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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/safe_json/json_sanitizer.h"
#if defined(OS_ANDROID)
#error Build json_sanitizer_android.cc instead of this file on Android.
#endif
#include "base/bind.h"
#include "base/callback.h"
#include "base/json/json_writer.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "components/safe_json/safe_json_parser.h"
namespace safe_json {
namespace {
class OopJsonSanitizer : public JsonSanitizer {
public:
OopJsonSanitizer(const std::string& unsafe_json,
const StringCallback& success_callback,
const StringCallback& error_callback);
private:
friend struct base::DefaultDeleter<OopJsonSanitizer>;
~OopJsonSanitizer() {}
void OnParseSuccess(scoped_ptr<base::Value> value);
void OnParseError(const std::string& error);
StringCallback success_callback_;
StringCallback error_callback_;
DISALLOW_COPY_AND_ASSIGN(OopJsonSanitizer);
};
OopJsonSanitizer::OopJsonSanitizer(const std::string& unsafe_json,
const StringCallback& success_callback,
const StringCallback& error_callback)
: success_callback_(success_callback), error_callback_(error_callback) {
SafeJsonParser::Parse(unsafe_json,
base::Bind(&OopJsonSanitizer::OnParseSuccess,
base::Unretained(this)),
base::Bind(&OopJsonSanitizer::OnParseError,
base::Unretained(this)));
}
void OopJsonSanitizer::OnParseSuccess(scoped_ptr<base::Value> value) {
// Self-destruct at the end of this method.
scoped_ptr<OopJsonSanitizer> deleter(this);
// A valid JSON document may only have a dictionary or list as its top-level
// type, but the JSON parser also accepts other types, so we filter them out.
base::Value::Type type = value->GetType();
if (type != base::Value::TYPE_DICTIONARY && type != base::Value::TYPE_LIST) {
error_callback_.Run("Invalid top-level type");
return;
}
std::string json;
if (!base::JSONWriter::Write(*value, &json)) {
error_callback_.Run("Encoding error");
return;
}
success_callback_.Run(json);
}
void OopJsonSanitizer::OnParseError(const std::string& error) {
error_callback_.Run("Parse error: " + error);
delete this;
}
} // namespace
// static
void JsonSanitizer::Sanitize(const std::string& unsafe_json,
const StringCallback& success_callback,
const StringCallback& error_callback) {
// OopJsonSanitizer destroys itself when it is finished.
new OopJsonSanitizer(unsafe_json, success_callback, error_callback);
}
} // namespace safe_json
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