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七牛同步工具-Python

2016 年 11 月 13 日 • 阅读: 522 • 折腾

最近在写一个基于七牛云的相册,用七牛的后台上传图片总是会有不方便。所以这里去官方的SDK趴了一个轮子,方便以后上传和同步下载文件。

当然是基于Python的,因为个人比较喜欢Python。下面就贴上代码:

#!/usr/bin/env python
#-*- coding:utf-8 -*-
# 
# 上传代码 python qiniusync.py
# 下载代码 python qiniusync.py down

import qiniu
from qiniu import Auth
from qiniu import BucketManager
import os
import re
import urllib2
import sys

access_key = ''
secret_key = ''
bucket_name = ''
bucket_domain = ''

q = Auth(access_key, secret_key)
bucket = BucketManager(q)
basedir=os.path.realpath(os.path.dirname(__file__))
#同步目录
#basedir=""
filename=__file__
ignore_paths=[filename,"{0}c".format(filename)]
ignore_names=[".DS_Store",".git",".gitignore"]
charset="utf8"
diff_time=2*60


def list_all(bucket_name, bucket=None, prefix="", limit=100):
    rlist=[]
    if bucket is None:
        bucket = BucketManager(q)
    marker = None
    eof = False
    while eof is False:
        ret, eof, info = bucket.list(bucket_name, prefix=prefix, marker=marker, limit=limit)
        marker = ret.get('marker', None)
        for item in ret['items']:
            rlist.append(item["key"])
    if eof is not True:
        # 错误处理
        #print "error"
        pass
    return rlist

def get_files(basedir="",fix="",rlist=None,ignore_paths=[],ignore_names=[]):
    if rlist is None:
        rlist=[]
    for subfile in os.listdir(basedir):
        temp_path=os.path.join(basedir,subfile)
        tp=os.path.join(fix,subfile)
        if tp in ignore_names:
            continue
        if tp in ignore_paths:
            continue
        if os.path.isfile(temp_path):
            rlist.append(tp)
        elif os.path.isdir(temp_path):
            get_files(temp_path,tp,rlist,ignore_paths,ignore_names)
    return rlist

def get_valid_key_files(subdir=""):
    basedir=subdir or basedir
    files = get_files(basedir=basedir,ignore_paths=ignore_paths,ignore_names=ignore_names)
    return map(lambda f:(f.replace("\\","/"),f),files)


def sync():
    qn_keys=list_all(bucket_name,bucket)
    qn_set=set(qn_keys)
    l_key_files=get_valid_key_files(basedir)
    k2f={}
    update_keys=[]
    u_count=500
    u_index=0
    for k,f in l_key_files:
        k2f[k]=f
        str_k=k
        if isinstance(k,str):
            k=k.decode(charset)
        if k in qn_set:
            update_keys.append(str_k)
            u_index+=1
            if u_index > u_count:
                u_index-=u_count
                update_file(k2f,update_keys)
                update_keys=[]
        else:
            # upload
            upload_file(k,os.path.join(basedir,f))
    if update_keys:
        update_file(k2f,update_keys)
    print "sync end"

def update_file(k2f,ulist):
    ops=qiniu.build_batch_stat(bucket_name,ulist)
    rets,infos = bucket.batch(ops)
    for i in xrange(len(ulist)):
        k=ulist[i]
        f=k2f.get(k)
        ret=rets[i]["data"]
        size=ret.get("fsize",None)
        put_time = int(ret.get("putTime")/10000000)
        local_size=os.path.getsize(f)
        local_time=int(os.path.getatime(f))
        if local_size==size:
            continue
        if put_time >= local_time - diff_time:
            # is new
            continue
        # update
        upload_file(k,os.path.join(basedir,f))

def upload_file(key,localfile):
    print "upload_file:"
    print key
    token = q.upload_token(bucket_name, key)
    params = {'x:a': 'a'}
    progress_handler = lambda progress, total: progress
    ret, info = qiniu.put_file(token, key, localfile, params, progress_handler=progress_handler)

def down_file(key,basedir="",is_private=1,expires=3600):
    if isinstance(key,unicode):
        key=key.encode(charset)
    url = 'http://%s/%s' % (bucket_domain, key)
    if is_private:
        url=q.private_download_url(url, expires=expires)
    c=urllib2.urlopen(url)
    fpath=key.replace("/",os.sep)
    savepath=os.path.join(basedir,fpath)
    dir_=os.path.dirname(savepath)
    if not os.path.isdir(dir_):
        os.makedirs(dir_)
    elif os.path.isfile(savepath):
        os.remove(savepath)
    f = file(savepath, 'wb')
    f.write(c.read())
    f.close()

def down_all(prefix=""):
    import traceback
    for key in list_all(bucket_name,bucket,prefix=prefix):
        try:
            down_file(key,basedir=basedir)
            print "down:\t"+key
        except:
            print "error down:\t"+key
            print traceback.format_exc()
    print "down end"


def main():
    if len(sys.argv)>1:
        if sys.argv[1]=="down":
            prefix=len(sys.argv)>2 and sys.argv[2] or ""
            down_all(prefix=prefix)
            return
    sync()

if __name__=="__main__":
    main()

使用方法

如何使这个轮子滚起来呢?

安装七牛的Python SDK

可以直接pip install qiniu或者直接从七牛的github下载后安装python setup.py install

填写基本信息

把本文上面贴着的代码直接考到本地保存为qiniusync.py后,代码中会有4个地方需要填写

access_key = ''
secret_key = ''
bucket_name = ''
bucket_domain = ''

运行

填上基本的信息后,就可以运行了。

同步上传:python qiniusync.py
下载:python qiniusync.py down

标签: python, 七牛
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