feat: Support http proxy (#179)

allow users to configure and use HTTP proxies in the IntelliJ environment.

Signed-off-by: Chao Wang <[email protected]>

Author: soul2zimate

README.md

@@ -137,6 +137,9 @@ according to your preferences.
   <br >You can set the vulnerability severity alert level to `Error` or `Warning` for inline notifications of detected
   vulnerabilities.
 
+- **Proxy Configuration** :
+  <br >From IntelliJ IDEA Appearance & Behavior > System Settings > HTTP Proxy, you can configure a proxy for all HTTP requests made by the plugin. This is useful when your environment requires going through a proxy to access external services. For example:`http://proxy.example.com:8080`
+
 ## Features
 
 - **Component analysis**

src/main/java/org/jboss/tools/intellij/exhort/ApiService.java

@@ -17,6 +17,8 @@
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.extensions.PluginDescriptor;
 import com.intellij.openapi.extensions.PluginId;
+import com.intellij.util.net.ProxyConfiguration;
+import com.intellij.util.net.ProxySettings;
 import com.redhat.exhort.Api;
 import com.redhat.exhort.api.v4.AnalysisReport;
 import com.redhat.exhort.impl.ExhortApi;
@@ -26,6 +28,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ExecutionException;
@@ -211,5 +214,32 @@ private void setRequestProperties(final String manifestName) {
         if (!"go.mod".equals(manifestName) && !"requirements.txt".equals(manifestName)) {
             System.clearProperty("MATCH_MANIFEST_VERSIONS");
         }
+        Optional<String> proxyUrlOpt = getProxyUrl();
+        if (proxyUrlOpt.isPresent()) {
+            System.setProperty("EXHORT_PROXY_URL", proxyUrlOpt.get());
+        } else {
+            System.clearProperty("EXHORT_PROXY_URL");
+        }
+    }
+
+    public static Optional<String> getProxyUrl() {
+        // This API only works in 2024.2+ versions.
+        ProxyConfiguration proxyConfiguration = ProxySettings.getInstance().getProxyConfiguration();
+
+        if (proxyConfiguration instanceof ProxyConfiguration.StaticProxyConfiguration) {
+            ProxyConfiguration.StaticProxyConfiguration staticProxyConfiguration =
+                    (ProxyConfiguration.StaticProxyConfiguration) proxyConfiguration;
+
+            String protocol = staticProxyConfiguration.getProtocol().toString().toLowerCase(); // e.g., "http" or "socks"
+            String host = staticProxyConfiguration.getHost();
+            int port = staticProxyConfiguration.getPort();
+
+            if (host != null && !host.isBlank() && port > 0 && protocol.equals("http")) {
+                String proxyUrl = protocol + "://" + host.trim() + ":" + port;
+                return Optional.of(proxyUrl);
+            }
+        }
+
+        return Optional.empty();
     }
 }

src/main/java/org/jboss/tools/intellij/image/ApiService.java

@@ -30,12 +30,15 @@
 import java.nio.file.Path;
 import java.util.Collection;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ExecutionException;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import static org.jboss.tools.intellij.exhort.ApiService.getProxyUrl;
+
 @Service(Service.Level.APP)
 public final class ApiService {
 
@@ -163,5 +166,12 @@ private void setServiceEnvironment() {
         } else {
             System.clearProperty("EXHORT_IMAGE_PLATFORM");
         }
+
+        Optional<String> proxyUrlOpt = getProxyUrl();
+        if (proxyUrlOpt.isPresent()) {
+            System.setProperty("EXHORT_PROXY_URL", proxyUrlOpt.get());
+        } else {
+            System.clearProperty("EXHORT_PROXY_URL");
+        }
     }
 }