Merge branch 'master' of ssh://git.samba.org/data/git/samba

1 files changed, 391 insertions, 0 deletions

diff --git a/source4/web_server/wsgi.c b/source4/web_server/wsgi.c
new file mode 100644
index 0000000000..66697868e0
--- /dev/null
+++ b/source4/web_server/wsgi.c
@@ -0,0 +1,391 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright © Jelmer Vernooij <jelmer@samba.org> 2008
+
+   Implementation of the WSGI interface described in PEP0333 
+   (http://www.python.org/dev/peps/pep-0333)
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU 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 General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "web_server/web_server.h"
+#include "lib/util/dlinklist.h"
+#include "lib/util/data_blob.h"
+#include "lib/tls/tls.h"
+#include <Python.h>
+
+typedef struct {
+	PyObject_HEAD
+	struct websrv_context *web;
+} web_request_Object;
+
+static PyObject *start_response(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	PyObject *response_header, *exc_info = NULL;
+	char *status;
+	int i;
+	const char *kwnames[] = {
+		"status", "response_header", "exc_info", NULL
+	};
+	web_request_Object *py_web = (web_request_Object *)self;
+	struct websrv_context *web = py_web->web;
+	struct http_header *headers = NULL;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|O:start_response", discard_const_p(char *, kwnames), &status, &response_header, &exc_info)) {
+		return NULL;
+	}
+
+	/* FIXME: exc_info */
+
+	if (!PyList_Check(response_header)) {
+		PyErr_SetString(PyExc_TypeError, "response_header should be list");
+		return NULL;
+	}
+
+	for (i = 0; i < PyList_Size(response_header); i++) {
+		struct http_header *hdr = talloc_zero(web, struct http_header);
+		PyObject *item = PyList_GetItem(response_header, i);
+		PyObject *py_name, *py_value;
+
+		if (!PyTuple_Check(item)) {
+			PyErr_SetString(PyExc_TypeError, "Expected tuple");
+			return NULL;
+		}
+
+		if (PyTuple_Size(item) != 2) {
+			PyErr_SetString(PyExc_TypeError, "header tuple has invalid size, expected 2");
+			return NULL;
+		}
+
+		py_name = PyTuple_GetItem(item, 0);
+
+		if (!PyString_Check(py_name)) {
+			PyErr_SetString(PyExc_TypeError, "header name should be string");
+			return NULL;
+		}
+
+		py_value = PyTuple_GetItem(item, 1);
+		if (!PyString_Check(py_value)) {
+			PyErr_SetString(PyExc_TypeError, "header value should be string");
+			return NULL;
+		}
+
+		hdr->name = talloc_strdup(hdr, PyString_AsString(py_name));
+		hdr->value = talloc_strdup(hdr, PyString_AsString(py_value));
+		DLIST_ADD(headers, hdr);
+	}
+
+	websrv_output_headers(web, status, headers);
+
+	return Py_None;
+}
+
+static PyMethodDef web_request_methods[] = {
+	{ "start_response", (PyCFunction)start_response, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ NULL }
+};
+
+
+PyTypeObject web_request_Type = {
+	PyObject_HEAD_INIT(NULL) 0,
+	.tp_name = "wsgi.Request",
+	.tp_methods = web_request_methods,
+	.tp_basicsize = sizeof(web_request_Object),
+	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+};
+
+typedef struct {
+	PyObject_HEAD
+} error_Stream_Object;
+
+static PyObject *py_error_flush(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	/* Nothing to do here */
+	return Py_None;
+}
+
+static PyObject *py_error_write(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	const char *kwnames[] = { "str", NULL };
+	char *str = NULL;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:write", discard_const_p(char *, kwnames), &str)) {
+		return NULL;
+	}
+
+	DEBUG(0, ("WSGI App: %s", str));
+
+	return Py_None;
+}
+
+static PyObject *py_error_writelines(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	const char *kwnames[] = { "seq", NULL };
+	PyObject *seq = NULL, *item;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:writelines", discard_const_p(char *, kwnames), &seq)) {
+		return NULL;
+	}
+	
+	while ((item = PyIter_Next(seq))) {
+		char *str = PyString_AsString(item);
+
+		DEBUG(0, ("WSGI App: %s", str));
+	}
+
+	return Py_None;
+}
+
+static PyMethodDef error_Stream_methods[] = {
+	{ "flush", (PyCFunction)py_error_flush, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ "write", (PyCFunction)py_error_write, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ "writelines", (PyCFunction)py_error_writelines, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ NULL, NULL, 0, NULL }
+};
+
+PyTypeObject error_Stream_Type = {
+	PyObject_HEAD_INIT(NULL) 0,
+	.tp_name = "wsgi.ErrorStream",
+	.tp_basicsize = sizeof(error_Stream_Object),
+	.tp_methods = error_Stream_methods,
+	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+};
+
+typedef struct {
+	PyObject_HEAD
+	struct websrv_context *web;
+	size_t offset;
+} input_Stream_Object;
+
+static PyObject *py_input_read(PyObject *_self, PyObject *args, PyObject *kwargs)
+{
+	const char *kwnames[] = { "size", NULL };
+	PyObject *ret;
+	input_Stream_Object *self = (input_Stream_Object *)_self;
+	int size = -1;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i", discard_const_p(char *, kwnames), &size))
+		return NULL;
+	
+	/* Don't read beyond buffer boundaries */
+	if (size == -1)
+		size = self->web->input.partial.length-self->offset;
+	else
+		size = MIN(size, self->web->input.partial.length-self->offset);
+
+	ret = PyString_FromStringAndSize((char *)self->web->input.partial.data+self->offset, size);
+	self->offset += size;
+	
+	return ret;
+}
+
+static PyObject *py_input_readline(PyObject *_self)
+{
+	input_Stream_Object *self = (input_Stream_Object *)_self;
+	/* FIXME */
+	PyErr_SetString(PyExc_NotImplementedError, 
+			"readline() not yet implemented");
+	return NULL;
+}
+
+static PyObject *py_input_readlines(PyObject *_self, PyObject *args, PyObject *kwargs)
+{
+	const char *kwnames[] = { "hint", NULL };
+	PyObject *ret;
+	int hint;
+	input_Stream_Object *self = (input_Stream_Object *)_self;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i", discard_const_p(char *, kwnames), &hint))
+		return NULL;
+	
+	/* FIXME */
+	PyErr_SetString(PyExc_NotImplementedError, 
+			"readlines() not yet implemented");
+	return NULL;
+}
+
+static PyObject *py_input___iter__(PyObject *_self)
+{
+	input_Stream_Object *self = (input_Stream_Object *)_self;
+	/* FIXME */
+	PyErr_SetString(PyExc_NotImplementedError, 
+			"__iter__() not yet implemented");
+	return NULL;
+}
+
+static PyMethodDef input_Stream_methods[] = {
+	{ "read", (PyCFunction)py_input_read, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ "readline", (PyCFunction)py_input_readline, METH_NOARGS, NULL },
+	{ "readlines", (PyCFunction)py_input_readlines, METH_VARARGS|METH_KEYWORDS, NULL },
+	{ "__iter__", (PyCFunction)py_input___iter__, METH_NOARGS, NULL },
+	{ NULL, NULL, 0, NULL }
+};
+
+PyTypeObject input_Stream_Type = {
+	PyObject_HEAD_INIT(NULL) 0,
+	.tp_name = "wsgi.InputStream",
+	.tp_basicsize = sizeof(input_Stream_Object),
+	.tp_methods = input_Stream_methods,
+	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+};
+
+static PyObject *Py_InputHttpStream(struct websrv_context *web)
+{
+	input_Stream_Object *ret = PyObject_New(input_Stream_Object, &input_Stream_Type);
+	ret->web = web;
+	ret->offset = 0;
+	return (PyObject *)ret;
+}
+
+static PyObject *Py_ErrorHttpStream(void)
+{
+	error_Stream_Object *ret = PyObject_New(error_Stream_Object, &error_Stream_Type);
+	return (PyObject *)ret;
+}
+
+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)
+{
+	PyObject *env;
+	PyObject *errorstream;
+	PyObject *py_scheme;
+	struct http_header *hdr;
+	char *questionmark;
+	
+	env = PyDict_New();
+	if (env == NULL) {
+		return NULL;
+	}
+
+	errorstream = Py_ErrorHttpStream();
+	if (errorstream == NULL) {
+		Py_DECREF(env);
+		Py_DECREF(inputstream);
+		return NULL;
+	}
+
+	PyDict_SetItemString(env, "wsgi.input", inputstream);
+	PyDict_SetItemString(env, "wsgi.errors", errorstream);
+	PyDict_SetItemString(env, "wsgi.version", Py_BuildValue("(i,i)", 1, 0));
+	PyDict_SetItemString(env, "wsgi.multithread", Py_False);
+	PyDict_SetItemString(env, "wsgi.multiprocess", Py_True);
+	PyDict_SetItemString(env, "wsgi.run_once", Py_False);
+	PyDict_SetItemString(env, "SERVER_PROTOCOL", PyString_FromString("HTTP/1.0"));
+	if (content_length > 0) {
+		PyDict_SetItemString(env, "CONTENT_LENGTH", PyLong_FromLong(content_length));
+	}
+	PyDict_SetItemString(env, "REQUEST_METHOD", PyString_FromString(request_method));
+
+	questionmark = strchr(request_string, '?');
+	if (questionmark == NULL) {
+		PyDict_SetItemString(env, "SCRIPT_NAME", PyString_FromString(request_string));
+	} else {
+		PyDict_SetItemString(env, "QUERY_STRING", PyString_FromString(questionmark+1));
+		PyDict_SetItemString(env, "SCRIPT_NAME", PyString_FromStringAndSize(request_string, questionmark-request_string));
+	}
+	
+	PyDict_SetItemString(env, "SERVER_NAME", PyString_FromString(servername));
+	PyDict_SetItemString(env, "SERVER_PORT", PyInt_FromLong(serverport));
+	for (hdr = headers; hdr; hdr = hdr->next) {
+		char *name;
+		if (!strcasecmp(hdr->name, "Content-Type")) {
+			PyDict_SetItemString(env, "CONTENT_TYPE", PyString_FromString(hdr->value));
+		} else { 
+			asprintf(&name, "HTTP_%s", hdr->name);
+			PyDict_SetItemString(env, name, PyString_FromString(hdr->value));
+			free(name);
+		}
+	}
+
+	if (tls) {
+		py_scheme = PyString_FromString("https");
+	} else {
+		py_scheme = PyString_FromString("http");
+	}
+	PyDict_SetItemString(env, "wsgi.url_scheme", py_scheme);
+
+	return env;
+}
+
+static void wsgi_process_http_input(struct web_server_data *wdata,
+				    struct websrv_context *web)
+{
+	PyObject *py_environ, *result, *item, *iter;
+	PyObject *request_handler = wdata->private;
+	struct socket_address *socket_address;
+
+	web_request_Object *py_web = PyObject_New(web_request_Object, &web_request_Type);
+	py_web->web = web;
+
+	socket_address = socket_get_my_addr(web->conn->socket, web);
+	py_environ = create_environ(tls_enabled(web->conn->socket),
+				    web->input.content_length, 
+				    web->input.headers, 
+				    web->input.post_request?"POST":"GET",
+				    socket_address->addr,
+				    socket_address->port, 
+				    Py_InputHttpStream(web),
+				    web->input.url
+				    );
+	if (py_environ == NULL) {
+		DEBUG(0, ("Unable to create WSGI environment object\n"));
+		return;
+	}
+
+	result = PyObject_CallMethod(request_handler, discard_const_p(char, "__call__"), discard_const_p(char, "OO"),
+				       py_environ, PyObject_GetAttrString((PyObject *)py_web, "start_response"));
+
+	if (result == NULL) {
+		DEBUG(0, ("error while running WSGI code\n"));
+		return;
+	}
+
+	iter = PyObject_GetIter(result);
+	Py_DECREF(result);
+
+	/* Now, iter over all the data returned */
+
+	while ((item = PyIter_Next(iter))) {
+		websrv_output(web, PyString_AsString(item), PyString_Size(item));
+		Py_DECREF(item);
+	}
+
+	Py_DECREF(iter);
+}
+
+bool wsgi_initialize(struct web_server_data *wdata)
+{
+	PyObject *py_swat;
+
+	Py_Initialize();
+
+	if (PyType_Ready(&web_request_Type) < 0)
+		return false;
+
+	if (PyType_Ready(&input_Stream_Type) < 0)
+		return false;
+
+	if (PyType_Ready(&error_Stream_Type) < 0)
+		return false;
+
+	wdata->http_process_input = wsgi_process_http_input;
+	py_swat = PyImport_Import(PyString_FromString("swat"));
+	if (py_swat == NULL) {
+		DEBUG(0, ("Unable to find SWAT\n"));
+		return false;
+	}
+	wdata->private = py_swat;
+	return true;
+}