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using System;
using System.Diagnostics.CodeAnalysis;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Npgsql.Internal;
using Npgsql.Internal.ResolverFactories;
using Npgsql.TypeMapping;
using NpgsqlTypes;
namespace Npgsql;
/// <summary>
/// Provides a simple API for configuring and creating an <see cref="NpgsqlDataSource" />, from which database connections can be obtained.
/// </summary>
public sealed class NpgsqlDataSourceBuilder : INpgsqlTypeMapper
{
static UnsupportedTypeInfoResolver<NpgsqlDataSourceBuilder> UnsupportedTypeInfoResolver { get; } = new();
readonly NpgsqlSlimDataSourceBuilder _internalBuilder;
/// <summary>
/// A diagnostics name used by Npgsql when generating tracing, logging and metrics.
/// </summary>
public string? Name
{
get => _internalBuilder.Name;
set => _internalBuilder.Name = value;
}
/// <inheritdoc />
public INpgsqlNameTranslator DefaultNameTranslator
{
get => _internalBuilder.DefaultNameTranslator;
set => _internalBuilder.DefaultNameTranslator = value;
}
/// <summary>
/// A connection string builder that can be used to configured the connection string on the builder.
/// </summary>
public NpgsqlConnectionStringBuilder ConnectionStringBuilder => _internalBuilder.ConnectionStringBuilder;
/// <summary>
/// Returns the connection string, as currently configured on the builder.
/// </summary>
public string ConnectionString => _internalBuilder.ConnectionString;
internal static void ResetGlobalMappings(bool overwrite)
=> GlobalTypeMapper.Instance.AddGlobalTypeMappingResolvers(new PgTypeInfoResolverFactory[]
{
overwrite ? new AdoTypeInfoResolverFactory() : AdoTypeInfoResolverFactory.Instance,
new ExtraConversionResolverFactory(),
new JsonTypeInfoResolverFactory(),
new RecordTypeInfoResolverFactory(),
new FullTextSearchTypeInfoResolverFactory(),
new NetworkTypeInfoResolverFactory(),
new GeometricTypeInfoResolverFactory(),
new LTreeTypeInfoResolverFactory(),
}, static () =>
{
var builder = new PgTypeInfoResolverChainBuilder();
builder.EnableRanges();
builder.EnableMultiranges();
builder.EnableArrays();
return builder;
}, overwrite);
static NpgsqlDataSourceBuilder()
=> ResetGlobalMappings(overwrite: false);
/// <summary>
/// Constructs a new <see cref="NpgsqlDataSourceBuilder" />, optionally starting out from the given <paramref name="connectionString"/>.
/// </summary>
public NpgsqlDataSourceBuilder(string? connectionString = null)
{
_internalBuilder = new(new NpgsqlConnectionStringBuilder(connectionString));
_internalBuilder.ConfigureDefaultFactories = static instance =>
{
instance.AppendDefaultFactories();
instance.AppendResolverFactory(new ExtraConversionResolverFactory());
instance.AppendResolverFactory(new JsonTypeInfoResolverFactory(instance.JsonSerializerOptions));
instance.AppendResolverFactory(new RecordTypeInfoResolverFactory());
instance.AppendResolverFactory(new FullTextSearchTypeInfoResolverFactory());
instance.AppendResolverFactory(new NetworkTypeInfoResolverFactory());
instance.AppendResolverFactory(new GeometricTypeInfoResolverFactory());
instance.AppendResolverFactory(new LTreeTypeInfoResolverFactory());
};
_internalBuilder.ConfigureResolverChain = static chain => chain.Add(UnsupportedTypeInfoResolver);
_internalBuilder.EnableTransportSecurity();
_internalBuilder.EnableIntegratedSecurity();
_internalBuilder.EnableRanges();
_internalBuilder.EnableMultiranges();
_internalBuilder.EnableArrays();
}
/// <summary>
/// Sets the <see cref="ILoggerFactory" /> that will be used for logging.
/// </summary>
/// <param name="loggerFactory">The logger factory to be used.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseLoggerFactory(ILoggerFactory? loggerFactory)
{
_internalBuilder.UseLoggerFactory(loggerFactory);
return this;
}
/// <summary>
/// Enables parameters to be included in logging. This includes potentially sensitive information from data sent to PostgreSQL.
/// You should only enable this flag in development, or if you have the appropriate security measures in place based on the
/// sensitivity of this data.
/// </summary>
/// <param name="parameterLoggingEnabled">If <see langword="true" />, then sensitive data is logged.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder EnableParameterLogging(bool parameterLoggingEnabled = true)
{
_internalBuilder.EnableParameterLogging(parameterLoggingEnabled);
return this;
}
/// <summary>
/// Configures the JSON serializer options used when reading and writing all System.Text.Json data.
/// </summary>
/// <param name="serializerOptions">Options to customize JSON serialization and deserialization.</param>
/// <returns></returns>
public NpgsqlDataSourceBuilder ConfigureJsonOptions(JsonSerializerOptions serializerOptions)
{
_internalBuilder.ConfigureJsonOptions(serializerOptions);
return this;
}
/// <summary>
/// Sets up dynamic System.Text.Json mappings. This allows mapping arbitrary .NET types to PostgreSQL <c>json</c> and <c>jsonb</c>
/// types, as well as <see cref="JsonNode" /> and its derived types.
/// </summary>
/// <param name="jsonbClrTypes">
/// A list of CLR types to map to PostgreSQL <c>jsonb</c> (no need to specify <see cref="NpgsqlDbType.Jsonb" />).
/// </param>
/// <param name="jsonClrTypes">
/// A list of CLR types to map to PostgreSQL <c>json</c> (no need to specify <see cref="NpgsqlDbType.Json" />).
/// </param>
/// <remarks>
/// Due to the dynamic nature of these mappings, they are not compatible with NativeAOT or trimming.
/// </remarks>
[RequiresUnreferencedCode("Json serializer may perform reflection on trimmed types.")]
[RequiresDynamicCode("Serializing arbitrary types to json can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
public NpgsqlDataSourceBuilder EnableDynamicJson(Type[]? jsonbClrTypes = null, Type[]? jsonClrTypes = null)
{
_internalBuilder.EnableDynamicJson(jsonbClrTypes, jsonClrTypes);
return this;
}
/// <summary>
/// Sets up mappings for the PostgreSQL <c>record</c> type as a .NET <see cref="ValueTuple" /> or <see cref="Tuple" />.
/// </summary>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
[RequiresUnreferencedCode("The mapping of PostgreSQL records as .NET tuples requires reflection usage which is incompatible with trimming.")]
[RequiresDynamicCode("The mapping of PostgreSQL records as .NET tuples requires dynamic code usage which is incompatible with NativeAOT.")]
public NpgsqlDataSourceBuilder EnableRecordsAsTuples()
{
AddTypeInfoResolverFactory(new TupledRecordTypeInfoResolverFactory());
return this;
}
/// <summary>
/// Sets up mappings allowing the use of unmapped enum, range and multirange types.
/// </summary>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
[RequiresUnreferencedCode("The use of unmapped enums, ranges or multiranges requires reflection usage which is incompatible with trimming.")]
[RequiresDynamicCode("The use of unmapped enums, ranges or multiranges requires dynamic code usage which is incompatible with NativeAOT.")]
public NpgsqlDataSourceBuilder EnableUnmappedTypes()
{
AddTypeInfoResolverFactory(new UnmappedTypeInfoResolverFactory());
return this;
}
#region Authentication
/// <summary>
/// When using SSL/TLS, this is a callback that allows customizing how the PostgreSQL-provided certificate is verified. This is an
/// advanced API, consider using <see cref="SslMode.VerifyFull" /> or <see cref="SslMode.VerifyCA" /> instead.
/// </summary>
/// <param name="userCertificateValidationCallback">The callback containing custom callback verification logic.</param>
/// <remarks>
/// <para>
/// Cannot be used in conjunction with <see cref="SslMode.Disable" />, <see cref="SslMode.VerifyCA" /> or
/// <see cref="SslMode.VerifyFull" />.
/// </para>
/// <para>
/// See <see href="https://msdn.microsoft.com/en-us/library/system.net.security.remotecertificatevalidationcallback(v=vs.110).aspx"/>.
/// </para>
/// </remarks>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseUserCertificateValidationCallback(RemoteCertificateValidationCallback userCertificateValidationCallback)
{
_internalBuilder.UseUserCertificateValidationCallback(userCertificateValidationCallback);
return this;
}
/// <summary>
/// Specifies an SSL/TLS certificate which Npgsql will send to PostgreSQL for certificate-based authentication.
/// </summary>
/// <param name="clientCertificate">The client certificate to be sent to PostgreSQL when opening a connection.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseClientCertificate(X509Certificate? clientCertificate)
{
_internalBuilder.UseClientCertificate(clientCertificate);
return this;
}
/// <summary>
/// Specifies a collection of SSL/TLS certificates which Npgsql will send to PostgreSQL for certificate-based authentication.
/// </summary>
/// <param name="clientCertificates">The client certificate collection to be sent to PostgreSQL when opening a connection.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseClientCertificates(X509CertificateCollection? clientCertificates)
{
_internalBuilder.UseClientCertificates(clientCertificates);
return this;
}
/// <summary>
/// Specifies a callback to modify the collection of SSL/TLS client certificates which Npgsql will send to PostgreSQL for
/// certificate-based authentication. This is an advanced API, consider using <see cref="UseClientCertificate" /> or
/// <see cref="UseClientCertificates" /> instead.
/// </summary>
/// <param name="clientCertificatesCallback">The callback to modify the client certificate collection.</param>
/// <remarks>
/// <para>
/// The callback is invoked every time a physical connection is opened, and is therefore suitable for rotating short-lived client
/// certificates. Simply make sure the certificate collection argument has the up-to-date certificate(s).
/// </para>
/// <para>
/// The callback's collection argument already includes any client certificates specified via the connection string or environment
/// variables.
/// </para>
/// </remarks>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseClientCertificatesCallback(Action<X509CertificateCollection>? clientCertificatesCallback)
{
_internalBuilder.UseClientCertificatesCallback(clientCertificatesCallback);
return this;
}
/// <summary>
/// Sets the <see cref="X509Certificate2" /> that will be used validate SSL certificate, received from the server.
/// </summary>
/// <param name="rootCertificate">The CA certificate.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UseRootCertificate(X509Certificate2? rootCertificate)
{
_internalBuilder.UseRootCertificate(rootCertificate);
return this;
}
/// <summary>
/// Specifies a callback that will be used to validate SSL certificate, received from the server.
/// </summary>
/// <param name="rootCertificateCallback">The callback to get CA certificate.</param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
/// <remarks>
/// This overload, which accepts a callback, is suitable for scenarios where the certificate rotates
/// and might change during the lifetime of the application.
/// When that's not the case, use the overload which directly accepts the certificate.
/// </remarks>
public NpgsqlDataSourceBuilder UseRootCertificateCallback(Func<X509Certificate2>? rootCertificateCallback)
{
_internalBuilder.UseRootCertificateCallback(rootCertificateCallback);
return this;
}
/// <summary>
/// Configures a periodic password provider, which is automatically called by the data source at some regular interval. This is the
/// recommended way to fetch a rotating access token.
/// </summary>
/// <param name="passwordProvider">A callback which returns the password to be sent to PostgreSQL.</param>
/// <param name="successRefreshInterval">How long to cache the password before re-invoking the callback.</param>
/// <param name="failureRefreshInterval">
/// If a password refresh attempt fails, it will be re-attempted with this interval.
/// This should typically be much lower than <paramref name="successRefreshInterval" />.
/// </param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
/// <remarks>
/// <para>
/// The provided callback is invoked in a timer, and not when opening connections. It therefore doesn't affect opening time.
/// </para>
/// <para>
/// The provided cancellation token is only triggered when the entire data source is disposed. If you'd like to apply a timeout to the
/// token fetching, do so within the provided callback.
/// </para>
/// </remarks>
public NpgsqlDataSourceBuilder UsePeriodicPasswordProvider(
Func<NpgsqlConnectionStringBuilder, CancellationToken, ValueTask<string>>? passwordProvider,
TimeSpan successRefreshInterval,
TimeSpan failureRefreshInterval)
{
_internalBuilder.UsePeriodicPasswordProvider(passwordProvider, successRefreshInterval, failureRefreshInterval);
return this;
}
/// <summary>
/// Configures a password provider, which is called by the data source when opening connections.
/// </summary>
/// <param name="passwordProvider">
/// A callback that may be invoked during <see cref="NpgsqlConnection.Open()" /> which returns the password to be sent to PostgreSQL.
/// </param>
/// <param name="passwordProviderAsync">
/// A callback that may be invoked during <see cref="NpgsqlConnection.OpenAsync(CancellationToken)" /> which returns the password to be sent to PostgreSQL.
/// </param>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
/// <remarks>
/// <para>
/// The provided callback is invoked when opening connections. Therefore its important the callback internally depends on cached
/// data or returns quickly otherwise. Any unnecessary delay will affect connection opening time.
/// </para>
/// </remarks>
public NpgsqlDataSourceBuilder UsePasswordProvider(
Func<NpgsqlConnectionStringBuilder, string>? passwordProvider,
Func<NpgsqlConnectionStringBuilder, CancellationToken, ValueTask<string>>? passwordProviderAsync)
{
_internalBuilder.UsePasswordProvider(passwordProvider, passwordProviderAsync);
return this;
}
#endregion Authentication
#region Type mapping
/// <inheritdoc />
public void AddTypeInfoResolverFactory(PgTypeInfoResolverFactory factory)
=> _internalBuilder.AddTypeInfoResolverFactory(factory);
/// <inheritdoc />
void INpgsqlTypeMapper.Reset() => ((INpgsqlTypeMapper)_internalBuilder).Reset();
/// <inheritdoc />
public INpgsqlTypeMapper MapEnum<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields)] TEnum>(string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
where TEnum : struct, Enum
{
_internalBuilder.MapEnum<TEnum>(pgName, nameTranslator);
return this;
}
/// <inheritdoc />
public bool UnmapEnum<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields)] TEnum>(string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
where TEnum : struct, Enum
=> _internalBuilder.UnmapEnum<TEnum>(pgName, nameTranslator);
/// <inheritdoc />
[RequiresDynamicCode("Calling MapEnum with a Type can require creating new generic types or methods. This may not work when AOT compiling.")]
public INpgsqlTypeMapper MapEnum([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)]
Type clrType, string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
=> _internalBuilder.MapEnum(clrType, pgName, nameTranslator);
/// <inheritdoc />
public bool UnmapEnum([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)]
Type clrType, string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
=> _internalBuilder.UnmapEnum(clrType, pgName, nameTranslator);
/// <inheritdoc />
[RequiresDynamicCode("Mapping composite types involves serializing arbitrary types which can require creating new generic types or methods. This is currently unsupported with NativeAOT, vote on issue #5303 if this is important to you.")]
public INpgsqlTypeMapper MapComposite<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicFields)] T>(
string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
{
_internalBuilder.MapComposite<T>(pgName, nameTranslator);
return this;
}
/// <inheritdoc />
[RequiresDynamicCode("Mapping composite types involves serializing arbitrary types which can require creating new generic types or methods. This is currently unsupported with NativeAOT, vote on issue #5303 if this is important to you.")]
public INpgsqlTypeMapper MapComposite([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicFields)]
Type clrType, string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
{
_internalBuilder.MapComposite(clrType, pgName, nameTranslator);
return this;
}
/// <inheritdoc />
[RequiresDynamicCode("Mapping composite types involves serializing arbitrary types which can require creating new generic types or methods. This is currently unsupported with NativeAOT, vote on issue #5303 if this is important to you.")]
public bool UnmapComposite<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicFields)] T>(
string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
=> _internalBuilder.UnmapComposite<T>(pgName, nameTranslator);
/// <inheritdoc />
[RequiresDynamicCode("Mapping composite types involves serializing arbitrary types which can require creating new generic types or methods. This is currently unsupported with NativeAOT, vote on issue #5303 if this is important to you.")]
public bool UnmapComposite([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicFields)]
Type clrType, string? pgName = null, INpgsqlNameTranslator? nameTranslator = null)
=> _internalBuilder.UnmapComposite(clrType, pgName, nameTranslator);
#endregion Type mapping
/// <summary>
/// Register a connection initializer, which allows executing arbitrary commands when a physical database connection is first opened.
/// </summary>
/// <param name="connectionInitializer">
/// A synchronous connection initialization lambda, which will be called from <see cref="NpgsqlConnection.Open()" /> when a new physical
/// connection is opened.
/// </param>
/// <param name="connectionInitializerAsync">
/// An asynchronous connection initialization lambda, which will be called from
/// <see cref="NpgsqlConnection.OpenAsync(CancellationToken)" /> when a new physical connection is opened.
/// </param>
/// <remarks>
/// If an initializer is registered, both sync and async versions must be provided. If you do not use sync APIs in your code, simply
/// throw <see cref="NotSupportedException" />, which would also catch accidental cases of sync opening.
/// </remarks>
/// <remarks>
/// Take care that the setting you apply in the initializer does not get reverted when the connection is returned to the pool, since
/// Npgsql sends <c>DISCARD ALL</c> by default. The <see cref="NpgsqlConnectionStringBuilder.NoResetOnClose" /> option can be used to
/// turn this off.
/// </remarks>
/// <returns>The same builder instance so that multiple calls can be chained.</returns>
public NpgsqlDataSourceBuilder UsePhysicalConnectionInitializer(
Action<NpgsqlConnection>? connectionInitializer,
Func<NpgsqlConnection, Task>? connectionInitializerAsync)
{
_internalBuilder.UsePhysicalConnectionInitializer(connectionInitializer, connectionInitializerAsync);
return this;
}
/// <summary>
/// Builds and returns an <see cref="NpgsqlDataSource" /> which is ready for use.
/// </summary>
public NpgsqlDataSource Build()
=> _internalBuilder.Build();
/// <summary>
/// Builds and returns a <see cref="NpgsqlMultiHostDataSource" /> which is ready for use for load-balancing and failover scenarios.
/// </summary>
public NpgsqlMultiHostDataSource BuildMultiHost()
=> _internalBuilder.BuildMultiHost();
INpgsqlTypeMapper INpgsqlTypeMapper.ConfigureJsonOptions(JsonSerializerOptions serializerOptions)
=> ConfigureJsonOptions(serializerOptions);
[RequiresUnreferencedCode("Json serializer may perform reflection on trimmed types.")]
[RequiresDynamicCode(
"Serializing arbitrary types to json can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
INpgsqlTypeMapper INpgsqlTypeMapper.EnableDynamicJson(Type[]? jsonbClrTypes, Type[]? jsonClrTypes)
=> EnableDynamicJson(jsonbClrTypes, jsonClrTypes);
[RequiresUnreferencedCode(
"The mapping of PostgreSQL records as .NET tuples requires reflection usage which is incompatible with trimming.")]
[RequiresDynamicCode(
"The mapping of PostgreSQL records as .NET tuples requires dynamic code usage which is incompatible with NativeAOT.")]
INpgsqlTypeMapper INpgsqlTypeMapper.EnableRecordsAsTuples()
=> EnableRecordsAsTuples();
[RequiresUnreferencedCode(
"The use of unmapped enums, ranges or multiranges requires reflection usage which is incompatible with trimming.")]
[RequiresDynamicCode(
"The use of unmapped enums, ranges or multiranges requires dynamic code usage which is incompatible with NativeAOT.")]
INpgsqlTypeMapper INpgsqlTypeMapper.EnableUnmappedTypes()
=> EnableUnmappedTypes();
}