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May 9, 2020 22:07
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import socket | |
import threading | |
from datetime import datetime | |
import sys | |
import os | |
import mimetypes | |
import urllib.parse | |
import subprocess | |
respTemplate = """HTTP/1.1 {statusNum} {statusCode} | |
Date: {dateSent} | |
Server: {server} | |
Last-Modified: {modified} | |
Content-Length: {length} | |
Content-Type: {contentType} | |
Connection: {connectionType} | |
{body} | |
""" | |
DOC_ROOT = "DocRoot" | |
CODES = {"200": "OK", | |
"304": "NOT MODIFIED", | |
"400": "BAD REQUEST", "401": "UNAUTHORIZED", "403": "FORBIDDEN", "404": "NOT FOUND", | |
"500": "INTERNAL SERVER ERROR"} | |
MIMES = {"txt": "text/plain", "css":"text/css", "html":"text/html", "png": "image/png", "jpg":"image/jpg", | |
"ttf":"application/octet-stream","otf":"application/octet-stream", "woff":"font/woff", "woff2": "font/woff2", | |
"js":"application/javascript","gz":"application/zip", "py":"text/plain", "map": "application/octet-stream"} | |
class Response: | |
def __init__(self, **kwargs): | |
self.__dict__.update(kwargs) | |
now = datetime.now() | |
self.dateSent = self.modified = now.strftime("%a, %d %b %Y %H:%M:%S") | |
def stringResponse(self): | |
return respTemplate.format(**self.__dict__) | |
class Request: | |
def __init__(self, request): | |
self.good = True | |
try: | |
request = self.parseRequest(request) | |
self.method = request["method"] | |
self.doc = request["doc"] | |
self.vers = request["vers"] | |
self.header = request["header"] | |
self.body = request["body"] | |
except: | |
self.good = False | |
def parseRequest(self, request): | |
req = request.strip("\r").split("\n") | |
method,doc,vers = req[0].split(" ") | |
header = req[1:-3] | |
body = req[-1] | |
headerDict = {} | |
for param in header: | |
pos = param.find(": ") | |
key, val = param[:pos], param[pos+2:] | |
headerDict.update({key: val}) | |
return {"method": method, "doc": doc, "vers": vers, "header": headerDict, "body": body} | |
class Server: | |
def __init__(self, host, port): | |
self.host = host | |
self.port = port | |
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) | |
self.sock.bind((self.host, self.port)) | |
def listen(self): | |
self.sock.listen(5) | |
while True: | |
client, address = self.sock.accept() | |
client.settimeout(60) | |
threading.Thread(target = self.listenToClient,args = (client,address)).start() | |
def listenToClient(self, client, address): | |
size = 1024 | |
while True: | |
try: | |
data = client.recv(size) | |
if data: | |
# Set the response to echo back the recieved data | |
req = Request(data.decode()) | |
self.handleRequest(req, client, address) | |
client.shutdown() | |
client.close() | |
else: | |
raise error('Client disconnected') | |
except: | |
client.close() | |
return False | |
def handleRequest(self, request, conn, address): | |
if request.good: | |
# try: | |
# print(str(request.method) + " " + str(request.doc), end=' ') | |
# print("from {0}".format(address[0])) | |
# except Exception as e: | |
# print(e) | |
document = self.serveDoc(request.doc, DOC_ROOT) | |
statusNum=document["status"] | |
else: | |
document = self.serveDoc("/errors/400.html", DOC_ROOT) | |
statusNum="400" | |
body = document["body"] | |
statusCode=CODES[statusNum] | |
dateSent = "" | |
server = "BadHTTPServer" | |
modified = "" | |
length = len(body) | |
contentType = document["mime"] # Try and identify MIME type from string | |
connectionType = "Closed" | |
resp = Response( | |
statusNum=statusNum, statusCode=statusCode, | |
dateSent = dateSent, server = server, | |
modified = modified, length = length, | |
contentType = contentType, connectionType = connectionType, | |
body = body | |
) | |
data = resp.stringResponse() | |
if not data: | |
return -1 | |
conn.send(data.encode()) | |
return 0 | |
def serveDoc(self, path, docRoot): | |
path = urllib.parse.unquote(path) | |
try: | |
info = "output = 'Document: {}'" # Keep the output for later debug | |
exec(info.format(path)) # This is how you do string formatting, right? | |
cwd = os.path.dirname(os.path.realpath(__file__)) | |
docRoot = os.path.join(cwd, docRoot) | |
if path == "/": | |
path = "/index.html" | |
requested = os.path.join(docRoot, path[1:]) | |
if os.path.isfile(requested): | |
mime = mimetypes.guess_type(requested) | |
mime = (mime if mime[0] != None else "text/html") | |
mime = MIMES[requested.split(".")[-1]] | |
try: | |
with open(requested, "r") as f: | |
data = f.read() | |
except: | |
with open(requested, "rb") as f: | |
data = f.read() | |
status = "200" | |
else: | |
errorPage = os.path.join(docRoot, "errors", "404.html") | |
mime = "text/html" | |
with open(errorPage, "r") as f: | |
data = f.read().format(path) | |
status = "404" | |
except Exception as e: | |
print(e) | |
errorPage = os.path.join(docRoot, "errors", "500.html") | |
mime = "text/html" | |
with open(errorPage, "r") as f: | |
data = f.read() | |
status = "500" | |
return {"body": data, "mime": mime, "status": status} |
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