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prosody
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net/http.lua @ 971:dd736391bd41
Merge
author | Matthew Wild <mwild1@gmail.com> |
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date | Wed, 08 Apr 2009 23:20:45 +0100 |
parent | 923:c63f9bc45a85 |
child | 1037:cb5fdce8dcec |
child | 1111:a1cf1d623695 |
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local socket = require "socket" local mime = require "mime" local url = require "socket.url" 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 tonumber, tostring, pairs, xpcall, select, debug_traceback = tonumber, tostring, pairs, xpcall, select, debug.traceback; local log = require "util.logger".init("http"); local print = function () end local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end module "http" local function expectbody(reqt, code) if reqt.method == "HEAD" then return nil end if code == 204 or code == 304 then return nil end if code >= 100 and code < 200 then return nil end return 1 end local function request_reader(request, data, startpos) if not data then if request.body then log("debug", "Connection closed, but we have data, calling callback..."); request.callback(t_concat(request.body), request.code, request); elseif request.state ~= "completed" then -- Error.. connection was closed prematurely request.callback("connection-closed", 0, request); end destroy_request(request); request.body = nil; request.state = "completed"; return; end if request.state == "body" and request.state ~= "completed" then print("Reading body...") if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end if startpos then data = data:sub(startpos, -1) end t_insert(request.body, data); if request.bodylength then request.havebodylength = request.havebodylength + #data; if request.havebodylength >= request.bodylength then -- We have the body log("debug", "Have full body, calling callback"); if request.callback then request.callback(t_concat(request.body), request.code, request); end request.body = nil; request.state = "completed"; else print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength); end end elseif request.state == "headers" then print("Reading headers...") local pos = startpos; local headers = request.responseheaders or {}; for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do startpos = startpos + #line + 2; local k, v = line:match("(%S+): (.+)"); if k and v then headers[k:lower()] = v; print("Header: "..k:lower().." = "..v); elseif #line == 0 then request.responseheaders = headers; break; else print("Unhandled header line: "..line); end end -- Reached the end of the headers request.state = "body"; if #data > startpos then return request_reader(request, data, startpos); end elseif request.state == "status" then print("Reading status...") local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos); code = tonumber(code); if not code then return request.callback("invalid-status-line", 0, request); end request.code, request.responseversion = code, http; if request.onlystatus or not expectbody(request, code) then if request.callback then request.callback(nil, code, request); end destroy_request(request); return; end request.state = "headers"; if #data > linelen then return request_reader(request, data, linelen); end end 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 = req.handler.write; 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.handler.close() listener.disconnect(request.conn, "closed"); end end _M.urlencode = urlencode; return _M;