System.setProperty("abc", "123");

        value = "${abc}";
        assertEquals("123", ResourceUtil.resolve(value));

        value = "xxx${abc}zzz";
        assertEquals("xxx123zzz", ResourceUtil.resolve(value));

        value = "${abc.xyz}";
        assertEquals(value, ResourceUtil.resolve(value));

        System.setProperty("abc.xyz", "789");

# Get Current User

In the previous chapter the security system (which is based on the dependency injection system) was giving the *path operation function* a `token` as a `str`:

//// tab | Python 3.9+

```Python hl_lines="12"
{!> ../../docs_src/security/tutorial001_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="11"
{!> ../../docs_src/security/tutorial001_an.py!}
```

////

    TARGET_ARCH=s390x
elif [[ ${LOCAL_ARCH} == ppc64le ]]; then
    TARGET_ARCH=ppc64le
else
    echo "This system's architecture, ${LOCAL_ARCH}, isn't supported"
    exit 1
fi

LOCAL_OS=$(uname)

# Pass environment set target operating-system to build system
if [[ ${TARGET_OS} ]]; then
    # Target explicitly set
    :
elif [[ $LOCAL_OS == Linux ]]; then
    TARGET_OS=linux

      Headers responseHeaders = response.headers();
      for (int i = 0; i < responseHeaders.size(); i++) {
        System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
      }

      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {
    new SynchronousGet().run();
  }

        if ( System.getProperties().containsKey(TestProperties.TEST_SERVER) ) {
            configs.put("properties", toMap(System.getProperties()));
        }

        if ( System.getProperties().containsKey(TestProperties.TEST_CONFIG_DIR) ) {
            try {
                Path configDir = Paths.get(System.getProperty(TestProperties.TEST_CONFIG_DIR));

    if (!testData.scheme.isEmpty() && !HTTP_URL_SCHEMES.contains(testData.scheme)) {
      System.err.println("Ignoring unsupported scheme ${testData.scheme}")
      return
    }

    if (!testData.base!!.startsWith("https:") &&
      !testData.base!!.startsWith("http:") &&
      testData.base != "about:blank"
    ) {
      System.err.println("Ignoring unsupported base ${testData.base}")
      return
    }

    try {

cff-version: 1.2.0
message: "If you use TensorFlow in your research, please cite it using these metadata. Software is available from tensorflow.org."
title: TensorFlow, Large-scale machine learning on heterogeneous systems

                }
                System.arraycopy( str.getBytes( UNI_ENCODING ), 0,
                                    dst, dstIndex, str.length() * 2 );
                dstIndex += str.length() * 2;
                dst[dstIndex++] = (byte)'\0';
                dst[dstIndex++] = (byte)'\0';
            } else {
                byte[] b = str.getBytes( OEM_ENCODING );
                System.arraycopy( b, 0, dst, dstIndex, b.length );

message ScaleIOPersistentVolumeSource {
  // gateway is the host address of the ScaleIO API Gateway.
  optional string gateway = 1;

  // system is the name of the storage system as configured in ScaleIO.
  optional string system = 2;

  // secretRef references to the secret for ScaleIO user and other
  // sensitive information. If this is not provided, Login operation will fail.

     */
    static final String[] DOS_ERROR_MESSAGES = {
        "The operation completed successfully.", "Incorrect function.", "Incorrect function.", "The system cannot find the file specified.",
        "Bad password.", "The system cannot find the path specified.", "reserved",
        "The client does not have the necessary access rights to perform the requested function.", "Access is denied.",