Tooltron

SRC=main.c tool.c query.c

HDR=tool.h query.h ../tooltron_mb.h

FLAGS=-O2 -g -Wall -I.. `pkg-config --cflags --libs libmodbus libcurl`

#include "query.h"

#include <stdio.h>

#include <curl/curl.h>

int query_init() {

  CURLcode error_code;

  error_code = curl_global_init(CURL_GLOBAL_NOTHING);

  if (error_code)

    fprintf(stderr, "curl_global_init: %s\n", curl_easy_strerror(error_code));

  return error_code;

}

void query_cleanup() {

  curl_global_cleanup();

}

static size_t write_data(void *buffer, size_t size, size_t nmemb, void *userp) {

  int *resultp = userp;

  return fwrite(buffer, size, nmemb, stdout);

}

int query_user_permission(int tool_id, int user_id) {

  CURL* handle;

  CURLcode error_code;

  char url[1024];

  int result = 0;

  handle = curl_easy_init();

  if (handle == NULL)

    return 0;

  sprintf(url, "http://roboclub.org/tooltron/%08x/%d/", user_id, tool_id);

  /* TODO temporary */ sprintf(url, "http://www.google.com");

  error_code = curl_easy_setopt(handle, CURLOPT_URL, url);

  if (error_code) goto error;

  error_code = curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_data);

  if (error_code) goto error;

  error_code = curl_easy_setopt(handle, CURLOPT_WRITEDATA, &result);

  if (error_code) goto error;

  error_code = curl_easy_perform(handle);

  if (error_code) goto error;

  curl_easy_cleanup(handle);

  return result;

error:

  fprintf(stderr, "curl: %s\n", curl_easy_strerror(error_code));

  fprintf(stderr, "     when authenticating user %08x on tool %d\n",

      user_id, tool_id);

  curl_easy_cleanup(handle);

  return 0;

}

#ifndef QUERY_H

#define QUERY_H

int query_init();

void query_cleanup();

int query_user_permission(int tool_id, int user_id);

#endif