From c47be2e727d1bb3e2e3aa415ec96be2a5f8a45b7 Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Sun, 14 Jun 2009 08:51:43 +0000
Subject: GSoC: Documentation #2

---
 libs/lucid-http/luasrc/lucid/http.lua              |  3 +
 .../luasrc/lucid/http/DirectoryPublisher.lua       |  3 +
 .../luasrc/lucid/http/LuciWebPublisher.lua         |  4 ++
 libs/lucid-http/luasrc/lucid/http/Redirector.lua   |  4 +-
 .../luasrc/lucid/http/handler/catchall.lua         | 18 ++++++
 libs/lucid-http/luasrc/lucid/http/handler/file.lua | 23 +++++++-
 libs/lucid-http/luasrc/lucid/http/handler/luci.lua | 16 ++++++
 libs/lucid-http/luasrc/lucid/http/server.lua       | 66 +++++++++++++++++++---
 8 files changed, 127 insertions(+), 10 deletions(-)

(limited to 'libs/lucid-http')

diff --git a/libs/lucid-http/luasrc/lucid/http.lua b/libs/lucid-http/luasrc/lucid/http.lua
index 32ba5791d..931967c56 100644
--- a/libs/lucid-http/luasrc/lucid/http.lua
+++ b/libs/lucid-http/luasrc/lucid/http.lua
@@ -17,6 +17,9 @@ local srv = require "luci.lucid.http.server"
 
 module "luci.lucid.http"
 
+--- Prepare the HTTP-daemon and its associated publishers.
+-- @param publisher Table of publishers
+-- @return factory callback or nil, error message
 function factory(publisher)
 	local server = srv.Server()
 	for _, r in ipairs(publisher) do
diff --git a/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua b/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua
index f471781a9..b57b5586a 100644
--- a/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua
+++ b/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua
@@ -18,6 +18,9 @@ local srv = require "luci.lucid.http.server"
 module "luci.lucid.http.DirectoryPublisher"
 
 
+--- Prepare a directory publisher and assign it to a given Virtual Host.
+-- @param server HTTP daemon object
+-- @param config publisher configuration
 function factory(server, config)
 	config.domain = config.domain or ""
 	local vhost = server:get_vhosts()[config.domain] 
diff --git a/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua b/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua
index 0d0648967..f72b94f41 100644
--- a/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua
+++ b/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua
@@ -18,6 +18,10 @@ local srv = require "luci.lucid.http.server"
 
 module "luci.lucid.http.LuciWebPublisher"
 
+
+--- Prepare a LuCI web publisher and assign it to a given Virtual Host.
+-- @param server HTTP daemon object
+-- @param config publisher configuration
 function factory(server, config)
 	pcall(function()
 		require "luci.dispatcher"
diff --git a/libs/lucid-http/luasrc/lucid/http/Redirector.lua b/libs/lucid-http/luasrc/lucid/http/Redirector.lua
index c0af90b00..73561af2d 100644
--- a/libs/lucid-http/luasrc/lucid/http/Redirector.lua
+++ b/libs/lucid-http/luasrc/lucid/http/Redirector.lua
@@ -17,7 +17,9 @@ local srv = require "luci.lucid.http.server"
 
 module "luci.lucid.http.Redirector"
 
-
+--- Prepare a redirector publisher and assign it to a given Virtual Host.
+-- @param server HTTP daemon object
+-- @param config publisher configuration
 function factory(server, config)
 	config.domain = config.domain or ""
 	local vhost = server:get_vhosts()[config.domain] 
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua b/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua
index 3b2c2b0a0..30af84ba2 100644
--- a/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua
+++ b/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua
@@ -15,8 +15,15 @@ local srv = require "luci.lucid.http.server"
 local proto = require "luci.http.protocol"
 local util = require "luci.util"
 
+--- Catchall Handler
+-- @cstyle instance
 module "luci.lucid.http.handler.catchall"
 
+--- Create a Redirect handler.
+-- @param name Name
+-- @param target Redirect Target
+-- @class function
+-- @return Redirect handler object
 Redirect = util.class(srv.Handler)
 
 function Redirect.__init__(self, name, target)
@@ -24,6 +31,9 @@ function Redirect.__init__(self, name, target)
 	self.target = target
 end
 
+--- Handle a GET request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Redirect.handle_GET(self, request)
 	local target = self.target
 	local protocol = request.env.HTTPS and "https://" or "http://"
@@ -46,8 +56,16 @@ function Redirect.handle_GET(self, request)
 	return 302, { Location = target }
 end
 
+--- Handle a POST request.
+-- @class function
+-- @param request Request object
+-- @return status code, header table, response source
 Redirect.handle_POST = Redirect.handle_GET
 
+--- Handle a HEAD request.
+-- @class function
+-- @param request Request object
+-- @return status code, header table, response source
 function Redirect.handle_HEAD(self, request)
 	local stat, head = self:handle_GET(request)
 	return stat, head
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/file.lua b/libs/lucid-http/luasrc/lucid/http/handler/file.lua
index d08e47025..8f7bf8b8a 100644
--- a/libs/lucid-http/luasrc/lucid/http/handler/file.lua
+++ b/libs/lucid-http/luasrc/lucid/http/handler/file.lua
@@ -28,8 +28,16 @@ local date = require "luci.http.protocol.date"
 local mime = require "luci.http.protocol.mime"
 local cond = require "luci.http.protocol.conditionals"
 
+--- File system handler
+-- @cstyle instance
 module "luci.lucid.http.handler.file"
 
+--- Create a simple file system handler.
+-- @class function
+-- @param name Name
+-- @param docroot Physical Document Root
+-- @param options Options
+-- @return Simple file system handler object
 Simple = util.class(srv.Handler)
 
 function Simple.__init__(self, name, docroot, options)
@@ -42,6 +50,10 @@ function Simple.__init__(self, name, docroot, options)
 	self.error404 = options.error404
 end
 
+--- Parse a range request.
+-- @param request Request object
+-- @param size File size
+-- @return offset, length, range header or boolean status
 function Simple.parse_range(self, request, size)
 	if not request.headers.Range then
 		return true
@@ -75,6 +87,9 @@ function Simple.parse_range(self, request, size)
 	return from, (1 + to - from), range
 end
 
+--- Translate path and return file information.
+-- @param uri Request URI
+-- @return physical file path, file information
 function Simple.getfile(self, uri)
 	if not self.realdocroot then
 		self.realdocroot = fs.realpath(self.docroot)
@@ -86,6 +101,9 @@ function Simple.getfile(self, uri)
 	return file, fs.stat(file)
 end
 
+--- Handle a GET request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Simple.handle_GET(self, request)
 	local file, stat = self:getfile(prot.urldecode(request.env.PATH_INFO, true))
 
@@ -190,7 +208,7 @@ function Simple.handle_GET(self, request)
 					'p { margin:0 }'										..
 					'\n</style></head><body><h1>Index of %s/</h1><hr /><ul>'..
 					'<li><p><a href="%s/../">../</a> '						..
-					'<small>(parent directory)</small><br />'						..
+					'<small>(parent directory)</small><br />'				..
 					'<small></small></li>',
 					duri, duri, ruri 
 			)
@@ -244,6 +262,9 @@ function Simple.handle_GET(self, request)
 	end
 end
 
+--- Handle a HEAD request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Simple.handle_HEAD(self, ...)
 	local stat, head = self:handle_GET(...)
 	return stat, head
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/luci.lua b/libs/lucid-http/luasrc/lucid/http/handler/luci.lua
index c54e39366..d816aae13 100644
--- a/libs/lucid-http/luasrc/lucid/http/handler/luci.lua
+++ b/libs/lucid-http/luasrc/lucid/http/handler/luci.lua
@@ -19,8 +19,15 @@ local srv = require "luci.lucid.http.server"
 local coroutine = require "coroutine"
 local type = type
 
+--- LuCI web handler
+-- @cstyle instance
 module "luci.lucid.http.handler.luci"
 
+--- Create a LuCI web handler.
+-- @class function
+-- @param name Name
+-- @param prefix Dispatching prefix
+-- @return LuCI web handler object
 Luci = util.class(srv.Handler)
 
 function Luci.__init__(self, name, prefix)
@@ -28,15 +35,24 @@ function Luci.__init__(self, name, prefix)
 	self.prefix = prefix
 end
 
+--- Handle a HEAD request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Luci.handle_HEAD(self, ...)
 	local stat, head = self:handle_GET(...)
 	return stat, head
 end
 
+--- Handle a POST request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Luci.handle_POST(self, ...)
 	return self:handle_GET(...)
 end
 
+--- Handle a GET request.
+-- @param request Request object
+-- @return status code, header table, response source
 function Luci.handle_GET(self, request, sourcein)
 	local r = http.Request(
 		request.env,
diff --git a/libs/lucid-http/luasrc/lucid/http/server.lua b/libs/lucid-http/luasrc/lucid/http/server.lua
index 95484a02f..25f2535d9 100644
--- a/libs/lucid-http/luasrc/lucid/http/server.lua
+++ b/libs/lucid-http/luasrc/lucid/http/server.lua
@@ -23,6 +23,8 @@ local proto = require "luci.http.protocol"
 local table = require "table"
 local date = require "luci.http.protocol.date"
 
+--- HTTP Daemon
+-- @cstyle instance
 module "luci.lucid.http.server"
 
 VERSION = "1.0"
@@ -46,7 +48,11 @@ statusmsg = {
 	[503] = "Server Unavailable",
 }
 
--- File Resource
+--- Create a new IO resource response.
+-- @class function
+-- @param fd File descriptor
+-- @param len Length of data
+-- @return IO resource
 IOResource = util.class()
 
 function IOResource.__init__(self, fd, len)
@@ -54,19 +60,26 @@ function IOResource.__init__(self, fd, len)
 end
 
 
--- Server handler implementation
+--- Create a server handler.
+-- @class function
+-- @param name Name
+-- @return Handler
 Handler = util.class()
 
 function Handler.__init__(self, name)
 	self.name = name or tostring(self)
 end
 
--- Creates a failure reply
+--- Create a failure reply.
+-- @param code HTTP status code
+-- @param msg Status message
+-- @return status code, header table, response source
 function Handler.failure(self, code, msg)	
 	return code, { ["Content-Type"] = "text/plain" }, ltn12.source.string(msg)
 end
 
--- Access Restrictions
+--- Add an access restriction.
+-- @param restriction Restriction specification
 function Handler.restrict(self, restriction)
 	if not self.restrictions then
 		self.restrictions = {restriction}
@@ -75,7 +88,9 @@ function Handler.restrict(self, restriction)
 	end
 end
 
--- Check restrictions
+--- Enforce access restrictions.
+-- @param request Request object
+-- @return nil or HTTP statuscode, table of headers, response source
 function Handler.checkrestricted(self, request)
 	if not self.restrictions then
 		return
@@ -126,7 +141,10 @@ function Handler.checkrestricted(self, request)
 	}, ltn12.source.string("Unauthorized")
 end
 
--- Processes a request
+--- Process a request.
+-- @param request Request object
+-- @param sourcein Request data source
+-- @return HTTP statuscode, table of headers, response source
 function Handler.process(self, request, sourcein)
 	local stat, code, hdr, sourceout
 	
@@ -153,12 +171,19 @@ function Handler.process(self, request, sourcein)
 end
 
 
+--- Create a Virtual Host.
+-- @class function
+-- @return Virtual Host
 VHost = util.class()
 
 function VHost.__init__(self)
 	self.handlers = {}
 end
 
+--- Process a request and invoke the appropriate handler. 
+-- @param request Request object
+-- @param ... Additional parameters passed to the handler
+-- @return HTTP statuscode, table of headers, response source 
 function VHost.process(self, request, ...)
 	local handler
 	local hlen = -1
@@ -189,15 +214,20 @@ function VHost.process(self, request, ...)
 	end
 end
 
+--- Get a list of registered handlers.
+-- @return Table of handlers
 function VHost.get_handlers(self)
 	return self.handlers
 end
 
+--- Register handler with a given URI prefix.
+-- @oaram match URI prefix
+-- @param handler Handler object
 function VHost.set_handler(self, match, handler)
 	self.handlers[match] = handler
 end
 
-
+-- Remap IPv6-IPv4-compatibility addresses back to IPv4 addresses.
 local function remapipv6(adr)
 	local map = "::ffff:"
 	if adr:sub(1, #map) == map then
@@ -207,6 +237,7 @@ local function remapipv6(adr)
 	end 
 end
 
+-- Create a source that decodes chunked-encoded data from a socket.
 local function chunksource(sock, buffer)
 	buffer = buffer or ""
 	return function()
@@ -250,6 +281,7 @@ local function chunksource(sock, buffer)
 	end
 end
 
+-- Create a sink that chunk-encodes data and writes it on a given socket.
 local function chunksink(sock)
 	return function(chunk, err)
 		if not chunk then
@@ -260,20 +292,33 @@ local function chunksink(sock)
 	end
 end
 
+
+--- Create a server object.
+-- @class function
+-- @return Server object
 Server = util.class()
 
 function Server.__init__(self)
 	self.vhosts = {}
 end
 
+--- Get a list of registered virtual hosts.
+-- @return Table of virtual hosts
 function Server.get_vhosts(self)
 	return self.vhosts
 end
 
+--- Register a virtual host with a given name.
+-- @param name Hostname
+-- @param vhost Virtual host object
 function Server.set_vhost(self, name, vhost)
 	self.vhosts[name] = vhost
 end
 
+--- Send a fatal error message to given client and close the connection.
+-- @param client Client socket
+-- @param code HTTP status code
+-- @param msg status message
 function Server.error(self, client, code, msg)
 	hcode = tostring(code)
 	
@@ -304,6 +349,9 @@ local hdr2env = {
 	["User-Agent"] = "HTTP_USER_AGENT"
 }
 
+--- Parse the request headers and prepare the environment.
+-- @param source line-based input source
+-- @return Request object
 function Server.parse_headers(self, source)
 	local env = {}
 	local req = {env = env, headers = {}}
@@ -348,7 +396,9 @@ function Server.parse_headers(self, source)
 	return req
 end
 
-
+--- Handle a new client connection.
+-- @param client client socket
+-- @param env superserver environment
 function Server.process(self, client, env)
 	local sourcein  = function() end
 	local sourcehdr = client:linesource()
-- 
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