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s HTTP server base class.
Note: the class in this module doesn't implement any HTTP request; see
SimpleHTTPServer for simple implementations of GET, HEAD and POST
(including CGI scripts).
Contents:
- BaseHTTPRequestHandler: HTTP request handler base class
- test: test function
XXX To do:
- send server version
- log requests even later (to capture byte count)
- log user-agent header and other interesting goodies
- send error log to separate file
- are request names really case sensitive?
s 0.2s
Error response
Error response
Error code %(code)d.
Message: %(message)s.
Error code explanation: %(code)s = %(explain)s.
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where is a (case-sensitive) keyword such as GET or POST,
is a string containing path information for the request,
and should be the string "HTTP/1.0". is encoded
using the URL encoding scheme (using %xx to signify the ASCII
character with hex code xx).
The protocol is vague about whether lines are separated by LF
characters or by CRLF pairs -- for compatibility with the widest
range of clients, both should be accepted. Similarly, whitespace
in the request line should be treated sensibly (allowing multiple
spaces between components and allowing trailing whitespace).
Similarly, for output, lines ought to be separated by CRLF pairs
but most clients grok LF characters just fine.
If the first line of the request has the form
(i.e. is left out) then this is assumed to be an HTTP
0.9 request; this form has no optional headers and data part and
the reply consists of just the data.
The reply form of the HTTP 1.0 protocol again has three parts:
1. One line giving the response code
2. An optional set of RFC-822-style headers
3. The data
Again, the headers and data are separated by a blank line.
The response code line has the form
where is the protocol version (always "HTTP/1.0"),
is a 3-digit response code indicating success or
failure of the request, and is an optional
human-readable string explaining what the response code means.
This server parses the request and the headers, and then calls a
function specific to the request type (). Specifically,
a request SPAM will be handled by a method handle_SPAM(). If no
such method exists the server sends an error response to the
client. If it exists, it is called with no arguments:
do_SPAM()
Note that the request name is case sensitive (i.e. SPAM and spam
are different requests).
The various request details are stored in instance variables:
- client_address is the client IP address in the form (host,
port);
- command, path and version are the broken-down request line;
- headers is an instance of mimetools.Message (or a derived
class) containing the header information;
- rfile is a file object open for reading positioned at the
start of the optional input data part;
- wfile is a file object open for writing.
IT IS IMPORTANT TO ADHERE TO THE PROTOCOL FOR WRITING!
The first thing to be written must be the response line. Then
follow 0 or more header lines, then a blank line, and then the
actual data (if any). The meaning of the header lines depends on
the command executed by the server; in most cases, when data is
returned, there should be at least one header line of the form
Content-type: /
where and should be registered MIME types,
e.g. "text/html" or "text/plain".
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d Sn t | | } | d S( s Handle a single HTTP request.
You normally don't need to override this method; see the class
__doc__ string for information on how to handle specific HTTP
commands such as GET and POST.
s HTTP/0.9i s
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h | d <| d <| d < d S( s Send and log an error reply.
Arguments are the error code, and a detailed message.
The detailed message defaults to the short entry matching the
response code.
This sends an error response (so it must be called before any
output has been generated), logs the error, and finally sends
a piece of HTML explaining the error to the user.
s ???s code %d, message %ss codes messages explainN( s selfs responsess codes shorts longs KeyErrors messages explains log_errors
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send_errors
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3| i d | i d S( s Send the response header and log the response code.
Also send two standard headers with the server software
version and the current date.
i s s HTTP/0.9s
%s %s %s
s Servers DateN( s selfs log_requests codes messages Nones responsess has_keys request_versions wfiles writes protocol_versions strs send_headers version_strings date_time_string( s selfs codes messages2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys
send_response"s
-c s> 567| i d j o! 8| i i d | | f n d S( s Send a MIME header.s HTTP/0.9s %s: %s
N( s selfs request_versions wfiles writes keywords value( s selfs keywords values2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys send_header5s c s4 :;<| i d j o =| i i d n d S( s, Send the blank line ending the MIME headers.s HTTP/0.9s
N( s selfs request_versions wfiles write( s selfs2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys end_headers:s c s5 ?DF| i d G| i t | t | d S( sM Log an accepted request.
This is called by send_reponse().
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"%s" %s %sN( s selfs log_messages requestlines strs codes size( s selfs codes sizes2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys log_request?s s -c s ISUt | i | d S( s Log an error.
This is called when a request cannot be fulfilled. By
default it passes the message on to log_message().
Arguments are the same as for log_message().
XXX This should go to the separate error log.
N( s applys selfs log_messages args( s selfs argss2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys log_errorIs
c s: Wfht i i d | i | i | | f d S( s Log an arbitrary message.
This is used by all other logging functions. Override
it if you have specific logging wishes.
The first argument, FORMAT, is a format string for the
message to be logged. If the format string contains
any % escapes requiring parameters, they should be
specified as subsequent arguments (it's just like
printf!).
The client host and current date/time are prefixed to
every message.
s %s - - [%s] %s
N( s syss stderrs writes selfs address_strings log_date_time_strings formats args( s selfs formats argss2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys log_messageWs c s mno| i d | i Sd S( s* Return the server software version string.s N( s selfs server_versions sys_version( s selfs2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys version_stringms c s} qrst i } tt i | \ } } } } } } } } }
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| | | i | | | | | f } y| Sd S( s@ Return the current date and time formatted for a message header.s# %s, %02d %3s %4d %02d:%02d:%02d GMTN( s times nows gmtimes years months days hhs mms sss wds ys zs selfs weekdaynames monthnames s( s selfs nows years months days hhs mms sss wds ys zs ss2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys date_time_stringqs
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d | | i
| | | | | f } | Sd S( s. Return the current time formatted for logging.s %02d/%3s/%04d %02d:%02d:%02dN( s times nows localtimes years months days hhs mms sss xs ys zs selfs monthnames s( s selfs nows years months days hhs mms sss xs ys zs ss2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys log_date_time_string{s
-&s Mons Tues Weds Thus Fris Sats Suns Jans Febs Mars Aprs Mays Juns Juls Augs Seps Octs Novs Decc s | i \ } } y t i | \ } } } Wn" t i j
o } | Sn X| i d | x. | d r! } d | j o | Sn q~ W| d Sd S( s Return the client address formatted for logging.
This version looks up the full hostname using gethostbyaddr(),
and tries to find a name that contains at least one dot.
i s .N( s selfs client_addresss hosts ports sockets
gethostbyaddrs names namess addressess errors msgs insert( s selfs hosts ports names namess addressess msgs2 /usr/lib/python1.5/site-packages/BaseHTTPServer.pys address_strings s HTTP/1.0s OKs# Request fulfilled, document followsi s Createds Document created, URL followsi s Accepteds/ Request accepted, processing continues off-linei s Partial informations Request fulfilled from cachei s No responses" Request fulfilled, nothing followsi s Moveds( Object moved permanently -- see URI listi- s Founds( Object moved temporarily -- see URI listi. s Methods' Object moved -- see Method and URL listi/ s Not modifieds) Document has not changed singe given timei0 s Bad requests( Bad request syntax or unsupported methodi s Unauthorizeds* No permission -- see authorization schemesi s Payment requireds" No payment -- see charging schemesi s Forbiddens0 Request forbidden -- authorization will not helpi s Not founds Nothing matches the given URIi s Internal errors Server got itself in troublei s Not implementeds& Server does not support this operationi s Service temporarily overloadeds8 The server cannot process the request due to a high loadi s Gateway timeouts4 The gateway server did not receive a timely responsei ( s __doc__s strings splits syss versions sys_versions __version__s server_versions handles Nones
send_errors DEFAULT_ERROR_MESSAGEs error_message_formats
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d } d | f } | | | } d G| Gd GH| i d S( s Test the HTTP request handler class.
This runs an HTTP server on port 8000 (or the first command line
argument).
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