vanessaaleung

  /* curl_easy_setopt(handle, option, parameter): tells libcurl how to behave 
  
  /* specify URL to get */ 
  curl_easy_setopt(curl_handle, CURLOPT_URL, "https://accounts.google.com/o/oauth2/device/code");
  
  char data[255];
  strcat(data, "client_id=");
  strcat(data, client_id);
  strcat(data, "&scopescope=https://www.googleapis.com/auth/drive.file");
  

vanessaaleung

int main(void)
{
  CURL *curl_handle;
  CURLcode res;
 
  struct MemoryStruct chunk;
 
  chunk.memory = malloc(1);  /* will be grown as needed by the realloc above */ 
  chunk.size = 0;    /* no data at this point */ 
 

vanessaaleung

char * client_id = "YOUR_CLIENT_ID";
char * client_secret = "YOUR_CLIENT_SECRET";

vanessaaleung

{
  "device_code" : "4/4-GMMhmHCXhWEzkobqIHGG_EnNYYsAkukHspeYUk9E8",
  "user_code" : "GQVQ-JKEC",
  "expires_in" : 1800,
  "interval" : 5,
  "verification_url" : "https://www.google.com/device"
}
      

vanessaaleung

char user_code[255];
char device_code[255];

/* check for errors */ 
  if(res != CURLE_OK) {
    fprintf(stderr, "curl_easy_perform() failed: %s\n",  /* stderr: default destination for error messages */
            curl_easy_strerror(res));  /* returns a string describing the error code */
  }
  else {
    /* Now, our chunk.memory points to a memory block that is chunk.size

vanessaaleung

printf("Enter below code on 'https://www.google.com/device' :\n");
printf("%s\n", user_code);

/* Instruct user to press `Enter` when finish verification process */
printf("Press enter when finish\n");

/* When detect a new line, continue */
while(getchar()!= '\n');

vanessaaleung

chunk.memory = malloc(1);
chunk.size = 0;

curl_easy_setopt(curl_handle, CURLOPT_URL, "https://www.googleapis.com/oauth2/v4/token");

char url[300];
strcat(url, "client_id=");
strcat(url, client_id);
strcat(url, "&client_secret=");
strcat(url, client_secret);

vanessaaleung

{
  "access_token":"1/fFAGRNJru1FTz70BzhT3Zg",
  "expires_in":3920,
  "token_type":"Bearer",
  "refresh_token":"1/xEoDL4iW3cxlI7yDbSRFYNG01kVKM2C-259HOF2aQbI"
}

vanessaaleung

char access_token[255];

vanessaaleung

char access_token[255];

if(res != CURLE_OK){
  fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
else{
  char *expiresin_result2 = strstr(chunk.memory, "\"expires_in");
  int expiresin_position2 = (int)(expiresin_result2 - chunk.memory);
  
  char *accesstoken_result = strstr(chunk.memory, "\"access_token");