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revived.h
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revived.h
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/**
* Revived.h
*
* Input that parses a data buffer, and that extracts the original used
* supplied PHP variable with the algorithm from it, and the input data.
*
* @author Emiel Bruijntjes <[email protected]>
* @copyright 2015 - 2016 Copernica BV
*/
/**
* Dependencies
*/
#include "cache.h"
/**
* Include guard
*/
#pragma once
/**
* Class definition
*/
class Revived
{
private:
/**
* All the data
* @var std::string
*/
std::string _data;
/**
* The unserialized PHP value
* @var Php::Value
*/
Php::Value _object;
/**
* The rest of the input data
* @var const char *
*/
const char *_rest;
/**
* Cache settings
* @var Cache
*/
Cache _cache;
/**
* The yothalot target object
* @var Yothalot::Target
*/
Yothalot::Target _target;
/**
* Initialize the object
* @return Php::Value unserialized input data
* @throws std::runtime_error
*/
bool initialize()
{
// look for the \n\n separator
auto separator = _data.find("\n\n");
// should exist
if (separator == std::string::npos) throw std::runtime_error("missing separator between serialized data and input data");
// we now know where the rest of the data starts
_rest = _data.data() + separator + 2;
// unserialize the first part of the stdin
Php::Value unserialized(Php::call("unserialize", Php::call("base64_decode", Php::Value(_data.data(), separator))));
// must be an array
if (!unserialized.isArray()) throw std::runtime_error("failed to unserialize input data");
// store the includes and the actual object
Php::Value includes = unserialized[0];
Php::Value object = unserialized[1];
// the return value of the includes method could be a single string
if (includes.isString())
{
// include the PHP file (this could cause a PHP fatal error)
if (!Php::include_once(includes.stringValue())) Php::error << "Failed to include " << includes.stringValue() << std::flush;
}
else if (includes.isArray())
{
// loop over all our includes and call require_once with all of them
for (int i = 0; i < includes.size(); ++i)
{
// the file to include
Php::Value path = includes[i];
// include the PHP file (this could cause a PHP fatal error)
if (!Php::include_once(path.stringValue())) Php::error << "Failed to include " << path << std::flush;
}
}
// unserialize the inner object
_object = Php::call("unserialize", object);
// must be an object
if (!_object.isObject()) throw std::runtime_error("failued to unserialize object");
// done, expose the unserialized data
return unserialized;
}
public:
/**
* Constructor that takes an existing buffer
* @param buffer
*/
Revived(const char *buffer) :
_data(buffer),
_cache(initialize(), 2),
_target(_cache.connection(), _cache.maxsize(), _cache.ttl()) {}
/**
* Constructor that takes an existing buffer
* @param buffer
* @param size
*/
Revived(const char *buffer, size_t size) :
_data(buffer, size),
_cache(initialize(), 2),
_target(_cache.connection(), _cache.maxsize(), _cache.ttl()) {}
/**
* Constructor that takes an existing buffer
* @param buffer
*/
Revived(std::string buffer) :
_data(std::move(buffer)),
_cache(initialize(), 2),
_target(_cache.connection(), _cache.maxsize(), _cache.ttl()) {}
/**
* Destructor
*/
virtual ~Revived() = default;
/**
* The user-supplied PHP object
* @return Php::Value
*/
const Php::Value &object() const
{
return _object;
}
/**
* The input data
* @return const char *
*/
const char *data() const
{
return _rest;
}
/**
* Size of the data
* @return size_t
*/
size_t size() const
{
return _data.size() - (_rest - _data.data());
}
/**
* Expose target object
* @return Yothalot::Target
*/
Yothalot::Target *target()
{
return &_target;
}
};