我在JMeter中有一个HTTP请求采样器，用于发送登录请求。

我必须access_token从此HTTP请求的响应中获取，该响应必须与第二个HTTP请求
采样器的请求标头一起发送。

登录请求的响应数据如下所示：

{“status”:true,”access_token”:”91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.Arvdm_M68-BoDFRURArvdmwYgWV9Nr2sHYDwivTM”}

Regular Expression Extractor

Reference Name: access_token
Regular expression: access_token":"(.*?)"
Template $1$
MatchNo:1

When I am checking this regular expression using View Results Tree- >RegExp
Test
, I am obtaining a result like this:

Match count: 1

Match[1][0]=
access_token”:”91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.Arvdm_M68-BoDFRURArvdmwYgWV9Nr2sHYDwivTM”

Match[1][1]=
91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.Arvdm_M68-BoDFRURArvdmwYgWV9Nr2sHYDwivTM

我需要获取Match [1] [1]。即只是access_token价值。

在 第二个HTTP请求采样器的HTTP标头管理器中引用表达式的值：

Name: Authorization
Value : Bearer ${access_token}

现在，当我运行JMeter测试并观察View Results Tree时，我可以看到第二个请求的响应是

Global Authentication Failed

and the Request Headers:

Connection: keep-alive

problem is in the following line: I have to get the access_token value
(91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.91kLM68tdMBoDFRURArvdmwYgWV9Nr2sHYDwivTM.Arvdm_M68-BoDFRURArvdmwYgWV9Nr2sHYDwivTM)
instead of ${access_token}:

Authorization: Bearer ${access_token}

Content-Type: application/json

Content-Length: 21

Host: localhost

User-Agent: Apache-HttpClient/4.5.3 (Java/1.8.0_111)

如果不是给参考令牌，而是在HTTPHeader Manager中对令牌进行硬编码，则响应成功。

我该如何解决这个问题？