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ИС отвечающая за денежные транзацкции для банка по надежности может быть отнесена к категории
Критически важное для предприятия
Критически важное для бизнеса
Вспомогательное
Средства офисной автоматизации

ИС, отвечающая за денежные транзакции для банка, по надежности может быть отнесена к категории **Критически важное для бизнеса**. Это связано с тем, что такие системы требуют высокой надежности, безопасности и доступности, так как они напрямую влияют на финансовые операции и репутацию банка.

    # SSR only location for caching api
    location ~* ^/server/api/(?!health$)(.*)$ {

      # get Domain header for proxy to api
      if ($http_Domain) {
        set $domain $http_Domain;
      }

      set $key "nginx-cache-ssr:$request_method:$domain$request_uri";
      set $skip_cache 0;
      set $exp_time 120;

      # Track incoming cookies
      set $active_cookies $http_cookie;

      # Unset cookies for static assets
      if ($request_uri ~* "\.(css|png|gif|ico|svg|jpg|jpeg|webp)") {
        set $active_cookies "";  # Ignore cookies for static assets
      }

      # Strip query parameters for feeds
      if ($request_uri ~* "(feeds)") {
        rewrite ^(.*)\?.*$ $1 break;  # Remove query string from feeds
      }

      # Check the request method for caching logic
      if ($request_method = POST) {
        set $skip_cache 1;  # Skip caching for POST requests
      }

      access_by_lua_block {
        local auth_header = ngx.var.http_authorization
        if auth_header then
          ngx.var.skip_cache = 1  -- Set skip_cache to 1 if Authorization header is present
        end
      }

      srcache_fetch_skip $skip_cache;   # Control fetching from cache based on variable
      srcache_store_skip $skip_cache;   # Control storing in cache based on variable

      srcache_response_cache_control off;
      srcache_store_statuses 200 201 301 302 307 308 404 503;

      set_escape_uri $escaped_key $key;

      # Try to fetch from the cache
      srcache_fetch GET /redis-fetch $key;

      # If cache misses, store the response
      srcache_store PUT /redis-store key=$escaped_key&exptime=$exp_time;

      # Debugging headers
      # more_set_headers 'X-Cache-Fetch-Status $srcache_fetch_status';
      # more_set_headers 'X-Cache-Store-Status $srcache_store_status';

      # Restore cookies before sending the response
      add_header Set-Cookie $active_cookies;

      # Pass to the backend if cache missed
      proxy_set_header Domain $domain;
      proxy_set_header Accept-Encoding "";
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

      rewrite ^/server/api/(.*)$ /$1 break;

      proxy_pass http://api:3000;
    }

    location /admin {
      proxy_pass http://front-admin:4000;
    }

    location /api/health {
      proxy_pass http://front-site:3001;
    }

    location /redis-fetch {
      internal;
      set         $redis_key $args;

      redis_pass  redis-cache-replicas:6379;
    }

    location /redis-store {
      internal;
      set_unescape_uri  $key $arg_key ;
      redis2_query      set $key $echo_request_body;
      redis2_query      expire $key $arg_exptime;

      redis2_pass       redis-cache-master:6379;
    }

what is wrong with this config? why request /server/api/site/platform proxies to api as is? i need /site/platform request to api

The issue you're facing arises from the rewrite rule in the `location ~* ^/server/api/(?!health$)(.*)$` block. The rewrite rule you have:

```nginx
rewrite ^/server/api/(.*)$ /$1 break;
```

This will convert requests like `/server/api/site/platform` into `/site/platform`, which is the intended behavior. However, the reason for not directly rewriting correctly as you expect might be caused by how NGINX evaluates the request and possibly the placement of the `proxy_pass` directive.

### Your Configuration Issue

Currently, your rewrite rule is placed before the `proxy_pass`. The way NGINX processes the configuration is sequentially, and once it hits `proxy_pass`, it stops processing further rewrite directives. So if the rewrite fails or doesn't happen, the request would just be passed to the backend as is.

### Recommended Changes

Here’s how to ensure that the request is rewritten correctly before being passed to the backend:

1. **Adjust the Proxy Pass Order:** 
   Move the `rewrite` directive after setting some variables to ensure it recognizes the intended format before routing the request. Ensure that you only set the `proxy_pass` after you've rewritten the URL.

2. **Ensure the Rewrite Rule is Correct:** 
   Verify the rewrite rule correctly matches the intended patterns of the incoming request.

### Suggested Configuration

Here’s a corrected version of your location configuration:

```nginx
location ~* ^/server/api/(?!health$)(.*)$ {
  
  # ... existing code ...

  # Adjust the rewrite directive
  rewrite ^/server/api/(.*)$ /$1 break;

  # Pass to the backend after rewrite
  proxy_pass http://api:3000;

  # Setup any necessary headers
  proxy_set_header Domain $domain;
  proxy_set_header Accept-Encoding "";
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

  # ... existing code ...
}
```

### Additional Considerations

- **Caching Logic:** Verify the cache keys and logic to ensure that the requests aren't inadvertently skipped or stored.
- **Debugging:** If the issue persists, use the commented debug headers to inspect cache states. This will help trace whether a cache hit or miss occurred.
- **Testing:** Make sure to test thoroughly for various endpoints to ensure the rewrite logic is consistently applied.

This setup should now correctly rewrite `/server/api/site/platform` to `/site/platform` and then forward it to the appropriate backend at `api:3000`.

the problem is tat it is not. all you recoomendations already exests in the code i gave you

Thank you for clarifying that my initial understanding wasn't quite right. Given that the issues persist despite following best practices in the configuration you provided, let's perform some deeper analysis of the specific section of the NGINX configuration and its components:

### Analyzing Your Configuration

1. **Rewrite Directive**
   You rightly checked that the rewrite is set up correctly:
   ```nginx
   rewrite ^/server/api/(.*)$ /$1 break;
   ```
   This should rewrite `/server/api/site/platform` to `/site/platform`. If it's passing through to the backend as `/server/api/site/platform`, then the rewrite might not be functioning as expected.

2. **Request Flow and Processing Order**
   Ensure that the whole `location` directive is being matched correctly without overlaps with other location blocks above or below it. NGINX processes requests in the order they’re defined.

3. **Proxy Pass Location**
   The `proxy_pass` directive allows requests to be passed to the backend server. If the rewrite has not happened, then the request would go through to the API in its original form. Since you have `proxy_pass http://api:3000;` after the rewrite directive, it should apply the rewrite before forwarding the request.

### Additional Debugging Steps

1. **Access Logs**
   Enable detailed logging to inspect the flow of requests for debugging:
   ```nginx
   access_log /var/log/nginx/my_access.log combined;
   ```
   This will give you detailed information on every request hitting your server and the rewritten URI.

2. **Test in Isolation**
   Simplify the location block temporarily to isolate the problem:
   ```nginx
   location ~* ^/server/api/(.*)$ {
       rewrite ^/server/api/(.*)$ /$1 break;
       # Just log the request to see if it's being rewritten
       access_by_lua_block {
           ngx.log(ngx.ERR, "Rewritten URI: " .. ngx.var.request_uri)
       }
       proxy_pass http://api:3000;
   }
   ```
   This will log the rewritten URI, helping you confirm whether the rewrite is effective.

3. **NGINX Syntax Check**
   Always ensure that your NGINX configuration file is valid:
   ```bash
   nginx -t
   ```
   This will check for syntax errors that might be preventing the expected behavior.

4. **Conflicting Locations**
   Check if there are any conflicting location blocks defined elsewhere in your configuration that may cause unexpected behavior:
   - Look for other `location` blocks that might catch the `/server/api/...` path before reaching this one.

5. **Regex and Order of Match**
   NGINX matches locations in a specific order. If you have a more generic location block that matches before the specified one, it could cause unexpected behaviors. Consider revising them to ensure that the more specific block is prioritized.

### Example of a Potential Issue with Location Blocks
Make sure your other location blocks (if any) do not unintentionally overlap and overshadow this configuration.

### Conclusion
Since your configuration appears structurally valid, using extensive logging will help identify where things are going wrong. If you find that the rewriting indeed isn’t happening correctly, consider checking the NGINX version, as bugs do exist that affect certain features in various releases. If none of the steps resolve the issue, consider restarting NGINX after every configuration change to ensure that the changes are loaded properly.

If you continue to have problems, posting the entire NGINX configuration may reveal further insights.

how to print $key in this lua block to error log

To print a variable like `$key` in a Lua block for logging in NGINX, you can use the `ngx.log` function, which can log messages at different log levels (e.g., `ngx.ERR`, `ngx.NOTICE`, etc.). 

Since `$key` is a variable from the NGINX context, you'll need to access it using `ngx.var.key` inside the Lua block.

Here's how you can modify your Lua block to log the value of `$key` to the error log:

```nginx
access_by_lua_block {
    -- Get the value of the NGINX variable $key
    local key_value = ngx.var.key

    -- Log the value of $key
    ngx.log(ngx.ERR, "Value of key: " .. tostring(key_value))

    -- Optional: Check for Authorization header and set skip_cache if it exists
    local auth_header = ngx.var.http_authorization
    if auth_header then
        ngx.var.skip_cache = 1  -- Set skip_cache to 1 if Authorization header is present
    end
}
```

### Explanation:
- `local key_value = ngx.var.key` retrieves the NGINX variable `$key`.
- `ngx.log(ngx.ERR, "Value of key: " .. tostring(key_value))` logs the value of `key_value` at the `ERR` level. You can replace `ngx.ERR` with other log levels such as `ngx.NOTICE` or `ngx.INFO` depending on how you want to categorize this log message.
- `tostring(key_value)` is used to ensure that the output is a string, which avoids any potential issues if the variable is `nil`.

### Log Level
- **ngx.ERR**: This logs at the error level, which is typically written to the error log file and can signal important issues.
- You might want to use **ngx.DEBUG** instead if you’re only interested in debugging information (ensure your logging level is set to capture debug logs).

### Enabling Debug Logs in NGINX
If you use debug-level logging (e.g., `ngx.DEBUG`), make sure your NGINX configuration allows for this level. Under the `http` block in your NGINX configuration file, you can enable debug logging like this:

```nginx
http {
    ...
    error_log /var/log/nginx/error.log debug;
    ...
}
```

### Restart NGINX
After modifying the configuration, don't forget to test the configuration with `nginx -t` and restart NGINX with:

```bash
sudo systemctl restart nginx
```

This way, you will see logs for the `$key` variable as well, which can help you in diagnosing any issues with your configuration effectively.

why key_value?

The term `key_value` in the suggested Lua code block is merely a variable name that I proposed for holding the value retrieved from the NGINX variable `$key`. It's not a special or reserved name—it's simply a logical name for that context to make the code clearer and more understandable.

### Variable Naming Conventions
1. **Naming Convention:** I used `key_value` to indicate that it holds the value of the key variable. However, you can name it anything you prefer—some common naming conventions include:
   - `key`
   - `cache_key`
   - `nginx_key_value`

2. **Clarity:** Use a name that accurately describes what the variable represents in your application logic. This can help make your code easier to read and maintain.

### Example:
If you prefer, you can simply call the variable `key` like this:

```nginx
access_by_lua_block {
    -- Get the value of the NGINX variable $key
    local key = ngx.var.key

    -- Log the value of key
    ngx.log(ngx.ERR, "Value of key: " .. tostring(key))

    -- Optional: Check for Authorization header and set skip_cache if it exists
    local auth_header = ngx.var.http_authorization
    if auth_header then
        ngx.var.skip_cache = 1  -- Set skip_cache to 1 if Authorization header is present
    end
}
```

### Conclusion
The name `key_value` was simply a suggestion to provide clarity, and you are free to use whatever naming convention makes the most sense in your context. The functionality will remain unaffected regardless of your choice of variable name. In the example above, whether you name it `key`, `key_value`, or any other valid Lua variable name, it will correctly log the value of the NGINX variable `$key`.

i mean why not just tostring(ngx.var.key)

You’re absolutely correct! Using `tostring(ngx.var.key)` directly in the log statement is a perfectly valid approach and simplifies the code. 

Here's how you can directly log the value of the NGINX variable `$key` without assigning it to a separate variable:

```nginx
access_by_lua_block {
    -- Log the value of $key directly
    ngx.log(ngx.ERR, "Value of key: " .. tostring(ngx.var.key))

    -- Optional: Check for Authorization header and set skip_cache if it exists
    local auth_header = ngx.var.http_authorization
    if auth_header then
        ngx.var.skip_cache = 1  -- Set skip_cache to 1 if Authorization header is present
    end
}
```

### Advantages of Direct Logging
1. **Simplicity:** This approach is more concise because it eliminates the need for an intermediary variable while achieving the same result.
2. **Readability:** If you’re only using the variable once, it can often enhance readability to directly log the output rather than introducing additional variables that may not be needed later.

### When to Use an Intermediate Variable
Using an intermediate variable is beneficial in scenarios where:
- You plan to access the same value multiple times for different purposes.
- You need to perform additional processing or manipulation of the value before logging or using it elsewhere.
- You want to make the code cleaner when dealing with complex expressions, which makes debugging easier.

### Conclusion
In your specific case, since you were only interested in logging `$key`, using `tostring(ngx.var.key)` directly is an elegant and efficient solution. Thank you for bringing this up!

Describe the significance, strengths, weaknesses, and hurdles of the Indian name 'Faizan', strictly keep it under 350 characters. add emojis if you can to make it more attractive.

**Significance**: Faizan means "benefit" or "grace" in Arabic, symbolizing positivity and generosity. 🌟

**Strengths**: It has a melodic sound and cultural depth, resonating well in diverse communities. 🎶

**Weaknesses**: It might be mispronounced or overlooked in non-Asian contexts. 😅

**Hurdles**: Cultural stereotypes and biases may affect perceptions. 🚧

Пусть колея ведет к великим сказкам,
Стальные крылья режут небосклон.
Гордимся мы профессией прекрасной̆ —
Машинист — дорог железных чемпион!
 

Это прекрасные строки, полные гордости и вдохновения для людей, работающих на железных дорогах! Профессия машиниста действительно требует не только высоких навыков, но и смелости, ответственности и любви к своему делу. Железные дороги связывают города и страны, а машинисты являются истинными мастерами своего дела, обеспечивая комфорт и безопасность путешествий. Если хотите, могу помочь с созданием продолжения или обсудить тематику.

поменяй первую и вторую строчку

Конечно! Вот изменённый вариант:

Стальные крылья режут небосклон,  
Пусть колея ведет к великим сказкам.  
Гордимся мы профессией прекрасной̆ —  
Машинист — дорог железных чемпион!  

Если нужно что-то ещё изменить или добавить, дайте знать!

измени первую и вторую 

Вот вариант с изменёнными первой и второй строками:

Гордимся мы профессией прекрасной̆ —  
Пусть колея ведет к великим сказкам.  
Стальные крылья режут небосклон,  
Машинист — дорог железных чемпион!  

Если нужны другие изменения или дополнения, сообщите!