性能测试工具JMeter中412（预条件失败）错误的解决方法

从错误响应来看，核心问题是请求携带的X-Metadata-Hash和X-Userpref-Hash与服务器端哈希值不匹配，以下是针对性解决步骤：

1. 修正哈希值的关联逻辑 #

• 注意响应返回的字段是user_hash，但请求头需要的是X-Userpref-Hash，别搞混映射关系
• 用JMeter的JSON Extractor从响应中提取正确值：
  • 提取metadata_hash：JSON路径写$.metadata_hash，变量名设为metadata_hash
  • 提取user_hash：JSON路径写$.user_hash，变量名设为user_hash
• 确保后续Filter请求的请求头中，X-Metadata-Hash引用${metadata_hash}，X-Userpref-Hash引用${user_hash}，禁止硬编码固定值

2. 走完整的元数据同步流程 #

SugarCRM要求客户端先同步元数据再发起业务请求，建议按正常流程执行：

1. 先调用/rest/v11_22/metadata接口获取最新元数据及哈希值
2. 从该接口响应中提取metadata_hash和user_hash
3. 再发起Filter请求，携带上述提取的哈希值

3. 验证会话与Cookie的一致性 #

• 测试计划中必须添加HTTP Cookie管理器，确保所有请求共享同一个会话Cookie（包括PHPSESSID和download_token_base）
• 多线程性能测试场景下，每个线程需独立完成登录、元数据同步、业务请求流程，不能共享线程间的哈希和Cookie变量

4. 检查哈希值的完整性 #

• 添加Debug Sampler查看提取的变量值，对比服务器返回的metadata_hash（46ce488ee8c453af4c2afb362a256ad4）和user_hash（bcf104cc74fa1e8e01ac8c5750c38a05），确保完全一致，无截断或大小写错误

问题中的请求与响应详情 #

请求信息 #

GET https://sandbox-arrowxl.sugaropencloud.uk/rest/v11_22/Filters?erased_fields=true&max_num=20&filter%5B0%5D%5Bcreated_by%5D=459b76fc-1adc-41b6-b606-2f868093b7da&filter%5B1%5D%5Bmodule_name%5D=PR_Orders

Cookie: PHPSESSID=0sjoslbg4mc2on257jrfb9lbs8; download_token_base=TGduwIPh4cvBsABi1dQGqYBRcDCwPMt9kcxpQ0WDuMJ5KCVZXTQAYsGeGl5lpXnu4gcsknjmbRVjMWE5lD6XzgWra_zlhWB1xP1M3_T4tJYdFEoRaP6VYYhoZyjYNVJ_2pmjfNeNmIHgPt13XScCdqVZc1ikqqupLizT9xw

请求头:
Connection: keep-alive
Sec-Fetch-Mode: cors
X-Userpref-Hash: 040bb333d34e449dc43435d03e11dded
Referer: https://sandbox-arrowxl.sugaropencloud.uk/
Sec-Fetch-Site: same-origin
Accept-Language: en-US,en;q=0.5
X-Metadata-Hash: 982fcdfebdc59c11bce211ebfd6f73d6
Accept: application/json, text/javascript, */*; q=0.01
OAuth-Token: TGduwIPh4cvBsABi1dQGqYBRcDCwPMt9kcxpQ0WDuMJ5KCVZXTQAYsGeGl5lpXnu4gcsknjmbRVjMWE5lD6XzgWra_zlhWB1xP1M3_T4tJYdFEoRaP6VYYhoZyjYNVJ_2pmjfNeNmIHgPt13XScCdqVZc1ikqqupLizT9xw
X-Requested-With: XMLHttpRequest
Content-Type: application/json
Accept-Encoding: gzip, deflate, br
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0
Sec-Fetch-Dest: empty
Host: sandbox-arrowxl.sugaropencloud.uk

响应信息 #

HTTP/1.1 412 Precondition Failed
Date: Tue, 23 Jan 2024 09:38:06 GMT
Content-Type: application/json
Content-Length: 230
Connection: keep-alive
Server: Apache
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=31536000; includeSubdomains
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store
Pragma: no-cache
Status: 412 Precondition Failed
X-Application-Server: cloneuk01-web-1

响应体:
{"error":"metadata_out_of_date","metadata_hash":"46ce488ee8c453af4c2afb362a256ad4","user_hash":"bcf104cc74fa1e8e01ac8c5750c38a05","error_message":"Your metadata or user hash did not match the server. Please resync your metadata."}

内容的提问来源于stack exchange，提问作者syeda ayesha