/// check | Periksa

Dengan deklarasi tipe data Python, **FastAPI** melakukan validasi data.

Perhatikan kesalahan tersebut juga menjelaskan validasi apa yang tidak sesuai.

Validasi ini sangat membantu ketika mengembangkan dan men-*debug* kode yang berhubungan dengan API anda.

///

## Dokumentasi

        // Test excessive maxTransactSize (> 16MB)
        SMBUtil.writeInt4(20 * 1024 * 1024, buffer, 28); // 20MB
        SMBUtil.writeInt4(1024 * 1024, buffer, 32); // 1MB read size - valid
        SMBUtil.writeInt4(1024 * 1024, buffer, 36); // 1MB write size - valid

        SMBProtocolDecodingException exception = assertThrows(SMBProtocolDecodingException.class, () -> {
            response.readBytesWireFormat(buffer, 0);
        });

    @CsvSource({ "50, 0, 100, true", "0, 0, 100, true", "100, 0, 100, true", "-1, 0, 100, false", "101, 0, 100, false" })
    void testRangeValidation(long value, long min, long max, boolean valid) {
        if (valid) {
            assertDoesNotThrow(() -> InputValidator.validateRange(value, min, max, "test"));
        } else {

            // Test 3: Tampered data with valid signature format should return false
            System.arraycopy(validSig, 0, data, SIGNATURE_OFFSET, SIGNATURE_LENGTH);
            data[20] ^= 0xFF; // Tamper with data

            boolean tamperedResult = digest.verify(data, 0, data.length, 0, msg);
            assertFalse(tamperedResult, "Tampered data MUST return false even with valid signature format");
        }

        @Test

}

func getAndValidateAttributesOpts(ctx context.Context, w http.ResponseWriter, r *http.Request, bucket, object string) (opts ObjectOptions, valid bool) {
	var argumentName string
	var argumentValue string
	var apiErr APIError
	var err error
	valid = true

	defer func() {
		if valid {
			return
		}

		errResp := objectAttributesErrorResponse{
			ArgumentName:  &argumentName,
			ArgumentValue: &argumentValue,

The same would happen if you had something like a <abbr title='A union between multiple types means "any of these types".'>union</abbr> between different types where one or more of them are not valid Pydantic types, for example this would fail 💥:

            }
        }
        if (rpc == null) {
            return false;
        }

        boolean valid = false;
        for (final int hash : rpc.getHashAlgos()) {
            if (hash == pc.getHashAlgos()[0]) {
                valid = true;
            }
        }
        if (!valid) {
            log.error("Server returned invalid hash selection");
            return false;
        }

///

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters
* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value { #alternative-old-query-as-the-default-value }

        // Then - Buffer should be valid
        assertNotNull(buffer2, "Reused buffer should not be null");
        assertEquals(SmbComTransaction.TRANSACTION_BUF_SIZE, buffer2.length, "Reused buffer should have correct size");

        // Note: We don't check if content is cleared as that's not a security requirement
        // The important part is that the buffer is valid and has correct size
    }

    /**

        // Invalid regex pattern should be handled gracefully
        urlFilter.addInclude(".*[invalid");
        urlFilter.addInclude("https://valid.com/.*");

        // Valid pattern should still work
        assertTrue(urlFilter.match("https://valid.com/page"));
    }

    /**
     * Test adding a single exclude pattern
     */
    public void test_addExclude_singlePattern() {