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node_modules/sqlstring/HISTORY.md generated vendored Normal file
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2.3.1 / 2018-02-24
==================
* Fix incorrectly replacing non-placeholders in SQL
2.3.0 / 2017-10-01
==================
* Add `.toSqlString()` escape overriding
* Add `raw` method to wrap raw strings for escape overriding
* Small performance improvement on `escapeId`
2.2.0 / 2016-11-01
==================
* Escape invalid `Date` objects as `NULL`
2.1.0 / 2016-09-26
==================
* Accept numbers and other value types in `escapeId`
* Run `buffer.toString()` through escaping
2.0.1 / 2016-06-06
==================
* Fix npm package to include missing `lib/` directory
2.0.0 / 2016-06-06
==================
* Bring repository up-to-date with `mysql` module changes
* Support Node.js 0.6.x
1.0.0 / 2014-11-09
==================
* Support Node.js 0.8.x
0.0.1 / 2014-02-25
==================
* Initial release

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Copyright (c) 2012 Felix Geisendörfer (felix@debuggable.com) and contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# sqlstring
[![NPM Version][npm-version-image]][npm-url]
[![NPM Downloads][npm-downloads-image]][npm-url]
[![Node.js Version][node-image]][node-url]
[![Build Status][travis-image]][travis-url]
[![Coverage Status][coveralls-image]][coveralls-url]
Simple SQL escape and format for MySQL
## Install
```sh
$ npm install sqlstring
```
## Usage
<!-- eslint-disable no-unused-vars -->
```js
var SqlString = require('sqlstring');
```
### Escaping query values
**Caution** These methods of escaping values only works when the
[NO_BACKSLASH_ESCAPES](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_no_backslash_escapes)
SQL mode is disabled (which is the default state for MySQL servers).
In order to avoid SQL Injection attacks, you should always escape any user
provided data before using it inside a SQL query. You can do so using the
`SqlString.escape()` method:
```js
var userId = 'some user provided value';
var sql = 'SELECT * FROM users WHERE id = ' + SqlString.escape(userId);
console.log(sql); // SELECT * FROM users WHERE id = 'some user provided value'
```
Alternatively, you can use `?` characters as placeholders for values you would
like to have escaped like this:
```js
var userId = 1;
var sql = SqlString.format('SELECT * FROM users WHERE id = ?', [userId]);
console.log(sql); // SELECT * FROM users WHERE id = 1
```
Multiple placeholders are mapped to values in the same order as passed. For example,
in the following query `foo` equals `a`, `bar` equals `b`, `baz` equals `c`, and
`id` will be `userId`:
```js
var userId = 1;
var sql = SqlString.format('UPDATE users SET foo = ?, bar = ?, baz = ? WHERE id = ?',
['a', 'b', 'c', userId]);
console.log(sql); // UPDATE users SET foo = 'a', bar = 'b', baz = 'c' WHERE id = 1
```
This looks similar to prepared statements in MySQL, however it really just uses
the same `SqlString.escape()` method internally.
**Caution** This also differs from prepared statements in that all `?` are
replaced, even those contained in comments and strings.
Different value types are escaped differently, here is how:
* Numbers are left untouched
* Booleans are converted to `true` / `false`
* Date objects are converted to `'YYYY-mm-dd HH:ii:ss'` strings
* Buffers are converted to hex strings, e.g. `X'0fa5'`
* Strings are safely escaped
* Arrays are turned into list, e.g. `['a', 'b']` turns into `'a', 'b'`
* Nested arrays are turned into grouped lists (for bulk inserts), e.g. `[['a',
'b'], ['c', 'd']]` turns into `('a', 'b'), ('c', 'd')`
* Objects that have a `toSqlString` method will have `.toSqlString()` called
and the returned value is used as the raw SQL.
* Objects are turned into `key = 'val'` pairs for each enumerable property on
the object. If the property's value is a function, it is skipped; if the
property's value is an object, toString() is called on it and the returned
value is used.
* `undefined` / `null` are converted to `NULL`
* `NaN` / `Infinity` are left as-is. MySQL does not support these, and trying
to insert them as values will trigger MySQL errors until they implement
support.
You may have noticed that this escaping allows you to do neat things like this:
```js
var post = {id: 1, title: 'Hello MySQL'};
var sql = SqlString.format('INSERT INTO posts SET ?', post);
console.log(sql); // INSERT INTO posts SET `id` = 1, `title` = 'Hello MySQL'
```
And the `toSqlString` method allows you to form complex queries with functions:
```js
var CURRENT_TIMESTAMP = { toSqlString: function() { return 'CURRENT_TIMESTAMP()'; } };
var sql = SqlString.format('UPDATE posts SET modified = ? WHERE id = ?', [CURRENT_TIMESTAMP, 42]);
console.log(sql); // UPDATE posts SET modified = CURRENT_TIMESTAMP() WHERE id = 42
```
To generate objects with a `toSqlString` method, the `SqlString.raw()` method can
be used. This creates an object that will be left un-touched when using in a `?`
placeholder, useful for using functions as dynamic values:
**Caution** The string provided to `SqlString.raw()` will skip all escaping
functions when used, so be careful when passing in unvalidated input.
```js
var CURRENT_TIMESTAMP = SqlString.raw('CURRENT_TIMESTAMP()');
var sql = SqlString.format('UPDATE posts SET modified = ? WHERE id = ?', [CURRENT_TIMESTAMP, 42]);
console.log(sql); // UPDATE posts SET modified = CURRENT_TIMESTAMP() WHERE id = 42
```
If you feel the need to escape queries by yourself, you can also use the escaping
function directly:
```js
var sql = 'SELECT * FROM posts WHERE title=' + SqlString.escape('Hello MySQL');
console.log(sql); // SELECT * FROM posts WHERE title='Hello MySQL'
```
### Escaping query identifiers
If you can't trust an SQL identifier (database / table / column name) because it is
provided by a user, you should escape it with `SqlString.escapeId(identifier)` like this:
```js
var sorter = 'date';
var sql = 'SELECT * FROM posts ORDER BY ' + SqlString.escapeId(sorter);
console.log(sql); // SELECT * FROM posts ORDER BY `date`
```
It also supports adding qualified identifiers. It will escape both parts.
```js
var sorter = 'date';
var sql = 'SELECT * FROM posts ORDER BY ' + SqlString.escapeId('posts.' + sorter);
console.log(sql); // SELECT * FROM posts ORDER BY `posts`.`date`
```
If you do not want to treat `.` as qualified identifiers, you can set the second
argument to `true` in order to keep the string as a literal identifier:
```js
var sorter = 'date.2';
var sql = 'SELECT * FROM posts ORDER BY ' + SqlString.escapeId(sorter, true);
console.log(sql); // SELECT * FROM posts ORDER BY `date.2`
```
Alternatively, you can use `??` characters as placeholders for identifiers you would
like to have escaped like this:
```js
var userId = 1;
var columns = ['username', 'email'];
var sql = SqlString.format('SELECT ?? FROM ?? WHERE id = ?', [columns, 'users', userId]);
console.log(sql); // SELECT `username`, `email` FROM `users` WHERE id = 1
```
**Please note that this last character sequence is experimental and syntax might change**
When you pass an Object to `.escape()` or `.format()`, `.escapeId()` is used to avoid SQL injection in object keys.
### Formatting queries
You can use `SqlString.format` to prepare a query with multiple insertion points,
utilizing the proper escaping for ids and values. A simple example of this follows:
```js
var userId = 1;
var inserts = ['users', 'id', userId];
var sql = SqlString.format('SELECT * FROM ?? WHERE ?? = ?', inserts);
console.log(sql); // SELECT * FROM `users` WHERE `id` = 1
```
Following this you then have a valid, escaped query that you can then send to the database safely.
This is useful if you are looking to prepare the query before actually sending it to the database.
You also have the option (but are not required) to pass in `stringifyObject` and `timeZone`,
allowing you provide a custom means of turning objects into strings, as well as a
location-specific/timezone-aware `Date`.
This can be further combined with the `SqlString.raw()` helper to generate SQL
that includes MySQL functions as dynamic vales:
```js
var userId = 1;
var data = { email: 'foobar@example.com', modified: SqlString.raw('NOW()') };
var sql = SqlString.format('UPDATE ?? SET ? WHERE `id` = ?', ['users', data, userId]);
console.log(sql); // UPDATE `users` SET `email` = 'foobar@example.com', `modified` = NOW() WHERE `id` = 1
```
## License
[MIT](LICENSE)
[npm-version-image]: https://img.shields.io/npm/v/sqlstring.svg
[npm-downloads-image]: https://img.shields.io/npm/dm/sqlstring.svg
[npm-url]: https://npmjs.org/package/sqlstring
[travis-image]: https://img.shields.io/travis/mysqljs/sqlstring/master.svg
[travis-url]: https://travis-ci.org/mysqljs/sqlstring
[coveralls-image]: https://img.shields.io/coveralls/mysqljs/sqlstring/master.svg
[coveralls-url]: https://coveralls.io/r/mysqljs/sqlstring?branch=master
[node-image]: https://img.shields.io/node/v/sqlstring.svg
[node-url]: https://nodejs.org/en/download

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module.exports = require('./lib/SqlString');

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var SqlString = exports;
var ID_GLOBAL_REGEXP = /`/g;
var QUAL_GLOBAL_REGEXP = /\./g;
var CHARS_GLOBAL_REGEXP = /[\0\b\t\n\r\x1a\"\'\\]/g; // eslint-disable-line no-control-regex
var CHARS_ESCAPE_MAP = {
'\0' : '\\0',
'\b' : '\\b',
'\t' : '\\t',
'\n' : '\\n',
'\r' : '\\r',
'\x1a' : '\\Z',
'"' : '\\"',
'\'' : '\\\'',
'\\' : '\\\\'
};
SqlString.escapeId = function escapeId(val, forbidQualified) {
if (Array.isArray(val)) {
var sql = '';
for (var i = 0; i < val.length; i++) {
sql += (i === 0 ? '' : ', ') + SqlString.escapeId(val[i], forbidQualified);
}
return sql;
} else if (forbidQualified) {
return '`' + String(val).replace(ID_GLOBAL_REGEXP, '``') + '`';
} else {
return '`' + String(val).replace(ID_GLOBAL_REGEXP, '``').replace(QUAL_GLOBAL_REGEXP, '`.`') + '`';
}
};
SqlString.escape = function escape(val, stringifyObjects, timeZone) {
if (val === undefined || val === null) {
return 'NULL';
}
switch (typeof val) {
case 'boolean': return (val) ? 'true' : 'false';
case 'number': return val + '';
case 'object':
if (val instanceof Date) {
return SqlString.dateToString(val, timeZone || 'local');
} else if (Array.isArray(val)) {
return SqlString.arrayToList(val, timeZone);
} else if (Buffer.isBuffer(val)) {
return SqlString.bufferToString(val);
} else if (typeof val.toSqlString === 'function') {
return String(val.toSqlString());
} else if (stringifyObjects) {
return escapeString(val.toString());
} else {
return SqlString.objectToValues(val, timeZone);
}
default: return escapeString(val);
}
};
SqlString.arrayToList = function arrayToList(array, timeZone) {
var sql = '';
for (var i = 0; i < array.length; i++) {
var val = array[i];
if (Array.isArray(val)) {
sql += (i === 0 ? '' : ', ') + '(' + SqlString.arrayToList(val, timeZone) + ')';
} else {
sql += (i === 0 ? '' : ', ') + SqlString.escape(val, true, timeZone);
}
}
return sql;
};
SqlString.format = function format(sql, values, stringifyObjects, timeZone) {
if (values == null) {
return sql;
}
if (!(values instanceof Array || Array.isArray(values))) {
values = [values];
}
var chunkIndex = 0;
var placeholdersRegex = /\?+/g;
var result = '';
var valuesIndex = 0;
var match;
while (valuesIndex < values.length && (match = placeholdersRegex.exec(sql))) {
var len = match[0].length;
if (len > 2) {
continue;
}
var value = len === 2
? SqlString.escapeId(values[valuesIndex])
: SqlString.escape(values[valuesIndex], stringifyObjects, timeZone);
result += sql.slice(chunkIndex, match.index) + value;
chunkIndex = placeholdersRegex.lastIndex;
valuesIndex++;
}
if (chunkIndex === 0) {
// Nothing was replaced
return sql;
}
if (chunkIndex < sql.length) {
return result + sql.slice(chunkIndex);
}
return result;
};
SqlString.dateToString = function dateToString(date, timeZone) {
var dt = new Date(date);
if (isNaN(dt.getTime())) {
return 'NULL';
}
var year;
var month;
var day;
var hour;
var minute;
var second;
var millisecond;
if (timeZone === 'local') {
year = dt.getFullYear();
month = dt.getMonth() + 1;
day = dt.getDate();
hour = dt.getHours();
minute = dt.getMinutes();
second = dt.getSeconds();
millisecond = dt.getMilliseconds();
} else {
var tz = convertTimezone(timeZone);
if (tz !== false && tz !== 0) {
dt.setTime(dt.getTime() + (tz * 60000));
}
year = dt.getUTCFullYear();
month = dt.getUTCMonth() + 1;
day = dt.getUTCDate();
hour = dt.getUTCHours();
minute = dt.getUTCMinutes();
second = dt.getUTCSeconds();
millisecond = dt.getUTCMilliseconds();
}
// YYYY-MM-DD HH:mm:ss.mmm
var str = zeroPad(year, 4) + '-' + zeroPad(month, 2) + '-' + zeroPad(day, 2) + ' ' +
zeroPad(hour, 2) + ':' + zeroPad(minute, 2) + ':' + zeroPad(second, 2) + '.' +
zeroPad(millisecond, 3);
return escapeString(str);
};
SqlString.bufferToString = function bufferToString(buffer) {
return 'X' + escapeString(buffer.toString('hex'));
};
SqlString.objectToValues = function objectToValues(object, timeZone) {
var sql = '';
for (var key in object) {
var val = object[key];
if (typeof val === 'function') {
continue;
}
sql += (sql.length === 0 ? '' : ', ') + SqlString.escapeId(key) + ' = ' + SqlString.escape(val, true, timeZone);
}
return sql;
};
SqlString.raw = function raw(sql) {
if (typeof sql !== 'string') {
throw new TypeError('argument sql must be a string');
}
return {
toSqlString: function toSqlString() { return sql; }
};
};
function escapeString(val) {
var chunkIndex = CHARS_GLOBAL_REGEXP.lastIndex = 0;
var escapedVal = '';
var match;
while ((match = CHARS_GLOBAL_REGEXP.exec(val))) {
escapedVal += val.slice(chunkIndex, match.index) + CHARS_ESCAPE_MAP[match[0]];
chunkIndex = CHARS_GLOBAL_REGEXP.lastIndex;
}
if (chunkIndex === 0) {
// Nothing was escaped
return "'" + val + "'";
}
if (chunkIndex < val.length) {
return "'" + escapedVal + val.slice(chunkIndex) + "'";
}
return "'" + escapedVal + "'";
}
function zeroPad(number, length) {
number = number.toString();
while (number.length < length) {
number = '0' + number;
}
return number;
}
function convertTimezone(tz) {
if (tz === 'Z') {
return 0;
}
var m = tz.match(/([\+\-\s])(\d\d):?(\d\d)?/);
if (m) {
return (m[1] === '-' ? -1 : 1) * (parseInt(m[2], 10) + ((m[3] ? parseInt(m[3], 10) : 0) / 60)) * 60;
}
return false;
}

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{
"_from": "sqlstring@2.3.1",
"_id": "sqlstring@2.3.1",
"_inBundle": false,
"_integrity": "sha1-R1OT/56RR5rqYtyvDKPRSYOn+0A=",
"_location": "/sqlstring",
"_phantomChildren": {},
"_requested": {
"type": "version",
"registry": true,
"raw": "sqlstring@2.3.1",
"name": "sqlstring",
"escapedName": "sqlstring",
"rawSpec": "2.3.1",
"saveSpec": null,
"fetchSpec": "2.3.1"
},
"_requiredBy": [
"/mysql"
],
"_resolved": "https://registry.npmjs.org/sqlstring/-/sqlstring-2.3.1.tgz",
"_shasum": "475393ff9e91479aea62dcaf0ca3d14983a7fb40",
"_spec": "sqlstring@2.3.1",
"_where": "/Users/Luca_Schwan/Desktop/DSABot/node_modules/mysql",
"bugs": {
"url": "https://github.com/mysqljs/sqlstring/issues"
},
"bundleDependencies": false,
"contributors": [
{
"name": "Adri Van Houdt",
"email": "adri.van.houdt@gmail.com"
},
{
"name": "Douglas Christopher Wilson",
"email": "doug@somethingdoug.com"
},
{
"name": "fengmk2",
"email": "fengmk2@gmail.com",
"url": "http://fengmk2.github.com"
},
{
"name": "Kevin Jose Martin",
"email": "kevin@tiliq.com"
},
{
"name": "Nathan Woltman",
"email": "nwoltman@outlook.com"
},
{
"name": "Sergej Sintschilin",
"email": "seregpie@gmail.com"
}
],
"deprecated": false,
"description": "Simple SQL escape and format for MySQL",
"devDependencies": {
"beautify-benchmark": "0.2.4",
"benchmark": "2.1.4",
"eslint": "4.18.1",
"eslint-plugin-markdown": "1.0.0-beta.6",
"nyc": "10.3.2",
"urun": "0.0.8",
"utest": "0.0.8"
},
"engines": {
"node": ">= 0.6"
},
"files": [
"lib/",
"HISTORY.md",
"LICENSE",
"README.md",
"index.js"
],
"homepage": "https://github.com/mysqljs/sqlstring#readme",
"keywords": [
"sqlstring",
"sql",
"escape",
"sql escape"
],
"license": "MIT",
"name": "sqlstring",
"repository": {
"type": "git",
"url": "git+https://github.com/mysqljs/sqlstring.git"
},
"scripts": {
"bench": "node benchmark/index.js",
"lint": "eslint --plugin markdown --ext js,md .",
"test": "node test/run.js",
"test-ci": "nyc --reporter=text npm test",
"test-cov": "nyc --reporter=html --reporter=text npm test"
},
"version": "2.3.1"
}