Created
February 4, 2015 14:15
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minimal text based bulletin board using http.server, single threaded, auto refreshes. exactly 100 loc.
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| from __future__ import print_function #from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler | |
| import http.server, urllib, datetime | |
| #================================================================= | |
| sUrl="/chatbox" #server url | |
| port=8080 #server port | |
| timedRefresh="15" #time before page refreshes | |
| msgBox=[] #messages held here as dict objects | |
| #================================================================= | |
| # create html | |
| #================================================================= | |
| def makeHtml(): | |
| msgHtml="" #html from msgbox | |
| for item in msgBox: | |
| msgHtml+= "<div><b class='alias'>" + item['alias'] + "</b>: <span class='timestamp'>" + str(item['created']).split(".")[0] +"</span><p class='message'>" + item['message'] + "</p></div>" | |
| #html to render in page | |
| htmlIndex="""<!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Chatbox!</title> | |
| <!--meta http-equiv="refresh" content="10"/--> | |
| <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> | |
| <style> | |
| @import url(http://fonts.googleapis.com/css?family=Open+Sans:300,400); | |
| body{ font-family: "Open Sans", sans; font-weight: 300; font-size: 15px; padding: 0 2em; max-width: 960px; margin: 0 auto;} | |
| h1 { font-weight: 300; text-align: center;} | |
| textarea {overflow: auto; resize: vertical; margin-top: 0.5em; display: block; width: 100%;} | |
| #form-wrapper {padding: 0;} | |
| #update-wrapper {padding: 0.3em 0;} | |
| #messages-wrapper {padding: 1em 0;} | |
| #messages-wrapper div { border-bottom: 1px solid #F5F5F5; padding: 0.5em;} | |
| #messages-wrapper div .alias {font-weight: 400; display: inline; border-bottom: 1px solid #9E9E9E;} | |
| #messages-wrapper div .message { display: inline-block; word-wrap: break-word; padding: 2emi 0;} | |
| #messages-wrapper div .timestamp { display: inline-block; float: right; margin-top: 0em;} | |
| </style> | |
| </head> | |
| <body> | |
| <h1 style="margin-bottom: 0;"><a href='""" + sUrl + """' style="color: #39c; text-decoration: none;">Chatbox!</a></h1> | |
| <p style="text-align: center; margin: 0;">Anonymous text board for small groups.</p> | |
| <div id="form-wrapper"> | |
| <div id="update-wrapper"> | |
| <input type="checkbox" id="updateCheck" checked/> | |
| <span id="countdown"></span> | |
| </div> | |
| <form method="post" action=""> | |
| <input type="text" name="alias" placeholder="alias(optional)" style="display: block; width: 100%;"/> | |
| <textarea name="message" placeholder="message" autofocus required></textarea> | |
| <button type="submit">Submit</button> | |
| </form> | |
| </div> | |
| <div id="messages-wrapper"> """ + msgHtml + """ </div> | |
| <!--auto refresh with js + counter--> | |
| <script>(function countdown(remaining) { | |
| if (document.getElementById('updateCheck').checked != false) { //if remaining zero, reload page | |
| if(remaining <= 0) | |
| location.reload(true); | |
| document.getElementById('countdown').innerHTML = "Updating in: " + remaining; | |
| setTimeout(function(){ countdown(remaining - 1); }, 1000); | |
| } else { //check status in a bit | |
| document.getElementById('countdown').innerHTML = "Check to autoupdate."; | |
| setTimeout(function(){countdown(remaining);}, 2000); | |
| } })(""" + timedRefresh + """); // seconds | |
| </script> | |
| </body> | |
| </html> """ | |
| return htmlIndex | |
| #================================================================= | |
| # request handler | |
| #================================================================= | |
| class ChatHandler(http.server.BaseHTTPRequestHandler): #handler here | |
| def do_GET(self): #show form and messages | |
| html=makeHtml() | |
| self.send_response(200) | |
| self.send_header('Content-type', 'text/html') | |
| self.send_header('Content-length', len(html)) | |
| self.end_headers() | |
| self.wfile.write(bytes(html, 'utf-8')) | |
| return | |
| def do_POST(self): #add message to list, redirect to base page | |
| l=int(self.headers['Content-length']) | |
| pdata=urllib.parse.parse_qs(self.rfile.read(l).decode('utf-8')) | |
| if pdata: | |
| alias="".join(pdata.get('alias', "anonymous")) #sometimes returning list | |
| message="".join(pdata.get('message')) # message required to do post | |
| if message: | |
| global msgBox | |
| msgBox.append({'alias':alias, 'message': message, 'created': datetime.datetime.now()}) | |
| self.send_response(302) | |
| self.send_header("Location", sUrl) #redirect | |
| self.end_headers() | |
| return | |
| #================================================================= | |
| # run server | |
| #================================================================= | |
| print("Server running on port: ", port) | |
| httpd=http.server.HTTPServer(("", port), ChatHandler) | |
| try: httpd.serve_forever() | |
| except KeyboardInterrupt: | |
| print("Shutting down server"); | |
| httpd.socket.close() |
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