宝塔设置图片跨域和canvas的图片跨域

宝塔设置图片跨域

add_header Access-Control-Allow-Origin *;
add_header Access-Control-Allow-Headers X-Requested-With;
add_header Access-Control-Allow-Methods GET,POST,OPTIONS;

实例网站配置文件

server
{
    listen 80;
    server_name admin.weixuegu.cn www.weixuegu.cn;
    index index.php index.html index.htm default.php default.htm default.html;
    root /www/wwwroot/admin.weixuegu.cn/public;
    
    #SSL-START SSL相关配置，请勿删除或修改下一行带注释的404规则
    #error_page 404/404.html;
    #SSL-END
    
    #ERROR-PAGE-START  错误页配置，可以注释、删除或修改
    #error_page 404 /404.html;
    #error_page 502 /502.html;
    #ERROR-PAGE-END
    
    #PHP-INFO-START  PHP引用配置，可以注释或修改
    include enable-php-73.conf;
    #PHP-INFO-END
    
    #REWRITE-START URL重写规则引用,修改后将导致面板设置的伪静态规则失效
    include /www/server/panel/vhost/rewrite/admin.weixuegu.cn.conf;
    #REWRITE-END
    
    #禁止访问的文件或目录
    location ~ ^/(\.user.ini|\.htaccess|\.git|\.svn|\.project|LICENSE|README.md)
    {
        return 404;
    }
    
    #一键申请SSL证书验证目录相关设置
    location ~ \.well-known{
        allow all;
    }
    
 
      location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires      30d;
        error_log off;
        access_log /dev/null;
        add_header Access-Control-Allow-Origin *;
		add_header Access-Control-Allow-Headers X-Requested-With;
		add_header Access-Control-Allow-Methods GET,POST,OPTIONS;

    }
    
    location ~ .*\.(js|css)?$
    {
        #expires      12h;
        error_log off;
        access_log /dev/null; 
    }
    access_log  /www/wwwlogs/admin.weixuegu.cn.log;
    error_log  /www/wwwlogs/admin.weixuegu.cn.error.log;
}

前端生成代码

<canvas width=200 height=200 id="thecanvas"></canvas> 
<script> 
 var url = "http://admin.weixuegu.cn/uploads/20201020/514939f37dc2381fb602abea4f596a81.jpg";
        var canvas = document.createElement("canvas");
        var ctx = canvas.getContext('2d');
 
        canvas.width = 100;
        canvas.height = 100;
        var img = new Image();
        //设置图片跨域访问
        img.crossOrigin = 'anonymous';
        img.src = url;
        document.body.appendChild(img);
        img.onload = function () {
            ctx.drawImage(this,0,0,100,100);
            var base64 = canvas.toDataURL('image/jpg', 1);
            console.log(base64)
        };

</script>