📄 form.c
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/* * form.c -- Form processing (in-memory CGI) for the GoAhead Web server * * Copyright (c) GoAhead Software Inc., 1995-2000. All Rights Reserved. * * See the file "license.txt" for usage and redistribution license requirements * * $Id: form.c,v 1.3 2002/10/24 14:44:50 bporter Exp $ *//********************************** Description *******************************//* * This module implements the /goform handler. It emulates CGI processing * but performs this in-process and not as an external process. This enables * a very high performance implementation with easy parsing and decoding * of query strings and posted data. *//*********************************** Includes *********************************/#include "wsIntrn.h"/************************************ Locals **********************************/static sym_fd_t formSymtab = -1; /* Symbol table for form handlers *//************************************* Code ***********************************//* * Process a form request. Returns 1 always to indicate it handled the URL */int websFormHandler(webs_t wp, char_t *urlPrefix, char_t *webDir, int arg, char_t *url, char_t *path, char_t *query){ sym_t *sp; char_t formBuf[FNAMESIZE]; char_t *cp, *formName; int (*fn)(void *sock, char_t *path, char_t *args); a_assert(websValid(wp)); a_assert(url && *url); a_assert(path && *path == '/'); websStats.formHits++;/* * Extract the form name */ gstrncpy(formBuf, path, TSZ(formBuf)); if ((formName = gstrchr(&formBuf[1], '/')) == NULL) { websError(wp, 200, T("Missing form name")); return 1; } formName++; if ((cp = gstrchr(formName, '/')) != NULL) { *cp = '\0'; }/* * Lookup the C form function first and then try tcl (no javascript support * yet). */ sp = symLookup(formSymtab, formName); if (sp == NULL) { websError(wp, 200, T("Form %s is not defined"), formName); } else { fn = (int (*)(void *, char_t *, char_t *)) sp->content.value.integer; a_assert(fn); if (fn) {/* * For good practice, forms must call websDone() */ (*fn)((void*) wp, formName, query);/* * Remove the test to force websDone, since this prevents * the server "push" from a form> */#if 0 /* push */ if (websValid(wp)) { websError(wp, 200, T("Form didn't call websDone")); }#endif /* push */ } } return 1;}/******************************************************************************//* * Define a form function in the "form" map space. */int websFormDefine(char_t *name, void (*fn)(webs_t wp, char_t *path, char_t *query)){ a_assert(name && *name); a_assert(fn); if (fn == NULL) { return -1; } symEnter(formSymtab, name, valueInteger((int) fn), (int) NULL); return 0;}/******************************************************************************//* * Open the symbol table for forms. */void websFormOpen(){ formSymtab = symOpen(WEBS_SYM_INIT);}/******************************************************************************//* * Close the symbol table for forms. */void websFormClose(){ if (formSymtab != -1) { symClose(formSymtab); formSymtab = -1; }}/******************************************************************************//* * Write a webs header. This is a convenience routine to write a common * header for a form back to the browser. */void websHeader(webs_t wp){ a_assert(websValid(wp)); websWrite(wp, T("HTTP/1.0 200 OK\n"));/* * By license terms the following line of code must not be modified */ websWrite(wp, T("Server: %s\r\n"), WEBS_NAME); websWrite(wp, T("Pragma: no-cache\n")); websWrite(wp, T("Cache-control: no-cache\n")); websWrite(wp, T("Content-Type: text/html\n")); websWrite(wp, T("\n")); websWrite(wp, T("<html>\n"));}/******************************************************************************//* * Write a webs footer */void websFooter(webs_t wp){ a_assert(websValid(wp)); websWrite(wp, T("</html>\n"));}/******************************************************************************/⌨️ 快捷键说明
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