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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 mime = require "mime"
local url = require "socket.url"
local httpstream_new = require "util.httpstream".new;
local server = require "net.server"
local connlisteners_get = require "net.connlisteners".get;
local listener = connlisteners_get("httpclient") or error("No httpclient listener!");
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"
function urlencode(s) return s and (s:gsub("%W", 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 = {};
for _, field in ipairs(form) do
t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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
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);
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 custom_headers, body;
local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
if req.userinfo then
default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
end
if ex then
custom_headers = ex.headers;
req.onlystatus = ex.onlystatus;
body = ex.body;
if body then
req.method = "POST ";
default_headers["Content-Length"] = tostring(#body);
default_headers["Content-Type"] = "application/x-www-form-urlencoded";
end
if ex.method then req.method = ex.method; end
end
req.handler, req.conn = server.wrapclient(socket.tcp(), req.host, req.port or 80, listener, "*a");
req.write = function (...) return req.handler:write(...); end
req.conn:settimeout(0);
local ok, err = req.conn:connect(req.host, req.port or 80);
if not ok and err ~= "timeout" then
callback(nil, 0, req);
return nil, err;
end
local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
if req.query then
t_insert(request_line, 4, "?");
t_insert(request_line, 5, req.query);
end
req.write(t_concat(request_line));
local t = { [2] = ": ", [4] = "\r\n" };
if custom_headers then
for k, v in pairs(custom_headers) do
t[1], t[3] = k, v;
req.write(t_concat(t));
default_headers[k] = nil;
end
end
for k, v in pairs(default_headers) do
t[1], t[3] = k, v;
req.write(t_concat(t));
default_headers[k] = nil;
end
req.write("\r\n");
if body then
req.write(body);
end
req.callback = function (content, code, request) log("debug", "Calling callback, status %s", code or "---"); return select(2, xpcall(function () return callback(content, code, request) end, handleerr)); end
req.reader = request_reader;
req.state = "status";
listener.register_request(req.handler, req);
return req;
end
function destroy_request(request)
if request.conn then
request.conn = nil;
request.handler:close()
listener.ondisconnect(request.handler, "closed");
end
end
_M.urlencode = urlencode;
return _M;
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