/// <summary>
/// Parses a HTTP header from a HTTP/2 header collection
/// </summary>
/// <param name="headers">the header collection including pseudo headers</param>
/// <param name="methodResolver">the method resolver</param>
/// <returns>an optional used to determine if the invoker should listen for a payload</returns>
public static HttpParserOptional ParseFrom(HttpHeaderCollection headers,
MethodResolver <HttpMethod> methodResolver)
{
return(new HttpParserOptional
{
ExpectPayload = methodResolver.GetMethod(Encoding.UTF8.GetBytes(headers[":method"])).ExpectPayload ||
headers.ContainsKey("content-length") && headers["content-length"] != "0",
Headers = headers,
MethodResolver = methodResolver,
Payload = null
});
}
/// <summary>
/// Creates and populates this collection from a <see cref="HttpHeaderCollection"/>, and optionally make it read-only
/// </summary>
/// <param name="headers"></param>
/// <param name="readOnly"></param>
public HttpCookieCollection(HttpHeaderCollection headers, bool readOnly = false)
{
_cookies = new List <HttpCookie>();
foreach (var headerField in headers)
{
if (headerField.Name == "cookie")
{
_cookies.AddRange(HttpCookie.Parse(headerField.Value));
}
}
_readOnly = readOnly;
}
/// <summary>
/// Instantiates with the given <see cref="HttpHeaderCollection" />, payload, and method resolver.
/// </summary>
/// <param name="headers">
/// a collection of HTTP/2 headers with pseudo headers included (:method, :scheme, :authority, :path,
/// and (optionally), :version
/// </param>
/// <param name="payload">the request payload (can be null)</param>
/// <param name="methodResolver">
/// a method resolver to use to map the method name to a server-implemented
/// <see cref="HttpMethod" />
/// </param>
public HttpRequest(HttpHeaderCollection headers, byte[] payload,
MethodResolver <HttpMethod> methodResolver)
{
if (payload != null)
{
InputStream = new MemoryStream(payload);
}
Method = methodResolver.GetMethod(Encoding.UTF8.GetBytes(headers[":method"].ToUpper()));
RawMethod = headers[":method"];
Url = new Uri(headers[":scheme"] + "://" + headers[":authority"] + headers[":path"]);
RawUrl = headers[":path"];
Headers = new HttpHeaderCollection(headers.Where <HeaderField>(x => !x.Name.StartsWith(":")));
InputStream = payload == null ? new MemoryStream() : new MemoryStream(payload);
#pragma warning disable 618
Protocol = headers.ContainsKey(":version") ? headers[":version"] : null;
#pragma warning restore 618
Cookies = new HttpCookieCollection(headers, true);
}
/// <summary>
/// Parses a HTTP header from a string
/// </summary>
/// <param name="requestHeader">the header to parse</param>
/// <param name="methodResolver">the method resolver</param>
/// <param name="connection">
/// the connection that the requestHeader was sourced from. Used to determine the scheme
/// (http/https)
/// </param>
/// <returns>an optional that will determine the next steps of context construction</returns>
/// <exception cref="BadRequestException">the request was of an invalid structure</exception>
public static HttpParserOptional ParseFrom(string requestHeader, MethodResolver <HttpMethod> methodResolver,
IConnection connection)
{
var lines = requestHeader.Split(new[] { "\r\n" }, StringSplitOptions.None);
if (lines.Length < 1)
{
throw new BadRequestException("Bad Request (HTTP/1 parser failure)",
new ArgumentException("Request header contains less than one line", nameof(requestHeader)));
}
var rparts = lines[0].Split(' ');
var method = rparts.First();
var path = rparts.Where(part => part != rparts[0]).Where(part => part != rparts[rparts.Length - 1])
.Aggregate("", (current, part) => current + part + " ").TrimEnd();
var proto = rparts.Last();
if (string.IsNullOrEmpty(method) ||
string.IsNullOrEmpty(path) ||
string.IsNullOrEmpty(proto))
{
throw new BadRequestException("Bad Request (HTTP/1 parser failure)",
new NullReferenceException(
"The method, path, and/or protocol parameters aren't present in the request line"));
}
var headers = new HttpHeaderCollection(new Dictionary <string, string>
{
{ ":method", method },
{ ":path", path },
{ ":version", proto },
{
":scheme",
connection.GetType().FullName == "Ultz.SimpleServer.Common.SslListener.SecureConnection"
? "https"
: "http"
}
}.Select(x => new HeaderField {
Name = x.Key, Value = x.Value
}));
for (var i = 1; i < lines.Length; i++)
{
var line = lines[i];
var colonIdx = line.IndexOf(':');
if (colonIdx == -1)
{
throw new BadRequestException("Bad Request (HTTP/1 parser failure)");
}
var name = line.Substring(0, colonIdx).Trim().ToLowerInvariant();
var value = line.Substring(colonIdx + 1).Trim();
if (name == "host")
{
name = ":authority";
}
headers[name] = value;
}
return(new HttpParserOptional
{
ExpectPayload = methodResolver.GetMethod(Encoding.UTF8.GetBytes(headers[":method"])).ExpectPayload ||
headers.ContainsKey("content-length") && headers["content-length"] != "0",
Headers = headers,
MethodResolver = methodResolver,
Payload = null
});
}
