| """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 |
| """ |
| |
| |
| # See also: |
| # |
| # HTTP Working Group T. Berners-Lee |
| # INTERNET-DRAFT R. T. Fielding |
| # <draft-ietf-http-v10-spec-00.txt> H. Frystyk Nielsen |
| # Expires September 8, 1995 March 8, 1995 |
| # |
| # URL: http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-v10-spec-00.txt |
| # |
| # and |
| # |
| # Network Working Group R. Fielding |
| # Request for Comments: 2616 et al |
| # Obsoletes: 2068 June 1999 |
| # Category: Standards Track |
| # |
| # URL: http://www.faqs.org/rfcs/rfc2616.html |
| |
| # Log files |
| # --------- |
| # |
| # Here's a quote from the NCSA httpd docs about log file format. |
| # |
| # | The logfile format is as follows. Each line consists of: |
| # | |
| # | host rfc931 authuser [DD/Mon/YYYY:hh:mm:ss] "request" ddd bbbb |
| # | |
| # | host: Either the DNS name or the IP number of the remote client |
| # | rfc931: Any information returned by identd for this person, |
| # | - otherwise. |
| # | authuser: If user sent a userid for authentication, the user name, |
| # | - otherwise. |
| # | DD: Day |
| # | Mon: Month (calendar name) |
| # | YYYY: Year |
| # | hh: hour (24-hour format, the machine's timezone) |
| # | mm: minutes |
| # | ss: seconds |
| # | request: The first line of the HTTP request as sent by the client. |
| # | ddd: the status code returned by the server, - if not available. |
| # | bbbb: the total number of bytes sent, |
| # | *not including the HTTP/1.0 header*, - if not available |
| # | |
| # | You can determine the name of the file accessed through request. |
| # |
| # (Actually, the latter is only true if you know the server configuration |
| # at the time the request was made!) |
| |
| __version__ = "0.6" |
| |
| __all__ = ["HTTPServer", "BaseHTTPRequestHandler"] |
| |
| import cgi |
| import email.message |
| import email.parser |
| import http.client |
| import io |
| import mimetypes |
| import os |
| import posixpath |
| import select |
| import shutil |
| import socket # For gethostbyaddr() |
| import socketserver |
| import sys |
| import time |
| import urllib.parse |
| |
| # Default error message template |
| DEFAULT_ERROR_MESSAGE = """\ |
| <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> |
| """ |
| |
| DEFAULT_ERROR_CONTENT_TYPE = "text/html;charset=utf-8" |
| |
| def _quote_html(html): |
| return html.replace("&", "&").replace("<", "<").replace(">", ">") |
| |
| class HTTPServer(socketserver.TCPServer): |
| |
| allow_reuse_address = 1 # Seems to make sense in testing environment |
| |
| def server_bind(self): |
| """Override server_bind to store the server name.""" |
| socketserver.TCPServer.server_bind(self) |
| host, port = self.socket.getsockname()[:2] |
| self.server_name = socket.getfqdn(host) |
| self.server_port = port |
| |
| |
| class BaseHTTPRequestHandler(socketserver.StreamRequestHandler): |
| |
| """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 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: <type>/<subtype> |
| |
| where <type> and <subtype> should be registered MIME types, |
| e.g. "text/html" or "text/plain". |
| |
| """ |
| |
| # The Python system version, truncated to its first component. |
| sys_version = "Python/" + sys.version.split()[0] |
| |
| # The server software version. You may want to override this. |
| # The format is multiple whitespace-separated strings, |
| # where each string is of the form name[/version]. |
| server_version = "BaseHTTP/" + __version__ |
| |
| error_message_format = DEFAULT_ERROR_MESSAGE |
| error_content_type = DEFAULT_ERROR_CONTENT_TYPE |
| |
| # The default request version. This only affects responses up until |
| # the point where the request line is parsed, so it mainly decides what |
| # the client gets back when sending a malformed request line. |
| # Most web servers default to HTTP 0.9, i.e. don't send a status line. |
| default_request_version = "HTTP/0.9" |
| |
| def parse_request(self): |
| """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. |
| |
| """ |
| self.command = None # set in case of error on the first line |
| self.request_version = version = self.default_request_version |
| self.close_connection = 1 |
| requestline = str(self.raw_requestline, 'iso-8859-1') |
| if requestline[-2:] == '\r\n': |
| requestline = requestline[:-2] |
| elif requestline[-1:] == '\n': |
| requestline = requestline[:-1] |
| self.requestline = requestline |
| words = requestline.split() |
| if len(words) == 3: |
| [command, path, version] = words |
| if version[:5] != 'HTTP/': |
| self.send_error(400, "Bad request version (%r)" % version) |
| return False |
| try: |
| base_version_number = version.split('/', 1)[1] |
| version_number = base_version_number.split(".") |
| # RFC 2145 section 3.1 says there can be only one "." and |
| # - major and minor numbers MUST be treated as |
| # separate integers; |
| # - HTTP/2.4 is a lower version than HTTP/2.13, which in |
| # turn is lower than HTTP/12.3; |
| # - Leading zeros MUST be ignored by recipients. |
| if len(version_number) != 2: |
| raise ValueError |
| version_number = int(version_number[0]), int(version_number[1]) |
| except (ValueError, IndexError): |
| self.send_error(400, "Bad request version (%r)" % version) |
| return False |
| if version_number >= (1, 1) and self.protocol_version >= "HTTP/1.1": |
| self.close_connection = 0 |
| if version_number >= (2, 0): |
| self.send_error(505, |
| "Invalid HTTP Version (%s)" % base_version_number) |
| return False |
| elif len(words) == 2: |
| [command, path] = words |
| self.close_connection = 1 |
| if command != 'GET': |
| self.send_error(400, |
| "Bad HTTP/0.9 request type (%r)" % command) |
| return False |
| elif not words: |
| return False |
| else: |
| self.send_error(400, "Bad request syntax (%r)" % requestline) |
| return False |
| self.command, self.path, self.request_version = command, path, version |
| |
| # Examine the headers and look for a Connection directive. |
| self.headers = http.client.parse_headers(self.rfile, |
| _class=self.MessageClass) |
| |
| conntype = self.headers.get('Connection', "") |
| if conntype.lower() == 'close': |
| self.close_connection = 1 |
| elif (conntype.lower() == 'keep-alive' and |
| self.protocol_version >= "HTTP/1.1"): |
| self.close_connection = 0 |
| return True |
| |
| def handle_one_request(self): |
| """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. |
| |
| """ |
| self.raw_requestline = self.rfile.readline() |
| if not self.raw_requestline: |
| self.close_connection = 1 |
| return |
| if not self.parse_request(): # An error code has been sent, just exit |
| return |
| mname = 'do_' + self.command |
| if not hasattr(self, mname): |
| self.send_error(501, "Unsupported method (%r)" % self.command) |
| return |
| method = getattr(self, mname) |
| method() |
| |
| def handle(self): |
| """Handle multiple requests if necessary.""" |
| self.close_connection = 1 |
| |
| self.handle_one_request() |
| while not self.close_connection: |
| self.handle_one_request() |
| |
| def send_error(self, code, message=None): |
| """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. |
| |
| """ |
| |
| try: |
| shortmsg, longmsg = self.responses[code] |
| except KeyError: |
| shortmsg, longmsg = '???', '???' |
| if message is None: |
| message = shortmsg |
| explain = longmsg |
| self.log_error("code %d, message %s", code, message) |
| # using _quote_html to prevent Cross Site Scripting attacks (see bug #1100201) |
| content = (self.error_message_format % |
| {'code': code, 'message': _quote_html(message), 'explain': explain}) |
| self.send_response(code, message) |
| self.send_header("Content-Type", self.error_content_type) |
| self.send_header('Connection', 'close') |
| self.end_headers() |
| if self.command != 'HEAD' and code >= 200 and code not in (204, 304): |
| self.wfile.write(content.encode('UTF-8', 'replace')) |
| |
| def send_response(self, code, message=None): |
| """Send the response header and log the response code. |
| |
| Also send two standard headers with the server software |
| version and the current date. |
| |
| """ |
| self.log_request(code) |
| if message is None: |
| if code in self.responses: |
| message = self.responses[code][0] |
| else: |
| message = '' |
| if self.request_version != 'HTTP/0.9': |
| self.wfile.write(("%s %d %s\r\n" % |
| (self.protocol_version, code, message)).encode('ASCII', 'strict')) |
| # print (self.protocol_version, code, message) |
| self.send_header('Server', self.version_string()) |
| self.send_header('Date', self.date_time_string()) |
| |
| def send_header(self, keyword, value): |
| """Send a MIME header.""" |
| if self.request_version != 'HTTP/0.9': |
| self.wfile.write(("%s: %s\r\n" % (keyword, value)).encode('ASCII', 'strict')) |
| |
| if keyword.lower() == 'connection': |
| if value.lower() == 'close': |
| self.close_connection = 1 |
| elif value.lower() == 'keep-alive': |
| self.close_connection = 0 |
| |
| def end_headers(self): |
| """Send the blank line ending the MIME headers.""" |
| if self.request_version != 'HTTP/0.9': |
| self.wfile.write(b"\r\n") |
| |
| def log_request(self, code='-', size='-'): |
| """Log an accepted request. |
| |
| This is called by send_response(). |
| |
| """ |
| |
| self.log_message('"%s" %s %s', |
| self.requestline, str(code), str(size)) |
| |
| def log_error(self, format, *args): |
| """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. |
| |
| """ |
| |
| self.log_message(format, *args) |
| |
| def log_message(self, format, *args): |
| """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. |
| |
| """ |
| |
| sys.stderr.write("%s - - [%s] %s\n" % |
| (self.address_string(), |
| self.log_date_time_string(), |
| format%args)) |
| |
| def version_string(self): |
| """Return the server software version string.""" |
| return self.server_version + ' ' + self.sys_version |
| |
| def date_time_string(self, timestamp=None): |
| """Return the current date and time formatted for a message header.""" |
| if timestamp is None: |
| timestamp = time.time() |
| year, month, day, hh, mm, ss, wd, y, z = time.gmtime(timestamp) |
| s = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % ( |
| self.weekdayname[wd], |
| day, self.monthname[month], year, |
| hh, mm, ss) |
| return s |
| |
| def log_date_time_string(self): |
| """Return the current time formatted for logging.""" |
| now = time.time() |
| year, month, day, hh, mm, ss, x, y, z = time.localtime(now) |
| s = "%02d/%3s/%04d %02d:%02d:%02d" % ( |
| day, self.monthname[month], year, hh, mm, ss) |
| return s |
| |
| weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] |
| |
| monthname = [None, |
| 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', |
| 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] |
| |
| def address_string(self): |
| """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. |
| |
| """ |
| |
| host, port = self.client_address[:2] |
| return socket.getfqdn(host) |
| |
| # Essentially static class variables |
| |
| # The version of the HTTP protocol we support. |
| # Set this to HTTP/1.1 to enable automatic keepalive |
| protocol_version = "HTTP/1.0" |
| |
| # MessageClass used to parse headers |
| MessageClass = http.client.HTTPMessage |
| |
| # Table mapping response codes to messages; entries have the |
| # form {code: (shortmessage, longmessage)}. |
| # See RFC 2616. |
| responses = { |
| 100: ('Continue', 'Request received, please continue'), |
| 101: ('Switching Protocols', |
| 'Switching to new protocol; obey Upgrade header'), |
| |
| 200: ('OK', 'Request fulfilled, document follows'), |
| 201: ('Created', 'Document created, URL follows'), |
| 202: ('Accepted', |
| 'Request accepted, processing continues off-line'), |
| 203: ('Non-Authoritative Information', 'Request fulfilled from cache'), |
| 204: ('No Content', 'Request fulfilled, nothing follows'), |
| 205: ('Reset Content', 'Clear input form for further input.'), |
| 206: ('Partial Content', 'Partial content follows.'), |
| |
| 300: ('Multiple Choices', |
| 'Object has several resources -- see URI list'), |
| 301: ('Moved Permanently', 'Object moved permanently -- see URI list'), |
| 302: ('Found', 'Object moved temporarily -- see URI list'), |
| 303: ('See Other', 'Object moved -- see Method and URL list'), |
| 304: ('Not Modified', |
| 'Document has not changed since given time'), |
| 305: ('Use Proxy', |
| 'You must use proxy specified in Location to access this ' |
| 'resource.'), |
| 307: ('Temporary Redirect', |
| 'Object moved temporarily -- see URI list'), |
| |
| 400: ('Bad Request', |
| 'Bad request syntax or unsupported method'), |
| 401: ('Unauthorized', |
| 'No permission -- see authorization schemes'), |
| 402: ('Payment Required', |
| 'No payment -- see charging schemes'), |
| 403: ('Forbidden', |
| 'Request forbidden -- authorization will not help'), |
| 404: ('Not Found', 'Nothing matches the given URI'), |
| 405: ('Method Not Allowed', |
| 'Specified method is invalid for this resource.'), |
| 406: ('Not Acceptable', 'URI not available in preferred format.'), |
| 407: ('Proxy Authentication Required', 'You must authenticate with ' |
| 'this proxy before proceeding.'), |
| 408: ('Request Timeout', 'Request timed out; try again later.'), |
| 409: ('Conflict', 'Request conflict.'), |
| 410: ('Gone', |
| 'URI no longer exists and has been permanently removed.'), |
| 411: ('Length Required', 'Client must specify Content-Length.'), |
| 412: ('Precondition Failed', 'Precondition in headers is false.'), |
| 413: ('Request Entity Too Large', 'Entity is too large.'), |
| 414: ('Request-URI Too Long', 'URI is too long.'), |
| 415: ('Unsupported Media Type', 'Entity body in unsupported format.'), |
| 416: ('Requested Range Not Satisfiable', |
| 'Cannot satisfy request range.'), |
| 417: ('Expectation Failed', |
| 'Expect condition could not be satisfied.'), |
| |
| 500: ('Internal Server Error', 'Server got itself in trouble'), |
| 501: ('Not Implemented', |
| 'Server does not support this operation'), |
| 502: ('Bad Gateway', 'Invalid responses from another server/proxy.'), |
| 503: ('Service Unavailable', |
| 'The server cannot process the request due to a high load'), |
| 504: ('Gateway Timeout', |
| 'The gateway server did not receive a timely response'), |
| 505: ('HTTP Version Not Supported', 'Cannot fulfill request.'), |
| } |
| |
| |
| class SimpleHTTPRequestHandler(BaseHTTPRequestHandler): |
| |
| """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. |
| |
| """ |
| |
| server_version = "SimpleHTTP/" + __version__ |
| |
| def do_GET(self): |
| """Serve a GET request.""" |
| f = self.send_head() |
| if f: |
| self.copyfile(f, self.wfile) |
| f.close() |
| |
| def do_HEAD(self): |
| """Serve a HEAD request.""" |
| f = self.send_head() |
| if f: |
| f.close() |
| |
| def send_head(self): |
| """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. |
| |
| """ |
| path = self.translate_path(self.path) |
| f = None |
| if os.path.isdir(path): |
| if not self.path.endswith('/'): |
| # redirect browser - doing basically what apache does |
| self.send_response(301) |
| self.send_header("Location", self.path + "/") |
| self.end_headers() |
| return None |
| for index in "index.html", "index.htm": |
| index = os.path.join(path, index) |
| if os.path.exists(index): |
| path = index |
| break |
| else: |
| return self.list_directory(path) |
| ctype = self.guess_type(path) |
| try: |
| f = open(path, 'rb') |
| except IOError: |
| self.send_error(404, "File not found") |
| return None |
| self.send_response(200) |
| self.send_header("Content-type", ctype) |
| fs = os.fstat(f.fileno()) |
| self.send_header("Content-Length", str(fs[6])) |
| self.send_header("Last-Modified", self.date_time_string(fs.st_mtime)) |
| self.end_headers() |
| return f |
| |
| def list_directory(self, path): |
| """Helper 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(). |
| |
| """ |
| try: |
| list = os.listdir(path) |
| except os.error: |
| self.send_error(404, "No permission to list directory") |
| return None |
| list.sort(key=lambda a: a.lower()) |
| r = [] |
| displaypath = cgi.escape(urllib.parse.unquote(self.path)) |
| r.append('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">') |
| r.append("<html>\n<title>Directory listing for %s</title>\n" % displaypath) |
| r.append("<body>\n<h2>Directory listing for %s</h2>\n" % displaypath) |
| r.append("<hr>\n<ul>\n") |
| for name in list: |
| fullname = os.path.join(path, name) |
| displayname = linkname = name |
| # Append / for directories or @ for symbolic links |
| if os.path.isdir(fullname): |
| displayname = name + "/" |
| linkname = name + "/" |
| if os.path.islink(fullname): |
| displayname = name + "@" |
| # Note: a link to a directory displays with @ and links with / |
| r.append('<li><a href="%s">%s</a>\n' |
| % (urllib.parse.quote(linkname), cgi.escape(displayname))) |
| r.append("</ul>\n<hr>\n</body>\n</html>\n") |
| enc = sys.getfilesystemencoding() |
| encoded = ''.join(r).encode(enc) |
| f = io.BytesIO() |
| f.write(encoded) |
| f.seek(0) |
| self.send_response(200) |
| self.send_header("Content-type", "text/html; charset=%s" % enc) |
| self.send_header("Content-Length", str(len(encoded))) |
| self.end_headers() |
| return f |
| |
| def translate_path(self, path): |
| """Translate 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 |
| probably be diagnosed.) |
| |
| """ |
| # abandon query parameters |
| path = path.split('?',1)[0] |
| path = path.split('#',1)[0] |
| path = posixpath.normpath(urllib.parse.unquote(path)) |
| words = path.split('/') |
| words = filter(None, words) |
| path = os.getcwd() |
| for word in words: |
| drive, word = os.path.splitdrive(word) |
| head, word = os.path.split(word) |
| if word in (os.curdir, os.pardir): continue |
| path = os.path.join(path, word) |
| return path |
| |
| def copyfile(self, source, outputfile): |
| """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. |
| |
| """ |
| shutil.copyfileobj(source, outputfile) |
| |
| def guess_type(self, path): |
| """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 |
| slow) to look inside the data to make a better guess. |
| |
| """ |
| |
| base, ext = posixpath.splitext(path) |
| if ext in self.extensions_map: |
| return self.extensions_map[ext] |
| ext = ext.lower() |
| if ext in self.extensions_map: |
| return self.extensions_map[ext] |
| else: |
| return self.extensions_map[''] |
| |
| if not mimetypes.inited: |
| mimetypes.init() # try to read system mime.types |
| extensions_map = mimetypes.types_map.copy() |
| extensions_map.update({ |
| '': 'application/octet-stream', # Default |
| '.py': 'text/plain', |
| '.c': 'text/plain', |
| '.h': 'text/plain', |
| }) |
| |
| |
| # Utilities for CGIHTTPRequestHandler |
| |
| # TODO(gregory.p.smith): Move this into an appropriate library. |
| def _url_collapse_path_split(path): |
| """ |
| Given a URL path, remove extra '/'s and '.' path elements and collapse |
| any '..' references. |
| |
| Implements something akin to RFC-2396 5.2 step 6 to parse relative paths. |
| |
| Returns: A tuple of (head, tail) where tail is everything after the final / |
| and head is everything before it. Head will always start with a '/' and, |
| if it contains anything else, never have a trailing '/'. |
| |
| Raises: IndexError if too many '..' occur within the path. |
| """ |
| # Similar to os.path.split(os.path.normpath(path)) but specific to URL |
| # path semantics rather than local operating system semantics. |
| path_parts = [] |
| for part in path.split('/'): |
| if part == '.': |
| path_parts.append('') |
| else: |
| path_parts.append(part) |
| # Filter out blank non trailing parts before consuming the '..'. |
| path_parts = [part for part in path_parts[:-1] if part] + path_parts[-1:] |
| if path_parts: |
| tail_part = path_parts.pop() |
| else: |
| tail_part = '' |
| head_parts = [] |
| for part in path_parts: |
| if part == '..': |
| head_parts.pop() |
| else: |
| head_parts.append(part) |
| if tail_part and tail_part == '..': |
| head_parts.pop() |
| tail_part = '' |
| return ('/' + '/'.join(head_parts), tail_part) |
| |
| |
| nobody = None |
| |
| def nobody_uid(): |
| """Internal routine to get nobody's uid""" |
| global nobody |
| if nobody: |
| return nobody |
| try: |
| import pwd |
| except ImportError: |
| return -1 |
| try: |
| nobody = pwd.getpwnam('nobody')[2] |
| except KeyError: |
| nobody = 1 + max(map(lambda x: x[2], pwd.getpwall())) |
| return nobody |
| |
| |
| def executable(path): |
| """Test for executable file.""" |
| try: |
| st = os.stat(path) |
| except os.error: |
| return False |
| return st.st_mode & 0o111 != 0 |
| |
| |
| class CGIHTTPRequestHandler(SimpleHTTPRequestHandler): |
| |
| """Complete HTTP server with GET, HEAD and POST commands. |
| |
| GET and HEAD also support running CGI scripts. |
| |
| The POST command is *only* implemented for CGI scripts. |
| |
| """ |
| |
| # Determine platform specifics |
| have_fork = hasattr(os, 'fork') |
| |
| # Make rfile unbuffered -- we need to read one line and then pass |
| # the rest to a subprocess, so we can't use buffered input. |
| rbufsize = 0 |
| |
| def do_POST(self): |
| """Serve a POST request. |
| |
| This is only implemented for CGI scripts. |
| |
| """ |
| |
| if self.is_cgi(): |
| self.run_cgi() |
| else: |
| self.send_error(501, "Can only POST to CGI scripts") |
| |
| def send_head(self): |
| """Version of send_head that support CGI scripts""" |
| if self.is_cgi(): |
| return self.run_cgi() |
| else: |
| return SimpleHTTPRequestHandler.send_head(self) |
| |
| def is_cgi(self): |
| """Test whether self.path corresponds to a CGI script. |
| |
| Returns True and updates the cgi_info attribute to the tuple |
| (dir, rest) if self.path requires running a CGI script. |
| Returns False otherwise. |
| |
| If any exception is raised, the caller should assume that |
| self.path was rejected as invalid and act accordingly. |
| |
| The default implementation tests whether the normalized url |
| path begins with one of the strings in self.cgi_directories |
| (and the next character is a '/' or the end of the string). |
| |
| """ |
| |
| splitpath = _url_collapse_path_split(self.path) |
| if splitpath[0] in self.cgi_directories: |
| self.cgi_info = splitpath |
| return True |
| return False |
| |
| cgi_directories = ['/cgi-bin', '/htbin'] |
| |
| def is_executable(self, path): |
| """Test whether argument path is an executable file.""" |
| return executable(path) |
| |
| def is_python(self, path): |
| """Test whether argument path is a Python script.""" |
| head, tail = os.path.splitext(path) |
| return tail.lower() in (".py", ".pyw") |
| |
| def run_cgi(self): |
| """Execute a CGI script.""" |
| path = self.path |
| dir, rest = self.cgi_info |
| |
| i = path.find('/', len(dir) + 1) |
| while i >= 0: |
| nextdir = path[:i] |
| nextrest = path[i+1:] |
| |
| scriptdir = self.translate_path(nextdir) |
| if os.path.isdir(scriptdir): |
| dir, rest = nextdir, nextrest |
| i = path.find('/', len(dir) + 1) |
| else: |
| break |
| |
| # find an explicit query string, if present. |
| i = rest.rfind('?') |
| if i >= 0: |
| rest, query = rest[:i], rest[i+1:] |
| else: |
| query = '' |
| |
| # dissect the part after the directory name into a script name & |
| # a possible additional path, to be stored in PATH_INFO. |
| i = rest.find('/') |
| if i >= 0: |
| script, rest = rest[:i], rest[i:] |
| else: |
| script, rest = rest, '' |
| |
| scriptname = dir + '/' + script |
| scriptfile = self.translate_path(scriptname) |
| if not os.path.exists(scriptfile): |
| self.send_error(404, "No such CGI script (%r)" % scriptname) |
| return |
| if not os.path.isfile(scriptfile): |
| self.send_error(403, "CGI script is not a plain file (%r)" % |
| scriptname) |
| return |
| ispy = self.is_python(scriptname) |
| if not ispy: |
| if not self.is_executable(scriptfile): |
| self.send_error(403, "CGI script is not executable (%r)" % |
| scriptname) |
| return |
| |
| # Reference: http://hoohoo.ncsa.uiuc.edu/cgi/env.html |
| # XXX Much of the following could be prepared ahead of time! |
| env = {} |
| env['SERVER_SOFTWARE'] = self.version_string() |
| env['SERVER_NAME'] = self.server.server_name |
| env['GATEWAY_INTERFACE'] = 'CGI/1.1' |
| env['SERVER_PROTOCOL'] = self.protocol_version |
| env['SERVER_PORT'] = str(self.server.server_port) |
| env['REQUEST_METHOD'] = self.command |
| uqrest = urllib.parse.unquote(rest) |
| env['PATH_INFO'] = uqrest |
| env['PATH_TRANSLATED'] = self.translate_path(uqrest) |
| env['SCRIPT_NAME'] = scriptname |
| if query: |
| env['QUERY_STRING'] = query |
| host = self.address_string() |
| if host != self.client_address[0]: |
| env['REMOTE_HOST'] = host |
| env['REMOTE_ADDR'] = self.client_address[0] |
| authorization = self.headers.get("authorization") |
| if authorization: |
| authorization = authorization.split() |
| if len(authorization) == 2: |
| import base64, binascii |
| env['AUTH_TYPE'] = authorization[0] |
| if authorization[0].lower() == "basic": |
| try: |
| authorization = authorization[1].encode('ascii') |
| authorization = base64.decodebytes(authorization).\ |
| decode('ascii') |
| except (binascii.Error, UnicodeError): |
| pass |
| else: |
| authorization = authorization.split(':') |
| if len(authorization) == 2: |
| env['REMOTE_USER'] = authorization[0] |
| # XXX REMOTE_IDENT |
| if self.headers.get('content-type') is None: |
| env['CONTENT_TYPE'] = self.headers.get_content_type() |
| else: |
| env['CONTENT_TYPE'] = self.headers['content-type'] |
| length = self.headers.get('content-length') |
| if length: |
| env['CONTENT_LENGTH'] = length |
| referer = self.headers.get('referer') |
| if referer: |
| env['HTTP_REFERER'] = referer |
| accept = [] |
| for line in self.headers.getallmatchingheaders('accept'): |
| if line[:1] in "\t\n\r ": |
| accept.append(line.strip()) |
| else: |
| accept = accept + line[7:].split(',') |
| env['HTTP_ACCEPT'] = ','.join(accept) |
| ua = self.headers.get('user-agent') |
| if ua: |
| env['HTTP_USER_AGENT'] = ua |
| co = filter(None, self.headers.get_all('cookie', [])) |
| if co: |
| env['HTTP_COOKIE'] = ', '.join(co) |
| # XXX Other HTTP_* headers |
| # Since we're setting the env in the parent, provide empty |
| # values to override previously set values |
| for k in ('QUERY_STRING', 'REMOTE_HOST', 'CONTENT_LENGTH', |
| 'HTTP_USER_AGENT', 'HTTP_COOKIE', 'HTTP_REFERER'): |
| env.setdefault(k, "") |
| os.environ.update(env) |
| |
| self.send_response(200, "Script output follows") |
| |
| decoded_query = query.replace('+', ' ') |
| |
| if self.have_fork: |
| # Unix -- fork as we should |
| args = [script] |
| if '=' not in decoded_query: |
| args.append(decoded_query) |
| nobody = nobody_uid() |
| self.wfile.flush() # Always flush before forking |
| pid = os.fork() |
| if pid != 0: |
| # Parent |
| pid, sts = os.waitpid(pid, 0) |
| # throw away additional data [see bug #427345] |
| while select.select([self.rfile], [], [], 0)[0]: |
| if not self.rfile.read(1): |
| break |
| if sts: |
| self.log_error("CGI script exit status %#x", sts) |
| return |
| # Child |
| try: |
| try: |
| os.setuid(nobody) |
| except os.error: |
| pass |
| os.dup2(self.rfile.fileno(), 0) |
| os.dup2(self.wfile.fileno(), 1) |
| os.execve(scriptfile, args, os.environ) |
| except: |
| self.server.handle_error(self.request, self.client_address) |
| os._exit(127) |
| |
| else: |
| # Non-Unix -- use subprocess |
| import subprocess |
| cmdline = [scriptfile] |
| if self.is_python(scriptfile): |
| interp = sys.executable |
| if interp.lower().endswith("w.exe"): |
| # On Windows, use python.exe, not pythonw.exe |
| interp = interp[:-5] + interp[-4:] |
| cmdline = [interp, '-u'] + cmdline |
| if '=' not in query: |
| cmdline.append(query) |
| self.log_message("command: %s", subprocess.list2cmdline(cmdline)) |
| try: |
| nbytes = int(length) |
| except (TypeError, ValueError): |
| nbytes = 0 |
| p = subprocess.Popen(cmdline, |
| stdin=subprocess.PIPE, |
| stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE |
| ) |
| if self.command.lower() == "post" and nbytes > 0: |
| data = self.rfile.read(nbytes) |
| else: |
| data = None |
| # throw away additional data [see bug #427345] |
| while select.select([self.rfile._sock], [], [], 0)[0]: |
| if not self.rfile._sock.recv(1): |
| break |
| stdout, stderr = p.communicate(data) |
| self.wfile.write(stdout) |
| if stderr: |
| self.log_error('%s', stderr) |
| status = p.returncode |
| if status: |
| self.log_error("CGI script exit status %#x", status) |
| else: |
| self.log_message("CGI script exited OK") |
| |
| |
| def test(HandlerClass = BaseHTTPRequestHandler, |
| ServerClass = HTTPServer, protocol="HTTP/1.0"): |
| """Test the HTTP request handler class. |
| |
| This runs an HTTP server on port 8000 (or the first command line |
| argument). |
| |
| """ |
| |
| if sys.argv[1:]: |
| port = int(sys.argv[1]) |
| else: |
| port = 8000 |
| server_address = ('', port) |
| |
| HandlerClass.protocol_version = protocol |
| httpd = ServerClass(server_address, HandlerClass) |
| |
| sa = httpd.socket.getsockname() |
| print("Serving HTTP on", sa[0], "port", sa[1], "...") |
| try: |
| httpd.serve_forever() |
| except KeyboardInterrupt: |
| print("\nKeyboard interrupt received, exiting.") |
| httpd.server_close() |
| sys.exit(0) |
| |
| if __name__ == '__main__': |
| test(HandlerClass=SimpleHTTPRequestHandler) |