Adding origins whitelist support for CORS
Motivation: Currently the CORS support only handles a single origin, or a wildcard origin. This task should enhance Netty's CORS support to allow multiple origins to be specified. Just being allowed to specify one origin is particulary limiting when a site support both http and https for example. Modifications: - Updated CorsConfig and its Builder to accept multiple origins. Result: Users are now able to configure multiple origins for CORS. [https://github.com/netty/netty/issues/2346]
This commit is contained in:
Daniel Bevenius
Norman Maurer
parent
5f9993ee1f
commit
14b962a434
@ -26,6 +26,7 @@ import java.util.Collections;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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@ -36,7 +37,8 @@ import java.util.concurrent.Callable;
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*/
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public final class CorsConfig {
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private final String origin;
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private final Set<String> origins;
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private final boolean anyOrigin;
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private final boolean enabled;
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private final Set<String> exposeHeaders;
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private final boolean allowCredentials;
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@ -47,7 +49,8 @@ public final class CorsConfig {
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private final Map<CharSequence, Callable<?>> preflightHeaders;
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private CorsConfig(final Builder builder) {
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origin = builder.origin;
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origins = new LinkedHashSet<String>(builder.origins);
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anyOrigin = builder.anyOrigin;
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enabled = builder.enabled;
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exposeHeaders = builder.exposeHeaders;
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allowCredentials = builder.allowCredentials;
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@ -67,13 +70,31 @@ public final class CorsConfig {
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return enabled;
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}
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/**
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* Determines whether a wildcard origin, '*', is supported.
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*
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* @return {@code boolean} true if any origin is allowed.
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*/
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public boolean isAnyOriginSupported() {
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return anyOrigin;
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}
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/**
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* Returns the allowed origin. This can either be a wildcard or an origin value.
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*
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* @return the value that will be used for the CORS response header 'Access-Control-Allow-Origin'
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*/
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public String origin() {
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return origin;
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return origins.isEmpty() ? "*" : origins.iterator().next();
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}
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/**
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* Returns the set of allowed origins.
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*
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* @return {@code Set} the allowed origins.
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*/
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public Set<String> origins() {
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return origins;
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}
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/**
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@ -204,7 +225,8 @@ public final class CorsConfig {
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@Override
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public String toString() {
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return StringUtil.simpleClassName(this) + "[enabled=" + enabled +
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", origin=" + origin +
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", origins=" + origins +
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", anyOrigin=" + anyOrigin +
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", exposedHeaders=" + exposeHeaders +
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", isCredentialsAllowed=" + allowCredentials +
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", maxAge=" + maxAge +
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@ -218,8 +240,8 @@ public final class CorsConfig {
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*
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* @return Builder to support method chaining.
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*/
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public static Builder anyOrigin() {
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return new Builder("*");
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public static Builder withAnyOrigin() {
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return new Builder();
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}
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/**
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@ -228,15 +250,28 @@ public final class CorsConfig {
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* @return {@link Builder} to support method chaining.
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*/
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public static Builder withOrigin(final String origin) {
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if (origin.equals("*")) {
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return new Builder();
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}
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return new Builder(origin);
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}
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/**
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* Creates a {@link Builder} instance with the specified origins.
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*
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* @return {@link Builder} to support method chaining.
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*/
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public static Builder withOrigins(final String... origins) {
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return new Builder(origins);
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}
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/**
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* Builder used to configure and build a CorsConfig instance.
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*/
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public static class Builder {
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private final String origin;
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private final Set<String> origins;
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private final boolean anyOrigin;
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private boolean allowNullOrigin;
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private boolean enabled = true;
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private boolean allowCredentials;
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@ -250,10 +285,21 @@ public final class CorsConfig {
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/**
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* Creates a new Builder instance with the origin passed in.
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*
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* @param origin the origin to be used for this builder.
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* @param origins the origin to be used for this builder.
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*/
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public Builder(final String origin) {
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this.origin = origin;
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public Builder(final String... origins) {
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this.origins = new LinkedHashSet<String>(Arrays.asList(origins));
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anyOrigin = false;
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}
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/**
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* Creates a new Builder instance allowing any origin, "*" which is the
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* wildcard origin.
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*
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*/
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public Builder() {
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anyOrigin = true;
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origins = Collections.emptySet();
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}
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/**
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@ -85,15 +85,26 @@ public class CorsHandler extends ChannelDuplexHandler {
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final String origin = request.headers().get(ORIGIN);
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if (origin != null) {
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if ("null".equals(origin) && config.isNullOriginAllowed()) {
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response.headers().set(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
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} else {
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response.headers().set(ACCESS_CONTROL_ALLOW_ORIGIN, config.origin());
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setAnyOrigin(response);
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return true;
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}
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return true;
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if (config.isAnyOriginSupported()) {
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setAnyOrigin(response);
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return true;
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}
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if (config.origins().contains(origin)) {
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response.headers().set(ACCESS_CONTROL_ALLOW_ORIGIN, origin);
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return true;
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}
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logger.debug("Request origin [" + origin + "] was not among the configured origins " + config.origins());
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}
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return false;
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}
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private static void setAnyOrigin(final HttpResponse response) {
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response.headers().set(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
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}
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private void setAllowCredentials(final HttpResponse response) {
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if (config.isCredentialsAllowed()) {
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response.headers().set(ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
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@ -28,74 +28,93 @@ public class CorsConfigTest {
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@Test
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public void disabled() {
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final CorsConfig cors = withOrigin("*").disable().build();
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final CorsConfig cors = withAnyOrigin().disable().build();
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assertThat(cors.isCorsSupportEnabled(), is(false));
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}
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@Test
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public void anyOrigin() {
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final CorsConfig cors = withAnyOrigin().build();
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assertThat(cors.isAnyOriginSupported(), is(true));
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assertThat(cors.origin(), is("*"));
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assertThat(cors.origins().isEmpty(), is(true));
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}
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@Test
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public void wildcardOrigin() {
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final CorsConfig cors = anyOrigin().build();
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assertThat(cors.origin(), is(equalTo("*")));
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final CorsConfig cors = withOrigin("*").build();
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assertThat(cors.isAnyOriginSupported(), is(true));
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assertThat(cors.origin(), equalTo("*"));
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assertThat(cors.origins().isEmpty(), is(true));
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}
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@Test
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public void origin() {
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final CorsConfig cors = withOrigin("http://localhost:7888").build();
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assertThat(cors.origin(), is(equalTo("http://localhost:7888")));
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assertThat(cors.isAnyOriginSupported(), is(false));
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}
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@Test
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public void origins() {
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final String[] origins = {"http://localhost:7888", "https://localhost:7888"};
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final CorsConfig cors = withOrigins(origins).build();
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assertThat(cors.origins(), hasItems(origins));
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assertThat(cors.isAnyOriginSupported(), is(false));
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}
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@Test
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public void exposeHeaders() {
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final CorsConfig cors = withOrigin("*").exposeHeaders("custom-header1", "custom-header2").build();
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final CorsConfig cors = withAnyOrigin().exposeHeaders("custom-header1", "custom-header2").build();
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assertThat(cors.exposedHeaders(), hasItems("custom-header1", "custom-header2"));
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}
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@Test
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public void allowCredentials() {
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final CorsConfig cors = withOrigin("*").allowCredentials().build();
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final CorsConfig cors = withAnyOrigin().allowCredentials().build();
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assertThat(cors.isCredentialsAllowed(), is(true));
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}
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@Test
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public void maxAge() {
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final CorsConfig cors = withOrigin("*").maxAge(3000).build();
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final CorsConfig cors = withAnyOrigin().maxAge(3000).build();
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assertThat(cors.maxAge(), is(3000L));
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}
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@Test
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public void requestMethods() {
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final CorsConfig cors = withOrigin("*").allowedRequestMethods(HttpMethod.POST, HttpMethod.GET).build();
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final CorsConfig cors = withAnyOrigin().allowedRequestMethods(HttpMethod.POST, HttpMethod.GET).build();
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assertThat(cors.allowedRequestMethods(), hasItems(HttpMethod.POST, HttpMethod.GET));
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}
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@Test
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public void requestHeaders() {
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final CorsConfig cors = withOrigin("*").allowedRequestHeaders("preflight-header1", "preflight-header2").build();
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final CorsConfig cors = withAnyOrigin().allowedRequestHeaders("preflight-header1", "preflight-header2").build();
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assertThat(cors.allowedRequestHeaders(), hasItems("preflight-header1", "preflight-header2"));
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}
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@Test
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public void preflightResponseHeadersSingleValue() {
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final CorsConfig cors = withOrigin("*").preflightResponseHeader("SingleValue", "value").build();
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final CorsConfig cors = withAnyOrigin().preflightResponseHeader("SingleValue", "value").build();
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assertThat(cors.preflightResponseHeaders().get("SingleValue"), equalTo("value"));
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}
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@Test
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public void preflightResponseHeadersMultipleValues() {
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final CorsConfig cors = withOrigin("*").preflightResponseHeader("MultipleValues", "value1", "value2").build();
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final CorsConfig cors = withAnyOrigin().preflightResponseHeader("MultipleValues", "value1", "value2").build();
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assertThat(cors.preflightResponseHeaders().getAll("MultipleValues"), hasItems("value1", "value2"));
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}
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@Test
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public void defaultPreflightResponseHeaders() {
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final CorsConfig cors = withOrigin("*").build();
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final CorsConfig cors = withAnyOrigin().build();
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assertThat(cors.preflightResponseHeaders().get(Names.DATE), is(notNullValue()));
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assertThat(cors.preflightResponseHeaders().get(Names.CONTENT_LENGTH), is("0"));
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}
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@Test
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public void emptyPreflightResponseHeaders() {
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final CorsConfig cors = withOrigin("*").noPreflightResponseHeaders().build();
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final CorsConfig cors = withAnyOrigin().noPreflightResponseHeaders().build();
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assertThat(cors.preflightResponseHeaders(), equalTo(HttpHeaders.EMPTY_HEADERS));
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}
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@ -39,13 +39,13 @@ public class CorsHandlerTest {
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@Test
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public void nonCorsRequest() {
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final HttpResponse response = simpleRequest(CorsConfig.anyOrigin().build(), null);
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final HttpResponse response = simpleRequest(CorsConfig.withAnyOrigin().build(), null);
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assertThat(response.headers().contains(ACCESS_CONTROL_ALLOW_ORIGIN), is(false));
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}
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@Test
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public void simpleRequestWithAnyOrigin() {
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final HttpResponse response = simpleRequest(CorsConfig.anyOrigin().build(), "http://localhost:7777");
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final HttpResponse response = simpleRequest(CorsConfig.withAnyOrigin().build(), "http://localhost:7777");
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assertThat(response.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), is("*"));
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}
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@ -56,6 +56,24 @@ public class CorsHandlerTest {
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assertThat(response.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), is(origin));
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}
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@Test
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public void simpleRequestWithOrigins() {
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final String origin1 = "http://localhost:8888";
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final String origin2 = "https://localhost:8888";
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final String[] origins = {origin1, origin2};
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final HttpResponse response1 = simpleRequest(CorsConfig.withOrigins(origins).build(), origin1);
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assertThat(response1.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), is(origin1));
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final HttpResponse response2 = simpleRequest(CorsConfig.withOrigins(origins).build(), origin2);
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assertThat(response2.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), is(origin2));
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}
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@Test
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public void simpleRequestWithNoMatchingOrigin() {
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final String origin = "http://localhost:8888";
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final HttpResponse response = simpleRequest(CorsConfig.withOrigins("https://localhost:8888").build(), origin);
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assertThat(response.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), is(nullValue()));
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}
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@Test
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public void preflightDeleteRequestWithCustomHeaders() {
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final CorsConfig config = CorsConfig.withOrigin("http://localhost:8888")
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@ -152,7 +170,7 @@ public class CorsHandlerTest {
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@Test
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public void simpleRequestCustomHeaders() {
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final CorsConfig config = CorsConfig.anyOrigin().exposeHeaders("custom1", "custom2").build();
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final CorsConfig config = CorsConfig.withAnyOrigin().exposeHeaders("custom1", "custom2").build();
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final HttpResponse response = simpleRequest(config, "http://localhost:7777", "");
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assertThat(response.headers().get(ACCESS_CONTROL_ALLOW_ORIGIN), equalTo("*"));
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assertThat(response.headers().getAll(ACCESS_CONTROL_EXPOSE_HEADERS), hasItems("custom1", "custom1"));
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@ -160,21 +178,21 @@ public class CorsHandlerTest {
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@Test
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public void simpleRequestAllowCredentials() {
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final CorsConfig config = CorsConfig.anyOrigin().allowCredentials().build();
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final CorsConfig config = CorsConfig.withAnyOrigin().allowCredentials().build();
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final HttpResponse response = simpleRequest(config, "http://localhost:7777", "");
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assertThat(response.headers().get(ACCESS_CONTROL_ALLOW_CREDENTIALS), equalTo("true"));
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}
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@Test
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public void simpleRequestDoNotAllowCredentials() {
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final CorsConfig config = CorsConfig.anyOrigin().build();
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final CorsConfig config = CorsConfig.withAnyOrigin().build();
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final HttpResponse response = simpleRequest(config, "http://localhost:7777", "");
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assertThat(response.headers().contains(ACCESS_CONTROL_ALLOW_CREDENTIALS), is(false));
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}
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@Test
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public void simpleRequestExposeHeaders() {
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final CorsConfig config = CorsConfig.anyOrigin().exposeHeaders("one", "two").build();
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final CorsConfig config = CorsConfig.withAnyOrigin().exposeHeaders("one", "two").build();
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final HttpResponse response = simpleRequest(config, "http://localhost:7777", "");
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assertThat(response.headers().getAll(ACCESS_CONTROL_EXPOSE_HEADERS), hasItems("one", "two"));
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}
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@ -74,7 +74,7 @@ public class HttpServerInitializer extends ChannelInitializer<SocketChannel> {
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public void initChannel(SocketChannel ch) throws Exception {
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ChannelPipeline pipeline = ch.pipeline();
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CorsConfig corsConfig = CorsConfig.anyOrigin().build();
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CorsConfig corsConfig = CorsConfig.withAnyOrigin().build();
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pipeline.addLast("encoder", new HttpResponseEncoder());
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pipeline.addLast("decoder", new HttpRequestDecoder());
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pipeline.addLast("aggregator", new HttpObjectAggregator(65536));
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