Hello,
is it mandatory to create MHD_create_post_processor during the first
call of function MHD_AccessHandlerCallback? In all post examples, it
is done in if (NULL == *con_cls){ ... }.
Or can I create it later (second call of MHD_AccessHandlerCallback)?:
if (0 == strcmp (method, "POST"))
{
if(false == was_not_alredy_created)
{
con_info->postprocessor = MHD_create_post_processor
(connection, POSTBUFFERSIZE, iterate_post, (void *) con_info);
}
if (0 != *upload_data_size)
{
MHD_post_process (con_info->postprocessor, upload_data,
*upload_data_size);
*upload_data_size = 0;
return MHD_YES;
}
}
Thanks You for answer(s)
Martin
-------------------------------- A very very long reason
--------------------------
I am trying to create a small web server based on libmicrohttpd
handling also SSI and CGI requests (a function which returns buffer).
It offers own interface e.g. only http_server_start(). Internals of
Libmicrohttpd are mostly hidden, e.g. the function
http_server_set_credentials(const char * username, const char *
password) sets user and password for basic http auth and
http_server_setup_handler() sets user callback for handling requests.
My AccessHandlerCallback is a static function and call user's callback.
#define HTTP_NEW_CONNECTION ((void *)(~0))
static int AccessHandlerCallback(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) {
int ret = MHD_NO;
char *user = NULL;
char *pass = NULL;
if (NULL == *con_cls)
{
/*
* Thus, we will generate no response until the parameter is
non-null—implying the callback was called before at least once.
* We do not need to share information between different calls
of
the callback, so we can set the parameter to any adress
* that is assured to be not null.
*/
*con_cls = HTTP_NEW_CONNECTION;
return MHD_YES;
}
// get username and password
user = MHD_basic_auth_get_username_password (connection,&pass);
// check if it is valid
if (false == check_credentials(user, pass))
{
// no, send denied reply
struct MHD_Response * response =
MHD_create_response_from_buffer(strlen(AUTH_FAIL_PAGE), (void *)
AUTH_FAIL_PAGE, MHD_RESPMEM_PERSISTENT);
MHD_add_response_header (response, MHD_HTTP_HEADER_CONTENT_TYPE,
"text/html""; charset=iso-8859-2");
// Set headers to always close connection
MHD_add_response_header (response,MHD_HTTP_HEADER_CONNECTION,
"close");
ret = MHD_queue_basic_auth_fail_response(connection,
AUTHENTICATION_REALM_MESSAGE, response);
MHD_destroy_response (response);
}
else
{
if(NULL != url_handler.url_callback)
{
ret = url_handler.url_callback(connection,
url_handler.url_callback_cls, url, method, upload_data,
upload_data_size, con_cls);
}
else
{
ret = MHD_NO;
}
}
// Dealocate because of MHD.
free (user);
free (pass);
return ret;
}
I would like to handle more than one page (1 ... n files) e.g. from
this GET request.
"<html><body>Upload a file, please!<br>
<form action=\"/filepost1\" method=\"post\"
enctype=\"multipart/form-data\">
<input name=\"file\" type=\"file\">
<input type=\"submit\" value=\" Send \"></form>
<form action=\"/filepost2\" method=\"post\"
enctype=\"multipart/form-data\">
<input name=\"file\" type=\"file\">
<input type=\"submit\" value=\" Send \"></form>
</body></html>";
Both files /filepost1 and /filepost2 have different
MHD_PostDataIterator, filepost1 stores file onto harddisk, filepost2
to memory.
Which MHD_PostDataIterator will be used, it is defined in a user
callback called from AccessHandlerCallback. This is the reason of my
question.