Add subpath support (#7)

README.md

@@ -7,11 +7,12 @@ personal diary with txt style, can be private!
 ## environment variables
 
 |        name        |             description             |    required     |
-| :----------------: | :-------------------: | :-------------: |
+| :----------------: | :---------------------------------: | :-------------: |
 |   `TD_USERNAME`    |              user name              |       no        |
 |   `TD_USERPASS`    |            user password            |       yes       |
 |    `TD_PRIVATE`    |           post visibility           | empty = `false` |
 | `TD_LOGINLIFETIME` |        login lifetime (days)        |   empty = `7`   |
+|   `TD_BASEROUTE`   | base route, must start with a slash |       no        |
 
 ## volumes (docker)
 

src/app.py

@@ -11,7 +11,7 @@ app = Flask(__name__, static_url_path="/")
 for file in glob("*/routes/*.py"):
     module = file.replace("/", ".").split(".")[-2]
     exec(f"from routes.{module} import router as {module}")
-    exec(f"app.register_blueprint({module})")
+    exec(f"app.register_blueprint({module}, url_prefix='{Config.base}')")
 
 app.secret_key = urandom(12)
 

src/routes/index.py

@@ -38,11 +38,11 @@ def new_post(post_id: int | None) -> Response:
             update = create_post(filename, content)
 
             flash(
-                f"<a href='/read/{filename}'>post {'updated' if update else 'created'}</a>."
+                f"<a href='{Config.sanitized_base()}/read/{filename}'>post {'updated' if update else 'created'}</a>."
             )
         else:
             flash(f"invalid post: {content}")
     else:
         flash("you can't do that.")
 
-    return redirect("/")
+    return redirect(Config.base)

src/routes/login.py

@@ -30,4 +30,4 @@ def check() -> Response:
     else:
         flash("already logged.")
 
-    return redirect("/")
+    return redirect(Config.base)

src/routes/read.py

@@ -37,4 +37,4 @@ def remove_post(file: int) -> Response:
         else:
             flash(f"{filename} doesn't exists")
 
-    return redirect("/")
+    return redirect(Config.base)

src/templates/header.html

@@ -2,7 +2,7 @@
   <h1>diary{{ " of " + config.user.name if config.user.name else "" }}</h1>
 
   {% if not (login_page or config.is_logged()) %}
-  <a href="/login">
+  <a href="{{ config.sanitized_base() }}/login">
     <svg width="30px" fill="none" viewBox="0 0 24 24">
       <path
         stroke="#000"

src/templates/index.html

@@ -18,7 +18,9 @@
       {% else %}
       <ul>
         {% for p in posts: %}
-        <li><a href="read/{{ p }}">{{ p }}.txt</a></li>
+        <li>
+          <a href="{{ config.sanitized_base() }}/read/{{ p }}">{{ p }}.txt</a>
+        </li>
         {% endfor %}
       </ul>
       {% endif %}

src/templates/login.html

@@ -10,14 +10,14 @@
       <h3>login page</h3>
 
       <span id="login-form">
-        <form action="/login" method="post">
+        <form action="{{ config.sanitized_base() }}/login" method="post">
           <input
             type="password"
             name="password"
             placeholder="password"
             autofocus
           />
-          <a href="/">Cancel</a>
+          <a href="{{ config.base }}">Cancel</a>
           <button type="submit">Login</button>
         </form></span
       >

src/templates/post.html

@@ -1,5 +1,8 @@
 {% if config.is_logged() %}
-<form action="/{% if name %}{{ post_file_id(name) }}{% endif %}" method="post">
+<form
+  action="{{ config.sanitized_base() }}/{% if name %}{{ post_file_id(name) }}{% endif %}"
+  method="post"
+>
   <textarea name="p">{{ "\n".join(file) }}</textarea>
   <br />
   <button type="submit">send</button>

src/templates/read.html

@@ -20,7 +20,7 @@
     <footer>
       <p>
         {% if file %}posted at {{ date }} // {% endif %}
-        <a href="/">back to index</a>
+        <a href="{{ config.base }}">back to index</a>
       </p>
     </footer>
 

src/templates/tz.html

@@ -1,6 +1,9 @@
 {% if "timezone" not in session %}
 <script type="text/javascript">
   const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
-  fetch("/set_timezone", { method: "POST", body: timezone });
+  fetch("{{ config.sanitized_base() }}/set_timezone", {
+    method: "POST",
+    body: timezone,
+  });
 </script>
 {% endif %}

src/utils/config.py

@@ -6,6 +6,7 @@ VAR_USERNAME = "TD_USERNAME"
 VAR_USERPASS = "TD_USERPASS"
 VAR_PRIVATE = "TD_PRIVATE"
 VAR_LOGLIFETIME = "TD_LOGINLIFETIME"
+VAR_BASE = "TD_BASEROUTE"
 
 
 class User:
@@ -47,6 +48,14 @@ class Config:
         float(envar[VAR_LOGLIFETIME]) if VAR_LOGLIFETIME in envar else 7.0
     )
 
+    # base
+    base = envar[VAR_BASE] if VAR_BASE in envar else "/"
+
+    @staticmethod
+    def sanitized_base() -> str:
+        """Sanitized base used in templates"""
+        return "" if Config.base == "/" else Config.base
+
     @staticmethod
     def is_logged() -> bool:
         """where the info about connection is stored"""