You would probably do this just once, the first time, when setting everything up.

/// tip

This Domain Name part is way before HTTPS, but as everything depends on the domain and the IP address, it's worth mentioning it here.

///

### DNS

Now let's focus on all the actual HTTPS parts.

            logger.info("");
            infoLine('-');
            String name = event.getProject().getName();
            infoMain("Skipping " + name);
            logger.info("{} was not built because a module it depends on failed to build.", name);

            infoLine('-');
        }
    }

    @Override
    public void projectStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled()) {
            init();

    if (expected != actual) {
      fail("Expected for " + a + " " + op + " " + b + " = " + expected + ", but got " + actual);
    }
  }

  // Depends on the correctness of BigIntegerMath.factorial.
  @GwtIncompatible // TODO
  public void testFactorial() {
    for (int n = 0; n <= 50; n++) {
      BigInteger expectedBig = BigIntegerMath.factorial(n);

    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "
            + "The correctness of CycleDetectingReentrantReadWriteLock depends on "
            + "the fact that the shadowed ReadLock and WriteLock are never used or "
            + "exposed by the superclass implementation. If the implementation has "

    assertEquals(
        "Unexpected number of public methods in ReentrantReadWriteLock. "
            + "The correctness of CycleDetectingReentrantReadWriteLock depends on "
            + "the fact that the shadowed ReadLock and WriteLock are never used or "
            + "exposed by the superclass implementation. If the implementation has "

	return ""
}

// Returns number of errors that occurred the most (incl. nil) and the
// corresponding error value. NB When there is more than one error value that
// occurs maximum number of times, the error value returned depends on how
// golang's map orders keys. This doesn't affect correctness as long as quorum
// value is greater than or equal to simple majority, since none of the equally
// maximal values would occur quorum or more number of times.

这些细节只是特定的实现方式。

对 OAuth2 来说，都只是字符串而已。

///

## 获取 `username` 和 `password` 的代码

接下来，使用 **FastAPI** 工具获取用户名与密码。

### `OAuth2PasswordRequestForm`

首先，导入 `OAuth2PasswordRequestForm`，然后，在 `/token` *路径操作* 中，用 `Depends` 把该类作为依赖项。

```Python hl_lines="4  76"
{!../../docs_src/security/tutorial003.py!}
```

`OAuth2PasswordRequestForm` 是用以下几项内容声明表单请求体的类依赖项：

* `username`
* `password`
* 可选的 `scope` 字段，由多个空格分隔的字符串组成的长字符串

      TestByteSource okSource = new TestByteSource(bytes);
      assertThrows(IOException.class, () -> okSource.copyTo(new TestByteSink(option)));
      // ensure stream was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if sink.newOutputStream() throws).
      assertTrue(
          "stream not closed when copying to sink with option: " + option,

   * hexadecimal number in lower case.
   *
   * <p>Note that if the output is considered to be a single hexadecimal number, whether this string
   * is big-endian or little-endian depends on the byte order of {@link #asBytes}. This may be
   * surprising for implementations of {@code HashCode} that represent the number in big-endian

	CompressedSize64 uint64

	// UncompressedSize64 is the uncompressed size of the file in bytes.
	UncompressedSize64 uint64

	Extra         []byte
	ExternalAttrs uint32 // Meaning depends on CreatorVersion
}

// FileInfo returns an fs.FileInfo for the [FileHeader].
func (h *FileHeader) FileInfo() fs.FileInfo {
	return headerFileInfo{h}
}

// headerFileInfo implements [fs.FileInfo].