server.c - shared from CS50 IDE

server.c

/**
 * Parses a request-line, storing its absolute-path at abs_path 
 * and its query string at query, both of which are assumed
 * to be at least of length LimitRequestLine + 1.
 */
bool parse(const char* line, char* abs_path, char* query)
{
    char message[strlen(line) + 1];
    strcpy(message, line);
	char* word;

	// getting the first word (method)
	word = strtok(message, " ");
	// making sure it's "GET"
    if (strcmp(word, "GET") != 0)
    {
        error(405);
        return false;
    }
    
	// getting the second word (request-target)
	word = strtok(NULL, " ");
	
	// copies it into abs_path
	strcpy(abs_path, word);
	
	// making sure it starts with '/'
    if (word[0] != '/')
    {
        error(501);
        return false;
    }
    // making sure it doesn't contain any '"'
    for (int i = 0; i < strlen(word); i++)
    {
        if (word[i] == '"')
        {
            error(400);
            return false;
        }
    }
	// getting the third word (HTTP version)
	word = strtok(NULL, " ");
	
	// making sure it's "HTTP/1.1"
	if (strcmp(word, "HTTP/1.1\r\n") != 0)
	{
	    error(505);
        return false; 
	}
	return true;
}