Nginx

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### Initialize project and install browserify

Source: https://nginx.org/en/docs/njs/node_modules.html

Sets up an empty project directory with a initial package.json and installs browserify for bundling Node.js dependencies.

```shell
$ mkdir my_project && cd my_project
$ npx license choose_your_license_here > LICENSE
$ npx gitignore node

$ cat > package.json <<EOF
{
  "name":        "foobar",
  "version":     "0.0.1",
  "description": "",
  "main":        "index.js",
  "keywords":    [],
  "author":      "somename <some.email@example.com> (https://example.com)",
  "license":     "some_license_here",
  "private":     true,
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  }
}
EOF
$ npm init -y
$ npm install browserify

```

--------------------------------

### Configure nginx build parameters with ./configure

Source: https://nginx.org/en/docs/configure.html

Example invocation of the configure script with custom paths, SSL support, and third-party library locations. All parameters must be entered on a single line. Following configuration, compile and install nginx using make.

```sh
./configure
    --sbin-path=/usr/local/nginx/nginx
    --conf-path=/usr/local/nginx/nginx.conf
    --pid-path=/usr/local/nginx/nginx.pid
    --with-http_ssl_module
    --with-pcre=../pcre2-10.39
    --with-zlib=../zlib-1.3

```

--------------------------------

### Install protobufjs and generate static module with pbjs

Source: https://nginx.org/en/docs/njs/node_modules.html

Installs protobufjs and compiles helloworld.proto into static JavaScript code. Static mode is used because njs does not support dynamic function generation.

```shell
$ npm install protobufjs
$ npx pbjs -t static-module helloworld.proto > static.js

```

--------------------------------

### Configure multi-level fastcgi_temp_path hierarchy and path example

Source: https://nginx.org/en/docs/http/ngx_http_fastcgi_module.html

Defines a directory with a multi-level subdirectory hierarchy underneath the specified directory along with an example resulting file path.

```nginx
fastcgi_temp_path /spool/nginx/fastcgi_temp 1 2;

```

```text
/spool/nginx/fastcgi_temp/7/45/00000123457

```

--------------------------------

### Example format for auth_basic_user_file

Source: https://nginx.org/en/docs/http/ngx_http_auth_basic_module.html

Demonstrates the syntax for user credentials, comments, and entries in an auth_basic_user_file.

```plaintext
# comment
name1:password1
name2:password2:comment
name3:password3
```

--------------------------------

### Install required npm packages

Source: https://nginx.org/en/docs/njs/node_modules.html

Install Babel, Webpack, and the target libraries (buffer and dns-packet) needed for transpiling and packaging code for njs.

```shell
$ npm install @babel/core @babel/cli @babel/preset-env babel-loader
$ npm install webpack webpack-cli
$ npm install buffer
$ npm install dns-packet

```

--------------------------------

### Switch to nginx-debug service on Linux

Source: https://nginx.org/en/docs/debugging_log.html

Stops the standard NGINX service and starts the pre-built `nginx-debug` binary provided by Linux packages.

```shell
service nginx stop
service nginx-debug start

```

--------------------------------

### Example HLS playlist and fragment request URIs

Source: https://nginx.org/en/docs/http/ngx_http_hls_module.html

Illustrates valid HLS playlist (.m3u8) and fragment (.ts) request URIs with time offset, start, end, and fragment length query arguments.

```http
http://hls.example.com/test.mp4.m3u8?offset=1.000&start=1.000&end=2.200
http://hls.example.com/test.mp4.m3u8?len=8.000
http://hls.example.com/test.mp4.ts?start=1.000&end=2.200
```

--------------------------------

### Configure NGINX with QuickJS engine support

Source: https://nginx.org/en/docs/njs/install.html

Passes the include and library paths for QuickJS to ./configure via --with-cc-opt and --with-ld-opt parameters.

```shell
./configure --add-module=_path-to-njs_/nginx \
    --with-cc-opt="-I _path-to-quickjs_" \
    --with-ld-opt="-L _path-to-quickjs_"

```

--------------------------------

### Define entry point in load.js

Source: https://nginx.org/en/docs/njs/node_modules.html

Exposes `dns-packet` and `buffer` to the global namespace for bundling.

```javascript
global.dns = require('dns-packet')
global.Buffer = require('buffer/').Buffer

```

--------------------------------

### buf.slice([start[, end]])

Source: https://nginx.org/en/docs/njs/reference.html

Returns a new buffer slice referencing the same memory, cropped by the start and end indices.

```APIDOC
### Method Signature
`buf.slice([start[, end]])`

### Description
Returns a new `buf` that references the same memory as the original, but offset and cropped by the `start` and `end` values. Not compatible with `Uint8Array.prototype.slice()`. To copy the slice, use `Uint8Array.prototype.slice()`.

### Parameters
- **start** (number, optional) - Index where the slice starts.
- **end** (number, optional) - Index where the slice ends.
```

--------------------------------

### buf.subarray([start[, end]])

Source: https://nginx.org/en/docs/njs/reference.html

Returns a new buffer referencing the same memory as the original, offset and cropped by start and end indices.

```APIDOC
### Method Signature
`buf.subarray([start[, end]])`

### Description
Returns a new `buf` that references the same memory as the original, but offset and cropped by `start` and `end`. If `end` is greater than `buf.length`, the result is the same as if `end` equaled `buf.length`.

### Parameters
- **start** (number, optional) - Index where the subarray starts.
- **end** (number, optional) - Index where the subarray ends.
```

--------------------------------

### Implement an NGINX Core Module in ngx_foo_module

Source: https://nginx.org/en/docs/dev/development_guide.html

Demonstrates an example core module implementation containing configuration allocation, default value initialization, directive definition, and post-handler logic.

```c
/*
 * Copyright (C) Author.
 */


#include <ngx_config.h>
#include <ngx_core.h>


typedef struct {
    ngx_flag_t  enable;
} ngx_foo_conf_t;


static void *ngx_foo_create_conf(ngx_cycle_t *cycle);
static char *ngx_foo_init_conf(ngx_cycle_t *cycle, void *conf);

static char *ngx_foo_enable(ngx_conf_t *cf, void *post, void *data);
static ngx_conf_post_t  ngx_foo_enable_post = { ngx_foo_enable };


static ngx_command_t  ngx_foo_commands[] = {

    { ngx_string("foo_enabled"),
      NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      0,
      offsetof(ngx_foo_conf_t, enable),
      &ngx_foo_enable_post },

      ngx_null_command
};


static ngx_core_module_t  ngx_foo_module_ctx = {
    ngx_string("foo"),
    ngx_foo_create_conf,
    ngx_foo_init_conf
};


gx_module_t  ngx_foo_module = {
    NGX_MODULE_V1,
    &ngx_foo_module_ctx,                   /* module context */
    ngx_foo_commands,                      /* module directives */
    NGX_CORE_MODULE,                       /* module type */
    NULL,                                  /* init master */
    NULL,                                  /* init module */
    NULL,                                  /* init process */
    NULL,                                  /* init thread */
    NULL,                                  /* exit thread */
    NULL,                                  /* exit process */
    NULL,                                  /* exit master */
    NGX_MODULE_V1_PADDING
};


static void *
gx_foo_create_conf(ngx_cycle_t *cycle)
{
    ngx_foo_conf_t  *fcf;

    fcf = ngx_pcalloc(cycle->pool, sizeof(ngx_foo_conf_t));
    if (fcf == NULL) {
        return NULL;
    }

    fcf->enable = NGX_CONF_UNSET;

    return fcf;
}


static char *
gx_foo_init_conf(ngx_cycle_t *cycle, void *conf)
{
    ngx_foo_conf_t *fcf = conf;

    ngx_conf_init_value(fcf->enable, 0);

    return NGX_CONF_OK;
}


static char *
gx_foo_enable(ngx_conf_t *cf, void *post, void *data)
{
    ngx_flag_t  *fp = data;

    if (*fp == 0) {
        return NGX_CONF_OK;
    }

    ngx_log_error(NGX_LOG_NOTICE, cf->log, 0, "Foo Module is enabled");

    return NGX_CONF_OK;
}
```

--------------------------------

### Installing TypeScript globally with npm

Source: https://nginx.org/en/docs/njs/typescript.html

Install the TypeScript compiler globally using npm prior to compiling TypeScript files.

```shell
# npm install -g typescript

```

--------------------------------

### Create initial library bundle using Browserify

Source: https://nginx.org/en/docs/njs/node_modules.html

Bundles `load.js` and dependencies into a single `bundle.js` file before transpilation.

```shell
$ npx browserify load.js -o bundle.js -d

```

--------------------------------

### Unpack and start nginx on Windows

Source: https://nginx.org/en/docs/windows.html

Unpacks the downloaded nginx distribution in the drive C: root directory and launches the nginx background process.

```cmd
cd c:\
unzip nginx-1.31.6.zip
cd nginx-1.31.6
start nginx

```

--------------------------------

### GET /connections

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Retrieves statistics on client connections.

```APIDOC
## GET /connections

### Description
Returns statistics of client connections.

### Method
GET

### Endpoint
/connections

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of the connections statistics will be output.

### Response
#### Success Response (200)
- Returns Connections object.

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Create build directories and unpack third-party libraries

Source: https://nginx.org/en/docs/howto_build_on_win32.html

Creates the `objs/lib` directory structure and extracts the source tarballs for PCRE, zlib, and OpenSSL.

```shell
mkdir objs
mkdir objs/lib
cd objs/lib
tar -xzf ../../pcre2-10.39.tar.gz
tar -xzf ../../zlib-1.3.1.tar.gz
tar -xzf ../../openssl-3.0.14.tar.gz

```

--------------------------------

### GET /stream/zone_sync/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns the cluster synchronization status for a node.

```APIDOC
## GET /stream/zone_sync/

### Description
Returns synchronization status of a cluster node.

### Method
GET

### Endpoint
`/stream/zone_sync/`

### Response
#### Success Response (200)
- Returns Stream Zone Sync Node

#### Error Response (404)
- Unknown version (`UnknownVersion`)
```

--------------------------------

### buffer[index]

Source: https://nginx.org/en/docs/njs/reference.html

Gets or sets the octet at the specified index in the Buffer.

```APIDOC
### buffer[index]

#### Description
The index operator that can be used to get and set the octet at position `index` in `buffer`. The values refer to individual bytes, so the legal value range is between 0 and 255 (decimal).

#### Parameters
- **index** (integer) - Required - The zero-based index of the byte to access or modify.

#### Returns
- (number) - The byte value (0–255) at the given index.
```

--------------------------------

### Enable basic asynchronous file I/O

Source: https://nginx.org/en/docs/http/ngx_http_core_module.html

Enables AIO on FreeBSD and Linux with custom output buffer allocation.

```nginx
location /video/ {
    aio            on;
    output_buffers 1 64k;
}

```

--------------------------------

### Configure request rate limiting example

Source: https://nginx.org/en/docs/http/ngx_http_limit_req_module.html

Demonstrates setting up a shared memory zone with limit_req_zone and applying a rate limit with a burst size in a location block.

```nginx
http {
    limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s;

    ...

    server {

        ...

        location /search/ {
            limit_req zone=one burst=5;
        }

```

--------------------------------

### GET /resolvers/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information and statistics for all resolver zones.

```APIDOC
## GET /resolvers/

### Description
Returns status information for each resolver zone.

### Method
GET

### Endpoint
`/resolvers/`

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of resolvers statistics will be output.

### Response
#### Success Response (200)
- Returns a collection of "Resolver Zone" objects for all resolvers

#### Error Response (404)
- Unknown version (`UnknownVersion`)
```

--------------------------------

### GET /stream/limit_conns/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for all stream limit_conn zones.

```APIDOC
## GET /stream/limit_conns/

### Description
Returns status information for each stream limit_conn zone.

### Method
GET

### Endpoint
`/stream/limit_conns/`
```

--------------------------------

### Configure basic stream logging with log_format and access_log

Source: https://nginx.org/en/docs/stream/ngx_stream_log_module.html

Sets up a custom log format named 'basic' and writes session logs to a file using a 32k buffer.

```nginx
log_format basic '$remote_addr [$time_local] '
                 '$protocol $status $bytes_sent $bytes_received '
                 '$session_time';

access_log /spool/logs/nginx-access.log basic buffer=32k;

```

--------------------------------

### mkdirSync(path[, options])

Source: https://nginx.org/en/docs/njs/reference.html

Synchronously creates a directory at the specified path.

```APIDOC
## mkdirSync(path[, options])

### Description
Synchronously creates a directory at the specified `path` (0.4.2).

### Parameters
- **path** (string) - Path of the directory to create
- **options** (integer | Object) - Optional mode integer or an options object
  - **mode** (number) - Mode option, by default is `0o777`

### Returns
`undefined`
```

--------------------------------

### GET /stream/server_zones/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for each stream server zone.

```APIDOC
## GET /stream/server_zones/

### Description
Returns status information for each stream server zone.

### Method
GET

### Endpoint
`/stream/server_zones/`

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of server zones will be output. If the `fields` value is empty, then only server zone names will be output.

### Response
#### Success Response (200)
- **Response Body** (collection) - A collection of "Stream Server Zone" objects for all stream server zones

#### Error Responses
- **404 Not Found** - Unknown version (`UnknownVersion`)
```

--------------------------------

### GET /stream/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns a list of first level stream endpoints.

```APIDOC
## GET /stream/

### Description
Returns a list of first level stream endpoints.

### Method
GET

### Endpoint
`/stream/`

### Response
#### Success Response (200)
- **Response Body** (array of strings) - List of stream-related endpoints

#### Error Responses
- **404 Not Found** - Unknown version (`UnknownVersion`)
```

--------------------------------

### Inspect sample commit format using git show

Source: https://nginx.org/en/docs/contributing_changes.html

Demonstrates the expected commit message format, requiring a single-line synopsis followed by an empty line and a verbose description wrapped at 72 characters.

```diff
commit 067d766f210ee914b750d79d9284cbf8801058f3
Author: Zoey <username@example.com>
Date:   Sun Apr 5 11:31:15 2026 +0200

    Fix $request_port and $is_request_port in subrequests

    Closes #1247.

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 0c46106db..53ddf39bb 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -2453,6 +2453,8 @@ ngx_http_subrequest(ngx_http_request_t *r,
     sr->method = NGX_HTTP_GET;
     sr->http_version = r->http_version;
 
+    sr->port = r->port;
+
     sr->request_line = r->request_line;
     sr->uri = *uri;

```

--------------------------------

### Configure nginx build with auto/configure for Visual C

Source: https://nginx.org/en/docs/howto_build_on_win32.html

Runs the configure script specifying the Visual C compiler (`cl`), target paths, library locations, and SSL module options.

```shell
auto/configure \
    --with-cc=cl \
    --with-debug \
    --prefix= \
    --conf-path=conf/nginx.conf \
    --pid-path=logs/nginx.pid \
    --http-log-path=logs/access.log \
    --error-log-path=logs/error.log \
    --sbin-path=nginx.exe \
    --http-client-body-temp-path=temp/client_body_temp \
    --http-proxy-temp-path=temp/proxy_temp \
    --http-fastcgi-temp-path=temp/fastcgi_temp \
    --http-scgi-temp-path=temp/scgi_temp \
    --http-uwsgi-temp-path=temp/uwsgi_temp \
    --with-cc-opt=-DFD_SETSIZE=1024 \
    --with-pcre=objs/lib/pcre2-10.39 \
    --with-zlib=objs/lib/zlib-1.3.1 \
    --with-openssl=objs/lib/openssl-3.0.14 \
    --with-openssl-opt=no-asm \
    --with-http_ssl_module

```

--------------------------------

### GET /http/limit_reqs/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for each HTTP limit_req zone.

```APIDOC
## GET /http/limit_reqs/

### Description
Returns status information for each HTTP limit_req zone.

### Method
GET

### Endpoint
`/http/limit_reqs/`

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of limit_req zones will be output. If the "fields" value is empty, then only zone names will be output.

### Response
#### Success Response (200)
- Returns a collection of "HTTP Requests Rate Limiting" objects for all HTTP limit reqs

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Server names hash size limit error

Source: https://nginx.org/en/docs/http/server_names.html

This startup error occurs when a large number of server names are configured. First try setting server_names_hash_max_size close to the number of server names.

```text
could not build the server_names_hash,
you should increase either server_names_hash_max_size: 512
or server_names_hash_bucket_size: 32

```

--------------------------------

### GET /http/limit_conns/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for each HTTP limit_conn zone.

```APIDOC
## GET /http/limit_conns/

### Description
Returns status information for each HTTP limit_conn zone.

### Method
GET

### Endpoint
`/http/limit_conns/`

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of limit_conn zones will be output. If the "fields" value is empty, then only zone names will be output.

### Response
#### Success Response (200)
- Returns a collection of "HTTP Connections Limiting" objects for all HTTP limit conns

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Clone and build QuickJS library

Source: https://nginx.org/en/docs/njs/install.html

Builds the static libquickjs.a library with position-independent code (-fPIC) before compiling njs with QuickJS support.

```shell
git clone https://github.com/bellard/quickjs
cd quickjs
CFLAGS='-fPIC' make libquickjs.a

```

--------------------------------

### GET /

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Retrieves the list of available root endpoints in the NGINX API.

```APIDOC
## GET /

### Description
Returns a list of root endpoints.

### Method
GET

### Endpoint
/

### Response
#### Success Response (200)
- Returns an array of strings representing root endpoints.

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Initialize, populate, and traverse an ngx_queue_t

Source: https://nginx.org/en/docs/dev/development_guide.html

Demonstrates initializing a queue head, embedding queue links into custom structures, allocating nodes, and iterating over elements.

```c
typedef struct {
    ngx_str_t    value;
    ngx_queue_t  queue;
} ngx_foo_t;

ngx_foo_t    *f;
ngx_queue_t   values, *q;

ngx_queue_init(&values);

f = ngx_palloc(pool, sizeof(ngx_foo_t));
if (f == NULL) { /* error */ }
ngx_str_set(&f->value, "foo");

ngx_queue_insert_tail(&values, &f->queue);

/* insert more nodes here */

for (q = ngx_queue_head(&values);
     q != ngx_queue_sentinel(&values);
     q = ngx_queue_next(q))
{
    f = ngx_queue_data(q, ngx_foo_t, queue);

    ngx_do_smth(&f->value);
}
```

--------------------------------

### GET /stream/server_zones/{streamServerZoneName}

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns the status of a specific stream server zone.

```APIDOC
## GET /stream/server_zones/{streamServerZoneName}

### Description
Returns status of a particular stream server zone.

### Method
GET

### Endpoint
`/stream/server_zones/{streamServerZoneName}`

### Parameters
#### Path Parameters
- **streamServerZoneName** (string) - Required - The name of a stream server zone.

#### Query Parameters
- **fields** (string) - Optional - Limits which fields of the server zone will be output.

### Response
#### Success Response (200)
- **Response Body** (object) - Stream Server Zone status details

#### Error Responses
- **404 Not Found** - Server zone not found (`ServerZoneNotFound`), unknown version (`UnknownVersion`)
```

--------------------------------

### Initialize hash keys array with ngx_hash_keys_array_init

Source: https://nginx.org/en/docs/dev/development_guide.html

Prepares an ngx_hash_keys_arrays_t container with memory pools. Use NGX_HASH_LARGE if the hash is expected to hold thousands of elements.

```c
ngx_hash_keys_arrays_t  foo_keys;

foo_keys.pool = cf->pool;
foo_keys.temp_pool = cf->temp_pool;

gx_hash_keys_array_init(&foo_keys, NGX_HASH_SMALL);

```

--------------------------------

### GET /http/upstreams/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status of each HTTP upstream server group and its servers.

```APIDOC
## GET /http/upstreams/

### Description
Returns status of each HTTP upstream server group and its servers.

### Method
GET

### Endpoint
`/http/upstreams/`

### Parameters
#### Query Parameters
- **fields** (string) - Optional - Limits which fields of upstream server groups will be output. If the "fields" value is empty, only names of upstreams will be output.

### Response
#### Success Response (200)
- Returns a collection of "HTTP Upstream" objects for all HTTP upstreams

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Compile C native module into shared library with GCC

Source: https://nginx.org/en/docs/njs/native_modules.html

Compile the native module source into a shared library (.so) targeting the same architecture as NGINX. Specify the include path to the directory containing quickjs.h.

```bash
gcc -fPIC -shared -I/path/to/quickjs -o mymodule.so mymodule.c

```

--------------------------------

### GET /http/caches/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for each cache configured in the HTTP configuration.

```APIDOC
## GET /http/caches/

### Description
Returns status of each cache configured by proxy_cache_path and other `*_cache_path` directives.

### Method
GET

### Endpoint
`/http/caches/`
```

--------------------------------

### Legacy NGINX catch-all redirect for pre-0.9.1 versions

Source: https://nginx.org/en/docs/http/converting_rewrite_rules.html

Redirects unmatched traffic to example.com using rewrite in NGINX versions prior to 0.9.1.

```nginx
    rewrite      ^ http://example.com$request_uri?;

```

--------------------------------

### GET /http/location_zones/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for all configured HTTP location zones.

```APIDOC
## GET /http/location_zones/

### Description
Returns status information for each HTTP location zone.

### Method
GET

### Endpoint
`/http/location_zones/`

### Parameters
#### Query Parameters
- **fields** (string, optional) - Limits which fields of location zones will be output. If the `fields` value is empty, then only zone names will be output.

### Response
#### Success Response (200)
- Returns a collection of "HTTP Location Zone" objects for all HTTP location zones

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Implement QuickJS native module in C

Source: https://nginx.org/en/docs/njs/native_modules.html

Define exported C functions and register them in the required js_init_module entry point. Use QuickJS memory allocation functions (js_malloc, js_free) rather than standard library malloc and free.

```c
#include <quickjs.h>

#define countof(x) (sizeof(x) / sizeof((x)[0]))

/* Add two numbers */
static JSValue
js_add(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)
{
    int a, b;

    if (argc < 2) {
        return JS_ThrowTypeError(ctx, "expected 2 arguments");
    }

    if (JS_ToInt32(ctx, &a, argv[0]) < 0) {
        return JS_EXCEPTION;
    }

    if (JS_ToInt32(ctx, &b, argv[1]) < 0) {
        return JS_EXCEPTION;
    }

    return JS_NewInt32(ctx, a + b);
}

/* Reverse a string */
static JSValue
js_reverse_string(JSContext *ctx, JSValueConst this_val, int argc,
    JSValueConst *argv)
{
    char        *reversed;
    size_t       i, len;
    JSValue      result;
    const char  *str;

    if (argc < 1) {
        return JS_ThrowTypeError(ctx, "expected 1 argument");
    }

    str = JS_ToCStringLen(ctx, &len, argv[0]);
    if (!str) {
        return JS_EXCEPTION;
    }

    reversed = js_malloc(ctx, len + 1);
    if (!reversed) {
        JS_FreeCString(ctx, str);
        return JS_EXCEPTION;
    }

    for (i = 0; i < len; i++) {
        reversed[i] = str[len - 1 - i];
    }
    reversed[len] = '\0';

    result = JS_NewString(ctx, reversed);

    js_free(ctx, reversed);
    JS_FreeCString(ctx, str);

    return result;
}

/* Module function list */
static const JSCFunctionListEntry js_module_funcs[] = {
    JS_CFUNC_DEF("add", 2, js_add),
    JS_CFUNC_DEF("reverseString", 1, js_reverse_string),
};

/* Module initialization */
static int
js_module_init(JSContext *ctx, JSModuleDef *m)
{
    return JS_SetModuleExportList(ctx, m, js_module_funcs,
                                  countof(js_module_funcs));
}

/* Required entry point */
JSModuleDef *
js_init_module(JSContext *ctx, const char *module_name)
{
    JSModuleDef  *m;

    m = JS_NewCModule(ctx, module_name, js_module_init);
    if (!m) {
        return NULL;
    }

    JS_AddModuleExportList(ctx, m, js_module_funcs,
                           countof(js_module_funcs));

    return m;
}

```

--------------------------------

### GET /http/server_zones/

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information for each configured HTTP server zone.

```APIDOC
## GET /http/server_zones/

### Description
Returns status information for each HTTP server zone.

### Method
GET

### Endpoint
`/http/server_zones/`

### Parameters
#### Query Parameters
- **fields** (string, optional) - Limits which fields of server zones will be output. If the `fields` value is empty, then only server zone names will be output.

### Response
#### Success Response (200)
- Returns a collection of "HTTP Server Zone" objects for all HTTP server zones

#### Error Responses
- **404** - Unknown version (`UnknownVersion`), returns Error
```

--------------------------------

### Configure FLV pseudo-streaming in NGINX

Source: https://nginx.org/en/docs/http/ngx_http_flv_module.html

Enables Flash Video pseudo-streaming within a matching location block. Requests with a `start` query argument will return file contents starting at the requested byte offset with an FLV header prepended. The module must be enabled at build time using `--with-http_flv_module`.

```nginx
location ~ \.flv$ {
    flv;
}
```

--------------------------------

### Apache redirect to main site using RewriteCond

Source: https://nginx.org/en/docs/http/converting_rewrite_rules.html

Matches requests directed to example.org and rewrites them to www.example.org in Apache.

```apache
RewriteCond  %{HTTP_HOST}  example.org
RewriteRule  (.*)          http://www.example.org$1

```

--------------------------------

### Default mp4_start_key_frame directive

Source: https://nginx.org/en/docs/http/ngx_http_mp4_module.html

Shows the default setting for starting output video with a keyframe.

```nginx
mp4_start_key_frame off;

```

--------------------------------

### Combine AIO and sendfile with directio

Source: https://nginx.org/en/docs/http/ngx_http_core_module.html

Uses AIO for files larger than or equal to the directio size threshold and sendfile for smaller files.

```nginx
location /video/ {
    sendfile       on;
    aio            on;
    directio       8m;
}

```

--------------------------------

### Match location with prefix compression

Source: https://nginx.org/en/docs/http/ngx_http_core_module.html

Prefix matching location example demonstrating how URIs such as "//scripts/one.php" match after slash compression.

```nginx
location /scripts/ {
    ...
}
```

--------------------------------

### GET /resolvers/{resolverZoneName}

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns statistics and status information for a specific resolver zone.

```APIDOC
## GET /resolvers/{resolverZoneName}

### Description
Returns statistics stored in a particular resolver zone.

### Method
GET

### Endpoint
`/resolvers/{resolverZoneName}`

### Parameters
#### Path Parameters
- **resolverZoneName** (string) - Required - The name of a resolver zone.
```

--------------------------------

### Configure client_body_temp_path hierarchy and sample file path

Source: https://nginx.org/en/docs/http/ngx_http_core_module.html

Defines a two-level subdirectory hierarchy under the specified directory for temporary client request body files along with an example resulting file path.

```nginx
client_body_temp_path /spool/nginx/client_temp 1 2;

```

```text
/spool/nginx/client_temp/7/45/00000123457

```

--------------------------------

### GET /http/limit_reqs/{httpLimitReqZoneName}

Source: https://nginx.org/en/docs/http/ngx_http_api_module.html

Returns status information of a particular HTTP limit_req zone.

```APIDOC
## GET /http/limit_reqs/{httpLimitReqZoneName}

### Description
Returns status of a particular HTTP limit_req zone.

### Method
GET

### Endpoint
`/http/limit_reqs/{httpLimitReqZoneName}`

### Parameters
#### Path Parameters
- **httpLimitReqZoneName** (string) - Required - The name of a limit_req zone.

#### Query Parameters
- **fields** (string) - Optional - Limits which fields of the limit_req zone will be output.

### Response
#### Success Response (200)
- Returns HTTP Requests Rate Limiting

#### Error Responses
- **404** - limit_req not found (`LimitReqNotFound`), unknown version (`UnknownVersion`), returns Error
```
Tokens:
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