# Headers

To specify headers on all client requests, you can set the headers for the SolidClient/SolidSyncClient. To read the response headers, you can use the **`getHeaders()`** method for the resource:

For example:

```java
import com.inrupt.client.Headers;
import com.inrupt.client.solid.SolidClient;

// ...
// ...

final SolidClient mySolidClient = SolidClient.getClientBuilder()
                .headers(Headers.of(Map.of("x-request-id", List.of("7492595229158059")))).build()
                .session(session);

client.read(URI.create(resourceURL), MyExtendedRDF.class)
    .thenAccept(responseResource -> {
       List<String> responseHeaderValues = responseResource.getHeaders().allValues("x-request-id");
       // ...
});
```

To specify headers per request, you can set the headers at the request operation level. To read the response headers, you can use the **`getHeaders()`** method for the resource:

For example:

```java
import com.inrupt.client.Headers;
import com.inrupt.client.solid.SolidClient;

// ...
// ...

final SolidClient mySolidClient = SolidClient.getClient().session(session);

Headers myHeaders = Headers.of(Map.of("x-request-id", List.of("7492595229158059")));

mySolidClient.read(URI.create(resourceURL), myHeaders, Expense.class)
   .thenAccept(responseExpense -> {
       List<String> responseHeaderValues = responseExpense.getHeaders().allValues("x-request-id");
       // ...
});
```

See:

* [Headers](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/Headers.html)
* [SolidRDFSource.getHeaders()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidRDFSource.html#method.summary)
* [SolidContainer.getHeaders()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidContainer.html#method.summary)
* [SolidNonRDFSource.getHeaders()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidNonRDFSource.html#method.summary)

### Additional Information

Alternatively, you can also use the resource class’ **`getMetadata()`** methods:

* [SolidRDFSource.getMetadata()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidRDFSource.html#getMetadata\(\))
* [SolidContainer.getMetadata()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidContainer.html#method.summary)
* [SolidNonRDFSource.getMetadata()](https://api.docs.inrupt.com/docs/developer-tools/api/java/inrupt-client/latest/com/inrupt/client/solid/SolidNonRDFSource.html#getMetadata\(\))

The **`getMetadata()`** methods return Solid-specific data (parsed into Java types) from a resource’s response headers. To access the complete set of response headers, use the **`getHeaders()`** methods.