그러면 브라우저는 백엔드에 HTTP `OPTIONS` 요청을 보내고, 백엔드에서 이 다른 출처(`http://localhost:8080`)와의 통신을 허가하는 적절한 헤더를 보내면, 브라우저는 프론트엔드의 자바스크립트가 백엔드에 요청을 보낼 수 있도록 합니다.

이를 위해, 백엔드는 "허용된 출처(allowed origins)" 목록을 가지고 있어야만 합니다.

이 경우, 프론트엔드가 제대로 동작하기 위해 `http://localhost:8080`을 목록에 포함해야 합니다.

## 와일드카드

모든 출처를 허용하기 위해 목록을 `"*"` ("와일드카드")로 선언하는 것도 가능합니다.

	byteBuf      []byte
	finished     bool
}

func (b *streamingBitrotWriter) Write(p []byte) (int, error) {
	if len(p) == 0 {
		return 0, nil
	}
	if b.finished {
		return 0, errors.New("bitrot write not allowed")
	}
	if int64(len(p)) > b.shardSize {
		return 0, errors.New("unexpected bitrot buffer size")
	}
	if int64(len(p)) < b.shardSize {
		b.finished = true
	}
	b.h.Reset()
	b.h.Write(p)

    @SuppressWarnings("CatchingUnchecked") // sneaky checked exception
    public int add(int a, int b) {
      try {
        return adder.add(a, b);
      } catch (Exception e) { // sneaky checked exception
        // swallow!
        return 0;
      }
    }

    @Override
    public String toString() {
      return adder.toString();
    }
  }

  public interface Arithmetic extends Adder {

        void testInitSecContextNullToken() throws Exception {
            DummySSPContext ctx = new DummySSPContext(new byte[] { 1 }, false, null, null, 0, false);
            // len == 0 is allowed and returns empty token
            assertArrayEquals(new byte[0], ctx.initSecContext(null, 0, 0));
            // len > 0 is invalid
            assertThrows(CIFSException.class, () -> ctx.initSecContext(null, 0, 1));

Socket writes are guarded by the Http2Writer. Only one stream can write at a time so that messages are not interleaved. Writes are either made by application-layer threads or the do-stuff-later pool.

### Holding multiple locks

You're allowed to take the Http2Connection lock while holding the Http2Writer lock. But not vice-versa. Because taking the Http2Writer lock can block.

DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'

# Collect all arguments for the java command:
#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
#     and any embedded shellness will be escaped.
#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be

                       Version 3, 19 November 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU Affero General Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure

    public static final String MAVEN_STYLE_MOJO_DEFAULT = "f:green";
    public static final String MAVEN_STYLE_PROJECT_DEFAULT = "f:cyan";

    /**
     * Maven output color mode.
     * Allowed values are <code>auto</code>, <code>always</code>, <code>never</code>.
     *
     * @since 4.0.0
     */
    @Config(defaultValue = "auto")

 * to a BloomFilter of M bits and k hash functions. These strategies are part of the serialized form
 * of the Bloom filters that use them, thus they must be preserved as is (no updates allowed, only
 * introduction of new versions).
 *
 * <p>Important: the order of the constants cannot change, and they cannot be deleted - we depend on
 * their ordinal for BloomFilter serialization.
 *

        DummyPlainSMB next = new DummyPlainSMB();
        DummyAndXBlock block = new DummyAndXBlock(next);
        block.customBatchLimit = 2; // batchLevel (0) < limit (2) so chaining allowed
        block.uid = 0x1234;
        block.useUnicode = true;

        byte[] buf = new byte[256];
        int n = block.writeAndXWireFormat(buf, 0);

        assertTrue(n > 0);