Nginx代理輸出縮放圖片怎麼實現

nginx 設定檔：

# 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;
   }
  }

}

代理程式輸出縮放圖片

r​​rreee

圖片縮放的業務

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
  * https://cache.yisu.com/upload/ask_collection/20210726/113/19154.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(); 
  }

 } 

}

伺服器上要安裝imagemagick。

以上是Nginx代理輸出縮放圖片怎麼實現的詳細內容。更多資訊請關注PHP中文網其他相關文章！