如何配置Google云平台数据丢失预防客户端库，使python在SSL代理后工作？

Question

我正在使用文档中的代码片段：

# Import the client library
import google.cloud.dlp
import os
import subprocess
import json
import requests
import getpass
import urllib.parse

import logging

logging.basicConfig(level=logging.DEBUG)

# Instantiate a client.
dlp_client = google.cloud.dlp.DlpServiceClient()

# The string to inspect
content = 'Robert Frost'

# Construct the item to inspect.
item = {'value': content}

# The info types to search for in the content. Required.
info_types = [{'name': 'FIRST_NAME'}, {'name': 'LAST_NAME'}]

# The minimum likelihood to constitute a match. Optional.
min_likelihood = 'LIKELIHOOD_UNSPECIFIED'

# The maximum number of findings to report (0 = server maximum). Optional.
max_findings = 0

# Whether to include the matching string in the results. Optional.
include_quote = True

# Construct the configuration dictionary. Keys which are None may
# optionally be omitted entirely.
inspect_config = {
    'info_types': info_types,
    'min_likelihood': min_likelihood,
    'include_quote': include_quote,
    'limits': {'max_findings_per_request': max_findings},
}

# Convert the project id into a full resource id.
parent = dlp_client.project_path('my-project-id')

# Call the API.
response = dlp_client.inspect_content(parent, inspect_config, item)

# Print out the results.
if response.result.findings:
    for finding in response.result.findings:
        try:
            print('Quote: {}'.format(finding.quote))
        except AttributeError:
            pass
        print('Info type: {}'.format(finding.info_type.name))
        # Convert likelihood value to string respresentation.
        likelihood = (google.cloud.dlp.types.Finding.DESCRIPTOR
                      .fields_by_name['likelihood']
                      .enum_type.values_by_number[finding.likelihood]
                      .name)
        print('Likelihood: {}'.format(likelihood))
else:
    print('No findings.')

我还设置了以下ENV变量：

GOOGLE_APPLICATION_CREDENTIALS

REQUESTS_CA_BUNDLE
HTTP_PROXY
HTTPS_PROXY

E0920 12:21:49.931000000 24852 src/core/tsi/ssl_transport_security.cc:1229] Handshake failed with fatal error SSL_ERROR_SSL: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed.
DEBUG:google.api_core.retry:Retrying due to 503 Connect Failed, sleeping 0.0s ...
E0920 12:21:50.927000000 24852 src/core/tsi/ssl_transport_security.cc:1229] Handshake failed with fatal error SSL_ERROR_SSL: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed.
DEBUG:google.api_core.retry:Retrying due to 503 Connect Failed, sleeping 0.0s ...

它似乎与CA证书和握手有关。对于BigQuery和Storage Client python库，相同的CA没有问题。知道吗？

Answer 1

GRPC_DEFAULT_SSL_ROOTS_FILE_PATH=path_file.pem  
# for debugging
RPC_TRACE=transport_security,tsi  
GRPC_VERBOSITY=DEBUG