Mercurial > hg > orthanc-python
view Sources/Plugin.cpp @ 95:c17cdaf687e3
use debian:buster-slim to compile Windows binaries
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 15 Sep 2021 11:52:30 +0200 |
parents | 068551520123 |
children | 627b8a19fb9f |
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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/>. **/ // http://edcjones.tripod.com/refcount.html // https://docs.python.org/3/extending/extending.html // https://www.codevate.com/blog/7-concurrency-with-embedded-python-in-a-multi-threaded-c-application // https://fr.slideshare.net/YiLungTsai/embed-python #include "DicomScpCallbacks.h" #include "IncomingHttpRequestFilter.h" #include "OnChangeCallback.h" #include "OnStoredInstanceCallback.h" #include "StorageArea.h" #include "RestCallbacks.h" #include "PythonModule.h" #include "Autogenerated/sdk.h" #include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h" #include <boost/algorithm/string/predicate.hpp> #include <boost/filesystem.hpp> // The "dl_iterate_phdr()" function (to walk through shared libraries) // is not available on Microsoft Windows and Apple OS X #if defined(_WIN32) # define HAS_DL_ITERATE 0 #elif defined(__APPLE__) && defined(__MACH__) # define HAS_DL_ITERATE 0 #else # define HAS_DL_ITERATE 1 #endif #include "PythonString.h" PyObject* LookupDictionary(PyObject* module, PyObject* args) { const char* name = NULL; if (!PyArg_ParseTuple(args, "s", &name)) { PyErr_SetString(PyExc_TypeError, "Please provide a string containing the name of the DICOM tag of interest"); return NULL; } else { OrthancPluginDictionaryEntry entry; OrthancPluginErrorCode code = OrthancPluginLookupDictionary(OrthancPlugins::GetGlobalContext(), &entry, name); if (code == OrthancPluginErrorCode_Success) { /** * "PyGILState_Ensure()" can be invoked several times from the * same thread, so no problem in creating a PythonLock even if * the GIL is already locked. **/ PythonLock lock; PythonObject kw(lock, PyDict_New()); PyDict_SetItemString(kw.GetPyObject(), "Group", PyLong_FromUnsignedLong(entry.group)); PyDict_SetItemString(kw.GetPyObject(), "Element", PyLong_FromUnsignedLong(entry.element)); PyDict_SetItemString(kw.GetPyObject(), "ValueRepresentation", PyLong_FromUnsignedLong(entry.vr)); PyDict_SetItemString(kw.GetPyObject(), "MinMultiplicity", PyLong_FromUnsignedLong(entry.minMultiplicity)); PyDict_SetItemString(kw.GetPyObject(), "MaxMultiplicity", PyLong_FromUnsignedLong(entry.maxMultiplicity)); return kw.Release(); } else { std::string message = "Unknown DICOM tag: " + std::string(name); PyErr_SetString(PyExc_TypeError, message.c_str()); return NULL; } } } PyObject* CreateDicom(PyObject* module, PyObject* args) { // The GIL is locked at this point (no need to create "PythonLock") const char* json = NULL; PyObject* pixelData = NULL; long int flags = 0; if (!PyArg_ParseTuple(args, "sOl", &json, &pixelData, &flags)) { PyErr_SetString(PyExc_TypeError, "Please provide a JSON string, an orthanc.Image object, and a set of orthanc.CreateDicomFlags"); return NULL; } else { OrthancPluginImage* image = NULL; if (pixelData == Py_None) { // No pixel data } else if (Py_TYPE(pixelData) == GetOrthancPluginImageType()) { image = reinterpret_cast<sdk_OrthancPluginImage_Object*>(pixelData)->object_; } else { PyErr_SetString(PyExc_TypeError, "Second parameter is not a valid orthanc.Image object"); return NULL; } OrthancPlugins::MemoryBuffer buffer; OrthancPluginErrorCode code = OrthancPluginCreateDicom(OrthancPlugins::GetGlobalContext(), *buffer, json, image, static_cast<OrthancPluginCreateDicomFlags>(flags)); if (code == OrthancPluginErrorCode_Success) { return PyBytes_FromStringAndSize(buffer.GetData(), buffer.GetSize()); } else { PyErr_SetString(PyExc_ValueError, "Cannot create the DICOM instance"); return NULL; } } } PyObject* GetInstanceData(sdk_OrthancPluginDicomInstance_Object* self, PyObject *args) { // The GIL is locked at this point (no need to create "PythonLock") if (self->object_ == NULL) { PyErr_SetString(PyExc_ValueError, "Invalid object"); return NULL; } else { OrthancPluginDicomInstance* instance = reinterpret_cast<sdk_OrthancPluginDicomInstance_Object*>(self)->object_; const void* data = OrthancPluginGetInstanceData(OrthancPlugins::GetGlobalContext(), instance); size_t size = OrthancPluginGetInstanceSize(OrthancPlugins::GetGlobalContext(), instance); if (data == NULL && size != 0) { PyErr_SetString(PyExc_ValueError, "Accessing an invalid orthanc.DicomInstance object"); return NULL; } else { return PyBytes_FromStringAndSize(reinterpret_cast<const char*>(data), size); } } } /** * Contrarily to "OrthancPluginGetImageBuffer()" that provides a * read-write pointer, the method "orthanc.Image.GetImageBuffer()" * returns a copy of the image buffer. Use "CreateImageFromBuffer()" * to create an image from a Python buffer. **/ PyObject* GetImageBuffer(sdk_OrthancPluginImage_Object* self, PyObject *args) { // The GIL is locked at this point (no need to create "PythonLock") if (self->object_ == NULL) { PyErr_SetString(PyExc_ValueError, "Invalid object"); return NULL; } else { OrthancPluginImage* image = reinterpret_cast<sdk_OrthancPluginImage_Object*>(self)->object_; const void* buffer = OrthancPluginGetImageBuffer(OrthancPlugins::GetGlobalContext(), image); size_t size = (OrthancPluginGetImagePitch(OrthancPlugins::GetGlobalContext(), image) * OrthancPluginGetImageHeight(OrthancPlugins::GetGlobalContext(), image)); if (buffer == NULL && size != 0) { PyErr_SetString(PyExc_ValueError, "Accessing an invalid orthanc.Image object"); return NULL; } else { return PyBytes_FromStringAndSize(reinterpret_cast<const char*>(buffer), size); } } } /** * This function is the Python alternative for function * "OrthancPluginCreateImageAccessor()". Indeed, it is not possible to * share a memory buffer between Orthanc and Python, so we have to * create a copy of the image. **/ PyObject* CreateImageFromBuffer(PyObject* module, PyObject* args) { // The GIL is locked at this point (no need to create "PythonLock") unsigned long format, width, height, sourcePitch; Py_buffer buffer; if (!PyArg_ParseTuple(args, "kkkks*", &format, &width, &height, &sourcePitch, &buffer)) { PyErr_SetString(PyExc_TypeError, "5 arguments are needed: image.PixelFormat, width, height, pitch and memory buffer"); return NULL; } else if (static_cast<Py_ssize_t>(sourcePitch * height) != buffer.len) { PyBuffer_Release(&buffer); PyErr_SetString(PyExc_TypeError, "The size of the memory buffer must match the product of height by pitch"); return NULL; } else { OrthancPluginImage* image = OrthancPluginCreateImage( OrthancPlugins::GetGlobalContext(), static_cast<OrthancPluginPixelFormat>(format), width, height); if (image == NULL) { PyBuffer_Release(&buffer); PyErr_SetString(PyExc_ValueError, "Cannot create the image"); return NULL; } else { // Copy the image line by line unsigned long targetPitch = OrthancPluginGetImagePitch(OrthancPlugins::GetGlobalContext(), image); const uint8_t* sourcePixels = reinterpret_cast<const uint8_t*>(buffer.buf); uint8_t* targetPixels = reinterpret_cast<uint8_t*>(OrthancPluginGetImageBuffer(OrthancPlugins::GetGlobalContext(), image)); unsigned long rowSize = std::min(sourcePitch, targetPitch); for (unsigned int y = 0; y < height; y++) { memcpy(targetPixels, sourcePixels, rowSize); targetPixels += targetPitch; sourcePixels += sourcePitch; } PyBuffer_Release(&buffer); { PyObject *argList = Py_BuildValue("Lb", image, false /* not borrowed */); PyObject *python = PyObject_CallObject((PyObject *) GetOrthancPluginImageType(), argList); Py_DECREF(argList); return python; } } } } static bool pythonEnabled_ = false; static std::string userScriptName_; static std::vector<PyMethodDef> globalFunctions_; static void InstallClasses(PyObject* module) { RegisterOrthancSdk(module); } static void SetupGlobalFunctions() { if (!globalFunctions_.empty()) { ORTHANC_PLUGINS_THROW_EXCEPTION(BadSequenceOfCalls); } /** * Add all the manual global functions **/ std::list<PyMethodDef> functions; { PyMethodDef f = { "RegisterRestCallback", RegisterRestCallback, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "RegisterOnChangeCallback", RegisterOnChangeCallback, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "RegisterOnStoredInstanceCallback", RegisterOnStoredInstanceCallback, METH_VARARGS, "" }; functions.push_back(f); } /** * New in release 3.0 **/ { PyMethodDef f = { "RegisterIncomingHttpRequestFilter", RegisterIncomingHttpRequestFilter, METH_VARARGS, "" }; functions.push_back(f); } /** * New in release 3.2 **/ { PyMethodDef f = { "LookupDictionary", LookupDictionary, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "CreateDicom", CreateDicom, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "CreateImageFromBuffer", CreateImageFromBuffer, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "RegisterFindCallback", RegisterFindCallback, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "RegisterMoveCallback", RegisterMoveCallback, METH_VARARGS, "" }; functions.push_back(f); } { PyMethodDef f = { "RegisterWorklistCallback", RegisterWorklistCallback, METH_VARARGS, "" }; functions.push_back(f); } /** * New in release 3.3 **/ { PyMethodDef f = { "RegisterStorageArea", RegisterStorageArea, METH_VARARGS, "" }; functions.push_back(f); } /** * Append all the global functions that were automatically generated **/ const PyMethodDef* sdk = GetOrthancSdkFunctions(); for (size_t i = 0; sdk[i].ml_name != NULL; i++) { functions.push_back(sdk[i]); } /** * Flatten the list of functions into the vector **/ globalFunctions_.resize(functions.size()); std::copy(functions.begin(), functions.end(), globalFunctions_.begin()); PyMethodDef sentinel = { NULL }; globalFunctions_.push_back(sentinel); } static PyMethodDef* GetGlobalFunctions() { if (globalFunctions_.empty()) { // "SetupGlobalFunctions()" should have been called ORTHANC_PLUGINS_THROW_EXCEPTION(BadSequenceOfCalls); } else { return &globalFunctions_[0]; } } #if HAS_DL_ITERATE == 1 #include <dlfcn.h> #include <link.h> // For dl_phdr_info static int ForceImportCallback(struct dl_phdr_info *info, size_t size, void *data) { /** * The following line solves the error: "ImportError: * /usr/lib/python2.7/dist-packages/PIL/_imaging.x86_64-linux-gnu.so: * undefined symbol: PyExc_SystemError" * https://stackoverflow.com/a/48517485/881731 * * dlopen("/usr/lib/x86_64-linux-gnu/libpython2.7.so", RTLD_NOW | RTLD_LAZY | RTLD_GLOBAL); * * Another fix consists in using LD_PRELOAD as follows: * LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libpython2.7.so ~/Subversion/orthanc/i/Orthanc tutu.json **/ std::string module(info->dlpi_name); if (module.find("python") != std::string::npos) { OrthancPlugins::LogWarning("Force global loading of Python shared library: " + module); dlopen(module.c_str(), RTLD_NOW | RTLD_LAZY | RTLD_GLOBAL); } return 0; } #endif extern "C" { ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* c) { OrthancPlugins::SetGlobalContext(c); OrthancPlugins::LogWarning("Python plugin is initializing"); /* Check the version of the Orthanc core */ if (OrthancPluginCheckVersion(c) == 0) { char info[1024]; sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin", c->orthancVersion, ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER, ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER, ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER); OrthancPluginLogError(c, info); return -1; } OrthancPluginSetDescription(c, "Run Python scripts as Orthanc plugins"); try { /** * Detection of the user script **/ OrthancPlugins::OrthancConfiguration config; static const char* const OPTION = "PythonScript"; std::string script; if (!config.LookupStringValue(script, OPTION)) { pythonEnabled_ = false; OrthancPlugins::LogWarning("The option \"" + std::string(OPTION) + "\" is not provided: " + "Python scripting is disabled"); } else { pythonEnabled_ = true; /** * Installation of the user script **/ const boost::filesystem::path path(script); if (!boost::iequals(path.extension().string(), ".py")) { OrthancPlugins::LogError("Python script must have the \".py\" file extension: " + path.string()); return -1; } if (!boost::filesystem::is_regular_file(path)) { OrthancPlugins::LogError("Inexistent directory for the Python script: " + path.string()); return -1; } boost::filesystem::path userScriptDirectory = boost::filesystem::absolute(path).parent_path(); { boost::filesystem::path module = path.filename().replace_extension(""); userScriptName_ = module.string(); } OrthancPlugins::LogWarning("Using Python script \"" + userScriptName_ + ".py\" from directory: " + userScriptDirectory.string()); /** * Initialization of Python **/ #if HAS_DL_ITERATE == 1 dl_iterate_phdr(ForceImportCallback, NULL); #endif SetupGlobalFunctions(); PythonLock::GlobalInitialize("orthanc", "OrthancException", GetGlobalFunctions, InstallClasses, config.GetBooleanValue("PythonVerbose", false)); PythonLock::AddSysPath(userScriptDirectory.string()); /** * Force loading the declarations in the user script **/ PythonLock lock; { PythonModule module(lock, userScriptName_); } std::string traceback; if (lock.HasErrorOccurred(traceback)) { OrthancPlugins::LogError("Error during the installation of the Python script, " "traceback:\n" + traceback); return -1; } } } catch (ORTHANC_PLUGINS_EXCEPTION_CLASS& e) { OrthancPlugins::LogError("Exception while starting the Python plugin: " + std::string(e.What(c))); return -1; } return 0; } ORTHANC_PLUGINS_API void OrthancPluginFinalize() { OrthancPlugins::LogWarning("Python plugin is finalizing"); if (pythonEnabled_) { FinalizeOnChangeCallback(); FinalizeRestCallbacks(); FinalizeOnStoredInstanceCallback(); FinalizeIncomingHttpRequestFilter(); FinalizeDicomScpCallbacks(); PythonLock::GlobalFinalize(); } } ORTHANC_PLUGINS_API const char* OrthancPluginGetName() { return "python"; } ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion() { return PLUGIN_VERSION; } }