私は次の方法でプロジェクトを生成しました：
mvn archetype:generate -DarchetypeGroupId=com.sap.cloud.s4hana.archetypes -DarchetypeArtifactId=scp-cf-spring -DarchetypeVersion=LATEST
S4Sdk jar と S4Hana V2 API へのアクセスを含めました。コードは基本認証で正常に動作しますが、宛先タイプを「OAuth2SAMLBEARER ASSERTION」として構成すると、.execute 呼び出しを介して S4Hana API にアクセスすると、CF ログに次のエラーが表示されます。:
2018-09-07T06:37:22.728+0000 [APP/PROC/WEB/0] ERR ... 1 more
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR Caused by: com.sap.cloud.sdk.cloudplatform.connectivity.exception.DestinationAccessException: Failed to get access token for destination service.
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.sap.cloud.sdk.cloudplatform.connectivity.DestinationServiceCommand.getAccessToken(DestinationServiceCommand.java:107)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.sap.cloud.sdk.cloudplatform.connectivity.DestinationServiceCommand.run(DestinationServiceCommand.java:117)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.sap.cloud.sdk.cloudplatform.connectivity.DestinationServiceCommand.run(DestinationServiceCommand.java:26)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR ... 26 more
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR Caused by: com.sap.cloud.sdk.cloudplatform.connectivity.TokenRequestFailedException: Failed to get access token: no valid JWT bearer found in "Authorization" header of request.
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.sap.cloud.sdk.cloudplatform.connectivity.TokenRequest.getCurrentJwt(TokenRequest.java:307)
2018-09-07T06:37:22.729+0000 [APP/PROC/WEB/0] ERR at com.sap.cloud.sdk.cloudplatform.connectivity.TokenRequest.requestTokenWithUserTokenGrant(TokenRequest.java:348)
S4Hana システムとサブアカウントの間に信頼を確立したことに注意してください。通信ユーザーとビジネス ユーザーが構成されており、プリンシパルの伝播手順はhttps://blogs.sap.com/2018/02/05/deep-dive-8-with-で指定されています。 sap-s4hana-cloud-sdk-leverage-principal-propagation-via-oauth-2-when-using-a-business-api-from-s4hana-cloud/、
このために何か他の設定が必要かどうかを確認し、お知らせください。
コメントで提案されたブログを介して approuter を作成しようとしましたが、cf で approuter をデプロイする際にエラーが発生します:
2018-09-07T20:01:21.20+0530 [APP/PROC/WEB/0] OUT > @sap/approuter@2.10.0 start /home/vcap/app
2018-09-07T20:01:21.20+0530 [APP/PROC/WEB/0] OUT > node approuter.js
2018-09-07T20:01:25.50+0530 [APP/PROC/WEB/0] OUT #2.0#2018 09 07 14:31:25:497#+00:00#WARNING#/LoggingLibrary################PLAIN##Dynamic log level switching not available#
2018-09-07T20:01:28.89+0530 [APP/PROC/WEB/0] OUT #2.0#2018 09 07 14:31:28:897#+00:00#INFO#/approuter################PLAIN##Application router version 2.10.0#
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR /home/vcap/app/lib/utils/JsonValidator.js:30
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR throw new VError('%s%s: %s',
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR ^
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR VError: environment-destinations/0/url: Format validation failed (URI must be absolute)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at JsonValidator.validate (/home/vcap/app/lib/utils/JsonValidator.js:30:11)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Object.validateEnvDestinations (/home/vcap/app/lib/configuration/validators.js:100:15)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at loadDestinations (/home/vcap/app/lib/configuration/env-config.js:55:14)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Object.load (/home/vcap/app/lib/configuration/env-config.js:20:28)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Object.module.exports.load (/home/vcap/app/lib/configuration.js:15:37)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at bootstrap (/home/vcap/app/lib/bootstrap.js:47:36)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Approuter.start (/home/vcap/app/approuter.js:58:13)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Object.<anonymous> (/home/vcap/app/approuter.js:115:6)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Module._compile (module.js:577:32)
2018-09-07T20:01:29.00+0530 [APP/PROC/WEB/0] ERR at Object.Module._extensions..js (module.js:586:10)
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! Linux 4.4.0-133-generic
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! argv "/home/vcap/deps/0/node/bin/node" "/home/vcap/deps/0/bin/npm" "start"
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! node v6.14.3
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! npm v3.10.10
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! code ELIFECYCLE
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! @sap/approuter@2.10.0 start: `node approuter.js`
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! Exit status 1
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR!
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! Failed at the @sap/approuter@2.10.0 start script 'node approuter.js'.
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! Make sure you have the latest version of node.js and npm installed.
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! If you do, this is most likely a problem with the @sap/approuter package,
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! not with npm itself.
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! Tell the author that this fails on your system:
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! node approuter.js
2018-09-07T20:01:29.19+0530 [APP/PROC/WEB/0] ERR npm ERR! You can get information on how to open an issue for this project with:
2018-09-07T20:01:29.20+0530 [APP/PROC/WEB/0] ERR npm ERR! npm bugs @sap/approuter
2018-09-07T20:01:29.20+0530 [APP/PROC/WEB/0] ERR npm ERR! Or if that isn't available, you can get their info via:
2018-09-07T20:01:29.20+0530 [APP/PROC/WEB/0] ERR npm ERR! npm owner ls @sap/approuter
2018-09-07T20:01:29.20+0530 [APP/PROC/WEB/0] ERR npm ERR! There is likely additional logging output above.
2018-09-07T20:01:29.29+0530 [APP/PROC/WEB/0] ERR npm ERR! Please include the following file with any support request:
2018-09-07T20:01:29.29+0530 [APP/PROC/WEB/0] ERR npm ERR! /home/vcap/app/npm-debug.log
ここで私を助けてくれませんか。ブログで提案されているリンクから approuter をダウンロードしました。