Add support for Forwarded By HTTP headers

See gh-34683

Signed-off-by: Mengqi Xu <2663479778@qq.com>
This commit is contained in:
Mengqi Xu
2025-03-29 23:05:58 +08:00
committed by Brian Clozel
parent 1653ec3b44
commit 7b3c4e5893
7 changed files with 219 additions and 3 deletions
@@ -49,6 +49,7 @@ import static org.mockito.Mockito.mock;
* @author Rob Winch
* @author Brian Clozel
* @author Sebastien Deleuze
* @author Mengqi Xu
*/
class ForwardedHeaderFilterTests {
@@ -66,6 +67,8 @@ class ForwardedHeaderFilterTests {
private static final String X_FORWARDED_FOR = "x-forwarded-for";
private static final String X_FORWARDED_BY = "x-forwarded-by";
private final ForwardedHeaderFilter filter = new ForwardedHeaderFilter();
@@ -93,6 +96,7 @@ class ForwardedHeaderFilterTests {
testShouldFilter(X_FORWARDED_SSL);
testShouldFilter(X_FORWARDED_PREFIX);
testShouldFilter(X_FORWARDED_FOR);
testShouldFilter(X_FORWARDED_BY);
}
private void testShouldFilter(String headerName) {
@@ -115,6 +119,7 @@ class ForwardedHeaderFilterTests {
this.request.addHeader(X_FORWARDED_PORT, "443");
this.request.addHeader("foo", "bar");
this.request.addHeader(X_FORWARDED_FOR, "[203.0.113.195]");
this.request.addHeader(X_FORWARDED_BY, "[203.0.113.196]");
this.filter.doFilter(this.request, new MockHttpServletResponse(), this.filterChain);
HttpServletRequest actual = (HttpServletRequest) this.filterChain.getRequest();
@@ -126,11 +131,13 @@ class ForwardedHeaderFilterTests {
assertThat(actual.getServerPort()).isEqualTo(443);
assertThat(actual.isSecure()).isTrue();
assertThat(actual.getRemoteAddr()).isEqualTo(actual.getRemoteHost()).isEqualTo("[203.0.113.195]");
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("[203.0.113.196]");
assertThat(actual.getHeader(X_FORWARDED_PROTO)).isNull();
assertThat(actual.getHeader(X_FORWARDED_HOST)).isNull();
assertThat(actual.getHeader(X_FORWARDED_PORT)).isNull();
assertThat(actual.getHeader(X_FORWARDED_FOR)).isNull();
assertThat(actual.getHeader(X_FORWARDED_BY)).isNull();
assertThat(actual.getHeader("foo")).isEqualTo("bar");
}
@@ -143,6 +150,7 @@ class ForwardedHeaderFilterTests {
this.request.addHeader(X_FORWARDED_SSL, "on");
this.request.addHeader("foo", "bar");
this.request.addHeader(X_FORWARDED_FOR, "203.0.113.195");
this.request.addHeader(X_FORWARDED_BY, "203.0.113.196");
this.filter.setRemoveOnly(true);
this.filter.doFilter(this.request, new MockHttpServletResponse(), this.filterChain);
@@ -156,12 +164,14 @@ class ForwardedHeaderFilterTests {
assertThat(actual.isSecure()).isFalse();
assertThat(actual.getRemoteAddr()).isEqualTo(MockHttpServletRequest.DEFAULT_REMOTE_ADDR);
assertThat(actual.getRemoteHost()).isEqualTo(MockHttpServletRequest.DEFAULT_REMOTE_HOST);
assertThat(actual.getLocalAddr()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_ADDR);
assertThat(actual.getHeader(X_FORWARDED_PROTO)).isNull();
assertThat(actual.getHeader(X_FORWARDED_HOST)).isNull();
assertThat(actual.getHeader(X_FORWARDED_PORT)).isNull();
assertThat(actual.getHeader(X_FORWARDED_SSL)).isNull();
assertThat(actual.getHeader(X_FORWARDED_FOR)).isNull();
assertThat(actual.getHeader(X_FORWARDED_BY)).isNull();
assertThat(actual.getHeader("foo")).isEqualTo("bar");
}
@@ -541,6 +551,83 @@ class ForwardedHeaderFilterTests {
}
@Nested
class ForwardedBy {
@Test
void xForwardedForEmpty() throws Exception {
request.addHeader(X_FORWARDED_BY, "");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_ADDR);
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
@Test
void xForwardedForSingleIdentifier() throws Exception {
request.addHeader(X_FORWARDED_BY, "203.0.113.195");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("203.0.113.195");
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
@Test
void xForwardedForMultipleIdentifiers() throws Exception {
request.addHeader(X_FORWARDED_BY, "203.0.113.195, 70.41.3.18, 150.172.238.178");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("203.0.113.195");
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
@Test
void forwardedForIpV4Identifier() throws Exception {
request.addHeader(FORWARDED, "By=203.0.113.195");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("203.0.113.195");
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
@Test
void forwardedForIpV6Identifier() throws Exception {
request.addHeader(FORWARDED, "By=\"[2001:db8:cafe::17]\"");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("[2001:db8:cafe::17]");
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
@Test
void forwardedForIpV4IdentifierWithPort() throws Exception {
request.addHeader(FORWARDED, "By=\"203.0.113.195:47011\"");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("203.0.113.195");
assertThat(actual.getLocalPort()).isEqualTo(47011);
}
@Test
void forwardedForIpV6IdentifierWithPort() throws Exception {
request.addHeader(FORWARDED, "By=\"[2001:db8:cafe::17]:47011\"");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("[2001:db8:cafe::17]");
assertThat(actual.getLocalPort()).isEqualTo(47011);
}
@Test
void forwardedForMultipleIdentifiers() throws Exception {
request.addHeader(FORWARDED, "by=203.0.113.195;proto=http, by=\"[2001:db8:cafe::17]\", by=unknown");
HttpServletRequest actual = filterAndGetWrappedRequest();
assertThat(actual.getLocalAddr()).isEqualTo(actual.getLocalAddr()).isEqualTo("203.0.113.195");
assertThat(actual.getLocalPort()).isEqualTo(MockHttpServletRequest.DEFAULT_SERVER_PORT);
}
}
@Nested
class SendRedirect {
@@ -33,6 +33,7 @@ import static org.assertj.core.api.Assertions.assertThat;
*
* @author Rossen Stoyanchev
* @author Sebastien Deleuze
* @author Mengqi Xu
*/
class ForwardedHeaderTransformerTests {
@@ -52,6 +53,7 @@ class ForwardedHeaderTransformerTests {
headers.add("X-Forwarded-Prefix", "prefix");
headers.add("X-Forwarded-Ssl", "on");
headers.add("X-Forwarded-For", "203.0.113.195");
headers.add("X-Forwarded-By", "203.0.113.196");
ServerHttpRequest request = this.requestMutator.apply(getRequest(headers));
assertForwardedHeadersRemoved(request);
@@ -233,6 +235,40 @@ class ForwardedHeaderTransformerTests {
assertThat(request.getRemoteAddress().getHostName()).isEqualTo("203.0.113.195");
}
@Test
void forwardedBy() {
HttpHeaders headers = new HttpHeaders();
headers.add("Forwarded", "by=\"203.0.113.195:4711\";host=84.198.58.199;proto=https");
InetSocketAddress localAddress = new InetSocketAddress("example.client", 47011);
ServerHttpRequest request = MockServerHttpRequest
.method(HttpMethod.GET, URI.create("https://example.com/a%20b?q=a%2Bb"))
.localAddress(localAddress)
.headers(headers)
.build();
request = this.requestMutator.apply(request);
assertThat(request.getLocalAddress()).isNotNull();
assertThat(request.getLocalAddress().getHostName()).isEqualTo("203.0.113.195");
assertThat(request.getLocalAddress().getPort()).isEqualTo(4711);
}
@Test
void xForwardedBy() {
HttpHeaders headers = new HttpHeaders();
headers.add("x-forwarded-by", "203.0.113.195, 70.41.3.18, 150.172.238.178");
ServerHttpRequest request = MockServerHttpRequest
.method(HttpMethod.GET, URI.create("https://example.com/a%20b?q=a%2Bb"))
.headers(headers)
.build();
request = this.requestMutator.apply(request);
assertThat(request.getLocalAddress()).isNotNull();
assertThat(request.getLocalAddress().getHostName()).isEqualTo("203.0.113.195");
}
private MockServerHttpRequest getRequest(HttpHeaders headers) {
return MockServerHttpRequest.get(BASE_URL).headers(headers).build();