feat: support api layer and global headers for testcase

internal/boomer/boomer.go

@@ -16,6 +16,9 @@ type Boomer struct {
 
 	memoryProfile         string
 	memoryProfileDuration time.Duration
+
+	disableKeepalive   bool
+	disableCompression bool
 }
 
 // NewStandaloneBoomer returns a new Boomer, which can run without master.
@@ -52,6 +55,24 @@ func (b *Boomer) SetRateLimiter(maxRPS int64, requestIncreaseRate string) {
 	}
 }
 
+// SetDisableKeepAlive disable keep-alive for tcp
+func (b *Boomer) SetDisableKeepAlive(disableKeepalive bool) {
+	b.disableKeepalive = disableKeepalive
+}
+
+// SetDisableCompression disable compression to prevent the Transport from requesting compression with an "Accept-Encoding: gzip"
+func (b *Boomer) SetDisableCompression(disableCompression bool) {
+	b.disableCompression = disableCompression
+}
+
+func (b *Boomer) GetDisableKeepAlive() bool {
+	return b.disableKeepalive
+}
+
+func (b *Boomer) GetDisableCompression() bool {
+	return b.disableCompression
+}
+
 // SetLoopCount set loop count for test.
 func (b *Boomer) SetLoopCount(loopCount int64) {
 	b.localRunner.loop = &Loop{loopCount: loopCount}