diff options
Diffstat (limited to 'src/leap/common/http.py')
| -rw-r--r-- | src/leap/common/http.py | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/leap/common/http.py b/src/leap/common/http.py index 1e384e5..d4a214c 100644 --- a/src/leap/common/http.py +++ b/src/leap/common/http.py @@ -35,6 +35,7 @@ from leap.common.certs import get_compatible_ssl_context_factory from zope.interface import implements from twisted.internet import reactor +from twisted.internet import defer from twisted.internet.defer import succeed from twisted.web.client import Agent @@ -56,6 +57,13 @@ class HTTPClient(object): """ HTTP client done the twisted way, with a main focus on pinning the SSL certificate. + + By default, it uses a shared connection pool. If you want a dedicated + one, create and pass on __init__ pool parameter. + Please note that this client will limit the maximum amount of connections + by using a DeferredSemaphore. + This limit is equal to the maxPersistentPerHost used on pool and is needed + in order to avoid resource abuse on huge requests batches. """ def __init__(self, cert_file=None, pool=_pool): @@ -65,6 +73,9 @@ class HTTPClient(object): :param cert_file: The path to the certificate file, if None given the system's CAs will be used. :type cert_file: str + :param pool: An optional dedicated connection pool to override the + default shared one. + :type pool: HTTPConnectionPool """ policy = get_compatible_ssl_context_factory(cert_file) @@ -73,6 +84,7 @@ class HTTPClient(object): reactor, policy, pool=pool) + self._semaphore = defer.DeferredSemaphore(pool.maxPersistentPerHost) def request(self, url, method='GET', body=None, headers={}): """ @@ -92,8 +104,9 @@ class HTTPClient(object): """ if body: body = HTTPClient.StringBodyProducer(body) - d = self._agent.request( - method, url, headers=Headers(headers), bodyProducer=body) + d = self._semaphore.run(self._agent.request, + method, url, headers=Headers(headers), + bodyProducer=body) d.addCallback(readBody) return d |