本文实例为大家分享了Nginx代理输出缩放图片的具体代码，供大家参考，具体内容如下
nginx 配置文件：
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# document ppt convert Configuration.upstream document.polyv.net { server 127.0.0.1:8080;}server { listen 80; server_name document.polyv.net; index index.html index.htm; charset utf-8; client_max_body_size 1000m; # ignore favicon.ico not exist. location = /favicon.ico { log_not_found off; access_log off; } # not allow to visit hidden files. location ~ /\. { deny all; access_log off; log_not_found off; } location / { if ($request_filename ~* ^.*?\.(txt|doc|pdf|rar|gz|zip|docx|exe|xlsx|ppt|pptx)$) { add_header Content-Disposition: 'attachment;'; add_header Content-Type: 'APPLICATION/OCTET-STREAM'; } proxy_pass http://document.polyv.net; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header REQUEST_HOST $host; # include proxy.conf; charset UTF-8; } # user upload files location /images/ { #expires 7d; alias /data03/ovp/blobs/; proxy_store on; proxy_store_access user:rw group:rw all:rw; proxy_set_header Accept-Encoding ""; if ( !-f $request_filename ) { proxy_pass http://document.polyv.net; } } location /blobs/ { #expires 7d; alias /data03/ovp/blobs/; } location /preview/images/ { #expires 7d; alias /data03/ovp/blobs/; proxy_store on; proxy_store_access user:rw group:rw all:rw; proxy_set_header Accept-Encoding ""; if ( !-f $request_filename ) { proxy_pass http://document.polyv.net; } }} |
代理输出缩放图片
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package com.document.handle.controller;import java.io.BufferedInputStream;import java.io.File;import java.io.IOException;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.ServletRequestUtils;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import com.document.tool.ImageMagickUtils;import com.document.tool.SystemConfig;@Controllerpublic class ImageAgentController { private static final Logger LOG = LoggerFactory.getLogger(ImageAgentController.class); /** * ppt预览图片代理输出 * @throws IOException */ @RequestMapping("/preview/images/{year}/{month}/{md5id}/{preview}/{filename}.{ext}") public void cropImage(@PathVariable String year, @PathVariable String month, @PathVariable String md5id, @PathVariable String preview, @PathVariable String filename, @PathVariable String ext, HttpServletRequest request, HttpServletResponse response) throws IOException { // String rootDir = "/data03/ovp/blobs/"; String rootDir = SystemConfig.getBlobDirectory(); String oname = filename.substring(1, filename.length());// 原图文件名 String dirString = rootDir + year + "/" + month + "/" + md5id + "/" + oname + "." + ext; String targetFileString = rootDir + year + "/" + month + "/" + md5id + "/preview/" + filename + "." + ext; //如果原图存在 File originImage = new File(oname); if(originImage.exists()){ LOG.info("corpImage..." + dirString + " -> " + targetFileString); File newfile = new File(targetFileString); String pathString = newfile.getParent(); LOG.info("pathString...{} {}", pathString); File pathFile = new File(pathString); if (!pathFile.exists()) { LOG.info("---create file---"); pathFile.mkdirs(); } boolean status = ImageMagickUtils.scale(dirString, targetFileString, 240, 180); if (status) { response.reset(); response.setContentType("image/" + ext); java.io.InputStream in = new java.io.FileInputStream(targetFileString); // FilenameUrlUtils.getImageFilename(targetFileString); if (in != null) { byte[] b = new byte[1024]; int len; while ((len = in.read(b)) != -1) { response.getOutputStream().write(b); } in.close(); } } }else{ LOG.info("原图目录不存在-preview：{}",dirString); } } /** * ppt固定尺寸图片代理输出 * @throws IOException * http://document.polyv.net/images/2016/03/de37d2ceb11ac068c18c5e4428541075/jpg-3/1000x540.png * * http://document.polyv.net/images/2016/03/de37d2ceb11ac068c18c5e4428541075/jpg-3.png */ @RequestMapping("/images/{year}/{month}/{md5id}/{filename}/{width}x{height}.{ext}") public void cropfixedImage(@PathVariable String year, @PathVariable String month, @PathVariable String md5id, @PathVariable String filename, @PathVariable Integer width, @PathVariable Integer height, @PathVariable String ext, HttpServletRequest request, HttpServletResponse response) throws IOException { // String rootDir = "/data03/ovp/blobs/"; String rootDir = SystemConfig.getBlobDirectory(); //String oname = filename.substring(1, filename.length());// 原图文件名 String dirString = rootDir + year + "/" + month + "/" + md5id + "/" + ( filename + "." + ext); String targetFileString = rootDir + year + "/" + month + "/" + md5id + "/" + filename + "/" + (width + "x" + height + "." + ext); //如果原图存在 File originImage = new File(dirString); if(originImage.exists()){ File targetFileStringFile = new File(targetFileString); if(!targetFileStringFile.exists()){ LOG.info("corpImage..." + dirString + " -> " + targetFileString); File newfile = new File(targetFileString); String pathString = newfile.getParent(); LOG.info("pathString...{} {}", pathString); File pathFile = new File(pathString); if (!pathFile.exists()) { LOG.info("---create file---"); pathFile.mkdirs(); } ImageMagickUtils.resizeWH(dirString, targetFileString,width,height); } response.setContentType("image/" + ext); java.io.InputStream in = null; try{ in = new java.io.FileInputStream(targetFileString); response.setContentLength(in.available()); byte[] buffer = new byte[1024]; int count = 0; while ((count = in.read(buffer)) > 0) { response.getOutputStream().write(buffer, 0, count); } response.flushBuffer(); }catch(Exception e){ e.printStackTrace(); }finally { try { in.close(); } catch (Exception e) { } } }else{ LOG.info("原图目录不存在：{}",dirString); } } /** * 图片下载 */ @RequestMapping("get/image/data") public void downloadImage(HttpServletRequest request, HttpServletResponse response) throws IOException { String filePath = ServletRequestUtils.getStringParameter(request, "filePath", ""); //图片访问路劲 String fileName = ServletRequestUtils.getStringParameter(request, "fileName", ""); //名称 if(StringUtils.isNotBlank(filePath) || StringUtils.isNotBlank(fileName)){ String destUrl = filePath; //LOG.info("--------------"+filePath); String fileFormat=filePath.substring(filePath.lastIndexOf(".")); //String name=fileName.trim()+fileFormat; String name=filePath.substring(filePath.lastIndexOf("/")+1, filePath.length()); //File f = new File(filePath); //response.setHeader("Content-Disposition", "attachment; filename="+java.net.URLEncoder.encode(f.getName(),"UTF-8")); //LOG.info("--------------"+f.getName()); // 建立链接 URL url = new URL(destUrl); HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection(); // 连接指定的资源 httpUrl.connect(); // 获取网络输入流 BufferedInputStream bis = new BufferedInputStream(httpUrl.getInputStream()); Integer lenf=httpUrl.getContentLength(); //String lenf=this.getFileLength(4189053, 7189053); response.setContentType("application/x-msdownload"); response.setHeader("Content-Length", lenf.toString());//文件大小值5几M response.setHeader("Content-Disposition", "attachment; filename="+java.net.URLEncoder.encode(name,"UTF-8")); OutputStream out = response.getOutputStream(); byte[] buf = new byte[1024]; if (destUrl != null) { BufferedInputStream br = bis; int len = 0; while ((len = br.read(buf)) > 0){ out.write(buf, 0, len); } br.close(); } out.flush(); out.close(); } } } |
图片缩放的业务
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package com.document.tool;import java.io.IOException;import javax.swing.ImageIcon;import org.apache.commons.exec.CommandLine;import org.apache.commons.exec.DefaultExecuteResultHandler;import org.apache.commons.exec.DefaultExecutor;import org.apache.commons.exec.ExecuteException;import org.apache.commons.exec.ExecuteWatchdog;import org.apache.commons.exec.Executor;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 使用ImageMagick对图片文件进行处理的工具类。 * @author XingNing OU */public abstract class ImageMagickUtils { private static final String EXECUTABLE_CONVERT = "/usr/bin/convert"; // convert命令 private static final String EXECUTABLE_COMPOSITE = "/usr/bin/composite"; // composite命令 private static final long EXECUTE_TIMEOUT = 30 * 60 * 1000L; // 30 minutes private static final Logger LOG = LoggerFactory.getLogger(ImageMagickUtils.class); /** * 执行图片处理的命令。 * @param cmdLine 待执行的命令 * @return exitValue，一般等于0时表示正常运行结束 * @throws ExecuteException 命令执行失败时抛出此异常 * @throws IOException 当发生IO错误时抛出此异常 * @throws InterruptedException 当等待异步返回结果被中断时抛出此异常 */ public static int executeCommandLine(CommandLine cmdLine) throws ExecuteException, IOException, InterruptedException { Executor executor = new DefaultExecutor(); executor.setExitValue(0); // Kill a run-away process after EXECUTE_TIME milliseconds. ExecuteWatchdog watchdog = new ExecuteWatchdog(EXECUTE_TIMEOUT); executor.setWatchdog(watchdog); // Execute the print job asynchronously. DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler(); executor.execute(cmdLine, resultHandler); // Some time later the result handler callback was invoked. resultHandler.waitFor(); // So we can safely request the exit value. return resultHandler.getExitValue(); } /** * 按照高宽比例缩小图片。 * @param src 源图片 * @param dst 目标图片 * @param width 图片图片的宽度 * @param height 目标图片的高度 * @return 是否处理成功 */ public static boolean scale(String src, String dst, int width, int height) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-scale"); cmdLine.addArgument(width + "x" + height); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("缩略图片时发生异常，Cause: ", e); return false; } } /** * 按照高宽比例缩小图片。 * @param src 源图片 * @param dst 目标图片 * @param width 图片图片的宽度 * @param height 目标图片的高度 * @return 是否处理成功 */ public static boolean thumbnail(String src, String dst, int width, int height) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-thumbnail"); cmdLine.addArgument(width + "x" + height); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("缩略图片时发生异常，Cause: ", e); return false; } } /** * 添加图片水印。 * @param src 源图片 * @param dst 目标图片 * @param logofile 水印图片 * @param dissolve 和水印的融合度,0-100的数字 * @param gravity 叠放方向,East,West,North,South,NorthEast,NorthWest,SouthEast,SouthWest * @return 是否处理成功 */ public static boolean drawLogo(String src, String dst, String logofile, int dissolve, String gravity) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_COMPOSITE); cmdLine.addArgument("-dissolve"); cmdLine.addArgument(dissolve + "%"); cmdLine.addArgument("-gravity"); cmdLine.addArgument(gravity); cmdLine.addArgument(logofile); cmdLine.addArgument(src); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("添加图片水印时发生异常，Cause: ", e); return false; } } /** * 添加图片水印。 * @param src 源图片 * @param dst 目标图片 * @param logofile 水印图片 * @param dissolve 和水印的融合度,0-100的数字 * @param x 水印距离左下角的距离 * @param y 水印距离右下角的距离 * @return 是否处理成功 */ public static boolean drawLogo(String src, String dst, String logofile, int dissolve, int x, int y) { ImageIcon icon = new ImageIcon(src); int width = icon.getIconWidth(); // 源图的宽 int height = icon.getIconHeight(); // 源图的高 String _x = String.valueOf(width - x); // 在x轴上水印图片的左上顶点距离图片左上角的距离 String _y = String.valueOf(height - y); // 在y轴上水印图片的左上顶点距离图片左上角的距离 // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_COMPOSITE); cmdLine.addArgument("-dissolve"); cmdLine.addArgument(dissolve + "%"); cmdLine.addArgument("-geometry"); cmdLine.addArgument(_x + "+" + _y); cmdLine.addArgument(logofile); cmdLine.addArgument(src); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("添加图片水印时发生异常，Cause: ", e); return false; } } /** * 裁剪图片。 * @param src 源图片 * @param dst 目标图片 * @param width 目标宽度 * @param height 目标高度 * @param left 裁剪位置：距离左边的像素 * @param top 裁剪位置：距离上边的像素 * @return 是否处理成功 */ public static boolean crop(String src, String dst, int width, int height, int left, int top) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-crop"); cmdLine.addArgument(width + "x" + height + "+" + left + "+" + top); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("裁剪图片时发生异常，Cause: ", e); return false; } } /** * 获取矩形的小图。 * @param src 源图片 * @param dst 目标图片 * @param width 目标宽度 * @param height 目标高度 * @param left 裁剪位置：距离左边的像素 * @param top 裁剪位置：距离上边的像素 * @return 是否处理成功 */ public static boolean cropRect(String src, String dst, int width, int height, int left, int top) { ImageIcon icon = new ImageIcon(src); int origWidth = icon.getIconWidth(); int origHeight = icon.getIconHeight(); int[] s = new int[2]; if (origWidth < origHeight) { // 以宽为标准 s = getSize(origWidth, origHeight, width, height, 1); } else {// 以高为标准 s = getSize(origWidth, origHeight, width, height, 2); } if (thumbnail(src, dst, s[0], s[1])) { return crop(src, dst, width, height, left, top); } return false; } /** * 加边框。 * @param src 源图片 * @param dst 目标图片 * @param borderWidth 边框的宽度 * @param borderHeight 边框的高度 * @param borderColor 边框的颜色 * @return 是否处理成功 */ public static boolean border(String src, String dst, int borderWidth, int borderHeight, String borderColor) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument("-bordercolor"); cmdLine.addArgument(borderColor); cmdLine.addArgument("-border"); cmdLine.addArgument(borderWidth + "x" + borderHeight); cmdLine.addArgument(src); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("加图片边框时发生异常，Cause: ", e); return false; } } /** * 转换图片格式。 * @param src 源图片 * @param dst 目标图片 * @param format 转换的格式 * @return 是否处理成功 */ public static boolean format(String src, String dst, String format) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-format"); cmdLine.addArgument("'" + format + "'"); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("转换图片格式时发生异常，Cause: ", e); return false; } } /** * 转换无限极的TIFF图片。 */ public static boolean convertTiff(String src, String dst) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-colorspace"); cmdLine.addArgument("RGB"); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("转换图片格式时发生异常，Cause: ", e); return false; } } /** * 获得要压缩图片的大小。 * @param w 图片的原宽度 * @param h 图片的原高度 * @param width 标准宽 * @param height 标准高 * @param type 类型 1-以宽为标准压缩 2-以高为标准压缩 3-以比例大小压缩 * @return size[0]-要压缩的宽度， size[1]-要压缩的高度 */ public static int[] getSize(double w, double h, double width, double height, int type) { if (w < width) {// 如果原宽度比标准宽度小 width = w; } if (h < height) {// 如果原高度比标准高度小 height = h; } double scale = w / h; switch (type) { case 1: height = width / scale; break; case 2: width = height * scale; break; case 3: if (width / height > scale) { width = height * scale; } else if ((width / height) < scale) { height = width / scale; } break; } int[] size = new int[2]; size[0] = (int) width; size[1] = (int) height; return size; } /** * 指定宽度。 * @param src * @param width * @param dst */ public static boolean resize(String src, int width, String dst) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-resize"); cmdLine.addArgument(width + ""); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("缩略图片时发生异常，Cause: ", e); return false; } } /** * 指定宽度、高度。 * @param src * @param width * @param dst */ public static boolean resizeWH(String src,String dst, int width, int height ) { // 构建命令 CommandLine cmdLine = new CommandLine(EXECUTABLE_CONVERT); cmdLine.addArgument(src); cmdLine.addArgument("-resize"); cmdLine.addArgument(width + "x" + height +"!"); cmdLine.addArgument(dst); try { executeCommandLine(cmdLine); return true; } catch (Exception e) { LOG.error("缩略图片时发生异常，Cause: ", e); return false; } }} |
服务器上要安装imagemagick。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
