Pluto/util.py

import json

def header_dumps(hdr):
    return '\n'.join('%s: %s'%(k, v) for k, v in hdr.items())

def header_loads(hdr):
    d = {}
    for line in hdr.split('\n'):
        k, _, v = line.partition(': ')
        if _:
            d[k] = v
    return d

def jloads(s):
    try:
        return json.loads(s)
    except (ValueError, TypeError):
        return s

def jdumps(obj):
    try:
        return json.dumps(obj)
    except (ValueError, TypeError):
        return obj

def checkbox(request, name):
    return (True if request.values.get(name, 0, int) else False)

def safe_load(tpn, rowid):
    import model
    try:
        return getattr(model, tpn).get_one(rowid=rowid)
    except (AttributeError, model.DBError):
        return None