const ngx_uint_t WEEK_LENGTH = 7;
const char * CLOSED_TOKEN = "closed";
const ngx_str_t TIME_REGEX = ngx_string("([0-9]{1,2})(?:\\:([0-9]{2}))?\\-([0-9]{1,2})(?:\\:([0-9]{2}))?");
-const ngx_str_t OUTPUT_HTML = ngx_string("<!doctype html><html><head><title>This website is currently closed!</title></head><body><h1>This website is currently closed!</h1><p>This website has closed for the day, please check our office hours below</p></body></html>");
+const ngx_str_t HEAD_HTML = ngx_string("<!doctype html><html><head><title>This website is currently closed!</title></head><body><h1>This website is currently closed!</h1><p>This website has closed for the day, please check our office hours below</p><ul>");
+const ngx_str_t MIDDLE_HTML = ngx_string("</ul><p><em>Current Server Time is: ");
+const ngx_str_t FOOT_HTML = ngx_string("</em></p></body></html>");
+const char * DAY_NAMES[7] = {
+ "Monday",
+ "Tuesday",
+ "Wednesday",
+ "Thursday",
+ "Friday",
+ "Saturday",
+ "Sunday"
+};
/* Main Configuration Structure */
static ngx_uint_t get_day_of_week(time_t time);
static ngx_uint_t get_seconds_of_day(time_t time);
static ngx_uint_t parse_number(ngx_str_t string, ngx_uint_t start, ngx_uint_t end);
+static ngx_str_t create_output_html(ngx_http_office_hours_conf_t * conf);
+static char * format_hours(ngx_uint_t * seconds, char * day);
+static char * format_seconds(ngx_uint_t seconds);
+static char * left_pad(unsigned int number);
-/* Compiled Regex */
+/* Globals */
ngx_regex_compile_t rc;
+ngx_str_t OUTPUT_HTML;
/*
* Module Definitions
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
"Outside office hours");
+ if (OUTPUT_HTML.data == NULL) {
+ OUTPUT_HTML = create_output_html(conf);
+ }
+
r->headers_out.status = NGX_HTTP_FORBIDDEN;
r->headers_out.content_length_n = OUTPUT_HTML.len;
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
"Outside office hours");
+ if (OUTPUT_HTML.data == NULL) {
+ OUTPUT_HTML = create_output_html(conf);
+ }
+
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to allocate response buffer.");
/*
* Calculate the day of the week given a timestamp
*/
+
static ngx_uint_t get_day_of_week(time_t time)
{
/*
* Calculate the number of seconds elapsed today
*/
+
static ngx_uint_t get_seconds_of_day(time_t time)
{
/*
* Parses a string, returns 0 if match was not found
*/
+
static ngx_uint_t parse_number(ngx_str_t string, ngx_uint_t start, ngx_uint_t end)
{
return ngx_atoi(&string.data[start], end - start);
}
+/*
+ * Given the current office hours configuration it creates the custom
+ * HTML
+ */
+
+static ngx_str_t create_output_html(ngx_http_office_hours_conf_t * conf)
+{
+
+ char * output_buffer;
+ time_t now;
+ ngx_str_t output_html;
+ ngx_uint_t i, seconds_of_day;
+ ngx_uint_t ** parsed_office_hours;
+
+
+ output_buffer = malloc(1024 * sizeof(char));
+ parsed_office_hours = parse_office_hours(conf->office_hours);
+ now = ngx_time();
+ seconds_of_day = get_seconds_of_day(now);
+
+ sprintf(output_buffer, "%s", (char *) HEAD_HTML.data);
+
+ for (i = 0; i < 7; ++i) {
+ sprintf(output_buffer + strlen(output_buffer), "%s", format_hours(parsed_office_hours[i], (char *) DAY_NAMES[i]));
+ }
+
+ sprintf(output_buffer + strlen(output_buffer), "%s", (char *) MIDDLE_HTML.data);
+ sprintf(output_buffer + strlen(output_buffer), "%s", format_seconds(seconds_of_day));
+ sprintf(output_buffer + strlen(output_buffer), "%s", (char *) FOOT_HTML.data);
+
+ output_html.data = (unsigned char *) output_buffer;
+ output_html.len = strlen(output_buffer);
+
+ return output_html;
+}
+
+/*
+ * Given a tuple of seconds and a day name, outputs an HTML
+ * string containing the formatted data as a list item
+ */
+
+static char * format_hours(ngx_uint_t * hours, char * day)
+{
+
+ char * output_html;
+
+ output_html = malloc(64 * sizeof(char));
+ if (hours[0] == hours[1]) {
+ sprintf(output_html, "<li><strong>%s</strong>: CLOSED</li>",
+ day
+ );
+ return output_html;
+ }
+
+ sprintf(output_html, "<li><strong>%s</strong>: %s - %s</li>",
+ day,
+ (char *) format_seconds(hours[0]),
+ (char *) format_seconds(hours[1])
+ );
+
+ return output_html;
+}
+
+/*
+ * Given seconds of the day, it returns a string showing
+ * HH:MM in 24 hour format
+ */
+
+static char * format_seconds(ngx_uint_t seconds)
+{
+
+ char * output_html;
+ unsigned int hours, minutes;
+
+ output_html = malloc(6 * sizeof(char));
+
+ hours = seconds / 60 / 60;
+ minutes = (seconds / 60) % 60;
+
+ sprintf(output_html, "%s:%s",
+ left_pad(hours),
+ left_pad(minutes)
+ );
+
+ return output_html;
+}
+
+/*
+ * Returns a number as a string adding 0 if < 10
+ */
+
+static char * left_pad(unsigned int number)
+{
+
+ char * output_string;
+ char * padding;
+
+ padding = "";
+ output_string = malloc(3 * sizeof(char));
+
+ if (number < 10) {
+ padding = "0";
+ }
+
+ sprintf(output_string, "%s%u", padding, number);
+
+ return output_string;
+}
+
/*
* Postconfig Initialization Handler
* Sets the request filter at the top of the chain
git.r.bdr.sh / rbdr / ngx_http_office_hours_filter_module / commitdiff