from the values and
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* replaces it with a space.
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*
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* @param {string} input
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* @returns {object}
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*/
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parseHeader(input) {
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const sectionRegex = /([A-Z-]+):\s+([\x20-\x7e\r\n\t]+?)(?=$|\r?\n\S)/gi;
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let header = {}, section;
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while ((section = sectionRegex.exec(input))) {
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let fieldName = section[1].toLowerCase();
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let fieldValue = section[2].replace(/\n|\r/g, " ");
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if (header[fieldName]) {
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header[fieldName].push(fieldValue);
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} else {
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header[fieldName] = [fieldValue];
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}
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}
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return header;
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}
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/**
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* Breaks a header into a object to be used by other functions.
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* It removes any line feeds or carriage returns from the values and
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* replaces it with a space.
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*
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* @param {string} input
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* @returns {object}
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*/
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parseHeader(input) {
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const sectionRegex = /([A-Z-]+):\s+([\x20-\x7e\r\n\t]+?)(?=$|\r?\n\S)/gi;
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let header = {}, section;
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while ((section = sectionRegex.exec(input))) {
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let fieldName = section[1].toLowerCase();
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let fieldValue = section[2].replace(/\n|\r/g, " ");
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if (header[fieldName]) {
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header[fieldName].push(fieldValue);
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} else {
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header[fieldName] = [fieldValue];
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}
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}
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return header;
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}
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/**
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* Return decoded MIME data given the character encoding and content encoding.
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*
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* @param {string} input
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* @param {string} charEnc
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* @param {string} contEnc
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* @returns {string}
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*/
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decodeMimeData(input, charEnc, contEnc) {
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/**
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* Return decoded MIME data given the character encoding and content encoding.
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*
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* @param {string} input
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* @param {string} charEnc
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* @param {string} contEnc
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* @returns {string}
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*/
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decodeMimeData(input, charEnc, contEnc) {
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//TODO: make exceptions for unknown charEnc and contEnc?
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input = this.DECODER[contEnc](input);
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if (charEnc) {
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input = cptable.utils.decode(this.MIME_FORMAT[charEnc.toLowerCase()], input);
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}
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return input;
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}
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}
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/**
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* Returns a header item given a header object, itemName, and index number.
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*
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* @param {object} header
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* @param {object} FIELD_ITEM
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* @param {integer} fieldNum
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* @returns {string}
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*/
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getHeaderItem(header, fieldItem, fieldNum = 0){
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if (fieldItem[1] in header && header[fieldItem[1]].length > fieldNum) {
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let field = header[fieldItem[1]][fieldNum], item;
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if ((item = fieldItem[0].exec(field))) {
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return item[1];
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}
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}
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}
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/**
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* Returns a header item given a header object, itemName, and index number.
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*
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* @param {object} header
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* @param {object} FIELD_ITEM
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* @param {integer} fieldNum
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* @returns {string}
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*/
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getHeaderItem(header, fieldItem, fieldNum = 0){
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if (fieldItem[1] in header && header[fieldItem[1]].length > fieldNum) {
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let field = header[fieldItem[1]][fieldNum], item;
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if ((item = fieldItem[0].exec(field))) {
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return item[1];
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}
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}
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}
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}
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