Critics have remarked that those four worthies were truly peerless throughout the ages; yet the present falls short of the pastβthe ancients favored unadorned simplicity, whereas the moderns prefer refined elegance. Styles of substance and ornament rise and fall in succession, shifting with the changing mores of the times; such evolution is simply the natural order of things. The ideal lies in honoring antiquity without clashing with the present, and embracing modernity without succumbing to its flawsβembodying that perfect balance of substance and refinement that defines the true gentleman. There is surely no need to abandon a carved palace in favor of a cave dwelling, or to trade a jade carriage for a primitive cart with solid wooden wheels.π SpectraShell
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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). It does, however, optionally implement HTTP/1.1
persistent connections, as of version 0.3.
Contents:
- BaseHTTPRequestHandler: HTTP request handler base class
- test: test function
XXX To do:
- log requests even later (to capture byte count)
- log user-agent header and other interesting goodies
- send error log to separate file
s 0.3t
HTTPServert BaseHTTPRequestHandleriοΏ½οΏ½οΏ½οΏ½N( t filterwarningst catch_warningst ignores .*mimetools has been removedsοΏ½ <head>
<title>Error response</title>
</head>
<body>
<h1>Error response</h1>
<p>Error code %(code)d.
<p>Message: %(message)s.
<p>Error code explanation: %(code)s = %(explain)s.
</body>
s text/htmlc C s( | j d d οΏ½ j d d οΏ½ j d d οΏ½ S( Nt &s &t <s <t >s >( t replace( t html( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt _quote_htmlc s c B s e Z d Z d οΏ½ Z RS( i c C sH t j j | οΏ½ | j j οΏ½ d \ } } t j | οΏ½ | _ | | _ d S( s. Override server_bind to store the server name.i N( t SocketServert TCPServert server_bindt sockett getsocknamet getfqdnt server_namet server_port( t selft hostt port( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyR
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Z d& οΏ½ Z d' Z e j! Z" i( dοΏ½ d* 6dοΏ½ d- 6dοΏ½ d0 6dοΏ½ d3 6dοΏ½ d6 6dοΏ½ d9 6dοΏ½ d< 6dοΏ½ d? 6dοΏ½ dB 6dοΏ½ dE 6dοΏ½ dH 6dοΏ½ dK 6dοΏ½ dN 6dοΏ½ dQ 6dοΏ½ dT 6dοΏ½ dV 6dοΏ½ dY 6dοΏ½ d\ 6dοΏ½ d_ 6dοΏ½ db 6dοΏ½ de 6dοΏ½ dh 6dοΏ½ dk 6dοΏ½ dn 6dοΏ½ dq 6dοΏ½ dt 6dοΏ½ dw 6dοΏ½ dz 6dοΏ½ d} 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6dοΏ½ dοΏ½ 6Z# RS(οΏ½ sοΏ½ HTTP request handler base class.
The following explanation of HTTP serves to guide you through the
code as well as to expose any misunderstandings I may have about
HTTP (so you don't need to read the code to figure out I'm wrong
:-).
HTTP (HyperText Transfer Protocol) is an extensible protocol on
top of a reliable stream transport (e.g. TCP/IP). The protocol
recognizes three parts to a request:
1. One line identifying the request type and path
2. An optional set of RFC-822-style headers
3. An optional data part
The headers and data are separated by a blank line.
The first line of the request has the form
<command> <path> <version>
where <command> is a (case-sensitive) keyword such as GET or POST,
<path> is a string containing path information for the request,
and <version> should be the string "HTTP/1.0" or "HTTP/1.1".
<path> is encoded using the URL encoding scheme (using %xx to signify
the ASCII character with hex code xx).
The specification specifies that lines are separated by CRLF but
for compatibility with the widest range of clients recommends
servers also handle LF. Similarly, whitespace in the request line
is 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
<command> <path>
(i.e. <version> 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.x 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
<version> <responsecode> <responsestring>
where <version> is the protocol version ("HTTP/1.0" or "HTTP/1.1"),
<responsecode> is a 3-digit response code indicating success or
failure of the request, and <responsestring> 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 (<command>). Specifically,
a request SPAM will be handled by a method do_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: <type>/<subtype>
where <type> and <subtype> should be registered MIME types,
e.g. "text/html" or "text/plain".
s Python/i s BaseHTTP/s HTTP/0.9c C sοΏ½ d | _ | j | _ } d | _ | j } | j d οΏ½ } | | _ | j οΏ½ } t | οΏ½ d k ry| \ } } } | d d k rοΏ½ | j
d d | οΏ½ t Syd | j d d οΏ½ d } | j d οΏ½ } t | οΏ½ d
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d d | οΏ½ t SX| d k rR| j d k rRd | _ n | d k rοΏ½| j
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k rοΏ½| \ } } d | _ | d k rοΏ½| j
d d | οΏ½ t Sn" | sοΏ½t S| j
d d | οΏ½ t S| | | | _ | _ | _ | j | j d οΏ½ | _ | j j d d οΏ½ } | j οΏ½ d k rQd | _ n- | j οΏ½ d k r~| j d k r~d | _ n t S( s' Parse a request (internal).
The request should be stored in self.raw_requestline; the results
are in self.command, self.path, self.request_version and
self.headers.
Return True for success, False for failure; on failure, an
error is sent back.
i s
i i s HTTP/iοΏ½ s Bad request version (%r)t /t .i i s HTTP/1.1iοΏ½ s Invalid HTTP Version (%s)t GETs Bad HTTP/0.9 request type (%r)s Bad request syntax (%r)t
Connectiont t closes
keep-aliveN( i i ( i i ( t Nonet commandt default_request_versiont request_versiont close_connectiont raw_requestlinet rstript requestlinet splitt lent
send_errort Falset
ValueErrort intt
IndexErrort protocol_versiont patht MessageClasst rfilet headerst gett lowert True( R t versionR& t wordsR R/ t base_version_numbert version_numbert conntype( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt
parse_requestοΏ½ s^ $ c C s yοΏ½ | j j d οΏ½ | _ t | j οΏ½ d k rY d | _ d | _ d | _ | j d οΏ½ d S| j so d | _ d S| j οΏ½ s d Sd | j } t
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| οΏ½ d | _ d SXd S( sοΏ½ 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.
i i R iοΏ½ Ni t do_iοΏ½ s Unsupported method (%r)s Request timed out: %r( R1 t readlineR$ R( R& R" R R) R# R; t hasattrt getattrt wfilet flushR t timeoutt log_error( R t mnamet methodt e( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt handle_one_request- s0
c C s1 d | _ | j οΏ½ x | j s, | j οΏ½ q Wd S( s& Handle multiple requests if necessary.i N( R# RG ( R ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt handleP s
c C s y | j | \ } } Wn t k
r6 d \ } } n X| d k rL | } n | } | j d | | οΏ½ | j | | οΏ½ | j d d οΏ½ d } | d k rοΏ½ | d k rοΏ½ | j i | d 6t | οΏ½ d
6| d 6} | j d | j οΏ½ n | j οΏ½ | j
d
k r| r| j j | οΏ½ n d S( sοΏ½ 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 %sR R iοΏ½ iοΏ½ iοΏ½ i0 t codet messaget explains Content-Typet HEADN( s ???s ???( iοΏ½ iοΏ½ i0 (
t responsest KeyErrorR RC t
send_responset send_headert error_message_formatR
t error_content_typet end_headersR R@ t write( R RI RJ t shortt longRK t content( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyR) X s(
c C sοΏ½ | j | οΏ½ | d k rE | | j k r< | j | d } qE d } n | j d k rw | j j d | j | | f οΏ½ n | j d | j οΏ½ οΏ½ | j d | j οΏ½ οΏ½ d S( sοΏ½ Send the response header and log the response code.
Also send two standard headers with the server software
version and the current date.
i R s HTTP/0.9s
%s %d %s
t Servert DateN(
t log_requestR RM R" R@ RT R. RP t version_stringt date_time_string( R RI RJ ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRO οΏ½ s
c C sοΏ½ | j d k r, | j j d | | f οΏ½ n | j οΏ½ d k r} | j οΏ½ d k r\ d | _ q} | j οΏ½ d k r} d | _ q} n d S( s Send a MIME header.s HTTP/0.9s %s: %s
t
connectionR i s
keep-alivei N( R" R@ RT R4 R# ( R t keywordt value( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRP οΏ½ s c C s& | j d k r" | j j d οΏ½ n d S( s, Send the blank line ending the MIME headers.s HTTP/0.9s
N( R" R@ RT ( R ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRS οΏ½ s t -c C s) | j d | j t | οΏ½ t | οΏ½ οΏ½ d S( sN Log an accepted request.
This is called by send_response().
s
"%s" %s %sN( t log_messageR& t str( R RI t size( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRZ οΏ½ s c G s | j | | οΏ½ d S( sοΏ½ 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( Ra ( R t formatt args( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRC οΏ½ s c G s2 t j j d | j d | j οΏ½ | | f οΏ½ d S( sοΏ½ 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 ip address and current date/time are prefixed to every
message.
s %s - - [%s] %s
i N( t syst stderrRT t client_addresst log_date_time_string( R Rd Re ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRa οΏ½ s
c C s | j d | j S( s* Return the server software version string.t ( t server_versiont sys_version( R ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyR[ οΏ½ s c C sv | d k r t j οΏ½ } n t j | οΏ½ \ } } } } } } } } }
d | j | | | j | | | | | f } | S( s@ Return the current date and time formatted for a message header.s# %s, %02d %3s %4d %02d:%02d:%02d GMTN( R t timet gmtimet weekdaynamet monthname( R t timestampt yeart montht dayt hht mmt sst wdt yt zt s( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyR\ οΏ½ s *
c C s] t j οΏ½ } t j | οΏ½ \ } } } } } } } } }
d | | j | | | | | f } | S( s. Return the current time formatted for logging.s %02d/%3s/%04d %02d:%02d:%02d( Rm t localtimeRp ( R t nowRr Rs Rt Ru Rv Rw t xRy Rz R{ ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyRi οΏ½ s
* t Mont Tuet Wedt Thut Frit Satt Sunt Jant Febt Mart Aprt Mayt Junt Jult Augt Sept Octt Novt Decc C s | j d \ } } t j | οΏ½ S( sοΏ½ 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 ( Rh R R ( R R R ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt address_stringοΏ½ s s HTTP/1.0t Continues! Request received, please continueid s Switching Protocolss. Switching to new protocol; obey Upgrade headerie t OKs# Request fulfilled, document followsiοΏ½ t Createds Document created, URL followsiοΏ½ t Accepteds/ Request accepted, processing continues off-lineiοΏ½ s Non-Authoritative Informations Request fulfilled from cacheiοΏ½ s
No Contents" Request fulfilled, nothing followsiοΏ½ s
Reset Contents# Clear input form for further input.iοΏ½ s Partial Contents Partial content follows.iοΏ½ s Multiple Choicess, Object has several resources -- see URI listi, s Moved Permanentlys( Object moved permanently -- see URI listi- t Founds( Object moved temporarily -- see URI listi. s See Others' Object moved -- see Method and URL listi/ s Not Modifieds) Document has not changed since given timei0 s Use ProxysA You must use proxy specified in Location to access this resource.i1 s Temporary Redirecti3 s Bad Requests( Bad request syntax or unsupported methodiοΏ½ t Unauthorizeds* No permission -- see authorization schemesiοΏ½ s Payment Requireds" No payment -- see charging schemesiοΏ½ t Forbiddens0 Request forbidden -- authorization will not helpiοΏ½ s Not Founds Nothing matches the given URIiοΏ½ s Method Not Alloweds. Specified method is invalid for this resource.iοΏ½ s Not Acceptables& URI not available in preferred format.iοΏ½ s Proxy Authentication Requireds8 You must authenticate with this proxy before proceeding.iοΏ½ s Request Timeouts# Request timed out; try again later.iοΏ½ t Conflicts Request conflict.iοΏ½ t Gones6 URI no longer exists and has been permanently removed.iοΏ½ s Length Requireds# Client must specify Content-Length.iοΏ½ s Precondition Faileds! Precondition in headers is false.iοΏ½ s Request Entity Too Larges Entity is too large.iοΏ½ s Request-URI Too Longs URI is too long.iοΏ½ s Unsupported Media Types" Entity body in unsupported format.iοΏ½ s Requested Range Not Satisfiables Cannot satisfy request range.iοΏ½ s Expectation Faileds( Expect condition could not be satisfied.iοΏ½ s Internal Server Errors Server got itself in troubleiοΏ½ s Not Implementeds& Server does not support this operationiοΏ½ s Bad Gateways, Invalid responses from another server/proxy.iοΏ½ s Service Unavailables8 The server cannot process the request due to a high loadiοΏ½ s Gateway Timeouts4 The gateway server did not receive a timely responseiοΏ½ s HTTP Version Not Supporteds Cannot fulfill request.iοΏ½ N( RοΏ½ s! Request received, please continue( s Switching Protocolss. Switching to new protocol; obey Upgrade header( RοΏ½ s# Request fulfilled, document follows( RοΏ½ s Document created, URL follows( RοΏ½ s/ Request accepted, processing continues off-line( s Non-Authoritative Informations Request fulfilled from cache( s
No Contents" Request fulfilled, nothing follows( s
Reset Contents# Clear input form for further input.( s Partial Contents Partial content follows.( s Multiple Choicess, Object has several resources -- see URI list( s Moved Permanentlys( Object moved permanently -- see URI list( RοΏ½ s( Object moved temporarily -- see URI list( s See Others' Object moved -- see Method and URL list( s Not Modifieds) Document has not changed since given time( s Use ProxysA You must use proxy specified in Location to access this resource.( s Temporary Redirects( Object moved temporarily -- see URI list( s Bad Requests( Bad request syntax or unsupported method( RοΏ½ s* No permission -- see authorization schemes( s Payment Requireds" No payment -- see charging schemes( RοΏ½ s0 Request forbidden -- authorization will not help( s Not Founds Nothing matches the given URI( s Method Not Alloweds. Specified method is invalid for this resource.( s Not Acceptables& URI not available in preferred format.( s Proxy Authentication Requireds8 You must authenticate with this proxy before proceeding.( s Request Timeouts# Request timed out; try again later.( RοΏ½ s Request conflict.( RοΏ½ s6 URI no longer exists and has been permanently removed.( s Length Requireds# Client must specify Content-Length.( s Precondition Faileds! Precondition in headers is false.( s Request Entity Too Larges Entity is too large.( s Request-URI Too Longs URI is too long.( s Unsupported Media Types" Entity body in unsupported format.( s Requested Range Not Satisfiables Cannot satisfy request range.( s Expectation Faileds( Expect condition could not be satisfied.( s Internal Server Errors Server got itself in trouble( s Not Implementeds& Server does not support this operation( s Bad Gateways, Invalid responses from another server/proxy.( s Service Unavailables8 The server cannot process the request due to a high load( s Gateway Timeouts4 The gateway server did not receive a timely response( s HTTP Version Not Supporteds Cannot fulfill request.($ R R t __doc__Rf R6 R' Rl t __version__Rk R! R; RG RH R R) t DEFAULT_ERROR_MESSAGERQ t DEFAULT_ERROR_CONTENT_TYPERR RO RP RS RZ RC Ra R[ R\ Ri Ro Rp RοΏ½ R. t mimetoolst MessageR0 RM ( ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyR r sοΏ½ f
E # *
s HTTP/1.0c C sοΏ½ t j d r# t t j d οΏ½ } n d } d | f } | | _ | | | οΏ½ } | j j οΏ½ } d G| d Gd G| d Gd GH| j οΏ½ d S( s Test the HTTP request handler class.
This runs an HTTP server on port 8000 (or the first command line
argument).
i i@ R s Serving HTTP oni R s ...N( Rf t argvR, R. R R t
serve_forever( t HandlerClasst ServerClasst protocolR t server_addresst httpdt sa( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt testN s
t __main__( RοΏ½ RοΏ½ t __all__Rf Rm R t warningsR R t py3kwarningt DeprecationWarningRοΏ½ R RοΏ½ RοΏ½ R
R R t StreamRequestHandlerR RοΏ½ R ( ( ( s& /usr/lib64/python2.7/BaseHTTPServer.pyt <module> s, 3
οΏ½ οΏ½
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