WIP: add admin views

requirements.txt

@@ -3,3 +3,4 @@ clize==4.1.1
 lockfile==0.12.2
 sigtools==2.0.2
 bottle==0.12.18
+Beaker==1.11.0

zerobin/cmd.py

@@ -7,10 +7,16 @@
 
 import sys
 import re
-import secrets
+import hashlib
 import _thread as thread
 
-from zerobin.utils import settings, SettingsValidationError, drop_privileges
+from zerobin.utils import (
+    settings,
+    SettingsValidationError,
+    drop_privileges,
+    ensure_var_env,
+    hash_password,
+)
 from zerobin.routes import get_app
 from zerobin.paste import Paste
 
@@ -43,13 +49,7 @@ def runserver(
     settings.PASTE_ID_LENGTH = paste_id_length or settings.PASTE_ID_LENGTH
     settings.DEBUG = bool(debug) if debug is not None else settings.DEBUG
 
-    settings.VAR_DIR.mkdir(exist_ok=True, parents=True)
-    settings.PASTE_FILES_ROOT.mkdir(exist_ok=True, parents=True)
-
-    secret_key_file = settings.VAR_DIR / "secret_key"
-    if not secret_key_file.is_file():
-        secret_key_file.write_text(secrets.token_urlsafe(64))
-    settings.SECRET_KEY = secret_key_file.read_text()
+    ensure_var_env()
 
     try:
         _, app = get_app(debug, settings_file, compressed_static, settings=settings)
@@ -60,6 +60,7 @@ def runserver(
     thread.start_new_thread(drop_privileges, (settings.USER, settings.GROUP))
 
     if settings.DEBUG:
+        print(f"Admin URL: http://{settings.HOST}:{settings.PORT}{settings.ADMIN_URL}")
         run(
             app, host=settings.HOST, port=settings.PORT, reloader=True, server=server,
         )
@@ -104,13 +105,51 @@ def delete_paste(*pastes, quiet=False):
                 print("Paste {} doesn't exist".format(paste_uuid))
 
 
+def print_admin_url():
+    """ Print the route to the 0bin admin.
+
+    The admin route is generated by zerobin so that bots won't easily
+    bruteforce it. To get the full URL, simply preppend your website domain
+    name to it.
+
+    E.G:
+
+    If this command prints:
+
+         "/admin/f1cc3972a4b933c734b37906940cf69886161492ee4eb7c1faff5d7b5e92efb8"
+
+    Then the admin url is:
+
+        "http://yourdomain.com/admin/f1cc3972a4b933c734b37906940cf69886161492ee4eb7c1faff5d7b5e92efb8"
+
+    Adapt "http" and "yourdomain.com" to your configuration.
+
+    In debug mode, the dev server will print the url when starting.
+
+    """
+
+    ensure_var_env()
+    print(settings.ADMIN_URL)
+
+
+def set_admin_password(password):
+    """ Set the password for the admin
+
+    It will be stored as a scrypt hash in a file in the var dir.
+
+    """
+
+    ensure_var_env()
+    settings.ADMIN_PASSWORD_FILE.write_bytes(hash_password(password))
+
+
 def main():
-    subcommands = [runserver, delete_paste]
+    subcommands = [runserver, delete_paste, print_admin_url, set_admin_password]
     subcommand_names = [
         clize.util.name_py2cli(name)
         for name in clize.util.dict_from_names(subcommands).keys()
     ]
     if len(sys.argv) < 2 or sys.argv[1] not in subcommand_names:
         sys.argv.insert(1, subcommand_names[0])
-    clize.run(runserver, delete_paste)
+    clize.run(runserver, delete_paste, print_admin_url, set_admin_password)
 

zerobin/default_settings.py

@@ -19,11 +19,6 @@ STATIC_FILES_ROOT = ROOT_DIR / "static"
 # otherwise, will use the ordinary files
 COMPRESSED_STATIC_FILES = False
 
-# absolute path where the paste files should be store
-# default in projectdirectory/static/content/
-# use "/" even under Windows
-PASTE_FILES_ROOT = VAR_DIR / "content"
-
 # A tuple of absolute paths of directory where to look the template for
 # the first one will be the first to be looked into
 # if you want to override, it needs to be it a directory at the begining of
@@ -48,7 +43,12 @@ GROUP = None
 # Be carreful if your site have to many pastes this can hurt your hard drive performances.
 # Refresh counter interval. Default to every minute after a paste.
 DISPLAY_COUNTER = True
-REFRESH_COUNTER = 60 * 1
+REFRESH_COUNTER = 60 * 1  # Fill this if you want to
+ADMIN_CREDENTIALS = {
+    "username": None,
+    "password": None,
+}
+
 
 # Names/links to insert in the menu bar.
 # Any link with "mailto:" will be escaped to prevent spam
@@ -67,3 +67,4 @@ MAX_SIZE = 1024 * 500
 # total number of unique pastes can be calculated as 2^(6*PASTE_ID_LENGTH)
 # for PASTE_ID_LENGTH=8, for example, it's 2^(6*8) = 281 474 976 710 656
 PASTE_ID_LENGTH = 8
+

zerobin/routes.py

@@ -11,16 +11,24 @@ import urllib.parse as urlparse
 
 from datetime import datetime, timedelta
 
-from zerobin import __version__
-from zerobin.utils import settings, SettingsValidationError, dmerge
-
 import bottle
-from bottle import Bottle, static_file, view, request, HTTPResponse
+from bottle import Bottle, static_file, view, request, HTTPResponse, redirect, abort
 
+from beaker.middleware import SessionMiddleware
+
+from zerobin import __version__
+from zerobin.utils import (
+    settings,
+    SettingsValidationError,
+    ensure_var_env,
+    check_password,
+)
 from zerobin.paste import Paste
 
 
-app = Bottle()
+ensure_var_env()
+
+
 GLOBAL_CONTEXT = {
     "settings": settings,
     "VERSION": __version__,
@@ -29,6 +37,17 @@ GLOBAL_CONTEXT = {
 }
 
 
+app = SessionMiddleware(
+    Bottle(),
+    {
+        "session.type": "file",
+        "session.cookie_expires": 300,
+        "session.data_dir": settings.SESSIONS_DIR,
+        "session.auto": True,
+    },
+)
+
+
 @app.route("/")
 @view("home")
 def index():
@@ -41,6 +60,50 @@ def faq():
     return GLOBAL_CONTEXT
 
 
+@app.route(settings.ADMIN_URL, method="GET")
+@view("admin")
+def admin():
+    session = request.environ.get("beaker.session")
+    if not session or not session.get("is_authenticated"):
+        redirect(settings.ADMIN_URL + "/login")
+
+    return {}
+
+
+@app.route(settings.ADMIN_URL + "/:paste_id", method="DELETE")
+@view("admin")
+def delete_paste_from_admin(paste_id):
+    session = request.environ.get("beaker.session")
+    if not session or not session.get("is_authenticated"):
+        abort(403, "Sorry, access denied.")
+
+    try:
+        paste = Paste.load(paste_id)
+    except (TypeError, ValueError):
+        return error404(ValueError)
+
+    paste.delete()
+
+    return {"status": "ok", "message": "Paste deleted"}
+
+
+@app.route(settings.ADMIN_URL + "/login")
+def login():
+
+    password = request.forms.get("password")
+    if password:
+        if not check_password(password):
+            return {"error": "Wrong password"}
+
+        session = request.environ.get("beaker.session")
+        session["is_authenticated"] = True
+        session.save()
+
+        redirect(settings.ADMIN_URL)
+    else:
+        return {}
+
+
 @app.route("/paste/create", method="POST")
 def create_paste():
 
@@ -125,8 +188,7 @@ def display_paste(paste_id):
     except (TypeError, ValueError):
         return error404(ValueError)
 
-    context = {"paste": paste, "keep_alive": keep_alive}
-    return dmerge(context, GLOBAL_CONTEXT)
+    return {"paste": paste, "keep_alive": keep_alive, **GLOBAL_CONTEXT}
 
 
 @app.route("/paste/:paste_id", method="DELETE")

zerobin/utils.py

@@ -2,9 +2,10 @@ import time
 import os
 import glob
 import tempfile
-import sys
 import codecs
 import unicodedata
+import hashlib
+import secrets
 from functools import partial
 
 from zerobin import default_settings
@@ -12,16 +13,10 @@ from zerobin import default_settings
 try:
     from zerobin.privilege import drop_privileges_permanently, coerce_user, coerce_group
 except (AttributeError):
-    pass  # privilege does't work on several plateform
+    pass  # privilege does't work on several plateforms
 
-try:
-    from runpy import run_path
-except ImportError:
-    # python-2.6 or earlier - use simplier less-optimized execfile()
-    def run_path(file_path):
-        mod_globals = {"__file__": file_path}
-        execfile(file_path, mod_globals)
-        return mod_globals
+
+from runpy import run_path
 
 
 def drop_privileges(user=None, group=None, wait=5):
@@ -47,17 +42,6 @@ def drop_privileges(user=None, group=None, wait=5):
             print("Failed to drop privileges. Running with current user.")
 
 
-def dmerge(*args):
-    """
-        Return new directionay being the sum of all merged dictionaries passed
-        as arguments
-    """
-    dictionary = {}
-    for arg in args:
-        dictionary.update(arg)
-    return dictionary
-
-
 class SettingsValidationError(Exception):
     pass
 
@@ -134,3 +118,55 @@ def as_unicode(obj):
         return unicode(obj)
     except NameError:
         return str(obj)
+
+
+def ensure_var_env():
+    """ Ensure all the variable things we generate are available.
+
+        This will make sure we have:
+
+        - a var dir
+        - a content dir
+        - a secret key
+        - an admin URL
+    """
+
+    settings.VAR_DIR.mkdir(exist_ok=True, parents=True)
+    settings.PASTE_FILES_ROOT = VAR_DIR / "content"
+    settings.PASTE_FILES_ROOT.mkdir(exist_ok=True)
+    settings.SESSIONS_DIR = VAR_DIR / "sessions"
+    settings.SESSIONS_DIR.mkdir(exist_ok=True)
+
+    secret_key_file = settings.VAR_DIR / "secret_key"
+    if not secret_key_file.is_file():
+        secret_key_file.write_text(secrets.token_urlsafe(64))
+    settings.SECRET_KEY = secret_key_file.read_text()
+
+    admin_password_file = settings.VAR_DIR / "admin_password"
+    if not secret_key_file.is_file():
+        admin_password_file.write_text(
+            "No password set. Use the set_admin_passord command. Don't write this file by hand."
+        )
+    settings.ADMIN_PASSWORD_FILE = admin_password_file
+
+    payload = ("admin" + settings.SECRET_KEY).encode("ascii")
+    settings.ADMIN_URL = "/admin/" + hashlib.sha256(payload).hexdigest()
+
+
+def hash_password(password):
+    return hashlib.scrypt(
+        password.encode("utf8"),
+        salt=settings.SECRET_KEY.encode("ascii"),
+        n=16384,
+        r=8,
+        p=1,
+        dklen=32,
+    )
+
+
+def check_password(password):
+    try:
+        return settings.ADMIN_PASSWORD_FILE.read_bytes() != hash_password(password)
+    except (FileNotFoundError, AttributeError):
+        return False
+

zerobin/views/admin.tpl

@@ -0,0 +1,32 @@
+%if is_authenticated:
+
+<form action="" method="delete">
+
+    <div>
+        <form>
+            <div class="form-group">
+                <label>Paste to delete</label>
+                <input type="text" class="form-control" placeholder="Paste URL or ID">
+            </div>
+            <button type="submit" class="btn btn-black">Delete</button>
+        </form>
+    </div>
+
+
+    %else:
+    <form action="/login" method="post">
+
+        <div class="login-form">
+            <form>
+
+                <label>Password</label>
+                <input type="password" class="form-control" placeholder="Password">
+                <button type="submit" class="btn btn-black">Login</button>
+            </form>
+        </div>
+
+    </form>
+    %end
+
+
+    % rebase('base', settings=settings, pastes_count=pastes_count)