java maxHttpHeaderSize
时间: 2023-10-18 15:05:08 浏览: 26
`maxHttpHeaderSize`是一个Java中的HTTP客户端和服务器的选项,用于指定HTTP请求或响应头的最大字节数。这个选项可以用于防止缓冲区溢出攻击。
在Java中,您可以使用`HttpServer`类来创建一个HTTP服务器,并在其中设置`maxHttpHeaderSize`选项来限制请求头的大小。例如:
```
HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
server.setExecutor(null);
server.createContext("/", new MyHandler());
server.setExecutor(null);
server.setHttpHandler(new HttpHandler() {
@Override
public void handle(HttpExchange exchange) throws IOException {
exchange.getResponseHeaders().add("Content-Type", "text/plain");
exchange.sendResponseHeaders(200, 0);
OutputStream os = exchange.getResponseBody();
os.write("Hello World".getBytes());
os.close();
}
});
server.setOption("maxHttpHeaderSize", 8192); // 设置最大请求头字节数为8192
server.start();
```
同样,您也可以在Java中使用`HttpClient`类来创建一个HTTP客户端,并在其中设置`maxHttpHeaderSize`选项来限制响应头的大小。例如:
```
HttpClient client = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.followRedirects(HttpClient.Redirect.NORMAL)
.connectTimeout(Duration.ofSeconds(20))
.build();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://example.com"))
.timeout(Duration.ofSeconds(20))
.header("Content-Type", "application/json")
.GET()
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
int maxHeaderSize = client.version() == HttpClient.Version.HTTP_2 ? 16384 : 8192;
client = client.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.followRedirects(HttpClient.Redirect.NORMAL)
.connectTimeout(Duration.ofSeconds(20))
.version(HttpClient.Version.HTTP_1_1)
.version(HttpClient.Version.HTTP_2)
.option(HttpClient.Builder.MAX_RESPONSE_HEADER_SIZE, maxHeaderSize)
.build();
```
以上是设置`maxHttpHeaderSize`选项的示例代码,希望能对您有所帮助。