Send response on quota exceeded

So far, slcl would just close the connection with a client when the
Content-Length of an incoming request exceeded the user quota, without
any meaningful information given back to the user.

Now, slcl responds with a HTML file with meaningful information about
the error.

Limitations:

- While this commits has been successfully tested on ungoogled-chromium,
LibreWolf (and I assume Firefox and any other derivates too) does not
seem to receive the response from the server.
    - However, this issue only occurred during local testing, but not
on remote instances.

1 files changed, 2 insertions, 1 deletions

diff --git a/http.h b/http.h
index 33f42c6..ed0770f 100644
--- a/http.h
+++ b/http.h
@@ -45,6 +45,7 @@ struct http_payload
     X(UNAUTHORIZED, "Unauthorized", 401) \
     X(FORBIDDEN, "Forbidden", 403) \
     X(NOT_FOUND, "Not found", 404) \
+    X(PAYLOAD_TOO_LARGE, "Payload too large", 413) \
     X(INTERNAL_ERROR, "Internal Server Error", 500)
 
 struct http_response
@@ -80,7 +81,7 @@ struct http_cfg
     int (*payload)(const struct http_payload *p, struct http_response *r,
         void *user);
     int (*length)(unsigned long long len, const struct http_cookie *c,
-        void *user);
+        struct http_response *r, void *user);
     const char *tmpdir;
     void *user;
 };