//
// System.Net.HttpListenerRequest
//
// Author:
// Gonzalo Paniagua Javier (gonzalo@novell.com)
//
// Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0 && SECURITY_DEP
using System.Collections;
using System.Collections.Specialized;
using System.Globalization;
using System.IO;
using System.Security.Cryptography.X509Certificates;
using System.Text;
namespace System.Net{
public sealed class HttpListenerRequest
{
string [] accept_types;
// int client_cert_error;
// bool no_get_certificate;
Encoding content_encoding;
long content_length;
bool cl_set;
CookieCollection cookies;
WebHeaderCollection headers;
string method;
Stream input_stream;
Version version;
NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
string raw_url;
Guid identifier;
Uri url;
Uri referrer;
string [] user_languages;
HttpListenerContext context;
bool is_chunked;
static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
static readonly string [] no_body_methods = new string [] {
"GET", "HEAD", "DELETE" };
internal HttpListenerRequest (HttpListenerContext context)
{
this.context = context;
headers = new WebHeaderCollection ();
input_stream = Stream.Null;
version = HttpVersion.Version10;
}
static char [] separators = new char [] { ' ' };
internal void SetRequestLine (string req)
{
string [] parts = req.Split (separators, 3);
if (parts.Length != 3) {
context.ErrorMessage = "Invalid request line (parts).";
return;
}
method = parts [0];
foreach (char c in method){
int ic = (int) c;
if ((ic >= 'A' && ic <= 'Z') ||
(ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
continue;
context.ErrorMessage = "(Invalid verb)";
return;
}
raw_url = parts [1];
if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
context.ErrorMessage = "Invalid request line (version).";
return;
}
try {
version = new Version (parts [2].Substring (5));
if (version.Major < 1)
throw new Exception ();
} catch {
context.ErrorMessage = "Invalid request line (version).";
return;
}
}
void CreateQueryString (string query)
{
query_string = new NameValueCollection ();
if (query == null || query.Length == 0)
return;
if (query [0] == '?')
query = query.Substring (1);
string [] components = query.Split ('&');
foreach (string kv in components) {
int pos = kv.IndexOf ('=');
if (pos == -1) {
query_string.Add (null, HttpUtility.UrlDecode (kv));
} else {
string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
query_string.Add (key, val);
}
}
}
internal void FinishInitialization ()
{
string host = UserHostName;
if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
context.ErrorMessage = "Invalid host name";
return;
}
string path;
Uri raw_uri;
if (Uri.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
path = raw_uri.PathAndQuery;
else
path = raw_url;
if ((host == null || host.Length == 0))
host = UserHostAddress;
if (raw_uri != null)
host = raw_uri.Host;
int colon = host.IndexOf (':');
if (colon >= 0)
host = host.Substring (0, colon);
string base_uri = String.Format ("{0}://{1}:{2}",
(IsSecureConnection) ? "https" : "http",
host,
LocalEndPoint.Port);
if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
context.ErrorMessage = "Invalid url: " + base_uri + path;
return;
}
CreateQueryString (url.Query);
string t_encoding = null;
if (version >= HttpVersion.Version11) {
t_encoding = Headers ["Transfer-Encoding"];
// 'identity' is not valid!
if (t_encoding != null && t_encoding != "chunked") {
context.Connection.SendError (null, 501);
return;
}
}
is_chunked = (t_encoding == "chunked");
foreach (string m in no_body_methods)
if (string.Compare (method, m, StringComparison.InvariantCultureIgnoreCase) == 0)
return;
if (!is_chunked && !cl_set) {
context.Connection.SendError (null, 411);
return;
}
if (is_chunked || content_length > 0) {
input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
}
if (Headers ["Expect"] == "100-continue") {
ResponseStream output = context.Connection.GetResponseStream ();
output.InternalWrite (_100continue, 0, _100continue.Length);
}
}
internal static string Unquote (String str) {
int start = str.IndexOf ('\"');
int end = str.LastIndexOf ('\"');
if (start >= 0 && end >=0)
str = str.Substring (start + 1, end - 1);
return str.Trim ();
}
internal void AddHeader (string header)
{
int colon = header.IndexOf (':');
if (colon == -1 || colon == 0) {
context.ErrorMessage = "Bad Request";
context.ErrorStatus = 400;
return;
}
string name = header.Substring (0, colon).Trim ();
string val = header.Substring (colon + 1).Trim ();
string lower = name.ToLower (CultureInfo.InvariantCulture);
headers.SetInternal (name, val);
switch (lower) {
case "accept-language":
user_languages = val.Split (','); // yes, only split with a ','
break;
case "accept":
accept_types = val.Split (','); // yes, only split with a ','
break;
case "content-length":
try {
//TODO: max. content_length?
content_length = Int64.Parse (val.Trim ());
if (content_length < 0)
context.ErrorMessage = "Invalid Content-Length.";
cl_set = true;
} catch {
context.ErrorMessage = "Invalid Content-Length.";
}
break;
case "referer":
try {
referrer = new Uri (val);
} catch {
referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
}
break;
case "cookie":
if (cookies == null)
cookies = new CookieCollection();
string[] cookieStrings = val.Split(new char[] {',', ';'});
Cookie current = null;
int version = 0;
foreach (string cookieString in cookieStrings) {
string str = cookieString.Trim ();
if (str.Length == 0)
continue;
if (str.StartsWith ("$Version")) {
version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
} else if (str.StartsWith ("$Path")) {
if (current != null)
current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
} else if (str.StartsWith ("$Domain")) {
if (current != null)
current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
} else if (str.StartsWith ("$Port")) {
if (current != null)
current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
} else {
if (current != null) {
cookies.Add (current);
}
current = new Cookie ();
int idx = str.IndexOf ("=");
if (idx > 0) {
current.Name = str.Substring (0, idx).Trim ();
current.Value = str.Substring (idx + 1).Trim ();
} else {
current.Name = str.Trim ();
current.Value = String.Empty;
}
current.Version = version;
}
}
if (current != null) {
cookies.Add (current);
}
break;
}
}
// returns true is the stream could be reused.
internal bool FlushInput ()
{
if (!HasEntityBody)
return true;
int length = 2048;
if (content_length > 0)
length = (int) Math.Min (content_length, (long) length);
byte [] bytes = new byte [length];
while (true) {
// TODO: test if MS has a timeout when doing this
try {
if (InputStream.Read (bytes, 0, length) <= 0)
return true;
} catch {
return false;
}
}
}
public string [] AcceptTypes {
get { return accept_types; }
}
[MonoTODO ("Always returns 0")]
public int ClientCertificateError {
get {
/*
if (no_get_certificate)
throw new InvalidOperationException (
"Call GetClientCertificate() before calling this method.");
return client_cert_error;
*/
return 0;
}
}
public Encoding ContentEncoding {
get {
if (content_encoding == null)
content_encoding = Encoding.Default;
return content_encoding;
}
}
public long ContentLength64 {
get { return content_length; }
}
public string ContentType {
get { return headers ["content-type"]; }
}
public CookieCollection Cookies {
get {
// TODO: check if the collection is read-only
if (cookies == null)
cookies = new CookieCollection ();
return cookies;
}
}
public bool HasEntityBody {
get { return (content_length > 0 || is_chunked); }
}
public NameValueCollection Headers {
get { return headers; }
}
public string HttpMethod {
get { return method; }
}
public Stream InputStream {
get { return input_stream; }
}
[MonoTODO ("Always returns false")]
public bool IsAuthenticated {
get { return false; }
}
public bool IsLocal {
get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
}
public bool IsSecureConnection {
get { return context.Connection.IsSecure; }
}
public bool KeepAlive {
get { return false; }
}
public IPEndPoint LocalEndPoint {
get { return context.Connection.LocalEndPoint; }
}
public Version ProtocolVersion {
get { return version; }
}
public NameValueCollection QueryString {
get { return query_string; }
}
public string RawUrl {
get { return raw_url; }
}
public IPEndPoint RemoteEndPoint {
get { return context.Connection.RemoteEndPoint; }
}
public Guid RequestTraceIdentifier {
get { return identifier; }
}
public Uri Url {
get { return url; }
}
public Uri UrlReferrer {
get { return referrer; }
}
public string UserAgent {
get { return headers ["user-agent"]; }
}
public string UserHostAddress {
get { return LocalEndPoint.ToString (); }
}
public string UserHostName {
get { return headers ["host"]; }
}
public string [] UserLanguages {
get { return user_languages; }
}
public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
{
return null;
}
#if SECURITY_DEP
public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
{
return null;
// set no_client_certificate once done.
}
public X509Certificate2 GetClientCertificate ()
{
// set no_client_certificate once done.
// InvalidOp if call in progress.
return null;
}
#endif
}
}
#endif
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