Merge branch 'master' into dependabot/npm_and_yarn/mocha-8.0.1

Author: epoberezkin

.travis.yml

@@ -3,7 +3,6 @@ before_script:
   - git submodule update --init
   - npm install -g codeclimate-test-reporter
 node_js:
-  - 8
   - 10
   - 12
   - 14

README.md

@@ -82,6 +82,7 @@ ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));
 - [Getting started](#getting-started)
 - [Frequently Asked Questions](https://github.com/ajv-validator/ajv/blob/master/FAQ.md)
 - [Using in browser](#using-in-browser)
+  - [Ajv and Content Security Policies (CSP)](#ajv-and-content-security-policies-csp)
 - [Command line interface](#command-line-interface)
 - Validation
   - [Keywords](#validation-keywords)
@@ -238,6 +239,16 @@ Ajv is tested with these browsers:
 __Please note__: some frameworks, e.g. Dojo, may redefine global require in such way that is not compatible with CommonJS module format. In such case Ajv bundle has to be loaded before the framework and then you can use global Ajv (see issue [#234](https://github.com/ajv-validator/ajv/issues/234)).
 
 
+### Ajv and Content Security Policies (CSP)
+
+If you're using Ajv to compile a schema (the typical use) in a browser document that is loaded with a Content Security Policy (CSP), that policy will require a `script-src` directive that includes the value `'unsafe-eval'`.
+:warning: NOTE, however, that `unsafe-eval` is NOT recommended in a secure CSP[[1]](https://developer.chrome.com/extensions/contentSecurityPolicy#relaxing-eval), as it has the potential to open the document to cross-site scripting (XSS) attacks.
+
+In order to make use of Ajv without easing your CSP, you can [pre-compile a schema using the CLI](https://github.com/ajv-validator/ajv-cli#compile-schemas). This will transpile the schema JSON into a JavaScript file that exports a `validate` function that works simlarly to a schema compiled at runtime.
+
+Note that pre-compilation of schemas is performed using [ajv-pack](https://github.com/ajv-validator/ajv-pack) and there are [some limitations to the schema features it can compile](https://github.com/ajv-validator/ajv-pack#limitations). A successfully pre-compiled schema is equivalent to the same schema compiled at runtime.
+
+
 ## Command line interface
 
 CLI is available as a separate npm package [ajv-cli](https://github.com/ajv-validator/ajv-cli). It supports:
@@ -321,7 +332,7 @@ You can add additional formats and replace any of the formats above using [addFo
 
 The option `unknownFormats` allows changing the default behaviour when an unknown format is encountered. In this case Ajv can either fail schema compilation (default) or ignore it (default in versions before 5.0.0). You also can whitelist specific format(s) to be ignored. See [Options](#options) for details.
 
-You can find regular expressions used for format validation and the sources that were used in [formats.js](https://github.com/ajv-validatorv/ajv/blob/master/lib/compile/formats.js).
+You can find regular expressions used for format validation and the sources that were used in [formats.js](https://github.com/ajv-validator/ajv/blob/master/lib/compile/formats.js).
 
 
 ## <a name="ref"></a>Combining schemas with $ref
@@ -722,6 +733,10 @@ isSchemaSecure(schema2); // true
 __Please note__: following all these recommendation is not a guarantee that validation of untrusted data is safe - it can still lead to some undesirable results.
 
 
+##### Content Security Policies (CSP)
+See [Ajv and Content Security Policies (CSP)](#ajv-and-content-security-policies-csp)
+
+
 ## ReDoS attack
 
 Certain regular expressions can lead to the exponential evaluation time even with relatively short strings.

lib/compile/util.js

@@ -13,8 +13,6 @@ module.exports = {
   ucs2length: require('./ucs2length'),
   varOccurences: varOccurences,
   varReplace: varReplace,
-  cleanUpCode: cleanUpCode,
-  finalCleanUpCode: finalCleanUpCode,
   schemaHasRules: schemaHasRules,
   schemaHasRulesExcept: schemaHasRulesExcept,
   schemaUnknownRules: schemaUnknownRules,
@@ -139,42 +137,6 @@ function varReplace(str, dataVar, expr) {
 }
 
 
-var EMPTY_ELSE = /else\s*{\s*}/g
-  , EMPTY_IF_NO_ELSE = /if\s*\([^)]+\)\s*\{\s*\}(?!\s*else)/g
-  , EMPTY_IF_WITH_ELSE = /if\s*\(([^)]+)\)\s*\{\s*\}\s*else(?!\s*if)/g;
-function cleanUpCode(out) {
-  return out.replace(EMPTY_ELSE, '')
-            .replace(EMPTY_IF_NO_ELSE, '')
-            .replace(EMPTY_IF_WITH_ELSE, 'if (!($1))');
-}
-
-
-var ERRORS_REGEXP = /[^v.]errors/g
-  , REMOVE_ERRORS = /var errors = 0;|var vErrors = null;|validate.errors = vErrors;/g
-  , REMOVE_ERRORS_ASYNC = /var errors = 0;|var vErrors = null;/g
-  , RETURN_VALID = 'return errors === 0;'
-  , RETURN_TRUE = 'validate.errors = null; return true;'
-  , RETURN_ASYNC = /if \(errors === 0\) return data;\s*else throw new ValidationError\(vErrors\);/
-  , RETURN_DATA_ASYNC = 'return data;'
-  , ROOTDATA_REGEXP = /[^A-Za-z_$]rootData[^A-Za-z0-9_$]/g
-  , REMOVE_ROOTDATA = /if \(rootData === undefined\) rootData = data;/;
-
-function finalCleanUpCode(out, async) {
-  var matches = out.match(ERRORS_REGEXP);
-  if (matches && matches.length == 2) {
-    out = async
-          ? out.replace(REMOVE_ERRORS_ASYNC, '')
-               .replace(RETURN_ASYNC, RETURN_DATA_ASYNC)
-          : out.replace(REMOVE_ERRORS, '')
-               .replace(RETURN_VALID, RETURN_TRUE);
-  }
-
-  matches = out.match(ROOTDATA_REGEXP);
-  if (!matches || matches.length !== 3) return out;
-  return out.replace(REMOVE_ROOTDATA, '');
-}
-
-
 function schemaHasRules(schema, rules) {
   if (typeof schema == 'boolean') return !schema;
   for (var key in schema) if (rules[key]) return true;
@@ -253,7 +215,7 @@ function getData($data, lvl, paths) {
 
 function joinPaths (a, b) {
   if (a == '""') return b;
-  return (a + ' + ' + b).replace(/' \+ '/g, '');
+  return (a + ' + ' + b).replace(/([^\\])' \+ '/g, '$1');
 }
 
 

lib/dot/_limit.jst

@@ -17,6 +17,15 @@
     , $op = $isMax ? '<' : '>'
     , $notOp = $isMax ? '>' : '<'
     , $errorKeyword = undefined;
+
+  if (!($isData || typeof $schema == 'number' || $schema === undefined)) {
+    throw new Error($keyword + ' must be number');
+  }
+  if (!($isDataExcl || $schemaExcl === undefined
+                    || typeof $schemaExcl == 'number'
+                    || typeof $schemaExcl == 'boolean')) {
+    throw new Error($exclusiveKeyword + ' must be number or boolean');
+  }
 }}
 
 {{? $isDataExcl }}

lib/dot/_limitItems.jst

@@ -3,6 +3,8 @@
 {{# def.setupKeyword }}
 {{# def.$data }}
 
+{{# def.numberKeyword }}
+
 {{ var $op = $keyword == 'maxItems' ? '>' : '<'; }}
 if ({{# def.$dataNotType:'number' }} {{=$data}}.length {{=$op}} {{=$schemaValue}}) {
   {{ var $errorKeyword = $keyword; }}

lib/dot/_limitLength.jst

@@ -3,6 +3,8 @@
 {{# def.setupKeyword }}
 {{# def.$data }}
 
+{{# def.numberKeyword }}
+
 {{ var $op = $keyword == 'maxLength' ? '>' : '<'; }}
 if ({{# def.$dataNotType:'number' }} {{# def.strLength }} {{=$op}} {{=$schemaValue}}) {
   {{ var $errorKeyword = $keyword; }}

lib/dot/_limitProperties.jst

@@ -3,6 +3,8 @@
 {{# def.setupKeyword }}
 {{# def.$data }}
 
+{{# def.numberKeyword }}
+
 {{ var $op = $keyword == 'maxProperties' ? '>' : '<'; }}
 if ({{# def.$dataNotType:'number' }} Object.keys({{=$data}}).length {{=$op}} {{=$schemaValue}}) {
   {{ var $errorKeyword = $keyword; }}

lib/dot/allOf.jst

@@ -30,5 +30,3 @@
     {{= $closingBraces.slice(0,-1) }}
   {{?}}
 {{?}}
-
-{{# def.cleanUp }}

lib/dot/anyOf.jst

@@ -39,8 +39,6 @@
   } else {
     {{# def.resetErrors }}
   {{? it.opts.allErrors }} } {{?}}
-
-  {{# def.cleanUp }}
 {{??}}
   {{? $breakOnError }}
     if (true) {

lib/dot/contains.jst

@@ -53,5 +53,3 @@ var {{=$valid}};
       {{# def.resetErrors }}
     {{?}}
   {{? it.opts.allErrors }} } {{?}}
-
-{{# def.cleanUp }}