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import socket
import threading
import time
from queue import Queue
import uvicorn
from fastapi import FastAPI, Form, Request
from fastapi.responses import HTMLResponse
# --- UI Template (HTML, CSS, JS) ---
# NOTE: All curly braces for CSS and JS are doubled (e.g., {{ ... }})
# to escape them from Python's .format() method. The only single-brace
# placeholder is {content}.
HTML_TEMPLATE = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>FastAPI Port Scanner</title>
<style>
:root {{
--bg-color: #1a1a1a;
--surface-color: #2c2c2c;
--primary-color: #00aaff;
--primary-hover-color: #0088cc;
--text-color: #e0e0e0;
--text-muted-color: #a0a0a0;
--success-color: #4CAF50;
--border-color: #444;
}}
body {{
font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
background-color: var(--bg-color);
color: var(--text-color);
margin: 0;
padding: 2rem;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
}}
.container {{
background-color: var(--surface-color);
padding: 2.5rem;
border-radius: 12px;
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
width: 100%;
max-width: 650px;
border: 1px solid var(--border-color);
}}
h1, h2 {{
color: var(--primary-color);
text-align: center;
margin-top: 0;
}}
form {{
display: flex;
flex-direction: column;
gap: 1.2rem;
}}
.form-group {{
display: flex;
flex-direction: column;
}}
label {{
font-weight: bold;
margin-bottom: 0.5rem;
font-size: 0.9rem;
}}
input {{
padding: 0.8rem 1rem;
border-radius: 6px;
border: 1px solid var(--border-color);
background-color: var(--bg-color);
color: var(--text-color);
font-size: 1rem;
transition: border-color 0.3s, box-shadow 0.3s;
}}
input:focus {{
outline: none;
border-color: var(--primary-color);
box-shadow: 0 0 0 3px rgba(0, 170, 255, 0.2);
}}
button {{
padding: 1rem;
border-radius: 6px;
border: none;
background-color: var(--primary-color);
color: #fff;
font-size: 1.1rem;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s;
margin-top: 1rem;
}}
button:hover {{
background-color: var(--primary-hover-color);
}}
.disclaimer {{
font-size: 0.8rem;
color: #ffeb3b;
text-align: center;
margin-top: 1.5rem;
border: 1px dashed #ffeb3b;
padding: 0.5rem;
border-radius: 4px;
}}
.loader {{
text-align: center;
padding: 3rem 0;
display: none; /* Hidden by default */
}}
.spinner {{
border: 8px solid var(--border-color);
border-top: 8px solid var(--primary-color);
border-radius: 50%;
width: 60px;
height: 60px;
animation: spin 1s linear infinite;
margin: 0 auto 1rem;
}}
@keyframes spin {{
0% {{ transform: rotate(0deg); }}
100% {{ transform: rotate(360deg); }}
}}
.results-table {{
width: 100%;
border-collapse: collapse;
margin-top: 1.5rem;
}}
.results-table th, .results-table td {{
padding: 0.8rem;
text-align: left;
border-bottom: 1px solid var(--border-color);
}}
.results-table th {{
color: var(--primary-color);
}}
.open-port {{
color: var(--success-color);
font-weight: bold;
}}
.scan-summary p {{
font-size: 1.1em;
background: #252525;
padding: 0.8em;
border-radius: 6px;
}}
a {{
color: var(--primary-color);
text-decoration: none;
display: inline-block;
margin-top: 1.5rem;
text-align: center;
width: 100%;
}}
</style>
</head>
<body>
<div class="container" id="main-container">
<!-- The content will be replaced by render_form or render_results -->
{content}
</div>
<script>
function showLoader() {{
const formContainer = document.getElementById('form-container');
const loader = document.getElementById('loader');
if (formContainer && loader) {{
formContainer.style.display = 'none';
loader.style.display = 'block';
}}
}}
</script>
</body>
</html>
"""
FORM_CONTENT = """
<div id="form-container">
<h1>FastAPI Port Scanner</h1>
<form action="/scan" method="post" onsubmit="showLoader()">
<div class="form-group">
<label for="target">Target IP Address or Hostname:</label>
<input type="text" id="target" name="target" value="127.0.0.1" required>
</div>
<div class="form-group">
<label for="start_port">Start Port:</label>
<input type="number" id="start_port" name="start_port" value="1" min="1" max="65535" required>
</div>
<div class="form-group">
<label for="end_port">End Port:</label>
<input type="number" id="end_port" name="end_port" value="65535" min="1" max="65535" required>
</div>
<div class="form-group">
<label for="threads">Number of Threads (Concurrency):</label>
<input type="number" id="threads" name="threads" value="2500" min="1" max="2500" required>
</div>
<button type="submit">Start Scan</button>
</form>
<div class="disclaimer">
<strong>Warning:</strong> Use only on networks you own or have explicit permission to scan. Unauthorized scanning is illegal.
</div>
</div>
<div class="loader" id="loader">
<div class="spinner"></div>
<p>Scanning in progress... This may take a moment.</p>
</div>
"""
# --- Scanner Logic ---
def run_scan(target_ip: str, start_port: int, end_port: int, num_threads: int):
"""
Sets up the queue and worker threads for scanning and returns the results.
This is now a self-contained function that returns results instead of using globals.
"""
q = Queue()
open_ports = []
thread_lock = threading.Lock()
def worker():
while not q.empty():
port = q.get()
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.settimeout(0.5) # Aggressive timeout
try:
if s.connect_ex((target_ip, port)) == 0:
with thread_lock:
open_ports.append(port)
except (socket.timeout, ConnectionRefusedError):
pass
q.task_done()
# Populate queue
for port in range(start_port, end_port + 1):
q.put(port)
# Create and start threads
threads = []
for _ in range(num_threads):
thread = threading.Thread(target=worker, daemon=True)
thread.start()
threads.append(thread)
q.join() # Block until all ports are scanned
open_ports.sort()
return open_ports
# --- FastAPI Application ---
app = FastAPI()
@app.get("/", response_class=HTMLResponse)
async def get_form():
"""Serves the main page with the input form."""
return HTML_TEMPLATE.format(content=FORM_CONTENT)
@app.post("/scan", response_class=HTMLResponse)
async def scan(
target: str = Form(...),
start_port: int = Form(...),
end_port: int = Form(...),
threads: int = Form(...)
):
"""Handles the scan request, runs the scanner, and returns the results page."""
# Input validation
if not (1 <= start_port <= end_port <= 65535):
return HTMLResponse(content="<h1>Error: Invalid port range.</h1>", status_code=400)
if not (1 <= threads <= 2500):
return HTMLResponse(content="<h1>Error: Thread count must be between 1 and 2500.</h1>", status_code=400)
# Resolve hostname
try:
target_ip = socket.gethostbyname(target)
except socket.gaierror:
return HTMLResponse(content=f"<h1>Error: Could not resolve hostname '{target}'</h1>", status_code=400)
start_time = time.time()
open_ports = run_scan(target_ip, start_port, end_port, threads)
duration = time.time() - start_time
# Build results content
results_html = f"""
<h2>Scan Results</h2>
<div class="scan-summary">
<p><strong>Target:</strong> {target} ({target_ip})</p>
<p><strong>Time Taken:</strong> {duration:.2f} seconds</p>
<p><strong>Open Ports Found:</strong> {len(open_ports)}</p>
</div>
"""
if open_ports:
rows = "".join(f'<tr><td class="open-port">{port}</td></tr>' for port in open_ports)
results_html += f"""
<table class="results-table">
<thead><tr><th>Open Port</th></tr></thead>
<tbody>{rows}</tbody>
</table>
"""
else:
results_html += "<p>No open ports were found in the specified range.</p>"
results_html += '<a href="/">Scan Another Target</a>'
return HTML_TEMPLATE.format(content=results_html)
# To run this app, you need uvicorn: `pip install uvicorn`
# Then run from your terminal: `uvicorn main:app --reload`
if __name__ == "__main__":
uvicorn.run("main:app", host="0.0.0.0", port=5000, reload=False) |