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#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <microhttpd.h>
#define PORT 8888
#define POSTBUFFERSIZE 512
#define MAXNAMESIZE 20
#define MAXANSWERSIZE 512
#define GET 0
#define POST 1
struct connection_info_struct
{
int connectiontype;
char *answerstring;
struct MHD_PostProcessor *postprocessor;
};
const char *askpage = "<html><body>\
What's your name, Sir?<br>\
<form action=\"/namepost\" method=\"post\">\
<input name=\"name\" type=\"text\"\
<input type=\"submit\" value=\" Send \"></form>\
</body></html>";
const char *greetingpage =
"<html><body><h1>Welcome, %s!</center></h1></body></html>";
const char *errorpage =
"<html><body>This doesn't seem to be right.</body></html>";
static int
send_page (struct MHD_Connection *connection, const char *page)
{
int ret;
struct MHD_Response *response;
response =
MHD_create_response_from_buffer (strlen (page), (void *) page,
MHD_RESPMEM_PERSISTENT);
if (!response)
return MHD_NO;
ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
MHD_destroy_response (response);
return ret;
}
static int
iterate_post (void *coninfo_cls, enum MHD_ValueKind kind, const char *key,
const char *filename, const char *content_type,
const char *transfer_encoding, const char *data, uint64_t off,
size_t size)
{
struct connection_info_struct *con_info = coninfo_cls;
if (0 == strcmp (key, "name"))
{
if ((size > 0) && (size <= MAXNAMESIZE))
{
char *answerstring;
answerstring = malloc (MAXANSWERSIZE);
if (!answerstring)
return MHD_NO;
snprintf (answerstring, MAXANSWERSIZE, greetingpage, data);
con_info->answerstring = answerstring;
}
else
con_info->answerstring = NULL;
return MHD_NO;
}
return MHD_YES;
}
static void
request_completed (void *cls, struct MHD_Connection *connection,
void **con_cls, enum MHD_RequestTerminationCode toe)
{
struct connection_info_struct *con_info = *con_cls;
if (NULL == con_info)
return;
if (con_info->connectiontype == POST)
{
MHD_destroy_post_processor (con_info->postprocessor);
if (con_info->answerstring)
free (con_info->answerstring);
}
free (con_info);
*con_cls = NULL;
}
static int
answer_to_connection (void *cls, struct MHD_Connection *connection,
const char *url, const char *method,
const char *version, const char *upload_data,
size_t *upload_data_size, void **con_cls)
{
if (NULL == *con_cls)
{
struct connection_info_struct *con_info;
con_info = malloc (sizeof (struct connection_info_struct));
if (NULL == con_info)
return MHD_NO;
con_info->answerstring = NULL;
if (0 == strcmp (method, "POST"))
{
con_info->postprocessor =
MHD_create_post_processor (connection, POSTBUFFERSIZE,
iterate_post, (void *) con_info);
if (NULL == con_info->postprocessor)
{
free (con_info);
return MHD_NO;
}
con_info->connectiontype = POST;
}
else
con_info->connectiontype = GET;
*con_cls = (void *) con_info;
return MHD_YES;
}
if (0 == strcmp (method, "GET"))
{
return send_page (connection, askpage);
}
if (0 == strcmp (method, "POST"))
{
struct connection_info_struct *con_info = *con_cls;
if (*upload_data_size != 0)
{
MHD_post_process (con_info->postprocessor, upload_data,
*upload_data_size);
*upload_data_size = 0;
return MHD_YES;
}
else if (NULL != con_info->answerstring)
return send_page (connection, con_info->answerstring);
}
return send_page (connection, errorpage);
}
int
main ()
{
struct MHD_Daemon *daemon;
daemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY, PORT, NULL, NULL,
&answer_to_connection, NULL,
MHD_OPTION_NOTIFY_COMPLETED, request_completed,
NULL, MHD_OPTION_END);
if (NULL == daemon)
return 1;
getchar ();
MHD_stop_daemon (daemon);
return 0;
}
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