使用requests 库上传文件遇到的坑

在将文件上传到对象存储时，验证 token 都是成功的，但是上传的文件一直打不开，一开

始我是这样写的上传的:

url = requestaddress+'/'+bucketname+'/'+objectname

files = {'file': open(filepath,'rb')}

r = requests.post(url,params=querystring,headers=headers,files=files)

print(r.json())

但是上传后的文件一直打不开。抓包查看请求数据，发现会带有

--94642781300f420a8263e3833d1965cb..Content-Disposition: form-data; name="file"; filename="test.jpg"
8....jU'.h..d..4TnJ.........--94642781300f420a8263e3833d1965cb--..

这些数据

看了requests 的官网的文档说是强烈推荐使用二进制方式上传文件，因为

于是使用with open 打开文件后上传

with open(filepath, 'r') as f:

        r = requests.post(url,params=querystring,headers=headers,data=f)

        print(r.json())

结果发现可以

附上传代码

#!/usr/bin/python
# -*- coding: utf-8 -*-

import base64
import hmac
import hashlib
import time
import requests
import json
import datetime


# 计算token


def token(accesskey,secretkey,bucketname,objectname):

    expirestime = int(time.time()+6000)

    json_data = {"Bucket":bucketname,"Object":objectname,"Expires":expirestime}

    putpolicy = json.dumps(json_data)

    encodedputpolicy = base64.b64encode(putpolicy)

    signature = hmac.new(secretkey, encodedputpolicy, digestmod=hashlib.sha256).digest();

    encodedsign = base64.b64encode(signature)

    token = "UPLOAD " + accesskey + ":" + encodedsign + ":" + encodedputpolicy

    return token

# 获取最佳节点

def getnode(bucketname):

    url ='http://lbs-eastchina1.126.net/lbs?version=1.0'+'&bucketname='+bucketname

    node = requests.get(url)

    nodeValue= node.json()

    return nodeValue['upload'][0]

# 分块上传

def postfile(xnostoken,bucketname,
            objectname,offset,
            complete,host,contentlength,
            contenttype,filepath):
    gmtformat = '%a, %d %b %Y %H:%M:%S GMT'
    gmtdate = datetime.datetime.utcnow().strftime(gmtformat)
    querystring = {"offset":offset,"complete":complete,"version":1.0}

    headers = {'Host':host,'Content-Length':contentlength,
            'x-nos-token':xnostoken,'Content-type':contenttype,'Date':gmtdate}

    requestaddress = getnode(bucketname)

    requestaddress = str(requestaddress)

    url = requestaddress+'/'+bucketname+'/'+objectname

    with open(filepath, 'r') as f:

        requestapi = requests.post(url,params=querystring,headers=headers,data=f)

        print(requestapi.json())

def main():

    bucketname = 'netease01'

    objectname = '3.jpg'

    accesskey = ""

    secretkey = ""

    offset = 0

    complete = True

    host = 'nos-eastchina1.126.net'

    contenttype = 'image/jpeg'

    contentlength = '34771'

    filepath = '/Users/wenjun/PycharmProjects/Test/test.jpg'

    xnostoken = token(accesskey,secretkey,bucketname,objectname)

    postfile(xnostoken,bucketname,objectname,offset,complete,host,contentlength,contenttype,filepath)


if __name__ == '__main__':

    main()