Created
June 17, 2011 09:24
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monitor3.py
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| from twisted.web.resource import Resource | |
| from twisted.web.server import Site, NOT_DONE_YET | |
| from twisted.web.client import getPage | |
| from twisted.internet import reactor, defer, task | |
| from twisted.names.client import createResolver | |
| from twisted.names import dns | |
| from twisted.python import log | |
| import sys | |
| log.startLogging(sys.stdout) | |
| class Index(Resource): | |
| def got_site(self, data, site, request, aggregates): | |
| aggregates['OK'] += 1 | |
| request.write(str(aggregates)) | |
| request.write('\r\n') | |
| def got_error(self, error, site, request, aggregates): | |
| if error.type == defer.TimeoutError: | |
| aggregates['TIMEOUT'] += 1 | |
| request.write(site) | |
| request.write(' ') | |
| request.write('TIMEOUT') | |
| request.write('\r\n') | |
| else: | |
| aggregates['ERROR'] += 1 | |
| request.write(site) | |
| request.write(' ') | |
| request.write(str(error.value)) | |
| request.write(' ') | |
| if isinstance(error.value, dns.Message): | |
| print 'DNS MESSAGE' | |
| request.write(error.value.toStr()) | |
| else: | |
| request.write(error.getErrorMessage()) | |
| request.write('\r\n') | |
| request.write(str(aggregates)) | |
| request.write('\r\n') | |
| def getPage(self, address, request, aggregates): | |
| d = getPage(address, timeout=10) | |
| d.addCallback(self.got_site, address, request, aggregates) | |
| d.addErrback(self.got_error, address, request, aggregates) | |
| return d | |
| def render_GET(self, request): | |
| request.write('<html><body>') | |
| dl = [] | |
| aggregates = { | |
| 'OK': 0, | |
| 'TIMEOUT': 0, | |
| 'ERROR': 0 | |
| } | |
| SITES = ["apple.com", 'adobe.com'] | |
| work = (self.getPage('http://' + site, request, aggregates) for site in SITES) | |
| for i in range(10): | |
| d = task.cooperate(work).whenDone() | |
| dl.append(d) | |
| dl = defer.DeferredList(dl) | |
| def finished(results): | |
| request.write('</body></html>') | |
| request.finish() | |
| dl.addCallback(finished) | |
| return NOT_DONE_YET | |
| root = Resource() | |
| root.putChild('', Index()) | |
| factory = Site(root) | |
| reactor.installResolver(createResolver()) | |
| reactor.listenTCP(8000, factory) | |
| reactor.run() |
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