Mercurial > urweb
diff src/c/urweb.c @ 1552:c3b5cf5c2f98
Gentle handling of back-button returns to pages with stale message-passing credentials
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Sun, 28 Aug 2011 17:16:54 -0400 |
| parents | 5175bed443f9 |
| children | e1f5d9c4cc20 |
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--- a/src/c/urweb.c Sun Aug 28 14:43:30 2011 -0400 +++ b/src/c/urweb.c Sun Aug 28 17:16:54 2011 -0400 @@ -247,6 +247,13 @@ on_success = s; } +static void chastise(int (*send)(int sockfd, const void *buf, ssize_t len), int sock) { + send(sock, on_success, strlen(on_success)); + send(sock, begin_msgs, sizeof(begin_msgs) - 1); + send(sock, "R", 1); + close(sock); +} + void uw_client_connect(unsigned id, int pass, int sock, int (*send)(int sockfd, const void *buf, ssize_t len), int (*close)(int fd), @@ -254,7 +261,7 @@ client *c = find_client(id); if (c == NULL) { - close(sock); + chastise(send, sock); log_error(logger_data, "Out-of-bounds client request (%u)\n", id); return; } @@ -263,14 +270,14 @@ if (c->mode != USED) { pthread_mutex_unlock(&c->lock); - close(sock); + chastise(send, sock); log_error(logger_data, "Client request for unused slot (%u)\n", id); return; } if (pass != c->pass) { pthread_mutex_unlock(&c->lock); - close(sock); + chastise(send, sock); log_error(logger_data, "Wrong client password (%u, %d)\n", id, pass); return; } @@ -1342,7 +1349,8 @@ char *sig = ctx->needs_sig ? ctx->app->cookie_sig(ctx) : ""; char *r = uw_malloc(ctx, 59 + 3 * INTS_MAX + strlen(ctx->app->url_prefix) + (ctx->needs_sig ? strlen(sig) + 7 : 0)); - sprintf(r, "client_id=%u;client_pass=%d;url_prefix=\"%s\";timeout=%d;%s%s%slistener();", + sprintf(r, "isPost=%s;client_id=%u;client_pass=%d;url_prefix=\"%s\";timeout=%d;%s%s%slistener();", + (ctx->isPost ? "true" : "false"), ctx->client->id, ctx->client->pass, ctx->app->url_prefix,