记一次 RestTemplate 请求失败问题的排查 → RestTemplate 默认会对特殊字符进行转义

开心一刻

今天中午，侄子在沙发上玩手机，他妹妹屁颠屁颠的跑到他面前

小侄女：哥哥，给我一块钱

侄子：叫妈给你

小侄女朝着侄子，毫不犹豫的叫到：妈！

侄子：不是，叫妈妈给你

小侄女继续朝他叫到：妈妈

侄子受不了，从兜里掏出一块钱说道：我就只有这一块钱了，拿去拿去

小侄女最后还不忘感谢到：谢谢妈妈！

侄子彻底奔溃了，我在一旁笑出了鹅叫声

需求背景

需求很简单，就是以 HTTP 的方式下载 OSS 上的文件，类似如下

分两步

1、获取文件的下载地址（ HTTP 地址）

2、根据下载地址下载文件

第 1 步不是本文的重点，略过，我们只需要实现第 2 步，是不是很简单？

问题复现

目前，系统跟其他系统的 HTTP 对接都是用的 RestTemplate

那毫无疑问，也用 RestTemplate 来下载 OSS 文件

测试代码非常简单，如下

复制代码

package com.qsl;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @description: RestTemplate 测试
 * @author: 博客园@青石路
 * @date: 2023/11/26 15:31
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class RestTemplateTest {

    @Resource
    private RestTemplate restTemplate;

    @Test
    public void testOss() {
        String ossUrl = "https://qsl-yzb-test.oss-cn-wuhan-lr.aliyuncs.com/company_compare_t.sql?Expires=1700987277&OSSAccessKeyId=TMP.3Kf7vKYWL9RHkroENy7hUyrqAhHBC8YpBCnqXAstCyH3K1j6fkZujtL47V1mFkG5e5hmnLD2dVn4ZJGeD2yDh3GAAQc1k8&Signature=O2qiPYvfZyPmeouwzkXcNqC4Oy0%3D";
        ResponseEntity<byte[]> responseEntity = restTemplate.getForEntity(ossUrl, byte[].class);
        System.out.println(responseEntity.getStatusCode());
    }
}

View Code

我们看下执行结果，发现报异常了

复制代码

org.springframework.web.client.HttpClientErrorException$Forbidden: 403 Forbidden: [<?xml version="1.0" encoding="UTF-8"?>
<Error>
  <Code>AccessDenied</Code>
  <Message>Request has expired.</Message>
  <RequestId>65630E3B05EC713334EDD93D</RequestId>
  <HostId>qsl-yzb-test.oss-cn-wuh... (443 bytes)]

    at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:109)
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:170)
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:112)
    at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
    at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:785)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:743)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:677)
    at org.springframework.web.client.RestTemplate.getForEntity(RestTemplate.java:345)
    at com.qsl.RestTemplateTest.testOss(RestTemplateTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)