/** Helper for query processing and transformation. */
    @Resource
    protected QueryHelper queryHelper;

    /** Configuration for query field mappings and processing. */
    @Resource
    protected QueryFieldConfig queryFieldConfig;

    /** Helper for role-based query filtering and security. */
    @Resource
    protected RoleQueryHelper roleQueryHelper;

    /** Helper for managing user information and authentication. */

The benefit of raising an exception over returning a value will be more evident in the section about Dependencies and Security.

Interceptors can be chained. Suppose you have both a compressing interceptor and a checksumming interceptor: you'll need to decide whether data is compressed and then checksummed, or checksummed and then compressed. OkHttp uses lists to track interceptors, and interceptors are called in order.

![Interceptors Diagram](../assets/images/******@****.***)

### Application Interceptors

  ) {
    if (streamId == 0) throw IOException("PROTOCOL_ERROR: TYPE_HEADERS streamId == 0")

    val endStream = (flags and FLAG_END_STREAM) != 0
    val padding = if (flags and FLAG_PADDED != 0) source.readByte() and 0xff else 0

    var headerBlockLength = length
    if (flags and FLAG_PRIORITY != 0) {
      readPriority(handler, streamId)
      headerBlockLength -= 5 // account for above read.
    }

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### Contributing code

...and declare its type as the model you created, `Item`.

## Results { #results }

With just that Python type declaration, **FastAPI** will:

* Read the body of the request as JSON.
* Convert the corresponding types (if needed).
* Validate the data.
    * If the data is invalid, it will return a nice and clear error, indicating exactly where and what was the incorrect data.
* Give you the received data in the parameter `item`.

| maxValiditySeconds | integer (>= 900 seconds and < 365 days) | Maximum allowed expiry duration for the credentials    |
| claims             | key-value pairs                         | Claims to be associated with the requested credentials |

The keys "exp", "parent" and "sub" in the `claims` object are reserved and if present are ignored by MinIO.