[Minor] Add some initial workarounds for broken CT

diff --git a/src/libmime/content_type.c b/src/libmime/content_type.c
index fa9768bf4768038b3650e2185a365a259c1f23a8..934c12eab7087c1f84c0a1015fcb7a3ee5cd1a41 100644 (file)
--- a/src/libmime/content_type.c
+++ b/src/libmime/content_type.c
@@ -66,6 +66,7 @@ rspamd_content_type_parse (const gchar *in,
                gsize len, rspamd_mempool_t *pool)
 {
        struct rspamd_content_type *res = NULL, val;
+       rspamd_ftok_t srch;
 
        val.lc_data = rspamd_mempool_alloc (pool, len);
        memcpy (val.lc_data, in, len);
@@ -79,6 +80,40 @@ rspamd_content_type_parse (const gchar *in,
                        rspamd_mempool_add_destructor (pool,
                                        (rspamd_mempool_destruct_t)g_hash_table_unref, res->attrs);
                }
+
+               /* Now do some hacks to work with broken content types */
+               if (res->subtype.len == 0) {
+                       srch.begin = "text";
+                       srch.len = 4;
+
+                       if (rspamd_ftok_cmp (&res->type, &srch) == 0) {
+                               /* Workaround for Content-Type: text */
+                               /* Assume text/plain */
+                               res->subtype.begin = "plain";
+                               res->subtype.len = 5;
+                       }
+                       else {
+                               srch.begin = "html";
+                               srch.len = 4;
+
+                               if (rspamd_ftok_cmp (&res->type, &srch) == 0) {
+                                       /* Workaround for Content-Type: html */
+                                       res->type.begin = "text";
+                                       res->type.len = 4;
+                                       res->subtype.begin = "html";
+                                       res->subtype.len = 4;
+                               }
+                               else {
+                                       srch.begin = "application";
+                                       srch.len = 11;
+
+                                       if (rspamd_ftok_cmp (&res->type, &srch) == 0) {
+                                               res->subtype.begin = "octet-stream";
+                                               res->subtype.len = 12;
+                                       }
+                               }
+                       }
+               }
        }
        else {
                msg_warn_pool ("cannot parse content type: %*s", (gint)len, val.lc_data);