+ upgrade.minVersion);
                }
            } else {
                context.warning("Property " + propertyName + " not found in POM properties");
            }
        } else {
            context.warning("No properties section found in POM for property " + propertyName);
        }

        return false;
    }

    /**

		if _, loaded := c.outgoing.LoadOrStore(client.MuxID, client); client.MuxID != 0 && !loaded {
			if debugReqs {
				_, found := c.outgoing.Load(client.MuxID)
				fmt.Println(client.MuxID, c.String(), "Connection.newMuxClient: RELOADED MUX. loaded:", loaded, "found:", found)
			}
			return client, nil
		}
		client.MuxID = atomic.AddUint64(&c.NextID, 1)
	}
}

// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This file encapsulates some of the odd characteristics of the
// Loong64 (LoongArch64) instruction set, to minimize its interaction
// with the core of the assembler.

package arch

import (
	"cmd/internal/obj"
	"cmd/internal/obj/loong64"
	"errors"
	"fmt"
)

	if serverDebugLog {
		fmt.Println(time.Now().Round(time.Millisecond).Format(time.RFC3339), " bootstrap: ", msg)
	}

	noSubs := globalTrace.NumSubscribers(madmin.TraceBootstrap) == 0
	if noSubs {
		return
	}

	globalTrace.Publish(info)
}

func bootstrapTrace(msg string, worker func()) {
	if serverDebugLog {
		fmt.Println(time.Now().Round(time.Millisecond).Format(time.RFC3339), " bootstrap: ", msg)
	}

- 客户端没有执行操作的权限
- 客户端没有访问资源的权限
- 客户端要访问的项目不存在
- 等等 ...

遇到这些情况时，通常要返回 **4XX**（400 至 499）**HTTP 状态码**。

**4XX** 状态码与表示请求成功的 **2XX**（200 至 299） HTTP 状态码类似。

只不过，**4XX** 状态码表示客户端发生的错误。

大家都知道**「404 Not Found」**错误，还有调侃这个错误的笑话吧？

## 使用 `HTTPException`

向客户端返回 HTTP 错误响应，可以使用 `HTTPException`。

### 导入 `HTTPException`

{* ../../docs_src/handling_errors/tutorial001.py hl[1] *}

### 触发 `HTTPException`

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package tar

import (
	"bytes"
	"fmt"
	"strconv"
	"strings"
	"time"
)

// hasNUL reports whether the NUL character exists within s.
func hasNUL(s string) bool {
	return strings.Contains(s, "\x00")
}

// isASCII reports whether the input is an ASCII C-style string.

            return 1;
        }

        if (pomMap.isEmpty()) {
            context.warning("No POM files found in " + startingDirectory);
            return 0;
        }

        context.info("Found " + pomMap.size() + " POM file(s)");

        // Perform the upgrade logic
        int result = doUpgrade(context, targetModel, pomMap);

	formats := make([]*formatErasureV3, 16)

	for j := range 16 {
		newFormat := format.Clone()
		newFormat.Erasure.This = format.Erasure.Sets[0][j]
		formats[j] = newFormat
	}

	// empty format to indicate disk not found, but this
	// empty should return false.
	formats[0] = nil

	if ok := formatErasureV3ThisEmpty(formats); ok {
		t.Fatalf("expected value false, got %t", ok)
	}

	formats[2].Erasure.This = ""

./mc rm sitea/delissue/hello --insecure

count=$(./mc ls --versions sitea/delissue --insecure | wc -l)

if [ ${count} -ne 3 ]; then
	echo "BUG: expected number of versions to be '3' found ${count}"
	echo "===== DEBUG ====="
	./mc ls --versions sitea/delissue
fi

./mc mb sitea/testbucket

./mc version enable sitea/testbucket

./mc put --quiet README.md sitea/testbucket/file

        fun selectVersionsFrom(minimumSupported: String, allVersions: List<String>): List<String> {
            require(minimumSupported in allVersions) {
                "Minimum supported '$minimumSupported' was not found in available versions: $allVersions"
            }
            val versionsByMinor = allVersions
                .groupBy { it.take(3) } // e.g. 1.9
                .toSortedMap()
            val latests = buildList {