uwsgi/plugins/python/wsgi_subhandler.c

#include "uwsgi_python.h"

extern struct uwsgi_server uwsgi;
extern struct uwsgi_python up;

void *uwsgi_request_subhandler_wsgi(struct wsgi_request *wsgi_req, struct uwsgi_app *wi) {

	PyObject *zero;

	//static PyObject *uwsgi_version = NULL;

	/*
	   if (uwsgi_version == NULL) {
	   uwsgi_version = PyString_FromString(UWSGI_VERSION);
	   }
	   */


#ifdef UWSGI_SENDFILE
	PyDict_SetItemString(wsgi_req->async_environ, "wsgi.file_wrapper", wi->sendfile);
#endif

#ifdef UWSGI_ASYNC
	if (uwsgi.async > 1) {
		PyDict_SetItemString(wsgi_req->async_environ, "x-wsgiorg.fdevent.readable", wi->eventfd_read);
		PyDict_SetItemString(wsgi_req->async_environ, "x-wsgiorg.fdevent.writable", wi->eventfd_write);
		PyDict_SetItemString(wsgi_req->async_environ, "x-wsgiorg.fdevent.timeout", Py_None);
	}
#endif

	// cache this
	zero = PyTuple_New(2);
	PyTuple_SetItem(zero, 0, PyInt_FromLong(1));
	PyTuple_SetItem(zero, 1, PyInt_FromLong(0));
	PyDict_SetItemString(wsgi_req->async_environ, "wsgi.version", zero);
	Py_DECREF(zero);

	zero = PyFile_FromFile(stderr, "wsgi_input", "w", NULL);
	PyDict_SetItemString(wsgi_req->async_environ, "wsgi.errors", zero);
	Py_DECREF(zero);

	PyDict_SetItemString(wsgi_req->async_environ, "wsgi.run_once", Py_False);

	if (uwsgi.threads > 1) {
		PyDict_SetItemString(wsgi_req->async_environ, "wsgi.multithread", Py_True);
	}
	else {
		PyDict_SetItemString(wsgi_req->async_environ, "wsgi.multithread", Py_False);
	}
	if (uwsgi.numproc == 1) {
		PyDict_SetItemString(wsgi_req->async_environ, "wsgi.multiprocess", Py_False);
	}
	else {
		PyDict_SetItemString(wsgi_req->async_environ, "wsgi.multiprocess", Py_True);
	}

	if (wsgi_req->scheme_len > 0) {
		zero = PyString_FromStringAndSize(wsgi_req->scheme, wsgi_req->scheme_len);
	}
	else if (wsgi_req->https_len > 0) {
		if (!strncasecmp(wsgi_req->https, "on", 2) || wsgi_req->https[0] == '1') {
			zero = PyString_FromString("https");
		}
		else {
			zero = PyString_FromString("http");
		}
	}
	else {
		zero = PyString_FromString("http");
	}
	PyDict_SetItemString(wsgi_req->async_environ, "wsgi.url_scheme", zero);
	Py_DECREF(zero);


	wsgi_req->async_app = wi->callable;

	// export .env only in non-threaded mode
	if (uwsgi.threads < 2) {
		PyDict_SetItemString(up.embedded_dict, "env", wsgi_req->async_environ);
	}

	zero = PyString_FromString(UWSGI_VERSION);
	PyDict_SetItemString(wsgi_req->async_environ, "uwsgi.version", zero);
	Py_DECREF(zero);

	if (uwsgi.cores > 1) {
		PyDict_SetItemString(wsgi_req->async_environ, "uwsgi.core", PyInt_FromLong(wsgi_req->async_id));
	}

	if (uwsgi.cluster_fd >= 0) {
		zero = PyString_FromString(uwsgi.cluster);
		PyDict_SetItemString(wsgi_req->async_environ, "uwsgi.cluster", zero);
		Py_DECREF(zero);
		zero = PyString_FromString(uwsgi.hostname);
		PyDict_SetItemString(wsgi_req->async_environ, "uwsgi.cluster_node", zero);
		Py_DECREF(zero);
	}


#ifdef UWSGI_ROUTING
	uwsgi_log("routing %d routes %d\n", uwsgi.routing, uwsgi.nroutes);
	if (uwsgi.routing && uwsgi.nroutes > 0) {
		check_route(uwsgi, wsgi_req);
	}
#endif


	// call


	PyTuple_SetItem(wsgi_req->async_args, 0, wsgi_req->async_environ);
	return python_call(wsgi_req->async_app, wsgi_req->async_args, up.catch_exceptions);
}

int uwsgi_response_subhandler_wsgi(struct wsgi_request *wsgi_req) {

	PyObject *pychunk;
	ssize_t wsize;
#ifdef UWSGI_SENDFILE
	ssize_t sf_len = 0;
#endif

	UWSGI_GET_GIL

	// return or yield ?
	if (PyString_Check((PyObject *)wsgi_req->async_result)) {
		if ((wsize = wsgi_req->socket->proto_write(wsgi_req, PyString_AsString(wsgi_req->async_result), PyString_Size(wsgi_req->async_result))) < 0) {
			uwsgi_error("write()");
			goto clear;
		}
		wsgi_req->response_size += wsize;
		goto clear;
	}


#ifdef UWSGI_SENDFILE
	if (wsgi_req->sendfile_obj == wsgi_req->async_result && wsgi_req->sendfile_fd != -1) {
		sf_len = uwsgi_sendfile(wsgi_req);
		if (sf_len < 1) goto clear;
		wsgi_req->response_size += sf_len;
#ifdef UWSGI_ASYNC
		if (uwsgi.async > 1) {
			if (wsgi_req->response_size < wsgi_req->sendfile_fd_size) {
				UWSGI_RELEASE_GIL
				return UWSGI_AGAIN;
			}
		}
#endif
		goto clear;
	}
#endif


	// ok its a yield
	if (!wsgi_req->async_placeholder) {
		wsgi_req->async_placeholder = PyObject_GetIter(wsgi_req->async_result);
		if (!wsgi_req->async_placeholder) {
			goto clear2;
		}
#ifdef UWSGI_ASYNC
		if (uwsgi.async > 1) {
			UWSGI_RELEASE_GIL
			return UWSGI_AGAIN;
		}
#endif
	}




	pychunk = PyIter_Next(wsgi_req->async_placeholder);

	if (!pychunk) {
		if (PyErr_Occurred()) { 
		        if (PyErr_ExceptionMatches(PyExc_MemoryError)) {
				uwsgi_log("Memory Error detected !!!\n");	
			}		
			uwsgi.workers[uwsgi.mywid].exceptions++;
			PyErr_Print();
		}	
		goto clear;
	}




	if (PyString_Check(pychunk)) {
		if ((wsize = wsgi_req->socket->proto_write(wsgi_req, PyString_AsString(pychunk), PyString_Size(pychunk))) < 0) {
			uwsgi_error("write()");
			Py_DECREF(pychunk);
			goto clear;
		}
		wsgi_req->response_size += wsize;
	}

#ifdef UWSGI_SENDFILE
	else if (wsgi_req->sendfile_obj == pychunk && wsgi_req->sendfile_fd != -1) {
		sf_len = uwsgi_sendfile(wsgi_req);
		if (sf_len < 1) goto clear;
		wsgi_req->response_size += sf_len;
	}
#endif


	Py_DECREF(pychunk);
	UWSGI_RELEASE_GIL
	return UWSGI_AGAIN;

clear:

	if (wsgi_req->sendfile_fd != -1) {
		Py_DECREF((PyObject *)wsgi_req->async_sendfile);
	}
	if (wsgi_req->async_input) {
		Py_DECREF((PyObject *)wsgi_req->async_input);
	}
	if (wsgi_req->async_environ) {
		PyDict_Clear(wsgi_req->async_environ);
	}
	Py_XDECREF((PyObject *)wsgi_req->async_placeholder);
clear2:
	Py_DECREF((PyObject *)wsgi_req->async_result);
	PyErr_Clear();

	UWSGI_RELEASE_GIL
	return UWSGI_OK;
}