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/**
* Python plugin for Orthanc
* Copyright (C) 2020-2021 Osimis S.A., Belgium
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
#include "IncomingHttpRequestFilter.h"
#include "PythonString.h"
#include "Autogenerated/sdk.h"
#include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
static PyObject* incomingHttpRequestFilter_ = NULL;
static int32_t IncomingHttpRequestFilter(OrthancPluginHttpMethod method,
const char *uri,
const char *ip,
uint32_t headersCount,
const char *const *headersKeys,
const char *const *headersValues,
uint32_t getArgumentsCount,
const char *const *getArgumentsKeys,
const char *const *getArgumentsValues)
{
try
{
PythonLock lock;
PythonObject args(lock, PyTuple_New(1));
{
PythonString str(lock, uri);
PyTuple_SetItem(args.GetPyObject(), 0, str.Release());
}
PythonObject kw(lock, PyDict_New());
PyDict_SetItemString(kw.GetPyObject(), "method", PyLong_FromLong(method));
{
PythonString str(lock, ip);
PyDict_SetItemString(kw.GetPyObject(), "ip", str.Release());
}
{
PythonObject headers(lock, PyDict_New());
for (uint32_t i = 0; i < headersCount; i++)
{
PythonString str(lock, headersValues[i]);
PyDict_SetItemString(headers.GetPyObject(), headersKeys[i], str.Release());
}
PyDict_SetItemString(kw.GetPyObject(), "headers", headers.Release());
}
if (method == OrthancPluginHttpMethod_Get)
{
PythonObject getArguments(lock, PyDict_New());
for (uint32_t i = 0; i < getArgumentsCount; i++)
{
PythonString str(lock, getArgumentsValues[i]);
PyDict_SetItemString(getArguments.GetPyObject(), getArgumentsKeys[i], str.Release());
}
PyDict_SetItemString(kw.GetPyObject(), "get", getArguments.Release());
}
PythonObject result(lock, PyObject_Call(incomingHttpRequestFilter_,
args.GetPyObject(), kw.GetPyObject()));
std::string traceback;
if (lock.HasErrorOccurred(traceback))
{
OrthancPlugins::LogError("Error in the Python incoming-http-request filter, "
"traceback:\n" + traceback);
return -1;
}
else
{
if (PyBool_Check(result.GetPyObject()))
{
return (PyObject_IsTrue(result.GetPyObject()) ? 1 /* allowed */ : 0 /* forbidden */);
}
else
{
OrthancPlugins::LogError("The Python incoming-http-request filter has not returned a Boolean");
return -1;
}
}
}
catch (OrthancPlugins::PluginException& e)
{
OrthancPlugins::LogError("Exception in the Python incoming-http-request filter: " +
std::string(e.What(OrthancPlugins::GetGlobalContext())));
return e.GetErrorCode();
}
}
PyObject* RegisterIncomingHttpRequestFilter(PyObject* module, PyObject* args)
{
// The GIL is locked at this point (no need to create "PythonLock")
// https://docs.python.org/3/extending/extending.html#calling-python-functions-from-c
PyObject* callback = NULL;
if (!PyArg_ParseTuple(args, "O", &callback) ||
callback == NULL)
{
PyErr_SetString(PyExc_ValueError, "Expected a callback function");
return NULL;
}
if (incomingHttpRequestFilter_ != NULL)
{
PyErr_SetString(PyExc_RuntimeError, "Can only register one Python incoming-http-request filter");
return NULL;
}
OrthancPlugins::LogInfo("Registering a Python incoming-http-request filter");
OrthancPluginRegisterIncomingHttpRequestFilter2(
OrthancPlugins::GetGlobalContext(), IncomingHttpRequestFilter);
incomingHttpRequestFilter_ = callback;
Py_XINCREF(incomingHttpRequestFilter_);
Py_INCREF(Py_None);
return Py_None;
}
void FinalizeIncomingHttpRequestFilter()
{
PythonLock lock;
if (incomingHttpRequestFilter_ != NULL)
{
Py_XDECREF(incomingHttpRequestFilter_);
}
}
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