3
0f @ s d Z dZddddgZddlZddlZddlZddlZddl Z ddl
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d de Z dd Z da dd Z dd Z!G dd de Z"e edddfddZ#e$dkrej% Z&e&j'dd d d e&j'd d dd!d"d# e&j'd$d%de(d&d'd( e&j) Z*e*j+r~e"Z,ne Z,e#e,e*j-e*j.d) dS )*a@ HTTP server classes.
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
z0.6
HTTPServerBaseHTTPRequestHandlerSimpleHTTPRequestHandlerCGIHTTPRequestHandler N)
HTTPStatusa
Error response
Error response
Error code: %(code)d
Message: %(message)s.
Error code explanation: %(code)s - %(explain)s.
ztext/html;charset=utf-8c @ s e Zd ZdZdd ZdS )r c C s4 t jj| | jdd \}}tj|| _|| _dS )z.Override server_bind to store the server name.N ) socketserver TCPServer server_bindserver_addresssocketZgetfqdn server_name server_port)selfhostport r /usr/lib64/python3.6/server.pyr s zHTTPServer.server_bindN)__name__
__module__ __qualname__Zallow_reuse_addressr r r r r r s c
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Zd@ddZdAddZdBddZdd Zdd Zdd ZdCd d Zd d Zd d! Zd"d# Z dDd$d%Z d&d' Z d(d)d*d+d,d-d.gZ dd/d0d1d2d3d4d5d6d7d8d9d:g
Z d;d< Z!d=Z"e#j$j%Z&d>d? e'j(j) D Z*dS )Er 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,
e.g. "text/html" or "text/plain".
zPython/r z BaseHTTP/zHTTP/0.9c C s d| _ | j | _}d| _t| jd}|jd}|| _|j }t |dkr|\}}}yZ|dd dkrjt
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|
j d kr| jdkr| jdkr| j sdS dS ) a' 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.
NTz
iso-8859-1z
zHTTP//r .r r zBad request version (%r)FzHTTP/1.1zInvalid HTTP version (%s)ZGETz Bad HTTP/0.9 request type (%r)zBad request syntax (%r)z//)Z_classz
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z$BaseHTTPRequestHandler.parse_requestc C s | j tj | j dS )a7 Decide what to do with an "Expect: 100-continue" header.
If the client is expecting a 100 Continue response, we must
respond with either a 100 Continue or a final response before
waiting for the request body. The default is to always respond
with a 100 Continue. You can behave differently (for example,
reject unauthorized requests) by overriding this method.
This method should either return True (possibly after sending
a 100 Continue response) or send an error response and return
False.
T)send_response_onlyr ZCONTINUE end_headers)r r r r r8 n s z(BaseHTTPRequestHandler.handle_expect_100c C s y| j jd| _t| jdkr@d| _d| _d| _| jtj dS | jsPd| _
dS | j s\dS d| j }t | |s| jtj
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dS d}~X nX dS ) zHandle a single HTTP request.
You normally don't need to override this method; see the class
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i i r NTZdo_zUnsupported method (%r)zRequest timed out: %r)r3 readliner$ r( r& r! r r, r ZREQUEST_URI_TOO_LONGr" r= hasattrNOT_IMPLEMENTEDgetattrwfileflushr
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y| j | \}}W n tk
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tt| | j | jdko|r| jj| 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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z!BaseHTTPRequestHandler.send_errorc C s: | j | | j|| | jd| j | jd| j dS )zAdd the response header to the headers buffer and log the
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version and the current date.
ZServerZDateN) log_requestr> rU version_stringdate_time_string)r rN rO r r r rT s
z$BaseHTTPRequestHandler.send_responsec C sd | j dkr`|dkr0|| jkr,| j| d }nd}t| ds@g | _| jjd| j||f jdd dS ) z Send the response header only.zHTTP/0.9Nr r _headers_bufferz
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z)BaseHTTPRequestHandler.send_response_onlyc C sl | j dkr6t| dsg | _| jjd||f jdd |j dkrh|j dkrVd| _n|j d krhd
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z"BaseHTTPRequestHandler.send_headerc C s" | j dkr | jjd | j dS )z,Send the blank line ending the MIME headers.zHTTP/0.9s
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z"BaseHTTPRequestHandler.end_headersc C s( t | dr$| jjdj| j g | _d S )Nr_ )rA rD r[ joinr_ )r r r r rd s
z$BaseHTTPRequestHandler.flush_headers-c C s. t |tr|j}| jd| jt|t| dS )zNLog an accepted request.
This is called by send_response().
z
"%s" %s %sN)
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z"BaseHTTPRequestHandler.log_requestc G s | j |f| dS )zLog an error.
This is called when a request cannot be fulfilled. By
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XXX This should go to the separate error log.
N)ri )r formatargsr r r rF ! s z BaseHTTPRequestHandler.log_errorc G s& t jjd| j | j || f dS )a 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 and current date/time are prefixed to
every message.
z%s - - [%s] %s
N)sysstderrr[ address_stringlog_date_time_string)r rk rl r r r ri / s z"BaseHTTPRequestHandler.log_messagec C s | j d | j S )z*Return the server software version string. )server_version sys_version)r r r r r] E s z%BaseHTTPRequestHandler.version_stringc C s |dkrt j }tjj|ddS )z@Return the current date and time formatted for a message header.NT)Zusegmt)timeemailZutilsZ
formatdate)r Z timestampr r r r^ I s z'BaseHTTPRequestHandler.date_time_stringc C sB t j }t j|\ }}}}}}}} }
d|| j| ||||f } | S )z.Return the current time formatted for logging.z %02d/%3s/%04d %02d:%02d:%02d)rt Z localtime monthname) r ZnowZyearZmonthZdayZhhZmmZssxyzsr r r rp O s
z+BaseHTTPRequestHandler.log_date_time_stringZMonZTueZWedZThuZFriZSatZSunZJanZFebZMarZAprZMayZJunZJulZAugZSepZOctZNovZDecc C s
| j d S )zReturn the client address.r )client_address)r r r r ro ] s z%BaseHTTPRequestHandler.address_stringzHTTP/1.0c C s i | ]}|j |jf|qS r )phrase description).0vr r r
l s z!BaseHTTPRequestHandler.)NN)N)N)rg rg )N)+r r r __doc__rm r9 r' rs __version__rr DEFAULT_ERROR_MESSAGErV DEFAULT_ERROR_CONTENT_TYPErZ r r= r8 rI rJ r, rT r> rU r? rd r\ rF ri r] r^ rp Z weekdaynamerv ro r- r1 r2 Z HTTPMessager4 r __members__valuesrR r r r r r s> fg%
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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/c
C s. | j }|r*z| j|| j W d|j X dS )zServe a GET request.N) send_headcopyfilerD r )r fr r r do_GET s
z SimpleHTTPRequestHandler.do_GETc C s | j }|r|j dS )zServe a HEAD request.N)r r )r r r r r do_HEAD s z SimpleHTTPRequestHandler.do_HEADc C sx | j | j}d}tjj|rtjj| j}|jjds| jt j
|d |d |d d |d |d f}tjj |}| j d| | j
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|S |j 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 r ZLocation
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z"SimpleHTTPRequestHandler.send_headc
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| dd f qW |jd dj|j|d} tj } | j| | jd | jtj | j dd| | j dt t | | j | S )zHelper to produce a directory listing (absent index.html).
Return value is either a file object, or None (indicating an
error). In either case, the headers are sent, making the
interface the same as for send_head().
z No permission to list directoryNc S s | j S )N)r7 )ar r r s z9SimpleHTTPRequestHandler.list_directory..)key
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surrogateescaper z Content-typeztext/html; charset=%szContent-Length) r listdirr r, r r sortr r unquoter. UnicodeDecodeErrorrW rX rm getfilesystemencodingra rf r islinkrM rY ioBytesIOr[ seekrT r rU r# r( r? )
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z'SimpleHTTPRequestHandler.list_directoryc C s |j ddd }|j ddd }|j jd}ytjj|dd}W n tk
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j j||}qW |r|d7 }|S ) zTranslate a /-separated PATH to the local filename syntax.
Components that mean special things to the local file system
(e.g. drive or directory names) are ignored. (XXX They should
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?r r #r r )r N)r' r% r r r r r posixpathnormpathfilterr getcwdr. dirnamecurdirpardirrf )r r. Ztrailing_slashr: Zwordr r r r s$
z'SimpleHTTPRequestHandler.translate_pathc C s t j|| dS )a Copy all data between two file objects.
The SOURCE argument is a file object open for reading
(or anything with a read() method) and the DESTINATION
argument is a file object open for writing (or
anything with a write() method).
The only reason for overriding this would be to change
the block size or perhaps to replace newlines by CRLF
-- note however that this the default server uses this
to copy binary data as well.
N)shutilZ copyfileobj)r sourceZ
outputfiler r r r s z!SimpleHTTPRequestHandler.copyfilec C sL t j|\}}|| jkr"| j| S |j }|| jkr>| j| S | jd S dS )a Guess the type of a file.
Argument is a PATH (a filename).
Return value is a string of the form type/subtype,
usable for a MIME Content-type header.
The default implementation looks the file's extension
up in the table self.extensions_map, using application/octet-stream
as a default; however it would be permissible (if
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c C s | j d\} }}tjj| } | jd}g }x<|dd D ],}|dkrN|j q8|r8|dkr8|j| q8W |r|j }|r|dkr|j d}q|dkrd}nd}|rdj||f}ddj| |f}dj|}|S ) a
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 '/'.
Raises: IndexError if too many '..' occur within the path.
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rj dtdd | j D a Y nX t S ) z$Internal routine to get nobody's uidr Nr nobodyr c s s | ]}|d V qdS )r Nr )r~ rw r r r s z nobody_uid..r )r pwd ImportErrorgetpwnamrS maxZgetpwall)r r r r
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z Can only POST to CGI scriptsN)is_cgirun_cgir, r rB )r r r r do_POST s
z CGIHTTPRequestHandler.do_POSTc C s | j r| j S tj| S dS )z-Version of send_head that support CGI scriptsN)r r r r )r r r r r s z CGIHTTPRequestHandler.send_headc C sP t | j}|jdd}|d| ||d d }}|| jkrL||f| _dS dS )a3 Test whether self.path corresponds to a CGI script.
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(dir, rest) if self.path requires running a CGI script.
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self.path was rejected as invalid and act accordingly.
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