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Note: BaseHTTPRequestHandler doesn't implement any HTTP request; see
SimpleHTTPRequestHandler for simple implementations of GET, HEAD and POST,
and CGIHTTPRequestHandler for CGI scripts.
It does, however, optionally implement HTTP/1.1 persistent connections,
as of version 0.3.
Notes on CGIHTTPRequestHandler
------------------------------
This class implements GET and POST requests to cgi-bin scripts.
If the os.fork() function is not present (e.g. on Windows),
subprocess.Popen() is used as a fallback, with slightly altered semantics.
In all cases, the implementation is intentionally naive -- all
requests are executed synchronously.
SECURITY WARNING: DON'T USE THIS CODE UNLESS YOU ARE INSIDE A FIREWALL
-- it may execute arbitrary Python code or external programs.
Note that status code 200 is sent prior to execution of a CGI script, so
scripts cannot send other status codes such as 302 (redirect).
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
z0.6Ú
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ztext/html;charset=utf-8c @ s e Zd ZdZdd„ ZdS )r é c C s4 t j | ¡ | jdd… \}}t |¡| _|| _dS )z.Override server_bind to store the server name.Né )Ú socketserverÚ TCPServerÚ server_bindZserver_addressÚsocketZgetfqdnÚ server_nameÚ server_port)ÚselfÚhostÚport© r ú#/usr/lib64/python3.8/http/server.pyr
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Z'dBdC„ Z(dDZ)e*j+j,Z-dEd!„ e.j/ 0¡ D ƒZ1dS )Kr a¿ 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
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" or "HTTP/1.1".
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
(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.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
where is the protocol version ("HTTP/1.0" or "HTTP/1.1"),
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 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 email.message.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,
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zPython/r z BaseHTTP/úHTTP/0.9c
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|
¡ d krð| jdkrð| jdkrð| ¡ sðdS dS ) aH 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, any relevant
error response has already been sent back.
NTz
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z$BaseHTTPRequestHandler.parse_requestc C s | tj¡ | ¡ dS )a7 Decide what to do with an "Expect: 100-continue" header.
If the client is expecting a 100 Continue response, we must
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waiting for the request body. The default is to always respond
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z)BaseHTTPRequestHandler.handle_one_requestc C s" d| _ | ¡ | j s | ¡ qdS )z&Handle multiple requests if necessary.TN)r% rL rB r r r Úhandle¯ s z BaseHTTPRequestHandler.handleNc C s z| j | \}}W n tk
r. d\}}Y nX |dkr<|}|dkrH|}| d||¡ | ||¡ | dd¡ d}|dkrâ|tjtjtjfkrâ| j |t
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tt|ƒƒ¡ | ¡ | jdkr|r| j |¡ dS )ak Send and log an error reply.
Arguments are
* code: an HTTP error code
3 digits
* message: a simple optional 1 line reason phrase.
*( HTAB / SP / VCHAR / %x80-FF )
defaults to short entry matching the response code
* explain: a detailed message defaults to the long entry
matching the response code.
This sends an error response (so it must be called before any
output has been generated), logs the error, and finally sends
a piece of HTML explaining the error to the user.
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ZServerZDateN)Ú log_requestr@ rZ Úversion_stringÚdate_time_string©r rR rS r r r rY ì s
z$BaseHTTPRequestHandler.send_responsec C sd | j dkr`|dkr0|| jkr,| j| d }nd}t| dƒs@g | _| j d| j||f dd¡¡ dS ) z Send the response header only.r Nr r Ú_headers_bufferz
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z"BaseHTTPRequestHandler.end_headersc C s( t | dƒr$| j d | j¡¡ g | _d S )Nrf ó )rD rG ra Újoinrf rB r r r rl s
z$BaseHTTPRequestHandler.flush_headersú-c C s. t |tƒr|j}| d| jt|ƒt|ƒ¡ dS )zNLog an accepted request.
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N)rq )r ÚformatÚargsr r r rI + s z BaseHTTPRequestHandler.log_errorc C s i | ]}|d |d›“qS )z\xZ02xr )Ú.0Úcr r r Ú
; s z!BaseHTTPRequestHandler.é é é z\\ú\c G s2 || }t j d| ¡ | ¡ | | j¡f ¡ dS )aZ Log an arbitrary message.
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it if you have specific logging wishes.
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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!).
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z%s - - [%s] %s
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þÿz"BaseHTTPRequestHandler.log_messagec C s | j d | j S )z*Return the server software version string.ú )Úserver_versionÚ sys_versionrB r r r rc X s z%BaseHTTPRequestHandler.version_stringc C s |dkrt ¡ }tjj|ddS )z@Return the current date and time formatted for a message header.NT)Zusegmt)ÚtimeÚemailÚutilsZ
formatdate)r Z timestampr r r rd \ s z'BaseHTTPRequestHandler.date_time_stringc C sB t ¡ }t |¡\ }}}}}}}} }
d|| j| ||||f } | S )z.Return the current time formatted for logging.z %02d/%3s/%04d %02d:%02d:%02d)r… Ú localtimeÚ monthname) r ZnowZyearZmonthZdayZhhZmmZssÚxÚyÚzÚsr r r r b s ÿz+BaseHTTPRequestHandler.log_date_time_stringZMonZTueZWedZThuZFriZSatZSunZJanZFebZMarZAprZMayZJunZJulZAugZSepZOctZNovZDecc C s
| j d S )zReturn the client address.r )Úclient_addressrB r r r r~ p s z%BaseHTTPRequestHandler.address_stringúHTTP/1.0c C s i | ]}||j |jf“qS r )ÚphraseZ description)ru Úvr r r rw s ÿ )NN)N)N)ro ro )N)2r r r Ú__doc__r| r< r* r„ Ú __version__rƒ ÚDEFAULT_ERROR_MESSAGEr\ ÚDEFAULT_ERROR_CONTENT_TYPEr` r# r? r; rL rM r0 rY r@ rZ rA rl rb rI r& Ú maketransÚ itertoolsÚchainÚranger Úordrq rc rd r Z weekdaynamer‰ r~ r1 r4 r5 Z HTTPMessager7 r Ú __members__ÚvaluesrW r r r r r • s^ gj%
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ejsle ¡ ej ¡ Ze dddddœ¡ ‡ ZS )r aW Simple HTTP request handler with GET and HEAD commands.
This serves files from the current directory and any of its
subdirectories. The MIME type for files is determined by
calling the .guess_type() method.
The GET and HEAD requests are identical except that the HEAD
request omits the actual contents of the file.
z SimpleHTTP/N©Ú directoryc s( |d krt ¡ }|| _tƒ j||Ž d S ©N)ÚosÚgetcwdrž ÚsuperÚ__init__)r rž rt Úkwargs©Ú __class__r r r£ ” s z!SimpleHTTPRequestHandler.__init__c C s. | ¡ }|r*z| || j¡ W 5 | ¡ X dS )zServe a GET request.N)Ú send_headr ÚcopyfilerG ©r Úfr r r Údo_GETš s
z SimpleHTTPRequestHandler.do_GETc C s | ¡ }|r| ¡ dS )zServe a HEAD request.N)r§ r r© r r r Údo_HEAD£ s z SimpleHTTPRequestHandler.do_HEADc C s^ | | j¡}d}tj |¡rÂtj | j¡}|j d¡sŒ| t j
¡ |d |d |d d |d |d f}tj |¡}| d|¡ |
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¡ |W S | (¡ ‚ Y nX dS )a{ Common code for GET and HEAD commands.
This sends the response code and MIME headers.
Return value is either a file object (which has to be copied
to the outputfile by the caller unless the command was HEAD,
and must be closed by the caller under all circumstances), or
None, in which case the caller has nothing further to do.
Nr r r r
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| dd f ¡ qì| d¡ d |¡ |d¡} t ¡ } | | ¡ | d¡ | tj¡ | dd| ¡ | dt t | ƒƒ¡ | ¡ | S )zûHelper to produce a directory listing (absent index.html).
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error). In either case, the headers are sent, making the
interface the same as for send_head().
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z'SimpleHTTPRequestHandler.list_directoryc C sÎ | dd¡d }| dd¡d }| ¡ d¡}ztjj|dd}W n tk
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|¡sŒ|t jt jfkr®qŒt j ||¡}qŒ|rÊ|d7 }|S ) zñTranslate a /-separated PATH to the local filename syntax.
Components that mean special things to the local file system
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z'SimpleHTTPRequestHandler.translate_pathc C s t ||¡ dS )añ Copy all data between two file objects.
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The only reason for overriding this would be to change
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to copy binary data as well.
N)ÚshutilZ copyfileobj)r ÚsourceZ
outputfiler r r r¨ X s z!SimpleHTTPRequestHandler.copyfilec C sL t |¡\}}|| jkr"| j| S | ¡ }|| jkr>| j| S | jd S dS )a» Guess the type of a file.
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usable for a MIME Content-type header.
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as a default; however it would be permissible (if
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Given a URL path, remove extra '/'s and '.' path elements and collapse
any '..' references and returns a collapsed path.
Implements something akin to RFC-2396 5.2 step 6 to parse relative paths.
The utility of this function is limited to is_cgi method and helps
preventing some security attacks.
Returns: The reconstituted URL, which will always start with a '/'.
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