hey all,
this isn't written totally generally but here is a shot. i would like to
return the raw binary data for an img src request and have it display
properly on the html page. here is my code:
the db.py table definition:
db.define_table('png',
Field('input_date', 'date', comment='format YYYY-MM-DD',
default=datetime.date.today(), writable=False, readable=False),
Field('png', 'blob', comment='which in postgresql 9.1 is a confirmed
bytea field type'),
format = '%(id)s %(input_date)s')
and under default.py controller:
def png():
t = TABLE(TR(TD('png record count: '+str(db(db.png.id>0).count()),
_colspan='3')))
qry = db(db.png.id>0).select()
for q in qry:
t.append(TR(TD(q.input_date), TD(IMG(_src=URL('default',
'getbinary', args=['png', q.id, 'png'])))))
return HTML(BODY(t))
def getbinary():
data =
db(db[request.args[0]].id==int(request.args[1])).select(db[request.args[0]][request.args[2]]).first()
#data = base64.decodestring(data[request.args[2]])
data = data[request.args[2]]
response.headers['Content-Type'] = 'image/png'
return response.write(data, escape=True)
where you can see i experimented with various "things" to try to get it to
display properly under the browser. i have a test png in the database and
under postgresql it is confirmed to be 5513 bytes long in hex format.
can anyone suggest proper working code? i believe the problem is in the
getbinary function. thank you in advance. lucas
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