Kartograph web.py API

kartograph-api.py

#!/usr/bin/env python
import web
import json
from kartograph.kartograph import Kartograph

urls = (
    '/1.0/svg/', 'GenerateSVG',
)

app = web.application(urls, globals())

kartographInstance = Kartograph()

class JsonApi(object):
    """ base class for api classes """
    def jsonify(self, result):
        data = web.input()
        if 'callback' in data:
            return data.callback + '(' + json.dumps(result) + ');'
        else:
            return json.dumps(result)

    def error(self, message):
        return self.jsonify(dict(result='error', message=message))


class GenerateSVG(JsonApi):
    def GET(self):
        data = web.input()
        if 'format' in data:
            format = data['format']
        else:
            format = 'json'
        if 'config' in data:
            if format == 'json':
                try:
                    cfg = json.loads(data['config'])
                except:
                    return self.error('error while parsing json map configuration')
            else:
                return self.error('unknown map configuration format: ' + format)
            global kartographInstance
            k = kartographInstance
            web.header('Content-Type', 'image/svg+xml')
            return k.generate(cfg, preview=False)

        else:
            return self.error('no map configuration given')

if __name__ == "__main__":
    app.run()