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using System.Text;
using Npgsql;
using static NpgsqlRest.NpgsqlRestOptions;
namespace NpgsqlRest.HttpFiles;
public class HttpFile(HttpFileOptions httpFileOptions) : IEndpointCreateHandler
{
public HttpFile() : this (new HttpFileOptions()) { }
private readonly HashSet<string> _initializedFiles = [];
private readonly Dictionary<string, StringBuilder> _fileContent = [];
private bool _endpoint = false;
private bool _file = false;
private IApplicationBuilder _builder = default!;
public void Setup(IApplicationBuilder builder, NpgsqlRestOptions options)
{
_builder = builder;
}
public void Handle(RoutineEndpoint endpoint)
{
if (httpFileOptions.Option == HttpFileOption.Disabled)
{
return;
}
_endpoint = httpFileOptions.Option is HttpFileOption.Endpoint or HttpFileOption.Both;
_file = httpFileOptions.Option is HttpFileOption.File or HttpFileOption.Both;
var fileName = FormatFileName();
if (_initializedFiles.Add(fileName))
{
StringBuilder content = new();
content.AppendLine(string.Concat("@host=", GetHost()));
content.AppendLine();
_fileContent[fileName] = content;
}
StringBuilder sb = new();
if (httpFileOptions.CommentHeader != CommentHeader.None)
{
switch (httpFileOptions.CommentHeader)
{
case CommentHeader.Simple:
{
foreach (var line in endpoint.Routine.SimpleDefinition.Split('\n', StringSplitOptions.RemoveEmptyEntries))
{
if (line == "\r")
{
continue;
}
sb.AppendLine(string.Concat("// ", line.TrimEnd('\r')));
}
WriteComment(sb, endpoint.Routine);
break;
}
case CommentHeader.Full:
{
foreach (var line in endpoint.Routine.FullDefinition.Split('\n', StringSplitOptions.RemoveEmptyEntries))
{
if (line == "\r")
{
continue;
}
sb.AppendLine(string.Concat("// ", line.TrimEnd('\r')));
}
WriteComment(sb, endpoint.Routine);
break;
}
}
}
if (endpoint.Routine.Parameters.Length == 0 || endpoint.RequestParamType != RequestParamType.QueryString)
{
sb.AppendLine(string.Concat(endpoint.Method, " {{host}}", endpoint.Path));
}
if (endpoint.Routine.Parameters.Length > 0 && endpoint.RequestParamType == RequestParamType.QueryString)
{
var line = string.Concat(endpoint.Method, " {{host}}", endpoint.Path, "?",
string.Join("&", endpoint.Routine
.Parameters
.Where((p, i) =>
{
// Skip body parameter
if (endpoint.BodyParameterName is not null)
{
if (string.Equals(p.ConvertedName, endpoint.BodyParameterName, StringComparison.Ordinal) ||
string.Equals(p.ActualName, endpoint.BodyParameterName, StringComparison.Ordinal))
{
return false;
}
}
// Skip path parameters - they are already in the URL path
if (endpoint.HasPathParameters)
{
foreach (var pathParam in endpoint.PathParameters!)
{
if (string.Equals(p.ConvertedName, pathParam, StringComparison.OrdinalIgnoreCase) ||
string.Equals(p.ActualName, pathParam, StringComparison.OrdinalIgnoreCase))
{
return false;
}
}
}
return true;
})
.Select((p, i) =>
{
var descriptor = p.TypeDescriptor;
var value = SampleValueUnquoted(i, descriptor);
if (descriptor.IsArray)
{
return string.Join("&", value.Split(',').Select(v => $"{p.ConvertedName}={Uri.EscapeDataString(v)}"));
}
return $"{p.ConvertedName}={Uri.EscapeDataString(value)}";
})));
sb.AppendLine(line.EndsWith('?') ? line[..^1] : line);
if (endpoint.BodyParameterName is not null)
{
for(int i = 0; i < endpoint.Routine.Parameters.Length; i++)
{
if (string.Equals(endpoint.Routine.Parameters[i].ConvertedName, endpoint.BodyParameterName, StringComparison.Ordinal) ||
string.Equals(endpoint.Routine.Parameters[i].ActualName, endpoint.BodyParameterName, StringComparison.Ordinal))
{
sb.AppendLine();
sb.AppendLine(SampleValueUnquoted(i, endpoint.Routine.Parameters[i].TypeDescriptor));
break;
}
}
}
}
if (endpoint.Routine.Parameters.Length > 0 && endpoint.RequestParamType == RequestParamType.BodyJson)
{
// Filter out path parameters from body
var bodyParams = endpoint.Routine.Parameters
.Select((p, i) => (param: p, index: i))
.Where(x =>
{
if (endpoint.HasPathParameters)
{
foreach (var pathParam in endpoint.PathParameters!)
{
if (string.Equals(x.param.ConvertedName, pathParam, StringComparison.OrdinalIgnoreCase) ||
string.Equals(x.param.ActualName, pathParam, StringComparison.OrdinalIgnoreCase))
{
return false;
}
}
}
return true;
})
.ToList();
if (bodyParams.Count > 0)
{
sb.AppendLine("content-type: application/json");
sb.AppendLine();
sb.AppendLine("{");
for (int i = 0; i < bodyParams.Count; i++)
{
var (param, originalIndex) = bodyParams[i];
sb.AppendLine(string.Concat(
" \"", param.ConvertedName,
"\": ",
SampleValue(originalIndex, param.TypeDescriptor),
i == bodyParams.Count - 1 ? "" : ","));
}
sb.AppendLine("}");
}
}
sb.AppendLine();
sb.AppendLine("###");
sb.AppendLine();
_fileContent[fileName].Append(sb);
return;
string FormatFileName()
{
var name = GetName();
var schema = httpFileOptions.FileMode != HttpFileMode.Schema ? "" :
(endpoint.Routine.Metadata is string moduleName ? moduleName : endpoint.Routine.Schema);
return string.Concat(string.Format(httpFileOptions.NamePattern, name, schema), ".http");
}
}
public void Cleanup()
{
if (httpFileOptions.Option == HttpFileOption.Disabled)
{
return;
}
if (_endpoint)
{
foreach(var (fileName, content) in _fileContent)
{
var path = $"/{fileName}";
_builder.Use(async (context, next) =>
{
if (!(string.Equals(context.Request.Method, "GET", StringComparison.OrdinalIgnoreCase) &&
string.Equals(context.Request.Path, path, StringComparison.Ordinal)))
{
await next(context);
return;
}
context.Response.StatusCode = 200;
context.Response.ContentType = "text/plain";
await context.Response.WriteAsync(content.ToString());
});
var host = GetHost();
Logger?.LogTrace("Exposed HTTP file content on URL: {host}{path}", host, path);
}
}
if (_file)
{
int filesCreated = 0;
foreach(var (fileName, content) in _fileContent)
{
var fullFileName = Path.Combine(Environment.CurrentDirectory, fileName);
if (!httpFileOptions.FileOverwrite && File.Exists(fullFileName))
{
continue;
}
var dir = Path.GetDirectoryName(fullFileName);
if (dir is not null && Directory.Exists(dir) is false)
{
Directory.CreateDirectory(dir);
}
File.WriteAllText(fullFileName, content.ToString());
filesCreated++;
Logger?.LogTrace("Created HTTP file: {fileName}", fileName);
}
if (filesCreated > 0)
{
Logger?.LogDebug("HttpFiles: Created {count} HTTP file(s)", filesCreated);
}
}
}
private void WriteComment(StringBuilder sb, Routine routine)
{
if (httpFileOptions.CommentHeaderIncludeComments is false || string.IsNullOrEmpty(routine.Comment?.Trim()))
{
return;
}
var lines = routine
.Comment
.Split('\n', StringSplitOptions.RemoveEmptyEntries)
.ToArray();
if (lines.Length > 0)
{
sb.AppendLine("//");
}
else
{
return;
}
if (routine.Type == RoutineType.SqlFile)
{
// SQL files: output comment lines directly
foreach (var line in lines)
{
if (line == "\r")
{
continue;
}
sb.AppendLine(string.Concat("// ", line.TrimEnd('\r')));
}
}
else
{
// Functions/procedures: wrap in COMMENT ON statement
foreach (var (line, index) in lines.Select((l, i) => (l, i)))
{
if (line == "\r" && index > 0)
{
continue;
}
var comment = line.Replace("'", "''").TrimEnd('\r');
if (index == 0)
{
comment = string.Concat($"comment on {routine.Type.ToString().ToLowerInvariant()} {routine.Schema}.{routine.Name} is '", comment);
}
else if (index == lines.Length - 1)
{
comment = string.Concat(comment, "';");
}
sb.AppendLine(string.Concat("// ", comment));
}
}
}
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"
};
}
private string GetHost()
{
string? host = null;
if (_builder is WebApplication app)
{
if (app.Urls.Count != 0)
{
host = app.Urls.FirstOrDefault();
}
else
{
var section = app.Configuration?.GetSection("ASPNETCORE_URLS");
if (section?.Value is not null)
{
host = section.Value.Split(";")?.LastOrDefault();
}
}
if (host is null && app.Configuration?["urls"] is not null)
{
host = app.Configuration?["urls"];
}
}
// default, assumed host
host ??= "http://localhost:8080";
return host.TrimEnd('/');
}
private string GetName()
{
if (httpFileOptions.Name is not null)
{
return httpFileOptions.Name;
}
if (httpFileOptions.ConnectionString is not null)
{
return new NpgsqlConnectionStringBuilder(httpFileOptions.ConnectionString).Database ??
httpFileOptions.ConnectionString?.Split(";").Where(s => s.StartsWith("Database=")).FirstOrDefault()
?.Split("=")?.Last() ?? "npgsqlrest";
}
return "npgsqlrest";
}
}
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