/*
* asp.c -- Active Server Page Support
*
* Copyright (c) GoAhead Software Inc., 1995-2000. All Rights Reserved.
*
* See the file "license.txt" for usage and redistribution license requirements
*/
/******************************** Description *********************************/
/*
* The ASP module processes ASP pages and executes embedded scripts. It
* support an open scripting architecture with in-built support for
* Ejscript(TM).
*/
/********************************* Includes ***********************************/
#include "wsIntrn.h"
/********************************** Locals ************************************/
static sym_fd_t websAspFunctions = -1; /* Symbol table of functions */
static int aspOpenCount = 0; /* count of apps using this module */
/***************************** Forward Declarations ***************************/
static char_t *strtokcmp(char_t *s1, char_t *s2);
static char_t *skipWhite(char_t *s);
/************************************* Code ***********************************/
/*
* Create script spaces and commands
*/
int websAspOpen()
{
if (++aspOpenCount == 1) {
/*
* Create the table for ASP functions
*/
websAspFunctions = symOpen(WEBS_SYM_INIT * 2);
/*
* Create standard ASP commands
*/
websAspDefine(T("write"), websAspWrite);
}
return 0;
}
/************************************* Code ***********************************/
/*
* Close Asp symbol table.
*/
void websAspClose()
{
if (--aspOpenCount <= 0) {
if (websAspFunctions != -1) {
symClose(websAspFunctions);
websAspFunctions = -1;
}
}
}
/******************************************************************************/
/*
* Process ASP requests and expand all scripting commands. We read the
* entire ASP page into memory and then process. If you have really big
* documents, it is better to make them plain HTML files rather than ASPs.
*/
int websAspRequest(webs_t wp, char_t *lpath)
{
websStatType sbuf;
char *rbuf;
char_t *token, *lang, *result, *path, *ep, *cp, *buf, *nextp;
char_t *last;
int rc, engine, len, ejid;
a_assert(websValid(wp));
a_assert(lpath && *lpath);
rc = -1;
buf = NULL;
rbuf = NULL;
engine = EMF_SCRIPT_EJSCRIPT;
wp->flags |= WEBS_HEADER_DONE;
path = websGetRequestPath(wp);
/*
* Create Ejscript instance in case it is needed
*/
ejid = ejOpenEngine(wp->cgiVars, websAspFunctions);
if (ejid < 0) {
websError(wp, 200, T("Can't create Ejscript engine"));
goto done;
}
ejSetUserHandle(ejid, (int) wp);
if (websPageStat(wp, lpath, path, &sbuf) < 0) {
websError(wp, 200, T("Can't stat %s"), lpath);
goto done;
}
/*
* Create a buffer to hold the ASP file in-memory
*/
len = sbuf.size * sizeof(char);
if ((rbuf = balloc(B_L, len + 1)) == NULL) {
websError(wp, 200, T("Can't get memory"));
goto done;
}
rbuf[len] = '\0';
if (websPageReadData(wp, rbuf, len) != len) {
websError(wp, 200, T("Cant read %s"), lpath);
goto done;
}
websPageClose(wp);
/*
* Convert to UNICODE if necessary.
*/
if ((buf = ballocAscToUni(rbuf, len)) == NULL) {
websError(wp, 200, T("Can't get memory"));
goto done;
}
/*
* Scan for the next "<%"
*/
last = buf;
rc = 0;
while (rc == 0 && *last && ((nextp = gstrstr(last, T("<%"))) != NULL)) {
websWriteBlock(wp, last, (nextp - last));
nextp = skipWhite(nextp + 2);
/*
* Decode the language
*/
token = T("language");
if ((lang = strtokcmp(nextp, token)) != NULL) {
if ((cp = strtokcmp(lang, T("=javascript"))) != NULL) {
engine = EMF_SCRIPT_EJSCRIPT;
} else {
cp = nextp;
}
nextp = cp;
}
/*
* Find tailing bracket and then evaluate the script
*/
if ((ep = gstrstr(nextp, T("%>"))) != NULL) {
*ep = '\0';
last = ep + 2;
nextp = skipWhite(nextp);
/*
* Handle backquoted newlines
*/
for (cp = nextp; *cp; ) {
if (*cp == '\\' && (cp[1] == '\r' || cp[1] == '\n')) {
*cp++ = ' ';
while (*cp == '\r' || *cp == '\n') {
*cp++ = ' ';
}
} else {
cp++;
}
}
/*
* Now call the relevant script engine. Output is done directly
* by the ASP script procedure by calling websWrite()
*/
if (*nextp) {
result = NULL;
if (engine == EMF_SCRIPT_EJSCRIPT) {
rc = scriptEval(engine, nextp, &result, ejid);
} else {
rc = scriptEval(engine, nextp, &result, (int) wp);
}
if (rc < 0) {
/*
* On an error, discard all output accumulated so far
* and store the error in the result buffer. Be careful if the
* user has called websError() already.
*/
if (websValid(wp)) {
if (result) {
websWrite(wp, T("<h2><b>ASP Error: %s</b></h2>\n"),
result);
websWrite(wp, T("<pre>%s</pre>"), nextp);
bfree(B_L, result);
} else {
websWrite(wp, T("<h2><b>ASP Error</b></h2>\n%s\n"),
nextp);
}
websWrite(wp, T("</body></html>\n"));
rc = 0;
}
goto done;
}
}
} else {
websError(wp, 200, T("Unterminated script in %s: \n"), lpath);
rc = -1;
goto done;
}
}
/*
* Output any trailing HTML page text
*/
if (last && *last && rc == 0) {
websWriteBlock(wp, last, gstrlen(last));
}
rc = 0;
/*
* Common exit and cleanup
*/
done:
if (websValid(wp)) {
websPageClose(wp);
if (ejid >= 0) {
ejCloseEngine(ejid);
}
}
bfreeSafe(B_L, buf);
bfreeSafe(B_L, rbuf);
return rc;
}
/******************************************************************************/
/*
* Define an ASP Ejscript function. Bind an ASP name to a C procedure.
*/
int websAspDefine(char_t *name,
int (*fn)(int ejid, webs_t wp, int argc, char_t **argv))
{
return ejSetGlobalFunctionDirect(websAspFunctions, name,
(int (*)(int, void*, int, char_t**)) fn);
}
/******************************************************************************/
/*
* Asp write command. This implemements <% write("text"); %> command
*/
int websAspWrite(int ejid, webs_t wp, int argc, char_t **argv)
{
int i;
a_assert(websValid(wp));
for (i = 0; i < argc; ) {
a_assert(argv);
if (websWriteBlock(wp, argv[i], gstrlen(argv[i])) < 0) {
return -1;
}
if (++i < argc) {
if (websWriteBlock(wp, T(" "), 2) < 0) {
return -1;
}
}
}
return 0;
}
/******************************************************************************/
/*
* strtokcmp -- Find s2 in s1. We skip leading white space in s1.
* Return a pointer to the location in s1 after s2 ends.
*/
static char_t *strtokcmp(char_t *s1, char_t *s2)
{
int len;
s1 = skipWhite(s1);
len = gstrlen(s2);
for (len = gstrlen(s2); len > 0 && (tolower(*s1) == tolower(*s2)); len--) {
if (*s2 == '\0') {
return s1;
}
s1++;
s2++;
}
if (len == 0) {
return s1;
}
return NULL;
}
/******************************************************************************/
/*
* Skip white space
*/
static char_t *skipWhite(char_t *s)
{
a_assert(s);
if (s == NULL) {
return s;
}
while (*s && gisspace(*s)) {
s++;
}
return s;
}
/******************************************************************************/
