SWDEV-402866: Added browser file mode. Fixed caching. Changed ATT buffer size. Added MAX_ATT environment variable. Updated README/Changelog.

Change-Id: I36a6093bb85bf4ef179b59df676fc2e4cbdb5288

plugin/att/ui/httpserver.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+import sys
+if sys.version_info[0] < 3:
+    raise Exception("Must be using Python 3")
+
+import http.server
+import socketserver
+import socket
+import os
+import sys
+
+class NoCacheHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
+    def end_headers(self):
+        self.send_my_headers()
+        http.server.SimpleHTTPRequestHandler.end_headers(self)
+
+    def send_my_headers(self):
+        self.send_header("Cache-Control", "no-cache, no-store, must-revalidate")
+        self.send_header("Pragma", "no-cache")
+        self.send_header("Expires", "0")
+
+    def do_GET(self):
+        if 'timeline.png?' in self.path:
+            self.path = 'timeline.png'
+
+        http.server.SimpleHTTPRequestHandler.do_GET(self)
+
+class RocTCPServer(socketserver.TCPServer):
+    def server_bind(self):
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.socket.bind(self.server_address)
+
+def run_server():
+    Handler = NoCacheHTTPRequestHandler
+    os.chdir(os.path.join(os.path.dirname(os.path.abspath(__file__)),'.'))
+    try:
+        with RocTCPServer((IPAddr, PORT), Handler) as httpd:
+            httpd.serve_forever()
+    except KeyboardInterrupt:
+        pass
+
+def get_ip():
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    s.settimeout(0)
+    try:
+        hostname = socket.gethostname()
+        IPAddr = socket.gethostbyname(hostname)
+        s.connect(({IPAddr}, 1))
+    except Exception:
+        IPAddr = '127.0.0.1'
+    finally:
+        return IPAddr
+
+IPAddr = get_ip()
+PORT = 8000
+
+if len(sys.argv) > 1:
+    PORT = int(sys.argv[1])
+print('serving at port: {0}'.format(PORT))
+
+try:
+    run_server()
+except KeyboardInterrupt:
+    print("Exitting.")