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mirror of synced 2024-11-05 02:59:16 +00:00

Build a connectionstring parser, needs integration and testing

This commit is contained in:
Menno van Lavieren 2017-06-23 18:07:53 +02:00
parent 80ac032f18
commit 451bedd4e0
2 changed files with 126 additions and 0 deletions

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@ -0,0 +1,125 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tapeti.Helpers
{
public class ConnectionstringParser
{
readonly TapetiConnectionParams result = new TapetiConnectionParams();
readonly string connectionstring;
int pos = -1;
char current = '\0';
public static TapetiConnectionParams Parse(string connectionstring)
{
return new ConnectionstringParser(connectionstring).result;
}
private ConnectionstringParser(string connectionstring)
{
this.connectionstring = connectionstring;
while (MoveNext())
{
ParseKV();
}
}
private void ParseKV()
{
var key = ParseKey();
if (current == '=')
{
MoveNext();
var value = ParseValue();
SetValue(key, value);
}
else
{
EnableKey(key);
}
}
private string ParseKey()
{
var keyBuilder = new StringBuilder();
do
{
switch (current)
{
case '=':
case ';':
return keyBuilder.ToString();
case '"':
break;
default:
keyBuilder.Append(current);
break;
}
}
while (MoveNext());
return keyBuilder.ToString();
}
private string ParseValue()
{
var valueBuilder = new StringBuilder();
if (current == '"')
{
while (current == '"') // support two double quotes to be an escaped quote
{
while (MoveNext() && current != '"')
{
valueBuilder.Append(current);
}
MoveNext(); // consume the trailing double quote
}
}
else
{
while (current != ';')
valueBuilder.Append(current);
}
// Always leave the ';' to be consumed by the caller
return valueBuilder.ToString();
}
private bool MoveNext()
{
var n = pos + 1;
if (n < connectionstring.Length)
{
pos = n;
current = connectionstring[pos];
return true;
}
pos = connectionstring.Length;
current = '\0';
return false;
}
private void EnableKey(string key)
{
}
private void SetValue(string key, string value)
{
switch (key.ToLowerInvariant()) {
case "HostName": result.HostName = value; break;
case "Port": result.Port = int.Parse(value); break;
case "VirtualHost": result.VirtualHost = value; break;
case "Username": result.Username = value; break;
case "Password": result.Password = value; break;
case "PrefetchCount": result.PrefetchCount = ushort.Parse(value); break;
}
}
}
}

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@ -68,6 +68,7 @@
<Compile Include="Default\NamespaceMatchExchangeStrategy.cs" />
<Compile Include="Default\RequeueExceptionStrategy.cs" />
<Compile Include="Default\TypeNameRoutingKeyStrategy.cs" />
<Compile Include="Helpers\ConnectionstringParser.cs" />
<Compile Include="Helpers\ConsoleHelper.cs" />
<Compile Include="Helpers\MiddlewareHelper.cs" />
<Compile Include="Helpers\TaskTypeHelper.cs" />