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mod_bosh: Support for cross-domain access control using CORS
authorMatthew Wild <mwild1@gmail.com>
Thu, 21 Jan 2010 15:07:52 +0000 (15:07 +0000)
committerMatthew Wild <mwild1@gmail.com>
Thu, 21 Jan 2010 15:07:52 +0000 (15:07 +0000)
plugins/mod_bosh.lua patch | blob | history

diff --git a/plugins/mod_bosh.lua b/plugins/mod_bosh.lua
index 76009bb431f4a59626a062f6ba4b513630f4347c..21bfbebf6afdf8c1217dea1844a02409c195b5e9 100644 (file)
--- a/plugins/mod_bosh.lua
+++ b/plugins/mod_bosh.lua
@@ -34,6 +34,23 @@ local BOSH_DEFAULT_MAXPAUSE = tonumber(module:get_option("bosh_max_pause")) or 3
 local default_headers = { ["Content-Type"] = "text/xml; charset=utf-8" };
 local session_close_reply = { headers = default_headers, body = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate" }), attr = {} };
 
+local http_options, http_denied_options = { headers = {} }, { headers = {} };
+local cross_domain = module:get_option("cross_domain_bosh");
+if cross_domain ~= false then
+       http_options.headers["Access-Control-Allow-Methods"] = "GET, POST, OPTIONS";
+       http_options.headers["Access-Control-Allow-Headers"] = "Content-Type";
+       http_options.headers["Access-Control-Max-Age"] = "86400";
+
+       if cross_domain == true then
+               http_options.headers["Access-Control-Allow-Origin"] = "*";
+       elseif type(cross_domain) == "table" then
+               cross_domain = table.concat(cross_domain, ", ");
+       end
+       if type(cross_domain) == "string" then
+               http_options.headers["Access-Control-Allow-Origin"] = cross_domain;
+       end
+end
+
 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
 local os_time = os.time;
 
@@ -59,9 +76,25 @@ function on_destroy_request(request)
        end
 end
 
+local function send_options_headers(request)
+       if cross_domain == nil then
+               local host = request.headers.host and request.headers.host:match("^[^:]+");
+               if hosts[host] then
+                       http_options.headers["Access-Control-Allow-Origin"] = "http://"..host;
+               else
+                       return http_denied_options; -- We don't want to reveal the hosts we serve
+               end
+       end
+       return http_options;
+end
+
 function handle_request(method, body, request)
        if (not body) or request.method ~= "POST" then
-               return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
+               if request.method == "OPTIONS" then
+                       return send_options_headers(request);
+               else
+                       return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
+               end
        end
        if not method then
                log("debug", "Request %s suffered error %s", tostring(request.id), body);