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-rw-r--r--net/httpserver.lua250
-rw-r--r--net/httpserver_listener.lua33
2 files changed, 283 insertions, 0 deletions
diff --git a/net/httpserver.lua b/net/httpserver.lua
new file mode 100644
index 00000000..3a3c34b4
--- /dev/null
+++ b/net/httpserver.lua
@@ -0,0 +1,250 @@
+
+local socket = require "socket"
+local server = require "net.server"
+local url_parse = require "socket.url".parse;
+
+local connlisteners_start = require "net.connlisteners".start;
+local connlisteners_get = require "net.connlisteners".get;
+local listener;
+
+local t_insert, t_concat = table.insert, table.concat;
+local s_match, s_gmatch = string.match, string.gmatch;
+local tonumber, tostring, pairs = tonumber, tostring, pairs;
+
+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("%%%x", c:byte()); end)); end
+
+local log = require "util.logger".init("httpserver");
+
+local http_servers = {};
+
+module "httpserver"
+
+local default_handler;
+
+local function expectbody(reqt)
+ return reqt.method == "POST";
+end
+
+local function send_response(request, response)
+ -- Write status line
+ local resp;
+ if response.body then
+ log("debug", "Sending response to %s: %s", request.id, response.body);
+ resp = { "HTTP/1.0 ", response.status or "200 OK", "\r\n"};
+ local h = response.headers;
+ if h then
+ for k, v in pairs(h) do
+ t_insert(resp, k);
+ t_insert(resp, ": ");
+ t_insert(resp, v);
+ t_insert(resp, "\r\n");
+ end
+ end
+ if response.body and not (h and h["Content-Length"]) then
+ t_insert(resp, "Content-Length: ");
+ t_insert(resp, #response.body);
+ t_insert(resp, "\r\n");
+ end
+ t_insert(resp, "\r\n");
+
+ if response.body and request.method ~= "HEAD" then
+ t_insert(resp, response.body);
+ end
+ else
+ -- Response we have is just a string (the body)
+ log("debug", "Sending response to %s: %s", request.id, response);
+
+ resp = { "HTTP/1.0 200 OK\r\n" };
+ t_insert(resp, "Connection: close\r\n");
+ t_insert(resp, "Content-Length: ");
+ t_insert(resp, #response);
+ t_insert(resp, "\r\n\r\n");
+
+ t_insert(resp, response);
+ end
+ request.write(t_concat(resp));
+ if not request.stayopen then
+ request:destroy();
+ end
+end
+
+local function call_callback(request, err)
+ if request.handled then return; end
+ request.handled = true;
+ local callback = request.callback;
+ if not callback and request.path then
+ local path = request.url.path;
+ local base = path:match("^/([^/?]+)");
+ if not base then
+ base = path:match("^http://[^/?]+/([^/?]+)");
+ end
+
+ callback = (request.server and request.server.handlers[base]) or default_handler;
+ if callback == default_handler then
+ log("debug", "Default callback for this request (base: "..tostring(base)..")")
+ end
+ end
+ if callback then
+ if err then
+ log("debug", "Request error: "..err);
+ if not callback(nil, err, request) then
+ destroy_request(request);
+ end
+ return;
+ end
+
+ local response = callback(request.method, request.body and t_concat(request.body), request);
+ if response then
+ if response == true then
+ -- Keep connection open, we will reply later
+ log("warn", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy));
+ else
+ -- Assume response
+ send_response(request, response);
+ destroy_request(request);
+ end
+ else
+ log("debug", "Request handler provided no response, destroying request...");
+ -- No response, close connection
+ destroy_request(request);
+ end
+ end
+end
+
+local function request_reader(request, data, startpos)
+ if not data then
+ if request.body then
+ call_callback(request);
+ else
+ -- Error.. connection was closed prematurely
+ call_callback(request, "connection-closed");
+ end
+ -- Here we force a destroy... the connection is gone, so we can't reply later
+ destroy_request(request);
+ return;
+ end
+ if request.state == "body" then
+ log("debug", "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
+ call_callback(request);
+ end
+ end
+ elseif request.state == "headers" then
+ log("debug", "Reading headers...")
+ local pos = startpos;
+ local headers = request.responseheaders or {};
+ for line in data:gmatch("(.-)\r\n") do
+ startpos = (startpos or 1) + #line + 2;
+ local k, v = line:match("(%S+): (.+)");
+ if k and v then
+ headers[k:lower()] = v;
+-- log("debug", "Header: "..k:lower().." = "..v);
+ elseif #line == 0 then
+ request.responseheaders = headers;
+ break;
+ else
+ log("debug", "Unhandled header line: "..line);
+ end
+ end
+
+ if not expectbody(request) then
+ call_callback(request);
+ return;
+ end
+
+ -- Reached the end of the headers
+ request.state = "body";
+ if #data > startpos then
+ return request_reader(request, data:sub(startpos, -1));
+ end
+ elseif request.state == "request" then
+ log("debug", "Reading request line...")
+ local method, path, http, linelen = data:match("^(%S+) (%S+) HTTP/(%S+)\r\n()", startpos);
+ if not method then
+ return call_callback(request, "invalid-status-line");
+ end
+
+ request.method, request.path, request.httpversion = method, path, http;
+
+ request.url = url_parse(request.path);
+
+ log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport());
+
+ if request.onlystatus then
+ if not call_callback(request) then
+ return;
+ end
+ end
+
+ request.state = "headers";
+
+ if #data > linelen then
+ return request_reader(request, data:sub(linelen, -1));
+ end
+ end
+end
+
+-- The default handler for requests
+default_handler = function (method, body, request)
+ log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport());
+ return { status = "404 Not Found",
+ headers = { ["Content-Type"] = "text/html" },
+ body = "<html><head><title>Page Not Found</title></head><body>Not here :(</body></html>" };
+end
+
+
+function new_request(handler)
+ return { handler = handler, conn = handler.socket,
+ write = handler.write, state = "request",
+ server = http_servers[handler.serverport()],
+ send = send_response,
+ destroy = destroy_request,
+ id = tostring{}:match("%x+$")
+ };
+end
+
+function destroy_request(request)
+ log("debug", "Destroying request %s", request.id);
+ listener = listener or connlisteners_get("httpserver");
+ if not request.destroyed then
+ request.destroyed = true;
+ if request.on_destroy then
+ log("debug", "Request has destroy callback");
+ request.on_destroy(request);
+ else
+ log("debug", "Request has no destroy callback");
+ end
+ request.handler.close()
+ if request.conn then
+ listener.disconnect(request.conn, "closed");
+ end
+ end
+end
+
+function new(params)
+ local http_server = http_servers[params.port];
+ if not http_server then
+ http_server = { handlers = {} };
+ http_servers[params.port] = http_server;
+ -- We weren't already listening on this port, so start now
+ connlisteners_start("httpserver", params);
+ end
+ if params.base then
+ http_server.handlers[params.base] = params.handler;
+ end
+end
+
+_M.request_reader = request_reader;
+_M.send_response = send_response;
+_M.urlencode = urlencode;
+
+return _M;
diff --git a/net/httpserver_listener.lua b/net/httpserver_listener.lua
new file mode 100644
index 00000000..f7fb7f4e
--- /dev/null
+++ b/net/httpserver_listener.lua
@@ -0,0 +1,33 @@
+
+
+local connlisteners_register = require "net.connlisteners".register;
+local new_request = require "net.httpserver".new_request;
+local request_reader = require "net.httpserver".request_reader;
+
+local requests = {}; -- Open requests
+
+local httpserver = { default_port = 80, default_mode = "*a" };
+
+function httpserver.listener(conn, data)
+ local request = requests[conn];
+
+ if not request then
+ request = new_request(conn);
+ requests[conn] = request;
+ end
+
+ if data then
+ request_reader(request, data);
+ end
+end
+
+function httpserver.disconnect(conn, err)
+ local request = requests[conn];
+ if request and not request.destroyed then
+ request.conn = nil;
+ request_reader(request, nil);
+ end
+ requests[conn] = nil;
+end
+
+connlisteners_register("httpserver", httpserver);