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Python3: GraphQL サーバーにアクセスする方法

Last updated at Posted at 2022-02-20

こちらで作成した Graph QL サーバーにアクセスする方法です。
Apollo Server の使い方

プログラム

graphql_client.py
#! /usr/bin/python
#
#	graphql_client.py
#
#					  Apr/15/2023
#
# ------------------------------------------------------------------
import  sys
import  requests
# ------------------------------------------------------------------
def file_to_str_proc(file_in):
	str_out = ""
	try:
		fp_in = open(file_in,encoding='utf-8')
		str_out = fp_in.read()
		fp_in.close()
	except Exception as ee:
		sys.stderr.write("*** error *** file_to_str_proc ***\n")
		sys.stderr.write(str (ee))
#
	return  str_out
# ------------------------------------------------------------------
sys.stderr.write("*** 開始 ***\n")

file_json = sys.argv[1]
json_str = file_to_str_proc(file_json)
url="http://localhost:4000"
headers = {"Content-Type": "application/json"}
#
response = requests.post(url, headers=headers, data=json_str)
#
print(response.text)
#
sys.stderr.write("*** 終了 ***\n")
# ------------------------------------------------------------------
query.json
{
 "query": "query { books { title author }}"
}

実行結果

$ ./graphql_client.py query.json | jq
*** 開始 ***
*** 終了 ***
{
  "data": {
    "books": [
      {
        "title": "心",
        "author": "夏目漱石"
      },
      {
        "title": "舞姫",
        "author": "森鴎外"
      },
      {
        "title": "春",
        "author": "島崎藤村"
      }
    ]
  }
}

確認したバージョン

$ python --version
Python 3.10.10
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