web.py 文件源码

def transform_first_chunk(self, headers, chunk, finishing):
        if self._gzipping:
            ctype = _unicode(headers.get("Content-Type", "")).split(";")[0]
            self._gzipping = (ctype in self.CONTENT_TYPES) and \
                (not finishing or len(chunk) >= self.MIN_LENGTH) and \
                (finishing or "Content-Length" not in headers) and \
                ("Content-Encoding" not in headers)
        if self._gzipping:
            headers["Content-Encoding"] = "gzip"
            self._gzip_value = BytesIO()
            self._gzip_file = gzip.GzipFile(mode="w", fileobj=self._gzip_value)
            chunk = self.transform_chunk(chunk, finishing)
            if "Content-Length" in headers:
                headers["Content-Length"] = str(len(chunk))
        return headers, chunk