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/**
* @file agCgi.c
*
* Time-stamp: "2012-03-04 19:19:12 bkorb"
*
* This is a CGI wrapper for AutoGen. It will take POST-method
* name-value pairs and emit AutoGen definitions to a spawned
* AutoGen process.
*
* This file is part of AutoGen.
* AutoGen Copyright (c) 1992-2012 by Bruce Korb - all rights reserved
*
* AutoGen is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* AutoGen is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
typedef struct {
char const* pzName;
char* pzValue;
} tNameMap;
#define ENV_TABLE \
_ET_(SERVER_SOFTWARE) \
_ET_(SERVER_NAME) \
_ET_(GATEWAY_INTERFACE) \
_ET_(SERVER_PROTOCOL) \
_ET_(SERVER_PORT) \
_ET_(REQUEST_METHOD) \
_ET_(PATH_INFO) \
_ET_(PATH_TRANSLATED) \
_ET_(SCRIPT_NAME) \
_ET_(QUERY_STRING) \
_ET_(REMOTE_HOST) \
_ET_(REMOTE_ADDR) \
_ET_(AUTH_TYPE) \
_ET_(REMOTE_USER) \
_ET_(REMOTE_IDENT) \
_ET_(CONTENT_TYPE) \
_ET_(CONTENT_LENGTH) \
_ET_(HTTP_ACCEPT) \
_ET_(HTTP_USER_AGENT) \
_ET_(HTTP_REFERER)
static tNameMap nameValueMap[] = {
#define _ET_(n) { #n, NULL },
ENV_TABLE
#undef _ET_
{ NULL, NULL }
};
typedef enum {
#define _ET_(n) n ## _IDX,
ENV_TABLE
#undef _ET_
NAME_CT
} tNameIdx;
#define pzCgiMethod nameValueMap[ REQUEST_METHOD_IDX ].pzValue
#define pzCgiQuery nameValueMap[ QUERY_STRING_IDX ].pzValue
#define pzCgiLength nameValueMap[ CONTENT_LENGTH_IDX ].pzValue
/* = = = START-STATIC-FORWARD = = = */
static char*
parseInput(char* pzSrc, int len);
/* = = = END-STATIC-FORWARD = = = */
LOCAL void
loadCgi(void)
{
/*
* Redirect stderr to a file. If it gets used, we must trap it
* and emit the content-type: preamble before actually emitting it.
* First, tho, do a simple stderr->stdout redirection just in case
* we stumble before we're done with this.
*/
dup2(STDOUT_FILENO, STDERR_FILENO);
(void)fdopen(STDERR_FILENO, "w" FOPEN_BINARY_FLAG);
oops_pfx = CGI_ERR_MSG_FMT;
{
int tmpfd;
AGDUPSTR(cgi_stderr, CGI_TEMP_ERR_FILE_STR, "stderr file");
tmpfd = mkstemp(cgi_stderr);
if (tmpfd < 0)
AG_ABEND(aprf(MKSTEMP_FAIL_FMT, cgi_stderr));
dup2(tmpfd, STDERR_FILENO);
close(tmpfd);
}
/*
* Pull the CGI-relevant environment variables. Anything we don't find
* gets an empty string default.
*/
{
tNameMap* pNM = nameValueMap;
tNameIdx ix = (tNameIdx)0;
do {
pNM->pzValue = getenv(pNM->pzName);
if (pNM->pzValue == NULL)
pNM->pzValue = (char*)zNil;
} while (pNM++, ++ix < NAME_CT);
}
base_ctx = (scan_ctx_t*)AGALOC(sizeof(scan_ctx_t), "CGI ctx");
memset((void*)base_ctx, 0, sizeof(scan_ctx_t));
{
size_t textLen = strtoul(pzCgiLength, NULL, 0);
char* pzText;
if (strcasecmp(pzCgiMethod, "POST") == 0) {
if (textLen == 0)
AG_ABEND(LOAD_CGI_NO_DATA_MSG);
pzText = AGALOC(textLen + 1, "CGI POST");
if (fread(pzText, (size_t)1, textLen, stdin) != textLen)
AG_CANT(LOAD_CGI_READ_NAME, LOAD_CGI_READ_WHAT);
pzText[ textLen ] = NUL;
base_ctx->scx_data = parseInput(pzText, (int)textLen);
AGFREE(pzText);
} else if (strcasecmp(pzCgiMethod, LOAD_CGI_GET_NAME) == 0) {
if (textLen == 0)
textLen = strlen(pzCgiQuery);
base_ctx->scx_data = parseInput(pzCgiQuery, (int)textLen);
} else {
AG_ABEND(aprf(LOAD_CGI_INVAL_REQ_FMT, pzCgiMethod));
/* NOTREACHED */
#ifdef WARNING_WATCH
pzText = NULL;
#endif
}
}
base_ctx->scx_line = 1;
base_ctx->scx_fname = LOAD_CGI_DEFS_MARKER;
base_ctx->scx_scan = base_ctx->scx_data;
}
static char*
parseInput(char* pzSrc, int len)
{
# define defLen (sizeof("Autogen Definitions cgi;\n") - 1)
char* pzRes = AGALOC((len * 2) + defLen + 1, "CGI Definitions");
memcpy(pzRes, PARSE_INPUT_AG_DEF_STR, defLen);
(void)cgi_run_fsm(pzSrc, len, pzRes + defLen, len*2);
return AGREALOC(pzRes, strlen(pzRes)+1, "CGI input");
}
/*
* Local Variables:
* mode: C
* c-file-style: "stroustrup"
* indent-tabs-mode: nil
* End:
* end of agen5/agCgi.c */
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