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using System;
using System.Diagnostics.CodeAnalysis;
using System.Text;
using Npgsql;
namespace NpgsqlRest;
internal class HttpFile(IApplicationBuilder builder, NpgsqlRestOptions options, ILogger? logger)
{
private readonly HashSet<string> _initializedFiles = [];
private readonly Dictionary<string, StringBuilder> _fileContent = [];
private bool _endpoint = false;
private bool _file = false;
internal void HandleEntry(Routine routine, RoutineEndpoint endpoint)
{
if (options.HttpFileOptions.Option == HttpFileOption.Disabled)
{
return;
}
_endpoint = options.HttpFileOptions.Option == HttpFileOption.Endpoint || options.HttpFileOptions.Option == HttpFileOption.Both;
_file = options.HttpFileOptions.Option == HttpFileOption.File || options.HttpFileOptions.Option == HttpFileOption.Both;
var fileName = FormatFileName();
if (_initializedFiles.Add(fileName))
{
StringBuilder content = new();
content.AppendLine(string.Concat("@host=", GetHost(builder)));
content.AppendLine();
_fileContent[fileName] = content;
}
StringBuilder sb = new();
if (options.HttpFileOptions.CommentHeader != CommentHeader.None)
{
switch (options.HttpFileOptions.CommentHeader)
{
case CommentHeader.Simple:
{
sb.AppendLine(string.Concat("// ",
routine.TypeInfo, " ",
routine.Schema, ".",
routine.Name, "(",
routine.ParamCount == 0 ? ")" : ""));
if (routine.ParamCount > 0)
{
for (var i = 0; i < routine.ParamCount; i++)
{
var name = routine.ParamNames[i];
var defaultValue = routine.ParamDefaults[i];
var paramType = routine.ParamTypes[i];
var type = defaultValue == null ? paramType : $"{paramType} DEFAULT {defaultValue}";
sb.AppendLine(string.Concat("// ", name, " ", type, i == routine.ParamCount - 1 ? "" : ","));
}
sb.AppendLine("// )");
}
if (!routine.ReturnsRecord)
{
sb.AppendLine(string.Concat("// returns ", routine.ReturnType));
}
else
{
if (routine.ReturnsUnnamedSet)
{
sb.AppendLine(string.Concat("// returns setof ", routine.ReturnRecordTypes[0]));
}
else
{
sb.AppendLine("// returns table(");
for (var i = 0; i < routine.ReturnRecordCount; i++)
{
var name = routine.ReturnRecordNames[i];
var type = routine.ReturnRecordTypes[i];
sb.AppendLine(string.Concat("// ", name, " ", type, i == routine.ReturnRecordCount - 1 ? "" : ","));
}
sb.AppendLine("// )");
}
}
break;
}
case CommentHeader.Full:
{
foreach (var line in routine.Definition.Split('\n', StringSplitOptions.RemoveEmptyEntries))
{
if (line == "\r")
{
continue;
}
sb.AppendLine(string.Concat("// ", line.TrimEnd('\r')));
}
break;
}
}
}
if (endpoint.ParamNames.Length == 0 || endpoint.RequestParamType != RequestParamType.QueryString)
{
sb.AppendLine(string.Concat(endpoint.Method, " {{host}}", endpoint.Url));
}
if (endpoint.ParamNames.Length > 0 && endpoint.RequestParamType == RequestParamType.QueryString)
{
sb.AppendLine(string.Concat(endpoint.Method, " {{host}}", endpoint.Url, "?",
string.Join("&", endpoint
.ParamNames
.Select((p, i) =>
{
var descriptor = routine.ParamTypeDescriptor[i];
var value = SampleValueUnquoted(i, descriptor);
if (descriptor.IsArray)
{
return string.Join("&", value.Split(',').Select(v => $"{p}={Uri.EscapeDataString(v)}"));
}
return $"{p}={Uri.EscapeDataString(value)}";
}))));
}
if (endpoint.ParamNames.Length > 0 && endpoint.RequestParamType == RequestParamType.BodyJson)
{
sb.AppendLine("content-type: application/json");
sb.AppendLine();
sb.AppendLine("{");
foreach(var (p, i) in endpoint.ParamNames.Select((p, i) => (p, i)))
{
sb.AppendLine(string.Concat(
" \"", p,
"\": ",
SampleValue(i, routine.ParamTypeDescriptor[i]),
i == endpoint.ParamNames.Length - 1 ? "" : ","));
}
sb.AppendLine("}");
}
sb.AppendLine();
sb.AppendLine("###");
sb.AppendLine();
_fileContent[fileName].Append(sb);
return;
string FormatFileName()
{
var name = GetName(options);
var schema = options.HttpFileOptions.FileMode != HttpFileMode.Schema ? "" : string.Concat("_", routine.Schema);
return string.Concat(string.Format(options.HttpFileOptions.NamePattern, name, schema), ".http");
}
}
internal void FinalizeHttpFile()
{
if (options.HttpFileOptions.Option == HttpFileOption.Disabled)
{
return;
}
if (_endpoint)
{
foreach(var (fileName, content) in _fileContent)
{
var path = $"/{fileName}";
builder.Use(async (context, next) =>
{
if (!(string.Equals(context.Request.Method, "GET", StringComparison.OrdinalIgnoreCase) &&
string.Equals(context.Request.Path, path, StringComparison.Ordinal)))
{
await next(context);
return;
}
context.Response.StatusCode = 200;
context.Response.ContentType = "text/plain";
await context.Response.WriteAsync(content.ToString());
});
Logging.LogInfo(ref logger, ref options, "Exposed HTTP file content on URL: {0}{1}", GetHost(builder), path);
}
}
if (_file)
{
foreach(var (fileName, content) in _fileContent)
{
var fullFileName = Path.Combine(Environment.CurrentDirectory, fileName);
if (!options.HttpFileOptions.FileOverwrite && File.Exists(fullFileName))
{
continue;
}
File.WriteAllText(fullFileName, content.ToString());
Logging.LogInfo(ref logger, ref options, "Created HTTP file: {0}", fullFileName);
}
}
}
private static string SampleValueUnquoted(int i, TypeDescriptor type)
{
return SampleValue(i, type, isQuery: true).Trim('"');
}
private static string SampleValue(int i, TypeDescriptor type, bool isQuery = false)
{
var counter = i;
if (type.IsNumeric)
{
if (string.Equals(type.Type, "real", StringComparison.OrdinalIgnoreCase) ||
string.Equals(type.Type, "double precision", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"{counter + 2}.{counter + 3}",
$"{counter + 3}.{counter + 4}",
$"{counter + 4}.{counter + 5}",
false);
}
return $"{counter+1}.{counter+2}";
}
else
if (type.IsArray)
{
return GetArray((counter + 1).ToString(), (counter + 2).ToString(), (counter + 3).ToString(), false);
}
return (counter + 1).ToString();
}
if (type.IsBoolean)
{
if (type.IsArray)
{
return GetArray(
((counter + 1) % 2 == 1).ToString().ToLower(),
((counter + 2) % 2 == 1).ToString().ToLower(),
((counter + 3) % 2 == 1).ToString().ToLower(),
false);
}
return (counter % 2 == 1).ToString().ToLower();
}
if (type.Type == "uuid")
{
if (type.IsArray)
{
return GetArray(
new Guid().ToString(),
new Guid().ToString(),
new Guid().ToString(),
true);
}
return Quote(new Guid().ToString());
}
if (type.IsDateTime)
{
var now = new DateTime(2024, counter % 12 + 1, counter % 28 + 1, counter % 24, counter % 60, counter % 60);
if (type.IsArray)
{
return GetArray(
now.AddDays(-2).ToString("O")[..22],
now.AddDays(-1).ToString("O")[..22],
now.ToString("O")[..22],
true);
}
return Quote(now.ToString("O")[..22]);
}
if (type.IsDate)
{
var now = new DateTime(2024, counter % 12 + 1, counter % 28 + 1, counter % 24, counter % 60, counter % 60);
if (type.IsArray)
{
return GetArray(
now.AddDays(-2).ToString("yyyy-MM-dd"),
now.AddDays(-1).ToString("yyyy-MM-dd"),
now.ToString("yyyy-MM-dd"),
true);
}
return Quote(now.ToString("yyyy-MM-dd"));
}
if (type.IsJson)
{
if (type.IsArray)
{
return GetArray("{}", "{}", "{}", false);
}
return "{}";
}
if (string.Equals(type.Type, "jsonpath", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"$.user.addresses[0].city",
$"$.user.addresses[1].street",
$"$.user.addresses[2].postalNumber",
true);
}
return Quote($"$.user.addresses[0].city");
}
if (string.Equals(type.Type, "time without time zone", StringComparison.OrdinalIgnoreCase))
{
var now = new DateTime(2024, counter % 12 + 1, counter % 28 + 1, counter % 24, counter % 60, counter % 60);
if (type.IsArray)
{
return GetArray(
now.AddDays(-2).TimeOfDay.ToString()[..^1],
now.AddDays(-1).TimeOfDay.ToString()[..^1],
now.TimeOfDay.ToString()[..^1],
true);
}
return Quote(now.TimeOfDay.ToString()[..^1]);
}
if (string.Equals(type.Type, "time with time zone", StringComparison.OrdinalIgnoreCase))
{
var now = new DateTime(2024, counter % 12 + 1, counter % 28 + 1, counter % 24, counter % 60, counter % 60);
if (type.IsArray)
{
return GetArray(
string.Concat(now.AddDays(-2).TimeOfDay.ToString()[..^1], "+01:00"),
string.Concat(now.AddDays(-1).TimeOfDay.ToString()[..^1], "+01:00"),
string.Concat(now.TimeOfDay.ToString()[..^1], "+01:00"),
true);
}
return Quote(string.Concat(now.TimeOfDay.ToString()[..^1], "+01:00"));
}
if (string.Equals(type.Type, "interval", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"{counter + 1} minutes {(counter + 2) % 60} seconds",
$"{counter + 2} minutes {(counter + 3) % 60} seconds",
$"{counter + 3} minutes {(counter + 4) % 60} seconds",
true);
}
return Quote($"{counter} minutes {(counter + 1) % 60} seconds");
}
if (string.Equals(type.Type, "varbit", StringComparison.OrdinalIgnoreCase) ||
string.Equals(type.Type, "bit varying", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"110",
$"101",
$"011",
true);
}
return Quote($"{(counter) % 2}{(counter+1) % 2}{(counter+2) % 2}");
}
if (string.Equals(type.Type, "inet", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"192.168.5.{counter}",
$"192.168.5.{counter+1}",
$"192.168.5.{counter+2}",
true);
}
return Quote($"192.168.5.{counter}");
}
if (string.Equals(type.Type, "macaddr", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"00-B0-D0-63-C2-26",
$"00-B0-D0-63-C2-26",
$"00-B0-D0-63-C2-26",
true);
}
return Quote($"00-B0-D0-63-C2-26");
}
if (string.Equals(type.Type, "bytea", StringComparison.OrdinalIgnoreCase))
{
if (type.IsArray)
{
return GetArray(
$"\\\\xFEADBAEF",
$"\\\\xAEADBDEF",
$"\\\\xEEADEEEF",
true);
}
return Quote($"\\\\xDEADBEEF");
}
if (type.IsArray)
{
return GetArray(GetSubstring(counter), GetSubstring(counter + 1), GetSubstring(counter + 2), true);
}
return Quote(GetSubstring());
static string Quote(string value) => string.Concat("\"", value, "\"");
string GetArray(string v1, string v2, string v3, bool quoted)
{
if (isQuery)
{
return string.Concat(v1, ",", v2, ",", v3);
}
return quoted ? string.Concat("[", Quote(v1), ", ", Quote(v2), ", ", Quote(v3), "]") : string.Concat("[", v1, ", ", v2, ", ", v3, "]");
}
string GetSubstring(int? value = null) => ((value ?? counter) % 3) switch
{
0 => "ABC",
1 => "XYZ",
2 => "IJK",
_ => "WTF"
};
}
[UnconditionalSuppressMessage("Aot", "IL2026:RequiresUnreferencedCode",
Justification = "Configuration.GetValue only uses string type parameters")]
private static string GetHost(IApplicationBuilder builder)
{
string? host = null;
if (builder is WebApplication app)
{
if (app.Urls.Count != 0)
{
host = app.Urls.FirstOrDefault();
}
else
{
host = app.Configuration.GetValue<string>("ASPNETCORE_URLS")?.Split(";")?.LastOrDefault();
}
}
// default, assumed host
host ??= "http://localhost:5000";
return host;
}
private static string GetName(NpgsqlRestOptions options)
{
return new NpgsqlConnectionStringBuilder(options.ConnectionString).Database ??
options?.ConnectionString?.Split(";").Where(s => s.StartsWith("Database=")).FirstOrDefault()?.Split("=")?.Last() ??
"npgsql";
}
}
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