Sebastien Lemieux wrote:
Hi fellow webwarer,
I'm wondering if Webware can be adapted to return an image (png for
instance) instead of a HTML page. I've used that trick through .cgi in
the past to have dynamically generated images (most of these .cgi were
coded in C).
i've done a similar thing in the past, the code below just extract the image from a mysql table (using an id passed as querystring) and send to the browser. the use is trivial:
<im src="/path/to/image?id=666" width="300" height="200">
you may want to output some cache info to the browser too, otherwise the browser will keep asking for the same image even if it's not really needed.
hope this helps.
# ------------------ begin ------------------
from WebKit.HTTPServlet import HTTPServlet from WebKit.Application import EndResponse
import db from cms import ImageComponent cm = db.ConnectionManager()
class image(HTTPServlet):
"""
Fetch an image resource given its id and send to browser.
"""def respondToGet(self, transaction):
request = transaction.request()
response = transaction.response() id = request.field('id', '').strip()
if not id.isdigit():
# set '400 Bad request' HTTP response
response.sendError(400, 'Bad request')
raise EndResponse# get resource from DB
row = db.row(cm.connection, ImageComponent._table, ImageComponent._pk, int(id))
# set '200 OK' HTTP response
response.setStatus(200, 'OK')data = row['data']
response.setHeader('Content-Type', '%s' % row['mime_type'])
response.setHeader('Content-Length', '%d' % len(data))
response.write(data)response.flush()
# ------------------ end -------------------
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