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Add Lua compiler

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Redbean Lua Server Pages may now be stored in the zip as byte code. This
can improve performance, since redbean currently doesn't cache byte code
but it might be more useful for anyone wanting to create a closed source
redbean. The .lua extension should be used for byte code files. Lua will
tell them apart based on a magic number at the start of the file.

This change also improves some Lua error reporting conditions. See #97
This commit is contained in:
Justine Tunney 2021-08-09 13:09:14 -07:00
parent b703eee96e
commit 3bfb7580c5
16 changed files with 864 additions and 91 deletions
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50
tool/net/redbean.c
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@ -3146,14 +3146,20 @@ static char *LuaOnHttpRequest(void) {
static char *ServeLua(struct Asset *a, const char *s, size_t n) {
char *code;
size_t codelen;
LockInc(&shared->c.dynamicrequests);
effectivepath.p = s;
effectivepath.n = n;
if ((code = FreeLater(LoadAsset(a, NULL)))) {
if (luaL_dostring(L, code) == LUA_OK) {
if ((code = FreeLater(LoadAsset(a, &codelen)))) {
if (!luaL_loadbufferx(L, code, codelen, FreeLater(strndup(s, n)), 0) &&
!lua_pcall(L, 0, LUA_MULTRET, 0)) {
return CommitOutput(GetLuaResponse());
} else {
WARNF("%s", lua_tostring(L, -1));
WARNF("failed to run lua code %s", lua_tostring(L, -1));
/*
* TODO: Print backtrace, and then serve Django-like error page if
* and only if IsLoopbackIp(GetRemoteAddr())
*/
lua_pop(L, 1);
}
}
@ -4999,21 +5005,27 @@ static int LuaHidePath(lua_State *L) {
static int LuaLog(lua_State *L) {
int level;
char *module;
lua_Debug ar;
const char *msg;
const char *msg, *module;
level = luaL_checkinteger(L, 1);
if (LOGGABLE(level)) {
/*
* TODO: There needs to be some reasonable way to get the source
* filename and line number.
*/
msg = luaL_checkstring(L, 2);
lua_getstack(L, 0, &ar);
lua_getinfo(L, "nSl", &ar);
if (!strcmp(ar.name, "main")) {
module = strndup(effectivepath.p, effectivepath.n);
flogf(level, module, ar.currentline, NULL, "%s", msg);
free(module);
if (ar.source) {
module = ar.source;
} else {
module = gc(strndup(effectivepath.p, effectivepath.n));
}
} else {
flogf(level, ar.name, ar.currentline, NULL, "%s", msg);
module = ar.name;
}
flogf(level, module, ar.currentline, NULL, "%s", msg);
}
return 0;
}
@ -5298,21 +5310,25 @@ static int LuaRe(lua_State *L) {
}
static bool LuaRun(const char *path, bool mandatory) {
size_t pathlen;
struct Asset *a;
const char *code;
size_t pathlen, codelen;
pathlen = strlen(path);
if ((a = GetAsset(path, pathlen))) {
if ((code = LoadAsset(a, NULL))) {
if ((code = LoadAsset(a, &codelen))) {
effectivepath.p = path;
effectivepath.n = pathlen;
DEBUGF("LuaRun(%`'s)", path);
if (luaL_dostring(L, code) != LUA_OK) {
if (mandatory) {
FATALF("%s %s", path, lua_tostring(L, -1));
} else {
WARNF("%s %s", path, lua_tostring(L, -1));
}
if (luaL_loadbufferx(L, code, codelen, path, 0) ||
lua_pcall(L, 0, LUA_MULTRET, 0)) {
/*
* TODO: There needs to be some reasonable way to get a
* backtrace. The best thing about Django was the
* fabulous backtrace page (and the admin panel).
*/
/* luaL_traceback(L, L, lua_tostring(L, -1), 0); */
WARNF("script failed to run %s", lua_tostring(L, -1));
if (mandatory) exit(1);
lua_pop(L, 1);
}
free(code);