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/*
* Copyright (C) 2015-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "HTTPPythonHandler.h"
#include "ServiceBroker.h"
#include "URL.h"
#include "addons/Webinterface.h"
#include "addons/addoninfo/AddonType.h"
#include "filesystem/File.h"
#include "interfaces/generic/ScriptInvocationManager.h"
#include "interfaces/python/XBPython.h"
#include "network/WebServer.h"
#include "network/httprequesthandler/HTTPRequestHandlerUtils.h"
#include "network/httprequesthandler/HTTPWebinterfaceHandler.h"
#include "network/httprequesthandler/python/HTTPPythonInvoker.h"
#include "network/httprequesthandler/python/HTTPPythonWsgiInvoker.h"
#include "utils/StringUtils.h"
#include "utils/URIUtils.h"
#include "utils/log.h"
#define MAX_STRING_POST_SIZE 20000
CHTTPPythonHandler::CHTTPPythonHandler()
: IHTTPRequestHandler(),
m_scriptPath(),
m_addon(),
m_lastModified(),
m_requestData(),
m_responseData(),
m_responseRanges(),
m_redirectUrl()
{ }
CHTTPPythonHandler::CHTTPPythonHandler(const HTTPRequest &request)
: IHTTPRequestHandler(request),
m_scriptPath(),
m_addon(),
m_lastModified(),
m_requestData(),
m_responseData(),
m_responseRanges(),
m_redirectUrl()
{
m_response.type = HTTPMemoryDownloadNoFreeCopy;
// get the real path of the script and check if it actually exists
m_response.status = CHTTPWebinterfaceHandler::ResolveUrl(m_request.pathUrl, m_scriptPath, m_addon);
// only allow requests to a non-static webinterface addon
if (m_addon == NULL || m_addon->Type() != ADDON::AddonType::WEB_INTERFACE ||
std::dynamic_pointer_cast<ADDON::CWebinterface>(m_addon)->GetType() ==
ADDON::WebinterfaceTypeStatic)
{
m_response.type = HTTPError;
m_response.status = MHD_HTTP_INTERNAL_SERVER_ERROR;
return;
}
std::shared_ptr<ADDON::CWebinterface> webinterface = std::dynamic_pointer_cast<ADDON::CWebinterface>(m_addon);
// forward every request to the default entry point
m_scriptPath = webinterface->LibPath();
// we need to map any requests to a specific WSGI webinterface to the root path
std::string baseLocation = webinterface->GetBaseLocation();
if (!URIUtils::PathHasParent(m_request.pathUrl, baseLocation))
{
m_response.type = HTTPRedirect;
m_response.status = MHD_HTTP_MOVED_PERMANENTLY;
m_redirectUrl = baseLocation + m_request.pathUrl;
}
// no need to try to read the last modified date from a non-existing file
if (m_response.status != MHD_HTTP_OK)
return;
// determine the last modified date
const CURL pathToUrl(m_scriptPath);
struct __stat64 statBuffer;
if (XFILE::CFile::Stat(pathToUrl, &statBuffer) != 0)
return;
struct tm* time;
#ifdef HAVE_LOCALTIME_R
struct tm result = {};
time = localtime_r((time_t*)&statBuffer.st_mtime, &result);
#else
time = localtime((time_t *)&statBuffer.st_mtime);
#endif
if (time == NULL)
return;
m_lastModified = *time;
}
bool CHTTPPythonHandler::CanHandleRequest(const HTTPRequest &request) const
{
ADDON::AddonPtr addon;
std::string path;
// try to resolve the addon as any python script must be part of a webinterface
if (!CHTTPWebinterfaceHandler::ResolveAddon(request.pathUrl, addon, path) || addon == NULL ||
addon->Type() != ADDON::AddonType::WEB_INTERFACE)
return false;
// static webinterfaces aren't allowed to run python scripts
ADDON::CWebinterface* webinterface = static_cast<ADDON::CWebinterface*>(addon.get());
if (webinterface->GetType() != ADDON::WebinterfaceTypeWsgi)
return false;
return true;
}
MHD_RESULT CHTTPPythonHandler::HandleRequest()
{
if (m_response.type == HTTPError || m_response.type == HTTPRedirect)
return MHD_YES;
std::vector<std::string> args;
args.push_back(m_scriptPath);
try
{
HTTPPythonRequest* pythonRequest = new HTTPPythonRequest();
pythonRequest->connection = m_request.connection;
pythonRequest->file = URIUtils::GetFileName(m_request.pathUrl);
HTTPRequestHandlerUtils::GetRequestHeaderValues(m_request.connection, MHD_GET_ARGUMENT_KIND, pythonRequest->getValues);
HTTPRequestHandlerUtils::GetRequestHeaderValues(m_request.connection, MHD_HEADER_KIND, pythonRequest->headerValues);
pythonRequest->method = m_request.method;
pythonRequest->postValues = m_postFields;
pythonRequest->requestContent = m_requestData;
pythonRequest->responseType = HTTPNone;
pythonRequest->responseLength = 0;
pythonRequest->responseStatus = MHD_HTTP_OK;
pythonRequest->url = m_request.pathUrlFull;
pythonRequest->path = m_request.pathUrl;
pythonRequest->version = m_request.version;
pythonRequest->requestTime = CDateTime::GetCurrentDateTime();
pythonRequest->lastModifiedTime = m_lastModified;
std::string hostname;
uint16_t port;
if (GetHostnameAndPort(hostname, port))
{
pythonRequest->hostname = hostname;
pythonRequest->port = port;
}
CHTTPPythonInvoker* pythonInvoker =
new CHTTPPythonWsgiInvoker(&CServiceBroker::GetXBPython(), pythonRequest);
LanguageInvokerPtr languageInvokerPtr(pythonInvoker);
int result = CScriptInvocationManager::GetInstance().ExecuteSync(m_scriptPath, languageInvokerPtr, m_addon, args, 30000, false);
// check if the script couldn't be started
if (result < 0)
{
m_response.status = MHD_HTTP_INTERNAL_SERVER_ERROR;
m_response.type = HTTPError;
return MHD_YES;
}
// check if the script exited with an error
if (result > 0)
{
// check if the script didn't finish in time
if (result == ETIMEDOUT)
m_response.status = MHD_HTTP_REQUEST_TIMEOUT;
else
m_response.status = MHD_HTTP_INTERNAL_SERVER_ERROR;
m_response.type = HTTPError;
return MHD_YES;
}
HTTPPythonRequest* pythonFinalizedRequest = pythonInvoker->GetRequest();
if (pythonFinalizedRequest == NULL)
{
m_response.type = HTTPError;
m_response.status = MHD_HTTP_INTERNAL_SERVER_ERROR;
return MHD_YES;
}
m_response.type = pythonFinalizedRequest->responseType;
m_response.status = pythonFinalizedRequest->responseStatus;
if (m_response.status < MHD_HTTP_BAD_REQUEST)
{
if (m_response.type == HTTPNone)
m_response.type = HTTPMemoryDownloadNoFreeCopy;
m_response.headers = pythonFinalizedRequest->responseHeaders;
if (pythonFinalizedRequest->lastModifiedTime.IsValid())
m_lastModified = pythonFinalizedRequest->lastModifiedTime;
}
else
{
if (m_response.type == HTTPNone)
m_response.type = HTTPError;
m_response.headers = pythonFinalizedRequest->responseHeadersError;
}
m_responseData = pythonFinalizedRequest->responseData;
if (pythonFinalizedRequest->responseLength > 0 && pythonFinalizedRequest->responseLength <= m_responseData.size())
m_response.totalLength = pythonFinalizedRequest->responseLength;
else
m_response.totalLength = m_responseData.size();
CHttpResponseRange responseRange(m_responseData.c_str(), m_responseData.size());
m_responseRanges.push_back(responseRange);
if (!pythonFinalizedRequest->responseContentType.empty())
m_response.contentType = pythonFinalizedRequest->responseContentType;
}
catch (...)
{
m_response.type = HTTPError;
m_response.status = MHD_HTTP_INTERNAL_SERVER_ERROR;
}
return MHD_YES;
}
bool CHTTPPythonHandler::GetLastModifiedDate(CDateTime &lastModified) const
{
if (!m_lastModified.IsValid())
return false;
lastModified = m_lastModified;
return true;
}
bool CHTTPPythonHandler::appendPostData(const char *data, size_t size)
{
if (m_requestData.size() + size > MAX_STRING_POST_SIZE)
{
CServiceBroker::GetLogging()
.GetLogger("CHTTPPythonHandler")
->error("Stopped uploading post since it exceeded size limitations ({})",
MAX_STRING_POST_SIZE);
return false;
}
m_requestData.append(data, size);
return true;
}
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