Question

问题

我想将一个打印作业从python脚本发送到在“Google Cloud Print”中注册的打印机。

我认为我需要这个

google account
google cloud api registration：client-id，client-secret（获取访问令牌）
访问令牌

我使用本教程获得了访问令牌：

https://github.com/burnash/gspread/wiki/How-to-get-OAuth-access-token-in-console%3F

到目前为止我尝试了什么

由于布拉德利艾尔斯为此目的写了一个名为cloudprinting（https://github.com/bradleyayers/cloudprinting）的python库，以下脚本是为了处理我的打印工作：

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)

尽管脚本没有错误消息但它不起作用 - 这意味着最后没有打印作业。

所以我尝试将自己尝试 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。我需要以哪种方式说明哪些参数？或者更具体地说：

'https://www.google.com/cloudprint/submit'是正确的终点吗？
正确的身份验证方式是什么？
变量'data'需要什么参数 - 值对？

任何想法都表示赞赏。提前谢谢！

Answer 1

如果有人仍然对使用该教程获取访问令牌感兴趣，我也可以使用print（credentials.refresh_token）获取刷新令牌，我写了一个打印的类，并在需要时刷新令牌。我可以在我的云打印机中成功地从python打印，你也必须将范围改为“https://www.googleapis.com/auth/cloudprint”

希望有所帮助

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)

将打印作业从python发送到谷歌云打印

1 个答案: