我有一个奇怪的情况。我想application/json; charset=utf-8从 http 处理程序返回内容类型。func handleTest() http.HandlerFunc { return func(w http.ResponseWriter, r *http.Request) { if r.Header.Get("Accept") != "application/json" { w.WriteHeader(http.StatusNotAcceptable) return } w.WriteHeader(http.StatusOK) w.Header().Set("Content-Type", "application/json; charset=utf-8") json.NewEncoder(w).Encode(map[string]string{"foo": "bar"}) }}当我在单元测试中检查这一点时,它是正确的。这个测试没有失败。func TestTestHandler(t *testing.T) { request, _ := http.NewRequest(http.MethodGet, "/test", nil) request.Header.Set("Accept", "application/json") response := httptest.NewRecorder() handleTest().ServeHTTP(response, request) contentType := response.Header().Get("Content-Type") if contentType != "application/json; charset=utf-8" { t.Errorf("Expected Content-Type to be application/json; charset=utf-8, got %s", contentType) return }}但是当我尝试使用 curl (和其他客户端)时,它会显示为text/plain; charset=utf-8.$ curl -H 'Accept: application/json' localhost:8080/test -v* Trying 127.0.0.1:8080...* TCP_NODELAY set* Connected to localhost (127.0.0.1) port 8080 (#0)> GET /test HTTP/1.1> Host: localhost:8080> User-Agent: curl/7.68.0> Accept: application/json> * Mark bundle as not supporting multiuse< HTTP/1.1 200 OK< Date: Tue, 28 Dec 2021 13:02:27 GMT< Content-Length: 14< Content-Type: text/plain; charset=utf-8< {"foo":"bar"}* Connection #0 to host localhost left intact我用 curl、insomnia 和 python 试过这个。在所有 3 种情况下,内容类型都是text/plain; charset=utf-8.是什么导致了这个问题,我该如何解决?
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