jellyfin-server/RSSDP/CustomHttpHeaders.cs
2017-08-24 15:52:19 -04:00

294 lines
8.5 KiB
C#

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
namespace Rssdp
{
/// <summary>
/// Represents a custom HTTP header sent on device search response or notification messages.
/// </summary>
public sealed class CustomHttpHeader
{
#region Fields
private string _Name;
private string _Value;
#endregion
#region Constructors
/// <summary>
/// Full constructor.
/// </summary>
/// <param name="name">The field name of the header.</param>
/// <param name="value">The value of the header</param>
/// <remarks>
/// <para>As per RFC 822 and 2616, the name must contain only printable ASCII characters (33-126) excluding colon (:). The value may contain any ASCII characters except carriage return or line feed.</para>
/// </remarks>
/// <exception cref="System.ArgumentNullException">Thrown if the name is null.</exception>
/// <exception cref="System.ArgumentException">Thrown if the name is an empty value, or contains an invalid character. Also thrown if the value contains a \r or \n character.</exception>
public CustomHttpHeader(string name, string value)
{
Name = name;
Value = value;
}
#endregion
#region Public Properties
/// <summary>
/// Return the name of this header.
/// </summary>
public string Name
{
get { return _Name; }
private set
{
EnsureValidName(value);
_Name = value;
}
}
/// <summary>
/// Returns the value of this header.
/// </summary>
public string Value
{
get { return _Value; }
private set
{
EnsureValidValue(value);
_Value = value;
}
}
#endregion
#region Overrides
/// <summary>
/// Returns the header formatted for use in an HTTP message.
/// </summary>
/// <returns>A string representing this header in the format of 'name: value'.</returns>
public override string ToString()
{
return this.Name + ": " + this.Value;
}
#endregion
#region Private Methods
private static void EnsureValidName(string name)
{
if (name == null) throw new ArgumentNullException(nameof(name), "Name cannot be null.");
if (name.Length == 0) throw new ArgumentException("Name cannot be blank.", nameof(name));
foreach (var c in name)
{
var b = (byte)c;
if (c == ':' || b < 33 || b > 126) throw new ArgumentException("Name contains illegal characters.", nameof(name));
}
}
private static void EnsureValidValue(string value)
{
if (String.IsNullOrEmpty(value)) return;
if (value.Contains("\r") || value.Contains("\n")) throw new ArgumentException("Invalid value.", nameof(value));
}
#endregion
}
/// <summary>
/// Represents a collection of custom HTTP headers, keyed by name.
/// </summary>
public class CustomHttpHeadersCollection : IEnumerable<CustomHttpHeader>
{
#region Fields
private IDictionary<string, CustomHttpHeader> _Headers;
#endregion
#region Constructors
/// <summary>
/// Default constructor.
/// </summary>
public CustomHttpHeadersCollection()
{
_Headers = new Dictionary<string, CustomHttpHeader>();
}
/// <summary>
/// Full constructor.
/// </summary>
/// <param name="capacity">Specifies the initial capacity of the collection.</param>
public CustomHttpHeadersCollection(int capacity)
{
_Headers = new Dictionary<string, CustomHttpHeader>(capacity);
}
#endregion
#region Public Methpds
/// <summary>
/// Adds a <see cref="CustomHttpHeader"/> instance to the collection.
/// </summary>
/// <param name="header">The <see cref="CustomHttpHeader"/> instance to add to the collection.</param>
/// <remarks>
/// <para></para>
/// </remarks>
/// <exception cref="System.ArgumentNullException">Thrown if <paramref name="header"/> is null.</exception>
public void Add(CustomHttpHeader header)
{
if (header == null) throw new ArgumentNullException(nameof(header));
lock (_Headers)
{
_Headers.Add(header.Name, header);
}
}
#region Remove Overloads
/// <summary>
/// Removes the specified header instance from the collection.
/// </summary>
/// <param name="header">The <see cref="CustomHttpHeader"/> instance to remove from the collection.</param>
/// <remarks>
/// <para>Only removes the specified header if that instance was in the collection, if another header with the same name exists in the collection it is not removed.</para>
/// </remarks>
/// <returns>True if an item was removed from the collection, otherwise false (because it did not exist or was not the same instance).</returns>
/// <seealso cref="Remove(string)"/>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="header"/> is null.</exception>
public bool Remove(CustomHttpHeader header)
{
if (header == null) throw new ArgumentNullException(nameof(header));
lock (_Headers)
{
if (_Headers.ContainsKey(header.Name) && _Headers[header.Name] == header)
return _Headers.Remove(header.Name);
}
return false;
}
/// <summary>
/// Removes the property with the specified key (<see cref="CustomHttpHeader.Name"/> from the collection.
/// </summary>
/// <param name="headerName">The name of the <see cref="CustomHttpHeader"/> instance to remove from the collection.</param>
/// <returns>True if an item was removed from the collection, otherwise false (because no item exists in the collection with that key).</returns>
/// <exception cref="System.ArgumentException">Thrown if the <paramref name="headerName"/> argument is null or empty string.</exception>
public bool Remove(string headerName)
{
if (String.IsNullOrEmpty(headerName)) throw new ArgumentException("headerName cannot be null or empty.", nameof(headerName));
lock (_Headers)
{
return _Headers.Remove(headerName);
}
}
#endregion
/// <summary>
/// Returns a boolean indicating whether or not the specified <see cref="CustomHttpHeader"/> instance is in the collection.
/// </summary>
/// <param name="header">An <see cref="CustomHttpHeader"/> instance to check the collection for.</param>
/// <returns>True if the specified instance exists in the collection, otherwise false.</returns>
public bool Contains(CustomHttpHeader header)
{
if (header == null) throw new ArgumentNullException(nameof(header));
lock (_Headers)
{
if (_Headers.ContainsKey(header.Name))
return _Headers[header.Name] == header;
}
return false;
}
/// <summary>
/// Returns a boolean indicating whether or not a <see cref="CustomHttpHeader"/> instance with the specified full name value exists in the collection.
/// </summary>
/// <param name="headerName">A string containing the full name of the <see cref="CustomHttpHeader"/> instance to check for.</param>
/// <returns>True if an item with the specified full name exists in the collection, otherwise false.</returns>
public bool Contains(string headerName)
{
if (String.IsNullOrEmpty(headerName)) throw new ArgumentException("headerName cannot be null or empty.", nameof(headerName));
lock (_Headers)
{
return _Headers.ContainsKey(headerName);
}
}
#endregion
#region Public Properties
/// <summary>
/// Returns the number of items in the collection.
/// </summary>
public int Count
{
get { return _Headers.Count; }
}
/// <summary>
/// Returns the <see cref="CustomHttpHeader"/> instance from the collection that has the specified <see cref="CustomHttpHeader.Name"/> value.
/// </summary>
/// <param name="name">The full name of the property to return.</param>
/// <returns>A <see cref="CustomHttpHeader"/> instance from the collection.</returns>
/// <exception cref="System.Collections.Generic.KeyNotFoundException">Thrown if no item exists in the collection with the specified <paramref name="name"/> value.</exception>
public CustomHttpHeader this[string name]
{
get
{
return _Headers[name];
}
}
#endregion
#region IEnumerable Members
/// <summary>
/// Returns an enumerator of <see cref="CustomHttpHeader"/> instances in this collection.
/// </summary>
/// <returns>An enumerator of <see cref="CustomHttpHeader"/> instances in this collection.</returns>
public IEnumerator<CustomHttpHeader> GetEnumerator()
{
lock (_Headers)
{
return _Headers.Values.GetEnumerator();
}
}
/// <summary>
/// Returns an enumerator of <see cref="CustomHttpHeader"/> instances in this collection.
/// </summary>
/// <returns>An enumerator of <see cref="CustomHttpHeader"/> instances in this collection.</returns>
IEnumerator IEnumerable.GetEnumerator()
{
lock (_Headers)
{
return _Headers.Values.GetEnumerator();
}
}
#endregion
}
}