# openresty-picture-processing

**Repository Path**: midoks/openresty-picture-processing

## Basic Information

- **Project Name**: openresty-picture-processing
- **Description**: Openresty Picture processing 
- **Primary Language**: Lua
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-04-18
- **Last Updated**: 2022-05-25

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

### 说明

### DOCKER 常用操作
```
docker build -t midoks/openresty-image-screenshot:1.0 .

docker run -d -p 1010:80 --name openresty-image-screenshot midoks/openresty-image-screenshot:1.0

docker exec -it openresty-image-screenshot /bin/bash

docker rm -f $(docker ps -a -q)

tail -f /usr/local/openresty/nginx/logs/error.log
tail -f /usr/local/openresty/nginx/logs/access.log

/bin/openresty -c /usr/local/openresty/nginx/conf/nginx.conf
sudo sed '/^ *#/d' /usr/local/openresty/nginx/conf/nginx.conf
```

### 前期准备
- 依赖[centos7](https://github.com/midoks/docker-learning/tree/master/centos7)
- 部分可以查看Dockerfile文件
- 还需要下载[opencv](https://github.com/opencv/opencv/archive/2.4.9.tar.gz)


### 图片格式说明

- 格式装换支持[jpg|gif|webp|png]

```
http://127.0.0.1:1010/image/img1.jpg_.webp
```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_\.(jpg|jpeg|gif|png|webp)$ {
	...
	rewrite_by_lua_file $document_root/format.lua;
}
```

- 图片质量装换[jpg|gif|webp|png]

```
http://127.0.0.1:1010/image/img1.jpg_q90.webp
```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_c(\d+)x(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	...
	rewrite_by_lua_file $document_root/quality.lua;
}
```


- 图片缩放 
```
1: ''填充后保证等比缩图
2: _ 等比缩图
3: ! 非等比缩图，按给定的参数缩图(缺点：长宽比会变化)
4: ^ 裁剪后保证等比缩图 (缺点：裁剪了图片的一部分)
5: > 只缩小不放大
6: $ 限制宽度，只缩小不放大(比如网页版图片用于手机版时)
```

```
http://127.0.0.1:1010/image/img1.jpg_1@100x100.jpg
http://127.0.0.1:1010/image/img1.jpg_2@100x100q90.jpg

```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_(\d+)@(\d+)x(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/thumb.lua;
}

location ~* ^(.+\.(jpg|jpeg|gif|png))_(\d+)@(\d+)x(\d+)q(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/thumb.lua;
}

```


- 截图功能
```
http://127.0.0.1:1010/image/img1.jpg_t100x100.jpg
http://127.0.0.1:1010/image/img1.jpg_t100x100q90.jpg
```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_t(\d+)x(\d+)\.(jpg|jpeg|gif|png|webp)$
	rewrite_by_lua_file $document_root/tclip.lua;
}

location ~* ^(.+\.(jpg|jpeg|gif|png))_t(\d+)x(\d+)q(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/tclip.lua;
}
```

- 代理图片

```
http://127.0.0.1:1010/(代理地址URI)_c100x100.jpg
```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_c(\d+)x(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/curl.lua;
}

location ~* ^(.+\.(jpg|jpeg|gif|png))_c(\d+)x(\d+)q(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/curl.lua;
}
```

- 固定格式

```
http://127.0.0.1:1010/image/img1.jpg_f100x100.jpg
```

```
location ~* ^(.+\.(jpg|jpeg|gif|png))_f(\d+)x(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/thumb_fixed.lua;
}

location ~* ^(.+\.(jpg|jpeg|gif|png))_f(\d+)x(\d+)q(\d+)\.(jpg|jpeg|gif|png|webp)$ {
	rewrite_by_lua_file $document_root/thumb_fixed.lua;
}
```