REPORT-57806 主题获取

【问题原因】
主题文件下载后读取失败

【改动思路】
同上

designer-form/src/main/java/com/fr/design/mainframe/share/util/DownloadUtils.java

@@ -1,7 +1,6 @@
 package com.fr.design.mainframe.share.util;
 
 import com.fr.base.theme.FormTheme;
-import com.fr.base.theme.TemplateTheme;
 import com.fr.design.DesignerEnvManager;
 import com.fr.design.extra.PluginConstants;
 import com.fr.form.share.base.CancelCheck;
@@ -15,7 +14,6 @@ import com.fr.stable.StringUtils;
 import com.fr.stable.xml.XMLPrintWriter;
 import com.fr.stable.xml.XMLReaderHelper;
 import com.fr.stable.xml.XMLableReader;
-import com.fr.third.javax.xml.stream.XMLStreamException;
 import com.fr.third.org.apache.http.HttpEntity;
 import com.fr.third.org.apache.http.HttpException;
 import com.fr.third.org.apache.http.HttpStatus;
@@ -30,11 +28,12 @@ import com.fr.third.org.apache.http.impl.client.HttpClients;
 import org.jetbrains.annotations.NotNull;
 
 import javax.crypto.Cipher;
+import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileOutputStream;
-import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.security.KeyFactory;
 import java.security.interfaces.RSAPublicKey;
@@ -147,8 +146,16 @@ public class DownloadUtils {
             }
             if (fileRes.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                 HttpEntity entity = fileRes.getEntity();
-                InputStream content = entity.getContent();
-                XMLableReader reader = XMLReaderHelper.createXMLableReader(content, XMLPrintWriter.XML_ENCODER);
+
+                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
+                StringBuilder stringBuilder = new StringBuilder();
+                String line;
+                while ((line = bufferedReader.readLine()) != null) {
+                    stringBuilder.append(line);
+                }
+
+                String content = stringBuilder.toString();
+                XMLableReader reader = XMLReaderHelper.createXMLableReader(new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8)), XMLPrintWriter.XML_ENCODER);
 
                 FormTheme theme = new FormTheme();
                 reader.readXMLObject(theme);