Add automatic retries and exponential backoff to Filebeat httpjson in…

…put (#18956)

- Add automatic retries and exponential backoff to Filebeat httpjson input (#18956)
- Add test cases
- Support the new OAuth2 functionality

CHANGELOG.next.asciidoc

@@ -410,6 +410,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Add support for v1 consumer API in Cloud Foundry input, use it by default. {pull}19125[19125]
 - Explicitly set ECS version in all Filebeat modules. {pull}19198[19198]
 - Add new mode to multiline reader to aggregate constant number of lines {pull}18352[18352]
+- Add automatic retries and exponential backoff to httpjson input. {pull}18956[18956]
 
 *Heartbeat*
 

go.mod

@@ -99,6 +99,7 @@ require (
 	github.com/grpc-ecosystem/grpc-gateway v1.13.0 // indirect
 	github.com/h2non/filetype v1.0.12
 	github.com/hashicorp/go-multierror v1.1.0
+	github.com/hashicorp/go-retryablehttp v0.6.6
 	github.com/hashicorp/golang-lru v0.5.2-0.20190520140433-59383c442f7d // indirect
 	github.com/insomniacslk/dhcp v0.0.0-20180716145214-633285ba52b2
 	github.com/jmoiron/sqlx v1.2.1-0.20190826204134-d7d95172beb5

go.sum

@@ -406,9 +406,15 @@ github.com/hashicorp/errwrap v0.0.0-20141028054710-7554cd9344ce h1:prjrVgOk2Yg6w
 github.com/hashicorp/errwrap v0.0.0-20141028054710-7554cd9344ce/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
+github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
+github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
+github.com/hashicorp/go-hclog v0.9.2 h1:CG6TE5H9/JXsFWJCfoIVpKFIkFe6ysEuHirp4DxCsHI=
+github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
 github.com/hashicorp/go-multierror v0.0.0-20161216184304-ed905158d874/go.mod h1:JMRHfdO9jKNzS/+BTlxCjKNQHg/jZAft8U7LloJvN7I=
 github.com/hashicorp/go-multierror v1.1.0 h1:B9UzwGQJehnUY1yNrnwREHc3fGbC2xefo8g4TbElacI=
 github.com/hashicorp/go-multierror v1.1.0/go.mod h1:spPvp8C1qA32ftKqdAHm4hHTbPw+vmowP0z+KUhOZdA=
+github.com/hashicorp/go-retryablehttp v0.6.6 h1:HJunrbHTDDbBb/ay4kxa1n+dLmttUlnP3V9oNE4hmsM=
+github.com/hashicorp/go-retryablehttp v0.6.6/go.mod h1:vAew36LZh98gCBJNLH42IQ1ER/9wtLZZ8meHqQvEYWY=
 github.com/hashicorp/go-uuid v1.0.2 h1:cfejS+Tpcp13yd5nYHWDI6qVCny6wyX2Mt5SGur2IGE=
 github.com/hashicorp/go-uuid v1.0.2/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/go-version v1.0.0 h1:21MVWPKDphxa7ineQQTrCU5brh7OuVVAzGOCnnCPtE8=