required). The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

install, the following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

required). The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • Twisted may be used with the classes in interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

or newer. The following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use for most users’ needs. However, some applications may wish to switch to curl_httpclient for reasons such as the following: • curl_httpclient has some features not found in simple_httpclient, including

package in the standard library. pycurl [http://pycurl.sourceforge.net] is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. Twisted [http://www.twistedmatrix.com] may DNS resolution but not on other network access (to mitigate this use ThreadedResolver or a tornado.curl_httpclient with a properly-configured build of libcurl). In the context of Tornado we generally talk interfaces. This module defines a common interface shared by two implementations, simple_httpclient and curl_httpclient. Applications may either instantiate their chosen implementation class directly or use