liubao68 commented on issue #1462: how to generate a pic verify code for the web portal ? URL: https://github.com/apache/servicecomb-java-chassis/issues/1462#issuecomment-566399571 Maybe you can use following: 1. byte[] as the return value; 2. File or Inputstream, this API is something like file downloading. see [download](https://docs.servicecomb.io/java-chassis/zh_CN/general-development/file-download.html) and [examples](https://github.com/apache/servicecomb-java-chassis/blob/master/integration-tests/it-producer/src/main/java/org/apache/servicecomb/it/schema/DownloadSchema.java)
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