Configure client max size

docs/man/pantalaimon.5

@@ -56,6 +56,8 @@ This option configures if a proxy instance should only keep the latest version
 of a room key from a certain user around. This effectively means that only newly
 incoming messages will be decryptable, the proxy will be unable to decrypt the
 room history.  Defaults to "No".
+.It Cm ClientMaxSize
+The maximum size of a request, in bytes. Defaults to "104857600".
 .It Cm SearchRequests
 This option configures if the proxy should make additional HTTP requests to the
 server when clients use the search API endpoint. Some data that is required to

docs/man/pantalaimon.5.md

@@ -69,6 +69,10 @@ The following keys are optional in the proxy instance sections:
 > incoming messages will be decryptable, the proxy will be unable to decrypt the
 > room history.  Defaults to "No".
 
+**ClientMaxSize**
+
+> The maximum size of a request, in bytes. Defaults to "104857600".
+
 Additional to the homeserver section a special section with the name
 **Default**
 can be used to configure the following values for all homeservers:

pantalaimon/config.py

@@ -40,6 +40,7 @@ def __init__(self):
                 "HistoryFetchDelay": "3000",
                 "DebugEncryption": "False",
                 "DropOldKeys": "False",
+                "ClientMaxSize": "104857600",
             },
             converters={
                 "address": parse_address,
@@ -124,6 +125,7 @@ class ServerConfig:
             requests in seconds.
         drop_old_keys (bool): Should Pantalaimon only keep the most recent
             decryption key around.
+        client_max_size (int): The maximum size of a request, in bytes.
     """
 
     name = attr.ib(type=str)
@@ -141,6 +143,7 @@ class ServerConfig:
     indexing_batch_size = attr.ib(type=int, default=100)
     history_fetch_delay = attr.ib(type=int, default=3)
     drop_old_keys = attr.ib(type=bool, default=False)
+    client_max_size = attr.ib(type=int, default=1024**2 * 100)
 
 
 @attr.s
@@ -235,6 +238,13 @@ def read(self):
                 listen_set.add(listen_tuple)
                 drop_old_keys = section.getboolean("DropOldKeys")
 
+                client_max_size = section.getint("ClientMaxSize")
+
+                if not 0 < client_max_size:
+                    raise PanConfigError(
+                        "The client max size must be a positive integer"
+                    )
+
                 server_conf = ServerConfig(
                     section_name,
                     homeserver,
@@ -249,6 +259,7 @@ def read(self):
                     indexing_batch_size,
                     history_fetch_delay / 1000,
                     drop_old_keys,
+                    client_max_size,
                 )
 
                 self.servers[section_name] = server_conf

pantalaimon/main.py

@@ -62,8 +62,7 @@ async def init(data_dir, server_conf, send_queue, recv_queue):
         client_store_class=store_class,
     )
 
-    # 100 MB max POST size
-    app = web.Application(client_max_size=1024**2 * 100)
+    app = web.Application(client_max_size=server_conf.client_max_size)
 
     app.add_routes(
         [