Nginx代理输出缩放图片的方法

  # 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;     }    }    }

  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;    @Controller  public 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();     }     }     }

  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;    }   }  }