使用 Jmeter 的 POST 调用中的多个 Json 有效负载

Question

有一个用于注册用户的 json 有效负载。我在 CSV 文件中给出了文件名，并在正文中给出了 filetostring() 函数。但是api仍然没有发布它。在日志下方给出并使用 Jmeter5.1。有什么建议吗？

${__FileToString(C:/${__eval({regusr})}.txt,,)}

${__FileToString(C:/${({regusr})}.txt,,)}

2019-11-01 22:28:16,112 INFO o.a.j.e.StandardJMeterEngine: Starting
ThreadGroup: 1 : Thread Group 2019-11-01 22:28:16,112 INFO
o.a.j.e.StandardJMeterEngine: Starting 1 threads for group Thread
Group. 2019-11-01 22:28:16,112 INFO o.a.j.e.StandardJMeterEngine:
Thread will continue on error 2019-11-01 22:28:16,112 INFO
o.a.j.t.ThreadGroup: Starting thread group... number=1 threads=1
ramp-up=1 delayedStart=false 2019-11-01 22:28:16,113 INFO
o.a.j.t.ThreadGroup: Started thread group number 1 2019-11-01
22:28:16,113 INFO o.a.j.e.StandardJMeterEngine: All thread groups have
been started 2019-11-01 22:28:16,114 INFO o.a.j.t.JMeterThread: Thread
started: Thread Group 1-1 2019-11-01 22:28:16,114 INFO
o.a.j.s.FileServer: Stored: C:\auth_reg.csv 2019-11-01 22:28:16,301
INFO o.a.j.t.JMeterThread: Thread is done: Thread Group 1-1 2019-11-01
22:28:16,302 INFO o.a.j.t.JMeterThread: Thread finished: Thread Group
1-1 2019-11-01 22:28:16,302 INFO o.a.j.e.StandardJMeterEngine:
Notifying test listeners of end of test 2019-11-01 22:28:16,302 INFO
o.a.j.s.FileServer: Close: C:\auth_reg.csv 2019-11-01 22:28:16,303
INFO o.a.j.g.u.JMeterMenuBar: setRunning(false, *local*)

Answer 1

如果您只想阅读动态文件正文，您可以省略 __eval() function 并使用

${__FileToString(${regusr}.txt,,)}

如果您的 JSON 有效负载文件包含您希望在运行时评估/替换的 JMeter Functions and/or Variables，您应该将上述语句包装到 __eval() 函数中，例如：

${__eval(${__FileToString(${regusr}.txt,,)})}

演示：

更多信息：Here’s What to Do to Combine Multiple JMeter Variables

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另外请注意，使用Directory Listing Config 插件可能比在 CSV 文件中手动指定文件名更容易，目录列表配置插件可以使用JMeter Plugins Manager 安装