MINOR: hlua: Add error message relative to the Channel manipulation and HTTP mode

When the developper try to manipulate HAProxy channels in HTTP mode,
an error throws without explanation. This patch adds an explanation.

diff --git a/src/hlua.c b/src/hlua.c
index 6ec69e4cf3ea1554fbd24b37926b426908e52ea3..1eac9d10678ab503993a9c9e82d183061821955a 100644 (file)
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -2852,8 +2852,10 @@ __LJMP static int hlua_channel_dup_yield(lua_State *L, int status, lua_KContext
 
        chn = MAY_LJMP(hlua_checkchannel(L, 1));
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        if (_hlua_channel_dup(chn, L) == 0)
                MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_dup_yield, TICK_ETERNITY, 0));
@@ -2880,8 +2882,10 @@ __LJMP static int hlua_channel_get_yield(lua_State *L, int status, lua_KContext
 
        chn = MAY_LJMP(hlua_checkchannel(L, 1));
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        ret = _hlua_channel_dup(chn, L);
        if (unlikely(ret == 0))
@@ -2920,8 +2924,10 @@ __LJMP static int hlua_channel_getline_yield(lua_State *L, int status, lua_KCont
 
        chn = MAY_LJMP(hlua_checkchannel(L, 1));
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        ret = ci_getline_nc(chn, &blk1, &len1, &blk2, &len2);
        if (ret == 0)
@@ -2968,8 +2974,10 @@ __LJMP static int hlua_channel_append_yield(lua_State *L, int status, lua_KConte
        int ret;
        int max;
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        /* Check if the buffer is available because HAProxy doesn't allocate
         * the request buffer if its not required.
@@ -3040,8 +3048,10 @@ __LJMP static int hlua_channel_set(lua_State *L)
        chn = MAY_LJMP(hlua_checkchannel(L, 1));
        lua_pushinteger(L, 0);
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        b_set_data(&chn->buf, co_data(chn));
 
@@ -3062,8 +3072,10 @@ __LJMP static int hlua_channel_send_yield(lua_State *L, int status, lua_KContext
        int max;
        struct hlua *hlua = hlua_gethlua(L);
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        if (unlikely(channel_output_closed(chn))) {
                lua_pushinteger(L, -1);
@@ -3166,8 +3178,10 @@ __LJMP static int hlua_channel_forward_yield(lua_State *L, int status, lua_KCont
 
        chn = MAY_LJMP(hlua_checkchannel(L, 1));
 
-       if (chn_strm(chn)->be->mode == PR_MODE_HTTP)
+       if (chn_strm(chn)->be->mode == PR_MODE_HTTP) {
+               lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
                WILL_LJMP(lua_error(L));
+       }
 
        len = MAY_LJMP(luaL_checkinteger(L, 2));
        l = MAY_LJMP(luaL_checkinteger(L, -1));