# -*- coding: utf-8 -*-

from base import GroupTest
from requests import CurlRequest
from service import Service
import socket
import os
import base

SCGI_ENVCHECK="""#!/usr/bin/env python
# -*- coding: utf-8 -*-

import socket
import traceback

servsocket = socket.fromfd(0, socket.AF_UNIX, socket.SOCK_STREAM)

def parsereq(data):
	a = data.split(':', 1)
	if len(a) != 2: return False
	hlen, rem = a
	hlen = int(hlen)
	if hlen < 16: raise Exception("invalid request")
	if len(rem) < hlen + 1: return False
	if rem[hlen] != ',' or rem[hlen-1] != '\\0': raise Exception("invalid request")
	header = rem[:hlen-1]
	body = rem[hlen+1:]
	header = header.split('\\0')
	if len(header) < 4: raise Exception("invalid request: not enough header entries")
	if header[0] != "CONTENT_LENGTH": raise Exception("invalid request: missing CONTENT_LENGTH")
	clen = int(header[1])
	if len(body) < clen: return False
	env = dict()
	while len(header) > 0:
		if len(header) == 1: raise Exception("invalid request: missing value for key")
		key, value = header[0:2]
		header = header[2:]
		if '' == key: raise Exception("invalid request: empty key")
		if env.has_key(key): raise Exception("invalid request: duplicate key")
		env[key] = value
	if not env.has_key('SCGI') or env['SCGI'] != '1':
		raise Exception("invalid request: missing/broken SCGI=1 header")
	return {'env': env, 'body': body}

while 1:
	conn, addr = servsocket.accept()
	result_status = 200
	result = ''
	try:
		print 'Connected from', addr
		data = ''
		header = False
		while not header:
			newdata = conn.recv(1024)
			if len(newdata) == 0: raise Exception("invalid request: unexpected EOF")
			data += newdata
			header = parsereq(data)
		envvar = header['env']['QUERY_STRING']
		result = header['env'][envvar]
	except Exception as e:
		print traceback.format_exc()
		result_status = 500
		result = str(e)
	try:
		conn.sendall("Status: " + str(result_status) + "\\r\\nContent-Type: text/plain\\r\\n\\r\\n")
		conn.sendall(result)
		conn.close()
	except:
		print traceback.format_exc()

"""

class SCGI(Service):
	name = "scgi"
	binary = [ None ]

	def __init__(self):
		super(SCGI, self).__init__()
		self.sockfile = os.path.join(base.Env.dir, "tmp", "sockets", self.name + ".sock")

	def Prepare(self):
		sockdir = self.tests.PrepareDir(os.path.join("tmp", "sockets"))
		program = self.tests.PrepareFile('scgi-envcheck.py', SCGI_ENVCHECK, mode = 0755)
		sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
		sock.bind(os.path.relpath(self.sockfile))
		sock.listen(8)
		self.binary = [ program ]
		self.fork(*self.binary, inp = sock)

	def Cleanup(self):
		if None != self.sockfile:
			try:
				os.remove(self.sockfile)
			except BaseException, e:
				print >>sys.stderr, "Couldn't delete socket '%s': %s" % (self.sockfile, e)
		self.tests.CleanupDir(os.path.join("tmp", "sockets"))
		self.tests.CleanupFile('scgi-envcheck.py')


class TestPathInfo1(CurlRequest):
	URL = "/scgi/abc/xyz?PATH_INFO"
	EXPECT_RESPONSE_BODY = "/abc/xyz"
	EXPECT_RESPONSE_CODE = 200

class TestRequestUri1(CurlRequest):
	URL = "/scgi/abc/xyz?REQUEST_URI"
	EXPECT_RESPONSE_BODY = "/scgi/abc/xyz?REQUEST_URI"
	EXPECT_RESPONSE_CODE = 200

class Test(GroupTest):
	group = [
		TestPathInfo1,
		TestRequestUri1,
	]

	config = """
run_scgi;
"""

	def FeatureCheck(self):
		scgi = SCGI()
		self.plain_config = """
setup {{ module_load "mod_scgi"; }}

run_scgi = {{
	core.wsgi ( "/scgi", {{ scgi "unix:{socket}"; }} );
}};
""".format(socket = scgi.sockfile)

		self.tests.add_service(scgi)
		return True