SqlClr CURL

Implementation of CURL function using CLR assemblies hosted in SQL Server

samples/features/sql-clr/Curl/.gitignore

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+*.cproj.user
+.vs/*
+.vscode/*
+bin/*
+obj/*
+*.log
+Properties/PublishProfiles/*

samples/features/sql-clr/Curl/Curl.cs

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+using Microsoft.SqlServer.Server;
+using System;
+using System.Data.SqlTypes;
+using System.Net;
+
+/// <summary>
+/// Provides CURL-like functionalities in T-SQL code.
+/// </summary>
+public partial class Curl
+{
+    [SqlFunction]
+    [return: SqlFacet(MaxSize = -1)]
+    public static SqlChars Get(SqlChars H, SqlChars url)
+    {
+        var client = new WebClient();
+        if (!H.IsNull)
+        {
+            var header = H.ToSqlString().Value;
+            if (!string.IsNullOrWhiteSpace(header))
+                client.Headers.Add(header);
+        }
+        return new SqlChars(
+                client.DownloadString(
+                    Uri.EscapeUriString(url.ToSqlString().Value)
+                    ).ToCharArray());   
+    }
+
+    [SqlProcedure]
+    public static void Post(SqlChars H, SqlChars d, SqlChars url)
+    {
+        var client = new WebClient();
+        if (!H.IsNull)
+        {
+            var header = H.ToSqlString().Value;
+            if (!string.IsNullOrWhiteSpace(header))
+                client.Headers.Add(header);
+        }
+        if(d.IsNull)
+            throw new ArgumentException("You must specify data that will be sent to the endpoint", "@d");
+        var response =
+                client.UploadString(
+                    Uri.EscapeUriString(url.ToSqlString().Value),
+                    d.ToSqlString().Value
+                    );
+        SqlContext.Pipe.Send(response);
+    }
+};

samples/features/sql-clr/Curl/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("SqlClrCurl")]
+[assembly: AssemblyDescription("Implementation of CURL command in SQL Server Database Engine")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Microsoft")]
+[assembly: AssemblyProduct("Sql Server GitHub Samples")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("265e0bc3-ad5f-44f3-bb17-c61f77b9847f")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

samples/features/sql-clr/Curl/SqlClrCurl.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>SqlClr</RootNamespace>
+    <AssemblyName>SqlClrCurl</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>SqlClrCurl.pfx</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Curl.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="README.md" />
+    <None Include="SqlClrCurl.pfx" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{508349B6-6B84-4DF5-91F0-309BEEBAD82D}" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include=".gitignore" />
+    <Content Include="SqlClrCurl.sql">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>SqlClrCurl.tt</DependentUpon>
+    </Content>
+    <Content Include="SqlClrCurl.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>SqlClrCurl.sql</LastGenOutput>
+    </Content>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

samples/features/sql-clr/Curl/SqlClrCurl.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.26730.16
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SqlClrCurl", "SqlClrCurl.csproj", "{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{265E0BC3-AD5F-44F3-BB17-C61F77B9847F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {54C7E749-77A3-460D-A89A-5AB7943A1F15}
+	EndGlobalSection
+EndGlobal

samples/features/sql-clr/Curl/SqlClrCurl.sql

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+
+-- Enable CLR
+sp_configure 'clr enabled', 1;
+RECONFIGURE WITH OVERRIDE;
+GO
+
+--Drop the functions if they already exist
+DROP FUNCTION IF EXISTS CURL.XGET
+GO
+DROP PROCEDURE IF EXISTS CURL.XPOST
+GO
+
+--Drop the schema if it already exists
+DROP SCHEMA IF EXISTS CURL;
+GO
+
+--Drop "trusted assembly flag" if it is set 
+
+DECLARE @hash VARBINARY(64);
+
+SELECT @hash = hash
+FROM sys.trusted_assemblies ta
+WHERE ta.description = N'SqlClrCurl'
+
+EXEC sp_drop_trusted_assembly @hash;
+GO
+
+--Drop the assembly if it already exists
+DROP ASSEMBLY IF EXISTS SqlClrCurl;
+GO
+
+
+DECLARE @hash VARBINARY(64);
+SELECT @hash = HASHBYTES('SHA2_512', BulkColumn)
+FROM OPENROWSET(BULK 'C:\GitHub\sql-server-samples\samples\features\sql-clr\Curl\bin\Release\SqlClrCurl.dll', SINGLE_BLOB) AS assembly_content
+
+IF(@hash IS NOT NULL)
+	EXEC sp_add_trusted_assembly @hash, N'SqlClrCurl'
+ELSE
+	PRINT 'Cannot create hash for assembly!'
+GO
+
+--Create the assembly
+CREATE ASSEMBLY SqlClrCurl
+FROM 'C:\GitHub\sql-server-samples\samples\features\sql-clr\Curl\bin\Release\SqlClrCurl.dll'
+WITH PERMISSION_SET = EXTERNAL_ACCESS;
+GO
+
+--Create the schema where CURL modules will be placed.
+CREATE SCHEMA CURL;
+GO
+
+--Create the function/procedure
+CREATE FUNCTION CURL.XGET (@H NVARCHAR(MAX), @url NVARCHAR(4000))
+RETURNS NVARCHAR(MAX)
+AS EXTERNAL NAME SqlClrCurl.Curl.Get;
+GO
+
+CREATE PROCEDURE CURL.XPOST (@H NVARCHAR(MAX), @d NVARCHAR(MAX), @url NVARCHAR(4000))
+AS EXTERNAL NAME SqlClrCurl.Curl.Post;
+GO

samples/features/sql-clr/Curl/SqlClrCurl.tt

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+<#@output extension=".sql"#>
+<#@ template language="C#" hostspecific="True" #>
+
+-- Enable CLR
+sp_configure 'clr enabled', 1;
+RECONFIGURE WITH OVERRIDE;
+GO
+
+--Drop the functions if they already exist
+DROP FUNCTION IF EXISTS CURL.XGET
+GO
+DROP PROCEDURE IF EXISTS CURL.XPOST
+GO
+
+--Drop the schema if it already exists
+DROP SCHEMA IF EXISTS CURL;
+GO
+
+--Drop "trusted assembly flag" if it is set 
+
+DECLARE @hash VARBINARY(64);
+
+SELECT @hash = hash
+FROM sys.trusted_assemblies ta
+WHERE ta.description = N'SqlClrCurl'
+
+EXEC sp_drop_trusted_assembly @hash;
+GO
+
+--Drop the assembly if it already exists
+DROP ASSEMBLY IF EXISTS SqlClrCurl;
+GO
+
+
+DECLARE @hash VARBINARY(64);
+SELECT @hash = HASHBYTES('SHA2_512', BulkColumn)
+FROM OPENROWSET(BULK '<#= this.Host.ResolvePath("bin\\Release\\SqlClrCurl.dll") #>', SINGLE_BLOB) AS assembly_content
+
+IF(@hash IS NOT NULL)
+	EXEC sp_add_trusted_assembly @hash, N'SqlClrCurl'
+ELSE
+	PRINT 'Cannot create hash for assembly!'
+GO
+
+--Create the assembly
+CREATE ASSEMBLY SqlClrCurl
+FROM '<#= this.Host.ResolvePath("bin\\Release\\SqlClrCurl.dll") #>'
+WITH PERMISSION_SET = EXTERNAL_ACCESS;
+GO
+
+--Create the schema where CURL modules will be placed.
+CREATE SCHEMA CURL;
+GO
+
+--Create the function/procedure
+CREATE FUNCTION CURL.XGET (@H NVARCHAR(MAX), @url NVARCHAR(4000))
+RETURNS NVARCHAR(MAX)
+AS EXTERNAL NAME SqlClrCurl.Curl.Get;
+GO
+
+CREATE PROCEDURE CURL.XPOST (@H NVARCHAR(MAX), @d NVARCHAR(MAX), @url NVARCHAR(4000))
+AS EXTERNAL NAME SqlClrCurl.Curl.Post;
+GO