是否有一种方法允许多个跨域使用Access-Control-Allow-Origin头?
我知道*,但它太开放了。我只讲几个域。
举个例子,是这样的:
Access-Control-Allow-Origin: http://domain1.example, http://domain2.example
我已经尝试了上面的代码,但它似乎不能在Firefox中工作。
是否可以指定多个域,还是只能指定一个域?
是否有一种方法允许多个跨域使用Access-Control-Allow-Origin头?
我知道*,但它太开放了。我只讲几个域。
举个例子,是这样的:
Access-Control-Allow-Origin: http://domain1.example, http://domain2.example
我已经尝试了上面的代码,但它似乎不能在Firefox中工作。
是否可以指定多个域,还是只能指定一个域?
当前回答
这招对我很管用:
SetEnvIf Origin "^http(s)?://(.+\.)?(domain\.example|domain2\.example)$" origin_is=$0
Header always set Access-Control-Allow-Origin %{origin_is}e env=origin_is
当放入。htaccess时,它肯定会工作。
其他回答
也许我错了,但据我所知,Access-Control-Allow-Origin有一个“origin-list”作为参数。
根据定义,origin-list为:
origin = "origin" ":" 1*WSP [ "null" / origin-list ]
origin-list = serialized-origin *( 1*WSP serialized-origin )
serialized-origin = scheme "://" host [ ":" port ]
; <scheme>, <host>, <port> productions from RFC3986
由此,我认为不同的起源是被承认的,并且应该被空间分隔开。
对于安装了URL重写2.0模块的iis7.5 +,请参阅此SO答案
对于ExpressJS应用程序,您可以使用:
app.use((req, res, next) => {
const corsWhitelist = [
'https://domain1.example',
'https://domain2.example',
'https://domain3.example'
];
if (corsWhitelist.indexOf(req.headers.origin) !== -1) {
res.header('Access-Control-Allow-Origin', req.headers.origin);
res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
}
next();
});
只能为Access-Control-Allow-Origin标头指定一个原点。但是您可以根据请求在响应中设置原点。不要忘记设置Vary标头。在PHP中,我将做以下工作:
/**
* Enable CORS for the passed origins.
* Adds the Access-Control-Allow-Origin header to the response with the origin that matched the one in the request.
* @param array $origins
* @return string|null returns the matched origin or null
*/
function allowOrigins($origins)
{
$val = $_SERVER['HTTP_ORIGIN'] ?? null;
if (in_array($val, $origins, true)) {
header('Access-Control-Allow-Origin: '.$val);
header('Vary: Origin');
return $val;
}
return null;
}
if (allowOrigins(['http://localhost', 'https://localhost'])) {
echo your response here, e.g. token
}
下面是一个Java web应用的解决方案,基于yesthatguy的回答。
我使用的是Jersey REST 1.x
配置web.xml以识别Jersey REST和CORSResponseFilter
<!-- Jersey REST config -->
<servlet>
<servlet-name>JAX-RS Servlet</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
<param-value>com.your.package.CORSResponseFilter</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.your.package</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>JAX-RS Servlet</servlet-name>
<url-pattern>/ws/*</url-pattern>
</servlet-mapping>
下面是CORSResponseFilter的代码
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;
public class CORSResponseFilter implements ContainerResponseFilter{
@Override
public ContainerResponse filter(ContainerRequest request,
ContainerResponse response) {
String[] allowDomain = {"http://localhost:9000","https://my.domain.example"};
Set<String> allowedOrigins = new HashSet<String>(Arrays.asList (allowDomain));
String originHeader = request.getHeaderValue("Origin");
if(allowedOrigins.contains(originHeader)) {
response.getHttpHeaders().add("Access-Control-Allow-Origin", originHeader);
response.getHttpHeaders().add("Access-Control-Allow-Headers",
"origin, content-type, accept, authorization");
response.getHttpHeaders().add("Access-Control-Allow-Credentials", "true");
response.getHttpHeaders().add("Access-Control-Allow-Methods",
"GET, POST, PUT, DELETE, OPTIONS, HEAD");
}
return response;
}
}