[flashproxy/js] Python 2.4–compatible sha1 import.

[dcf at torproject.org]

commit bb9a328ffe0d8234ef6157585b9bee1d63e6107f
Author: David Fifield <david at bamsoftware.com>
Date:   Sun Apr 8 20:31:02 2012 -0700

    Python 2.4–compatible sha1 import.
---
 connector.py |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/connector.py b/connector.py
index d000a54..dad0071 100755
--- a/connector.py
+++ b/connector.py
@@ -4,7 +4,6 @@ import array
 import base64
 import cStringIO
 import getopt
-import hashlib
 import httplib
 import os
 import re
@@ -19,6 +18,12 @@ import urllib
 import xml.sax.saxutils
 import BaseHTTPServer
 
+try:
+    from hashlib import sha1
+except ImportError:
+    # Python 2.4 uses this name.
+    from sha import sha as sha1
+
 DEFAULT_REMOTE_ADDRESS = "0.0.0.0"
 DEFAULT_REMOTE_PORT = 9000
 DEFAULT_LOCAL_ADDRESS = "127.0.0.1"
@@ -502,7 +507,7 @@ def handle_websocket_request(fd):
     # 4.2.2, with the string "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", taking the
     # SHA-1 hash of this concatenated value to obtain a 20-byte value and
     # base64-encoding (see Section 4 of [RFC4648]) this 20-byte hash.
-    accept_key = base64.b64encode(hashlib.sha1(key + MAGIC_GUID).digest())
+    accept_key = base64.b64encode(sha1(key + MAGIC_GUID).digest())
     handler.send_header("Sec-WebSocket-Accept", accept_key)
     # 5.  Optionally, a |Sec-WebSocket-Protocol| header field, with a value
     # /subprotocol/ as defined in step 4 in Section 4.2.2.