[The modification of header file information of http response does not take effect] ctx.Header().Set("Content-Type", "application/octet-stream") about kratos HOT 5 CLOSED

Based on the code you've shared, it seems like you're trying to set the Content-Type header to "application/octet-stream" in the _Lsmdb_Get0_HTTP_Handler function. However, the Content-Type header is not being set as expected and is instead returning as "application/json".

This could be due to the fact that the Content-Type header is being set after the response has already been written. In Go, once the header is written, any subsequent changes to the header will not be reflected in the response. This is why it's important to set the header before writing the response.

Here's how you can modify your function to set the Content-Type header before writing the response:

func _Lsmdb_Get0_HTTP_Handler(srv LsmdbHTTPServer) func(ctx http.Context) error {
	return func(ctx http.Context) error {
		var in GetRequest
		if err := ctx.BindQuery(&in); err != nil {
			return err
		}
		if err := ctx.BindVars(&in); err != nil {
			return err
		}
		http.SetOperation(ctx, OperationLsmdbGet)
		h := ctx.Middleware(func(ctx context.Context, req interface{}) (interface{}, error) {
			return srv.Get(ctx, req.(*GetRequest))
		})
		out, err := h(ctx, &in)
		if err != nil {
			return err
		}
		reply := out.(*GetReply)
		ctx.Response().Header().Set("Content-Type", "application/octet-stream")
		return ctx.Result(200, reply.Value)
	}
}

In the above code, ctx.Response().Header().Set("Content-Type", "application/octet-stream") is used to set the Content-Type header before writing the response.

This solution is based on a similar issue found in the Kratos repository: [Question]设置的Header不生效. The issue was resolved by setting the header on the response object directly.

Please try this solution and let me know if it works for you. If you're still facing issues, it would be helpful to know more about any middleware or filters that might be affecting the response.

Sources

• [Question]设置的Header不生效
• transport/http/server.go
• transport/http/client.go

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嘿，@Tsan1024！我们又见面了！很高兴再次看到你的提问。别担心，我正在查看你的问题，很快就会给你一个完整的答案。

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Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

Hey @Tsan1024! We meet again! Nice to see your question again. Don't worry, I'm looking at your question and will give you a complete answer soon.

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依旧没有生效， 返回的依然是application/json

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Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

It still doesn’t take effect, and what is returned is still application/json.

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