[ 
https://issues.apache.org/jira/browse/MRESOLVER-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17880978#comment-17880978
 ] 

ASF GitHub Bot commented on MRESOLVER-600:
------------------------------------------

michael-o commented on code in PR #576:
URL: https://github.com/apache/maven-resolver/pull/576#discussion_r1754560476


##########
maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/http/RFC9457/HttpRFC9457Exception.java:
##########
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.eclipse.aether.spi.connector.transport.http.RFC9457;
+
+import java.io.IOException;
+
+import org.eclipse.aether.spi.connector.transport.http.HttpTransporter;
+
+/**
+ * Exception thrown by {@link HttpTransporter} in case of errors.
+ *
+ * @since 2.0.2
+ */
+public class HttpRFC9457Exception extends IOException {
+    private final int statusCode;
+
+    private final String reasonPhrase;
+
+    private final RFC9457Payload rfc9457;
+
+    public HttpRFC9457Exception(int statusCode, String reasonPhrase, 
RFC9457Payload rfc9457) {
+        super(rfc9457.toString());
+        this.statusCode = statusCode;
+        this.reasonPhrase = reasonPhrase;
+        this.rfc9457 = rfc9457;
+    }
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public String getReasonPhrase() {
+        return reasonPhrase;
+    }
+
+    public RFC9457Payload getRFC9457() {

Review Comment:
   Isn't `payload` enough as name?  The actual RFC name is already in the class 
name.



##########
maven-resolver-transport-apache/src/test/java/org/eclipse/aether/transport/apache/ApacheTransporterTest.java:
##########
@@ -44,7 +44,8 @@
 class ApacheTransporterTest extends HttpTransporterTest {
 
     public ApacheTransporterTest() {
-        super(() -> new ApacheTransporterFactory(standardChecksumExtractor(), 
new TestPathProcessor()));
+        super(() -> new ApacheTransporterFactory(
+                standardChecksumExtractor(), new TestPathProcessor(), new 
ApacheRFC9457Reporter()));

Review Comment:
   Same here?



##########
maven-resolver-transport-jetty/src/main/java/org/eclipse/aether/transport/jetty/JettyRFC9457Reporter.java:
##########
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.eclipse.aether.transport.jetty;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import 
org.eclipse.aether.spi.connector.transport.http.HttpTransporterException;
+import org.eclipse.aether.spi.connector.transport.http.RFC9457.RFC9457Reporter;
+import org.eclipse.jetty.client.api.Response;
+import org.eclipse.jetty.client.util.InputStreamResponseListener;
+import org.eclipse.jetty.http.HttpHeader;
+
+public class JettyRFC9457Reporter extends 
RFC9457Reporter<InputStreamResponseListener, HttpTransporterException> {
+    @Override
+    protected boolean isRFC9457Message(final InputStreamResponseListener 
listener) {
+        try {
+            Response response = listener.get(1, TimeUnit.SECONDS);
+            String contentType = 
response.getHeaders().get(HttpHeader.CONTENT_TYPE);
+            return hasRFC9457ContentType(contentType);
+        } catch (InterruptedException | TimeoutException | ExecutionException 
e) {
+            return false;
+        }
+    }
+
+    @Override
+    protected int getStatusCode(final InputStreamResponseListener listener) {
+        try {
+            Response response = listener.get(1, TimeUnit.SECONDS);
+            return response.getStatus();
+        } catch (InterruptedException | TimeoutException | ExecutionException 
e) {
+            return -1;
+        }
+    }
+
+    @Override
+    protected String getReasonPhrase(final InputStreamResponseListener 
listener) {
+        try {
+            Response response = listener.get(1, TimeUnit.SECONDS);
+            return response.getReason();
+        } catch (InterruptedException | TimeoutException | ExecutionException 
e) {
+            return null;
+        }
+    }
+
+    @Override
+    protected String getBody(final InputStreamResponseListener listener) 
throws IOException {
+        try (InputStream is = listener.getInputStream()) {
+            return new String(is.readAllBytes());

Review Comment:
   and here



##########
maven-resolver-transport-jdk-parent/maven-resolver-transport-jdk-11/src/main/java/org/eclipse/aether/transport/jdk/JdkRFC9457Reporter.java:
##########
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.eclipse.aether.transport.jdk;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.http.HttpResponse;
+import java.util.Optional;
+
+import 
org.eclipse.aether.spi.connector.transport.http.HttpTransporterException;
+import org.eclipse.aether.spi.connector.transport.http.RFC9457.RFC9457Reporter;
+
+public class JdkRFC9457Reporter extends 
RFC9457Reporter<HttpResponse<InputStream>, HttpTransporterException> {
+    @Override
+    protected boolean isRFC9457Message(final HttpResponse<InputStream> 
response) {
+        Optional<String> optionalContentType = 
response.headers().firstValue("Content-Type");
+        if (optionalContentType.isPresent()) {
+            String contentType = optionalContentType.get();
+            return hasRFC9457ContentType(contentType);
+        }
+        return false;
+    }
+
+    @Override
+    protected int getStatusCode(final HttpResponse<InputStream> response) {
+        return response.statusCode();
+    }
+
+    @Override
+    protected String getReasonPhrase(final HttpResponse<InputStream> response) 
{
+        return null;
+    }
+
+    @Override
+    protected String getBody(final HttpResponse<InputStream> response) throws 
IOException {
+        try (InputStream is = response.body()) {
+            return new String(is.readAllBytes());

Review Comment:
   Not good, this is subject to encoding issue. Pass "UTF-8".



##########
maven-resolver-transport-jdk-parent/maven-resolver-transport-jdk-8/src/main/java/org/eclipse/aether/transport/jdk/JdkRFC9457Reporter.java:
##########
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.eclipse.aether.transport.jdk;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+
+import 
org.eclipse.aether.spi.connector.transport.http.HttpTransporterException;
+import org.eclipse.aether.spi.connector.transport.http.RFC9457.RFC9457Reporter;
+
+public class JdkRFC9457Reporter extends RFC9457Reporter<HttpURLConnection, 
HttpTransporterException> {
+    @Override
+    protected boolean isRFC9457Message(final HttpURLConnection response) {
+        String contentType = response.getContentType();
+        return hasRFC9457ContentType(contentType);
+    }
+
+    @Override
+    protected int getStatusCode(final HttpURLConnection response) {
+        try {
+            return response.getResponseCode();
+        } catch (IOException e) {
+            return -1;
+        }
+    }
+
+    @Override
+    protected String getReasonPhrase(final HttpURLConnection response) {
+        return null;
+    }
+
+    @Override
+    protected String getBody(final HttpURLConnection response) throws 
IOException {
+        try (BufferedReader br = new BufferedReader(new 
InputStreamReader(response.getInputStream()))) {

Review Comment:
   Same here.



##########
maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/http/RFC9457/RFC9457Reporter.java:
##########
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.eclipse.aether.spi.connector.transport.http.RFC9457;
+
+import java.io.IOException;
+
+/**
+ * A reporter for RFC 9457 messages.
+ * RFC 9457 is a standard for reporting problems in HTTP responses as a JSON 
object.
+ * There are members specified in the RFC but none of those appear to be 
required,
+ * @see <a href=https://www.rfc-editor.org/rfc/rfc9457#section-3-7>rfc9457 
section 3.7</a>
+ * Given the JSON fields are not mandatory, this reporter simply extracts the 
body of the
+ * response without validation.
+ * A RFC 9457 message is detected by the content type 
"application/problem+json".
+ *
+ * @param <T> The type of the response.
+ * @param <E> The base exception type to throw if the response is not a 
RFC9457 message.
+ */
+public abstract class RFC9457Reporter<T, E extends Exception> {
+    protected abstract boolean isRFC9457Message(T response);
+
+    protected abstract int getStatusCode(T response);
+
+    protected abstract String getReasonPhrase(T response);
+
+    protected abstract String getBody(T response) throws IOException;
+
+    protected boolean hasRFC9457ContentType(String contentType) {
+        return "application/problem+json".equals(contentType);
+    }
+
+    /**
+     * Generates a {@link HttpRFC9457Exception} if the response type is a RFC 
9457 message.
+     * Otherwise, it throws the base exception
+     *
+     * @param response The response to check for RFC 9457 messages.
+     * @param baseException The base exception to throw if the response is not 
a RFC 9457 message.
+     */
+    public void generateException(T response, BiConsumerChecked<Integer, 
String, E> baseException)
+            throws E, HttpRFC9457Exception {
+        int statusCode = getStatusCode(response);
+        String reasonPhrase = getReasonPhrase(response);
+
+        if (isRFC9457Message(response)) {
+            String body;
+            try {
+                body = getBody(response);
+            } catch (IOException ignore) {
+                // No body found but it is representing a RFC 9457 message due 
to the content type.
+                throw new HttpRFC9457Exception(statusCode, reasonPhrase, new 
RFC9457Payload());
+            }
+
+            if (body != null && !body.isEmpty()) {
+                RFC9457Payload rfc9457Payload = RFC9457Parser.parse(body);
+                throw new HttpRFC9457Exception(statusCode, reasonPhrase, 
rfc9457Payload);
+            }
+            throw new HttpRFC9457Exception(statusCode, reasonPhrase, new 
RFC9457Payload());

Review Comment:
   Does it make sense to create `RFC9457Payload.INSTANCE` for such a case?



##########
maven-resolver-transport-jetty/src/test/java/org/eclipse/aether/transport/jetty/JettyTransporterTest.java:
##########
@@ -59,6 +59,7 @@ protected void testRetryHandler_explicitCount_positive() {}
     protected void 
testPut_Authenticated_ExpectContinueRejected_ExplicitlyConfiguredHeader() {}
 
     public JettyTransporterTest() {
-        super(() -> new JettyTransporterFactory(standardChecksumExtractor(), 
new TestPathProcessor()));
+        super(() -> new JettyTransporterFactory(
+                standardChecksumExtractor(), new TestPathProcessor(), new 
JettyRFC9457Reporter()));

Review Comment:
   HEre?





> Implement RFC 9457
> ------------------
>
>                 Key: MRESOLVER-600
>                 URL: https://issues.apache.org/jira/browse/MRESOLVER-600
>             Project: Maven Resolver
>          Issue Type: New Feature
>          Components: Resolver
>            Reporter: Mark Dodgson
>            Priority: Minor
>
> HTTP1.1 [RFC 
> 9112|https://www.rfc-editor.org/rfc/rfc9112.html#name-status-line] section 4 
> defines the response status code to optionally include a text description 
> (human readable) of the reason for the status code.
> There is an additional [RFC9457|https://www.rfc-editor.org/rfc/rfc9457] which 
> makes use of the body to inform of a reason for the error response allowing 
> for easier investigation.
> h2. Why is this important
> [RFC9113|https://www.rfc-editor.org/rfc/rfc9113] is the HTTP2 protocol 
> standard and the response status only considers the [status 
> code|https://www.rfc-editor.org/rfc/rfc9113#name-response-pseudo-header-fiel] 
> and not the reason phrase, as such important information can be lost in 
> helping the client determine a route cause of a failure.



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