fix alowPatch

hutool-http/src/main/java/cn/hutool/http/HttpConnection.java

@@ -13,8 +13,6 @@ import javax.net.ssl.SSLSocketFactory;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
 import java.net.HttpURLConnection;
 import java.net.ProtocolException;
 import java.net.Proxy;
@@ -122,7 +120,7 @@ public class HttpConnection {
 
 			// 增加PATCH方法支持
 			if (Method.PATCH.equals(method)) {
-				allowPatch();
+				HttpGlobalConfig.allowPatch();
 			}
 		}
 
@@ -546,23 +544,5 @@ public class HttpConnection {
 	private URLConnection openConnection() throws IOException {
 		return (null == this.proxy) ? url.openConnection() : url.openConnection(this.proxy);
 	}
-
-	/**
-	 * 增加支持的METHOD方法
-	 * see: https://stackoverflow.com/questions/25163131/httpurlconnection-invalid-http-method-patch
-	 *
-	 * @since 5.1.6
-	 */
-	private static void allowPatch() {
-		final Field methodsField = ReflectUtil.getField(HttpURLConnection.class, "methods");
-		if (null != methodsField) {
-			// 去除final修饰
-			ReflectUtil.setFieldValue(methodsField, "modifiers", methodsField.getModifiers() & ~Modifier.FINAL);
-			final String[] methods = {
-					"GET", "POST", "HEAD", "OPTIONS", "PUT", "DELETE", "TRACE", "PATCH"
-			};
-			ReflectUtil.setFieldValue(null, methodsField, methods);
-		}
-	}
 	// --------------------------------------------------------------- Private Method end
-}
+}

hutool-http/src/main/java/cn/hutool/http/HttpGlobalConfig.java

@@ -1,13 +1,17 @@
 package cn.hutool.http;
 
-import java.io.Serializable;
-import java.net.CookieManager;
-
+import cn.hutool.core.util.ReflectUtil;
 import cn.hutool.http.cookie.GlobalCookieManager;
 
+import java.io.Serializable;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.net.CookieManager;
+import java.net.HttpURLConnection;
+
 /**
  * HTTP 全局参数配置
- * 
+ *
  * @author Looly
  * @since 4.6.2
  */
@@ -15,10 +19,11 @@ public class HttpGlobalConfig implements Serializable {
 	private static final long serialVersionUID = 1L;
 
 	protected static int timeout = -1;
+	private static boolean isAllowPatch = false;
 
 	/**
 	 * 获取全局默认的超时时长
-	 * 
+	 *
 	 * @return 全局默认的超时时长
 	 */
 	public static int getTimeout() {
@@ -27,16 +32,16 @@ public class HttpGlobalConfig implements Serializable {
 
 	/**
 	 * 设置默认的连接和读取超时时长
-	 * 
+	 *
 	 * @param customTimeout 超时时长
 	 */
-	public static void setTimeout(int customTimeout) {
+	synchronized public static void setTimeout(int customTimeout) {
 		timeout = customTimeout;
 	}
-	
+
 	/**
 	 * 获取Cookie管理器，用于自定义Cookie管理
-	 * 
+	 *
 	 * @return {@link CookieManager}
 	 * @since 4.1.0
 	 * @see GlobalCookieManager#getCookieManager()
@@ -47,7 +52,7 @@ public class HttpGlobalConfig implements Serializable {
 
 	/**
 	 * 自定义{@link CookieManager}
-	 * 
+	 *
 	 * @param customCookieManager 自定义的{@link CookieManager}
 	 * @since 4.5.14
 	 * @see GlobalCookieManager#setCookieManager(CookieManager)
@@ -55,14 +60,37 @@ public class HttpGlobalConfig implements Serializable {
 	public static void setCookieManager(CookieManager customCookieManager) {
 		GlobalCookieManager.setCookieManager(customCookieManager);
 	}
-	
+
 	/**
 	 * 关闭Cookie
-	 * 
+	 *
 	 * @since 4.1.9
 	 * @see GlobalCookieManager#setCookieManager(CookieManager)
 	 */
 	public static void closeCookie() {
 		GlobalCookieManager.setCookieManager(null);
 	}
+
+	/**
+	 * 增加支持的METHOD方法<br>
+	 * 此方法通过注入方式修改{@link HttpURLConnection}中的methods静态属性，增加PATCH方法<br>
+	 * see: https://stackoverflow.com/questions/25163131/httpurlconnection-invalid-http-method-patch
+	 *
+	 * @since 5.7.4
+	 */
+	synchronized public static void allowPatch() {
+		if(isAllowPatch){
+			return;
+		}
+		final Field methodsField = ReflectUtil.getField(HttpURLConnection.class, "methods");
+		if (null != methodsField) {
+			// 去除final修饰
+			ReflectUtil.setFieldValue(methodsField, "modifiers", methodsField.getModifiers() & ~Modifier.FINAL);
+			final String[] methods = {
+					"GET", "POST", "HEAD", "OPTIONS", "PUT", "DELETE", "TRACE", "PATCH"
+			};
+			ReflectUtil.setFieldValue(null, methodsField, methods);
+			isAllowPatch = true;
+		}
+	}
 }

hutool-http/src/main/java/cn/hutool/http/HttpInputStream.java

@@ -12,7 +12,7 @@ import java.util.zip.InflaterInputStream;
 
 /**
  * HTTP输入流，此流用于包装Http请求响应内容的流，用于解析各种压缩、分段的响应流内容
- * 
+ *
  * @author Looly
  *
  */
@@ -23,7 +23,7 @@ public class HttpInputStream extends InputStream {
 
 	/**
 	 * 构造
-	 * 
+	 *
 	 * @param response 响应对象
 	 */
 	public HttpInputStream(HttpResponse response) {
@@ -34,37 +34,38 @@ public class HttpInputStream extends InputStream {
 	public int read() throws IOException {
 		return this.in.read();
 	}
-	
+
+	@SuppressWarnings("NullableProblems")
 	@Override
 	public int read(byte[] b, int off, int len) throws IOException {
 		return this.in.read(b, off, len);
 	}
-	
+
 	@Override
 	public long skip(long n) throws IOException {
 		return this.in.skip(n);
 	}
-	
+
 	@Override
 	public int available() throws IOException {
 		return this.in.available();
 	}
-	
+
 	@Override
 	public void close() throws IOException {
 		this.in.close();
 	}
-	
+
 	@Override
 	public synchronized void mark(int readlimit) {
 		this.in.mark(readlimit);
 	}
-	
+
 	@Override
 	public synchronized void reset() throws IOException {
 		this.in.reset();
 	}
-	
+
 	@Override
 	public boolean markSupported() {
 		return this.in.markSupported();
@@ -72,7 +73,7 @@ public class HttpInputStream extends InputStream {
 
 	/**
 	 * 初始化流
-	 * 
+	 *
 	 * @param response 响应对象
 	 */
 	private void init(HttpResponse response) {
@@ -84,13 +85,13 @@ public class HttpInputStream extends InputStream {
 			}
 			// 服务器无返回内容，忽略之
 		}
-		
+
 		// 在一些情况下，返回的流为null，此时提供状态码说明
 		if (null == this.in) {
 			this.in = new ByteArrayInputStream(StrUtil.format("Error request, response status: {}", response.status).getBytes());
 			return;
 		}
-		
+
 		if (response.isGzip() && false == (response.in instanceof GZIPInputStream)) {
 			// Accept-Encoding: gzip
 			try {