##微服务screenshots说明档

• 微服务名: screenshots

• Python3 + Flask + Selenium + PhantomJS http screenshot service

• return code

  • ok
  • error

• 尽量遵循pep8

• scribe日志格式

  • SCRIBE_CATEGORY='screenshot'
  • scribe_msg = '\01'.join([str(ntime()),HOSTNAME,SCRIBE_CATEGORY,runtime,'0',source])

• 依赖

  • 域名依赖
    • http://127.0.0.1/screenshot
  • 服务依赖
    • phantomjs 版本2.1.1
    • Python 版本 3.5.3 3.5.2 测试通过
    • redis 3.2.3 测试通过
  • 服务启动方式
    • /etc/init.d/redis start
    • python screenshot_daemon.py start
    • python /usr/bin/gunicorn -w 4 -b 0.0.0.0:80 screenshot_http:app

• 调用说明

  • 该服务约定根据url的md5值存放到路径
  • /data0/moosefs/client/screenshots/ + 前两位md5 + / + url md5 + .png
  • save_pwd = SCREENSHOT_DIR + '/' + str(md5encode(url))[0:2] + '/' + str(md5encode(url)) + '.png'
    • 请求参数说明,请求方式为post 格式为json 参数有两个
      • url "http://www.baidu.com"
      • cut 1000,560,0,0

width = cut.split(",")[0]  宽
height= cut.split(",")[1] 高
x = cut.split(",")[2] 起点x轴坐标
y = cut.split(",")[3] 起点y轴坐标

- 请求案例

curl -X POST \
  http://127.0.0.1/screenshot \
  -H 'cache-control: no-cache' \
  -H 'content-type: application/json' \
  -d '{
        "lists": [
            {
                "url": "http://www.qq.com",
                "cut": "1000,560,0,0"
            },
            {
                "url": "http://www.baidu.com",
                "cut": "1920,1080,0,0"
            }         
        ]
}'

• screenshot_flow

• cat /etc/supervisord.conf

[unix_http_server]
file=/tmp/supervisor.sock   ; (the path to the socket file)
[supervisord]
logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
logfile_maxbytes=100MB        ; (max main logfile bytes b4 rotation;default 50MB)
logfile_backups=10           ; (num of main logfile rotation backups;default 10)
loglevel=info                ; (log level;default info; others: debug,warn,trace)
pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
nodaemon=false               ; (start in foreground if true;default false)
minfds=1024                  ; (min. avail startup file descriptors;default 1024)
minprocs=200                 ; (min. avail process descriptors;default 200)
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket
[program:screenshot]
command = gunicorn -w 4 -b 0.0.0.0:80 screenshot_http:app
directory=/opt/screenshots/
autostart=true
autorestart=true
startsecs=1
stderr_logfile=/opt/screenshots/logs/http_server.log
stdout_logfile=/opt/screenshots/logs/http_server.log

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