@vlad8096/stanza
Version:
Modern XMPP in the browser, with a JSON API
529 lines (528 loc) • 20.2 kB
JavaScript
"use strict";
/**
* This file is derived from prior work.
*
* See NOTICE.md for full license text.
*
* Derived from: ltx, Copyright © 2010 Stephan Maka
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.parse = void 0;
const tslib_1 = require("tslib");
// tslint:disable cognitive-complexity max-switch-cases
const events_1 = require("events");
const Definitions_1 = require("./Definitions");
const Element_1 = tslib_1.__importDefault(require("./Element"));
const Error_1 = tslib_1.__importDefault(require("./Error"));
function isBasicNameStart(c) {
return ((97 /* a */ <= c && c <= 122 /* z */) ||
(65 /* A */ <= c && c <= 90 /* Z */) ||
c === 58 /* Colon */ ||
c === 95 /* Underscore */);
}
function isExtendedNameStart(c) {
return ((0xc0 <= c && c <= 0xd6) ||
(0xd8 <= c && c <= 0xf6) ||
(0xf8 <= c && c <= 0x2ff) ||
(0x370 <= c && c <= 0x37d) ||
(0x37f <= c && c <= 0x1fff) ||
(0x200c <= c && c <= 0x200d) ||
(0x2070 <= c && c <= 0x218f) ||
(0x2c00 <= c && c <= 0x2fef) ||
(0x3001 <= c && c <= 0xd7ff) ||
(0xfdf0 <= c && c <= 0xfffd) ||
(0x10000 <= c && c <= 0xeffff));
}
function isNameStart(c) {
return isBasicNameStart(c) || isExtendedNameStart(c);
}
function isName(c) {
return (isBasicNameStart(c) ||
c === 45 /* Dash */ ||
c === 46 /* Period */ ||
(48 /* Zero */ <= c && c <= 57 /* Nine */) ||
c === 0xb7 ||
(0x0300 <= c && c <= 0x036f) ||
(0x203f <= c && c <= 0x2040) ||
isExtendedNameStart(c));
}
function isWhitespace(c) {
return (c === 32 /* Space */ ||
c === 10 /* NewLine */ ||
c === 13 /* CarriageReturn */ ||
c === 9 /* Tab */);
}
class Parser extends events_1.EventEmitter {
constructor(opts = {}) {
super();
this.allowComments = true;
this.attributes = {};
this.state = 34 /* TEXT */;
this.tagName = '';
this.haveDeclaration = false;
this.recordBuffer = [];
if (opts.allowComments !== undefined) {
this.allowComments = opts.allowComments;
}
}
write(data) {
for (const char of data) {
const c = char.codePointAt(0);
switch (this.state) {
case 34 /* TEXT */: {
if (c === 60 /* LessThan */) {
let text;
try {
text = Definitions_1.unescapeXML(this.endRecord());
}
catch (err) {
this.emit('error', err);
return;
}
if (text) {
this.emit('text', text);
}
this.transition(31 /* TAG_START */);
continue;
}
else {
this.record(char);
continue;
}
}
case 31 /* TAG_START */: {
if (c === 47 /* Slash */) {
this.transition(7 /* CLOSING_TAG_START */);
continue;
}
if (c === 33 /* Exclamation */) {
this.transition(24 /* START_INSTRUCTION */);
continue;
}
if (c === 63 /* Question */) {
if (this.haveDeclaration) {
this.restrictedXML();
}
this.transition(25 /* START_PROCESSING_INSTRUCTION */);
continue;
}
if (isNameStart(c)) {
this.transition(30 /* TAG_NAME */);
this.startRecord(char);
continue;
}
return this.notWellFormed();
}
case 30 /* TAG_NAME */: {
if (isName(c)) {
this.record(char);
continue;
}
if (isWhitespace(c)) {
this.startTag();
this.transition(32 /* TAG_WAIT_NAME */);
continue;
}
if (c === 47 /* Slash */) {
this.startTag();
this.transition(29 /* TAG_END_SLASH */);
continue;
}
if (c === 62 /* GreaterThan */) {
this.startTag();
this.transition(34 /* TEXT */);
this.emit('startElement', this.tagName, this.attributes);
continue;
}
return this.notWellFormed();
}
case 29 /* TAG_END_SLASH */: {
if (c === 62 /* GreaterThan */) {
this.emit('startElement', this.tagName, this.attributes);
this.emit('endElement', this.tagName);
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 33 /* TAG */: {
if (isWhitespace(c)) {
this.transition(32 /* TAG_WAIT_NAME */);
continue;
}
if (c === 47 /* Slash */) {
this.transition(29 /* TAG_END_SLASH */);
continue;
}
if (c === 62 /* GreaterThan */) {
this.emit('startElement', this.tagName, this.attributes);
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 32 /* TAG_WAIT_NAME */: {
if (isWhitespace(c)) {
continue;
}
if (isNameStart(c)) {
this.startRecord(char);
this.transition(0 /* ATTR_NAME */);
continue;
}
if (c === 47 /* Slash */) {
this.transition(29 /* TAG_END_SLASH */);
continue;
}
if (c === 62 /* GreaterThan */) {
this.emit('startElement', this.tagName, this.attributes);
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 7 /* CLOSING_TAG_START */: {
if (isNameStart(c)) {
this.startRecord(char);
this.transition(6 /* CLOSING_TAG_NAME */);
continue;
}
return this.notWellFormed();
}
case 6 /* CLOSING_TAG_NAME */: {
if (isName(c)) {
this.record(char);
continue;
}
if (isWhitespace(c)) {
this.transition(8 /* CLOSING_TAG */);
continue;
}
if (c === 62 /* GreaterThan */) {
const tag = this.endRecord();
this.emit('endElement', tag, this.attributes);
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 8 /* CLOSING_TAG */: {
if (isWhitespace(c)) {
continue;
}
if (c === 62 /* GreaterThan */) {
const tag = this.endRecord();
this.emit('endElement', tag, this.attributes);
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 0 /* ATTR_NAME */: {
if (isName(c)) {
this.record(char);
continue;
}
if (c === 61 /* Equal */) {
this.addAttribute();
this.transition(4 /* ATTR_WAIT_QUOTE */);
continue;
}
if (isWhitespace(c)) {
this.addAttribute();
this.transition(3 /* ATTR_WAIT_EQ */);
continue;
}
return this.notWellFormed();
}
case 3 /* ATTR_WAIT_EQ */: {
if (c === 61 /* Equal */) {
this.transition(4 /* ATTR_WAIT_QUOTE */);
continue;
}
if (isWhitespace(c)) {
continue;
}
return this.notWellFormed();
}
case 4 /* ATTR_WAIT_QUOTE */: {
if (c === 34 /* DoubleQuote */) {
this.startRecord();
this.transition(1 /* ATTR_QUOTE_DOUBLE */);
continue;
}
if (c === 39 /* SingleQuote */) {
this.startRecord();
this.transition(2 /* ATTR_QUOTE_SINGLE */);
continue;
}
if (isWhitespace(c)) {
continue;
}
return this.notWellFormed();
}
case 1 /* ATTR_QUOTE_DOUBLE */:
case 2 /* ATTR_QUOTE_SINGLE */: {
if ((c === 34 /* DoubleQuote */ && this.state === 1 /* ATTR_QUOTE_DOUBLE */) ||
(c === 39 /* SingleQuote */ && this.state === 2 /* ATTR_QUOTE_SINGLE */)) {
const value = this.endRecord();
this.attributes[this.attributeName] = Definitions_1.unescapeXML(value);
this.transition(33 /* TAG */);
continue;
}
if (c === 60 /* LessThan */) {
return this.notWellFormed();
}
this.record(char);
continue;
}
case 24 /* START_INSTRUCTION */: {
if (c === 45 /* Dash */) {
if (!this.allowComments) {
this.restrictedXML();
}
this.transition(23 /* START_COMMENT_DASH */);
continue;
}
if (c === 91 /* LeftBracket */) {
this.transition(21 /* START_CDATA_LB */);
continue;
}
return this.notWellFormed();
}
case 23 /* START_COMMENT_DASH */: {
if (c === 45 /* Dash */) {
this.transition(14 /* IGNORE_COMMENT */);
continue;
}
return this.notWellFormed();
}
case 14 /* IGNORE_COMMENT */: {
if (c === 45 /* Dash */) {
this.transition(12 /* END_COMMENT_DASH */);
}
continue;
}
case 12 /* END_COMMENT_DASH */: {
if (c === 45 /* Dash */) {
this.transition(11 /* END_COMMENT_DASH_DASH */);
}
else {
this.transition(14 /* IGNORE_COMMENT */);
}
continue;
}
case 11 /* END_COMMENT_DASH_DASH */: {
if (c === 62 /* GreaterThan */) {
this.transition(34 /* TEXT */);
}
else {
this.transition(14 /* IGNORE_COMMENT */);
}
continue;
}
case 25 /* START_PROCESSING_INSTRUCTION */: {
if (c === 88 /* X */ || c === 120 /* x */) {
this.transition(28 /* START_XML_DECLARATION_X */);
continue;
}
return this.notWellFormed();
}
case 28 /* START_XML_DECLARATION_X */: {
if (c === 77 /* M */ || c === 109 /* m */) {
this.transition(27 /* START_XML_DECLARATION_X_M */);
continue;
}
return this.notWellFormed();
}
case 27 /* START_XML_DECLARATION_X_M */: {
if (c === 76 /* L */ || c === 108 /* l */) {
this.transition(26 /* START_XML_DECLARATION_X_M_L */);
continue;
}
return this.notWellFormed();
}
case 26 /* START_XML_DECLARATION_X_M_L */: {
if (isWhitespace(c)) {
this.haveDeclaration = true;
this.transition(15 /* IGNORE_INSTRUCTION */);
continue;
}
return this.notWellFormed();
}
case 13 /* END_XML_DECLARATION_QM */: {
if (c === 62 /* GreaterThan */) {
this.transition(34 /* TEXT */);
continue;
}
return this.notWellFormed();
}
case 15 /* IGNORE_INSTRUCTION */: {
if (c === 63 /* Question */) {
this.transition(13 /* END_XML_DECLARATION_QM */);
}
continue;
}
case 21 /* START_CDATA_LB */: {
this.wait(c, 67 /* C */, 20 /* START_CDATA_LB_C */);
continue;
}
case 20 /* START_CDATA_LB_C */: {
this.wait(c, 68 /* D */, 19 /* START_CDATA_LB_C_D */);
continue;
}
case 19 /* START_CDATA_LB_C_D */: {
this.wait(c, 65 /* A */, 18 /* START_CDATA_LB_C_D_A */);
continue;
}
case 18 /* START_CDATA_LB_C_D_A */: {
this.wait(c, 84 /* T */, 17 /* START_CDATA_LB_C_D_A_T */);
continue;
}
case 17 /* START_CDATA_LB_C_D_A_T */: {
this.wait(c, 65 /* A */, 16 /* START_CDATA_LB_C_D_A_T_A */);
continue;
}
case 16 /* START_CDATA_LB_C_D_A_T_A */: {
this.wait(c, 91 /* LeftBracket */, 5 /* CDATA */);
continue;
}
case 5 /* CDATA */: {
if (c === 93 /* RightBracket */) {
this.transition(10 /* END_CDATA_RB */);
continue;
}
this.record(char);
continue;
}
case 10 /* END_CDATA_RB */: {
if (c === 93 /* RightBracket */) {
this.transition(9 /* END_CDATA_RB_RB */);
}
else {
this.record(String.fromCodePoint(93 /* RightBracket */));
this.record(char);
this.transition(5 /* CDATA */);
}
continue;
}
case 9 /* END_CDATA_RB_RB */: {
if (c === 62 /* GreaterThan */) {
const text = this.endRecord();
if (text) {
this.emit('text', text);
}
this.transition(34 /* TEXT */);
}
else {
this.record(String.fromCodePoint(93 /* RightBracket */));
this.record(String.fromCodePoint(93 /* RightBracket */));
this.record(char);
this.transition(5 /* CDATA */);
}
continue;
}
}
}
}
end(data) {
if (data) {
this.write(data);
}
this.write = () => undefined;
}
record(char) {
this.recordBuffer.push(char);
}
startRecord(char) {
this.recordBuffer = [];
if (char) {
this.recordBuffer.push(char);
}
}
endRecord() {
const data = this.recordBuffer;
this.recordBuffer = [];
return data.join('');
}
startTag() {
this.tagName = this.endRecord();
this.attributes = {};
}
addAttribute() {
const name = this.endRecord();
if (this.attributes[name] !== undefined) {
return this.notWellFormed();
}
this.attributeName = name;
this.attributes[name] = '';
}
wait(c, nextChar, newState) {
if (c === nextChar) {
this.transition(newState);
return;
}
return this.notWellFormed();
}
transition(state) {
this.state = state;
if (state === 34 /* TEXT */) {
this.startRecord();
}
}
notWellFormed(msg) {
this.emit('error', Error_1.default.notWellFormed(msg));
}
restrictedXML(msg) {
this.emit('error', Error_1.default.restrictedXML(msg));
}
}
function parse(data, opts = {}) {
const p = new Parser(opts);
let result;
let element;
let error = null;
p.on('text', (text) => {
if (element) {
element.children.push(text);
}
});
p.on('startElement', (name, attrs) => {
const child = new Element_1.default(name, attrs);
if (!result) {
result = child;
}
if (!element) {
element = child;
}
else {
element = element.appendChild(child);
}
});
p.on('endElement', (name) => {
if (!element) {
p.emit('error', Error_1.default.notWellFormed('a'));
}
else if (name === element.name) {
if (element.parent) {
element = element.parent;
}
}
else {
p.emit('error', Error_1.default.notWellFormed('b'));
}
});
p.on('error', (e) => {
error = e;
});
p.write(data);
p.end();
if (error) {
throw error;
}
else {
return result;
}
}
exports.parse = parse;
exports.default = Parser;