ImageServer

Dependencies

ImageServer depends on flask, celery, redis, PIL, memcache, requests and Beansdb. You should make sure those components avaliable before using ImageServer.

pip install cython
pip install -r requirements.txt

Run

1. You need to setup Beansdb before use ImageServer.

    beansdb -p 7901 -d -P/tmp/beansdb1.pid -L/tmp/beansdb1.log -H /home/gfreezy/beans/db/db1 -vv
    beansdb -p 7902 -d -P/tmp/beansdb2.pid -L/tmp/beansdb2.log -H /home/gfreezy/beans/db/db2 -vv
   

2. Customize settings.

   Rename sample_config.py to config.py.

3. Run Server

   Run the following commands in the directory of ImageServer.

    $ python run.py
   

   If you want ImageServer to auto synchronise your images to BaiduYun, start celery first. Run the command in a new shell.

    $ celery worker -A simpleserver.init
   

API

• POST /upload Upload image

    Form:
      image: Image string
      sizes(optional): 100x50,150x<60 (widthxheight or widthx<height)
      ident(optional): the ident to upload to
      callback: after syncing to bdyun, GET callback
      sync: whether sync to baiduyun
  
    Response:
    {
        "content": {
            "ident": "1c449b644ab111e3937900163e200a0a",
            "sizes": [
                ["100", "50"],
                ["150", "<60"]
            ]
        },
        "status": "ok"
    }
  

• POST /sync/<ident>.jpg Sync image

    Form:
      sizes(optional): 100x50,150x<60 (widthxheight or widthx<height)
      callback: after syncing to bdyun, GET callback
  
    Response:
    {
        "content": {
            "ident": "1c449b644ab111e3937900163e200a0a",
            "sizes": [
                ["100", "50"],
                ["150", "<60"]
            ]
        },
        "status": "ok"
    }
  

• POST /resize/<ident>.jpg Resize image

    Form:
      sizes(optional): 100x50,150x<60
      callback: after syncing to bdyun, GET callback
      sync: true or false
  
      widthxheight or widthx<height
  
    Response:
    {
        "content": {
            "ident": "1c449b644ab111e3937900163e200a0a",
            "sizes": [
                ["100", "50"],
                ["150", "<60"]
            ]
        },
        "status": "ok"
    }
  

• GET /image/<ident>.jpg Visit image

    /image/1c449b644ab111e3937900163e200a0a.jpg?width=50&height=0
    /image/1c449b644ab111e3937900163e200a0a.jpg?width=50&height=<50
    /image/1c449b644ab111e3937900163e200a0a.jpg
  

Performance Tuning

Add the following config to your nginx config. Nginx will cache the images.

proxy_cache_path /var/www/cache levels=1:2 keys_zone=imageservice:10m max_size=1g inactive=24h;
proxy_temp_path /var/www/cache/tmp;
log_format imageservice
    '$remote_addr '
    '"$request" $status $bytes_sent '
    '"$http_referer" "$http_user_agent" "$gzip_ratio" '
    '$upstream_addr $upstream_cache_status';


server {
    listen 8000;

    location / {
        proxy_pass http://localhost:8001;
    }

    location /image {
        proxy_pass http://localhost:8001;
        proxy_cache imageservice;
        proxy_cache_valid 200 1d;
        access_log /var/log/nginx/imageservice.log imageservice;
    }

}