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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [rtems_webserver/] [form.c] - Blame information for rev 261

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1 30 unneback 
/*
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 * form.c -- Form processing (in-memory CGI) for the GoAhead Web server
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 *
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 * Copyright (c) Go Ahead Software Inc., 1995-1999. All Rights Reserved.
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 *
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 * See the file "license.txt" for usage and redistribution license requirements
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 */
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/********************************** Description *******************************/
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/*
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 *      This module implements the /goform handler. It emulates CGI processing
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 *      but performs this in-process and not as an external process. This enables
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 *      a very high performance implementation with easy parsing and decoding
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 *      of query strings and posted data.
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 */
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/*********************************** Includes *********************************/
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#include        "wsIntrn.h"
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/************************************ Locals **********************************/
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static sym_fd_t formSymtab = -1;                        /* Symbol table for form handlers */
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/************************************* Code ***********************************/
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/*
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 *      Process a form request. Returns 1 always to indicate it handled the URL
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 */
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int websFormHandler(webs_t wp, char_t *urlPrefix, char_t *webDir, int arg,
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        char_t *url, char_t *path, char_t* query)
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{
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        sym_t           *sp;
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        char_t          formBuf[FNAMESIZE];
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        char_t          *cp, *formName;
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        int                     (*fn)(void *sock, char_t* path, char_t *args);
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        a_assert(websValid(wp));
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        a_assert(url && *url);
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        a_assert(path && *path == '/');
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        websStats.formHits++;
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/*
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 *      Extract the form name
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 */
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        gstrncpy(formBuf, path, TSZ(formBuf));
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        if ((formName = gstrchr(&formBuf[1], '/')) == NULL) {
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                websError(wp, 200, T("Missing form name"));
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                return 1;
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        }
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        formName++;
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        if ((cp = gstrchr(formName, '/')) != NULL) {
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                *cp = '\0';
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        }
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/*
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 *      Lookup the C form function first and then try tcl (no javascript support
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 *      yet).
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 */
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        sp = symLookup(formSymtab, formName);
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        if (sp == NULL) {
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                websError(wp, 200, T("Form %s is not defined"), formName);
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        } else {
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                fn = (int (*)(void*, char_t*, char_t*)) sp->content.value.integer;
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                a_assert(fn);
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                if (fn) {
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/*
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 *                      For good practice, forms must call websDone()
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 */
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                        (*fn)((void*) wp, formName, query);
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                        if (websValid(wp)) {
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                                websError(wp, 200, T("Form didn't call websDone"));
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                        }
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                }
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        }
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        return 1;
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}
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/******************************************************************************/
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/*
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 *      Define a form function in the "form" map space.
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 */
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int websFormDefine(char_t *name, void (*fn)(webs_t wp, char_t *path,
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        char_t *query))
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{
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        static int once = 0;
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        a_assert(name && *name);
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        a_assert(fn);
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        if (fn == NULL) {
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                return -1;
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        }
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        if (once++ == 0) {
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                websFormOpen();
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        }
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        symEnter(formSymtab, name, valueInteger((int) fn), (int) NULL);
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        return 0;
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}
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/******************************************************************************/
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/*
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 *      Open the symbol table for forms.
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 */
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void websFormOpen()
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{
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        formSymtab = symOpen(64);
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}
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/******************************************************************************/
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/*
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 *      Close the symbol table for forms.
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 */
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void websFormClose()
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{
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        if (formSymtab != -1) {
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                symClose(formSymtab, NULL);
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        }
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}
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/******************************************************************************/
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/*
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 *      Write a webs header. This is a convenience routine to write a common
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 *      header for a form back to the browser.
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 */
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void websHeader(webs_t wp)
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{
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        a_assert(websValid(wp));
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        websWrite(wp, T("HTTP/1.0 200 OK\n"));
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/*
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 *      By license terms the following line of code must not be modified
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 */
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        websWrite(wp, T("Server: GoAhead-Webs\r\n"));
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        websWrite(wp, T("Pragma: no-cache\n"));
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        websWrite(wp, T("Cache-control: no-cache\n"));
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        websWrite(wp, T("Content-Type: text/html\n"));
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        websWrite(wp, T("\n"));
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        websWrite(wp, T("<html>\n"));
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}
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/******************************************************************************/
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/*
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 *      Write a webs footer
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 */
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void websFooter(webs_t wp)
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{
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        a_assert(websValid(wp));
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        websWrite(wp, T("</html>\n"));
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}
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/******************************************************************************/

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