863 lines
31 KiB
C++
863 lines
31 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "components/json_schema/json_schema_validator.h"
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#include <stddef.h>
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#include <algorithm>
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#include <cfloat>
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#include <cmath>
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#include <memory>
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#include <vector>
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#include "base/json/json_reader.h"
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#include "base/logging.h"
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#include "base/macros.h"
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#include "base/memory/ptr_util.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/string_util.h"
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#include "base/strings/stringprintf.h"
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#include "base/values.h"
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#include "components/json_schema/json_schema_constants.h"
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#include "third_party/re2/src/re2/re2.h"
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namespace schema = json_schema_constants;
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namespace {
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double GetNumberValue(const base::Value* value) {
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double result = 0;
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CHECK(value->GetAsDouble(&result))
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<< "Unexpected value type: " << value->type();
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return result;
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}
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bool IsValidType(const std::string& type) {
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static const char* kValidTypes[] = {
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schema::kAny,
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schema::kArray,
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schema::kBoolean,
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schema::kInteger,
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schema::kNull,
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schema::kNumber,
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schema::kObject,
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schema::kString,
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};
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const char** end = kValidTypes + arraysize(kValidTypes);
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return std::find(kValidTypes, end, type) != end;
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}
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// Maps a schema attribute name to its expected type.
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struct ExpectedType {
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const char* key;
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base::Value::Type type;
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};
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// Helper for std::lower_bound.
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bool CompareToString(const ExpectedType& entry, const std::string& key) {
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return entry.key < key;
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}
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// If |value| is a dictionary, returns the "name" attribute of |value| or NULL
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// if |value| does not contain a "name" attribute. Otherwise, returns |value|.
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const base::Value* ExtractNameFromDictionary(const base::Value* value) {
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const base::DictionaryValue* value_dict = nullptr;
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const base::Value* name_value = nullptr;
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if (value->GetAsDictionary(&value_dict)) {
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value_dict->Get("name", &name_value);
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return name_value;
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}
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return value;
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}
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bool IsValidSchema(const base::DictionaryValue* dict,
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int options,
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std::string* error) {
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// This array must be sorted, so that std::lower_bound can perform a
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// binary search.
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static const ExpectedType kExpectedTypes[] = {
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// Note: kRef == "$ref", kSchema == "$schema"
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{ schema::kRef, base::Value::Type::STRING },
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{ schema::kSchema, base::Value::Type::STRING },
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{ schema::kAdditionalProperties, base::Value::Type::DICTIONARY },
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{ schema::kChoices, base::Value::Type::LIST },
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{ schema::kDescription, base::Value::Type::STRING },
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{ schema::kEnum, base::Value::Type::LIST },
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{ schema::kId, base::Value::Type::STRING },
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{ schema::kMaxItems, base::Value::Type::INTEGER },
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{ schema::kMaxLength, base::Value::Type::INTEGER },
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{ schema::kMaximum, base::Value::Type::DOUBLE },
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{ schema::kMinItems, base::Value::Type::INTEGER },
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{ schema::kMinLength, base::Value::Type::INTEGER },
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{ schema::kMinimum, base::Value::Type::DOUBLE },
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{ schema::kOptional, base::Value::Type::BOOLEAN },
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{ schema::kPattern, base::Value::Type::STRING },
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{ schema::kPatternProperties, base::Value::Type::DICTIONARY },
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{ schema::kProperties, base::Value::Type::DICTIONARY },
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{ schema::kRequired, base::Value::Type::LIST },
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{ schema::kTitle, base::Value::Type::STRING },
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};
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bool has_type_or_ref = false;
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const base::ListValue* list_value = nullptr;
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const base::DictionaryValue* dictionary_value = nullptr;
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std::string string_value;
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for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
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// Validate the "type" attribute, which may be a string or a list.
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if (it.key() == schema::kType) {
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switch (it.value().type()) {
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case base::Value::Type::STRING:
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it.value().GetAsString(&string_value);
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if (!IsValidType(string_value)) {
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*error = "Invalid value for type attribute";
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return false;
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}
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break;
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case base::Value::Type::LIST:
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it.value().GetAsList(&list_value);
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for (size_t i = 0; i < list_value->GetSize(); ++i) {
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if (!list_value->GetString(i, &string_value) ||
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!IsValidType(string_value)) {
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*error = "Invalid value for type attribute";
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return false;
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}
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}
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break;
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default:
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*error = "Invalid value for type attribute";
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return false;
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}
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has_type_or_ref = true;
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continue;
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}
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// Validate the "items" attribute, which is a schema or a list of schemas.
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if (it.key() == schema::kItems) {
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if (it.value().GetAsDictionary(&dictionary_value)) {
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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} else if (it.value().GetAsList(&list_value)) {
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for (size_t i = 0; i < list_value->GetSize(); ++i) {
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if (!list_value->GetDictionary(i, &dictionary_value)) {
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*error = base::StringPrintf(
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"Invalid entry in items attribute at index %d",
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static_cast<int>(i));
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return false;
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}
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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}
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} else {
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*error = "Invalid value for items attribute";
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return false;
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}
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continue;
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}
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// All the other attributes have a single valid type.
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const ExpectedType* end = kExpectedTypes + arraysize(kExpectedTypes);
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const ExpectedType* entry = std::lower_bound(
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kExpectedTypes, end, it.key(), CompareToString);
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if (entry == end || entry->key != it.key()) {
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if (options & JSONSchemaValidator::OPTIONS_IGNORE_UNKNOWN_ATTRIBUTES)
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continue;
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*error = base::StringPrintf("Invalid attribute %s", it.key().c_str());
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return false;
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}
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// Integer can be converted to double.
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if (!(it.value().type() == entry->type ||
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(it.value().is_int() && entry->type == base::Value::Type::DOUBLE))) {
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*error = base::StringPrintf("Invalid value for %s attribute",
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it.key().c_str());
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return false;
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}
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// base::Value::Type::INTEGER attributes must be >= 0.
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// This applies to "minItems", "maxItems", "minLength" and "maxLength".
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if (it.value().is_int()) {
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int integer_value;
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it.value().GetAsInteger(&integer_value);
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if (integer_value < 0) {
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*error = base::StringPrintf("Value of %s must be >= 0, got %d",
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it.key().c_str(), integer_value);
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return false;
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}
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}
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// Validate the "properties" attribute. Each entry maps a key to a schema.
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if (it.key() == schema::kProperties) {
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it.value().GetAsDictionary(&dictionary_value);
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for (base::DictionaryValue::Iterator iter(*dictionary_value);
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!iter.IsAtEnd(); iter.Advance()) {
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if (!iter.value().GetAsDictionary(&dictionary_value)) {
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*error = "properties must be a dictionary";
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return false;
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}
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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}
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}
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// Validate the "patternProperties" attribute. Each entry maps a regular
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// expression to a schema. The validity of the regular expression expression
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// won't be checked here for performance reasons. Instead, invalid regular
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// expressions will be caught as validation errors in Validate().
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if (it.key() == schema::kPatternProperties) {
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it.value().GetAsDictionary(&dictionary_value);
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for (base::DictionaryValue::Iterator iter(*dictionary_value);
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!iter.IsAtEnd(); iter.Advance()) {
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if (!iter.value().GetAsDictionary(&dictionary_value)) {
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*error = "patternProperties must be a dictionary";
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return false;
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}
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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}
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}
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// Validate "additionalProperties" attribute, which is a schema.
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if (it.key() == schema::kAdditionalProperties) {
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it.value().GetAsDictionary(&dictionary_value);
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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}
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// Validate "required" attribute.
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if (it.key() == schema::kRequired) {
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it.value().GetAsList(&list_value);
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for (const base::Value& value : *list_value) {
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if (value.type() != base::Value::Type::STRING) {
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*error = "Invalid value in 'required' attribute";
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return false;
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}
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// TODO(crbug.com/856903): Check that |value| is a key in
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// schema::kProperties
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}
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}
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// Validate the values contained in an "enum" attribute.
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if (it.key() == schema::kEnum) {
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it.value().GetAsList(&list_value);
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for (size_t i = 0; i < list_value->GetSize(); ++i) {
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const base::Value* value = nullptr;
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list_value->Get(i, &value);
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// Sometimes the enum declaration is a dictionary with the enum value
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// under "name".
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value = ExtractNameFromDictionary(value);
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if (!value) {
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*error = "Invalid value in enum attribute";
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return false;
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}
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switch (value->type()) {
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case base::Value::Type::NONE:
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case base::Value::Type::BOOLEAN:
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case base::Value::Type::INTEGER:
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case base::Value::Type::DOUBLE:
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case base::Value::Type::STRING:
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break;
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default:
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*error = "Invalid value in enum attribute";
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return false;
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}
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}
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}
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// Validate the schemas contained in a "choices" attribute.
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if (it.key() == schema::kChoices) {
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it.value().GetAsList(&list_value);
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for (size_t i = 0; i < list_value->GetSize(); ++i) {
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if (!list_value->GetDictionary(i, &dictionary_value)) {
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*error = "Invalid choices attribute";
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return false;
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}
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if (!IsValidSchema(dictionary_value, options, error)) {
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DCHECK(!error->empty());
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return false;
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}
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}
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}
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if (it.key() == schema::kRef)
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has_type_or_ref = true;
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}
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if (!has_type_or_ref) {
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*error = "Schema must have a type or a $ref attribute";
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return false;
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}
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return true;
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}
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} // namespace
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JSONSchemaValidator::Error::Error() {
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}
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JSONSchemaValidator::Error::Error(const std::string& message)
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: path(message) {
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}
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JSONSchemaValidator::Error::Error(const std::string& path,
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const std::string& message)
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: path(path), message(message) {
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}
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const char JSONSchemaValidator::kUnknownTypeReference[] =
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"Unknown schema reference: *.";
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const char JSONSchemaValidator::kInvalidChoice[] =
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"Value does not match any valid type choices.";
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const char JSONSchemaValidator::kInvalidEnum[] =
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"Value does not match any valid enum choices.";
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const char JSONSchemaValidator::kObjectPropertyIsRequired[] =
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"Property is required.";
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const char JSONSchemaValidator::kUnexpectedProperty[] =
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"Unexpected property.";
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const char JSONSchemaValidator::kArrayMinItems[] =
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"Array must have at least * items.";
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const char JSONSchemaValidator::kArrayMaxItems[] =
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"Array must not have more than * items.";
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const char JSONSchemaValidator::kArrayItemRequired[] =
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"Item is required.";
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const char JSONSchemaValidator::kStringMinLength[] =
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"String must be at least * characters long.";
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const char JSONSchemaValidator::kStringMaxLength[] =
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"String must not be more than * characters long.";
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const char JSONSchemaValidator::kStringPattern[] =
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"String must match the pattern: *.";
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const char JSONSchemaValidator::kNumberMinimum[] =
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"Value must not be less than *.";
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const char JSONSchemaValidator::kNumberMaximum[] =
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"Value must not be greater than *.";
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const char JSONSchemaValidator::kInvalidType[] =
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"Expected '*' but got '*'.";
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const char JSONSchemaValidator::kInvalidTypeIntegerNumber[] =
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"Expected 'integer' but got 'number', consider using Math.round().";
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const char JSONSchemaValidator::kInvalidRegex[] =
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"Regular expression /*/ is invalid: *";
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// static
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std::string JSONSchemaValidator::GetJSONSchemaType(const base::Value* value) {
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switch (value->type()) {
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case base::Value::Type::NONE:
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return schema::kNull;
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case base::Value::Type::BOOLEAN:
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return schema::kBoolean;
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case base::Value::Type::INTEGER:
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return schema::kInteger;
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case base::Value::Type::DOUBLE: {
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double double_value = 0;
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value->GetAsDouble(&double_value);
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if (std::abs(double_value) <= std::pow(2.0, DBL_MANT_DIG) &&
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double_value == floor(double_value)) {
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return schema::kInteger;
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}
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return schema::kNumber;
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}
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case base::Value::Type::STRING:
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return schema::kString;
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case base::Value::Type::DICTIONARY:
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return schema::kObject;
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case base::Value::Type::LIST:
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return schema::kArray;
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default:
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NOTREACHED() << "Unexpected value type: " << value->type();
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return std::string();
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}
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}
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// static
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std::string JSONSchemaValidator::FormatErrorMessage(const std::string& format,
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const std::string& s1) {
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std::string ret_val = format;
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base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s1);
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return ret_val;
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}
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// static
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std::string JSONSchemaValidator::FormatErrorMessage(const std::string& format,
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const std::string& s1,
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const std::string& s2) {
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std::string ret_val = format;
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base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s1);
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base::ReplaceFirstSubstringAfterOffset(&ret_val, 0, "*", s2);
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return ret_val;
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}
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// static
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std::unique_ptr<base::DictionaryValue> JSONSchemaValidator::IsValidSchema(
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const std::string& schema,
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std::string* error) {
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return JSONSchemaValidator::IsValidSchema(schema, 0, error);
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}
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// static
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std::unique_ptr<base::DictionaryValue> JSONSchemaValidator::IsValidSchema(
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const std::string& schema,
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int validator_options,
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std::string* error) {
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base::JSONParserOptions json_options = base::JSON_PARSE_RFC;
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std::unique_ptr<base::Value> json = base::JSONReader::ReadAndReturnError(
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schema, json_options, nullptr, error);
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if (!json)
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return std::unique_ptr<base::DictionaryValue>();
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base::DictionaryValue* dict = nullptr;
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if (!json->GetAsDictionary(&dict)) {
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*error = "Schema must be a JSON object";
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return std::unique_ptr<base::DictionaryValue>();
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}
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if (!::IsValidSchema(dict, validator_options, error))
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return std::unique_ptr<base::DictionaryValue>();
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ignore_result(json.release());
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return base::WrapUnique(dict);
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}
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JSONSchemaValidator::JSONSchemaValidator(base::DictionaryValue* schema)
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: schema_root_(schema), default_allow_additional_properties_(false) {
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}
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JSONSchemaValidator::JSONSchemaValidator(base::DictionaryValue* schema,
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base::ListValue* types)
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: schema_root_(schema), default_allow_additional_properties_(false) {
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if (!types)
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return;
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for (size_t i = 0; i < types->GetSize(); ++i) {
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base::DictionaryValue* type = nullptr;
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CHECK(types->GetDictionary(i, &type));
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std::string id;
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CHECK(type->GetString(schema::kId, &id));
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CHECK(types_.find(id) == types_.end());
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types_[id] = type;
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}
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}
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JSONSchemaValidator::~JSONSchemaValidator() {}
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bool JSONSchemaValidator::Validate(const base::Value* instance) {
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errors_.clear();
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Validate(instance, schema_root_, std::string());
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return errors_.empty();
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}
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void JSONSchemaValidator::Validate(const base::Value* instance,
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const base::DictionaryValue* schema,
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const std::string& path) {
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// If this schema defines itself as reference type, save it in this.types.
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std::string id;
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if (schema->GetString(schema::kId, &id)) {
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TypeMap::iterator iter = types_.find(id);
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if (iter == types_.end())
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types_[id] = schema;
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else
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DCHECK(iter->second == schema);
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}
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// If the schema has a $ref property, the instance must validate against
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// that schema. It must be present in types_ to be referenced.
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std::string ref;
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if (schema->GetString(schema::kRef, &ref)) {
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TypeMap::iterator type = types_.find(ref);
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if (type == types_.end()) {
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errors_.push_back(
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Error(path, FormatErrorMessage(kUnknownTypeReference, ref)));
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} else {
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Validate(instance, type->second, path);
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}
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return;
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}
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// If the schema has a choices property, the instance must validate against at
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// least one of the items in that array.
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const base::ListValue* choices = nullptr;
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if (schema->GetList(schema::kChoices, &choices)) {
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ValidateChoices(instance, choices, path);
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return;
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}
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// If the schema has an enum property, the instance must be one of those
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// values.
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const base::ListValue* enumeration = nullptr;
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if (schema->GetList(schema::kEnum, &enumeration)) {
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ValidateEnum(instance, enumeration, path);
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return;
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}
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std::string type;
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schema->GetString(schema::kType, &type);
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CHECK(!type.empty());
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if (type != schema::kAny) {
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if (!ValidateType(instance, type, path))
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return;
|
|
|
|
// These casts are safe because of checks in ValidateType().
|
|
if (type == schema::kObject) {
|
|
ValidateObject(static_cast<const base::DictionaryValue*>(instance),
|
|
schema,
|
|
path);
|
|
} else if (type == schema::kArray) {
|
|
ValidateArray(static_cast<const base::ListValue*>(instance),
|
|
schema, path);
|
|
} else if (type == schema::kString) {
|
|
// Intentionally NOT downcasting to StringValue*. Type::STRING only
|
|
// implies GetAsString() can safely be carried out, not that it's a
|
|
// StringValue.
|
|
ValidateString(instance, schema, path);
|
|
} else if (type == schema::kNumber || type == schema::kInteger) {
|
|
ValidateNumber(instance, schema, path);
|
|
} else if (type != schema::kBoolean && type != schema::kNull) {
|
|
NOTREACHED() << "Unexpected type: " << type;
|
|
}
|
|
}
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateChoices(const base::Value* instance,
|
|
const base::ListValue* choices,
|
|
const std::string& path) {
|
|
size_t original_num_errors = errors_.size();
|
|
|
|
for (size_t i = 0; i < choices->GetSize(); ++i) {
|
|
const base::DictionaryValue* choice = nullptr;
|
|
CHECK(choices->GetDictionary(i, &choice));
|
|
|
|
Validate(instance, choice, path);
|
|
if (errors_.size() == original_num_errors)
|
|
return;
|
|
|
|
// We discard the error from each choice. We only want to know if any of the
|
|
// validations succeeded.
|
|
errors_.resize(original_num_errors);
|
|
}
|
|
|
|
// Now add a generic error that no choices matched.
|
|
errors_.push_back(Error(path, kInvalidChoice));
|
|
return;
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateEnum(const base::Value* instance,
|
|
const base::ListValue* choices,
|
|
const std::string& path) {
|
|
for (size_t i = 0; i < choices->GetSize(); ++i) {
|
|
const base::Value* choice = nullptr;
|
|
CHECK(choices->Get(i, &choice));
|
|
// Sometimes the enum declaration is a dictionary with the enum value under
|
|
// "name".
|
|
choice = ExtractNameFromDictionary(choice);
|
|
if (!choice) {
|
|
NOTREACHED();
|
|
}
|
|
switch (choice->type()) {
|
|
case base::Value::Type::NONE:
|
|
case base::Value::Type::BOOLEAN:
|
|
case base::Value::Type::STRING:
|
|
if (instance->Equals(choice))
|
|
return;
|
|
break;
|
|
|
|
case base::Value::Type::INTEGER:
|
|
case base::Value::Type::DOUBLE:
|
|
if (instance->is_int() || instance->is_double()) {
|
|
if (GetNumberValue(choice) == GetNumberValue(instance))
|
|
return;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
NOTREACHED() << "Unexpected type in enum: " << choice->type();
|
|
}
|
|
}
|
|
|
|
errors_.push_back(Error(path, kInvalidEnum));
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateObject(const base::DictionaryValue* instance,
|
|
const base::DictionaryValue* schema,
|
|
const std::string& path) {
|
|
const base::DictionaryValue* properties = nullptr;
|
|
if (schema->GetDictionary(schema::kProperties, &properties)) {
|
|
for (base::DictionaryValue::Iterator it(*properties); !it.IsAtEnd();
|
|
it.Advance()) {
|
|
std::string prop_path = path.empty() ? it.key() : (path + "." + it.key());
|
|
const base::DictionaryValue* prop_schema = nullptr;
|
|
CHECK(it.value().GetAsDictionary(&prop_schema));
|
|
|
|
const base::Value* prop_value = nullptr;
|
|
if (instance->Get(it.key(), &prop_value)) {
|
|
Validate(prop_value, prop_schema, prop_path);
|
|
} else {
|
|
// Properties are required unless there is an optional field set to
|
|
// 'true'.
|
|
bool is_optional = false;
|
|
prop_schema->GetBoolean(schema::kOptional, &is_optional);
|
|
if (!is_optional) {
|
|
errors_.push_back(Error(prop_path, kObjectPropertyIsRequired));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
const base::DictionaryValue* additional_properties_schema = nullptr;
|
|
bool allow_any_additional_properties =
|
|
SchemaAllowsAnyAdditionalItems(schema, &additional_properties_schema);
|
|
|
|
const base::DictionaryValue* pattern_properties = nullptr;
|
|
std::vector<std::unique_ptr<re2::RE2>> pattern_properties_pattern;
|
|
std::vector<const base::DictionaryValue*> pattern_properties_schema;
|
|
|
|
if (schema->GetDictionary(schema::kPatternProperties, &pattern_properties)) {
|
|
for (base::DictionaryValue::Iterator it(*pattern_properties); !it.IsAtEnd();
|
|
it.Advance()) {
|
|
auto prop_pattern = std::make_unique<re2::RE2>(it.key());
|
|
if (!prop_pattern->ok()) {
|
|
LOG(WARNING) << "Regular expression /" << it.key()
|
|
<< "/ is invalid: " << prop_pattern->error() << ".";
|
|
errors_.push_back(
|
|
Error(path,
|
|
FormatErrorMessage(
|
|
kInvalidRegex, it.key(), prop_pattern->error())));
|
|
continue;
|
|
}
|
|
const base::DictionaryValue* prop_schema = nullptr;
|
|
CHECK(it.value().GetAsDictionary(&prop_schema));
|
|
pattern_properties_pattern.push_back(std::move(prop_pattern));
|
|
pattern_properties_schema.push_back(prop_schema);
|
|
}
|
|
}
|
|
|
|
// Validate pattern properties and additional properties.
|
|
for (base::DictionaryValue::Iterator it(*instance); !it.IsAtEnd();
|
|
it.Advance()) {
|
|
std::string prop_path = path.empty() ? it.key() : path + "." + it.key();
|
|
|
|
bool found_matching_pattern = false;
|
|
for (size_t index = 0; index < pattern_properties_pattern.size(); ++index) {
|
|
if (re2::RE2::PartialMatch(it.key(),
|
|
*pattern_properties_pattern[index])) {
|
|
found_matching_pattern = true;
|
|
Validate(&it.value(), pattern_properties_schema[index], prop_path);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found_matching_pattern || allow_any_additional_properties ||
|
|
(properties && properties->HasKey(it.key())))
|
|
continue;
|
|
|
|
if (!additional_properties_schema) {
|
|
errors_.push_back(Error(prop_path, kUnexpectedProperty));
|
|
} else {
|
|
Validate(&it.value(), additional_properties_schema, prop_path);
|
|
}
|
|
}
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateArray(const base::ListValue* instance,
|
|
const base::DictionaryValue* schema,
|
|
const std::string& path) {
|
|
const base::DictionaryValue* single_type = nullptr;
|
|
size_t instance_size = instance->GetSize();
|
|
if (schema->GetDictionary(schema::kItems, &single_type)) {
|
|
int min_items = 0;
|
|
if (schema->GetInteger(schema::kMinItems, &min_items)) {
|
|
CHECK(min_items >= 0);
|
|
if (instance_size < static_cast<size_t>(min_items)) {
|
|
errors_.push_back(Error(path, FormatErrorMessage(
|
|
kArrayMinItems, base::IntToString(min_items))));
|
|
}
|
|
}
|
|
|
|
int max_items = 0;
|
|
if (schema->GetInteger(schema::kMaxItems, &max_items)) {
|
|
CHECK(max_items >= 0);
|
|
if (instance_size > static_cast<size_t>(max_items)) {
|
|
errors_.push_back(Error(path, FormatErrorMessage(
|
|
kArrayMaxItems, base::IntToString(max_items))));
|
|
}
|
|
}
|
|
|
|
// If the items property is a single schema, each item in the array must
|
|
// validate against that schema.
|
|
for (size_t i = 0; i < instance_size; ++i) {
|
|
const base::Value* item = nullptr;
|
|
CHECK(instance->Get(i, &item));
|
|
std::string i_str = base::NumberToString(i);
|
|
std::string item_path = path.empty() ? i_str : (path + "." + i_str);
|
|
Validate(item, single_type, item_path);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// Otherwise, the list must be a tuple type, where each item in the list has a
|
|
// particular schema.
|
|
ValidateTuple(instance, schema, path);
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateTuple(const base::ListValue* instance,
|
|
const base::DictionaryValue* schema,
|
|
const std::string& path) {
|
|
const base::ListValue* tuple_type = nullptr;
|
|
schema->GetList(schema::kItems, &tuple_type);
|
|
size_t tuple_size = tuple_type ? tuple_type->GetSize() : 0;
|
|
if (tuple_type) {
|
|
for (size_t i = 0; i < tuple_size; ++i) {
|
|
std::string i_str = base::NumberToString(i);
|
|
std::string item_path = path.empty() ? i_str : (path + "." + i_str);
|
|
const base::DictionaryValue* item_schema = nullptr;
|
|
CHECK(tuple_type->GetDictionary(i, &item_schema));
|
|
const base::Value* item_value = nullptr;
|
|
instance->Get(i, &item_value);
|
|
if (item_value && item_value->type() != base::Value::Type::NONE) {
|
|
Validate(item_value, item_schema, item_path);
|
|
} else {
|
|
bool is_optional = false;
|
|
item_schema->GetBoolean(schema::kOptional, &is_optional);
|
|
if (!is_optional) {
|
|
errors_.push_back(Error(item_path, kArrayItemRequired));
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
const base::DictionaryValue* additional_properties_schema = nullptr;
|
|
if (SchemaAllowsAnyAdditionalItems(schema, &additional_properties_schema))
|
|
return;
|
|
|
|
size_t instance_size = instance->GetSize();
|
|
if (additional_properties_schema) {
|
|
// Any additional properties must validate against the additionalProperties
|
|
// schema.
|
|
for (size_t i = tuple_size; i < instance_size; ++i) {
|
|
std::string i_str = base::NumberToString(i);
|
|
std::string item_path = path.empty() ? i_str : (path + "." + i_str);
|
|
const base::Value* item_value = nullptr;
|
|
CHECK(instance->Get(i, &item_value));
|
|
Validate(item_value, additional_properties_schema, item_path);
|
|
}
|
|
} else if (instance_size > tuple_size) {
|
|
errors_.push_back(Error(
|
|
path,
|
|
FormatErrorMessage(kArrayMaxItems, base::NumberToString(tuple_size))));
|
|
}
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateString(const base::Value* instance,
|
|
const base::DictionaryValue* schema,
|
|
const std::string& path) {
|
|
std::string value;
|
|
CHECK(instance->GetAsString(&value));
|
|
|
|
int min_length = 0;
|
|
if (schema->GetInteger(schema::kMinLength, &min_length)) {
|
|
CHECK(min_length >= 0);
|
|
if (value.size() < static_cast<size_t>(min_length)) {
|
|
errors_.push_back(Error(path, FormatErrorMessage(
|
|
kStringMinLength, base::IntToString(min_length))));
|
|
}
|
|
}
|
|
|
|
int max_length = 0;
|
|
if (schema->GetInteger(schema::kMaxLength, &max_length)) {
|
|
CHECK(max_length >= 0);
|
|
if (value.size() > static_cast<size_t>(max_length)) {
|
|
errors_.push_back(Error(path, FormatErrorMessage(
|
|
kStringMaxLength, base::IntToString(max_length))));
|
|
}
|
|
}
|
|
|
|
std::string pattern;
|
|
if (schema->GetString(schema::kPattern, &pattern)) {
|
|
re2::RE2 compiled_regex(pattern);
|
|
if (!compiled_regex.ok()) {
|
|
LOG(WARNING) << "Regular expression /" << pattern
|
|
<< "/ is invalid: " << compiled_regex.error() << ".";
|
|
errors_.push_back(Error(
|
|
path,
|
|
FormatErrorMessage(kInvalidRegex, pattern, compiled_regex.error())));
|
|
} else if (!re2::RE2::PartialMatch(value, compiled_regex)) {
|
|
errors_.push_back(
|
|
Error(path, FormatErrorMessage(kStringPattern, pattern)));
|
|
}
|
|
}
|
|
}
|
|
|
|
void JSONSchemaValidator::ValidateNumber(const base::Value* instance,
|
|
const base::DictionaryValue* schema,
|
|
const std::string& path) {
|
|
double value = GetNumberValue(instance);
|
|
|
|
// TODO(aa): It would be good to test that the double is not infinity or nan,
|
|
// but isnan and isinf aren't defined on Windows.
|
|
|
|
double minimum = 0;
|
|
if (schema->GetDouble(schema::kMinimum, &minimum)) {
|
|
if (value < minimum)
|
|
errors_.push_back(Error(
|
|
path,
|
|
FormatErrorMessage(kNumberMinimum, base::NumberToString(minimum))));
|
|
}
|
|
|
|
double maximum = 0;
|
|
if (schema->GetDouble(schema::kMaximum, &maximum)) {
|
|
if (value > maximum)
|
|
errors_.push_back(Error(
|
|
path,
|
|
FormatErrorMessage(kNumberMaximum, base::NumberToString(maximum))));
|
|
}
|
|
}
|
|
|
|
bool JSONSchemaValidator::ValidateType(const base::Value* instance,
|
|
const std::string& expected_type,
|
|
const std::string& path) {
|
|
std::string actual_type = GetJSONSchemaType(instance);
|
|
if (expected_type == actual_type ||
|
|
(expected_type == schema::kNumber && actual_type == schema::kInteger)) {
|
|
return true;
|
|
}
|
|
if (expected_type == schema::kInteger && actual_type == schema::kNumber) {
|
|
errors_.push_back(Error(path, kInvalidTypeIntegerNumber));
|
|
return false;
|
|
}
|
|
errors_.push_back(Error(
|
|
path, FormatErrorMessage(kInvalidType, expected_type, actual_type)));
|
|
return false;
|
|
}
|
|
|
|
bool JSONSchemaValidator::SchemaAllowsAnyAdditionalItems(
|
|
const base::DictionaryValue* schema,
|
|
const base::DictionaryValue** additional_properties_schema) {
|
|
// If the validator allows additional properties globally, and this schema
|
|
// doesn't override, then we can exit early.
|
|
schema->GetDictionary(schema::kAdditionalProperties,
|
|
additional_properties_schema);
|
|
|
|
if (*additional_properties_schema) {
|
|
std::string additional_properties_type(schema::kAny);
|
|
CHECK((*additional_properties_schema)->GetString(
|
|
schema::kType, &additional_properties_type));
|
|
return additional_properties_type == schema::kAny;
|
|
}
|
|
return default_allow_additional_properties_;
|
|
}
|