1 files changed, 115 insertions, 0 deletions
diff --git a/src/main/java/com/juick/util/HttpUtils.java b/src/main/java/com/juick/util/HttpUtils.java
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+++ b/src/main/java/com/juick/util/HttpUtils.java
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+/*
+ * Copyright (C) 2008-2020, Juick
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.juick.util;
+
+import org.apache.commons.codec.digest.DigestUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.MediaType;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLConnection;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Iterator;
+import java.util.UUID;
+
+/**
+ *
+ * @author Ugnich Anton
+ */
+public class HttpUtils {
+    private static final Logger logger = LoggerFactory.getLogger(HttpUtils.class);
+
+    public static URI receiveMultiPartFile(MultipartFile attach, String tmpDir) throws IOException {
+        if (attach != null && !attach.isEmpty()) {
+            ImageInputStream iis = ImageIO.createImageInputStream(attach.getInputStream());
+            Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);
+
+            String format = StringUtils.EMPTY;
+            while (readers.hasNext()) {
+                ImageReader read = readers.next();
+                format = read.getFormatName();
+            }
+            String attachmentType = attachmentTypeFromFormat(format);
+            if (attachmentType.equals("jpg") || attachmentType.equals("png")) {
+                String attachmentFName = DigestUtils.md5Hex(UUID.randomUUID().toString()) + "." + attachmentType;
+                try {
+                    Files.write(Paths.get(tmpDir, attachmentFName),
+                            attach.getBytes());
+                    return URI.create(String.format("juick://%s", attachmentFName));
+                } catch (IOException e) {
+                    logger.warn("file receive error", e);
+                }
+            }
+            logger.warn("file type is unknown: {}", attach.getOriginalFilename());
+        }
+        return URI.create(StringUtils.EMPTY);
+    }
+
+    private static String attachmentTypeFromFormat(String format) throws IOException {
+        if (format != null && format.equals("JPEG")) {
+            return "jpg";
+        } else if (format != null && format.equals("png")) {
+            return "png";
+        } else {
+            throw new IOException("Wrong file type: " + format);
+        }
+    }
+
+    public static String mediaType(String attachmentType) {
+        return attachmentType.equals("jpg") ? MediaType.IMAGE_JPEG_VALUE : MediaType.IMAGE_PNG_VALUE;
+    }
+
+    public static URI downloadImage(URL url, String tmpDir) throws IOException {
+        ImageInputStream iis = ImageIO.createImageInputStream(url.openStream());
+        Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);
+
+        String format = StringUtils.EMPTY;
+        while (readers.hasNext()) {
+            ImageReader read = readers.next();
+            format = read.getFormatName();
+        }
+        URLConnection urlConn;
+        try {
+            urlConn = url.openConnection();
+        } catch (IOException e) {
+            logger.error(String.format("Failed open url: %s", url.toString()));
+            throw e;
+        }
+
+        try (InputStream is = new BufferedInputStream(urlConn.getInputStream())) {
+            String attachmentType = attachmentTypeFromFormat(format);
+
+            String attachmentFName = DigestUtils.md5Hex(UUID.randomUUID().toString()) + "." + attachmentType;
+            Files.copy(is, Paths.get(tmpDir, attachmentFName));
+            return URI.create(String.format("juick://%s", attachmentFName));
+        } catch (IOException e) {
+            logger.error(String.format("Failed download image by url: %s", url.toString()), e);
+            throw e;
+        }
+    }
+}