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：
# 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
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();
}
}
}
