public async Task <IActionResult> RunAsync(
[HttpTrigger(AuthorizationLevel.Function, "get", Route = "TemporaryExposureKeys")] HttpRequest req)
{
// Check Valid Route
IValidationServerService.ValidateResult validateResult = ValidationServerService.Validate(req);
if (!validateResult.IsValid)
{
return(validateResult.ErrorActionResult);
}
if (!long.TryParse(req.Query?["since"], out var sinceEpochSeconds))
{
sinceEpochSeconds = new DateTimeOffset(DateTime.UtcNow.AddDays(-14)).ToUnixTimeSeconds();
}
var keysResponse = await TekExport.GetKeysAsync((ulong)sinceEpochSeconds);
var result = new TemporaryExposureKeysResult();
// TODO: Url util
result.Keys = keysResponse
.Select(_ => new TemporaryExposureKeysResult.Key()
{
Url = $"{ExportKeyUrl}/{TekExportBlobStorageContainerPrefix}/{_.Region}/{_.BatchNum}.zip"
});
result.Timestamp = keysResponse
.OrderByDescending(_ => _.TimestampSecondsSinceEpoch)
.FirstOrDefault()?.TimestampSecondsSinceEpoch ?? sinceEpochSeconds;
return(new OkObjectResult(result));
}
public async Task RunAsync()
{
try
{
Logger.LogInformation($"start {nameof(RunAsync)}");
var batchTimestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
var items = await TekRepository.GetNextAsync();
foreach (var kv in items.GroupBy(_ => new
{
RollingStartUnixTimeSeconds = _.GetRollingStartUnixTimeSeconds(),
RollingPeriodSeconds = _.GetRollingPeriodSeconds()
}))
{
var batchNum = (int)await Sequence.GetNextAsync(SequenceName, 1);
batchTimestamp++;
foreach (var region in Regions)
{
// Security considerations: Random Order TemporaryExposureKey
var sorted = kv
.OrderBy(_ => RandomNumberGenerator.GetInt32(int.MaxValue));
await CreateAsync((ulong)kv.Key.RollingStartUnixTimeSeconds,
(ulong)(kv.Key.RollingStartUnixTimeSeconds + kv.Key.RollingPeriodSeconds),
region,
batchNum,
batchTimestamp,
sorted.ToArray());
}
foreach (var key in kv)
{
key.Exported = true;
await TekRepository.UpsertAsync(key);
}
}
// Write Export Files json
var models = await TekExportRepository.GetKeysAsync(0);
await BlobService.WriteFilesJsonAsync(models);
}
catch (Exception ex)
{
Logger.LogError(ex, $"Error on {nameof(TemporaryExposureKeyExportBatchService)}");
throw;
}
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", Route = "TemporaryExposureKeys")] HttpRequest req)
{
if (!long.TryParse(req.Query?["since"], out var sinceEpochSeconds))
{
sinceEpochSeconds = new DateTimeOffset(DateTime.UtcNow.AddDays(-14)).ToUnixTimeSeconds();
}
var keysResponse = await TekExport.GetKeysAsync((ulong)sinceEpochSeconds);
var result = new TemporaryExposureKeysResult();
// TODO: Url util
result.Keys = keysResponse.Select(_ => new TemporaryExposureKeysResult.Key()
{
Url = $"{ExportKeyUrl}/{TekExportBlobStorageContainerPrefix}/{_.BatchNum}.tekexport"
});
result.Timestamp = keysResponse.Max(_ => _.TimestampSecondsSinceEpoch);
return(new OkObjectResult(result));
}