encoding 설정 지원

2024-12-06 15:44:05 +09:00
parent 552af57864
commit 50d31ebe46
3 changed files with 122 additions and 6 deletions
@@ -0,0 +1,80 @@
+package com.eactive.testmaster.client.service;
+
+import com.eactive.testmaster.client.dto.ApiRequestDTO;
+import com.eactive.testmaster.client.dto.ApiRequestKeyValueDTO;
+import io.netty.util.CharsetUtil;
+import java.nio.charset.Charset;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.apache.commons.lang3.StringUtils;
+
+public class RequestCharsetUtils {
+    private static final Pattern CHARSET_PATTERN = Pattern.compile("charset\\s*=\\s*([^;\\s]+)", Pattern.CASE_INSENSITIVE);
+    private static final String CONTENT_TYPE_HEADER = "Content-Type";
+    private static final Charset DEFAULT_CHARSET = determineDefaultCharset();
+
+    /**
+     * Determines the default charset based on system properties
+     * Falls back to UTF-8 if system encoding is not available or invalid
+     */
+    private static Charset determineDefaultCharset() {
+        try {
+            String systemEncoding = System.getProperty("file.encoding");
+            if (StringUtils.isNotBlank(systemEncoding)) {
+                return Charset.forName(systemEncoding);
+            }
+        } catch (IllegalArgumentException | SecurityException e) {
+            // Log warning about fallback to UTF-8
+        }
+        return CharsetUtil.UTF_8;
+    }
+
+    /**
+     * Extracts charset from request headers with fallback to system default charset
+     * @param apiRequest The API request containing headers
+     * @return The detected charset or system default charset
+     */
+    public static Charset extractRequestCharset(ApiRequestDTO apiRequest) {
+        if (apiRequest == null || apiRequest.getHeaders() == null) {
+            return DEFAULT_CHARSET;
+        }
+
+        return apiRequest.getHeaders().stream()
+            .filter(ApiRequestKeyValueDTO::isEnabled)
+            .filter(header -> CONTENT_TYPE_HEADER.equalsIgnoreCase(header.getKey()))
+            .findFirst()
+            .map(RequestCharsetUtils::parseCharsetFromContentType)
+            .orElse(DEFAULT_CHARSET);
+    }
+
+    /**
+     * Parses charset from Content-Type header value
+     * @param contentTypeHeader The Content-Type header DTO
+     * @return The detected charset or system default charset
+     */
+    private static Charset parseCharsetFromContentType(ApiRequestKeyValueDTO contentTypeHeader) {
+        String contentType = contentTypeHeader.getValue();
+        if (StringUtils.isBlank(contentType)) {
+            return DEFAULT_CHARSET;
+        }
+
+        Matcher matcher = CHARSET_PATTERN.matcher(contentType);
+        if (matcher.find()) {
+            String charsetName = matcher.group(1).trim();
+            try {
+                return Charset.forName(charsetName);
+            } catch (IllegalArgumentException e) {
+                // Log warning about unsupported charset
+                return DEFAULT_CHARSET;
+            }
+        }
+
+        // Handle common content types without explicit charset
+        if (contentType.contains("application/json")) {
+            return CharsetUtil.UTF_8; // JSON should always use UTF-8 per RFC 8259
+        }
+
+        return DEFAULT_CHARSET;
+    }
+
+}