mirror of
https://github.com/samba-team/samba.git
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15d0166340
This patch uses the fact that dyn_PYTHONDIR and dyn_PYTHONARCHDIR is now set properly at all times, incluidng for installed and build-directory binaries. So we don't need to make assumptions about bin being magic any more. Andrew Bartlett
409 lines
11 KiB
C
409 lines
11 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright © Jelmer Vernooij <jelmer@samba.org> 2008
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Implementation of the WSGI interface described in PEP0333
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(http://www.python.org/dev/peps/pep-0333)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <Python.h>
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#include "includes.h"
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#include "web_server/web_server.h"
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#include "../lib/util/dlinklist.h"
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#include "lib/tls/tls.h"
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#include "lib/tsocket/tsocket.h"
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#include "scripting/python/modules.h"
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/* There's no Py_ssize_t in 2.4, apparently */
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#if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 5
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typedef int Py_ssize_t;
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typedef inquiry lenfunc;
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typedef intargfunc ssizeargfunc;
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#endif
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typedef struct {
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PyObject_HEAD
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struct websrv_context *web;
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} web_request_Object;
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static PyObject *start_response(PyObject *self, PyObject *args, PyObject *kwargs)
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{
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PyObject *response_header, *exc_info = NULL;
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char *status;
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Py_ssize_t i;
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const char *kwnames[] = {
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"status", "response_header", "exc_info", NULL
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};
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web_request_Object *py_web = (web_request_Object *)self;
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struct websrv_context *web = py_web->web;
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struct http_header *headers = NULL;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|O:start_response", discard_const_p(char *, kwnames), &status, &response_header, &exc_info)) {
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return NULL;
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}
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/* FIXME: exc_info */
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if (!PyList_Check(response_header)) {
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PyErr_SetString(PyExc_TypeError, "response_header should be list");
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return NULL;
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}
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for (i = 0; i < PyList_Size(response_header); i++) {
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struct http_header *hdr = talloc_zero(web, struct http_header);
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PyObject *item = PyList_GetItem(response_header, i);
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PyObject *py_name, *py_value;
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if (!PyTuple_Check(item)) {
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PyErr_SetString(PyExc_TypeError, "Expected tuple");
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return NULL;
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}
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if (PyTuple_Size(item) != 2) {
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PyErr_SetString(PyExc_TypeError, "header tuple has invalid size, expected 2");
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return NULL;
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}
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py_name = PyTuple_GetItem(item, 0);
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if (!PyString_Check(py_name)) {
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PyErr_SetString(PyExc_TypeError, "header name should be string");
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return NULL;
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}
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py_value = PyTuple_GetItem(item, 1);
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if (!PyString_Check(py_value)) {
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PyErr_SetString(PyExc_TypeError, "header value should be string");
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return NULL;
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}
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hdr->name = talloc_strdup(hdr, PyString_AsString(py_name));
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hdr->value = talloc_strdup(hdr, PyString_AsString(py_value));
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DLIST_ADD(headers, hdr);
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}
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websrv_output_headers(web, status, headers);
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Py_RETURN_NONE;
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}
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static PyMethodDef web_request_methods[] = {
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{ "start_response", (PyCFunction)start_response, METH_VARARGS|METH_KEYWORDS, NULL },
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{ NULL }
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};
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PyTypeObject web_request_Type = {
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PyObject_HEAD_INIT(NULL) 0,
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.tp_name = "wsgi.Request",
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.tp_methods = web_request_methods,
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.tp_basicsize = sizeof(web_request_Object),
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.tp_flags = Py_TPFLAGS_DEFAULT,
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};
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typedef struct {
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PyObject_HEAD
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} error_Stream_Object;
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static PyObject *py_error_flush(PyObject *self, PyObject *args, PyObject *kwargs)
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{
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/* Nothing to do here */
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Py_RETURN_NONE;
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}
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static PyObject *py_error_write(PyObject *self, PyObject *args, PyObject *kwargs)
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{
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const char *kwnames[] = { "str", NULL };
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char *str = NULL;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:write", discard_const_p(char *, kwnames), &str)) {
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return NULL;
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}
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DEBUG(0, ("WSGI App: %s", str));
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Py_RETURN_NONE;
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}
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static PyObject *py_error_writelines(PyObject *self, PyObject *args, PyObject *kwargs)
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{
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const char *kwnames[] = { "seq", NULL };
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PyObject *seq = NULL, *item;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:writelines", discard_const_p(char *, kwnames), &seq)) {
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return NULL;
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}
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while ((item = PyIter_Next(seq))) {
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char *str = PyString_AsString(item);
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DEBUG(0, ("WSGI App: %s", str));
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}
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Py_RETURN_NONE;
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}
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static PyMethodDef error_Stream_methods[] = {
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{ "flush", (PyCFunction)py_error_flush, METH_VARARGS|METH_KEYWORDS, NULL },
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{ "write", (PyCFunction)py_error_write, METH_VARARGS|METH_KEYWORDS, NULL },
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{ "writelines", (PyCFunction)py_error_writelines, METH_VARARGS|METH_KEYWORDS, NULL },
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{ NULL, NULL, 0, NULL }
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};
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PyTypeObject error_Stream_Type = {
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PyObject_HEAD_INIT(NULL) 0,
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.tp_name = "wsgi.ErrorStream",
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.tp_basicsize = sizeof(error_Stream_Object),
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.tp_methods = error_Stream_methods,
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.tp_flags = Py_TPFLAGS_DEFAULT,
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};
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typedef struct {
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PyObject_HEAD
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struct websrv_context *web;
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size_t offset;
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} input_Stream_Object;
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static PyObject *py_input_read(PyObject *_self, PyObject *args, PyObject *kwargs)
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{
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const char *kwnames[] = { "size", NULL };
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PyObject *ret;
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input_Stream_Object *self = (input_Stream_Object *)_self;
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int size = -1;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i", discard_const_p(char *, kwnames), &size))
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return NULL;
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/* Don't read beyond buffer boundaries */
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if (size == -1)
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size = self->web->input.partial.length-self->offset;
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else
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size = MIN(size, self->web->input.partial.length-self->offset);
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ret = PyString_FromStringAndSize((char *)self->web->input.partial.data+self->offset, size);
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self->offset += size;
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return ret;
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}
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static PyObject *py_input_readline(PyObject *_self)
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{
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/* FIXME */
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PyErr_SetString(PyExc_NotImplementedError,
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"readline() not yet implemented");
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return NULL;
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}
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static PyObject *py_input_readlines(PyObject *_self, PyObject *args, PyObject *kwargs)
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{
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const char *kwnames[] = { "hint", NULL };
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int hint;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i", discard_const_p(char *, kwnames), &hint))
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return NULL;
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/* FIXME */
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PyErr_SetString(PyExc_NotImplementedError,
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"readlines() not yet implemented");
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return NULL;
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}
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static PyObject *py_input___iter__(PyObject *_self)
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{
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/* FIXME */
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PyErr_SetString(PyExc_NotImplementedError,
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"__iter__() not yet implemented");
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return NULL;
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}
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static PyMethodDef input_Stream_methods[] = {
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{ "read", (PyCFunction)py_input_read, METH_VARARGS|METH_KEYWORDS, NULL },
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{ "readline", (PyCFunction)py_input_readline, METH_NOARGS, NULL },
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{ "readlines", (PyCFunction)py_input_readlines, METH_VARARGS|METH_KEYWORDS, NULL },
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{ "__iter__", (PyCFunction)py_input___iter__, METH_NOARGS, NULL },
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{ NULL, NULL, 0, NULL }
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};
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PyTypeObject input_Stream_Type = {
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PyObject_HEAD_INIT(NULL) 0,
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.tp_name = "wsgi.InputStream",
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.tp_basicsize = sizeof(input_Stream_Object),
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.tp_methods = input_Stream_methods,
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.tp_flags = Py_TPFLAGS_DEFAULT,
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};
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static PyObject *Py_InputHttpStream(struct websrv_context *web)
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{
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input_Stream_Object *ret = PyObject_New(input_Stream_Object, &input_Stream_Type);
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ret->web = web;
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ret->offset = 0;
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return (PyObject *)ret;
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}
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static PyObject *Py_ErrorHttpStream(void)
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{
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error_Stream_Object *ret = PyObject_New(error_Stream_Object, &error_Stream_Type);
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return (PyObject *)ret;
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}
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static PyObject *create_environ(bool tls, int content_length, struct http_header *headers, const char *request_method, const char *servername, int serverport, PyObject *inputstream, const char *request_string)
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{
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PyObject *env;
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PyObject *errorstream;
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PyObject *py_scheme;
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struct http_header *hdr;
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char *questionmark;
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env = PyDict_New();
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if (env == NULL) {
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return NULL;
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}
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errorstream = Py_ErrorHttpStream();
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if (errorstream == NULL) {
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Py_DECREF(env);
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Py_DECREF(inputstream);
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return NULL;
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}
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PyDict_SetItemString(env, "wsgi.input", inputstream);
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PyDict_SetItemString(env, "wsgi.errors", errorstream);
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PyDict_SetItemString(env, "wsgi.version", Py_BuildValue("(i,i)", 1, 0));
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PyDict_SetItemString(env, "wsgi.multithread", Py_False);
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PyDict_SetItemString(env, "wsgi.multiprocess", Py_True);
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PyDict_SetItemString(env, "wsgi.run_once", Py_False);
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PyDict_SetItemString(env, "SERVER_PROTOCOL", PyString_FromString("HTTP/1.0"));
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if (content_length > 0) {
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PyDict_SetItemString(env, "CONTENT_LENGTH", PyLong_FromLong(content_length));
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}
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PyDict_SetItemString(env, "REQUEST_METHOD", PyString_FromString(request_method));
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questionmark = strchr(request_string, '?');
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if (questionmark == NULL) {
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PyDict_SetItemString(env, "SCRIPT_NAME", PyString_FromString(request_string));
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} else {
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PyDict_SetItemString(env, "QUERY_STRING", PyString_FromString(questionmark+1));
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PyDict_SetItemString(env, "SCRIPT_NAME", PyString_FromStringAndSize(request_string, questionmark-request_string));
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}
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PyDict_SetItemString(env, "SERVER_NAME", PyString_FromString(servername));
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PyDict_SetItemString(env, "SERVER_PORT", PyInt_FromLong(serverport));
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for (hdr = headers; hdr; hdr = hdr->next) {
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char *name;
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if (!strcasecmp(hdr->name, "Content-Type")) {
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PyDict_SetItemString(env, "CONTENT_TYPE", PyString_FromString(hdr->value));
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} else {
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if (asprintf(&name, "HTTP_%s", hdr->name) < 0) {
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Py_DECREF(env);
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Py_DECREF(inputstream);
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PyErr_NoMemory();
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return NULL;
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}
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PyDict_SetItemString(env, name, PyString_FromString(hdr->value));
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free(name);
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}
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}
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if (tls) {
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py_scheme = PyString_FromString("https");
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} else {
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py_scheme = PyString_FromString("http");
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}
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PyDict_SetItemString(env, "wsgi.url_scheme", py_scheme);
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return env;
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}
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static void wsgi_process_http_input(struct web_server_data *wdata,
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struct websrv_context *web)
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{
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PyObject *py_environ, *result, *item, *iter;
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PyObject *request_handler = (PyObject *)wdata->private_data;
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struct tsocket_address *my_address = web->conn->local_address;
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const char *addr = "0.0.0.0";
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uint16_t port = 0;
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web_request_Object *py_web = PyObject_New(web_request_Object, &web_request_Type);
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py_web->web = web;
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if (tsocket_address_is_inet(my_address, "ip")) {
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addr = tsocket_address_inet_addr_string(my_address, wdata);
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port = tsocket_address_inet_port(my_address);
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}
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py_environ = create_environ(tls_enabled(web->conn->socket),
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web->input.content_length,
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web->input.headers,
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web->input.post_request?"POST":"GET",
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addr,
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port,
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Py_InputHttpStream(web),
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web->input.url
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);
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if (py_environ == NULL) {
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DEBUG(0, ("Unable to create WSGI environment object\n"));
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return;
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}
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result = PyObject_CallMethod(request_handler, discard_const_p(char, "__call__"), discard_const_p(char, "OO"),
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py_environ, PyObject_GetAttrString((PyObject *)py_web, "start_response"));
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if (result == NULL) {
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DEBUG(0, ("error while running WSGI code\n"));
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return;
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}
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iter = PyObject_GetIter(result);
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Py_DECREF(result);
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/* Now, iter over all the data returned */
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while ((item = PyIter_Next(iter))) {
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websrv_output(web, PyString_AsString(item), PyString_Size(item));
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Py_DECREF(item);
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}
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Py_DECREF(iter);
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}
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bool wsgi_initialize(struct web_server_data *wdata)
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{
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PyObject *py_web_server;
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Py_Initialize();
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py_update_path(); /* Ensure that we have the Samba paths at
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* the start of the sys.path() */
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if (PyType_Ready(&web_request_Type) < 0)
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return false;
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if (PyType_Ready(&input_Stream_Type) < 0)
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return false;
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if (PyType_Ready(&error_Stream_Type) < 0)
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return false;
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wdata->http_process_input = wsgi_process_http_input;
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py_web_server = PyImport_ImportModule("samba.web_server");
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if (py_web_server == NULL) {
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DEBUG(0, ("Unable to find web server\n"));
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return false;
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}
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wdata->private_data = py_web_server;
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return true;
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}
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