Add gitano-command cgi

1 files changed, 91 insertions, 0 deletions

diff --git a/bin/gitano-command.cgi.in b/bin/gitano-command.cgi.in
new file mode 100755
index 0000000..bc280b2
--- /dev/null
+++ b/bin/gitano-command.cgi.in
@@ -0,0 +1,91 @@
+-- @@SHEBANG
+-- -*- Lua -*-
+-- command cgi
+--
+-- Git (with) Augmented network operations -- User authentication wrapper
+--
+-- Copyright 2014 Codethink Ltd
+--
+--
+
+-- @@GITANO_LUA_PATH
+
+local gitano = require "gitano"
+local gall = require "gall"
+local luxio = require "luxio"
+local sio = require "luxio.simple"
+
+-- @@GITANO_BIN_PATH
+-- @@GITANO_SHARE_PATH
+
+local stdout = sio.stdout
+
+function url_decode(str)
+  str = string.gsub (str, "+", " ")
+  str = string.gsub (str, "%%(%x%x)",
+      function(h) return string.char(tonumber(h,16)) end)
+  str = string.gsub (str, "\r\n", "\n")
+  return str
+end
+
+function run_command(cmd, cmdline, parsed_cmdline, user, config, env)
+   gitano.log.debug("Welcome to " .. config.global.site_name)
+   gitano.log.debug("Running:")
+   for i = 1, #parsed_cmdline do
+      gitano.log.debug(" => " .. parsed_cmdline[i])
+   end
+   gitano.log.debug("")
+   gitano.log.debug("On behalf of " .. user .. " using key " .. env["GITANO_KEYTAG"])
+
+   local how, why = cmd.run(config, repo, parsed_cmdline, env)
+
+   if how ~= "exit" or why ~= 0 then
+      gitano.log.critical("Error running " .. parsed_cmdline[1] .. ": " .. how)
+      return why
+   else
+      gitano.log.syslog.info(cmdline, "completed successfully")
+      return 0
+   end
+end
+
+if os.getenv("QUERY_STRING") then
+   local query_string = url_decode(os.getenv("QUERY_STRING"))
+   local cmdline = query_string
+
+   local _, e = string.find(query_string, "cmd=")
+
+   if not e then
+      stdout:write("Status: 400 Bad request\r\n\r\n")
+      stdout:write("Malformed command line, format: ?cmd=arg0 arg1 ... argn\n")
+      return
+   end
+
+   cmdline = string.sub(query_string, e + 1, #query_string)
+
+   if cmdline == '' then
+      stdout:write("Status: 400 Bad request\r\n\r\n")
+      stdout:write("Malformed command line, format: ?cmd=arg0 arg1 ... argn\n")
+      return
+   end
+
+   local user = os.getenv("REMOTE_USER") or "gitano/anonymous"
+
+   gitano.log.buffer_output()
+
+   local authorized, cmd, parsed_cmdline, config, env =
+      gitano.auth.is_authorized(user, "http", cmdline)
+
+   if authorized then
+      local exit = run_command(cmd, cmdline, parsed_cmdline, user, config, env)
+
+      stdout:write("Status: " .. (exit == 0 and "200 OK" or "400 Bad request")
+         .. "\r\n\r\n")
+      stdout:write(gitano.log.get_buffered_output() or "")
+   else
+      stdout:write("Status: 403 Forbidden\r\n\r\n")
+      stdout:write(gitano.log.get_buffered_output() or "")
+   end
+else
+   stdout:write("Status: 400 Bad request\r\n\r\n")
+   stdout:write("Malformed command line, format: ?cmd=arg0 arg1 ... argn\n")
+end