add

+/**************************************************************************
+* file:              dmppythonutils.cpp
+
+* Author:            wanzhongping
+* Date:              2021-04-20 13:38:27
+* Email:             zhongpingw@chinadci.com
+* copyright:         广州城市信息研究所有限公司
+***************************************************************************/
+
+
+#include "dmppythonutils.h"
+#include "dmplogger.h"
+#include "dmpapplication.h"
+#include "../dmpserverinterface.h"
+#include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/filesystem.hpp>
+
+namespace python = boost::python;
+
+#define INIT_MODULE PyInit_dmap_server
+extern "C" PyObject *INIT_MODULE();
+
+DmpPythonUtils::DmpPythonUtils()
+{
+}
+
+DmpPythonUtils::~DmpPythonUtils()
+{
+    ExitPython();
+}
+
+void DmpPythonUtils::Init()
+{
+    if (PyImport_AppendInittab("dmap_server", INIT_MODULE) == -1)
+        throw std::runtime_error("Failed to add dmap_server to the interpreter's "
+                                 "builtin modules");
+    Py_Initialize();
+    python_enabled_ = true;
+    main_module_ = python::import("__main__");
+    main_namespace_ = main_module_.attr("__dict__");
+}
+
+bool DmpPythonUtils::CheckSystemImports()
+{
+    RunString("import sys");
+    RunString("import os");
+
+    std::string pluginpaths;
+    std::vector<std::string> vec_paths = ExtraPluginsPaths();
+    std::vector<std::string>::iterator iter;
+    std::string comma = ",";
+    for (iter = vec_paths.begin(); iter != vec_paths.end(); iter++)
+    {
+        if (!boost::filesystem::exists(*iter))
+        {
+            boost::format fmt = boost::format("The extra plugin path '%1' does not exist!") % *iter;
+            LOGGER_WARN(fmt.str());
+        }
+
+        if (!pluginpaths.empty())
+        {
+            pluginpaths += comma;
+        }
+        pluginpaths += '"' + *iter + '"';
+    }
+    if (!pluginpaths.empty())
+    {
+        pluginpaths += comma;
+    }
+    pluginpaths += '"' + HomePluginsPath() + '"';
+    pluginpaths += comma + '"' + PluginsPath() + '"';
+
+    // expect that bindings are installed locally, so add the path to modules
+    // also add path to plugins
+    std::string newpaths;
+    newpaths += '"' + PythonPath() + '"' + comma;
+    newpaths += '"' + HomePythonPath() + '"' + comma;
+    newpaths += pluginpaths;
+
+    RunString("sys.path = [" + newpaths + "] + sys.path");
+
+    if (!RunString("import dmap.utils"))
+    {
+        return false;
+    }
+
+    boost::format fmt_plugin_paths = boost::format("dmap.utils.plugin_paths = [%1%]") % pluginpaths;
+    RunString(fmt_plugin_paths.str());
+    boost::format fmt_sys_plugin_paths = boost::format("dmap.utils.sys_plugin_path = \"%1%\"") % PluginsPath();
+    RunString(fmt_sys_plugin_paths.str());
+    boost::format fmt_home_plugin_paths = boost::format("dmap.utils.home_plugin_path = \"%1%\"") % HomePluginsPath();
+    RunString(fmt_home_plugin_paths.str());
+
+    return true;
+}
+
+bool DmpPythonUtils::RunString(const std::string &command, bool single)
+{
+    try
+    {
+        std::cout << command << std::endl;
+        if(single){
+            python::exec(command.c_str(), main_namespace_, main_namespace_);
+        }else
+        {
+            python::exec_file(command.c_str(), main_namespace_, main_namespace_);
+        }
+        
+    }
+    catch (const python::error_already_set &)
+    {
+        std::cerr << ">>> Error! Uncaught exception:\n";
+        PyErr_Print();
+        return false;
+    }
+    return true;
+}
+
+bool DmpPythonUtils::EvalString(const std::string &command, std::string &result )
+{
+    try
+    {
+        std::cout << command << std::endl;
+        python::object  res = python::eval(command.c_str(), main_namespace_, main_namespace_);
+        result = python::extract<std::string>(res);
+    }
+    catch (const python::error_already_set &)
+    {
+        std::cerr << ">>> Error! Uncaught exception:\n";
+        PyErr_Print();
+        return false;
+    }
+    return true;
+}
+
+
+void DmpPythonUtils::InitServerPython(DmpServerInterface *interface)
+{
+    Init();
+    if (!CheckSystemImports())
+    {
+        ExitPython();
+        return;
+    }
+    
+    try
+    {
+        python::import("dmap_server");
+        main_namespace_["serverIface_"] = boost::python::ptr(interface);
+        RunString("dmap.utils.initServerInterface(serverIface_)");
+    }
+    catch (python::error_already_set &e)
+    {
+        PyErr_PrintEx(0);
+    }
+    //Finish();
+}
+
+bool DmpPythonUtils::StartServerPlugin(std::string packageName)
+{
+    boost::format fmt = boost::format("dmap.utils.startServerPlugin('%1%')") % packageName;
+    try
+    {    
+        std::cout << fmt.str() << std::endl; 
+        python::object res = python::eval(fmt.str().c_str(), main_namespace_, main_namespace_);
+        return python::extract<bool>(res);
+    }
+    catch (const python::error_already_set &)
+    {
+        std::cerr << ">>> Error! Uncaught exception:\n";
+        PyErr_Print();
+    }
+    return false;
+}
+
+void DmpPythonUtils::Finish()
+{
+    // release GIL!
+    // Later on, we acquire GIL just before doing some Python calls and
+    // release GIL again when the work with Python API is done.
+    // (i.e. there must be PyGILState_Ensure + PyGILState_Release pair
+    // around any calls to Python API, otherwise we may segfault!)
+    //main_state_ = PyEval_SaveThread();
+}
+
+std::vector<std::string> DmpPythonUtils::ExtraPluginsPaths() const
+{
+    std::vector<std::string> vec_paths;
+    const char *paths = getenv("DMAP_PLUGINPATH");
+    if (paths)
+    {
+        if (boost::icontains(paths, ";"))
+        {
+            boost::split(vec_paths, paths, boost::is_any_of(";"), boost::token_compress_on);
+        }
+        else
+        {
+            vec_paths.push_back(paths);
+        }
+    }
+    return vec_paths;
+}
+
+std::string DmpPythonUtils::PythonPath() const
+{
+    if (DmpApplication::IsRunningFromBuildDir())
+        return DmpApplication::build_output_path() + "/python";
+    else
+        return DmpApplication::pkg_data_path() + "/python";
+}
+
+std::string DmpPythonUtils::PluginsPath() const
+{
+    return PythonPath() + "/plugins";
+}
+
+std::string DmpPythonUtils::HomePythonPath() const
+{
+    std::string settingsDir = DmpApplication::DMapSettingsDirPath();
+    boost::format fmt = boost::format("%1%/python") % settingsDir;
+    return fmt.str();
+}
+
+std::string DmpPythonUtils::HomePluginsPath() const
+{
+    return HomePythonPath() + "/plugins";
+}
+
+bool DmpPythonUtils::IsEnabled()
+{
+    return python_enabled_;
+}
+
+bool DmpPythonUtils::LoadPlugin(const std::string &packageName)
+{
+    boost::format fmt = boost::format("dmap.utils.loadPlugin('%1%')") % packageName;
+    try
+    {   std::cout << fmt.str() << std::endl; 
+        python::object res = python::eval(fmt.str().c_str(), main_namespace_, main_namespace_);
+        return python::extract<bool>(res);
+    }
+    catch (const python::error_already_set &)
+    {
+        std::cerr << ">>> Error! Uncaught exception:\n";
+        PyErr_Print();
+    }
+    return false;
+}
+
+void DmpPythonUtils::UninstallErrorHook()
+{
+    RunString("qgis.utils.uninstallErrorHook()");
+}
+std::string DmpPythonUtils::GetPluginMetadata(const std::string &pluginName, const std::string &function)
+{
+    std::string res;
+    boost::format fmt = boost::format("dmap.utils.pluginMetadata('%1%', '%2%')") % pluginName % function;
+    EvalString(fmt.str(), res);
+    LOGGER_DEBUG("metadata " + pluginName + " - '" + function + "' = " + res);
+    return res;
+}
+std::vector<std::string> DmpPythonUtils::PluginList()
+{
+    RunString("dmap.utils.updateAvailablePlugins()");
+
+    std::string output;
+    EvalString("'\\n'.join(dmap.utils.available_plugins)", output);
+
+    std::vector<std::string> vec_plugins;
+    boost::split(vec_plugins, output, boost::is_any_of("\n"), boost::token_compress_on);
+    return vec_plugins;
+}
+void DmpPythonUtils::ExitPython()
+{
+    if (error_hook_installed_)
+        UninstallErrorHook();
+    // causes segfault!
+    //Py_Finalize();
+    // main_module_ = nullptr;
+    // main_dict_ = nullptr;
+    python_enabled_ = false;
+}
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