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server.py
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#!/usr/bin/env python3
import os
import posixpath
import http.server
import urllib.request, urllib.parse, urllib.error
import cgi
import shutil
import mimetypes
import re
import img_proc
from io import BytesIO
class SimpleHTTPRequestHandler(http.server.BaseHTTPRequestHandler):
"""Simple HTTP request handler with GET/HEAD/POST 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. And can reveive file uploaded
by client.
The GET/HEAD/POST requests are identical except that the HEAD
request omits the actual contents of the file.
"""
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.
"""
if self.path.__eq__('/') or self.path.startswith('/?'):
img = 'img2.jpg'
if self.path.startswith('/?'):
param_map_arr = self.path.replace('/?','')
param_map = param_map_arr.split('&')
dict = {}
for elem in param_map:
item = elem.split('=')
dict[item[0]] = item[1]
if dict.get('img') != None:
img = dict['img']
if 'color' in dict:
img_proc.changeColor(img, (300,100), dict['color'].split(','), None)
elif 'pattern'in dict:
img_proc.changeColor(img, (300,100), None, dict['pattern'])
self.path = './public/images/' + self.path
path = self.translate_path(self.path)
return self.list_directory(path, img)
self.path = './public/' + self.path
path = self.translate_path(self.path)
f = None
ctype = self.guess_type(path)
try:
# Always read in binary mode. Opening files in text mode may cause
# newline translations, making the actual size of the content
# transmitted *less* than the content-length!
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, img):
"""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())
f = BytesIO()
displaypath = cgi.escape(urllib.parse.unquote(self.path))
f.write(b'<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">')
f.write(("<html>\n<title>LN2</title><link rel='stylesheet' href='/css/index.css'/><script src='https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js'></script><script type='text/javascript' src='/js/index.js'></script>\n<body>\n").encode())
f.write(b"<h1>LN2 - What's cooler than Liquid Nitrogen</h1><hr>")
f.write(b"<div class='inline'>\n")
f.write(b"<h3> Sample Images </h3>")
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 /
f.write(('<span><img class="sample" src="/images/%s"/ data-name="%s" data-key="img"></span>'
% (urllib.parse.quote(linkname), linkname)).encode())
f.write(b"</div>")
f.write(b"<div class='inline'>")
f.write(b"<h3> Choose colors </h3>")
f.write(b"<span class='sample c1' data-name='220,180,170' data-key='color'></span>")
f.write(b"<span class='sample c2' data-name='220,99,78' data-key='color'></span>")
f.write(b"<span class='sample c3' data-name='135,168,161' data-key='color'></span>")
f.write(b"<span class='sample c4' data-name='220,180,170' data-key='color'></span>")
f.write(b"<span class='sample c5' data-name='107,148,109' data-key='color'></span>")
f.write(b"</div>")
f.write(b"<div class='inline'>")
f.write(b"<h3> Choose patterns </h3>")
f.write(b"<span><img class='sample' src='/patterns/pattern1.jpg' data-name='pattern1.jpg' data-key='pattern'/></span>")
f.write(b"<span><img class='sample' src='/patterns/pattern2.jpg' data-name='pattern2.jpg' data-key='pattern'/></span>")
f.write(b"<span><img class='sample' src='/patterns/pattern3.jpg' data-name='pattern3.jpg' data-key='pattern'/></span>")
f.write(b"<span><img class='sample' src='/patterns/pattern4.jpg' data-name='pattern4.jpg' data-key='pattern'/></span>")
f.write(b"</div>")
f.write(("<div><img class='main' src='/images/%s'/><img class='main' src='/edited/%s'/></div>" % (img, img)).encode())
f.write(b"</body>\n</html>\n")
length = f.tell()
f.seek(0)
self.send_response(200)
self.send_header("Content-type", "text/html")
self.send_header("Content-Length", str(length))
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 = [_f for _f in words if _f]
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',
})
def test(HandlerClass = SimpleHTTPRequestHandler,
ServerClass = http.server.HTTPServer):
http.server.test(HandlerClass, ServerClass)
if __name__ == '__main__':
test()