//Find a specific arg in a string of get- or post-data.
//Line is the string of post/get-data, arg is the name of the value to find. The
//zero-terminated result is written in buff, with at most buffLen bytes used. The
//function returns the length of the result, or -1 if the value wasn't found.
int ICACHE_FLASH_ATTR httpdFindArg(char *line, char *arg, char *buff, int buffLen) {
char *p, *e;
if (line==NULL) return 0;
p=line;
while(p!=NULL && *p!='\n' && *p!='\r' && *p!=0) {
os_printf("findArg: %s\n", p);
if (os_strncmp(p, arg, os_strlen(arg))==0 && p[strlen(arg)]=='=') {
p+=os_strlen(arg)+1; //move p to start of value
e=(char*)os_strstr(p, "&");
if (e==NULL) e=p+os_strlen(p);
os_printf("findArg: val %s len %d\n", p, (e-p));
return httpdUrlDecode(p, (e-p), buff, buffLen);
}
p=(char*)os_strstr(p, "&");
if (p!=NULL) p+=1;
}
os_printf("Finding %s in %s: Not found :/\n", arg, line);
return -1; //not found
}
/* httpdFindArg */
int ICACHE_FLASH_ATTR httpdFindArg(char * pszLine,
char * pszArgument,
char * pszBuffer,
int cbBufferLength)
{
/* initialization */
int iRet = -1;
char * pbBeginningOfArg = NULL;
char * pbEndOfArg = NULL;
if (NULL == pszLine)
{
iRet = 0;
goto lblCleanup;
}
pbBeginningOfArg = pszLine;
while ((NULL_STRING != pbBeginningOfArg) &&
((*NEWLINE_SYMBOL_STRING) != *pbBeginningOfArg) &&
((*NEWLINE_R_SYMBOL_STRING) != *pbBeginningOfArg) &&
(NULL_STRING != *pbBeginningOfArg))
{
#ifdef HTTPD_DEBUG
os_printf("httpdFindArg: %s\n", pbBeginningOfArg);
#endif
if ((0 == os_strncmp(pbBeginningOfArg, pszArgument, os_strlen(pszArgument))) && ((*EQUAL_SYMBOL_STRING) == pbBeginningOfArg[strlen(pszArgument)]))
{
pbBeginningOfArg += os_strlen(pszArgument) + 1; //move pbBeginningOfArg to start of value
pbEndOfArg = (char *)os_strstr(pbBeginningOfArg, AMPERSAND_SYMBOL_STRING);
if (NULL == pbEndOfArg)
{
pbEndOfArg = pbBeginningOfArg + os_strlen(pbBeginningOfArg);
}
#ifdef HTTPD_DEBUG
os_printf("httpdFindArg: value: %s length: %d\n", pbBeginningOfArg, (pbEndOfArg - pbBeginningOfArg));
#endif
iRet = httpdUrlDecode(pbBeginningOfArg, (pbEndOfArg - pbBeginningOfArg), pszBuffer, cbBufferLength);
goto lblCleanup;
}
pbBeginningOfArg = (char *)os_strstr(pbBeginningOfArg, AMPERSAND_SYMBOL_STRING);
if (NULL != pbBeginningOfArg)
{
pbBeginningOfArg += 1;
}
}
/* not found */
#ifdef HTTPD_DEBUG
os_printf("httpdFindArg: didn't find %s in %s\n", pszArgument, pszLine);
#endif
lblCleanup:
return iRet;
}