More nixio fixes, initial httpclient

1 files changed, 217 insertions, 0 deletions

diff --git a/libs/httpclient/luasrc/httpclient.lua b/libs/httpclient/luasrc/httpclient.lua
new file mode 100644
index 0000000000..6681f82aaf
--- /dev/null
+++ b/libs/httpclient/luasrc/httpclient.lua
@@ -0,0 +1,217 @@
+--[[
+LuCI - Lua Configuration Interface
+
+Copyright 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+require "nixio.util"
+local nixio = require "nixio"
+
+local ltn12 = require "luci.ltn12"
+local util = require "luci.util"
+local table = require "table"
+local http = require "luci.http.protocol"
+
+local type, pairs, tonumber, print = type, pairs, tonumber, print
+
+module "luci.httpclient"
+
+function chunksource(sock, buffer)
+	buffer = buffer or ""
+	return function()
+		local output
+		local _, endp, count = buffer:find("^([0-9a-fA-F]+);?.-\r\n")
+		while not count and #buffer <= 1024 do
+			local newblock, code = sock:recv(1024 - #buffer)
+			if not newblock then
+				return nil, code
+			end
+			buffer = buffer .. newblock  
+			_, endp, count = buffer:find("^([0-9a-fA-F]+);?.-\r\n")
+		end
+		count = tonumber(count, 16)
+		if not count then
+			return nil, -1, "invalid encoding"
+		elseif count == 0 then
+			return nil
+		elseif count + 2 <= #buffer - endp then
+			output = buffer:sub(endp+1, endp+count)
+			buffer = buffer:sub(endp+count+3)
+			return output
+		else
+			output = buffer:sub(endp+1, endp+count)
+			buffer = ""
+			if count - #output > 0 then
+				local remain, code = sock:recvall(count-#output)
+				if not remain then
+					return nil, code
+				end
+				output = output .. remain
+				count, code = sock:recvall(2)
+			else
+				count, code = sock:recvall(count+2-#buffer+endp)
+			end
+			if not count then
+				return nil, code
+			end
+			return output
+		end
+	end
+end
+
+
+function request_to_buffer(uri, options)
+	local source, code, msg = request_to_source(uri, options)
+	local output = {}
+	
+	if not source then
+		return nil, code, msg
+	end
+	
+	source, code = ltn12.pump.all(source, (ltn12.sink.table(output)))
+	
+	if not source then
+		return nil, code
+	end
+	
+	return table.concat(output)
+end
+
+function request_to_source(uri, options)
+	local status, response, buffer, sock = request_raw(uri, options)
+	if not status then
+		return status, response, buffer
+	elseif status ~= 200 and status ~= 206 then
+		return nil, status, response
+	end
+	
+	if response["Transfer-Encoding"] == "chunked" then
+		return chunksource(sock, buffer)
+	else
+		return ltn12.source.cat(ltn12.source.string(buffer), sock:blocksource())
+	end
+end
+
+--
+-- GET HTTP-resource
+--
+function request_raw(uri, options)
+	options = options or {}
+	local pr, host, port, path = uri:match("(%w+)://([%w-.]+):?([0-9]*)(.*)")
+	if not host then
+		return nil, -1, "unable to parse URI"
+	end
+	
+	if pr ~= "http" then
+		return nil, -2, "protocol not supported"
+	end
+	
+	port = #port > 0 and port or "80"
+	path = #path > 0 and path or "/"
+	
+	options.depth = options.depth or 10
+	local headers = options.headers or {}
+	local protocol = options.protocol or "HTTP/1.1"
+	local method  = options.method or "GET"
+	headers["User-Agent"] = headers["User-Agent"] or "LuCI httpclient 0.1"
+	
+	if headers.Connection == nil then
+		headers.Connection = "close"
+	end
+	
+	local sock, code, msg = nixio.connect(host, port)
+	if not sock then
+		return nil, code, msg
+	end
+	
+	sock:setsockopt("socket", "sndtimeo", options.sndtimeo or 15)
+	sock:setsockopt("socket", "rcvtimeo", options.rcvtimeo or 15)
+	
+	-- Pre assemble fixes	
+	if protocol == "HTTP/1.1" then
+		headers.Host = headers.Host or host
+	end
+	
+	if type(options.body) == "table" then
+		options.body = http.urlencode_params(options.body)
+		headers["Content-Type"] = headers["Content-Type"] or 
+			"application/x-www-form-urlencoded"
+	end
+
+	if type(options.body) == "string" then
+		headers["Content-Length"] = headers["Content-Length"] or #options.body
+	end
+	
+	-- Assemble message
+	local message = {method .. " " .. path .. " " .. protocol}
+	
+	for k, v in pairs(headers) do
+		if v then
+			message[#message+1] = k .. ": " .. v
+		end
+	end
+	message[#message+1] = ""
+	message[#message+1] = ""
+	
+	-- Send request
+	sock:sendall(table.concat(message, "\r\n"))
+	
+	if type(options.body) == "string" then
+		sock:sendall(options.body)
+	end
+	
+	-- Create source and fetch response
+	local linesrc = sock:linesource()
+	local line, code, error = linesrc()
+	
+	if not line then
+		return nil, code, error
+	end
+	
+	local protocol, status, msg = line:match("^(HTTP/[0-9.]+) ([0-9]+) (.*)")
+	
+	if not protocol then
+		return nil, -3, "invalid response magic: " .. line
+	end
+	
+	local response = {Status=line}
+	
+	line = linesrc()
+	while line and line ~= "" do
+		local key, val = line:match("^([%w-]+)%s?:%s?(.*)")
+		if key and key ~= "Status" then
+			response[key] = val
+		end
+		line = linesrc()
+	end
+	
+	if not line then
+		return nil, -4, "protocol error"
+	end
+	
+	-- Follow 
+	local code = tonumber(status)
+	if code and options.depth > 0 then
+		if code == 301 or code == 302 or code == 307 and response.Location then
+			local nexturi = response.Location
+			if not nexturi:find("https?://") then
+				nexturi = pr .. "://" .. host .. ":" .. port .. nexturi
+			end
+			
+			options.depth = options.depth - 1
+			sock:close()
+			
+			return request_raw(nexturi, options)
+		end
+	end
+	
+	return code, response, linesrc(true), sock
+end
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