Dear Colleagues,
Does anybody have and example of of form submitting functionality using GET request working on LwIP on top of Halcogen Ethernet&LwIP demo?
In httpd.h I have modified the handler definition from:
typedef char *(*tCGIHandler)(char *pcValue);
to
typedef char *(*tCGIHandler)(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
I have populated the handler array:
static tCGI const cgi_handlers[] = { { "/index.html", &cgi_display }, };
with a primitive handler:
static char *cgi_display(int index, int numParams, char *param[], char *value[]) {
int i;
for (i = 0; i < numParams; ++i) {
if (strstr(param[i], "text") != (char *)0) /* param text found? */
return "/thank_you.htm";
}
return (char *)0;
}
in lwip_main I register the handler right after httpd_init
http_set_cgi_handlers(cgi_handlers,1); //hardcoded 1 just for test
However I have doubts as to where the call has to take place. My understanding is that it should be in http_parse_request of httpd_io.c, so I wrote the following inside the parsing loop:
if(params) {
*params = '\0';
params++;
filename = g_pCGIs[i].pfnCGIHandler(i,1,¶ms,&data);
break;
}
However nothing works, /index.html?text=testrequest&submit=Submit produces nothing but "No data received" in chrome.
The index.html has the following:
<form name="CGI Example" method="GET" action="index.html">
<table summary="cgi example" width="100px" cellspacing=4 cellpadding=1 align="center" valign="middle">
<tr align="left">
<td colspan="2" bgcolor="#ffff66" align="center"><b>CGI Example</b>
</td>
</tr>
<tr bgcolor="#e0e0e0" align="left">
<td width="100px"> Screen text:
</td>
<td>
<input type="text" name="text" size="10" maxlength="10">
<input type="submit" name="submit" value="Submit" ><br>
</td>
</tr>
</table>
</form>
Any ideas or working examples?
Anyone tried lwip 1.4.x instead of 1.3.2
Regards,
Kirill
