"""Simple HTTP Server. This module builds on BaseHTTPServer by implementing the standard GET and HEAD requests in a fairly straightforward manner. """ __version__ = "0.4" import os import string import posixpath import BaseHTTPServer import urllib import cgi import shutil from StringIO import StringIO class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler): """Simple HTTP request handler with GET and HEAD commands. This serves files from the current directory and any of its subdirectories. It assumes that all files are plain text files unless they have the extension ".html" in which case it assumes they are HTML files. 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): 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) if ctype.startswith('text/'): mode = 'r' else: mode = 'rb' try: f = open(path, mode) except IOError: self.send_error(404, "File not found") return None self.send_response(200) self.send_header("Content-type", ctype) 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(lambda a, b: cmp(a.lower(), b.lower())) f = StringIO() f.write("

Directory listing for %s

\n" % self.path) f.write("
\n\n
\n") f.seek(0) self.send_response(200) self.send_header("Content-type", "text/html") 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.) """ path = posixpath.normpath(urllib.unquote(path)) words = string.splitfields(path, '/') 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 text/plain 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 self.extensions_map.has_key(ext): return self.extensions_map[ext] ext = string.lower(ext) if self.extensions_map.has_key(ext): return self.extensions_map[ext] else: return self.extensions_map[''] extensions_map = { '': 'text/plain', # Default, *must* be present '.html': 'text/html', '.htm': 'text/html', '.gif': 'image/gif', '.jpg': 'image/jpeg', '.jpeg': 'image/jpeg', } def test(HandlerClass = SimpleHTTPRequestHandler, ServerClass = BaseHTTPServer.HTTPServer): BaseHTTPServer.test(HandlerClass, ServerClass) if __name__ == '__main__': test()