async Task<bool> RefreshConfigData()
{
// Get the latest config data:
SHA1Hashed<JObject> config;
try
{
// TODO: add HTTP fetch first and failover to file, like we did before.
config = await FetchConfigDataFile();
}
catch (Exception ex)
{
// Create a service collection that represents the parser error:
this.services = SHA1Hashed.Create(
new ServicesOffering(
new ServiceCollection
{
Errors = new List<string>
{
"{0}".F(ex.Message)
},
// Empty dictionary is easier than dealing with `null`:
Services = new Dictionary<string, Service>(0, StringComparer.OrdinalIgnoreCase)
},
(JObject)null
),
SHA1Hashed.Zero
);
return false;
}
Debug.Assert(config != null);
// Parse the config object:
var tmp = ParseConfigData(config.Value);
Debug.Assert(tmp != null);
// Store the new service collection paired with the JSON hash:
this.services = SHA1Hashed.Create(new ServicesOffering(tmp, config.Value), config.Hash);
return true;
}
IHttpResponseAction errorsService(SHA1Hashed<ServicesOffering> main, Service service)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
},
meta: new
{
configHash = main.HashHexString,
serviceName = service.Name,
serviceErrors = service.Errors,
methodsErrors = service.Methods.Where(m => m.Value.Errors.Any()).ToDictionary(
m => m.Key,
m => new { errors = m.Value.Errors },
StringComparer.OrdinalIgnoreCase
)
}
);
}
IHttpResponseAction errorsAll(SHA1Hashed<ServicesOffering> main)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
},
meta: new
{
configHash = main.HashHexString,
rootErrors = main.Value.Services.Errors,
servicesErrors =
main.Value.Services.Services.Where(s => s.Value.Errors.Any() || s.Value.Methods.Any(m => m.Value.Errors.Any())).ToDictionary(
s => s.Key,
s => new
{
serviceErrors = s.Value.Errors,
methodsErrors = s.Value.Methods.Where(m => m.Value.Errors.Any()).ToDictionary(
m => m.Key,
m => new { errors = m.Value.Errors },
StringComparer.OrdinalIgnoreCase
)
},
StringComparer.OrdinalIgnoreCase
)
}
);
}
IHttpResponseAction configAll(SHA1Hashed<ServicesOffering> main)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
},
meta: new
{
configHash = main.HashHexString,
config = main.Value.Config
}
);
}
IHttpResponseAction errorsMethod(SHA1Hashed<ServicesOffering> main, Service service, Method method)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
},
meta: new
{
configHash = main.HashHexString,
serviceName = service.Name,
methodName = method.Name,
methodErrors = method.Errors
}
);
}
IHttpResponseAction debugAll(SHA1Hashed<ServicesOffering> main)
{
// Report all service descriptors as links:
return new JsonRootResponse(
links: main.Value.Services.Services.Select(p => RestfulLink.Create(p.Key, "/debug/{0}".F(p.Key))).ToArray(),
meta: new
{
configHash = main.HashHexString
}
);
}
IHttpResponseAction debugService(SHA1Hashed<ServicesOffering> main, Service service)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
RestfulLink.Create("self", "/debug/{0}".F(service.Name), "self"),
RestfulLink.Create("parent", "/debug", "parent"),
RestfulLink.Create("meta", "/meta/{0}".F(service.Name)),
RestfulLink.Create("errors", "/errors/{0}".F(service.Name))
},
meta: new
{
configHash = main.HashHexString,
service = new ServiceDebug(service)
}
);
}
IHttpResponseAction debugMethod(SHA1Hashed<ServicesOffering> main, Service service, Method method)
{
return new JsonRootResponse(
links: new RestfulLink[]
{
RestfulLink.Create("self", "/debug/{0}/{1}".F(service.Name, method.Name), "self"),
RestfulLink.Create("parent", "/debug/{0}".F(service.Name), "parent"),
RestfulLink.Create("meta", "/meta/{0}/{1}".F(service.Name, method.Name)),
RestfulLink.Create("errors", "/errors/{0}/{1}".F(service.Name, method.Name)),
RestfulLink.Create("data", "/data/{0}/{1}".F(service.Name, method.Name))
},
meta: new
{
configHash = main.HashHexString,
method = new MethodDebug(method)
}
);
}
async Task<IHttpResponseAction> dataMethod(SHA1Hashed<ServicesOffering> main, Method method, System.Collections.Specialized.NameValueCollection queryString)
{
// Check for descriptor errors:
if (method.Errors.Count > 0)
{
return new JsonRootResponse(
statusCode: 500,
statusDescription: "Bad method descriptor",
message: "Bad method descriptor",
meta: new
{
configHash = main.HashHexString,
serviceName = method.Service.Name,
methodName = method.Name,
errors = method.Errors.ToArray()
}
);
}
// Check required parameters:
if (method.Parameters != null)
{
// Create a hash set of the query-string parameter names:
var q = new HashSet<string>(queryString.AllKeys, StringComparer.OrdinalIgnoreCase);
// Create a list of missing required parameter names:
var missingParams = new List<string>(method.Parameters.Count(p => !p.Value.IsOptional));
missingParams.AddRange(
from p in method.Parameters
where !p.Value.IsOptional && !q.Contains(p.Key)
select p.Key
);
if (missingParams.Count > 0)
return new JsonRootResponse(
statusCode: 400,
statusDescription: "Missing required parameters",
message: "Missing required parameters",
meta: new
{
configHash = main.HashHexString,
serviceName = method.Service.Name,
methodName = method.Name
},
errors: new[]
{
new
{
missingParams = missingParams.ToDictionary(
p => p,
p => new ParameterSerialized(method.Parameters[p]),
StringComparer.OrdinalIgnoreCase
)
}
}
);
missingParams = null;
}
// Open a connection and execute the command:
using (var conn = new SqlConnection(method.ConnectionString))
using (var cmd = conn.CreateCommand())
{
var parameterValues = new Dictionary<string, ParameterValue>(method.Parameters == null ? 0 : method.Parameters.Count);
// Add parameters:
if (method.Parameters != null)
{
foreach (var param in method.Parameters)
{
bool isValid = true;
string message = null;
object sqlValue, clrValue;
var paramType = (param.Value.SqlType ?? param.Value.Type);
string rawValue = queryString[param.Key];
if (param.Value.IsOptional & (rawValue == null))
{
// Use the default value if the parameter is optional and is not specified on the query-string:
sqlValue = param.Value.DefaultSQLValue;
clrValue = param.Value.DefaultCLRValue;
}
else
{
try
{
sqlValue = getSqlValue(paramType.SqlDbType, rawValue);
if (sqlValue == null)
{
isValid = false;
message = "Unsupported SQL type '{0}'".F(paramType.SqlDbType);
}
}
catch (Exception ex)
{
isValid = false;
sqlValue = DBNull.Value;
message = ex.Message;
}
try
{
clrValue = getCLRValue(paramType.SqlDbType, rawValue);
}
catch { clrValue = null; }
}
parameterValues.Add(param.Key, isValid ? new ParameterValue(clrValue) : new ParameterValue(message, rawValue));
// Add the SQL parameter:
var sqlprm = cmd.Parameters.Add(param.Value.Name, paramType.SqlDbType);
sqlprm.IsNullable = param.Value.IsOptional;
if (paramType.Length != null) sqlprm.Precision = (byte)paramType.Length.Value;
if (paramType.Scale != null) sqlprm.Scale = (byte)paramType.Scale.Value;
sqlprm.SqlValue = sqlValue;
}
}
// Abort if we have invalid parameters:
var invalidParameters = parameterValues.Where(p => !p.Value.isValid);
if (invalidParameters.Any())
{
return new JsonRootResponse(
statusCode: 400,
statusDescription: "Invalid parameter value(s)",
message: "Invalid parameter value(s)",
meta: new
{
configHash = main.HashHexString,
serviceName = method.Service.Name,
methodName = method.Name
},
errors: invalidParameters.Select(p => (object)new { name = p.Key, attemptedValue = p.Value.attemptedValue, message = p.Value.message }).ToArray()
);
}
//cmd.CommandTimeout = 360; // seconds
cmd.CommandType = CommandType.Text;
// Set TRANSACTION ISOLATION LEVEL and optionally ROWCOUNT before the query:
const string setIsoLevel = "SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;\r\n";
var sbCmd = new StringBuilder(setIsoLevel, setIsoLevel.Length + method.Query.SQL.Length);
//if (rowLimit > 0)
// sbCmd.Append("SET ROWCOUNT {0};\r\n".F(rowLimit));
sbCmd.Append(method.Query.SQL);
cmd.CommandText = sbCmd.ToString();
// Stopwatches used for precise timing:
Stopwatch swOpenTime, swExecTime, swReadTime;
swOpenTime = Stopwatch.StartNew();
try
{
// Open the connection asynchronously:
await conn.OpenAsync();
swOpenTime.Stop();
}
catch (Exception ex)
{
swOpenTime.Stop();
return getErrorResponse(ex);
}
// Execute the query:
SqlDataReader dr;
swExecTime = Stopwatch.StartNew();
try
{
// Execute the query asynchronously:
dr = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess | CommandBehavior.CloseConnection);
swExecTime.Stop();
}
catch (ArgumentException aex)
{
swExecTime.Stop();
// SQL Parameter validation only gives `null` for `aex.ParamName`.
return new JsonRootResponse(400, aex.Message);
}
catch (Exception ex)
{
swExecTime.Stop();
return getErrorResponse(ex);
}
swReadTime = Stopwatch.StartNew();
try
{
var results = await ReadResult(method, dr, RowMapperUseMapping);
swReadTime.Stop();
var meta = new MetadataSerialized
{
configHash = main.HashHexString,
serviceName = method.Service.Name,
methodName = method.Name,
deprecated = method.DeprecatedMessage,
parameters = parameterValues,
// Timings are in msec:
timings = new MetadataTimingsSerialized
{
open = Math.Round(swOpenTime.ElapsedTicks * 1000m / (decimal)Stopwatch.Frequency, 2),
exec = Math.Round(swExecTime.ElapsedTicks * 1000m / (decimal)Stopwatch.Frequency, 2),
read = Math.Round(swReadTime.ElapsedTicks * 1000m / (decimal)Stopwatch.Frequency, 2),
total = Math.Round((swOpenTime.ElapsedTicks + swExecTime.ElapsedTicks + swReadTime.ElapsedTicks) * 1000m / (decimal)Stopwatch.Frequency, 2),
}
};
return new JsonRootResponse(
links: new RestfulLink[]
{
},
meta: meta,
results: results
);
}
catch (JsonResultException jex)
{
swReadTime.Stop();
return new JsonRootResponse(statusCode: jex.StatusCode, message: jex.Message);
}
catch (Exception ex)
{
swReadTime.Stop();
return getErrorResponse(ex);
}
}
}
SHA1Hashed<JObject> ReadJSONStream(TextReader input)
{
#if TRACE
// Send the JSON to Console.Out while it's being read:
using (var tee = new TeeTextReader(input, (line) => Console.Write(line)))
using (var sha1 = new SHA1TextReader(tee, UTF8.WithoutBOM))
#else
using (var sha1 = new SHA1TextReader(input, UTF8.WithoutBOM))
#endif
using (var jr = new JsonTextReader(sha1))
{
// NOTE(jsd): Relying on parameter evaluation order for `sha1.GetHash()` to be correct.
var result = new SHA1Hashed<JObject>(Json.Serializer.Deserialize<JObject>(jr), sha1.GetHash());
#if TRACE
Console.WriteLine();
Console.WriteLine();
#endif
return result;
}
}
