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--[[
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" and pr ~= "https" then
return nil, -2, "protocol not supported"
end
port = #port > 0 and port or (pr == "https" and "443" 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)
if pr == "https" then
local tls = options.tls_context or nixio.tls()
sock = tls:create(sock)
local stat, code, error = sock:connect()
if not stat then
return stat, code, error
end
end
-- 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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