Question

我想从Angular客户端发出POST请求。我有这个Spring端点：

    @RestController()
public class HomeController {

  @PostMapping(value = "/payment/{unique_transaction_id}", consumes = { MediaType.APPLICATION_JSON_VALUE }, produces = { MediaType.APPLICATION_JSON_VALUE })
  public ResponseEntity<WpfResponse> handleWpfMessage(@PathVariable("unique_transaction_id") String unique_transaction_id,
      @RequestBody WpfPaymentsDTO transaction, HttpServletRequest request) throws Exception {

    /// ....        
    return ResponseEntity.ok("http://some_domain.com/example");
  }
}

我使用以下打字稿代码：

save(main: MainForm, hash: string): void {
    this.http.post('http://localhost:8080/some_package/payment/ckjzqtyxh5pnavbjecujhuvzaa5q8n74', main, { headers }).subscribe();
  }

但是当我发出POST请求时，我得到了：

    HttpErrorResponse {headers: HttpHeaders, status: 200, statusText: "OK", url: "http://localhost:8080/some_package/payment/ckjzqtyxh5pnavbjecujhuvzaa5q8n74", ok: false, …}

"SyntaxError: Unexpected token h in JSON at position 0
    at JSON.parse (<anonymous>)
    at XMLHttpRequest.onLoad (http://localhost:4200/vendor.js:13388:51)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost:4200/polyfills.js:2781:31)
    at Object.onInvokeTask (http://localhost:4200/vendor.js:54479:33)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost:4200/polyfills.js:2780:60)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (http://localhost:4200/polyfills.js:2553:47)
    at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (http://localhost:4200/polyfills.js:2856:34)
    at invokeTask (http://localhost:4200/polyfills.js:4102:14)
    at XMLHttpRequest.globalZoneAwareCallback (http://localhost:4200/polyfills.js:4139:21)"

我的状态为OK，但找不到为什么我收到此错误消息。你知道我该怎么解决吗？

Answer 1

我没有任何线索，但是从您的代码看来，您返回的是JSON，但是返回值为字符串"http://some_domain.com/example"，而不是JSON。

Answer 2

您需要在标题中包含{responseType：'text'}。即

  const headers = {
        responseType: 'text'
  }

  this.http.post('http://localhost:8080/some_package/payment/ckjzqtyxh5pnavbjecujhuvzaa5q8n74', main, { headers }).subscribe();

最新答案，但将来可以帮助其他人。

“ SyntaxError：JSON中位置0处的意外令牌h

2 个答案: