Jansson lib parser - c

Question

I'm developing an application written in C to communicate with an API web server using libcurl. I parsed successfully some JSON responses but I failed to parse this one (the simplest one).
- Code
void auth_parser(char* serverResponse,struct ParsedAuthResponse *responseP)
{
char* json_text;
json_t *root;
json_error_t error;
const char* error_text=NULL;
const char* message_text=NULL;
json_text=malloc(strlen(serverResponse)+strlen("[]")+1);
if (!json_text)
{
printf( "not enough memory\n");
return ;
}
strcpy(json_text,"[");
json_text=strcat(json_text,serverResponse);
json_text=strcat(json_text,"]");
root = json_loads(json_text, 0, &error);
SCM_FREE(json_text);
if(!json_is_array(root))
{
printf( "error: on line %d: %s\n", error.line, error.text);
return;
}
json_t *error_obj,*message_obj;
data = json_array_get(root, 0);
if(!json_is_object(data))
{
printf("error1 \n");
json_decref(root);
}
else
{
printf("OK1 \n");
}
error_obj= json_object_get(data, "error");
if(error_obj)
{
if(!json_is_string(error_obj))
{
printf( "error2 \n");
json_decref(root);
}
else
{
error_text=json_string_value(error_obj);
printf("error_text=%s",error_text);
}
message_obj=json_object_get(data, "message");
if(!json_is_string(message_obj))
{
printf( "error3 \n");
json_decref(root);
}
else
{
message_text=json_string_value(message_obj);
printf("message_text=%s",message_text);
printf("OK3 \n");
}
}
return;
}
This is the JSON object to parse :
{"error":4,"message":"Authentication Failed - You do not have
permissions to access the service"}
It fails at error2

Answer 1

You are checking if the value of the error key is a string and it is failing because it is an integer.
Try replacing :
if(!json_is_string(error_obj))
with
if(!json_is_integer(error_obj))