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ProtoBuf.js
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ProtoBuf.js
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/*
Copyright 2013 Daniel Wirtz <dcode@dcode.io>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @license ProtoBuf.js (c) 2013 Daniel Wirtz <dcode@dcode.io>
* Released under the Apache License, Version 2.0
* see: https://github.com/dcodeIO/ProtoBuf.js for details
*/
(function(global) {
"use strict";
function loadProtoBuf(ByteBuffer) {
/**
* The ProtoBuf namespace.
* @exports ProtoBuf
* @namespace
* @expose
*/
var ProtoBuf = {};
/**
* ProtoBuf.js version.
* @type {string}
* @const
* @expose
*/
ProtoBuf.VERSION = "2.2.0";
/**
* Wire types.
* @type {Object.<string,number>}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES = {};
/**
* Varint wire type.
* @type {number}
* @expose
*/
ProtoBuf.WIRE_TYPES.VARINT = 0;
/**
* Fixed 64 bits wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.BITS64 = 1;
/**
* Length delimited wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.LDELIM = 2;
/**
* Start group wire type.
* @type {number}
* @const
* @deprecated Not supported.
* @expose
*/
ProtoBuf.WIRE_TYPES.STARTGROUP = 3;
/**
* End group wire type.
* @type {number}
* @const
* @deprecated Not supported.
* @expose
*/
ProtoBuf.WIRE_TYPES.ENDGROUP = 4;
/**
* Fixed 32 bits wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.BITS32 = 5;
/**
* Types.
* @dict
* @type {Object.<string,{name: string, wireType: number}>}
* @const
* @expose
*/
ProtoBuf.TYPES = {
// According to the protobuf spec.
"int32": {
name: "int32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"uint32": {
name: "uint32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"sint32": {
name: "sint32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"int64": {
name: "int64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"uint64": {
name: "uint64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"sint64": {
name: "sint64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"bool": {
name: "bool",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"double": {
name: "double",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"string": {
name: "string",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
},
"bytes": {
name: "bytes",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
},
"fixed32": {
name: "fixed32",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"sfixed32": {
name: "sfixed32",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"fixed64": {
name: "fixed64",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"sfixed64": {
name: "sfixed64",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"float": {
name: "float",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"enum": {
name: "enum",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"message": {
name: "message",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
}
};
/**
* @type {?Long}
*/
ProtoBuf.Long = ByteBuffer.Long;
/**
* If set to `true`, field names will be converted from underscore notation to camel case. Defaults to `false`.
* Must be set prior to parsing.
* @type {boolean}
* @expose
*/
ProtoBuf.convertFieldsToCamelCase = false;
/**
* @alias ProtoBuf.Util
* @expose
*/
ProtoBuf.Util = (function() {
"use strict";
// Object.create polyfill
// ref: https://developer.mozilla.org/de/docs/JavaScript/Reference/Global_Objects/Object/create
if (!Object.create) {
/** @expose */
Object.create = function (o) {
if (arguments.length > 1) {
throw new Error('Object.create implementation only accepts the first parameter.');
}
function F() {}
F.prototype = o;
return new F();
};
}
/**
* ProtoBuf utilities.
* @exports ProtoBuf.Util
* @namespace
*/
var Util = {};
/**
* Flag if running in node or not.
* @type {boolean}
* @const
* @expose
*/
Util.IS_NODE = (typeof window === 'undefined' || !window.window) && typeof require === 'function' && typeof process !== 'undefined' && typeof process["nextTick"] === 'function';
/**
* Constructs a XMLHttpRequest object.
* @return {XMLHttpRequest}
* @throws {Error} If XMLHttpRequest is not supported
* @expose
*/
Util.XHR = function() {
// No dependencies please, ref: http://www.quirksmode.org/js/xmlhttp.html
var XMLHttpFactories = [
function () {return new XMLHttpRequest()},
function () {return new ActiveXObject("Msxml2.XMLHTTP")},
function () {return new ActiveXObject("Msxml3.XMLHTTP")},
function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];
/** @type {?XMLHttpRequest} */
var xhr = null;
for (var i=0;i<XMLHttpFactories.length;i++) {
try { xhr = XMLHttpFactories[i](); }
catch (e) { continue; }
break;
}
if (!xhr) throw(new Error("XMLHttpRequest is not supported"));
return xhr;
};
/**
* Fetches a resource.
* @param {string} path Resource path
* @param {function(?string)=} callback Callback receiving the resource's contents. If omitted the resource will
* be fetched synchronously. If the request failed, contents will be null.
* @return {?string|undefined} Resource contents if callback is omitted (null if the request failed), else undefined.
* @expose
*/
Util.fetch = function(path, callback) {
if (callback && typeof callback != 'function') callback = null;
if (Util.IS_NODE) {
if (callback) {
require("fs").readFile(path, function(err, data) {
if (err) {
callback(null);
}
else callback(""+data);
});
} else {
try {
return require("fs").readFileSync(path);
} catch (e) {
return null;
}
}
} else {
var xhr = Util.XHR();
xhr.open('GET', path, callback ? true : false);
// xhr.setRequestHeader('User-Agent', 'XMLHTTP/1.0');
xhr.setRequestHeader('Accept', 'text/plain');
if (typeof xhr.overrideMimeType === 'function') xhr.overrideMimeType('text/plain');
if (callback) {
xhr.onreadystatechange = function() {
if (xhr.readyState != 4) return;
if (/* remote */ xhr.status == 200 || /* local */ (xhr.status == 0 && typeof xhr.responseText === 'string')) {
callback(xhr.responseText);
} else {
callback(null);
}
};
if (xhr.readyState == 4) return;
xhr.send(null);
} else {
xhr.send(null);
if (/* remote */ xhr.status == 200 || /* local */ (xhr.status == 0 && typeof xhr.responseText === 'string')) {
return xhr.responseText;
}
return null;
}
}
};
/**
* Tests if an object is an array.
* @param {*} obj Object to test
* @returns {boolean} true if it is an array, else false
* @expose
*/
Util.isArray = function(obj) {
if (!obj) return false;
if (obj instanceof Array) return true;
if (Array.isArray) return Array.isArray(obj);
return Object.prototype.toString.call(obj) === "[object Array]";
};
return Util;
})();
/**
* @alias ProtoBuf.Lang
* @expose
*/
ProtoBuf.Lang = (function() {
"use strict";
/**
* ProtoBuf Language.
* @exports ProtoBuf.Lang
* @type {Object.<string,string|RegExp>}
* @namespace
* @expose
*/
var Lang = { // Look, so cute!
OPEN: "{",
CLOSE: "}",
OPTOPEN: "[",
OPTCLOSE: "]",
OPTEND: ",",
EQUAL: "=",
END: ";",
STRINGOPEN: '"',
STRINGCLOSE: '"',
STRINGOPEN_SQ: "'",
STRINGCLOSE_SQ: "'",
COPTOPEN: '(',
COPTCLOSE: ')',
DELIM: /[\s\{\}=;\[\],'"\(\)]/g,
KEYWORD: /^(?:package|option|import|message|enum|extend|service|syntax|extensions)$/,
RULE: /^(?:required|optional|repeated)$/,
TYPE: /^(?:double|float|int32|uint32|sint32|int64|uint64|sint64|fixed32|sfixed32|fixed64|sfixed64|bool|string|bytes)$/,
NAME: /^[a-zA-Z_][a-zA-Z_0-9]*$/,
OPTNAME: /^(?:[a-zA-Z][a-zA-Z_0-9]*|\([a-zA-Z][a-zA-Z_0-9]*\))$/,
TYPEDEF: /^[a-zA-Z][a-zA-Z_0-9]*$/,
TYPEREF: /^(?:\.?[a-zA-Z][a-zA-Z_0-9]*)+$/,
FQTYPEREF: /^(?:\.[a-zA-Z][a-zA-Z_0-9]*)+$/,
NUMBER: /^-?(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+|[0-9]*\.[0-9]+)$/,
NUMBER_DEC: /^(?:[1-9][0-9]*|0)$/,
NUMBER_HEX: /^0x[0-9a-fA-F]+$/,
NUMBER_OCT: /^0[0-7]+$/,
NUMBER_FLT: /^[0-9]*\.[0-9]+$/,
ID: /^(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+)$/,
NEGID: /^\-?(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+)$/,
WHITESPACE: /\s/,
STRING: /['"]([^'"\\]*(\\.[^"\\]*)*)['"]/g,
BOOL: /^(?:true|false)$/i,
ID_MIN: 1,
ID_MAX: 0x1FFFFFFF
};
return Lang;
})();
/**
* Utilities to parse .proto files.
* @namespace
* @expose
*/
ProtoBuf.DotProto = {}; // Not present in "noparse" builds
/**
* @alias ProtoBuf.DotProto.Tokenizer
* @expose
*/
ProtoBuf.DotProto.Tokenizer = (function(Lang) {
/**
* Constructs a new Tokenizer.
* @exports ProtoBuf.DotProto.Tokenizer
* @class A ProtoBuf .proto Tokenizer.
* @param {string} proto Proto to tokenize
* @constructor
*/
var Tokenizer = function(proto) {
/**
* Source to parse.
* @type {string}
* @expose
*/
this.source = ""+proto;
/**
* Current index.
* @type {number}
* @expose
*/
this.index = 0;
/**
* Current line.
* @type {number}
* @expose
*/
this.line = 1;
/**
* Stacked values.
* @type {Array}
* @expose
*/
this.stack = [];
/**
* Whether currently reading a string or not.
* @type {boolean}
* @expose
*/
this.readingString = false;
/**
* Whatever character ends the string. Either a single or double quote character.
* @type {string}
* @expose
*/
this.stringEndsWith = Lang.STRINGCLOSE;
};
/**
* Reads a string beginning at the current index.
* @return {string} The string
* @throws {Error} If it's not a valid string
* @private
*/
Tokenizer.prototype._readString = function() {
Lang.STRING.lastIndex = this.index-1; // Include the open quote
var match;
if ((match = Lang.STRING.exec(this.source)) !== null) {
var s = match[1];
this.index = Lang.STRING.lastIndex;
this.stack.push(this.stringEndsWith);
return s;
}
throw(new Error("Illegal string value at line "+this.line+", index "+this.index));
};
/**
* Gets the next token and advances by one.
* @return {?string} Token or `null` on EOF
* @throws {Error} If it's not a valid proto file
* @expose
*/
Tokenizer.prototype.next = function() {
if (this.stack.length > 0) {
return this.stack.shift();
}
if (this.index >= this.source.length) {
return null; // No more tokens
}
if (this.readingString) {
this.readingString = false;
return this._readString();
}
var repeat, last;
do {
repeat = false;
// Strip white spaces
while (Lang.WHITESPACE.test(last = this.source.charAt(this.index))) {
this.index++;
if (last === "\n") this.line++;
if (this.index === this.source.length) return null;
}
// Strip comments
if (this.source.charAt(this.index) === '/') {
if (this.source.charAt(++this.index) === '/') { // Single line
while (this.source.charAt(this.index) !== "\n") {
this.index++;
if (this.index == this.source.length) return null;
}
this.index++;
this.line++;
repeat = true;
} else if (this.source.charAt(this.index) === '*') { /* Block */
last = '';
while (last+(last=this.source.charAt(this.index)) !== '*/') {
this.index++;
if (last === "\n") this.line++;
if (this.index === this.source.length) return null;
}
this.index++;
repeat = true;
} else {
throw(new Error("Invalid comment at line "+this.line+": /"+this.source.charAt(this.index)+" ('/' or '*' expected)"));
}
}
} while (repeat);
if (this.index === this.source.length) return null;
// Read the next token
var end = this.index;
Lang.DELIM.lastIndex = 0;
var delim = Lang.DELIM.test(this.source.charAt(end));
if (!delim) {
end++;
while(end < this.source.length && !Lang.DELIM.test(this.source.charAt(end))) {
end++;
}
} else {
end++;
}
var token = this.source.substring(this.index, this.index = end);
if (token === Lang.STRINGOPEN) {
this.readingString = true;
this.stringEndsWith = Lang.STRINGCLOSE;
} else if (token === Lang.STRINGOPEN_SQ) {
this.readingString = true;
this.stringEndsWith = Lang.STRINGCLOSE_SQ;
}
return token;
};
/**
* Peeks for the next token.
* @return {?string} Token or `null` on EOF
* @throws {Error} If it's not a valid proto file
* @expose
*/
Tokenizer.prototype.peek = function() {
if (this.stack.length == 0) {
var token = this.next();
if (token === null) return null;
this.stack.push(token);
}
return this.stack[0];
};
/**
* Returns a string representation of this object.
* @return {string} String representation as of "Tokenizer(index/length)"
* @expose
*/
Tokenizer.prototype.toString = function() {
return "Tokenizer("+this.index+"/"+this.source.length+" at line "+this.line+")";
};
return Tokenizer;
})(ProtoBuf.Lang);
/**
* @alias ProtoBuf.DotProto.Parser
* @expose
*/
ProtoBuf.DotProto.Parser = (function(ProtoBuf, Lang, Tokenizer) {
"use strict";
/**
* Constructs a new Parser.
* @exports ProtoBuf.DotProto.Parser
* @class A ProtoBuf .proto parser.
* @param {string} proto Protocol source
* @constructor
*/
var Parser = function(proto) {
/**
* Tokenizer.
* @type {ProtoBuf.DotProto.Tokenizer}
* @expose
*/
this.tn = new Tokenizer(proto);
};
/**
* Runs the parser.
* @return {{package: string|null, messages: Array.<object>, enums: Array.<object>, imports: Array.<string>, options: object<string,*>}}
* @throws {Error} If the source cannot be parsed
* @expose
*/
Parser.prototype.parse = function() {
var topLevel = {
"name": "[ROOT]", // temporary
"package": null,
"messages": [],
"enums": [],
"imports": [],
"options": {},
"services": []
};
var token, header = true;
do {
token = this.tn.next();
if (token == null) {
break; // No more messages
}
if (token == 'package') {
if (!header) {
throw(new Error("Illegal package definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
if (topLevel["package"] !== null) {
throw(new Error("Illegal package definition at line "+this.tn.line+": Package already declared"));
}
topLevel["package"] = this._parsePackage(token);
} else if (token == 'import') {
if (!header) {
throw(new Error("Illegal import definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
topLevel.imports.push(this._parseImport(token));
} else if (token === 'message') {
this._parseMessage(topLevel, token);
header = false;
} else if (token === 'enum') {
this._parseEnum(topLevel, token);
header = false;
} else if (token === 'option') {
if (!header) {
throw(new Error("Illegal option definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
this._parseOption(topLevel, token);
} else if (token === 'service') {
this._parseService(topLevel, token);
} else if (token === 'extend') {
this._parseExtend(topLevel, token);
} else if (token === 'syntax') {
this._parseIgnoredStatement(topLevel, token);
} else {
throw(new Error("Illegal top level declaration at line "+this.tn.line+": "+token));
}
} while (true);
delete topLevel["name"];
return topLevel;
};
/**
* Parses a number value.
* @param {string} val Number value to parse
* @return {number} Number
* @throws {Error} If the number value is invalid
* @private
*/
Parser.prototype._parseNumber = function(val) {
var sign = 1;
if (val.charAt(0) == '-') {
sign = -1; val = val.substring(1);
}
if (Lang.NUMBER_DEC.test(val)) {
return sign*parseInt(val, 10);
} else if (Lang.NUMBER_HEX.test(val)) {
return sign*parseInt(val.substring(2), 16);
} else if (Lang.NUMBER_OCT.test(val)) {
return sign*parseInt(val.substring(1), 8);
} else if (Lang.NUMBER_FLT.test(val)) {
return sign*parseFloat(val);
}
throw(new Error("Illegal number value at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
};
/**
* Parses an ID value.
* @param {string} val ID value to parse
* @param {boolean=} neg Whether the ID may be negative, defaults to `false`
* @returns {number} ID
* @throws {Error} If the ID value is invalid
* @private
*/
Parser.prototype._parseId = function(val, neg) {
var id = -1;
var sign = 1;
if (val.charAt(0) == '-') {
sign = -1; val = val.substring(1);
}
if (Lang.NUMBER_DEC.test(val)) {
id = parseInt(val);
} else if (Lang.NUMBER_HEX.test(val)) {
id = parseInt(val.substring(2), 16);
} else if (Lang.NUMBER_OCT.test(val)) {
id = parseInt(val.substring(1), 8);
} else {
throw(new Error("Illegal ID value at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
}
id = (sign*id)|0; // Force to 32bit
if (!neg && id < 0) {
throw(new Error("Illegal ID range at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
}
return id;
};
/**
* Parses the package definition.
* @param {string} token Initial token
* @return {string} Package name
* @throws {Error} If the package definition cannot be parsed
* @private
*/
Parser.prototype._parsePackage = function(token) {
token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal package name at line "+this.tn.line+": "+token));
}
var pkg = token;
token = this.tn.next();
if (token != Lang.END) {
throw(new Error("Illegal end of package definition at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
return pkg;
};
/**
* Parses an import definition.
* @param {string} token Initial token
* @return {string} Import file name
* @throws {Error} If the import definition cannot be parsed
* @private
*/
Parser.prototype._parseImport = function(token) {
token = this.tn.next();
if (token === "public") {
token = this.tn.next();
}
if (token !== Lang.STRINGOPEN && token !== Lang.STRINGOPEN_SQ) {
throw(new Error("Illegal begin of import value at line "+this.tn.line+": "+token+" ('"+Lang.STRINGOPEN+"' or '"+Lang.STRINGOPEN_SQ+"' expected)"));
}
var imported = this.tn.next();
token = this.tn.next();
if (token !== this.tn.stringEndsWith) {
throw(new Error("Illegal end of import value at line "+this.tn.line+": "+token+" ('"+this.tn.stringEndsWith+"' expected)"));
}
token = this.tn.next();
if (token !== Lang.END) {
throw(new Error("Illegal end of import definition at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
return imported;
};
/**
* Parses a namespace option.
* @param {Object} parent Parent definition
* @param {string} token Initial token
* @throws {Error} If the option cannot be parsed
* @private
*/
Parser.prototype._parseOption = function(parent, token) {
token = this.tn.next();
var custom = false;
if (token == Lang.COPTOPEN) {
custom = true;
token = this.tn.next();
}
if (!Lang.NAME.test(token)) {
// we can allow options of the form google.protobuf.* since they will just get ignored anyways
if (!/google\.protobuf\./.test(token)) {
throw(new Error("Illegal option name in message "+parent.name+" at line "+this.tn.line+": "+token));
}
}
var name = token;
token = this.tn.next();
if (custom) { // (my_method_option).foo, (my_method_option), some_method_option
if (token !== Lang.COPTCLOSE) {
throw(new Error("Illegal custom option name delimiter in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"));
}
name = '('+name+')';
token = this.tn.next();
if (Lang.FQTYPEREF.test(token)) {
name += token;
token = this.tn.next();
}
}
if (token !== Lang.EQUAL) {
throw(new Error("Illegal option operator in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.EQUAL+"' expected)"));
}
var value;
token = this.tn.next();
if (token === Lang.STRINGOPEN || token === Lang.STRINGOPEN_SQ) {
value = this.tn.next();
token = this.tn.next();
if (token !== this.tn.stringEndsWith) {
throw(new Error("Illegal end of option value in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+this.tn.stringEndsWith+"' expected)"));
}
} else {
if (Lang.NUMBER.test(token)) {
value = this._parseNumber(token, true);
} else if (Lang.TYPEREF.test(token)) {
value = token;
} else {
throw(new Error("Illegal option value in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token));
}
}
token = this.tn.next();
if (token !== Lang.END) {
throw(new Error("Illegal end of option in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
parent["options"][name] = value;
};
/**
* Parses an ignored block of the form ['keyword', 'typeref', '{' ... '}'].
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the directive cannot be parsed
* @private
*/
Parser.prototype._parseIgnoredBlock = function(parent, keyword) {
var token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal "+keyword+" type in "+parent.name+": "+token));
}
var name = token;
token = this.tn.next();
if (token !== Lang.OPEN) {
throw(new Error("Illegal OPEN in "+parent.name+" after "+keyword+" "+name+" at line "+this.tn.line+": "+token));
}
var depth = 1;
do {
token = this.tn.next();
if (token === null) {
throw(new Error("Unexpected EOF in "+parent.name+", "+keyword+" (ignored) at line "+this.tn.line+": "+name));
}
if (token === Lang.OPEN) {
depth++;
} else if (token === Lang.CLOSE) {
token = this.tn.peek();
if (token === Lang.END) this.tn.next();
depth--;
if (depth === 0) {
break;
}
}
} while(true);
};
/**
* Parses an ignored statement of the form ['keyword', ..., ';'].
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the directive cannot be parsed
* @private
*/
Parser.prototype._parseIgnoredStatement = function(parent, keyword) {
var token;
do {
token = this.tn.next();
if (token === null) {
throw(new Error("Unexpected EOF in "+parent.name+", "+keyword+" (ignored) at line "+this.tn.line));
}
if (token === Lang.END) break;
} while (true);
};
/**
* Parses a service definition.
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the service cannot be parsed
* @private
*/
Parser.prototype._parseService = function(parent, keyword) {
var token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal service name at line "+this.tn.line+": "+token));
}
var name = token;
var svc = {
"name": name,
"rpc": {},
"options": {}
};
token = this.tn.next();
if (token !== Lang.OPEN) {
throw(new Error("Illegal OPEN after service "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.OPEN+"' expected)"));
}
do {
token = this.tn.next();
if (token === "option") {
this._parseOption(svc, token);
} else if (token === 'rpc') {
this._parseServiceRPC(svc, token);
} else if (token !== Lang.CLOSE) {
throw(new Error("Illegal type for service "+name+" at line "+this.tn.line+": "+token));
}
} while (token !== Lang.CLOSE);
parent["services"].push(svc);
};
/**
* Parses a RPC service definition of the form ['rpc', name, (request), 'returns', (response)].
* @param {Object} svc Parent definition
* @param {string} token Initial token
* @private
*/
Parser.prototype._parseServiceRPC = function(svc, token) {
var type = token;
token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal RPC method name in service "+svc["name"]+" at line "+this.tn.line+": "+token));
}
var name = token;
var method = {
"request": null,
"response": null,
"options": {}
};
token = this.tn.next();
if (token !== Lang.COPTOPEN) {
throw(new Error("Illegal start of request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTOPEN+"' expected)"));
}
token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token));
}
method["request"] = token;
token = this.tn.next();
if (token != Lang.COPTCLOSE) {
throw(new Error("Illegal end of request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"))
}
token = this.tn.next();
if (token.toLowerCase() !== "returns") {
throw(new Error("Illegal request/response delimiter in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('returns' expected)"));
}
token = this.tn.next();
if (token != Lang.COPTOPEN) {
throw(new Error("Illegal start of response type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTOPEN+"' expected)"));
}
token = this.tn.next();
method["response"] = token;
token = this.tn.next();
if (token !== Lang.COPTCLOSE) {
throw(new Error("Illegal end of response type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"))
}
token = this.tn.next();
if (token === Lang.OPEN) {
do {
token = this.tn.next();
if (token === 'option') {
this._parseOption(method, token); // <- will fail for the custom-options example
} else if (token !== Lang.CLOSE) {
throw(new Error("Illegal start of option in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('option' expected)"));
}
} while (token !== Lang.CLOSE);
} else if (token !== Lang.END) {
throw(new Error("Illegal method delimiter in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.END+"' or '"+Lang.OPEN+"' expected)"));
}
if (typeof svc[type] === 'undefined') svc[type] = {};
svc[type][name] = method;
};
/**
* Parses a message definition.
* @param {Object} parent Parent definition
* @param {string} token First token
* @return {Object}
* @throws {Error} If the message cannot be parsed
* @private
*/
Parser.prototype._parseMessage = function(parent, token) {
/** @dict */
var msg = {}; // Note: At some point we might want to exclude the parser, so we need a dict.
token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal message name"+(parent ? " in message "+parent["name"] : "")+" at line "+this.tn.line+": "+token));
}
msg["name"] = token;
token = this.tn.next();
if (token != Lang.OPEN) {
throw(new Error("Illegal OPEN after message "+msg.name+" at line "+this.tn.line+": "+token+" ('"+Lang.OPEN+"' expected)"));
}
msg["fields"] = []; // Note: Using arrays to support also browser that cannot preserve order of object keys.
msg["enums"] = [];
msg["messages"] = [];
msg["options"] = {};
// msg["extensions"] = undefined
do {
token = this.tn.next();
if (token === Lang.CLOSE) {
token = this.tn.peek();
if (token === Lang.END) this.tn.next();
break;
} else if (Lang.RULE.test(token)) {
this._parseMessageField(msg, token);
} else if (token === "enum") {
this._parseEnum(msg, token);
} else if (token === "message") {
this._parseMessage(msg, token);
} else if (token === "option") {
this._parseOption(msg, token);
} else if (token === "extensions") {
msg["extensions"] = this._parseExtensions(msg, token);
} else if (token === "extend") {
this._parseExtend(msg, token);