Lua server pages support

Makefile

@@ -22,8 +22,11 @@ all:
 ###                 UNIX build: linux, bsd, mac, rtems
 ##########################################################################
 
+# Add $(LUA_FLAGS) to CFLAGS below if you want to build with Lua
+LUA         = lua-5.2.1/src
+LUA_FLAGS   = -DUSE_LUA -I$(LUA) -L$(LUA) -llua -lm
+
 GCC_WARNS   = -W -Wall -pedantic
-#  -Wno-missing-field-initializers  -Wno-unused-parameter -Wno-format-zero-length -Wno-missing-braces
 CFLAGS      = -std=c99 -O2 $(GCC_WARNS) $(COPT)
 MAC_SHARED  = -flat_namespace -bundle -undefined suppress
 LINFLAGS    = -ldl -pthread $(CFLAGS)
@@ -64,14 +67,26 @@ CYA   = e:/cyassl-2.0.0rc2
 #DBG  = /Zi /DDEBUG /Od
 DBG   = /DNDEBUG /O1
 CL    = $(MSVC)/bin/cl /MD /TC /nologo $(DBG) /Gz /W3 /DNO_SSL_DL \
-        /I$(MSVC)/include
+        /I$(MSVC)/include /DUSE_LUA /I$(LUA)
 GUILIB= user32.lib shell32.lib
 LINK  = /link /incremental:no /libpath:$(MSVC)/lib /machine:IX86 \
-        /subsystem:windows ws2_32.lib advapi32.lib cyassl.lib
+        /subsystem:windows ws2_32.lib advapi32.lib cyassl.lib lua.lib
 CYAFL = /c /I $(CYA)/include -I $(CYA)/include/openssl /I$(MSVC)/INCLUDE \
         /I $(CYA)/ctaocrypt/include /D _LIB /D OPENSSL_EXTRA
 
-CYASRC= \
+LUA_SOURCES = $(LUA)/lapi.c $(LUA)/lcode.c $(LUA)/lctype.c \
+              $(LUA)/ldebug.c $(LUA)/ldo.c $(LUA)/ldump.c \
+              $(LUA)/lfunc.c $(LUA)/lgc.c $(LUA)/llex.c \
+              $(LUA)/lmem.c $(LUA)/lobject.c $(LUA)/lopcodes.c \
+              $(LUA)/lparser.c $(LUA)/lstate.c $(LUA)/lstring.c \
+              $(LUA)/ltable.c $(LUA)/ltm.c $(LUA)/lundump.c \
+              $(LUA)/lvm.c $(LUA)/lzio.c $(LUA)/lauxlib.c \
+              $(LUA)/lbaselib.c $(LUA)/lbitlib.c $(LUA)/lcorolib.c \
+              $(LUA)/ldblib.c $(LUA)/liolib.c $(LUA)/lmathlib.c \
+              $(LUA)/loslib.c $(LUA)/lstrlib.c $(LUA)/ltablib.c \
+              $(LUA)/loadlib.c $(LUA)/linit.c
+
+CYA_SOURCES = \
 	$(CYA)/src/cyassl_int.c \
 	$(CYA)/src/cyassl_io.c \
 	$(CYA)/src/keys.c \
@@ -104,10 +119,14 @@ CYASRC= \
 	$(CYA)/ctaocrypt/src/tfm.c
 
 cyassl.lib:
-	$(CL) $(CYASRC) $(CYAFL) $(DEF)
-	$(MSVC)/bin/lib *.obj /out:$@
+	$(CL) /Fo$(CYA)/ $(CYA_SOURCES) $(CYAFL) $(DEF)
+	$(MSVC)/bin/lib $(CYA)/*.obj /out:$@
+
+lua.lib:
+	$(CL) /c /Fo$(LUA)/ $(LUA_SOURCES)
+	$(MSVC)/bin/lib $(LUA_SOURCES:%.c=%.obj) /out:$@
 
-windows: cyassl.lib
+windows: cyassl.lib lua.lib
 	$(MSVC)/bin/rc win32\res.rc
 	$(CL) /I win32 main.c mongoose.c /GA $(LINK) win32\res.res \
 		$(GUILIB) /out:$(PROG).exe
@@ -144,4 +163,4 @@ release: clean
 	F=mongoose-`perl -lne '/define\s+MONGOOSE_VERSION\s+"(\S+)"/ and print $$1' mongoose.c`.tgz ; cd .. && tar -czf x mongoose/{LICENSE,Makefile,bindings,examples,test,win32,mongoose.c,mongoose.h,mongoose.1,main.c} && mv x mongoose/$$F
 
 clean:
-	rm -rf *.o *.core $(PROG) *.obj *.so $(PROG).txt *.dSYM *.tgz $(PROG).exe *.dll *.lib
+	rm -rf *.o *.core $(PROG) *.obj *.so $(PROG).txt *.dSYM *.tgz $(PROG).exe *.dll *.lib

mongoose.c

@@ -218,6 +218,11 @@ typedef int SOCKET;
 
 #include "mongoose.h"
 
+#ifdef USE_LUA
+#include <lua.h>
+#include <lauxlib.h>
+#endif
+
 #define MONGOOSE_VERSION "3.4"
 #define PASSWORDS_FILE_NAME ".htpasswd"
 #define CGI_ENVIRONMENT_SIZE 4096
@@ -1530,7 +1535,7 @@ int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
       conn->last_throttle_bytes += total;
       while (total < (int64_t) len && conn->ctx->stop_flag == 0) {
         allowed = conn->throttle > (int64_t) len - total ?
-          len - total : conn->throttle;
+          (int64_t) len - total : conn->throttle;
         if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
                       (int64_t) allowed)) != allowed) {
           break;
@@ -3835,6 +3840,152 @@ static uint32_t get_remote_ip(const struct mg_connection *conn) {
   return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr);
 }
 
+#ifdef USE_LUA
+
+#ifdef _WIN32
+static void *mmap(void *addr, int64_t len, int prot, int flags, int fd,
+                  int offset) {
+  HANDLE fh = (HANDLE) _get_osfhandle(fd);
+  HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0);
+  void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len);
+  CloseHandle(fh);
+  CloseHandle(mh);
+  return p;
+}
+#define munmap(x, y)  UnmapViewOfFile(x)
+#define MAP_FAILED NULL
+#define PROT_READ 0
+#else
+#include <sys/mman.h>
+#endif
+
+static void lsp(struct mg_connection *conn, const char *p, int64_t len,
+                lua_State *L) {
+  int i, j, pos = 0;
+
+  for (i = 0; i < len; i++) {
+    if (p[i] == '<' && p[i + 1] == '?') {
+      for (j = i + 1; j < len ; j++) {
+        if (p[j] == '?' && p[j + 1] == '>') {
+          mg_write(conn, p + pos, i - pos);
+          if (luaL_loadbuffer(L, p + (i + 2), j - (i + 2), "") == LUA_OK) {
+            lua_pcall(L, 0, LUA_MULTRET, 0);
+          }
+          pos = j + 2;
+          i = pos - 1;
+          break;
+        }
+      }
+    }
+  }
+
+  if (i > pos) {
+    mg_write(conn, p + pos, i - pos);
+  }
+}
+
+static int lsp_mg_print(lua_State *L) {
+  int i, num_args;
+  const char *str;
+  size_t size;
+  struct mg_connection *conn = lua_touserdata(L, lua_upvalueindex(1));
+
+  num_args = lua_gettop(L);
+  for (i = 1; i <= num_args; i++) {
+    if (lua_isstring(L, i)) {
+      str = lua_tolstring(L, i, &size);
+      mg_write(conn, str, size);
+    }
+  }
+
+  return 0;
+}
+
+static int lsp_mg_read(lua_State *L) {
+  struct mg_connection *conn = lua_touserdata(L, lua_upvalueindex(1));
+  char buf[1024];
+  int len = mg_read(conn, buf, sizeof(buf));
+
+  lua_settop(L, 0);
+  lua_pushlstring(L, buf, len);
+
+  return 1;
+}
+
+static void reg_string(struct lua_State *L, const char *name, const char *val) {
+  lua_pushstring(L, name);
+  lua_pushstring(L, val);
+  lua_rawset(L, -3);
+}
+
+static void reg_int(struct lua_State *L, const char *name, int val) {
+  lua_pushstring(L, name);
+  lua_pushinteger(L, val);
+  lua_rawset(L, -3);
+}
+
+static void prepare_lua_environment(struct mg_connection *conn, lua_State *L) {
+  const struct mg_request_info *ri = mg_get_request_info(conn);
+  extern void luaL_openlibs(lua_State *);
+  int i;
+
+  luaL_openlibs(L);
+
+  // Register "print" function which calls mg_write()
+  lua_pushlightuserdata(L, conn);
+  lua_pushcclosure(L, lsp_mg_print, 1);
+  lua_setglobal(L, "print");
+
+  // Register mg_read()
+  lua_pushlightuserdata(L, conn);
+  lua_pushcclosure(L, lsp_mg_read, 1);
+  lua_setglobal(L, "read");
+
+  // Export request_info
+  lua_newtable(L);
+  reg_string(L, "request_method", ri->request_method);
+  reg_string(L, "uri", ri->uri);
+  reg_string(L, "http_version", ri->http_version);
+  reg_string(L, "query_string", ri->query_string);
+  reg_int(L, "remote_ip", ri->remote_ip);
+  reg_int(L, "remote_port", ri->remote_port);
+  reg_int(L, "num_headers", ri->num_headers);
+  lua_pushstring(L, "http_headers");
+  lua_newtable(L);
+  for (i = 0; i < ri->num_headers; i++) {
+    reg_string(L, ri->http_headers[i].name, ri->http_headers[i].value);
+  }
+  lua_rawset(L, -3);
+  lua_setglobal(L, "request_info");
+}
+
+static void handle_lsp_request(struct mg_connection *conn, const char *path,
+                               const struct mgstat *st) {
+  void *p = NULL;
+  FILE *fp = NULL;
+  lua_State *L = NULL;
+
+  if ((fp = fopen(path, "r")) == NULL) {
+    send_http_error(conn, 404, "Not Found", "%s", "File not found");
+  } else if ((p = mmap(NULL, st->size, PROT_READ, 0,
+                       fileno(fp), 0)) == MAP_FAILED) {
+    send_http_error(conn, 500, http_500_error, "%s", "x");
+  } else if ((L = luaL_newstate()) == NULL) {
+    send_http_error(conn, 500, http_500_error, "%s", "y");
+  } else {
+    mg_printf(conn, "%s", "HTTP/1.1 200 OK\r\n"
+              "Content-Type: text/html\r\nConnection: close\r\n\r\n");
+    prepare_lua_environment(conn, L);
+    lsp(conn, p, st->size, L);
+  }
+
+  if (L) lua_close(L);
+  if (p) munmap(p, st->size);
+  if (fp) fclose(fp);
+
+}
+#endif // USE_LUA
+
 // This is the heart of the Mongoose's logic.
 // This function is called when the request is read, parsed and validated,
 // and Mongoose must decide what action to take: serve a file, or
@@ -3897,6 +4048,10 @@ static void handle_request(struct mg_connection *conn) {
       send_http_error(conn, 403, "Directory Listing Denied",
           "Directory listing denied");
     }
+#ifdef USE_LUA
+  } else if (match_prefix("**.lsp$", 7, path) > 0) {
+    handle_lsp_request(conn, path, &st);
+#endif
 #if !defined(NO_CGI)
   } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
                           strlen(conn->ctx->config[CGI_EXTENSIONS]),

test/page.lsp

@@ -0,0 +1,40 @@
+<html>
+  <p>Prime numbers from 0 to 100, calculated by Lua:</p>
+ <?
+
+    function is_prime(n)
+      if n <= 0 then return false end
+      if n <= 2 then return true end
+      if (n % 2 == 0) then return false end
+      for i = 3, n / 2, 2 do
+        if (n % i == 0) then return false end
+      end
+      return true
+    end
+
+    for i = 1, 100 do
+      if is_prime(i) then print('<span>' .. i .. '</span>&nbsp;') end
+    end
+
+ ?>
+
+ <p>Reading POST data from Lua (click submit):</p>
+ <form method="POST"><input type="text" name="t1"/><input type="submit"></form>
+
+ <pre>
+   POST data: [<?  post_data = read() print(post_data) ?>]
+   request method: [<? print(request_info.request_method) ?>]
+   IP/port: [<? print(request_info.remote_ip, ':', request_info.remote_port) ?>]
+   URI: [<? print(request_info.uri) ?>]
+   HTTP version [<? print(request_info.http_version) ?>]
+   HEADERS:
+   <? 
+     for name, value in pairs(request_info.http_headers) do
+       print(name, ':', value, '\n')
+     end
+   ?>
+     
+ </pre>
+
+
+</html>

test/unit_test.c

@@ -31,7 +31,7 @@ static void test_parse_http_request() {
   ASSERT(strcmp(ri.http_headers[2].name, "baz\r\n\r") == 0);
   ASSERT(strcmp(ri.http_headers[2].value, "") == 0);
 
-  // TODO(lsm): add more tests. 
+  // TODO(lsm): add more tests.
 }
 
 static void test_should_keep_alive(void) {
@@ -210,18 +210,18 @@ static void test_base64_encode(void) {
 static void test_mg_get_var(void) {
   static const char *post[] = {"a=1&&b=2&d&=&c=3%20&e=", NULL};
   char buf[20];
-  
+
   ASSERT(mg_get_var(post[0], strlen(post[0]), "a", buf, sizeof(buf)) == 1);
   ASSERT(buf[0] == '1' && buf[1] == '\0');
   ASSERT(mg_get_var(post[0], strlen(post[0]), "b", buf, sizeof(buf)) == 1);
   ASSERT(buf[0] == '2' && buf[1] == '\0');
-  ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, sizeof(buf)) == 2);  
+  ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, sizeof(buf)) == 2);
   ASSERT(buf[0] == '3' && buf[1] == ' ' && buf[2] == '\0');
   ASSERT(mg_get_var(post[0], strlen(post[0]), "e", buf, sizeof(buf)) == 0);
   ASSERT(buf[0] == '\0');
 
-  ASSERT(mg_get_var(post[0], strlen(post[0]), "d", buf, sizeof(buf)) == -1);  
-  ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, 2) == -1);  
+  ASSERT(mg_get_var(post[0], strlen(post[0]), "d", buf, sizeof(buf)) == -1);
+  ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, 2) == -1);
 
   ASSERT(mg_get_var(post[0], strlen(post[0]), "x", NULL, 10) == -2);
   ASSERT(mg_get_var(post[0], strlen(post[0]), "x", buf, 0) == -2);
@@ -255,6 +255,54 @@ static void test_next_option(void) {
   }
 }
 
+#ifdef USE_LUA
+static void check_lua_expr(lua_State *L, const char *expr, const char *value) {
+  const char *v, *var_name = "myVar";
+  char buf[100];
+
+  snprintf(buf, sizeof(buf), "%s = %s", var_name, expr);
+  luaL_dostring(L, buf);
+  lua_getglobal(L, var_name);
+  v = lua_tostring(L, -1);
+  printf("%s: %s: [%s] [%s]\n", __func__, expr, v == NULL ? "null" : v, value);
+  ASSERT((value == NULL && v == NULL) ||
+         (value != NULL && v != NULL && !strcmp(value, v)));
+}
+
+static void test_lua(void) {
+  static struct mg_connection conn;
+  static struct mg_context ctx;
+
+  char http_request[] = "POST /foo/bar HTTP/1.1\r\n"
+      "Content-Length: 12\r\n"
+      "Connection: close\r\n\r\nhello world!";
+  const char *page = "<? print('hi') ?>";
+  lua_State *L = luaL_newstate();
+
+  conn.ctx = &ctx;
+  conn.buf = http_request;
+  conn.buf_size = conn.data_len = strlen(http_request);
+  conn.request_len = parse_http_request(conn.buf, conn.data_len,
+                                        &conn.request_info);
+  conn.content_len = conn.data_len - conn.request_len;
+
+  prepare_lua_environment(&conn, L);
+  ASSERT(lua_gettop(L) == 0);
+
+  check_lua_expr(L, "'hi'", "hi");
+  check_lua_expr(L, "request_info.request_method", "POST");
+  check_lua_expr(L, "request_info.uri", "/foo/bar");
+  check_lua_expr(L, "request_info.num_headers", "2");
+  check_lua_expr(L, "request_info.remote_ip", "0");
+  check_lua_expr(L, "request_info.http_headers['Content-Length']", "12");
+  check_lua_expr(L, "request_info.http_headers['Connection']", "close");
+  luaL_dostring(L, "post = read()");
+  check_lua_expr(L, "# post", "12");
+  check_lua_expr(L, "post", "hello world!");
+  lua_close(L);
+}
+#endif
+
 int main(void) {
   test_base64_encode();
   test_match_prefix();
@@ -265,5 +313,8 @@ int main(void) {
   test_mg_get_var();
   test_set_throttle();
   test_next_option();
+#ifdef USE_LUA
+  test_lua();
+#endif
   return 0;
 }