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[mod_magnet] use blank str for nil (do not panic) 

substitute blank string for nil param (instead of lua script panic)
personal/stbuehler/tests-path
Glenn Strauss 2021-08-15 07:17:30 -04:00
parent 3ddf457560
commit c0ea7f8e27
1 changed files with 8 additions and 3 deletions
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11
src/mod_magnet.c
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@ -392,7 +392,12 @@ typedef struct {
static const_buffer magnet_checkconstbuffer(lua_State *L, int idx) {
const_buffer cb;
cb.ptr = luaL_checklstring(L, idx, &cb.len);
if (!lua_isnil(L, idx))
cb.ptr = luaL_checklstring(L, idx, &cb.len);
else {
cb.ptr = NULL;
cb.len = 0;
}
return cb;
}
@ -400,7 +405,7 @@ static const buffer* magnet_checkbuffer(lua_State *L, int idx, buffer *b) {
const_buffer cb = magnet_checkconstbuffer(L, idx);
/* assign result into (buffer *), and return (const buffer *)
* (note: caller must not free result) */
*(const char **)&b->ptr = cb.ptr;
*(const char **)&b->ptr = cb.ptr ? cb.ptr : "";
b->used = cb.len+1;
b->size = 0;
return b;
@ -420,7 +425,7 @@ static int magnet_stat_field(lua_State *L) {
stat_cache_entry * const sce = *(stat_cache_entry **)lua_touserdata(L, -2);
const_buffer k = magnet_checkconstbuffer(L, -1);
switch (k.ptr[0]) {
switch (k.len ? k.ptr[0] : 0) {
case 'c': { /* content-type */
if (0 != strcmp(k.ptr, "content-type")) break;
request_st * const r = magnet_get_request(L);