Doc strings by Mitch Chapman (with a little reformatting).

Also reformatted the whole module with 4 spaces and no tabs.
author: Guido van Rossum <guido@python.org> 1997-12-09 00:12:23 (GMT)
committer: Guido van Rossum <guido@python.org> 1997-12-09 00:12:23 (GMT)
commit: 41999c164eabcc3317dae02344c33023103cde71 (patch)
tree: c3bb4da3f8a3bcb60f50c2587cbfd5cc7e94bcd8 /Lib
parent: 1707aad27c36024d8ee00bd59ee223d16a9bb6d1 (diff)
download: cpython-41999c164eabcc3317dae02344c33023103cde71.zip
cpython-41999c164eabcc3317dae02344c33023103cde71.tar.gz
cpython-41999c164eabcc3317dae02344c33023103cde71.tar.bz2
1 files changed, 174 insertions, 118 deletions
diff --git a/Lib/httplib.py b/Lib/httplib.py
index fa7d2b7..7081bd1 100644
--- a/Lib/httplib.py
+++ b/Lib/httplib.py
@@ -1,32 +1,32 @@
-# HTTP client class
-#
-# See the following URL for a description of the HTTP/1.0 protocol:
-# http://www.w3.org/hypertext/WWW/Protocols/
-# (I actually implemented it from a much earlier draft.)
-#
-# Example:
-#
-# >>> from httplib import HTTP
-# >>> h = HTTP('www.python.org')
-# >>> h.putrequest('GET', '/index.html')
-# >>> h.putheader('Accept', 'text/html')
-# >>> h.putheader('Accept', 'text/plain')
-# >>> h.endheaders()
-# >>> errcode, errmsg, headers = h.getreply()
-# >>> if errcode == 200:
-# ...     f = h.getfile()
-# ...     print f.read() # Print the raw HTML
-# ...
-# <HEAD>
-# <TITLE>Python Language Home Page</TITLE>
-# [...many more lines...]
-# >>>
-#
-# Note that an HTTP object is used for a single request -- to issue a
-# second request to the same server, you create a new HTTP object.
-# (This is in accordance with the protocol, which uses a new TCP
-# connection for each request.)
-
+"""HTTP client class
+
+See the following URL for a description of the HTTP/1.0 protocol:
+http://www.w3.org/hypertext/WWW/Protocols/
+(I actually implemented it from a much earlier draft.)
+
+Example:
+
+>>> from httplib import HTTP
+>>> h = HTTP('www.python.org')
+>>> h.putrequest('GET', '/index.html')
+>>> h.putheader('Accept', 'text/html')
+>>> h.putheader('Accept', 'text/plain')
+>>> h.endheaders()
+>>> errcode, errmsg, headers = h.getreply()
+>>> if errcode == 200:
+...     f = h.getfile()
+...     print f.read() # Print the raw HTML
+...
+<HEAD>
+<TITLE>Python Language Home Page</TITLE>
+[...many more lines...]
+>>>
+
+Note that an HTTP object is used for a single request -- to issue a
+second request to the same server, you create a new HTTP object.
+(This is in accordance with the protocol, which uses a new TCP
+connection for each request.)
+"""
 
 import socket
 import string
@@ -36,98 +36,154 @@ HTTP_VERSION = 'HTTP/1.0'
 HTTP_PORT = 80
 
 class HTTP:
-
-	def __init__(self, host = '', port = 0):
-		self.debuglevel = 0
-		self.file = None
-		if host: self.connect(host, port)
-
-	def set_debuglevel(self, debuglevel):
-		self.debuglevel = debuglevel
-
-	def connect(self, host, port = 0):
-		if not port:
-			i = string.find(host, ':')
-			if i >= 0:
-				host, port = host[:i], host[i+1:]
-				try: port = string.atoi(port)
-				except string.atoi_error:
-				    raise socket.error, "nonnumeric port"
-		if not port: port = HTTP_PORT
-		self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-		if self.debuglevel > 0: print 'connect:', (host, port)
-		self.sock.connect(host, port)
-
-	def send(self, str):
-		if self.debuglevel > 0: print 'send:', `str`
-		self.sock.send(str)
-
-	def putrequest(self, request, selector):
-		if not selector: selector = '/'
-		str = '%s %s %s\r\n' % (request, selector, HTTP_VERSION)
-		self.send(str)
-
-	def putheader(self, header, *args):
-		str = '%s: %s\r\n' % (header, string.joinfields(args,'\r\n\t'))
-		self.send(str)
-
-	def endheaders(self):
-		self.send('\r\n')
-
-	def getreply(self):
-		self.file = self.sock.makefile('rb')
-		line = self.file.readline()
-		if self.debuglevel > 0: print 'reply:', `line`
-		try:
-		    [ver, code, msg] = string.split(line, None, 2)
-		except ValueError:
-		    self.headers = None
-		    return -1, line, self.headers
-		if ver[:5] != 'HTTP/':
-		    self.headers = None
-		    return -1, line, self.headers
-		errcode = string.atoi(code)
-                errmsg = string.strip(msg)
-		self.headers = mimetools.Message(self.file, 0)
-		return errcode, errmsg, self.headers
-
-	def getfile(self):
-		return self.file
-
-	def close(self):
-		if self.file:
-			self.file.close()
-		self.file = None
-		if self.sock:
-		    self.sock.close()
-		self.sock = None
+    """This class manages a connection to an HTTP server."""
+    
+    def __init__(self, host = '', port = 0):
+        """Initialize a new instance.
+
+        If specified, `host' is the name of the remote host to which
+        to connect.  If specified, `port' specifies the port to which
+        to connect.  By default, httplib.HTTP_PORT is used.
+
+        """
+        self.debuglevel = 0
+        self.file = None
+        if host: self.connect(host, port)
+    
+    def set_debuglevel(self, debuglevel):
+        """Set the debug output level.
+
+        A non-false value results in debug messages for connection and
+        for all messages sent to and received from the server.
+
+        """
+        self.debuglevel = debuglevel
+    
+    def connect(self, host, port = 0):
+        """Connect to a host on a given port.
+        
+        Note:  This method is automatically invoked by __init__,
+        if a host is specified during instantiation.
+
+        """
+        if not port:
+            i = string.find(host, ':')
+            if i >= 0:
+                host, port = host[:i], host[i+1:]
+                try: port = string.atoi(port)
+                except string.atoi_error:
+                    raise socket.error, "nonnumeric port"
+        if not port: port = HTTP_PORT
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        if self.debuglevel > 0: print 'connect:', (host, port)
+        self.sock.connect(host, port)
+    
+    def send(self, str):
+        """Send `str' to the server."""
+        if self.debuglevel > 0: print 'send:', `str`
+        self.sock.send(str)
+    
+    def putrequest(self, request, selector):
+        """Send a request to the server.
+
+        `request' specifies an HTTP request method, e.g. 'GET'.
+        `selector' specifies the object being requested, e.g.
+        '/index.html'.
+
+        """
+        if not selector: selector = '/'
+        str = '%s %s %s\r\n' % (request, selector, HTTP_VERSION)
+        self.send(str)
+    
+    def putheader(self, header, *args):
+        """Send a request header line to the server.
+
+        For example: h.putheader('Accept', 'text/html')
+
+        """
+        str = '%s: %s\r\n' % (header, string.joinfields(args,'\r\n\t'))
+        self.send(str)
+    
+    def endheaders(self):
+        """Indicate that the last header line has been sent to the server."""
+        self.send('\r\n')
+    
+    def getreply(self):
+        """Get a reply from the server.
+        
+        Returns a tuple consisting of:
+        - server response code (e.g. '200' if all goes well)
+        - server response string corresponding to response code
+        - any RFC822 headers in the response from the server
+
+        """
+        self.file = self.sock.makefile('rb')
+        line = self.file.readline()
+        if self.debuglevel > 0: print 'reply:', `line`
+        try:
+            [ver, code, msg] = string.split(line, None, 2)
+        except ValueError:
+            self.headers = None
+            return -1, line, self.headers
+        if ver[:5] != 'HTTP/':
+            self.headers = None
+            return -1, line, self.headers
+        errcode = string.atoi(code)
+        errmsg = string.strip(msg)
+        self.headers = mimetools.Message(self.file, 0)
+        return errcode, errmsg, self.headers
+    
+    def getfile(self):
+        """Get a file object from which to receive data from the HTTP server.
+
+        NOTE:  This method must not be invoked until getreplies
+        has been invoked.
+
+        """
+        return self.file
+    
+    def close(self):
+        """Close the connection to the HTTP server."""
+        if self.file:
+            self.file.close()
+        self.file = None
+        if self.sock:
+            self.sock.close()
+        self.sock = None
 
 
 def test():
-	import sys
-	import getopt
-	opts, args = getopt.getopt(sys.argv[1:], 'd')
-	dl = 0
-	for o, a in opts:
-		if o == '-d': dl = dl + 1
-	host = 'www.python.org'
-	selector = '/'
-	if args[0:]: host = args[0]
-	if args[1:]: selector = args[1]
-	h = HTTP()
-	h.set_debuglevel(dl)
-	h.connect(host)
-	h.putrequest('GET', selector)
-	h.endheaders()
-	errcode, errmsg, headers = h.getreply()
-	print 'errcode =', errcode
-	print 'errmsg  =', errmsg
-	print
-	if headers:
-		for header in headers.headers: print string.strip(header)
-	print
-	print h.getfile().read()
+    """Test this module.
+
+    The test consists of retrieving and displaying the Python
+    home page, along with the error code and error string returned
+    by the www.python.org server.
+
+    """
+    import sys
+    import getopt
+    opts, args = getopt.getopt(sys.argv[1:], 'd')
+    dl = 0
+    for o, a in opts:
+        if o == '-d': dl = dl + 1
+    host = 'www.python.org'
+    selector = '/'
+    if args[0:]: host = args[0]
+    if args[1:]: selector = args[1]
+    h = HTTP()
+    h.set_debuglevel(dl)
+    h.connect(host)
+    h.putrequest('GET', selector)
+    h.endheaders()
+    errcode, errmsg, headers = h.getreply()
+    print 'errcode =', errcode
+    print 'errmsg  =', errmsg
+    print
+    if headers:
+        for header in headers.headers: print string.strip(header)
+    print
+    print h.getfile().read()
 
 
 if __name__ == '__main__':
-	test()
+    test()
author	Guido van Rossum <guido@python.org>	1997-12-09 00:12:23 (GMT)
committer	Guido van Rossum <guido@python.org>	1997-12-09 00:12:23 (GMT)
commit	41999c164eabcc3317dae02344c33023103cde71 (patch)
tree	c3bb4da3f8a3bcb60f50c2587cbfd5cc7e94bcd8 /Lib
parent	1707aad27c36024d8ee00bd59ee223d16a9bb6d1 (diff)
download	cpython-41999c164eabcc3317dae02344c33023103cde71.zip cpython-41999c164eabcc3317dae02344c33023103cde71.tar.gz cpython-41999c164eabcc3317dae02344c33023103cde71.tar.bz2