Add project files.

env/Lib/site-packages/gunicorn/sock.py

@@ -0,0 +1,231 @@
+#
+# This file is part of gunicorn released under the MIT license.
+# See the NOTICE for more information.
+
+import errno
+import os
+import socket
+import ssl
+import stat
+import sys
+import time
+
+from gunicorn import util
+
+
+class BaseSocket:
+
+    def __init__(self, address, conf, log, fd=None):
+        self.log = log
+        self.conf = conf
+
+        self.cfg_addr = address
+        if fd is None:
+            sock = socket.socket(self.FAMILY, socket.SOCK_STREAM)
+            bound = False
+        else:
+            sock = socket.fromfd(fd, self.FAMILY, socket.SOCK_STREAM)
+            os.close(fd)
+            bound = True
+
+        self.sock = self.set_options(sock, bound=bound)
+
+    def __str__(self):
+        return "<socket %d>" % self.sock.fileno()
+
+    def __getattr__(self, name):
+        return getattr(self.sock, name)
+
+    def set_options(self, sock, bound=False):
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        if (self.conf.reuse_port
+                and hasattr(socket, 'SO_REUSEPORT')):  # pragma: no cover
+            try:
+                sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+            except OSError as err:
+                if err.errno not in (errno.ENOPROTOOPT, errno.EINVAL):
+                    raise
+        if not bound:
+            self.bind(sock)
+        sock.setblocking(0)
+
+        # make sure that the socket can be inherited
+        if hasattr(sock, "set_inheritable"):
+            sock.set_inheritable(True)
+
+        sock.listen(self.conf.backlog)
+        return sock
+
+    def bind(self, sock):
+        sock.bind(self.cfg_addr)
+
+    def close(self):
+        if self.sock is None:
+            return
+
+        try:
+            self.sock.close()
+        except OSError as e:
+            self.log.info("Error while closing socket %s", str(e))
+
+        self.sock = None
+
+
+class TCPSocket(BaseSocket):
+
+    FAMILY = socket.AF_INET
+
+    def __str__(self):
+        if self.conf.is_ssl:
+            scheme = "https"
+        else:
+            scheme = "http"
+
+        addr = self.sock.getsockname()
+        return "%s://%s:%d" % (scheme, addr[0], addr[1])
+
+    def set_options(self, sock, bound=False):
+        sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
+        return super().set_options(sock, bound=bound)
+
+
+class TCP6Socket(TCPSocket):
+
+    FAMILY = socket.AF_INET6
+
+    def __str__(self):
+        (host, port, _, _) = self.sock.getsockname()
+        return "http://[%s]:%d" % (host, port)
+
+
+class UnixSocket(BaseSocket):
+
+    FAMILY = socket.AF_UNIX
+
+    def __init__(self, addr, conf, log, fd=None):
+        if fd is None:
+            try:
+                st = os.stat(addr)
+            except OSError as e:
+                if e.args[0] != errno.ENOENT:
+                    raise
+            else:
+                if stat.S_ISSOCK(st.st_mode):
+                    os.remove(addr)
+                else:
+                    raise ValueError("%r is not a socket" % addr)
+        super().__init__(addr, conf, log, fd=fd)
+
+    def __str__(self):
+        return "unix:%s" % self.cfg_addr
+
+    def bind(self, sock):
+        old_umask = os.umask(self.conf.umask)
+        sock.bind(self.cfg_addr)
+        util.chown(self.cfg_addr, self.conf.uid, self.conf.gid)
+        os.umask(old_umask)
+
+
+def _sock_type(addr):
+    if isinstance(addr, tuple):
+        if util.is_ipv6(addr[0]):
+            sock_type = TCP6Socket
+        else:
+            sock_type = TCPSocket
+    elif isinstance(addr, (str, bytes)):
+        sock_type = UnixSocket
+    else:
+        raise TypeError("Unable to create socket from: %r" % addr)
+    return sock_type
+
+
+def create_sockets(conf, log, fds=None):
+    """
+    Create a new socket for the configured addresses or file descriptors.
+
+    If a configured address is a tuple then a TCP socket is created.
+    If it is a string, a Unix socket is created. Otherwise, a TypeError is
+    raised.
+    """
+    listeners = []
+
+    # get it only once
+    addr = conf.address
+    fdaddr = [bind for bind in addr if isinstance(bind, int)]
+    if fds:
+        fdaddr += list(fds)
+    laddr = [bind for bind in addr if not isinstance(bind, int)]
+
+    # check ssl config early to raise the error on startup
+    # only the certfile is needed since it can contains the keyfile
+    if conf.certfile and not os.path.exists(conf.certfile):
+        raise ValueError('certfile "%s" does not exist' % conf.certfile)
+
+    if conf.keyfile and not os.path.exists(conf.keyfile):
+        raise ValueError('keyfile "%s" does not exist' % conf.keyfile)
+
+    # sockets are already bound
+    if fdaddr:
+        for fd in fdaddr:
+            sock = socket.fromfd(fd, socket.AF_UNIX, socket.SOCK_STREAM)
+            sock_name = sock.getsockname()
+            sock_type = _sock_type(sock_name)
+            listener = sock_type(sock_name, conf, log, fd=fd)
+            listeners.append(listener)
+
+        return listeners
+
+    # no sockets is bound, first initialization of gunicorn in this env.
+    for addr in laddr:
+        sock_type = _sock_type(addr)
+        sock = None
+        for i in range(5):
+            try:
+                sock = sock_type(addr, conf, log)
+            except OSError as e:
+                if e.args[0] == errno.EADDRINUSE:
+                    log.error("Connection in use: %s", str(addr))
+                if e.args[0] == errno.EADDRNOTAVAIL:
+                    log.error("Invalid address: %s", str(addr))
+                msg = "connection to {addr} failed: {error}"
+                log.error(msg.format(addr=str(addr), error=str(e)))
+                if i < 5:
+                    log.debug("Retrying in 1 second.")
+                    time.sleep(1)
+            else:
+                break
+
+        if sock is None:
+            log.error("Can't connect to %s", str(addr))
+            sys.exit(1)
+
+        listeners.append(sock)
+
+    return listeners
+
+
+def close_sockets(listeners, unlink=True):
+    for sock in listeners:
+        sock_name = sock.getsockname()
+        sock.close()
+        if unlink and _sock_type(sock_name) is UnixSocket:
+            os.unlink(sock_name)
+
+
+def ssl_context(conf):
+    def default_ssl_context_factory():
+        context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH, cafile=conf.ca_certs)
+        context.load_cert_chain(certfile=conf.certfile, keyfile=conf.keyfile)
+        context.verify_mode = conf.cert_reqs
+        if conf.ciphers:
+            context.set_ciphers(conf.ciphers)
+        return context
+
+    return conf.ssl_context(conf, default_ssl_context_factory)
+
+
+def ssl_wrap_socket(sock, conf):
+    return ssl_context(conf).wrap_socket(sock,
+                                         server_side=True,
+                                         suppress_ragged_eofs=conf.suppress_ragged_eofs,
+                                         do_handshake_on_connect=conf.do_handshake_on_connect)