public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
ILogger log)
{
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
var resp = await FHIRUtils.CallFHIRServer("", FHIRUtils.TransformBundle(requestBody, log), HttpMethod.Post, log);
string r = "{}";
if (resp != null)
{
r = resp.Content;
}
int sc = (int)resp.Status;
return(new ContentResult()
{
Content = r, StatusCode = sc, ContentType = "application/json"
});
}
public static async Task Run([EventGridTrigger] EventGridEvent blobCreatedEvent,
[Blob("{data.url}", FileAccess.Read, Connection = "FBI-STORAGEACCT")] Stream myBlob,
ILogger log)
{
bool trbundles = true;
string strbundles = System.Environment.GetEnvironmentVariable("FBI-TRANSFORMBUNDLES");
if (!string.IsNullOrEmpty(strbundles) && (strbundles.ToLower().Equals("no") || strbundles.ToLower().Equals("false")))
{
trbundles = false;
}
StorageBlobCreatedEventData createdEvent = ((JObject)blobCreatedEvent.Data).ToObject <StorageBlobCreatedEventData>();
string name = createdEvent.Url.Substring(createdEvent.Url.LastIndexOf('/') + 1);
if (myBlob == null)
{
return;
}
log.LogInformation($"ImportFHIRBUndles: Processing file Name:{name} \n Size: {myBlob.Length}");
var cbclient = StorageUtils.GetCloudBlobClient(System.Environment.GetEnvironmentVariable("FBI-STORAGEACCT"));
StreamReader reader = new StreamReader(myBlob);
var text = await reader.ReadToEndAsync();
var trtext = (trbundles ? FHIRUtils.TransformBundle(text, log) : text);
var fhirbundle = await FHIRUtils.CallFHIRServer("", trtext, HttpMethod.Post, log);
var result = LoadErrorsDetected(trtext, fhirbundle, name, log);
//Bundle Post was Throttled we can retry
if (!fhirbundle.Success && fhirbundle.Status == System.Net.HttpStatusCode.TooManyRequests)
{
//Currently cannot use retry hints with EventGrid Trigger function bindings so we will throw and exception to enter eventgrid retry logic for FHIR Server throttling and do
//our own dead letter for internal errors or unrecoverable conditions
log.LogInformation($"ImportFHIRBUndles File Name:{name} is throttled...");
throw new Exception($"ImportFHIRBUndles: Transient Error File: {name}...Entering eventgrid retry process until success or ultimate failure to dead letter if configured.");
}
//No Errors move to processed container
if (fhirbundle.Success && ((JArray)result["errors"]).Count == 0 && ((JArray)result["throttled"]).Count == 0)
{
await StorageUtils.MoveTo(cbclient, "bundles", "bundlesprocessed", name, $"{name}.processed", log);
await StorageUtils.WriteStringToBlob(cbclient, "bundlesprocessed", $"{name}.processed.result", fhirbundle.Content, log);
log.LogInformation($"ImportFHIRBUndles Processed file Name:{name}");
}
//Handle Errors from FHIR Server of proxy
if (!fhirbundle.Success || ((JArray)result["errors"]).Count > 0)
{
await StorageUtils.MoveTo(cbclient, "bundles", "bundleserr", name, $"{name}.err", log);
await StorageUtils.WriteStringToBlob(cbclient, "bundleserr", $"{name}.err.response", fhirbundle.Content, log);
await StorageUtils.WriteStringToBlob(cbclient, "bundleserr", $"{name}.err.actionneeded", result.ToString(), log);
log.LogInformation($"ImportFHIRBUndles File Name:{name} had errors. Moved to deadletter bundleserr directory");
}
//Handle Throttled Requests inside of bundle so we will create a new bundle to retry
if (fhirbundle.Success && ((JArray)result["throttled"]).Count > 0)
{
var nb = NDJSONConverter.initBundle();
nb["entry"] = result["throttled"];
string fn = $"retry{Guid.NewGuid().ToString().Replace("-","")}.json";
await StorageUtils.MoveTo(cbclient, "bundles", "bundlesprocessed", name, $"{name}.processed", log);
await StorageUtils.WriteStringToBlob(cbclient, "bundlesprocessed", $"{name}.processed.result", fhirbundle.Content, log);
await StorageUtils.WriteStringToBlob(cbclient, "bundles", fn, nb.ToString(), log);
log.LogInformation($"ImportFHIRBUndles File Name:{name} had throttled resources in response bundle. Moved to processed..Created retry bunde {fn}");
}
}
