问题
我想将打印作业从 python 脚本发送到在“Google 云打印”中注册的打印机。
我认为我需要什么
Google 帐户
Google 云 API 注册:客户端 ID、客户端密码(用于获取我的访问 token )
访问 token
我通过使用本教程获得了访问 token :
https://github.com/burnash/gspread/wiki/How-to-get-OAuth-access-token-in-console%3F
到目前为止我已经尝试过
由于 Bradley Ayers 正是为此目的编写了一个名为 cloudprinting ( https://github.com/bradleyayers/cloudprinting ) 的 python 库,因此以下脚本旨在处理我的打印作业:
from cloudprinting import *
access_token = 'xyz_token_xyz' # here my personal access token is stated
auth = OAuth2(access_token, token_type="Bearer")
r = submit_job(printer="e506d12-dbe0-54d3-7392-fd69d45ff2fc", content="some_pdf_in_local_directory.pdf", auth=auth)
虽然脚本完成时没有错误消息,但它不起作用 - 这意味着最后没有打印作业。
因此,我尝试提出自己的尝试:将 http 发布到 Google 云打印:
import requests
import json
access_token = 'xyz_acces_token_xyz' # here my personal access token is stated
printer = "e506d12-dbe0-54d3-7392-fd69d45ff2fc" # random printer_id
capabilities = [{}]
data = {"printerid": printer,
"title": "name",
"contentType": "pdf",
"capabilities": json.dumps({"capabilities": capabilities})}
post_request = requests.post('https://www.google.com/cloudprint/submit', headers={'Authorization': access_token},data=data,files='some_pdf_in_local_directory.pdf')
print (post_request.text)
显然上面的 requests.post() 参数不正确。我需要以什么方式说明哪些参数? 或者更具体地说:
- 是 '' https://www.google.com/cloudprint/submit ' 正确的端点?
- 正确的身份验证方式是什么?
- 变量“data”需要什么参数值对?
任何想法都值得赞赏。提前致谢!
最佳答案
如果有人仍然有兴趣使用本教程获取访问 token ,我还可以使用 print(credentials.refresh_token) 获取刷新 token ,我编写了一个可以打印的类,并在需要时刷新 token 。 我可以在我的云打印机中成功地从 python 进行打印,您还必须将范围更改为“https://www.googleapis.com/auth/cloudprint ”
希望对你有帮助
class CloudPrint():
def __init__(self,client_id=None, client_secret=None, access_token = None, refresh_token = None):
self.client_id = client_id
self.client_secret= client_secret
self.access_token = access_token
self.refresh_token = refresh_token
self.deadline = time.time()-1
self.api_url ='https://www.google.com/cloudprint/submit'
def safe_check(self):
if time.time()>float(self.deadline):
self.refresh()
def refresh(self):
print('google refreshing')
token = requests.post(
'https://accounts.google.com/o/oauth2/token',
data={
'client_id': self.client_id,
'client_secret': self.client_secret,
'grant_type': 'refresh_token',
'refresh_token': self.refresh_token,
}
)
self.access_token = token.json()['access_token']
self.deadline = self.deadline + token.json()['expires_in']
print('new deadline ', self.deadline)
def print(self, file, title, printerids):
self.safe_check()
body = {"printerid":printerids,
"title":[title],
"ticket":"{\r\n \"version\": \"1.0\",\r\n \"print\": {}\r\n}",
}
files = {'content': open(file,'rb')}
headers = {"Authorization":"Bearer "+str(self.access_token)}
print(headers)
r = requests.post(self.api_url, data=body, files=files, headers=headers)
print(r.url)
print(r.text)
if __name__ == '__main__':
gcp = CloudPrint(CLIENT_ID, CLIENT_SECRET, refresh_token=REFRESH_TOKEN)
gcp.print('prueba.txt', 'prueba', PRINTER_ID_DEB)
关于python - 将打印作业从python发送到谷歌云打印,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44439586/