used for dify to access ctyun api, change stream to false from true

./httproxy -listen :8081 -target https://wishub-x1.ctyun.cn -req-body ""stream":?true::"stream": false" -resp-body ""message"::"delta""

or rewrite streaming response

./httproxy -listen :8080 -target https://wishub-x1.ctyun.cn -resp-body "data:{::data: {"

or insert response header

./httproxy -listen :8080 -target https://wishub-x1.ctyun.cn -resp-header 'NewHeader::*::$$DATETIME$$'

vars: $$DATETIME$$, $$TIME$$, $$DATE$$, $$YEAR$$, $$MONTH$$, $$DAY$$, $$HOUR$$, $$MINUTE$$, $$SECOND$$, $$REQUESTS$$, $$STARTTIME$$, $$RUNNINGTIME$$, $$ClientIP$$, $$CURRENTCONNS$$