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from werkzeug.wrappers import Response

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from werkzeug.exceptions import (

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        HTTPException, 

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        BadRequest,         # 400

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        NotFound,           # 404

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)

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from werkzeug.utils import redirect

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import json as _json

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def html (tag, **opts) :

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    """

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        Return text/html response for given pvl.web.html

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    """

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    return Response(unicode(tag), mimetype='text/html', **opts)

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def json (data, **opts) :

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    """

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        Return text/json response for given object.

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    """

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    return Response(_json.dumps(data), mimetype='text/json', **opts)

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def image (file, type='png') :

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    """

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        Return image/{type} response for given file-like object.

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    """

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    # respond with file wrapper

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    return Response(file, mimetype='image/{type}'.format(type=type), direct_passthrough=True)        

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