--- /dev/null
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased]
+
+## 1.0.0 - 2018-12-28
+### Added
+- This CHANGELOG
+- A README
+- A CONTRIBUTING guide
+- Formatting using astyle
+- Git hook to format code before commit
+- Makefile with tasks to format and install git hooks
+- A gitignore file
+- Parsing of directive time ranges in UTC only
+- Dynamically generate HTML based on hours directive
+
+[Unreleased]: https://gitlab.com/rbdr/ngx_office_hours/compare/master...develop
--- /dev/null
+# Contributing to ngx_http_office_hours_filter_module
+
+This NGINX module has the simple goal of allowing you to specify office
+hours for your server and not serving anything outside those hours.
+
+Any contributions are welcome especially if it works towards that goal.
+
+You can check the `README` for a list of **Further Improvements** if
+you want inspiration. Also, since I'm not great at C, any improvements
+to the code itself are also welcome!
+
+## The objective of ngx_http_office_hours_filter_module
+
+Give your web server the benefit of a regulated work schedule, and
+notify the consumers of the appropriate office hours to visit the
+website.
+
+Providing better ways to specify the working schedule of the server
+are in line with the objective.
+
+## How to contribute
+
+Above All: Be nice, always.
+
+* Always make sure the code is properly formatted with `make format`
+* Make the PRs according to [Git Flow][gitflow]: (features go to
+ develop, hotfixes go to master)
+
+[gitflow]: https://github.com/nvie/gitflow
--- /dev/null
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
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+ meet the following conditions:
+
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+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
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+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
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+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+ Copyright 2018 Rubén Beltrán del Río
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
--- /dev/null
+setup_hooks:
+ ln -s ../../scripts/git-hooks/pre-commit .git/hooks/pre-commit
+
+format:
+ astyle --lineend=linux --style=kr *.c
# Nginx Office Hours
-A victory for the server's labor rights: An nginx module that allows you to serve your content only during office hours.
\ No newline at end of file
+A victory for the server's labor rights: An nginx module that allows you to serve your content only during office hours.
+
+## Using the directive
+
+The `office_hours` directive expects a list of time ranges separated by
+spaces. The first range will be used as the default, and the rest will
+be read from right to left, ending with *sunday*
+
+### Example 1: Open 24 hours
+
+Don't use this directive.
+
+### Example 2: Open every day from 08:30 AM to 7:00 PM
+
+```
+office_hours 8:30-19;
+```
+
+Some things worth noting here: the format of time ranges uses 24 hour
+style, so no pesky AMs or PMs. Likewise, minutes are optional. Finally,
+note that since only one range was defined, this is applied to all days
+of the week. Another noteworthy
+
+### Example 3: Open every day from 08:30 AM to 7:00 PM, but closed sundays
+
+```
+office_hours 8:30-19 closed;
+```
+
+Two important things here: first notice that the closed keyword
+specifies that the server is closed on a specific day; second, notice
+how the last element is used for sunday, while the first one still
+applies to Monday-Saturday.
+
+### Example 4: Open weekdays from 08:30 AM to 7:00 PM, Saturdays 10:00 AM to 4:00 PM, closed on sundays
+
+```
+office_hours 8:30-19 10-16 closed;
+```
+
+Now hopefully you can see the pattern: The first time range applies to
+Monday-Friday, next one to Saturday and last one to Sunday.
+
+### Example 5: Open weekdays from 08:30 AM to 7:00 PM, closed on thursdays, reduced hours on weekends.
+
+```
+office_hours 8:30-19 closed 8:30-19 10-16 10-16;
+```
+
+Since we had to specify from Thursday, we have to explicitly set the
+values for Friday, Saturday and Sunday.
+
+### Example 6: Closed every day.
+
+Uninstall nginx.
+
+## What you will need to get started
+
+* [astyle][astyle]: Used to format the code
+* An `nginx` [source distribution][nginx] to compile the code.
+* A way to compile `nginx`. Check out [their guide][nginx-guide]!
+
+## Building the module
+
+You can build office hours as a dynamic module. From the `nginx` source
+directory run:
+
+```
+./configure --add-dynamic-module=/path/to/ngx_http_office_hours_filter_module
+make
+```
+
+For more information check the [nginx docs][nginx-module-docs]
+
+## Installing git hooks
+
+This repo contains a pre-commit git hook so indent will run before every
+commit. Run `make setup_hooks` to install it.
+
+## Further Improvements
+
+* Add support for timezones (currently only GMT)
+* Add support for public holidays
+* Add support to respect the time zone of the visitor and not just the
+ server
+* Add support for double shifts in the same day
+
+[astyle]: http://astyle.sourceforge.net
+[nginx]: https://nginx.org/en/download.html
+[nginx-guide]: https://docs.nginx.com/nginx/admin-guide/installing-nginx/installing-nginx-open-source/#sources
+[nginx-module-docs]: https://www.nginx.com/resources/wiki/extending/
--- /dev/null
+#
+# Copyright 2018 Rubén Beltrán del Río
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+
+ngx_addon_name=ngx_http_office_hours_filter_module
+
+if test -n "$ngx_module_link"; then
+ ngx_module_type=HTTP
+ ngx_module_name=ngx_http_office_hours_filter_module
+ ngx_module_srcs="$ngx_addon_dir/ngx_http_office_hours_filter_module.c"
+
+ . auto/module
+else
+ HTTP_MODULES="$HTTP_MODULES ngx_http_office_hours_filter_module"
+ NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_office_hours_filter_module.c"
+fi
--- /dev/null
+server {
+
+ listen 80;
+
+ root /var/www/blog;
+ index index.html index.htm;
+
+ server_name blog.unlimited.pizza;
+
+ office_hours 8:30-20 10-16 closed;
+
+ location / {
+ try_files $uri $uri/ =404;
+ }
+}
--- /dev/null
+/*
+ * Copyright 2018 Rubén Beltrán del Río
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+/*
+ * Declarations
+ */
+
+/* Constants */
+
+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 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 */
+
+typedef struct {
+ ngx_array_t *office_hours;
+} ngx_http_office_hours_conf_t;
+
+/* Lifecycle Functions For Module Context */
+
+static void *ngx_http_office_hours_create_conf(ngx_conf_t * cf);
+static char *ngx_http_office_hours_merge_conf(ngx_conf_t * cf,
+ void *parent, void *child);
+static ngx_int_t ngx_http_office_hours_init(ngx_conf_t * cf);
+
+/* Configuration Handler */
+
+static char *ngx_http_office_hours(ngx_conf_t * cf, ngx_command_t * cmd,
+ void *conf);
+
+/* 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_uint_t ** parse_office_hours(ngx_array_t * office_hours);
+static ngx_uint_t * parse_office_hours_string(ngx_str_t office_hours);
+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);
+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);
+
+/* Globals */
+ngx_regex_compile_t rc;
+ngx_str_t OUTPUT_HTML;
+
+/*
+ * Module Definitions
+ */
+
+/* Module Directives */
+
+static ngx_command_t ngx_http_office_hours_commands[] = {
+ {
+ ngx_string("office_hours"),
+ NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1 | NGX_CONF_TAKE2 | NGX_CONF_TAKE3 | NGX_CONF_TAKE4 | NGX_CONF_TAKE5 | NGX_CONF_TAKE6 | NGX_CONF_TAKE7,
+ ngx_http_office_hours,
+ NGX_HTTP_LOC_CONF_OFFSET,
+ offsetof(ngx_http_office_hours_conf_t, office_hours),
+ NULL
+ },
+
+ ngx_null_command
+};
+
+
+/* Module Context */
+
+static ngx_http_module_t ngx_http_office_hours_filter_module_ctx = {
+ NULL, /* Preconfiguration */
+ ngx_http_office_hours_init, /* Postconfiguration */
+
+ NULL, /* Create main configuration */
+ NULL, /* Initialize main configuration */
+
+ NULL, /* Create server configuration */
+ NULL, /* Merge server configuration */
+
+ ngx_http_office_hours_create_conf, /* Create location configuration */
+ ngx_http_office_hours_merge_conf /* Merge location configuration */
+};
+
+
+/* Module Definition */
+
+ngx_module_t ngx_http_office_hours_filter_module = {
+ NGX_MODULE_V1, //Module Version
+ &ngx_http_office_hours_filter_module_ctx, //Module context
+ ngx_http_office_hours_commands, //Module commands
+ NGX_HTTP_MODULE, //Module Type
+ NULL, //Initialize Master
+ NULL, //Initialize Module
+ NULL, //Initialize Process
+ NULL, //Initialize Thread
+ NULL, //Exit Thread
+ NULL, //Exit Process
+ NULL, //Exit Master
+ NGX_MODULE_V1_PADDING
+};
+
+
+/*
+ * 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");
+
+ 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;
+
+ 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 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_buf_t *b;
+ ngx_uint_t ** parsed_office_hours;
+ ngx_chain_t out;
+ 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_body_filter(r, in);
+ }
+
+ 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_body_filter(r, in);
+ }
+
+ 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.");
+ 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);
+}
+
+/*
+ * Callback for `office_hours ` directive
+ * Reads the configuration loaded from the config file(cf)
+ * And writes it to the right place in the module configuration(conf)
+ */
+
+static char *ngx_http_office_hours(ngx_conf_t * cf, ngx_command_t * cmd,
+ void *conf)
+{
+
+ char *conf_structure = conf;
+
+ ngx_str_t *hours, *value;
+ ngx_array_t **office_hours;
+ ngx_uint_t i;
+
+ /* Gets the array from the config structure using the defined
+ * offset, and if the pointer is unset it creates a new one.
+ * (The first element is the directive itself, so we should be
+ * offset by 1)
+ */
+ office_hours = (ngx_array_t **) (conf_structure + cmd->offset);
+
+ if (*office_hours == NGX_CONF_UNSET_PTR) {
+ *office_hours = ngx_array_create(cf->pool, cf->args->nelts - 1,
+ sizeof(ngx_str_t));
+
+ if (*office_hours == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ }
+ value = cf->args->elts;
+
+ for (i = 1; i < cf->args->nelts; ++i) {
+ hours = ngx_array_push(*office_hours);
+ if (hours == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ *hours = value[i];
+ }
+
+ return NGX_CONF_OK;
+}
+
+
+/*
+ * Config Creator
+ * Initializes the configuration structure
+ */
+
+static void *ngx_http_office_hours_create_conf(ngx_conf_t * cf)
+{
+
+ ngx_http_office_hours_conf_t *conf;
+
+ conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_office_hours_conf_t));
+
+ if (conf == NULL) {
+ return NULL;
+ }
+ conf->office_hours = NGX_CONF_UNSET_PTR;
+
+ return conf;
+}
+
+/*
+ * Merge Config Values
+ * Sets the defaults for the configuration and merges
+ * with other configurations
+ */
+
+static char *ngx_http_office_hours_merge_conf(ngx_conf_t * cf,
+ void *parent, void *child)
+{
+
+ ngx_http_office_hours_conf_t *prev = parent;
+ ngx_http_office_hours_conf_t *conf = child;
+
+ ngx_conf_merge_ptr_value(conf->office_hours, prev->office_hours, NULL);
+
+ return NGX_CONF_OK;
+}
+
+/*
+ * Parse the office hour strings in the configuration file
+ * to fill out the hours array (in seconds)
+ */
+
+static ngx_uint_t ** parse_office_hours(ngx_array_t * office_hours)
+{
+
+ ngx_str_t *hours;
+ ngx_uint_t ** parsed_office_hours;
+ ngx_uint_t i, j;
+
+ parsed_office_hours = malloc(7 * sizeof(ngx_uint_t *));
+
+ hours = office_hours->elts;
+
+ /*
+ * On the configuration file, the leftmost element
+ * always applies to all remaining days, all others
+ * are read from right to left. So first we will apply
+ * the initial override, and then iterate based on the
+ * number of overrides
+ */
+
+ for (i = 0; i < WEEK_LENGTH + 1 - office_hours->nelts; ++i) {
+ parsed_office_hours[i] = parse_office_hours_string(hours[0]);
+ }
+
+ for (i = 1; i < office_hours->nelts; ++i) {
+ j = WEEK_LENGTH - office_hours->nelts + i;
+ parsed_office_hours[j] = parse_office_hours_string(hours[i]);
+ }
+
+ return parsed_office_hours;
+}
+
+/*
+ * Given a time string or the closed token, return a tuple
+ * of numbers representing opening and closing hours
+ */
+
+static ngx_uint_t * parse_office_hours_string(ngx_str_t office_hours)
+{
+
+ int captures[(1 + 4) * 3];
+ ngx_int_t n;
+ ngx_uint_t * parsed_hours;
+
+ parsed_hours = malloc(2 * sizeof(ngx_uint_t));
+
+ if(ngx_strcmp(office_hours.data, CLOSED_TOKEN) == 0) {
+ parsed_hours[0] = 0;
+ parsed_hours[1] = 0;
+ return parsed_hours;
+ }
+
+ n = ngx_regex_exec(rc.regex, &office_hours, captures, (1 + 4) * 3);
+
+ if (n >= 0) {
+ /* Opening Hours */
+
+ 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 * 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;
+ }
+
+ /* Non-matching strings count as open */
+
+ parsed_hours[0] = 0;
+ parsed_hours[1] = 86400;
+ return parsed_hours;
+}
+
+/*
+ * Given an office hours array, it returns whether or not
+ * it is currently within office hours.
+ */
+
+static ngx_flag_t within_office_hours(ngx_uint_t ** office_hours)
+{
+
+ time_t now;
+ ngx_uint_t day_of_week, seconds_of_day;
+ ngx_uint_t * current_hours;
+
+ ngx_time_update();
+ now = ngx_time();
+ day_of_week = get_day_of_week(now);
+ seconds_of_day = get_seconds_of_day(now);
+ current_hours = office_hours[day_of_week];
+
+ return seconds_of_day >= current_hours[0] && seconds_of_day <= current_hours[1];
+}
+
+/*
+ * Calculate the day of the week given a timestamp
+ */
+
+static ngx_uint_t get_day_of_week(time_t time)
+{
+
+ /* Epoch was thursday, so add 3 so we start on monday */
+ return (time / 86400 + 3) % 7;
+}
+
+/*
+ * Calculate the number of seconds elapsed today
+ */
+
+static ngx_uint_t get_seconds_of_day(time_t time)
+{
+
+ 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);
+}
+
+/*
+ * 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
+ */
+
+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;
+}
--- /dev/null
+#!/usr/bin/env sh
+
+SOURCES=$(git diff --cached --name-only --diff-filter=ACMR | grep -E "\.c$")
+
+set -e
+make format
+
+for SOURCE in ${SOURCES}; do
+ git add ${SOURCE}
+done
git.r.bdr.sh / rbdr / ngx_http_office_hours_filter_module / commitdiff