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+# Migrating between rspamd version
+
+This document describes incompatible changes introduced in the recent rspamd 
+versions. Here you can find information about how to overcome this incompatibilities
+and update your rules and configuration according to these changes.
+
+## Migrating from rspamd 0.6 to rspamd 0.7
+
+### Webui changes
+
+Rspamd web interface is now a part of distribution. Moreover, all static files
+are now served by rspamd itself so you won't need to setup additional web server
+to distribute static files. At the same time, webui worker is now removed and
+the controller acts as webui+old_controller allowing to work with both web browser
+and rspamc client. However, one might still want to setup a full-featured HTTP
+server before rspamd to enable, for example TLS and access controls. 
+
+Now there are two password levels for rspamd: `password` for read-only commands
+and `enable_password` for data changing commands. If `enable_password` is not
+specified then `password` is used for both commands.
+
+Here is an example of the full configuration of rspamd controller worker to
+serve webui:
+
+~~~nginx
+worker {
+	type = "controller";
+	bind_socket = "localhost:11334";
+	count = 1;
+	password = "q1";
+	enable_password = "q2";
+	secure_ip = "127.0.0.1"; # Allows to use *all* commands from this IP
+	static_dir = "${WWWDIR}";
+}
+~~~
+
+### Lua changes
+
+There are many changes in lua API and some of them are unfortunately breaking ones.
+
+* many superglobals are removed: now rspamd modules need to be loaded explicitly,
+the only global remaining is `rspamd_config`. This affects the following modules:
+	- `rspamd_logger`
+	- `rspamd_ip`
+	- `rspamd_http`
+	- `rspamd_cdb`
+	- `rspamd_regexp`
+	- `rspamd_trie`
+	
+~~~lua
+local rspamd_logger = require "rspamd_logger"
+local rspamd_trie = require "rspamd_trie"
+local rspamd_cdb = require "rspamd_cdb"
+local rspamd_ip = require "rspamd_ip"
+local rspamd_regexp = require "rspamd_regexp"
+~~~
+
+* new system of symbols registration: now symbols can be registered by adding
+new indices to `rspamd_config` object. Old version:
+
+~~~lua
+local reconf = config['regexp']
+reconf['SYMBOL'] = function(task)
+...
+end
+~~~
+
+new one:
+
+~~~lua
+rspamd_config.SYMBOL = function(task)
+...
+end
+~~~
+
+`rspamd_message` is **removed** completely, you should use task methods to
+access message's data. This includes such methods as:
+
+* `get_date` - now this method can return date for task and message based on the arguments:
+
+~~~lua
+local dm = task:get_date{format = 'message'} -- MIME message date
+local dt = task:get_date{format = 'connect'} -- check date
+~~~
+	
+* `get_header` - this function is now totally reworked. Now `get_header` version
+returns just a decoded string, `get_header_raw` returns undecoded string and
+`get_header_full` returns the full list of tables. Please consult with the
+corresponding [documentation](https://rspamd.com/doc/lua/task.html) for details.
+You also might want to correct old invocation of task:get_header to new one.
+Old version:
+
+~~~lua
+function kmail_msgid (task)
+	local msg = task:get_message()
+	local header_msgid = msg:get_header('Message-Id')
+	if header_msgid then
+		-- header_from and header_msgid are tables
+		for _,header_from in ipairs(msg:get_header('From')) do
+	    	...
+		end
+	end
+	return false
+end
+~~~
+	
+new one:
+
+~~~lua
+function kmail_msgid (task)
+	local header_msgid = task:get_header('Message-Id')
+	if header_msgid then
+		local header_from = task:get_header('From')
+		-- header_from and header_msgid are strings
+	end
+	return false
+end
+~~~
+
+or with the full version:
+	
+~~~lua
+rspamd_config.FORGED_GENERIC_RECEIVED5 = function (task)
+	local headers_recv = task:get_header_full('Received')
+	if headers_recv then
+		-- headers_recv is now the list of tables
+		for _,header_r in ipairs(headers_recv) do
+			if re:match(header_r['value']) then
+				return true
+			end
+		end
+	end
+    return false
+end
+~~~
+
+* `get_from` and `get_recipients` now accepts optional numeric argument that
+specifies where to get a sender and recipients for a message. By default this
+argument is `0` which means that data is initially checked in SMTP envelope
+(meaning `MAIL FROM` and `RCPT TO` SMTP commands) and if envelope data is
+unaccessible then it is grabbed from MIME headers. Value `1` means that data
+is checked on envelope only, whilst `2` switches mode to MIME headers. Here is
+an example from `forged_recipients` module:
+
+~~~lua
+-- Check sender
+local smtp_from = task:get_from(1)
+if smtp_from then
+	local mime_from = task:get_from(2)
+	if not mime_from or 
+			not (string.lower(mime_from[1]['addr']) == 
+			string.lower(smtp_from[1]['addr'])) then
+		task:insert_result(symbol_sender, 1)
+	end
+end
+~~~
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