我如何将请求标头传播到Springboot 2中的响应标头

Question

我有Swagger Codegen生成的接口。看起来像这样：

@PostMapping(value = "/ipc/conf", produces = {"application/json", "application/problem+json"}, consumes = {
            "application/json"})
default ResponseEntity<CustomResponseEntity> ipcConfPost(
            @ApiParam(value = "ID", required = true) @RequestHeader(value = "X-Request-ID", required = true) String xRequestID,
            @ApiParam(value = "Value for identifying a single transaction across multiple services up to the backend.", required = true) @RequestHeader(value = "X-Correlation-ID", required = true) String xCorrelationID,
            @ApiParam(value = "The payload to transmit", required = true) @Valid @RequestBody IPcData ipcConfData,
            @ApiParam(value = "The business context is a general classification for a larger number of requests.") @RequestHeader(value = "X-Business-Context", required = false) String xBusinessContext) {
        getRequest().ifPresent(request -> {
            for (MediaType mediaType : MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                    String exampleString = "{ \"id\" : \"id\", \"error\" : \"error\" }";
                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
                    break;
                }
            }
        });
        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
    }

在实施中，我想拥有一个请求标题的完整列表（我需要其中一些在响应中），或者能够获得API中未列出的标头的值。问题是我不能更改端点的签名，因为它将在进一步的版本中引起重大头痛。 那么有什么方法可以实现这一目标吗？

Answer 1

您已经在代码中拥有请求对象，因此您可以从中获取标题。 IE request.getheadernames（）然后循环通过它们。

之后，您可以将它们添加到响应中

HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.set("key", "value");
ResponseEntity.ok().headers(responseHeaders).body("some body");