如何自定义“主机" Java http客户端中的标头 [英] How to customise "host" header in Java http client
问题描述
这是我的代码:
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://127.0.0.1:8081/"))
.header("Host", "test.example.com")
.build();
client.send(request, HttpResponse.BodyHandlers.ofString());
结果,我看到上面的代码发送:
As a result I see that the above code sends:
GET / HTTP/1.1
Connection: Upgrade, HTTP2-Settings
Content-Length: 0
Host: 127.0.0.1:8081
HTTP2-Settings: AAEAAEAAAAIAAAABAAMAAABkAAQBAAAAAAUAAEAA
Upgrade: h2c
User-Agent: Java-http-client/10
Host: test.example.com
您可以看到它发送了两个Host
标头(一个来自URI,另一个是我指定的),但是我希望它发送我指定的Host
标头,而不是发送来自URI的一个.
这个客户可以吗?
As you can see it sends two Host
headers (the one from URI and the one I specified), but I would like it to send the Host
header that I specified, not the one from the URI.
Is it possible with this client?
在Java 11中,情况甚至更糟(您需要将client.send行更改为:client.send(request, HttpResponse.BodyHandlers.ofString());
):
In Java 11, it gets even worse (you need to change the client.send line to: client.send(request, HttpResponse.BodyHandlers.ofString());
):
java.lang.IllegalArgumentException: restricted header name: "Host"
如何自定义标头(测试虚拟主机所需)?
How can I customize that header (needed for testing of virtual hosts)?
我也尝试过setHeader
并得到完全相同的问题(双Host
标头或异常).
I also tried the setHeader
and get exactly the same problem (either double Host
headers, or the exception).
我报告了一个 JDK错误.
推荐答案
从Java 12(EA内部版本22)开始,它已由其他属性jdk.httpclient.allowRestrictedHeaders
解决(请参见
As of Java 12 (EA build 22) it has been solved by additional property jdk.httpclient.allowRestrictedHeaders
(see https://bugs.openjdk.java.net/browse/JDK-8213696).
因此,现在可以通过执行以下代码来覆盖Host
(或任何其他受限制的标头):
java -Djdk.httpclient.allowRestrictedHeaders=host ...
So now one can override Host
(or any other restricted header) by executing the code with:
java -Djdk.httpclient.allowRestrictedHeaders=host ...
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