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ClownFish / image2webp

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README
Apache-2.0

介绍

Image2webp项目是使用golang编写的支持多种图片格式实时转码成Webp格式的图片的应用程序。

目前支持JPG,JPEG, PNG, BMP, GIF 这些格式转码成Webp格式。

Webp格式能够在不影响图片质量的情况下显著的缩小图片体积,从而提升网络传输的速度,节省带宽流量资源。

本项目还支持Webp格式的缩略图功能,也是实时转码,能够无侵入的配置到现有服务器中,只需要在nginx中做一些转发,不用更改任何其他逻辑。

最佳实践

本项目的最佳实现是在图片服务器中启动本服务,在nginx或者其他web服务器中配置转发, 只需要匹配^(.+)_webp(_(\d+)_(\d+)(.*))?$ 这个url格式就能转发到image2webp程序中,从而输出webp格式的图片。

如果是前端访问图片,在请求量很大的时候,这种实时转码的方式会造成cpu性能不足,所以针对大请求量的情况, 可以选择开启缓存,设置缓存目录,生成的webp文件会写入该目录。 把cdn图片缓存有效期设置的长一点,本服务只是回源使用,那样就很完美了。

编译

编译是非常简单的,确保你的go版本是1.16以上,并且打开了mod的支持。

执行make 命令就自动编译好了. 当然你也可以手动执行全路径编译命令

$ go build -v -o image2webp

编译成功后,你可以执行

$ ./image2webp start --config=./config.json

启动它

配置

config.json 中是json格式的配置.

  • addr 监听的地址与端口 "127.0.0.1:8563"
  • storagePath 图片存储的目录
  • quality 转码成webp时的图片质量百分比 默认是80%
  • allowSizes 支持的缩略图格式,_50_50: _width_height
  • enableTmpFile 开启图片缓存
  • tmpStoragePath 图片缓存的目录

部署

image2webp 部署也是很方便的,只需要把编译的二进制文件直接放到服务器上去运行, 再配置一下前端代理,具体可以参考nginx.conf

部署好后的效果如下:

  • 原图片地址: http://image.example.com/images/timg.jpeg
  • webp格式图片地址: http://image.example.com/images/timg.jpeg_webp
  • webp缩略图格式地址: http://image.example.com/images/timg.jpeg_webp_100_100

感谢

  • 本项目是基于DMicro框架开发.
  • 本项目是基于Go Frame框架开发.
  • 参考项目webp_server_go
  • 感谢提供了各种图片转换库的项目,大家可以看源码库的引用。
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简介

Image2webp项目是使用golang编写的支持多种图片格式实时转码成Webp格式的图片的应用程序。目前支持JPG,JPEG, PNG, BMP, GIF 这些格式转码成Webp格式 展开 收起
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