具体报错为：

Access to fetch at ‘http://172.27.103.7/G1/M00/00/44/rBtnB2LWJ5aAfsvXAA0Hygi9iws872.pdf’ from origin ‘http://172.27.101.43:10000’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.
pdf.js:26403

报错如上图所示

解决方案

nginx.conf中添加代理

 location /dijz-pdf/{
            proxy_pass   http://172.27.103.7/;
        }

前端得到的pdf路径进行修改

即dijz-pdf这一部分或者**/dijz-pdf**和斜扛之前（包括dijz-pdf）的将会被 **http://172.27.103.7/**替换掉