utils.py 文件源码

def get_aws_metadata(headers, provider=None):
    if not provider:
        provider = boto.provider.get_default()
    metadata_prefix = provider.metadata_prefix
    metadata = {}
    for hkey in headers.keys():
        if hkey.lower().startswith(metadata_prefix):
            val = urllib.parse.unquote(headers[hkey])
            if isinstance(val, bytes):
                try:
                    val = val.decode('utf-8')
                except UnicodeDecodeError:
                    # Just leave the value as-is
                    pass
            metadata[hkey[len(metadata_prefix):]] = val
            del headers[hkey]
    return metadata