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|
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local socket = require "socket"
local b64 = require "util.encodings".base64.encode;
local url = require "socket.url"
local httpstream_new = require "util.httpstream".new;
local server = require "net.server"
local t_insert, t_concat = table.insert, table.concat;
local pairs, ipairs = pairs, ipairs;
local tonumber, tostring, xpcall, select, debug_traceback, char, format =
tonumber, tostring, xpcall, select, debug.traceback, string.char, string.format;
local log = require "util.logger".init("http");
module "http"
local requests = {}; -- Open requests
local listener = { default_port = 80, default_mode = "*a" };
function listener.onconnect(conn)
local req = requests[conn];
-- Send the request
local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
if req.query then
t_insert(request_line, 4, "?"..req.query);
end
conn:write(t_concat(request_line));
local t = { [2] = ": ", [4] = "\r\n" };
for k, v in pairs(req.headers) do
t[1], t[3] = k, v;
conn:write(t_concat(t));
end
conn:write("\r\n");
if req.body then
conn:write(req.body);
end
end
function listener.onincoming(conn, data)
local request = requests[conn];
if not request then
log("warn", "Received response from connection %s with no request attached!", tostring(conn));
return;
end
if data and request.reader then
request:reader(data);
end
end
function listener.ondisconnect(conn, err)
local request = requests[conn];
if request and request.conn then
request:reader(nil);
end
requests[conn] = nil;
end
function urlencode(s) return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end)); end
function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); end
local function _formencodepart(s)
return s and (s:gsub("%W", function (c)
if c ~= " " then
return format("%%%02x", c:byte());
else
return "+";
end
end));
end
function formencode(form)
local result = {};
if form[1] then -- Array of ordered { name, value }
for _, field in ipairs(form) do
t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
end
else -- Unordered map of name -> value
for name, value in pairs(form) do
t_insert(result, _formencodepart(name).."=".._formencodepart(value));
end
end
return t_concat(result, "&");
end
function formdecode(s)
if not s:match("=") then return urldecode(s); end
local r = {};
for k, v in s:gmatch("([^=&]*)=([^&]*)") do
k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
k, v = urldecode(k), urldecode(v);
t_insert(r, { name = k, value = v });
r[k] = v;
end
return r;
end
local function request_reader(request, data, startpos)
if not request.parser then
if not data then return; end
local function success_cb(r)
if request.callback then
for k,v in pairs(r) do request[k] = v; end
request.callback(r.body, r.code, request, r);
request.callback = nil;
end
destroy_request(request);
end
local function error_cb(r)
if request.callback then
request.callback(r or "connection-closed", 0, request);
request.callback = nil;
end
destroy_request(request);
end
local function options_cb()
return request;
end
request.parser = httpstream_new(success_cb, error_cb, "client", options_cb);
end
request.parser:feed(data);
end
local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
function request(u, ex, callback)
local req = url.parse(u);
if not (req and req.host) then
callback(nil, 0, req);
return nil, "invalid-url";
end
if not req.path then
req.path = "/";
end
local method, headers, body;
headers = {
["Host"] = req.host;
["User-Agent"] = "Prosody XMPP Server";
};
if req.userinfo then
headers["Authorization"] = "Basic "..b64(req.userinfo);
end
if ex then
req.onlystatus = ex.onlystatus;
body = ex.body;
if body then
method = "POST";
headers["Content-Length"] = tostring(#body);
headers["Content-Type"] = "application/x-www-form-urlencoded";
end
if ex.method then method = ex.method; end
if ex.headers then
for k, v in pairs(ex.headers) do
headers[k] = v;
end
end
end
-- Attach to request object
req.method, req.headers, req.body = method, headers, body;
local using_https = req.scheme == "https";
local port = tonumber(req.port) or (using_https and 443 or 80);
-- Connect the socket, and wrap it with net.server
local conn = socket.tcp();
conn:settimeout(10);
local ok, err = conn:connect(req.host, port);
if not ok and err ~= "timeout" then
callback(nil, 0, req);
return nil, err;
end
req.handler, req.conn = server.wrapclient(conn, req.host, port, listener, "*a", using_https and { mode = "client", protocol = "sslv23" });
req.write = function (...) return req.handler:write(...); end
req.callback = function (content, code, request, response) log("debug", "Calling callback, status %s", code or "---"); return select(2, xpcall(function () return callback(content, code, request, response) end, handleerr)); end
req.reader = request_reader;
req.state = "status";
requests[req.handler] = req;
return req;
end
function destroy_request(request)
if request.conn then
request.conn = nil;
request.handler:close()
end
end
_M.urlencode = urlencode;
return _M;
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