尝试从 Scrapy 管道将爬行数据写入 Bigquery 时，请求的身份验证范围不足 (403)

Question

我正在尝试构建 Scrapy 爬虫：蜘蛛将爬取数据，然后在 pipeline.py 中，数据将保存到 Bigquery。我通过 docker 构建它，设置 crontab 作业并推送到 Google 云服务器到每天运行ning.

问题是crontab执行scrapy爬虫的时候，得到了"google.api_core.exceptions.Forbidden: 403 GET https://www.googleapis.com/bigquery/v2/projects/project_name/datasets/dataset_name/tables/table_name: Request had insufficient authentication scopes."。

更多细节，当访问它的容器时（docker exec -it ... /bin/bash）并手动执行它（scrapy crawl spider_name），它就像魅力一样。数据出现在 Bigquery 中。

我使用具有 bigquery.admin 角色的服务帐户（json 文件）来设置 GOOGLE_APPLICATION_CREDENTIALS。

# spider file is fine

# pipeline.py
from google.cloud import bigquery
import logging
from scrapy.exceptions import DropItem
...

class SpiderPipeline(object):
    def __init__(self):

        # BIGQUERY
        # Setup GOOGLE_APPLICATION_CREDENTIALS in docker file
        self.client = bigquery.Client()
        table_ref = self.client.dataset('dataset').table('data')
        self.table = self.client.get_table(table_ref)

    def process_item(self, item, spider):
        if item['key']:

            # BIGQUERY
            '''Order: key, source, lang, created, previous_price, lastest_price, rating, review_no, booking_no'''
            rows_to_insert = [( item['key'], item['source'], item['lang'])]
            error = self.client.insert_rows(self.table, rows_to_insert)
            if error == []:
                logging.debug('...Save data to bigquery {}...'.format(item['key']))
                # raise DropItem("Missing %s!" % item)
            else:
                logging.debug('[Error upload to Bigquery]: {}'.format(error))

            return item
        raise DropItem("Missing %s!" % item)

在 docker 文件中：

FROM python:3.5-stretch

WORKDIR /app

COPY requirements.txt ./

RUN pip install --trusted-host pypi.python.org -r requirements.txt

COPY . /app

# For Bigquery
# key.json is already in right location
ENV GOOGLE_APPLICATION_CREDENTIALS='/app/key.json'

# Sheduler cron

RUN apt-get update && apt-get -y install cron

# Add crontab file in the cron directory
ADD crontab /etc/cron.d/s-cron

# Give execution rights on the cron job
RUN chmod 0644 /etc/cron.d/s-cron

# Apply cron job
RUN crontab /etc/cron.d/s-cron

# Create the log file to be able to run tail
RUN touch /var/log/cron.log

# Run the command on container startup
CMD cron && tail -f /var/log/cron.log

在 crontab 中：

# Run once every day at midnight. Need empty line at the end to run.
0 0 * * * cd /app && /usr/local/bin/scrapy crawl spider >> /var/log/cron.log 2>&1

综上所述，如何获取crontab运行爬虫不报403错误。非常感谢大家的支持。

Answer 1

我建议您直接在代码中加载服务帐户，而不是像这样从环境中加载：

from google.cloud import bigquery
from google.cloud.bigquery.client import Client
service_account_file_path = "/app/key.json" # your service account auth file file
client = bigquery.Client.from_service_account_json(service_account_file_path)

其余代码应保持不变，因为您验证它是一个工作代码

尝试从 Scrapy 管道将爬行数据写入 Bigquery 时，请求的身份验证范围不足 (403)

Request had insufficient authentication scopes (403) when trying to write crawling data to Bigquery from pipeline of Scrapy

python

cron

google-bigquery

scrapy-pipeline