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verify.js
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verify.js
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"use strict";
module.exports = verify;
var Enum = require("./enum"),
Type = require("./type"),
util = require("./util");
var isInteger = util.isInteger;
function invalid(field, expected) {
return "invalid value for field " + field.getFullName() + " (" + expected + (field.repeated && expected !== "array" ? "[]" : field.map && expected !== "object" ? "{k:"+field.keyType+"}" : "") + " expected)";
}
function verifyValue(field, value) {
switch (field.type) {
case "double":
case "float":
if (typeof value !== 'number')
return invalid(field, "number");
break;
case "int32":
case "uint32":
case "sint32":
case "fixed32":
case "sfixed32":
if (!isInteger(value))
return invalid(field, "integer");
break;
case "int64":
case "uint64":
case "sint64":
case "fixed64":
case "sfixed64":
if (!(isInteger(value) || value && isInteger(value.low) && isInteger(value.high)))
return invalid(field, "integer|Long");
break;
case "bool":
if (typeof value !== 'boolean')
return invalid(field, "boolean");
break;
case "string":
if (!util.isString(value))
return invalid(field, "string");
break;
case "bytes":
if (!(value && typeof value.length === 'number' || util.isString(value)))
return invalid(field, "buffer");
break;
default:
if (field.resolvedType instanceof Enum) {
if (typeof field.resolvedType.getValuesById()[value] !== 'number')
return invalid(field, "enum value");
} else if (field.resolvedType instanceof Type) {
var reason = field.resolvedType.verify(value);
if (reason)
return reason;
}
break;
}
return null;
}
function verifyKey(field, value) {
switch (field.keyType) {
case "int64":
case "uint64":
case "sint64":
case "fixed64":
case "sfixed64":
if (/^[\x00-\xff]{8}$/.test(value)) // eslint-disable-line no-control-regex
return null;
// fallthrough
case "int32":
case "uint32":
case "sint32":
case "fixed32":
case "sfixed32":
if (/^-?(?:0|[1-9]\d*)$/.test(value))
return invalid(field, "integer key");
break;
case "bool":
if (/^true|false|0|1$/.test(value))
return invalid(field, "boolean key");
break;
}
return null;
}
/**
* General purpose message verifier.
* @param {Message|Object} message Runtime message or plain object to verify
* @returns {?string} `null` if valid, otherwise the reason why it is not
* @this {Type}
* @property {GenerateVerifier} generate Generates a type specific verifier
*/
function verify(message) {
/* eslint-disable block-scoped-var, no-redeclare */
var fields = this.getFieldsArray(),
i = 0,
reason;
while (i < fields.length) {
var field = fields[i++].resolve(),
value = message[field.name];
// map fields
if (field.map) {
if (value !== undefined) {
if (!util.isObject(value))
return invalid(field, "object");
var keys = Object.keys(value);
for (var j = 0; j < keys.length; ++j) {
if (reason = verifyKey(field, keys[j])) // eslint-disable-line no-cond-assign
return reason;
if (reason = verifyValue(field, value[keys[j]])) // eslint-disable-line no-cond-assign
return reason;
}
}
// repeated fields
} else if (field.repeated) {
if (value !== undefined) {
if (!Array.isArray(value))
return invalid(field, "array");
for (var j = 0; j < value.length; ++j)
if (reason = verifyValue(field, value[j])) // eslint-disable-line no-cond-assign
return reason;
}
// required or present fields
} else if (field.required || value !== undefined) {
if (reason = verifyValue(field, value)) // eslint-disable-line no-cond-assign
return reason;
}
}
return null;
/* eslint-enable block-scoped-var, no-redeclare */
}
function genVerifyValue(gen, field, fieldIndex, ref) {
/* eslint-disable no-unexpected-multiline */
switch (field.type) {
case "double":
case "float": gen
("if(typeof %s!=='number')", ref)
("return%j", invalid(field, "number"));
break;
case "int32":
case "uint32":
case "sint32":
case "fixed32":
case "sfixed32": gen
("if(!util.isInteger(%s))", ref)
("return%j", invalid(field, "integer"));
break;
case "int64":
case "uint64":
case "sint64":
case "fixed64":
case "sfixed64": gen
("if(!(util.isInteger(%s)||%s&&util.isInteger(%s.low)&&util.isInteger(%s.high)))", ref, ref, ref, ref)
("return%j", invalid(field, "integer|Long"));
break;
case "bool": gen
("if(typeof %s!=='boolean')", ref)
("return%j", invalid(field, "boolean"));
break;
case "string": gen
("if(!util.isString(%s))", ref)
("return%j", invalid(field, "string"));
break;
case "bytes": gen
("if(!(%s&&typeof %s.length==='number'||util.isString(%s)))", ref, ref, ref)
("return%j", invalid(field, "buffer"));
break;
default:
if (field.resolvedType instanceof Enum) { gen
("switch(%s){", ref)
("default:")
("return%j", invalid(field, "enum value"));
var values = util.toArray(field.resolvedType.values);
for (var j = 0; j < values.length; ++j) gen
("case %d:", values[j]);
gen
("break")
("}");
} else if (field.resolvedType instanceof Type) { gen
("var r;")
("if(r=types[%d].verify(%s))", fieldIndex, ref)
("return r");
}
break;
}
/* eslint-enable no-unexpected-multiline */
}
function genVerifyKey(gen, field, ref) {
/* eslint-disable no-unexpected-multiline */
switch (field.keyType) {
case "int64":
case "uint64":
case "sint64":
case "fixed64":
case "sfixed64": gen
("if(!/^(?:[\\x00-\\xff]{8}|-?(?:0|[1-9]\\d*))$/.test(%s))", ref)
("return%j", invalid(field, "integer|Long key"));
break;
case "int32":
case "uint32":
case "sint32":
case "fixed32":
case "sfixed32": gen
("if(!/^-?(?:0|[1-9]\\d*)$/.test(%s))", ref)
("return%j", invalid(field, "integer key"));
break;
case "bool": gen
("if(!/^true|false|0|1$/.test(%s))", ref)
("return%j", invalid(field, "boolean key"));
break;
}
/* eslint-enable no-unexpected-multiline */
}
/**
* Generates a verifier specific to the specified message type.
* @typedef GenerateVerifier
* @type {function}
* @param {Type} mtype Message type
* @returns {Codegen} Codegen instance
*/
/**/
verify.generate = function generate(mtype) {
/* eslint-disable no-unexpected-multiline */
var fields = mtype.getFieldsArray();
var gen = util.codegen("m");
for (var i = 0; i < fields.length; ++i) {
var field = fields[i].resolve(),
prop = util.safeProp(field.name);
// map fields
if (field.map) { gen
("if(m%s!==undefined){", prop)
("if(!util.isObject(m%s))", prop)
("return%j", invalid(field, "object"))
("var k=Object.keys(m%s)", prop)
("for(var i=0;i<k.length;++i){");
genVerifyKey(gen, field, "k[i]");
genVerifyValue(gen, field, i, "m" + prop + "[k[i]]");
gen
("}")
("}");
// repeated fields
} else if (field.repeated) { gen
("if(m%s!==undefined){", prop)
("if(!Array.isArray(m%s))", prop)
("return%j", invalid(field, "array"))
("for(var i=0;i<m%s.length;++i){", prop);
genVerifyValue(gen, field, i, "m" + prop + "[i]"); gen
("}")
("}");
// required or present fields
} else {
if (!field.required) gen
("if(m%s!==undefined){", prop);
genVerifyValue(gen, field, i, "m" + prop);
if (!field.required) gen
("}");
}
}
return gen
("return null");
/* eslint-enable no-unexpected-multiline */
};