#include <sys/queue.h>
#include <string.h>
#include <stdlib.h>
#include <event2/event_struct.h>
#include "http.h"
#include "common.h"
int http_qarg_parse (struct evhttp_request *request, struct http_qarg *qarg_spec) {
// our return code
int error = -1;
// get the uri from the request
const char *uri = evhttp_request_get_uri(request);
// the keyval list that we get from evhttp_parse_query
struct evkeyval *qarg;
struct evkeyvalq qargs;
// parse the uri into a list
evhttp_parse_query(uri, &qargs);
// iterate over the list of given query arugments
TAILQ_FOREACH(qarg, &qargs, next) {
struct http_qarg *qarg_info;
// match them against our http_qarg structs
for (qarg_info = qarg_spec; qarg_info->hqa_type != QARG_END; qarg_info++) {
if (strcmp(qarg->key, qarg_info->hqa_key) == 0) {
// found a match
// extract a value from the qarg
char *cptr = NULL;
signed long int int_val;
switch (qarg_info->hqa_type) {
case QARG_UINT :
int_val = strtol(qarg->value, &cptr, 10);
if (*qarg->value == '\0' || *cptr != '\0' || int_val < 0)
ERROR("invalid QARG_UINT: %s: %s -> %ld", qarg->key, qarg->value, int_val);
*((unsigned long int *) qarg_info->hqa_addr) = (unsigned long int) int_val;
break;
case QARG_INVALID :
ERROR("QARG_INVALID: %s: %s", qarg->key, qarg->value);
default :
FATAL("invalid qarg_info->hqa_type: %d", qarg_info->hqa_type);
}
}
}
}
// success
error = 0;
error:
// clean up the qargs (badly named functions :< )
evhttp_clear_headers(&qargs);
return error;
}