encode("zlib")でwsgiアプリをdeflate対応させる
strのメソッドencode()やdecode()では、"utf-8"などの文字コードだけじゃなく"base64"、"zlib"、"bz2"、"uu"、"hex"、"rot13"といったものもつかえるようです(/usr/lib/python2.6/encodings/以下にある)。でもなぜか"gzip"はありません。
encode("zlib")をつかって以下のようにすることで、wsgiアプリをdeflate対応にできます。
#!/usr/bin/env python # -*- coding: utf-8 mode: python -*- def application(env, start_response): status = "200 OK" headers = [("Content-Type", "text/html;charset=UTF-8")] deflate = "deflate" in env.get("HTTP_ACCEPT_ENCODING", "").split(",") content = "<html><body>" content += "Hello %s" % ("deflate" if deflate else "identity") content += "</body></html>" if deflate: headers.append(("Content-Encoding", "deflate")) content = content.encode("zlib") pass start_response(status, headers) return [content] if __name__ == "__main__": from wsgiref.handlers import CGIHandler CGIHandler().run(application) pass
decoratorにもできますね
def deflatable(app): def deflator(env, start_res): deflate = "deflate" in env.get("HTTP_ACCEPT_ENCODING", "").split(",") def start_wrapper(status, headers): headers.append(("Content-Encoding", "deflate")) return start_res(status, headers) contents = app(env, start_wrapper if deflate else start_res) return ["".join(contents).encode("zlib")] if deflate else contents return deflator @deflatable def application(env, start_response): ...
