nginx上传错误413 Request Entity Too Large解决

问题背景：app上传图片提示413 Request Entity Too Large。

原因：前端采用的是nginx反向代理，默认client_max_body_size大小是1M，如果图片大于1M就报错了

解决方案 ：

    在http或者server或者location标签添加

    client_max_body_size 20m;

官方说明：

client_max_body_size 1m;

Sets the maximum allowed size of the client request body, specified in the “Content-Length” request header field. If the size in a request exceeds the configured value, the 413 (Request Entity Too Large) error is returned to the client. Please be aware that browsers cannot correctly display this error. Setting size to 0 disables checking of client request body size.