proxy support for cookie session and IAM authentication

CHANGES.md

@@ -1,3 +1,6 @@
+# UNRELEASED
+- [FIXED] Enable proxy support for session cookie and IAM authentication.
+
 # 2.20.0 (2021-08-26)
 - [FIXED] Type of `sinceSeq` can be also a `String` besides an `Integer`.
 - [DEPRECATED] This library is now deprecated and will be EOL on Dec 31 2021.

cloudant-client/src/main/java/com/cloudant/client/api/ClientBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015, 2020 IBM Corp. All rights reserved.
+ * Copyright © 2015, 2021 IBM Corp. All rights reserved.
  *
  * Licensed 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
@@ -257,7 +257,7 @@ public CloudantClient build() {
 
             // Create IAM cookie interceptor and set in HttpConnection interceptors
             IamCookieInterceptor cookieInterceptor = new IamCookieInterceptor(this.iamApiKey,
-                    this.url.toString());
+                    this.url.toString(), this.proxyURL);
 
             props.addRequestInterceptors(cookieInterceptor);
             props.addResponseInterceptors(cookieInterceptor);
@@ -274,7 +274,9 @@ else if (this.username != null && this.password != null) {
             //make interceptor if both username and password are not null
 
             //Create cookie interceptor and set in HttpConnection interceptors
-            CookieInterceptor cookieInterceptor = new CookieInterceptor(username, password, this.url.toString());
+            CookieInterceptor cookieInterceptor = new CookieInterceptor(username, password,
+                    this.url.toString(), this.proxyURL);
+
 
             props.addRequestInterceptors(cookieInterceptor);
             props.addResponseInterceptors(cookieInterceptor);

cloudant-http/src/main/java/com/cloudant/http/internal/interceptors/CookieInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015, 2019 IBM Corp. All rights reserved.
+ * Copyright © 2015, 2021 IBM Corp. All rights reserved.
  *
  * Licensed 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
@@ -21,6 +21,7 @@
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.HttpURLConnection;
+import java.net.URL;
 import java.net.URLEncoder;
 import java.util.Locale;
 import java.util.logging.Level;
@@ -41,13 +42,26 @@ public class CookieInterceptor extends CookieInterceptorBase {
      * @param baseURL  The base URL to use when constructing an `_session` request.
      */
     public CookieInterceptor(String username, String password, String baseURL) {
+        this(username, password, baseURL, null);
+    }
+
+    /**
+     * Constructs a cookie interceptor with proxy url.
+     * Credentials should be supplied not URL encoded, this class
+     * will perform the necessary URL encoding.
+     *
+     * @param username The username to use when getting the cookie (not URL encoded)
+     * @param password The password to use when getting the cookie (not URL encoded)
+     * @param baseURL  The base URL to use when constructing an `_session` request.
+     * @param proxyURL The URL of the proxy server
+     */
+    public CookieInterceptor(String username, String password, String baseURL, URL proxyURL) {
         // Use form encoding for the user/pass submission
-        super(baseURL, "/_session", "application/x-www-form-urlencoded");
+        super(baseURL, "/_session", "application/x-www-form-urlencoded", proxyURL);
         try {
             this.auth = String.format("name=%s&password=%s", URLEncoder.encode(username, "UTF-8")
-                    , URLEncoder.encode(password, "UTF-8"))
+                            , URLEncoder.encode(password, "UTF-8"))
                     .getBytes("UTF-8");
-            ;
         } catch (UnsupportedEncodingException e) {
             //all JVMs should support UTF-8, so this should not happen
             throw new RuntimeException(e);

cloudant-http/src/main/java/com/cloudant/http/internal/interceptors/CookieInterceptorBase.java

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2017, 2019 IBM Corp. All rights reserved.
+ * Copyright © 2017, 2021 IBM Corp. All rights reserved.
  *
  * Licensed 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
@@ -59,13 +59,15 @@ public abstract class CookieInterceptorBase implements HttpConnectionRequestInte
     private final CookieManager cookieManager = new CookieManager();
     private final ReadWriteLock sessionLock = new ReentrantReadWriteLock(true);
     private volatile UUID sessionId = UUID.randomUUID();
+    private final URL proxyURL;
 
     /**
      * @param baseUrl         the server URL to get cookies from
      * @param endpoint        the server endpoint to get cookies from
      * @param requestMimeType the MIME Content-Type to use for the session request
+     * @param proxyURL        the proxy URL
      */
-    protected CookieInterceptorBase(String baseUrl, String endpoint, String requestMimeType) {
+    protected CookieInterceptorBase(String baseUrl, String endpoint, String requestMimeType, URL proxyURL) {
         try {
             baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
             endpoint = endpoint.startsWith("/") ? endpoint : "/" + endpoint;
@@ -77,6 +79,16 @@ protected CookieInterceptorBase(String baseUrl, String endpoint, String requestM
             logger.log(Level.SEVERE, "Failed to create URL for session endpoint", e);
             throw new RuntimeException(e);
         }
+        this.proxyURL = proxyURL;
+    }
+
+    /**
+     * @param baseUrl         the server URL to get cookies from
+     * @param endpoint        the server endpoint to get cookies from
+     * @param requestMimeType the MIME Content-Type to use for the session request
+     */
+    protected CookieInterceptorBase(String baseUrl, String endpoint, String requestMimeType) {
+        this(baseUrl, endpoint, requestMimeType, null);
     }
 
     /**
@@ -129,6 +141,10 @@ HttpConnection makeSessionRequest(URL url, byte[] payload, String contentMimeTyp
         conn.requestProperties.put("accept", "application/json");
         conn.setRequestBody(payload);
 
+        if (proxyURL != null) {
+            conn.connectionFactory.setProxy(this.proxyURL);
+        }
+
         //when we request the session we need all interceptors except this one
 
         conn.requestInterceptors.addAll(context.connection.requestInterceptors);

cloudant-http/src/main/java/com/cloudant/http/internal/interceptors/IamCookieInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2019 IBM Corp. All rights reserved.
+ * Copyright © 2019, 2021 IBM Corp. All rights reserved.
  *
  * Licensed 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
@@ -34,7 +34,11 @@ public class IamCookieInterceptor extends CookieInterceptorBase {
     private final byte[] tokenRequestPayload;
 
     public IamCookieInterceptor(String apiKey, String baseUrl) {
-        super(baseUrl, "/_iam_session", null);
+        this(apiKey, baseUrl, null);
+    }
+
+    public IamCookieInterceptor(String apiKey, String baseUrl, URL proxyURL) {
+        super(baseUrl, "/_iam_session", null, proxyURL);
 
         // Read iamServer from system property, or set default
         try {