rns browser, standalone site server, unified add form

- /rns/<hash>/<path> proxies pages over RNS with link rewriting
- fetch_remote_page() in rns_client.py for generic RNS page fetching
- mesh_sites table for persisting saved hashes
- standalone site_server.py with its own RNS identity
- tinyweb-site/index.html: SPA with RSS-aware nav (/rns/<hash>/ prefix)
- unified /add form: single input accepts URL or 32-char RNS hash
- RNS add indexes into pages table (fetch root page, extract title/desc)
- rns:<hash> URLs displayed in browse/search, linked to /rns/<hash>/
- expand RNS whitelist: allow GET /, /about, /pages, /tags, /share

src/tinyweb/app.py

@@ -73,11 +73,22 @@ def load_or_create_identity():
     return identity
 
 
-# Remote peers on the Reticulum mesh can only reach a narrow, read-only surface.
-# Any other method/path is rejected here — CSRF cannot authenticate mesh callers
-# (the attacker controls both the "cookie" and the "form" side of the check), so
-# gating by whitelist is the only safe option.
-_RNS_ALLOWED = {("GET", "/api/sites")}
+# Remote peers on the Reticulum mesh can reach read-only public pages.
+# Only GET is allowed; POST is blocked because CSRF cannot authenticate
+# mesh callers (the attacker controls both the "cookie" and the "form" side).
+_RNS_ALLOWED_GET = {
+    "/", "/about", "/api/sites", "/share/preview",
+}
+
+_RNS_ALLOWED_PREFIXES = ("/pages", "/tags", "/api/sites", "/rns")
+
+
+def _rns_is_allowed(method, path):
+    if method != "GET":
+        return False
+    if path in _RNS_ALLOWED_GET:
+        return True
+    return any(path.startswith(p) for p in _RNS_ALLOWED_PREFIXES)
 
 
 def rns_request_handler(path, data, request_id, link_id, remote_identity, requested_at):
@@ -85,7 +96,7 @@ def rns_request_handler(path, data, request_id, link_id, remote_identity, reques
         data = {"method": "GET", "path": "/", "query": {}, "body": {}, "gateway_host": ""}
     method = data.get("method", "GET")
     req_path = data.get("path", "/")
-    if (method, req_path) not in _RNS_ALLOWED:
+    if not _rns_is_allowed(method, req_path):
         return {
             "status": 403,
             "content_type": "text/plain; charset=utf-8",

src/tinyweb/db.py

@@ -241,6 +241,13 @@ def init_db():
             VALUES (new.id, new.title, new.url, new.note);
         END;
     """)
+    db.execute(
+        "CREATE TABLE IF NOT EXISTS mesh_sites ("
+        "  hash TEXT PRIMARY KEY,"
+        "  name TEXT DEFAULT '',"
+        "  added_at TEXT DEFAULT (strftime('%Y-%m-%dT%H:%M:%S','now'))"
+        ")"
+    )
     # Migrate old subscriptions table if needed
     cols = [row[1] for row in db.execute("PRAGMA table_info(subscriptions)").fetchall()]
     if "url" in cols and "dest_hash" not in cols:

src/tinyweb/handlers/__init__.py

@@ -6,7 +6,7 @@ from urllib.parse import unquote
 from tinyweb.db import get_db, return_db, set_setting
 import tinyweb.templates as templates_mod
 from tinyweb.templates import esc, wrap_page
-from tinyweb.rns_client import fetch_remote_sites
+from tinyweb.rns_client import fetch_remote_sites, fetch_remote_page
 
 from ._helpers import (
     _request_local, _get_csrf_token, _csrf_field, _check_csrf,
@@ -38,6 +38,9 @@ from .data import (
     handle_export, handle_import_form, handle_import_submit,
     handle_reindex_form, handle_reindex_submit, _reindex_thread,
 )
+from .rns import (
+    handle_rns_delete_hash, handle_rns_browse,
+)
 
 forum_plugin = None
 
@@ -87,6 +90,13 @@ def _dispatch_inner(data):
         elif path.startswith("/tags/"):
             tag_name = unquote(path[len("/tags/"):])
             return handle_tag_browse(tag_name, query) if tag_name else _error(400)
+        elif path.startswith("/rns/"):
+            # /rns/<hash>/<subpath>
+            parts = path[len("/rns/"):].split("/", 1)
+            dest_hash = parts[0]
+            if not dest_hash:
+                return _error(404)
+            return handle_rns_browse(path, dest_hash)
         elif path == "/reindex":
             return handle_reindex_form()
         elif path == "/api/sites":
@@ -155,6 +165,8 @@ def _dispatch_inner(data):
             return handle_subscription_delete(sid) if sid is not None else _error(400)
         elif path == "/subscriptions/syncall":
             return handle_subscription_syncall()
+        elif path == "/rns/delete":
+            return handle_rns_delete_hash(body)
 
     return _error(404)
 

src/tinyweb/handlers/pages.py

@@ -29,11 +29,11 @@ def handle_add_form(msg="", action_type="index", prefill_url=""):
         )
     url_value = f'value="{esc(prefill_url)}" ' if prefill_url else ""
     return _respond(
-        f"<h1>add url</h1>"
-        f"<p>Add a site to your index</p>"
+        f"<h1>add site</h1>"
+        f"<p>Add a site to your index — URL or RNS destination hash</p>"
         f'<form method="post" action="/add">'
         f'{_csrf_field()}'
-        f'<input name="url" placeholder="https://example.com" size="50" {url_value}><br><br>'
+        f'<input name="url" placeholder="https://example.com or 32-char RNS hash" size="50" {url_value}><br><br>'
         f'<input name="note" placeholder="why are you saving this? (optional)" size="50"><br><br>'
         f'<input name="tags" placeholder="tags (comma-separated, e.g. solarpunk, mesh)" size="50"><br>'
         f'<small>tag: private to exclude from sharing</small><br><br>'
@@ -45,27 +45,37 @@ def handle_add_form(msg="", action_type="index", prefill_url=""):
 
 
 def handle_add_submit(body):
-    input_type = body.get("input_type", ["url"])[0]
-    url = body.get("url", [""])[0].strip()
-    reticulum_dest = body.get("reticulum_dest", [""])[0].strip().replace("<", "").replace(">", "")
+    raw = body.get("url", [""])[0].strip().replace("<", "").replace(">", "")
     note = body.get("note", [""])[0].strip()
     tags = body.get("tags", [""])[0].strip()
 
-    if input_type == "url":
-        if not url:
-            return handle_add_form("URL is required.")
-        url = clean_url(url)
-        if not url.startswith(("http://", "https://")):
-            return handle_add_form("URL must start with http:// or https://")
-    else:
-        if not reticulum_dest:
-            return handle_add_form("Reticulum destination hash is required.")
-        if len(reticulum_dest) != 32 or not all(c in "0123456789abcdefABCDEF" for c in reticulum_dest):
-            return handle_add_form("Invalid reticulum destination hash. Must be 32 hex characters.")
-        url = f"reticulum:{reticulum_dest}"
+    if not raw:
+        return handle_add_form("URL or RNS hash is required.")
+
+    is_rns = (
+        len(raw) == 32
+        and all(c in "0123456789abcdefABCDEF" for c in raw)
+    )
+    if raw.startswith("rns:") or raw.startswith("RNS:"):
+        raw = raw[4:]
+        is_rns = (
+            len(raw) == 32
+            and all(c in "0123456789abcdefABCDEF" for c in raw)
+        )
+
+    if is_rns:
+        from .rns import handle_rns_add_hash
+        errs = handle_rns_add_hash(raw)
+        if errs:
+            return handle_add_form(f"Hash saved but indexing failed: {'; '.join(errs)}")
+        return _redirect("/")
+
+    url = clean_url(raw)
+    if not url.startswith(("http://", "https://")):
+        return handle_add_form("Enter a URL (http:// or https://) or a 32-char RNS destination hash.")
 
     try:
-        title = index_url(url, note, reticulum_dest if reticulum_dest else "")
+        title = index_url(url, note)
         if tags:
             db = get_db()
             try:
@@ -75,12 +85,9 @@ def handle_add_submit(body):
                     db.commit()
             finally:
                 return_db(db)
-
         return handle_add_form(f'Indexed: {esc(url)}')
-
     except ValueError as e:
         return handle_add_form(f"Error: {esc(str(e))}")
-
     except Exception as e:
         error_msg = str(e).lower()
         if any(x in error_msg for x in ("block", "cloudflare", "403", "ssl", "handshake", "max retries", "timeout", "connection")):
@@ -168,10 +175,17 @@ def handle_pages(query=None):
             if tags:
                 tag_links = " ".join(f'<a href="/tags/{esc(t)}">[{esc(t)}]</a>' for t in tags)
                 tags_html = f' {tag_links}'
+            url = r["url"]
+            if url.startswith("rns:"):
+                display_url = url
+                link_url = f"/rns/{esc(url[4:])}/"
+            else:
+                display_url = url
+                link_url = url
             items += (
                 f'<li><label><input type="checkbox" name="ids" value="{r["id"]}"> '
                 f'{esc(r["title"])}</label>{note_html}{tags_html} '
-                f'<small>(<a href="{esc(r["url"])}" rel="noreferrer noopener">{esc(r["url"])}</a>)</small> '
+                f'<small>(<a href="{esc(link_url)}" rel="noreferrer noopener">{esc(display_url)}</a>)</small> '
                 f'<a href="/edit/{r["id"]}?p={page}">edit</a> '
                 f'<a href="/delete/{r["id"]}">remove</a></li>'
             )

src/tinyweb/handlers/rns.py

@@ -0,0 +1,163 @@
+import json
+import traceback
+from tinyweb.db import get_db, return_db
+from tinyweb.rns_client import fetch_remote_page
+from tinyweb.templates import esc
+
+
+def _get_mesh_sites():
+    db = get_db()
+    try:
+        return db.execute("SELECT hash, name, added_at FROM mesh_sites ORDER BY added_at DESC").fetchall()
+    finally:
+        return_db(db)
+
+
+def handle_rns_add_hash(dest_hash, name=""):
+    db = get_db()
+    errors = []
+    try:
+        db.execute(
+            "INSERT OR REPLACE INTO mesh_sites (hash, name) VALUES (?, ?)",
+            (dest_hash, name or ""),
+        )
+
+        try:
+            resp = fetch_remote_page(dest_hash, "/")
+            if resp.get("status") == 200:
+                body = resp.get("body", "")
+                title = name or dest_hash[:16]
+                import re
+                m = re.search(r"<title[^>]*>(.*?)</title>", body, re.IGNORECASE | re.DOTALL)
+                if m:
+                    title = m.group(1).strip()
+                desc = ""
+                m = re.search(r'<meta\s+name="description"\s+content="([^"]*)"', body, re.IGNORECASE)
+                if m:
+                    desc = m.group(1).strip()
+                if not desc:
+                    text = re.sub(r"<[^>]+>", " ", body)
+                    text = re.sub(r"\s+", " ", text).strip()
+                    desc = text[:200].strip()
+                url = f"rns:{dest_hash}"
+                import datetime
+                now = datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S")
+                db.execute(
+                    "INSERT OR REPLACE INTO pages (url, title, body, last_modified, summary) VALUES (?, ?, ?, ?, ?)",
+                    (url, title, body, now, desc),
+                )
+            else:
+                errors.append(f"Remote returned status {resp.get('status')}")
+        except Exception as e:
+            errors.append(str(e))
+            traceback.print_exc()
+
+        db.commit()
+    finally:
+        return_db(db)
+
+    return errors if errors else None
+
+
+def handle_rns_delete_hash(body):
+    dest_hash = body.get("hash", [""])[0].strip() if isinstance(body, dict) else body
+    db = get_db()
+    try:
+        db.execute("DELETE FROM mesh_sites WHERE hash = ?", (dest_hash,))
+        db.commit()
+    finally:
+        return_db(db)
+    from tinyweb.handlers.pages import _redirect
+    return _redirect("/")
+
+
+def _rewrite_links(html, dest_hash):
+    out = []
+    i = 0
+    while i < len(html):
+        href_start = html.find('href="', i)
+        src_start = html.find('src="', i)
+        action_start = html.find('action="', i)
+
+        candidates = []
+        if href_start >= 0:
+            candidates.append((href_start, "href", 'href="'))
+        if src_start >= 0:
+            candidates.append((src_start, "src", 'src="'))
+        if action_start >= 0:
+            candidates.append((action_start, "action", 'action="'))
+
+        if not candidates:
+            out.append(html[i:])
+            break
+
+        candidates.sort()
+        pos, attr, prefix = candidates[0]
+        out.append(html[i:pos + len(prefix)])
+
+        value_start = pos + len(prefix)
+        value_end = html.find('"', value_start)
+        if value_end < 0:
+            out.append(html[value_start:])
+            break
+        value = html[value_start:value_end]
+
+        if value.startswith("/"):
+            out.append(f"/rns/{dest_hash}{value}")
+        else:
+            out.append(value)
+
+        out.append('"')
+        i = value_end + 1
+
+    return "".join(out)
+
+
+def handle_rns_browse(path, dest_hash):
+    prefix = f"/rns/{dest_hash}"
+    sub_path = path[len(prefix):] if path.startswith(prefix) else "/"
+    if not sub_path:
+        sub_path = "/"
+
+    try:
+        resp = fetch_remote_page(dest_hash, sub_path)
+    except ConnectionError as e:
+        return {
+            "status": 200,
+            "content_type": "text/html; charset=utf-8",
+            "body": f"<h1>could not connect</h1><p>{esc(str(e))}</p>",
+            "headers": {},
+        }
+    except PermissionError:
+        return {
+            "status": 200,
+            "content_type": "text/html; charset=utf-8",
+            "body": "<h1>forbidden</h1><p>the remote instance blocked this request.</p>",
+            "headers": {},
+        }
+
+    if resp.get("status") != 200:
+        return {
+            "status": 200,
+            "content_type": "text/html; charset=utf-8",
+            "body": f"<h1>error</h1><p>remote returned status {resp['status']}</p>",
+            "headers": {},
+        }
+
+    body = resp.get("body", "")
+
+    if resp.get("content_type", "").startswith("application/json"):
+        try:
+            data = json.loads(body)
+            body = f"<pre>{esc(json.dumps(data, indent=2))}</pre>"
+        except (json.JSONDecodeError, TypeError):
+            body = f"<pre>{esc(body[:2000])}</pre>"
+
+    body = _rewrite_links(body, dest_hash)
+
+    return {
+        "status": 200,
+        "content_type": "text/html; charset=utf-8",
+        "body": body,
+        "headers": {},
+    }

src/tinyweb/handlers/search.py

@@ -83,10 +83,17 @@ def handle_search(query):
                         tag_links = " ".join(f'<a href="/tags/{esc(t)}" class="tag">[{esc(t)}]</a>' for t in tags)
                         tags_html = f'<div class="tags">{tag_links}</div>'
                     snip_html = f'<br>{esc(r["summary"])}' if r["summary"] else ""
+                    url = r["url"]
+                    if url.startswith("rns:"):
+                        display_url = url
+                        link_url = f"/rns/{esc(url[4:])}/"
+                    else:
+                        display_url = url
+                        link_url = url
                     result_html += (
                         f'<div class="result">'
-                        f'<a href="{esc(r["url"])}" rel="noreferrer noopener">{esc(r["title"])}</a><br>'
-                        f'<small>{esc(r["url"])}</small>'
+                        f'<a href="{esc(link_url)}" rel="noreferrer noopener">{esc(r["title"])}</a><br>'
+                        f'<small>{esc(display_url)}</small>'
                         f'{snip_html}'
                         f'{note_html}{tags_html}'
                         f'</div>'
@@ -162,6 +169,7 @@ def handle_search(query):
     sub_count = ""
     if q and remote_rows:
         sub_count = f" + {len(remote_rows)} from subscriptions"
+
     welcome_html = ""
     if count == 0 and not q:
         welcome_html = (

src/tinyweb/rns_client.py

@@ -12,21 +12,32 @@ _TIMEOUT_TIERS = [
 ]
 
 
-def fetch_remote_sites(dest_hash_hex, since=""):
-    """
-    Connect to a remote TinyWeb instance over Reticulum and fetch its
-    shared sites. Returns the response dict from /api/sites, or raises
-    an exception on failure. Pass `since` as ISO timestamp for delta sync.
+# Request path for "/tinyweb" destination
+_RNS_REQUEST_PATH = "/tinyweb"
 
-    Uses progressive timeouts: tries fast first, then retries with longer
-    timeouts for slow links (LoRa, multi-hop).
+
+def fetch_remote_sites(dest_hash_hex, since=""):
+    resp = _rns_request(dest_hash_hex, "/api/sites", {"since": [since]} if since else {})
+    return json.loads(resp.get("body", "{}"))
+
+
+def fetch_remote_page(dest_hash_hex, path, query=None):
+    return _rns_request(dest_hash_hex, path, query or {})
+
+
+def _rns_request(dest_hash_hex, path, query=None):
+    """Generic RNS request to a remote TinyWeb instance.
+
+    Connects over RNS, requests the given path, returns the response dict
+    (status, content_type, body, headers). Raises on failure.
+    Uses progressive timeouts: fast first, then slow for LoRa/multi-hop.
     """
     last_error = None
     for tier in _TIMEOUT_TIERS:
         try:
-            return _fetch(dest_hash_hex, since, tier)
+            return _fetch(dest_hash_hex, path, query or {}, tier)
         except PermissionError:
-            raise  # Don't retry permission errors
+            raise
         except Exception as e:
             last_error = e
             continue
@@ -35,12 +46,11 @@ def fetch_remote_sites(dest_hash_hex, since=""):
     )
 
 
-def _fetch(dest_hash_hex, since, timeouts):
-    """Single fetch attempt with the given timeout profile."""
+def _fetch(dest_hash_hex, path, query, timeouts):
+    """Single RNS fetch attempt with the given timeout profile."""
     dest_hash = bytes.fromhex(dest_hash_hex)
     poll = timeouts["poll"]
 
-    # Resolve path if needed
     if not RNS.Transport.has_path(dest_hash):
         RNS.Transport.request_path(dest_hash)
         elapsed = 0
@@ -64,7 +74,6 @@ def _fetch(dest_hash_hex, since, timeouts):
         *ASPECTS,
     )
 
-    # Establish link
     link = RNS.Link(destination)
     elapsed = 0
     while link.status == RNS.Link.PENDING and elapsed < timeouts["link"]:
@@ -77,17 +86,15 @@ def _fetch(dest_hash_hex, since, timeouts):
         )
 
     try:
-        query = {"since": [since]} if since else {}
         request_data = {
             "method": "GET",
-            "path": "/api/sites",
+            "path": path,
             "query": query,
             "body": {},
             "gateway_host": "",
         }
-
         req_timeout = timeouts["request"]
-        receipt = link.request("/tinyweb", data=request_data, timeout=req_timeout)
+        receipt = link.request(_RNS_REQUEST_PATH, data=request_data, timeout=req_timeout)
 
         elapsed = 0
         done = (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED, RNS.RequestReceipt.FAILED)
@@ -98,10 +105,10 @@ def _fetch(dest_hash_hex, since, timeouts):
         if receipt.get_status() in (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED):
             resp = receipt.get_response()
             if resp["status"] == 403:
-                raise PermissionError("That instance has sharing disabled.")
+                raise PermissionError("Forbidden")
             if resp["status"] != 200:
                 raise ConnectionError(f"Remote returned status {resp['status']}")
-            return json.loads(resp["body"])
+            return resp
         else:
             raise ConnectionError(
                 f"Request failed or timed out ({req_timeout}s timeout)"