6 files changed, 528 insertions, 1101 deletions

diff --git a/source4/web_server/config.mk b/source4/web_server/config.mk
index fe78687794..e034590111 100644
--- a/source4/web_server/config.mk
+++ b/source4/web_server/config.mk
@@ -4,11 +4,11 @@
 # Start SUBSYSTEM WEB
 [MODULE::WEB]
 INIT_FUNCTION = server_service_web_init
-SUBSYSTEM = smbd
-PRIVATE_DEPENDENCIES = ESP LIBTLS smbcalls process_model 
+SUBSYSTEM = samba
+PRIVATE_DEPENDENCIES = LIBTLS smbcalls process_model LIBPYTHON
 # End SUBSYSTEM WEB
 #######################
 
-WEB_OBJ_FILES = $(addprefix $(web_serversrcdir)/, web_server.o http.o)
+WEB_OBJ_FILES = $(addprefix $(web_serversrcdir)/, web_server.o wsgi.o) 
 
 $(eval $(call proto_header_template,$(web_serversrcdir)/proto.h,$(WEB_OBJ_FILES:.o=.c)))
diff --git a/source4/web_server/http.c b/source4/web_server/http.c
deleted file mode 100644
index bd6efa9262..0000000000
--- a/source4/web_server/http.c
+++ /dev/null
@@ -1,1030 +0,0 @@
-/* 
-   Unix SMB/CIFS implementation.
-
-   http handling code
-
-   Copyright (C) Andrew Tridgell 2005
-   
-   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 "smbd/service_task.h"
-#include "web_server/web_server.h"
-#include "smbd/service_stream.h"
-#include "smbd/service.h"
-#include "lib/events/events.h"
-#include "system/time.h"
-#include "system/wait.h"
-#include "lib/appweb/esp/esp.h"
-#include "lib/appweb/ejs/ejsInternal.h"
-#include "lib/util/dlinklist.h"
-#include "lib/tls/tls.h"
-#include "scripting/ejs/smbcalls.h"
-#include "param/param.h"
-
-#define SAMBA_SESSION_KEY "SambaSessionId"
-#define HTTP_PREAUTH_URI  "/scripting/preauth.esp"
-
-/* state of the esp subsystem for a specific request */
-struct esp_state {
-	struct websrv_context *web;
-	struct EspRequest *req;
-	struct MprVar variables[ESP_OBJ_MAX];
-	struct session_data *session;
-};
-
-/*
-  output the http headers
-*/
-static void http_output_headers(struct websrv_context *web)
-{
-	int i;
-	char *s;
-	DATA_BLOB b;
-	uint32_t content_length = 0;
-	const char *response_string = "Unknown Code";
-	const struct {
-		unsigned code;
-		const char *response_string;
-	} codes[] = {
-		{ 200, "OK" },
-		{ 301, "Moved" },
-		{ 302, "Found" },
-		{ 303, "Method" },
-		{ 304, "Not Modified" },
-		{ 400, "Bad request" },
-		{ 401, "Unauthorized" },
-		{ 403, "Forbidden" },
-		{ 404, "Not Found" },
-		{ 500, "Internal Server Error" },
-		{ 501, "Not implemented" }
-	};
-	for (i=0;i<ARRAY_SIZE(codes);i++) {
-		if (codes[i].code == web->output.response_code) {
-			response_string = codes[i].response_string;
-		}
-	}
-
-	if (web->output.headers == NULL) return;
-	s = talloc_asprintf(web, "HTTP/1.0 %u %s\r\n", 
-			    web->output.response_code, response_string);
-	if (s == NULL) return;
-	for (i=0;web->output.headers[i];i++) {
-		s = talloc_asprintf_append_buffer(s, "%s\r\n", web->output.headers[i]);
-	}
-
-	/* work out the content length */
-	content_length = web->output.content.length;
-	if (web->output.fd != -1) {
-		struct stat st;
-		fstat(web->output.fd, &st);
-		content_length += st.st_size;
-	}
-	s = talloc_asprintf_append_buffer(s, "Content-Length: %u\r\n\r\n", content_length);
-	if (s == NULL) return;
-
-	b = web->output.content;
-	web->output.content = data_blob_string_const(s);
-	data_blob_append(web, &web->output.content, b.data, b.length);
-	data_blob_free(&b);
-}
-
-/*
-  return the local path for a URL
-*/
-static const char *http_local_path(struct websrv_context *web,
-                                   const char *url,
-                                   const char *base_dir)
-{
-	int i;
-	char *path;
-
-	/* check that the url is OK */
-	if (url[0] != '/') return NULL;
-
-	for (i=0;url[i];i++) {
-		if ((!isalnum((unsigned char)url[i]) && !strchr("./_-", url[i])) ||
-		    (url[i] == '.' && strchr("/.", url[i+1]))) {
-			return NULL;
-		}
-	}
-
-	path = talloc_asprintf(web, "%s/%s", base_dir, url+1);
-	if (path == NULL) return NULL;
-
-	if (directory_exist(path)) {
-		path = talloc_asprintf_append_buffer(path, "/index.esp");
-	}
-	return path;
-}
-
-/*
-  called when esp wants to read a file to support include() calls
-*/
-static int http_readFile(EspHandle handle,
-                         char **buf,
-                         int *len,
-                         const char *path,
-                         const char *base_dir)
-{
-	struct websrv_context *web = talloc_get_type(handle, 
-						     struct websrv_context);
-	int fd = -1;
-	struct stat st;
-	*buf = NULL;
-
-	path = http_local_path(web, path, base_dir);
-	if (path == NULL) goto failed;
-
-	fd = open(path, O_RDONLY);
-	if (fd == -1 || fstat(fd, &st) != 0 || !S_ISREG(st.st_mode)) goto failed;
-
-	*buf = talloc_array(handle, char, st.st_size+1);
-	if (*buf == NULL) goto failed;
-
-	if (read(fd, *buf, st.st_size) != st.st_size) goto failed;
-
-	(*buf)[st.st_size] = 0;
-
-	close(fd);
-	*len = st.st_size;
-	return 0;
-
-failed:
-	DEBUG(0,("Failed to read file %s - %s\n", path, strerror(errno)));
-	if (fd != -1) close(fd);
-	talloc_free(*buf);
-	*buf = NULL;
-	return -1;
-}
-
-static int http_readFileFromSwatDir(EspHandle handle, char **buf, int *len,
-                                       const char *path)
-{
-    return http_readFile(handle, buf, len, path, 
-			 lp_swat_directory(global_loadparm));
-}
-
-
-
-/*
-  called when esp wants to find the real path of a file
-*/
-static int http_mapToStorage(EspHandle handle, char *path, int len, const char *uri, int flags)
-{
-	if (uri == NULL || strlen(uri) >= len) return -1;
-	strncpy(path, uri, len);
-	return 0;
-}
-
-/*
-  called when esp wants to output something
-*/
-static int http_writeBlock(EspHandle handle, const char *buf, int size)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	if (!data_blob_append(web, &web->output.content, buf, size))
-		return -1;
-	return size;
-}
-
-
-/*
-  set a http header
-*/
-static void http_setHeader(EspHandle handle, const char *value, bool allowMultiple)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	char *p = strchr(value, ':');
-
-	if (p && !allowMultiple && web->output.headers) {
-		int i;
-		for (i=0;web->output.headers[i];i++) {
-			if (strncmp(web->output.headers[i], value, (p+1)-value) == 0) {
-				web->output.headers[i] = talloc_strdup(web, value);
-				return;
-			}
-		}
-	}
-
-	web->output.headers = str_list_add(web->output.headers, value);
-	talloc_steal(web, web->output.headers);
-}
-
-/*
-  set a http response code
-*/
-static void http_setResponseCode(EspHandle handle, int code)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	web->output.response_code = code;
-}
-
-/*
-  redirect to another web page
- */
-static void http_redirect(EspHandle handle, int code, char *url)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	const char *host = web->input.host;
-	
-	/* form the full url, unless it already looks like a url */
-	if (strchr(url, ':') == NULL) {
-		if (host == NULL) {
-			struct socket_address *socket_address = socket_get_my_addr(web->conn->socket, web);
-			if (socket_address == NULL) goto internal_error;
-			host = talloc_asprintf(web, "%s:%u",
-					       socket_address->addr, socket_address->port);
-		}
-		if (host == NULL) goto internal_error;
-		if (url[0] != '/') {
-			char *p = strrchr(web->input.url, '/');
-			if (p == web->input.url) {
-				url = talloc_asprintf(web, "http%s://%s/%s", 
-						      tls_enabled(web->conn->socket)?"s":"",
-						      host, url);
-			} else {
-				int dirlen = p - web->input.url;
-				url = talloc_asprintf(web, "http%s://%s%*.*s/%s",
-						      tls_enabled(web->conn->socket)?"s":"",
-						      host, 
-						      dirlen, dirlen, web->input.url,
-						      url);
-			}
-			if (url == NULL) goto internal_error;
-		}
-	}
-
-	http_setHeader(handle, talloc_asprintf(web, "Location: %s", url), 0);
-
-	/* make sure we give a valid redirect code */
-	if (code >= 300 && code < 400) {
-		http_setResponseCode(handle, code);
-	} else {
-		http_setResponseCode(handle, 302);
-	}
-	return;
-
-internal_error:
-	http_error(web, 500, "Internal server error");
-}
-
-
-/*
-  setup a cookie
-*/
-static void http_setCookie(EspHandle handle, const char *name, const char *value, 
-			   int lifetime, const char *path, bool secure)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	char *buf;
-	
-	if (lifetime > 0) {
-		buf = talloc_asprintf(web, "Set-Cookie: %s=%s; path=%s; Expires=%s; %s",
-				      name, value, path?path:"/", 
-				      http_timestring(web, time(NULL)+lifetime),
-				      secure?"secure":"");
-	} else {
-		buf = talloc_asprintf(web, "Set-Cookie: %s=%s; path=%s; %s",
-				      name, value, path?path:"/", 
-				      secure?"secure":"");
-	}
-	http_setHeader(handle, "Cache-control: no-cache=\"set-cookie\"", 0);
-	http_setHeader(handle, buf, 0);
-	talloc_free(buf);
-}
-
-/*
-  return the session id
-*/
-static const char *http_getSessionId(EspHandle handle)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	return web->session->id;
-}
-
-/*
-  setup a session
-*/
-static void http_createSession(EspHandle handle, int timeout)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	if (web->session) {
-		web->session->lifetime = timeout;
-		http_setCookie(web, SAMBA_SESSION_KEY, web->session->id, 
-			       web->session->lifetime, "/", 0);
-	}
-}
-
-/*
-  destroy a session
-*/
-static void http_destroySession(EspHandle handle)
-{
-	struct websrv_context *web = talloc_get_type(handle, struct websrv_context);
-	talloc_free(web->session);
-	web->session = NULL;
-}
-
-
-/*
-  setup for a raw http level error
-*/
-void http_error(struct websrv_context *web, int code, const char *info)
-{
-	char *s;
-	s = talloc_asprintf(web,"<HTML><HEAD><TITLE>Error %u</TITLE></HEAD><BODY><H1>Error %u</H1><pre>%s</pre><p></BODY></HTML>\r\n\r\n", 
-			    code, code, info);
-	if (s == NULL) {
-		stream_terminate_connection(web->conn, "http_error: out of memory");
-		return;
-	}
-	http_writeBlock(web, s, strlen(s));
-	http_setResponseCode(web, code);
-	http_output_headers(web);
-	EVENT_FD_NOT_READABLE(web->conn->event.fde);
-	EVENT_FD_WRITEABLE(web->conn->event.fde);
-	web->output.output_pending = true;
-}
-
-/*
-  map a unix error code to a http error
-*/
-void http_error_unix(struct websrv_context *web, const char *info)
-{
-	int code = 500;
-	switch (errno) {
-	case ENOENT:
-	case EISDIR:
-		code = 404;
-		break;
-	case EACCES:
-		code = 403;
-		break;
-	}
-	info = talloc_asprintf(web, "%s<p>%s<p>\n", info, strerror(errno));
-	http_error(web, code, info);
-}
-
-
-/*
-  a simple file request
-*/
-static void http_simple_request(struct websrv_context *web)
-{
-	const char *url = web->input.url;
-	const char *path;
-	struct stat st;
-
-	path = http_local_path(web, url, lp_swat_directory(web->task->lp_ctx));
-	if (path == NULL) goto invalid;
-
-	/* looks ok */
-	web->output.fd = open(path, O_RDONLY);
-	if (web->output.fd == -1) {
-		DEBUG(0,("Failed to read file %s - %s\n", path, strerror(errno)));
-		http_error_unix(web, path);
-		return;
-	}
-
-	if (fstat(web->output.fd, &st) != 0 || !S_ISREG(st.st_mode)) {
-		close(web->output.fd);
-		goto invalid;
-	}
-
-	return;
-
-invalid:
-	http_error(web, 400, "Malformed URL");
-}
-
-/*
-  setup the standard ESP arrays
-*/
-static void http_setup_arrays(struct esp_state *esp)
-{
-	struct websrv_context *web = esp->web;
-	struct esp_data *edata = talloc_get_type(web->task->private, struct esp_data);
-	struct EspRequest *req = esp->req;
-	struct socket_address *socket_address = socket_get_my_addr(web->conn->socket, esp);
-	struct socket_address *peer_address = socket_get_peer_addr(web->conn->socket, esp);
-	char *p;
-
-#define SETVAR(type, name, value) do { \
-		const char *v = value; \
-		if (v) espSetStringVar(req, type, name, v); \
-} while (0)
-
-	SETVAR(ESP_REQUEST_OBJ, "CONTENT_LENGTH", 
-	       talloc_asprintf(esp, "%u", web->input.content_length));
-	SETVAR(ESP_REQUEST_OBJ, "QUERY_STRING", web->input.query_string);
-	SETVAR(ESP_REQUEST_OBJ, "POST_DATA",
-               talloc_strndup(esp,
-                              web->input.partial.data,
-                              web->input.partial.length));
-	SETVAR(ESP_REQUEST_OBJ, "REQUEST_METHOD", web->input.post_request?"POST":"GET");
-	SETVAR(ESP_REQUEST_OBJ, "REQUEST_URI", web->input.url);
-	p = strrchr(web->input.url, '/');
-	SETVAR(ESP_REQUEST_OBJ, "SCRIPT_NAME", p+1);
-	SETVAR(ESP_REQUEST_OBJ, "SCRIPT_FILENAME", web->input.url);
-	if (peer_address) {
-		struct MprVar mpv = mprObject("socket_address");
-		mprSetPtrChild(&mpv, "socket_address", peer_address);
-		espSetVar(req, ESP_REQUEST_OBJ, "REMOTE_SOCKET_ADDRESS", mpv);
-		SETVAR(ESP_REQUEST_OBJ, "REMOTE_ADDR", peer_address->addr);
-	}
-	p = socket_get_peer_name(web->conn->socket, esp);
-	SETVAR(ESP_REQUEST_OBJ, "REMOTE_HOST", p);
-	SETVAR(ESP_REQUEST_OBJ, "REMOTE_USER", "");
-	SETVAR(ESP_REQUEST_OBJ, "CONTENT_TYPE", web->input.content_type);
-	if (web->session) {
-		SETVAR(ESP_REQUEST_OBJ, "SESSION_ID", web->session->id);
-	}
-	SETVAR(ESP_REQUEST_OBJ, "COOKIE_SUPPORT", web->input.cookie?"true":"false");
-
-	SETVAR(ESP_HEADERS_OBJ, "HTTP_REFERER", web->input.referer);
-	SETVAR(ESP_HEADERS_OBJ, "HOST", web->input.host);
-	SETVAR(ESP_HEADERS_OBJ, "ACCEPT_ENCODING", web->input.accept_encoding);
-	SETVAR(ESP_HEADERS_OBJ, "ACCEPT_LANGUAGE", web->input.accept_language);
-	SETVAR(ESP_HEADERS_OBJ, "ACCEPT_CHARSET", web->input.accept_charset);
-	SETVAR(ESP_HEADERS_OBJ, "COOKIE", web->input.cookie);
-	SETVAR(ESP_HEADERS_OBJ, "USER_AGENT", web->input.user_agent);
-
-	if (socket_address) {
-		SETVAR(ESP_SERVER_OBJ, "SERVER_ADDR", socket_address->addr);
-		SETVAR(ESP_SERVER_OBJ, "SERVER_NAME", socket_address->addr);
-		SETVAR(ESP_SERVER_OBJ, "SERVER_HOST", socket_address->addr);
-		SETVAR(ESP_SERVER_OBJ, "SERVER_PORT", 
-		       talloc_asprintf(esp, "%u", socket_address->port));
-	}
-
-	SETVAR(ESP_SERVER_OBJ, "DOCUMENT_ROOT", lp_swat_directory(esp->web->task->lp_ctx));
-	SETVAR(ESP_SERVER_OBJ, "SERVER_PROTOCOL", tls_enabled(web->conn->socket)?"https":"http");
-	SETVAR(ESP_SERVER_OBJ, "SERVER_SOFTWARE", "SAMBA");
-	SETVAR(ESP_SERVER_OBJ, "GATEWAY_INTERFACE", "CGI/1.1");
-	SETVAR(ESP_SERVER_OBJ, "TLS_SUPPORT", tls_support(edata->tls_params)?"true":"false");
-}
-
-#if HAVE_SETJMP_H
-/* the esp scripting lirary generates exceptions when
-   it hits a major error. We need to catch these and
-   report a internal server error via http
-*/
-static jmp_buf ejs_exception_buf;
-static const char *exception_reason;
-
-static void web_server_ejs_exception(const char *reason)
-{
-	Ejs *ep = ejsPtr(0);
-	if (ep) {
-		ejsSetErrorMsg(0, "%s", reason);
-		exception_reason = ep->error;
-	} else {
-		exception_reason = reason;
-	}
-	DEBUG(0,("%s", exception_reason));
-	longjmp(ejs_exception_buf, -1);
-}
-#else
-static void web_server_ejs_exception(const char *reason)
-{
-	DEBUG(0,("%s", reason));
-	smb_panic(reason);
-}
-#endif
-
-/*
-  process a esp request
-*/
-static void esp_request(struct esp_state *esp, const char *url)
-{
-	struct websrv_context *web = esp->web;
-	int size;
-	int res;
-	char *emsg = NULL, *buf;
-
-	if (http_readFile(web, &buf, &size, url, lp_swat_directory(esp->web->task->lp_ctx)) != 0) {
-		http_error_unix(web, url);
-		return;
-	}
-
-#if HAVE_SETJMP_H
-	if (setjmp(ejs_exception_buf) != 0) {
-		http_error(web, 500, exception_reason);
-		return;
-	}
-#endif
-
-	res = espProcessRequest(esp->req, url, buf, &emsg);
-	if (res != 0 && emsg) {
-		http_writeBlock(web, "<pre>", 5);
-		http_writeBlock(web, emsg, strlen(emsg));
-		http_writeBlock(web, "</pre>", 6);
-	}
-	talloc_free(buf);
-}
-
-/*
-  perform pre-authentication on every page if /scripting/preauth.esp
-  exists.  If this script generates any non-whitepace output at all,
-  then we don't run the requested URL.
-
-  note that the preauth is run even for static pages such as images
-*/
-static bool http_preauth(struct esp_state *esp)
-{
-	const char *path = http_local_path(esp->web,
-                                           HTTP_PREAUTH_URI,
-                                           lp_swat_directory(esp->web->task->lp_ctx));
-	int i;
-	if (path == NULL) {
-		http_error(esp->web, 500, "Internal server error");
-		return false;
-	}
-	if (!file_exist(path)) {
-		/* if the preath script is not installed then allow access */
-		return true;
-	}
-	esp_request(esp, HTTP_PREAUTH_URI);
-	for (i=0;i<esp->web->output.content.length;i++) {
-		if (!isspace(esp->web->output.content.data[i])) {
-			/* if the preauth has generated content, then force it
-			   to be html, so that we can show the login page for
-			   failed access to images */
-			http_setHeader(esp->web, "Content-Type: text/html", 0);
-			return false;
-		}
-	}
-	data_blob_free(&esp->web->output.content);
-	return true;
-}
-
-
-/* 
-   handling of + and % escapes in http variables 
-*/
-static const char *http_unescape(TALLOC_CTX *mem_ctx, const char *p)
-{
-	char *s0 = talloc_strdup(mem_ctx, p);
-	char *s = s0;
-	if (s == NULL) return NULL;
-
-	while (*s) {
-		unsigned v;
-		if (*s == '+') *s = ' ';
-		if (*s == '%' && sscanf(s+1, "%02x", &v) == 1) {
-			*s = (char)v;
-			memmove(s+1, s+3, strlen(s+3)+1);
-		}
-		s++;
-	}
-
-	return s0;
-}
-
-/*
-  set a form or GET variable
-*/
-static void esp_putvar(struct esp_state *esp, const char *var, const char *value)
-{
-	if (strcasecmp(var, SAMBA_SESSION_KEY) == 0) {
-		/* special case support for browsers without cookie
-		 support */
-		esp->web->input.session_key = talloc_strdup(esp, value);
-	} else {
-		mprSetPropertyValue(&esp->variables[ESP_FORM_OBJ], 
-				    http_unescape(esp, var),
-				    mprCreateStringVar(http_unescape(esp, value), 0));
-	}
-}
-
-
-/*
-  parse the variables in a POST style request
-*/
-static NTSTATUS http_parse_post(struct esp_state *esp)
-{
-	DATA_BLOB b = esp->web->input.partial;
-
-	while (b.length) {
-		char *p, *line;
-		size_t len;
-
-		p = memchr(b.data, '&', b.length);
-		if (p == NULL) {
-			len = b.length;
-		} else {
-			len = p - (char *)b.data;
-		}
-		line = talloc_strndup(esp, (char *)b.data, len);
-		NT_STATUS_HAVE_NO_MEMORY(line);
-				     
-		p = strchr(line,'=');
-		if (p) {
-			*p = 0;
-			esp_putvar(esp, line, p+1);
-		}
-		talloc_free(line);
-		b.length -= len;
-		b.data += len;
-		if (b.length > 0) {
-			b.length--;
-			b.data++;
-		}
-	}
-
-	return NT_STATUS_OK;
-}
-
-/*
-  parse the variables in a GET style request
-*/
-static NTSTATUS http_parse_get(struct esp_state *esp)
-{
-	struct websrv_context *web = esp->web;
-	char *p, *s, *tok;
-	char *pp;
-
-	p = strchr(web->input.url, '?');
-	web->input.query_string = p+1;
-	*p = 0;
-
-	s = talloc_strdup(esp, esp->web->input.query_string);
-	NT_STATUS_HAVE_NO_MEMORY(s);
-
-	for (tok=strtok_r(s,"&;", &pp);tok;tok=strtok_r(NULL,"&;", &pp)) {
-		p = strchr(tok,'=');
-		if (p) {
-			*p = 0;
-			esp_putvar(esp, tok, p+1);
-		}
-	}
-	return NT_STATUS_OK;
-}
-
-/*
-  called when a session times out
-*/
-static void session_timeout(struct event_context *ev, struct timed_event *te, 
-			    struct timeval t, void *private)
-{
-	struct session_data *s = talloc_get_type(private, struct session_data);
-	talloc_free(s);
-}
-
-/*
-  destroy a session
- */
-static int session_destructor(struct session_data *s)
-{
-	DLIST_REMOVE(s->edata->sessions, s);
-	return 0;
-}
-
-/*
-  setup the session for this request
-*/
-static void http_setup_session(struct esp_state *esp)
-{
-	const char *session_key = SAMBA_SESSION_KEY;
-	char *p;
-	const char *cookie = esp->web->input.cookie;
-	const char *key = NULL;
-	struct esp_data *edata = talloc_get_type(esp->web->task->private, struct esp_data);
-	struct session_data *s;
-	bool generated_key = false;
-
-	/* look for our session key */
-	if (cookie && (p = strstr(cookie, session_key)) && 
-	    p[strlen(session_key)] == '=') {
-		p += strlen(session_key)+1;
-		key = talloc_strndup(esp, p, strcspn(p, ";"));
-	}
-
-	if (key == NULL && esp->web->input.session_key) {
-		key = esp->web->input.session_key;
-	} else if (key == NULL) {
-		key = generate_random_str_list(esp, 16, "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
-		generated_key = true;
-	}
-
-	/* try to find this session in the existing session list */
-	for (s=edata->sessions;s;s=s->next) {
-		if (strcmp(key, s->id) == 0) {
-			break;
-		}
-	}
-
-	if (s == NULL) {
-		/* create a new session */
-		s = talloc_zero(edata, struct session_data);
-		s->id = talloc_steal(s, key);
-		s->data = NULL;
-		s->te = NULL;
-		s->edata = edata;
-		s->lifetime = lp_parm_int(esp->web->task->lp_ctx, NULL, "web", "sessiontimeout", 900);
-		DLIST_ADD(edata->sessions, s);
-		talloc_set_destructor(s, session_destructor);
-		if (!generated_key) {
-			mprSetPropertyValue(&esp->variables[ESP_REQUEST_OBJ], 
-					    "SESSION_EXPIRED", mprCreateStringVar("true", 0));
-		}
-	}
-
-	http_setCookie(esp->web, session_key, key, s->lifetime, "/", 0);
-
-	if (s->data) {
-		mprCopyVar(&esp->variables[ESP_SESSION_OBJ], s->data, MPR_DEEP_COPY);
-	}
-
-	esp->web->session = s;
-}
-
-
-/* callbacks for esp processing */
-static const struct Esp esp_control = {
-	.maxScriptSize   = 60000,
-	.writeBlock      = http_writeBlock,
-	.setHeader       = http_setHeader,
-	.redirect        = http_redirect,
-	.setResponseCode = http_setResponseCode,
-	.readFile        = http_readFileFromSwatDir,
-	.mapToStorage    = http_mapToStorage,
-	.setCookie       = http_setCookie,
-	.createSession   = http_createSession,
-	.destroySession  = http_destroySession,
-	.getSessionId    = http_getSessionId
-};
-
-/*
-  process a complete http request
-*/
-void http_process_input(struct websrv_context *web)
-{
-	NTSTATUS status;
-	struct esp_state *esp = NULL;
-	struct esp_data *edata = talloc_get_type(web->task->private, struct esp_data);
-	struct smbcalls_context *smbcalls_ctx;
-	char *p;
-	void *save_mpr_ctx = mprMemCtx();
-	void *ejs_save = ejs_save_state();
-	int i;
-	const char *file_type = NULL;
-        enum page_type {
-                page_type_simple,
-                page_type_esp
-        };
-        enum page_type page_type;
-	const struct {
-		const char *extension;
-		const char *mime_type;
-                enum page_type page_type;
-	} mime_types[] = {
-		{"gif",  "image/gif"},
-		{"png",  "image/png"},
-		{"jpg",  "image/jpeg"},
-		{"txt",  "text/plain"},
-		{"ico",  "image/x-icon"},
-		{"css",  "text/css"},
-		{"esp",  "text/html", true}
-	};
-
-	/*
-	 * give the smbcalls a chance to find the event context
-	 * and messaging context 
-	 */
-	smbcalls_ctx = talloc(web, struct smbcalls_context);
-	if (smbcalls_ctx == NULL) goto internal_error;
-	smbcalls_ctx->event_ctx = web->conn->event.ctx;
-	smbcalls_ctx->msg_ctx = web->conn->msg_ctx;
-
-	esp = talloc_zero(smbcalls_ctx, struct esp_state);
-	if (esp == NULL) goto internal_error;
-
-	esp->web = web;
-
-	mprSetCtx(esp);
-
-	if (espOpen(&esp_control) != 0) goto internal_error;
-
-	for (i=0;i<ARRAY_SIZE(esp->variables);i++) {
-		esp->variables[i] = mprCreateUndefinedVar();
-	}
-	esp->variables[ESP_HEADERS_OBJ]     = mprCreateObjVar("headers", ESP_HASH_SIZE);
-	esp->variables[ESP_FORM_OBJ]        = mprCreateObjVar("form", ESP_HASH_SIZE);
-	esp->variables[ESP_APPLICATION_OBJ] = mprCreateObjVar("application", ESP_HASH_SIZE);
-	esp->variables[ESP_COOKIES_OBJ]     = mprCreateObjVar("cookies", ESP_HASH_SIZE);
-	esp->variables[ESP_FILES_OBJ]       = mprCreateObjVar("files", ESP_HASH_SIZE);
-	esp->variables[ESP_REQUEST_OBJ]     = mprCreateObjVar("request", ESP_HASH_SIZE);
-	esp->variables[ESP_SERVER_OBJ]      = mprCreateObjVar("server", ESP_HASH_SIZE);
-	esp->variables[ESP_SESSION_OBJ]     = mprCreateObjVar("session", ESP_HASH_SIZE);
-
-	if (edata->application_data) {
-		mprCopyVar(&esp->variables[ESP_APPLICATION_OBJ], 
-			   edata->application_data, MPR_DEEP_COPY);
-	}
-
-	smb_setup_ejs_functions(web_server_ejs_exception);
-
-	if (web->input.url == NULL) {
-		http_error(web, 400, "You must specify a GET or POST request");
-		mprSetCtx(save_mpr_ctx);
-		ejs_restore_state(ejs_save);
-		return;
-	}
-	
-	/* parse any form or get variables */
-	if (web->input.post_request) {
-		status = http_parse_post(esp);
-		if (!NT_STATUS_IS_OK(status)) {
-			http_error(web, 400, "Malformed POST data");
-			mprSetCtx(save_mpr_ctx);
-			ejs_restore_state(ejs_save);
-			return;
-		}
-	} 
-	if (strchr(web->input.url, '?')) {
-		status = http_parse_get(esp);
-		if (!NT_STATUS_IS_OK(status)) {
-			http_error(web, 400, "Malformed GET data");
-			mprSetCtx(save_mpr_ctx);
-			ejs_restore_state(ejs_save);
-			return;
-		}
-	}
-
-	http_setup_session(esp);
-
-	esp->req = espCreateRequest(web, web->input.url, esp->variables);
-	if (esp->req == NULL) goto internal_error;
-
-	p = strrchr(web->input.url, '.');
-	if (p == NULL) {
-		page_type = page_type_esp;
-		file_type = "text/html";
-	}
-	for (i=0;p && i<ARRAY_SIZE(mime_types);i++) {
-		if (strcmp(mime_types[i].extension, p+1) == 0) {
-			page_type = mime_types[i].page_type;
-			file_type = mime_types[i].mime_type;
-		}
-	}
-	if (file_type == NULL) {
-                page_type = page_type_simple;
-		file_type = "text/html";
-	}
-
-	/* setup basic headers */
-	http_setResponseCode(web, 200);
-	http_setHeader(web, talloc_asprintf(esp, "Date: %s", 
-					    http_timestring(esp, time(NULL))), 0);
-	http_setHeader(web, "Server: Samba", 0);
-	http_setHeader(web, "Connection: close", 0);
-	http_setHeader(web, talloc_asprintf(esp, "Content-Type: %s", file_type), 0);
-
-	http_setup_arrays(esp);
-
-	/*
-         * Do pre-authentication.  If pre-authentication succeeds, do
-         * page-type-specific processing.
-         */
-        switch(page_type)
-        {
-        case page_type_simple:
-                if (http_preauth(esp)) {
-                        http_simple_request(web);
-                }
-                break;
-
-        case page_type_esp:
-                if (http_preauth(esp)) {
-                        esp_request(esp, web->input.url);
-                }
-                break;
-        }
-
-	if (web->conn == NULL) {
-		/* the connection has been terminated above us, probably
-		   via a timeout */
-		goto internal_error;
-	}
-
-	if (!web->output.output_pending) {
-		http_output_headers(web);
-		EVENT_FD_WRITEABLE(web->conn->event.fde);
-		web->output.output_pending = true;
-	}
-
-	/* copy any application data to long term storage in edata */
-	talloc_free(edata->application_data);
-	edata->application_data = talloc_zero(edata, struct MprVar);
-	mprSetCtx(edata->application_data);
-	mprCopyVar(edata->application_data, &esp->variables[ESP_APPLICATION_OBJ], 
-		   MPR_DEEP_COPY);
-	mprSetCtx(esp);
-
-	/* copy any session data */
-	if (web->session) {
-		talloc_free(web->session->data);
-		web->session->data = talloc_zero(web->session, struct MprVar);
-		if (esp->variables[ESP_SESSION_OBJ].properties == NULL ||
-		    esp->variables[ESP_SESSION_OBJ].properties[0].numItems == 0) {
-			talloc_free(web->session);
-			web->session = NULL;
-		} else {
-			mprSetCtx(web->session->data);
-			mprCopyVar(web->session->data, &esp->variables[ESP_SESSION_OBJ], 
-				   MPR_DEEP_COPY);
-			/* setup the timeout for the session data */
-			mprSetCtx(esp);
-			talloc_free(web->session->te);
-			web->session->te = event_add_timed(web->conn->event.ctx, web->session, 
-							   timeval_current_ofs(web->session->lifetime, 0), 
-							   session_timeout, web->session);
-		}
-	}
-
-	talloc_free(esp);
-	mprSetCtx(save_mpr_ctx);
-	ejs_restore_state(ejs_save);
-	return;
-	
-internal_error:
-	mprSetCtx(esp);
-	talloc_free(esp);
-	if (web->conn != NULL) {
-		http_error(web, 500, "Internal server error");
-	}
-	mprSetCtx(save_mpr_ctx);
-	ejs_restore_state(ejs_save);
-}
-
-
-/*
-  parse one line of header input
-*/
-NTSTATUS http_parse_header(struct websrv_context *web, const char *line)
-{
-	if (line[0] == 0) {
-		web->input.end_of_headers = true;
-	} else if (strncasecmp(line,"GET ", 4)==0) {
-		web->input.url = talloc_strndup(web, &line[4], strcspn(&line[4], " \t"));
-	} else if (strncasecmp(line,"POST ", 5)==0) {
-		web->input.post_request = true;
-		web->input.url = talloc_strndup(web, &line[5], strcspn(&line[5], " \t"));
-	} else if (strchr(line, ':') == NULL) {
-		http_error(web, 400, "This server only accepts GET and POST requests");
-		return NT_STATUS_INVALID_PARAMETER;
-	} else if (strncasecmp(line,"Content-Length: ", 16)==0) {
-		web->input.content_length = strtoul(&line[16], NULL, 10);
-	} else {
-#define PULL_HEADER(v, s) do { \
-	if (strncmp(line, s, strlen(s)) == 0) { \
-		web->input.v = talloc_strdup(web, &line[strlen(s)]); \
-		return NT_STATUS_OK; \
-	} \
-} while (0)
-		PULL_HEADER(content_type, "Content-Type: ");
-		PULL_HEADER(user_agent, "User-Agent: ");
-		PULL_HEADER(referer, "Referer: ");
-		PULL_HEADER(host, "Host: ");
-		PULL_HEADER(accept_encoding, "Accept-Encoding: ");
-		PULL_HEADER(accept_language, "Accept-Language: ");
-		PULL_HEADER(accept_charset, "Accept-Charset: ");
-		PULL_HEADER(cookie, "Cookie: ");
-	}
-
-	/* ignore all other headers for now */
-	return NT_STATUS_OK;
-}
-
-
-/*
-  setup the esp processor - called at task initialisation
-*/
-NTSTATUS http_setup_esp(struct task_server *task)
-{
-	struct esp_data *edata;
-
-	edata = talloc_zero(task, struct esp_data);
-	NT_STATUS_HAVE_NO_MEMORY(edata);
-
-	task->private = edata;
-
-	edata->tls_params = tls_initialise(edata, task->lp_ctx);
-	NT_STATUS_HAVE_NO_MEMORY(edata->tls_params);
-
-	return NT_STATUS_OK;
-}
diff --git a/source4/web_server/swat/__init__.py b/source4/web_server/swat/__init__.py
index e0d85dbe2c..d434bb260b 100644
--- a/source4/web_server/swat/__init__.py
+++ b/source4/web_server/swat/__init__.py
@@ -1,4 +1,5 @@
 #!/usr/bin/python
+# -*- coding: utf-8 -*-
 
 # Unix SMB/CIFS implementation.
 # Copyright © Jelmer Vernooij <jelmer@samba.org> 2008
@@ -19,9 +20,20 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-def SWAT(environ, start_response):
+def __call__(environ, start_response):
     status = '200 OK'
-    response_headers = [('Content-type','text/plain')]
+    response_headers = [('Content-type','text/html')]
     start_response(status, response_headers)
-    return ['Hello world!\n']
+    yield '<table>\n'
 
+    for key, value in environ.items():
+        if isinstance(value, str):
+            yield '\t<tr><td><b>%s</b></td><td>%s</td></tr>\n' % (key, value)
+
+    yield '</table>\n'
+
+if __name__ == '__main__':
+    from wsgiref import simple_server
+    httpd = simple_server.make_server('localhost', 8090, __call__)
+    print "Serving HTTP on port 8090..."
+    httpd.serve_forever()
diff --git a/source4/web_server/web_server.c b/source4/web_server/web_server.c
index ac83a3384d..74eea9e60b 100644
--- a/source4/web_server/web_server.c
+++ b/source4/web_server/web_server.c
@@ -4,6 +4,7 @@
    web server startup
 
    Copyright (C) Andrew Tridgell 2005
+   Copyright (C) Jelmer Vernooij 2008
    
    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
@@ -29,6 +30,7 @@
 #include "system/network.h"
 #include "lib/socket/netif.h"
 #include "lib/tls/tls.h"
+#include "../lib/util/dlinklist.h"
 #include "param/param.h"
 
 /* don't allow connections to hang around forever */
@@ -39,9 +41,6 @@
 */
 static int websrv_destructor(struct websrv_context *web)
 {
-	if (web->output.fd != -1) {
-		close(web->output.fd);
-	}
 	return 0;
 }
 
@@ -62,10 +61,90 @@ static void websrv_timeout(struct event_context *event_context,
 }
 
 /*
+  setup for a raw http level error
+*/
+void http_error(struct websrv_context *web, const char *status, const char *info)
+{
+	char *s;
+	s = talloc_asprintf(web,"<HTML><HEAD><TITLE>Error %s</TITLE></HEAD><BODY><H1>Error %s</H1><pre>%s</pre><p></BODY></HTML>\r\n\r\n", 
+			    status, status, info);
+	if (s == NULL) {
+		stream_terminate_connection(web->conn, "http_error: out of memory");
+		return;
+	}
+	websrv_output_headers(web, status, NULL);
+	websrv_output(web, s, strlen(s));
+}
+
+void websrv_output_headers(struct websrv_context *web, const char *status, struct http_header *headers)
+{
+	char *s;
+	DATA_BLOB b;
+	struct http_header *hdr;
+
+	s = talloc_asprintf(web, "HTTP/1.0 %s\r\n", status);
+	if (s == NULL) return;
+	for (hdr = headers; hdr; hdr = hdr->next) {
+		s = talloc_asprintf_append_buffer(s, "%s: %s\r\n", hdr->name, hdr->value);
+	}
+
+	s = talloc_asprintf_append_buffer(s, "\r\n");
+
+	b = web->output.content;
+	web->output.content = data_blob_string_const(s);
+	websrv_output(web, b.data, b.length);
+	data_blob_free(&b);
+}
+
+void websrv_output(struct websrv_context *web, void *data, size_t length)
+{
+	data_blob_append(web, &web->output.content, data, length);
+	EVENT_FD_NOT_READABLE(web->conn->event.fde);
+	EVENT_FD_WRITEABLE(web->conn->event.fde);
+	web->output.output_pending = true;
+}
+
+
+/*
+  parse one line of header input
+*/
+NTSTATUS http_parse_header(struct websrv_context *web, const char *line)
+{
+	if (line[0] == 0) {
+		web->input.end_of_headers = true;
+	} else if (strncasecmp(line,"GET ", 4)==0) {
+		web->input.url = talloc_strndup(web, &line[4], strcspn(&line[4], " \t"));
+	} else if (strncasecmp(line,"POST ", 5)==0) {
+		web->input.post_request = true;
+		web->input.url = talloc_strndup(web, &line[5], strcspn(&line[5], " \t"));
+	} else if (strchr(line, ':') == NULL) {
+		http_error(web, "400 Bad request", "This server only accepts GET and POST requests");
+		return NT_STATUS_INVALID_PARAMETER;
+	} else if (strncasecmp(line, "Content-Length: ", 16)==0) {
+		web->input.content_length = strtoul(&line[16], NULL, 10);
+	} else {
+		struct http_header *hdr = talloc_zero(web, struct http_header);
+		char *colon = strchr(line, ':');
+		if (colon == NULL) {
+			http_error(web, "500 Internal Server Error", "invalidly formatted header");
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		hdr->name = talloc_strndup(hdr, line, colon-line);
+		hdr->value = talloc_strdup(hdr, colon+1);
+		DLIST_ADD(web->input.headers, hdr);
+	}
+
+	/* ignore all other headers for now */
+	return NT_STATUS_OK;
+}
+
+/*
   called when a web connection becomes readable
 */
 static void websrv_recv(struct stream_connection *conn, uint16_t flags)
 {
+	struct web_server_data *wdata;
 	struct websrv_context *web = talloc_get_type(conn->private, 
 						     struct websrv_context);
 	NTSTATUS status;
@@ -123,7 +202,9 @@ static void websrv_recv(struct stream_connection *conn, uint16_t flags)
 		 destroy the stack variables being used by that
 		 rendering process when we handle the timeout. */
 		if (!talloc_reference(web->task, web)) goto failed;
-		http_process_input(web);
+		wdata = talloc_get_type(web->task->private, struct web_server_data);
+		if (wdata == NULL) goto failed;
+		wdata->http_process_input(wdata, web);
 		talloc_unlink(web->task, web);
 	}
 	return;
@@ -133,6 +214,7 @@ failed:
 }
 
 
+
 /*
   called when a web connection becomes writable
 */
@@ -159,29 +241,7 @@ static void websrv_send(struct stream_connection *conn, uint16_t flags)
 
 	web->output.nsent += nsent;
 
-	/* possibly read some more raw data from a file */
-	if (web->output.content.length == web->output.nsent && 
-	    web->output.fd != -1) {
-		uint8_t buf[2048];
-		ssize_t nread;
-
-		data_blob_free(&web->output.content);
-		web->output.nsent = 0;
-
-		nread = read(web->output.fd, buf, sizeof(buf));
-		if (nread == -1 && errno == EINTR) {
-			return;
-		}
-		if (nread <= 0) {
-			close(web->output.fd);
-			web->output.fd = -1;
-			nread = 0;
-		}
-		web->output.content = data_blob_talloc(web, buf, nread);
-	}
-
-	if (web->output.content.length == web->output.nsent && 
-	    web->output.fd == -1) {
+	if (web->output.content.length == web->output.nsent) {
 		stream_terminate_connection(web->conn, "websrv_send: finished sending");
 	}
 }
@@ -192,7 +252,7 @@ static void websrv_send(struct stream_connection *conn, uint16_t flags)
 static void websrv_accept(struct stream_connection *conn)
 {
 	struct task_server *task = talloc_get_type(conn->private, struct task_server);
-	struct esp_data *edata = talloc_get_type(task->private, struct esp_data);
+	struct web_server_data *wdata = talloc_get_type(task->private, struct web_server_data);
 	struct websrv_context *web;
 	struct socket_context *tls_socket;
 
@@ -202,7 +262,6 @@ static void websrv_accept(struct stream_connection *conn)
 	web->task = task;
 	web->conn = conn;
 	conn->private = web;
-	web->output.fd = -1;
 	talloc_set_destructor(web, websrv_destructor);
 
 	event_add_timed(conn->event.ctx, web, 
@@ -210,7 +269,7 @@ static void websrv_accept(struct stream_connection *conn)
 			websrv_timeout, web);
 
 	/* Overwrite the socket with a (possibly) TLS socket */
-	tls_socket = tls_init_server(edata->tls_params, conn->socket, 
+	tls_socket = tls_init_server(wdata->tls_params, conn->socket, 
 				     conn->event.fde, "GPHO");
 	/* We might not have TLS, or it might not have initilised */
 	if (tls_socket) {
@@ -243,11 +302,12 @@ static void websrv_task_init(struct task_server *task)
 	NTSTATUS status;
 	uint16_t port = lp_web_port(task->lp_ctx);
 	const struct model_ops *model_ops;
+	struct web_server_data *wdata;
 
 	task_server_set_title(task, "task[websrv]");
 
 	/* run the web server as a single process */
-	model_ops = process_model_byname("single");
+	model_ops = process_model_startup(task->event_ctx, "single");
 	if (!model_ops) goto failed;
 
 	if (lp_interfaces(task->lp_ctx) && lp_bind_interfaces_only(task->lp_ctx)) {
@@ -280,8 +340,15 @@ static void websrv_task_init(struct task_server *task)
 
 	/* startup the esp processor - unfortunately we can't do this
 	   per connection as that wouldn't allow for session variables */
-	status = http_setup_esp(task);
-	if (!NT_STATUS_IS_OK(status)) goto failed;
+	wdata = talloc_zero(task, struct web_server_data);
+	if (wdata == NULL)goto failed;
+
+	task->private = wdata;
+	
+	wdata->tls_params = tls_initialise(wdata, task->lp_ctx);
+	if (wdata->tls_params == NULL) goto failed;
+
+	if (!wsgi_initialize(wdata)) goto failed;
 
 	return;
 
diff --git a/source4/web_server/web_server.h b/source4/web_server/web_server.h
index 52aff05dcc..f91c766494 100644
--- a/source4/web_server/web_server.h
+++ b/source4/web_server/web_server.h
@@ -19,13 +19,28 @@
 
 #include "smbd/process_model.h"
 
+struct websrv_context;
+
+struct web_server_data {
+	struct tls_params *tls_params;
+	void (*http_process_input)(struct web_server_data *wdata, 
+				   struct websrv_context *web);
+	void *private;	
+};
+
+struct http_header {
+	char *name;
+	char *value;
+	struct http_header *prev, *next;
+};
+
 /*
   context of one open web connection
 */
 struct websrv_context {
 	struct task_server *task;
 	struct stream_connection *conn;
-	struct {
+	struct websrv_request_input {
 		bool tls_detect;
 		bool tls_first_char;
 		uint8_t first_byte;
@@ -34,45 +49,17 @@ struct websrv_context {
 		char *url;
 		unsigned content_length;
 		bool post_request;
-		const char *content_type;
-		const char *query_string;
-		const char *user_agent;
-		const char *referer;
-		const char *host;
-		const char *accept_encoding;
-		const char *accept_language;
-		const char *accept_charset;
-		const char *cookie;
-		const char *session_key;
+		struct http_header *headers;
 	} input;
-	struct {
+	struct websrv_request_output {
 		bool output_pending;
 		DATA_BLOB content;
-		int fd;
+		bool headers_sent;
 		unsigned nsent;
-		int response_code;
-		const char **headers;
 	} output;
 	struct session_data *session;
 };
 
 
-/*
-  context for long term storage in the web server, to support session[]
-  and application[] data. Stored in task->private.
-*/
-struct esp_data {
-	struct session_data {
-		struct session_data *next, *prev;
-		struct esp_data *edata;
-		const char *id;
-		struct MprVar *data;
-		struct timed_event *te;
-		int lifetime;
-	} *sessions;
-	struct MprVar *application_data;
-	struct tls_params *tls_params;
-};
-
 #include "web_server/proto.h"
 
diff --git a/source4/web_server/wsgi.c b/source4/web_server/wsgi.c
new file mode 100644
index 0000000000..dcbb3c7fb6
--- /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;
+}