jersey - 使用 Jersey 客户端设置 "Origin"和 "Access-Control-Request-Method" header

Question

Jersey 客户端没有为我设置“原点” header ，我想知道我是否遗漏了什么。

String origin="http://www.localhost.com";
ClientResponse response= webResourceBuilder("my/endpoint")
            .header( "origin" , origin)
            .header("Access-Control-Request-Method", "POST")
            .header("xorigin", origin)
            .header("whatever", "test")
            .accept("application/xml")
            .get(ClientResponse.class);

当我在运行时检查服务器端的请求 header 时，我找到了“xorigin”和“whatever” header ，但没有找到“origin”和“Access-Control-Request-Method”

如何设置这些标题？

Answer 1

默认 Jersey 客户端使用 HttpURLConnection向服务器发送请求。 HttpUrlConnection限制在请求中发送的某些 header ，请参阅:

/*
 * Restrict setting of request headers through the public api
 * consistent with JavaScript XMLHttpRequest2 with a few
 * exceptions. Disallowed headers are silently ignored for
 * backwards compatibility reasons rather than throwing a
 * SecurityException. For example, some applets set the
 * Host header since old JREs did not implement HTTP 1.1.
 * Additionally, any header starting with Sec- is
 * disallowed.
 *
 * The following headers are allowed for historical reasons:
 *
 * Accept-Charset, Accept-Encoding, Cookie, Cookie2, Date,
 * Referer, TE, User-Agent, headers beginning with Proxy-.
 *
 * The following headers are allowed in a limited form:
 *
 * Connection: close
 *
 * See http://www.w3.org/TR/XMLHttpRequest2.
 */
private static final boolean allowRestrictedHeaders;
private static final Set<String> restrictedHeaderSet;
private static final String[] restrictedHeaders = {
    /* Restricted by XMLHttpRequest2 */
    //"Accept-Charset",
    //"Accept-Encoding",
    "Access-Control-Request-Headers",
    "Access-Control-Request-Method",
    "Connection", /* close is allowed */
    "Content-Length",
    //"Cookie",
    //"Cookie2",
    "Content-Transfer-Encoding",
    //"Date",
    //"Expect",
    "Host",
    "Keep-Alive",
    "Origin",
    // "Referer",
    // "TE",
    "Trailer",
    "Transfer-Encoding",
    "Upgrade",
    //"User-Agent",
    "Via"
};

您有两种选择来处理这种情况:

使用默认的 Jersey 客户端，您需要设置系统属性

-Dsun.net.http.allowRestrictedHeaders=true

它禁止从请求中删除受限制的 header 。

使用 ApacheHttpClient/ApacheHttpClient4似乎没有这个限制。只需将以下依赖项之一添加到您的项目中:

<dependency>
    <groupId>com.sun.jersey.contribs</groupId>
    <artifactId>jersey-apache-client</artifactId>
    <version>1.15</version>
</dependency>

或者

<dependency>
    <groupId>com.sun.jersey.contribs</groupId>
    <artifactId>jersey-apache-client4</artifactId>
    <version>1.15</version>
</dependency>

然后创建您的客户端，如:

ApacheHttpClient.create(com.sun.jersey.api.client.config.ClientConfig);

或者

ApacheHttpClient4.create(com.sun.jersey.api.client.config.ClientConfig);