File

net/http.lua @ 11405:ce8291e89d67

mod_http_file_share: Remove correct entries when not all expired files were deleted If any of the expired files could not be deleted then we should not forget about that, we should complain loudly and try again. The code got this backwards and would have removed only the entries referring to still existing files. Test procedure: 1. Upload a file 2. chown root:root http_file_share/ 3. In uploads.list, decrease 'when' enough to ensure expiry 4. Reload mod_http_file_share 5. Should see an error in the logs about failure to delete the file 6. Should see that the metadata in uploads.list is still there 7. chown http_file_share/ back to the previous owner 8. Reload mod_http_file_share 9. Should see logs about successful removal of expired file 10. Should see that the metadata in uploads.list is gone 11. Should see that the file was deleted
author Kim Alvefur <zash@zash.se>
date Thu, 25 Feb 2021 23:58:08 +0100
parent 11220:9b25eecde9e6
child 11661:735b8f4a6d7e
line wrap: on
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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 b64 = require "util.encodings".base64.encode;
local url = require "socket.url"
local httpstream_new = require "net.http.parser".new;
local util_http = require "util.http";
local events = require "util.events";
local verify_identity = require"util.x509".verify_identity;
local promise = require "util.promise";
local http_errors = require "net.http.errors";

local basic_resolver = require "net.resolvers.basic";
local connect = require "net.connect".connect;

local ssl_available = pcall(require, "ssl");

local t_insert, t_concat = table.insert, table.concat;
local pairs = pairs;
local tonumber, tostring, traceback =
      tonumber, tostring, debug.traceback;
local os_time = os.time;
local xpcall = require "util.xpcall".xpcall;
local error = error

local log = require "util.logger".init("http");

local _ENV = nil;
-- luacheck: std none

local requests = {}; -- Open requests

local function make_id(req) return (tostring(req):match("%x+$")); end

local listener = { default_port = 80, default_mode = "*a" };

-- Request-related helper functions
local function handleerr(err) log("error", "Traceback[http]: %s", traceback(tostring(err), 2)); return err; end
local function log_if_failed(req, ret, ...)
	if not ret then
		log("error", "Request '%s': error in callback: %s", req.id, (...));
		if not req.suppress_errors then
			error(...);
		end
	end
	return ...;
end

local function destroy_request(request)
	local conn = request.conn;
	if conn then
		request.conn = nil;
		conn:close()
	end
end

local function cancel_request(request, reason)
	if request.callback then
		request.callback(reason or "cancelled", 0, request);
		request.callback = nil;
	end
	if request.conn then
		destroy_request(request);
	end
end

local function request_reader(request, data, err)
	if not request.parser then
		local function error_cb(reason)
			if request.callback then
				request.callback(reason or "connection-closed", 0, request);
				request.callback = nil;
			end
			destroy_request(request);
		end

		if not data then
			error_cb(err);
			return;
		end

		local finalize_sink;
		local function success_cb(r)
			if r.partial then
				-- Request should be streamed
				log("debug", "Request '%s': partial response (%s%s)",
					request.id,
					r.chunked and "chunked, " or "",
					r.body_length and ("%d bytes"):format(r.body_length) or "unknown length"
				);
				if request.streaming_handler then
					log("debug", "Request '%s': Streaming via handler");
					r.body_sink, finalize_sink = request.streaming_handler(r);
				end
				return;
			elseif finalize_sink then
				log("debug", "Request '%s': Finalizing response stream");
				finalize_sink(r);
			end
			if request.callback then
				request.callback(r.body, r.code, r, 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

-- Connection listener callbacks
function listener.onconnect(conn)
	local req = requests[conn];

	-- Initialize request object
	req.write = function (...) return req.conn:write(...); end
	local callback = req.callback;
	req.callback = function (content, code, response, request)
		do
			local event = { http = req.http, url = req.url, request = req, response = response, content = content, code = code, callback = req.callback };
			req.http.events.fire_event("response", event);
			content, code, response = event.content, event.code, event.response;
		end

		log("debug", "Request '%s': Calling callback, status %s", req.id, code or "---");
		return log_if_failed(req.id, xpcall(callback, handleerr, content, code, response, request));
	end
	req.reader = request_reader;
	req.state = "status";
	req.cancel = cancel_request;

	requests[req.conn] = req;

	-- Validate certificate
	if not req.insecure and conn:ssl() then
		local sock = conn:socket();
		local chain_valid = sock.getpeerverification and sock:getpeerverification();
		if not chain_valid then
			req.callback("certificate-chain-invalid", 0, req);
			req.callback = nil;
			conn:close();
			return;
		end
		local cert = sock.getpeercertificate and sock:getpeercertificate();
		if not cert or not verify_identity(req.host, false, cert) then
			req.callback("certificate-verify-failed", 0, req);
			req.callback = nil;
			conn:close();
			return;
		end
	end

	-- 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!", 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, err or "closed");
	end
	requests[conn] = nil;
end

function listener.onattach(conn, req)
	requests[conn] = req;
	req.conn = conn;
end

function listener.ondetach(conn)
	requests[conn] = nil;
end

function listener.onfail(req, reason)
	req.http.events.fire_event("request-connection-error", { http = req.http, request = req, url = req.url, err = reason });
	req.callback(reason or "connection failed", 0, req);
end

local function request(self, u, ex, callback)
	local req = url.parse(u);

	if not (req and req.host) then
		callback("invalid-url", 0, req);
		return nil, "invalid-url";
	end

	req.url = u;
	req.http = self;
	req.time = os_time();

	if not req.path then
		req.path = "/";
	end

	req.id = ex and ex.id or make_id(req);

	do
		local event = { http = self, url = u, request = req, options = ex, callback = callback };
		local ret = self.events.fire_event("pre-request", event);
		if ret then
			return ret;
		end
		req, u, ex, req.callback = event.request, event.url, event.options, event.callback;
	end

	local method, headers, body;

	local host, port = req.host, req.port;
	local host_header = host;
	if (port == "80" and req.scheme == "http")
	or (port == "443" and req.scheme == "https") then
		port = nil;
	elseif port then
		host_header = host_header..":"..port;
	end

	headers = {
		["Host"] = host_header;
		["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
		req.insecure = ex.insecure;
		req.suppress_errors = ex.suppress_errors;
		req.streaming_handler = ex.streaming_handler;
	end

	log("debug", "Making %s %s request '%s' to %s", req.scheme:upper(), method or "GET", req.id, (ex and ex.suppress_url and host_header) or u);

	-- Attach to request object
	req.method, req.headers, req.body = method, headers, body;

	local using_https = req.scheme == "https";
	if using_https and not ssl_available then
		error("SSL not available, unable to contact https URL");
	end
	local port_number = port and tonumber(port) or (using_https and 443 or 80);

	local sslctx = false;
	if using_https then
		sslctx = ex and ex.sslctx or self.options and self.options.sslctx;
	end

	local http_service = basic_resolver.new(host, port_number, "tcp", { servername = req.host });
	connect(http_service, listener, { sslctx = sslctx }, req);

	self.events.fire_event("request", { http = self, request = req, url = u });
	return req;
end

local function new(options)
	local http = {
		options = options;
		request = function (self, u, ex, callback)
			if callback ~= nil then
				return request(self, u, ex, callback);
			else
				return promise.new(function (resolve, reject)
					request(self, u, ex, function (body, code, a, b)
						if code == 0 then
							reject(http_errors.new(body, { request = a }));
						else
							a.request = b;
							resolve(a);
						end
					end);
				end);
			end
		end;
		new = options and function (new_options)
			local final_options = {};
			for k, v in pairs(options) do final_options[k] = v; end
			if new_options then
				for k, v in pairs(new_options) do final_options[k] = v; end
			end
			return new(final_options);
		end or new;
		events = events.new();
	};
	return http;
end

local default_http = new({
	sslctx = { mode = "client", protocol = "sslv23", options = { "no_sslv2", "no_sslv3" }, alpn = "http/1.1" };
	suppress_errors = true;
});

return {
	request = function (u, ex, callback)
		return default_http:request(u, ex, callback);
	end;
	default = default_http;
	new = new;
	events = default_http.events;
	-- COMPAT
	urlencode = util_http.urlencode;
	urldecode = util_http.urldecode;
	formencode = util_http.formencode;
	formdecode = util_http.formdecode;
	destroy_request = destroy_request;
	features = {
		sni = true;
	};
};