esim/http_json_api: allow URL rewriting

The URL used when HTTP requests are performed is defined statically
with the url_prefix passed to the constructor of JsonHttpApiClient
together with the path property in JsonHttpApiFunction.

For applications that require dynamic URLs there is no way to rewrite
the URL. Let's add a mechanism that allows API users to apply custom
URL reqriting rules by adding a reqrite_url method to
JsonHttpApiFunction. API users may then overload this method with a
custom implementation as needed.

Related: SYS#7918
Change-Id: Id2713a867079cc140517fe312189e5e2162608a5
This commit is contained in:
Philipp Maier
2026-03-05 15:38:40 +01:00
parent a5a5865c7c
commit 0d891e362d

View File

@@ -180,7 +180,7 @@ class JsonHttpApiFunction(abc.ABC):
# receives from the a requesting client. The same applies vice versa to class variables that have an "output_"
# prefix.
# path of the API function (e.g. '/gsma/rsp2/es2plus/confirmOrder')
# path of the API function (e.g. '/gsma/rsp2/es2plus/confirmOrder', see also method rewrite_url).
path = None
# dictionary of input parameters. key is parameter name, value is ApiParam class
@@ -336,6 +336,22 @@ class JsonHttpApiFunction(abc.ABC):
output[p] = p_class.decode(v)
return output
def rewrite_url(self, data: dict, url: str) -> Tuple[dict, str]:
"""
Rewrite a static URL using information passed in the data dict. This method may be overloaded by a derived
class to allow fully dynamic URLs. The input parameters required for the URL rewriting may be passed using
data parameter. In case those parameters are additional parameters that are not intended to be passed to
the encode_client method later, they must be removed explcitly.
Args:
data: (see JsonHttpApiClient and JsonHttpApiServer)
url: statically generated URL string (see comment in JsonHttpApiClient)
"""
# This implementation is a placeholder in which we do not perform any URL rewriting. We just pass through data
# and url unmodified.
return data, url
class JsonHttpApiClient():
def __init__(self, api_func: JsonHttpApiFunction, url_prefix: str, func_req_id: Optional[str],
session: requests.Session):
@@ -352,8 +368,21 @@ class JsonHttpApiClient():
self.session = session
def call(self, data: dict, func_call_id: Optional[str] = None, timeout=10) -> Optional[dict]:
"""Make an API call to the HTTP API endpoint represented by this object. Input data is passed in `data` as
json-serializable dict. Output data is returned as json-deserialized dict."""
"""
Make an API call to the HTTP API endpoint represented by this object. Input data is passed in `data` as
json-serializable fields. `data` may also contain additional parameters required for URL reqriting (see
rewrite_url in class JsonHttpApiFunction). Output data is returned as json-deserialized dict.
Args:
data: Input data required to perform the request.
func_call_id: Function Call Identifier, if present a header field is generated automatically.
timeout: Maximum amount of time to wait for the request to complete.
"""
# The URL used for the HTTP request (see below) normally consists of the initially given url_prefix
# concatenated with the path defined by the JsonHttpApiFunction definition. This static URL path may be
# rewritten by rewrite_url method defined in the JsonHttpApiFunction.
data, url = self.api_func.rewrite_url(data, self.url_prefix + self.api_func.path)
# In case a function caller ID is supplied, use it together with the stored function requestor ID to generate
# and prepend the header field according to SGP.22, section 6.5.1.1 and 6.5.1.3. (the presence of the header
@@ -373,7 +402,6 @@ class JsonHttpApiClient():
req_headers.update(self.api_func.extra_http_req_headers)
# Perform HTTP request
url = self.url_prefix + self.api_func.path
logger.debug("HTTP REQ %s - hdr: %s '%s'" % (url, req_headers, encoded))
response = self.session.request(self.api_func.http_method, url, data=encoded, headers=req_headers, timeout=timeout)
logger.debug("HTTP RSP-STS: [%u] hdr: %s" % (response.status_code, response.headers))