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>");
/* Main Configuration Structure */
static char *ngx_http_office_hours(ngx_conf_t * cf, ngx_command_t * cmd,
void *conf);
-/* Body Filter Storage */
+/* Filter Storage */
+static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
/* Utility Functions */
static ngx_flag_t within_office_hours(ngx_uint_t ** office_hours);
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);
/* Compiled Regex */
ngx_regex_compile_t rc;
};
+/*
+ * Main Header Filter
+ * If the current time is within office hours, it goes to the next
+ * handler. Otherwise it sets the headers to 403
+ */
+
+static ngx_int_t
+ngx_http_office_hours_header_filter(ngx_http_request_t * r)
+{
+
+ ngx_uint_t ** parsed_office_hours;
+ ngx_http_office_hours_conf_t *conf;
+
+ conf =
+ ngx_http_get_module_loc_conf(r,
+ ngx_http_office_hours_filter_module);
+
+
+ if (conf->office_hours == NULL) {
+ ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
+ "Office hours disabled");
+ return ngx_http_next_header_filter(r);
+ }
+
+ parsed_office_hours = parse_office_hours(conf->office_hours);
+
+ if (within_office_hours(parsed_office_hours)) {
+ ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
+ "Within office hours");
+ return ngx_http_next_header_filter(r);
+ }
+
+ ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
+ "Outside office hours");
+
+ r->headers_out.status = NGX_HTTP_FORBIDDEN;
+ r->headers_out.content_length_n = OUTPUT_HTML.len;
+
+ return ngx_http_next_header_filter(r);
+}
+
/*
* Main Body Filter
* If the current time is within office hours, it goes to the next
- * handler. Otherwise it returns 403 and the office hour listing.
+ * handler. Otherwise it replaces the body with the office hours.
*/
static ngx_int_t
-ngx_http_office_hours_body_filter(ngx_http_request_t * r, ngx_chain_t * in)
+ngx_http_office_hours_body_filter(ngx_http_request_t * r, ngx_chain_t *in)
{
+ ngx_buf_t *b;
ngx_uint_t ** parsed_office_hours;
+ ngx_chain_t out;
ngx_http_office_hours_conf_t *conf;
conf =
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0,
"Outside office hours");
- r->keepalive = 0;
- return NGX_HTTP_FORBIDDEN;
+ 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.");
+ return NGX_HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ out.buf = b;
+ out.next = NULL;
+
+ b->start = OUTPUT_HTML.data;
+ b->pos = b->start;
+ b->end = OUTPUT_HTML.data + OUTPUT_HTML.len;
+ b->last = b->end;
+
+ b->memory = 1;
+ b->last_buf = 1;
+
+ return ngx_http_next_body_filter(r, &out);
}
/*
return NGX_CONF_OK;
}
-/*
- * Postconfig Initialization Handler
- * Sets the request filter at the top of the chain
- */
-
-static ngx_int_t ngx_http_office_hours_init(ngx_conf_t * cf)
-{
-
- ngx_http_next_body_filter = ngx_http_top_body_filter;
- ngx_http_top_body_filter = ngx_http_office_hours_body_filter;
-
- rc.pattern = TIME_REGEX;
- rc.pool = cf->pool;
- if (ngx_regex_compile(&rc) != NGX_OK) {
- return NGX_ERROR;
- }
-
- return NGX_OK;
-}
-
/*
* Parse the office hour strings in the configuration file
* to fill out the hours array (in seconds)
if (n >= 0) {
/* Opening Hours */
- parsed_hours[0] = 60 * 60 * ngx_atoi(&office_hours.data[captures[2]], captures[3] - captures[2]);
- parsed_hours[0] = parsed_hours[0] + 60 * ngx_atoi(&office_hours.data[captures[4]], captures[5] - captures[4]);
+ parsed_hours[0] = 60 * 60 * parse_number(office_hours, captures[2], captures[3]);
+ parsed_hours[0] = parsed_hours[0] + 60 * parse_number(office_hours, captures[4], captures[5]);
- parsed_hours[1] = 60 * 60 * ngx_atoi(&office_hours.data[captures[6]], captures[7] - captures[6]);
- parsed_hours[1] = parsed_hours[1] + 60 * ngx_atoi(&office_hours.data[captures[8]], captures[9] - captures[8]);
+ parsed_hours[1] = 60 * 60 * parse_number(office_hours, captures[6], captures[7]);
+ parsed_hours[1] = parsed_hours[1] + 60 * parse_number(office_hours, captures[8], captures[9]);
return parsed_hours;
}
return time - (time / 86400) * 86400;
}
+
+/*
+ * 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)
+{
+
+ if (end - start == 0) {
+ return 0;
+ }
+
+ return ngx_atoi(&string.data[start], end - start);
+}
+
+/*
+ * Postconfig Initialization Handler
+ * Sets the request filter at the top of the chain
+ */
+
+static ngx_int_t ngx_http_office_hours_init(ngx_conf_t * cf)
+{
+
+ ngx_http_next_header_filter = ngx_http_top_header_filter;
+ ngx_http_top_header_filter = ngx_http_office_hours_header_filter;
+
+ ngx_http_next_body_filter = ngx_http_top_body_filter;
+ ngx_http_top_body_filter = ngx_http_office_hours_body_filter;
+
+ rc.pattern = TIME_REGEX;
+ rc.pool = cf->pool;
+ if (ngx_regex_compile(&rc) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
git.r.bdr.sh / rbdr / ngx_http_office_hours_filter_module / blobdiff