In these cases, you would normally return an **HTTP status code** in the range of **400** (from 400 to 499).

This is similar to the 200 HTTP status codes (from 200 to 299). Those "200" status codes mean that somehow there was a "success" in the request.

The status codes in the 400 range mean that there was an error from the client.

Remember all those **"404 Not Found"** errors (and jokes)?

## Use `HTTPException` { #use-httpexception }

					r: r,
				}
				n, err := xioutil.Copy(xioutil.Discard, &fbr)
				r.Close()
				if err == nil {
					response := time.Since(t)
					ttfb := time.Since(*fbr.t)
					// Only capture success criteria - do not
					// have to capture failed reads, truncated
					// reads etc.
					atomic.AddUint64(&totalBytesRead, uint64(n))
					mu.Lock()
					downloadTimes = append(downloadTimes, response)

// It returns the client provided key on success.
func ParseSSECustomerRequest(r *http.Request) (key []byte, err error) {
	return ParseSSECustomerHeader(r.Header)
}

// ParseSSECustomerHeader parses the SSE-C header fields and returns
// the client provided key on success.
func ParseSSECustomerHeader(header http.Header) (key []byte, err error) {

          "interval": "1m",
          "intervalFactor": 2,
          "legendFormat": "KMS Request Success [{{server}}]",
          "refId": "A"
        }
      ],
      "title": "KMS Request Success Rate ",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },

		}
		if header.Typeflag != TypeReg {
			t.Fatalf("Typeflag should've been %d, found %d", TypeReg, header.Typeflag)
		}
	}
}

// failOnceWriter fails exactly once and then always reports success.
type failOnceWriter bool

func (w *failOnceWriter) Write(b []byte) (int, error) {
	if !*w {
		return 0, io.ErrShortWrite
	}
	*w = true
	return len(b), nil
}

    public static final String MAVEN_STYLE_WARNING_NAME = "warning";
    public static final String MAVEN_STYLE_ERROR_NAME = "error";
    public static final String MAVEN_STYLE_SUCCESS_NAME = "success";
    public static final String MAVEN_STYLE_FAILURE_NAME = "failure";
    public static final String MAVEN_STYLE_STRONG_NAME = "strong";
    public static final String MAVEN_STYLE_MOJO_NAME = "mojo";

                    }

                    if (hasUpgrades) {
                        modifiedPoms.add(pomPath);
                        context.success("Plugin upgrades applied");
                    } else {
                        context.success("No plugin upgrades needed");
                    }
                } catch (Exception e) {
                    context.failure("Failed to upgrade plugins: " + e.getMessage());

        SMBSigningDigest dg = mock(SMBSigningDigest.class);
        transport.setDigest(dg);
        assertSame(dg, transport.getDigest());
    }

    @Test
    @DisplayName("Context accessor returns constructor-provided context")
    void contextAccessor() {
        assertSame(ctx, transport.getContext());
    }

    @Test
    @DisplayName("acquire returns same instance")

        acquireSharedInterruptibly(-1);
        return getValue();
      }

      /**
       * Implementation of the actual value retrieval. Will return the value on success, an
       * exception on failure, a cancellation on cancellation, or an illegal state if the
       * synchronizer is in an invalid state.
       */

    @DisplayName("verifyMIC delegates to GSS and succeeds")
    void verifyMIC_success() throws Exception {
        byte[] data = new byte[] { 1, 2 };
        byte[] mic = new byte[] { 3 };
        // No exception means success
        doNothing().when(gssContext).verifyMIC(eq(mic), eq(0), eq(1), eq(data), eq(0), eq(2), any());

        assertDoesNotThrow(() -> ctx.verifyMIC(data, mic));