我正在尝试将https://fhir.epic.com/中的沙箱用于后端服务。
我正在关注本教程:https ://fhir.epic.com/Documentation?docId=oauth2§ion=BackendOAuth2Guide :
- 我已经注册了一个新的应用程序,
- 创建了一个 JWT(使用 SSL 密钥)
- 在https://jwt.io/上测试了 JWT :工作正常!
但我无法将 JWT 发布到端点以获取访问令牌。我应该向这个 URL 发送一个 POST 请求:https://fhir.epic.com/interconnect-fhir-oauth/oauth2/token
。
我正在使用python,这是我到目前为止的代码:
import json
import requests
from datetime import datetime, timedelta, timezone
from requests.structures import CaseInsensitiveDict
from jwt import (
JWT,
jwk_from_dict,
jwk_from_pem,
)
from jwt.utils import get_int_from_datetime
def main():
instance = JWT()
message = {
# Client ID for non-production
'iss': '990573e-13e3-143b-8b03-4fbb577b660',
'sub': '990573e-13e3-143b-8b03-4fbb577b660',
'aud': 'https://fhir.epic.com/interconnect-fhir-oauth/oauth2/token',
'jti': 'f9eaafba-2e49-11ea-8880-5ce0c5aee679',
'iat': get_int_from_datetime(datetime.now(timezone.utc)),
'exp': get_int_from_datetime(datetime.now(timezone.utc) + timedelta(hours=1)),
}
# Load a RSA key from a PEM file.
with open('/home/user/ssl/privatekey.pem', 'rb') as fh:
signing_key = jwk_from_pem(fh.read())
compact_jws = instance.encode(message, signing_key, alg='RS384')
print(compact_jws)
headers = CaseInsensitiveDict()
headers['Content-Type'] = 'application/x-www-form-urlencoded'
data = {
'grant_type': 'client_credentials',
'client_assertion_type': 'urn:ietf:params:oauth:client-assertion-type:jwt-bearer',
'client_assertion': compact_jws
}
x = requests.post('https://fhir.epic.com/interconnect-fhir-oauth/oauth2/token', headers=headers, data=data)
print(x.text)
但我总是收到 400 错误:
{
"error": "invalid_client",
"error_description": null
}
网址是否正确?如何获得访问令牌以使用沙盒?