Alternatively, if you don't have a way to provide a command line option like `--root-path` or equivalent, you can set the `root_path` parameter when creating your FastAPI app:

{* ../../docs_src/behind_a_proxy/tutorial002.py hl[3] *}

Passing the `root_path` to `FastAPI` would be the equivalent of passing the `--root-path` command line option to Uvicorn or Hypercorn.

### About `root_path` { #about-root-path }

    class ConstructorTests {

        @Test
        @DisplayName("Should create echo request with correct command")
        void testConstructor() throws Exception {
            Smb2EchoRequest request = new Smb2EchoRequest(mockConfig);
            assertNotNull(request);

            // Verify command is set to SMB2_ECHO (0x000D)
            assertEquals(0x000D, request.getCommand());

            // Verify configuration is set

- Initiate an id_token request to the WSO2 Identity Server, over a known [grant type](https://docs.wso2.com/display/IS540/OAuth+2.0+Grant+Types). For example, the following cURL command illustrates the syntax of an id_token request that can be initiated over the [Client Credentials Grant](https://docs.wso2.com/display/IS540/Client+Credentials+Grant) grant type.

            (byte) 0x00, (byte) 0x00, // ChannelSequence
            (byte) 0x00, (byte) 0x00, // Reserved
            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, // Status
            (byte) 0x00, (byte) 0x00, // Command
            (byte) 0x00, (byte) 0x00, // CreditRequest/CreditResponse
            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, // Flags
            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, // NextCommand

 */

package jcifs.smb1.smb1;

class SmbComDeleteDirectory extends ServerMessageBlock {

    SmbComDeleteDirectory(final String directoryName) {
        this.path = directoryName;
        command = SMB_COM_DELETE_DIRECTORY;
    }

    @Override
    int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override

import jcifs.RuntimeCIFSException;
import jcifs.internal.SmbNegotiationRequest;
import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.util.Strings;

/**
 * SMB1 Negotiate Protocol request message.
 *
 * This command is used to negotiate the SMB protocol dialect
 * and security parameters between client and server.
 */
public class SmbComNegotiate extends ServerMessageBlock implements SmbNegotiationRequest {

    }

    /**
     * Executes a batch update.
     *
     * @param ps
     *            {@link PreparedStatement}. Must not be {@literal null}.
     * @return An array of the number of rows affected by each command in the batch.
     * @throws SQLRuntimeException
     *             If a {@link SQLException} occurs.
     */
    public static int[] executeBatch(final PreparedStatement ps) throws SQLRuntimeException {

    String domain, lastName = null;
    int serverTypes;

    NetServerEnum2(final String domain, final int serverTypes) {
        this.domain = domain;
        this.serverTypes = serverTypes;
        command = SMB_COM_TRANSACTION;
        subCommand = NET_SERVER_ENUM2; // not really true be used by upper logic
        name = "\\PIPE\\LANMAN";

        maxParameterCount = 8;
        maxDataCount = 16384;

import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Tree Connect request message.
 *
 * This command is used to connect to a shared resource
 * on the server, such as a file share or printer.
 *
 * @author mbechler
 */
public class Smb2TreeConnectRequest extends ServerMessageBlock2Request<Smb2TreeConnectResponse> {

import java.io.UnsupportedEncodingException;

class SmbComNegotiate extends ServerMessageBlock {

    private static final String DIALECTS = "\u0002NT LM 0.12\u0000";

    SmbComNegotiate() {
        command = SMB_COM_NEGOTIATE;
        flags2 = DEFAULT_FLAGS2;
    }

    @Override
    int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override