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using
System
;
using
System
.
Net
;
using
System
.
Threading
;
using
System
.
Threading
.
Tasks
;
namespace
NetCoreServer
{
/// <summary>
/// HTTP client is used to communicate with HTTP Web server. It allows to send GET, POST, PUT, DELETE requests and receive HTTP result.
/// </summary>
/// <remarks>Thread-safe.</remarks>
public
class
HttpClient
:
TcpClient
{
/// <summary>
/// Initialize HTTP client with a given IP address and port number
/// </summary>
/// <param name="address">IP address</param>
/// <param name="port">Port number</param>
public
HttpClient
(
IPAddress
address
,
int
port
)
:
base
(
address
,
port
)
{
Request
=
new
HttpRequest
(
)
;
Response
=
new
HttpResponse
(
)
;
}
/// <summary>
/// Initialize HTTP client with a given IP address and port number
/// </summary>
/// <param name="address">IP address</param>
/// <param name="port">Port number</param>
public
HttpClient
(
string
address
,
int
port
)
:
base
(
address
,
port
)
{
Request
=
new
HttpRequest
(
)
;
Response
=
new
HttpResponse
(
)
;
}
/// <summary>
/// Initialize HTTP client with a given DNS endpoint
/// </summary>
/// <param name="endpoint">DNS endpoint</param>
public
HttpClient
(
DnsEndPoint
endpoint
)
:
base
(
endpoint
)
{
Request
=
new
HttpRequest
(
)
;
Response
=
new
HttpResponse
(
)
;
}
/// <summary>
/// Initialize HTTP client with a given IP endpoint
/// </summary>
/// <param name="endpoint">IP endpoint</param>
public
HttpClient
(
IPEndPoint
endpoint
)
:
base
(
endpoint
)
{
Request
=
new
HttpRequest
(
)
;
Response
=
new
HttpResponse
(
)
;
}
/// <summary>
/// Get the HTTP request
/// </summary>
public
HttpRequest
Request
{
get
;
protected
set
;
}
/// <summary>
/// Get the HTTP response
/// </summary>
protected
HttpResponse
Response
{
get
;
set
;
}
#region Send request / Send request body
/// <summary>
/// Send the current HTTP request (synchronous)
/// </summary>
/// <returns>Size of sent data</returns>
public
long
SendRequest
(
)
=>
SendRequest
(
Request
)
;
/// <summary>
/// Send the HTTP request (synchronous)
/// </summary>
/// <param name="request">HTTP request</param>
/// <returns>Size of sent data</returns>
public
long
SendRequest
(
HttpRequest
request
)
=>
Send
(
request
.
Cache
.
Data
,
request
.
Cache
.
Offset
,
request
.
Cache
.
Size
)
;
/// <summary>
/// Send the HTTP request body (synchronous)
/// </summary>
/// <param name="body">HTTP request body</param>
/// <returns>Size of sent data</returns>
public
long
SendRequestBody
(
string
body
)
=>
Send
(
body
)
;
/// <summary>
/// Send the HTTP request body (synchronous)
/// </summary>
/// <param name="body">HTTP request body as a span of characters</param>
/// <returns>Size of sent data</returns>
public
long
SendRequestBody
(
ReadOnlySpan
<
char
>
body
)
=>
Send
(
body
)
;
/// <summary>
/// Send the HTTP request body (synchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer</param>
/// <returns>Size of sent data</returns>
public
long
SendRequestBody
(
byte
[
]
buffer
)
=>
Send
(
buffer
)
;
/// <summary>
/// Send the HTTP request body (synchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer</param>
/// <param name="offset">HTTP request body buffer offset</param>
/// <param name="size">HTTP request body size</param>
/// <returns>Size of sent data</returns>
public
long
SendRequestBody
(
byte
[
]
buffer
,
long
offset
,
long
size
)
=>
Send
(
buffer
,
offset
,
size
)
;
/// <summary>
/// Send the HTTP request body (synchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer as a span of bytes</param>
/// <returns>Size of sent data</returns>
public
long
SendRequestBody
(
ReadOnlySpan
<
byte
>
buffer
)
=>
Send
(
buffer
)
;
/// <summary>
/// Send the current HTTP request (asynchronous)
/// </summary>
/// <returns>'true' if the current HTTP request was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestAsync
(
)
=>
SendRequestAsync
(
Request
)
;
/// <summary>
/// Send the HTTP request (asynchronous)
/// </summary>
/// <param name="request">HTTP request</param>
/// <returns>'true' if the current HTTP request was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestAsync
(
HttpRequest
request
)
=>
SendAsync
(
request
.
Cache
.
Data
,
request
.
Cache
.
Offset
,
request
.
Cache
.
Size
)
;
/// <summary>
/// Send the HTTP request body (asynchronous)
/// </summary>
/// <param name="body">HTTP request body</param>
/// <returns>'true' if the HTTP request body was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestBodyAsync
(
string
body
)
=>
SendAsync
(
body
)
;
/// <summary>
/// Send the HTTP request body (asynchronous)
/// </summary>
/// <param name="body">HTTP request body as a span of characters</param>
/// <returns>'true' if the HTTP request body was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestBodyAsync
(
ReadOnlySpan
<
char
>
body
)
=>
SendAsync
(
body
)
;
/// <summary>
/// Send the HTTP request body (asynchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer</param>
/// <returns>'true' if the HTTP request body was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestBodyAsync
(
byte
[
]
buffer
)
=>
SendAsync
(
buffer
)
;
/// <summary>
/// Send the HTTP request body (asynchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer</param>
/// <param name="offset">HTTP request body buffer offset</param>
/// <param name="size">HTTP request body size</param>
/// <returns>'true' if the HTTP request body was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestBodyAsync
(
byte
[
]
buffer
,
long
offset
,
long
size
)
=>
SendAsync
(
buffer
,
offset
,
size
)
;
/// <summary>
/// Send the HTTP request body (asynchronous)
/// </summary>
/// <param name="buffer">HTTP request body buffer as a span of bytes</param>
/// <returns>'true' if the HTTP request body was successfully sent, 'false' if the session is not connected</returns>
public
bool
SendRequestBodyAsync
(
ReadOnlySpan
<
byte
>
buffer
)
=>
SendAsync
(
buffer
)
;
#endregion
#region Session handlers
protected
override
void
OnReceived
(
byte
[
]
buffer
,
long
offset
,
long
size
)
{
// Receive HTTP response header
if
(
Response
.
IsPendingHeader
(
)
)
{
if
(
Response
.
ReceiveHeader
(
buffer
,
(
int
)
offset
,
(
int
)
size
)
)
OnReceivedResponseHeader
(
Response
)
;
size
=
0
;
}
// Check for HTTP response error
if
(
Response
.
IsErrorSet
)
{
OnReceivedResponseError
(
Response
,
"Invalid HTTP response!"
)
;
Response
.
Clear
(
)
;
Disconnect
(
)
;
return
;
}
// Receive HTTP response body
if
(
Response
.
ReceiveBody
(
buffer
,
(
int
)
offset
,
(
int
)
size
)
)
{
OnReceivedResponse
(
Response
)
;
Response
.
Clear
(
)
;
return
;
}
// Check for HTTP response error
if
(
Response
.
IsErrorSet
)
{
OnReceivedResponseError
(
Response
,
"Invalid HTTP response!"
)
;
Response
.
Clear
(
)
;
Disconnect
(
)
;
return
;
}
}
protected
override
void
OnDisconnected
(
)
{
// Receive HTTP response body
if
(
Response
.
IsPendingBody
(
)
)
{
OnReceivedResponse
(
Response
)
;
Response
.
Clear
(
)
;
return
;
}
}
/// <summary>
/// Handle HTTP response header received notification
/// </summary>
/// <remarks>Notification is called when HTTP response header was received from the server.</remarks>
/// <param name="response">HTTP request</param>
protected
virtual
void
OnReceivedResponseHeader
(
HttpResponse
response
)
{
}
/// <summary>
/// Handle HTTP response received notification
/// </summary>
/// <remarks>Notification is called when HTTP response was received from the server.</remarks>
/// <param name="response">HTTP response</param>
protected
virtual
void
OnReceivedResponse
(
HttpResponse
response
)
{
}
/// <summary>
/// Handle HTTP response error notification
/// </summary>
/// <remarks>Notification is called when HTTP response error was received from the server.</remarks>
/// <param name="response">HTTP response</param>
/// <param name="error">HTTP response error</param>
protected
virtual
void
OnReceivedResponseError
(
HttpResponse
response
,
string
error
)
{
}
#endregion
}
/// <summary>
/// HTTP extended client make requests to HTTP Web server with returning Task as a synchronization primitive.
/// </summary>
/// <remarks>Thread-safe.</remarks>
public
class
HttpClientEx
:
HttpClient
{
/// <summary>
/// Initialize HTTP client with a given IP address and port number
/// </summary>
/// <param name="address">IP address</param>
/// <param name="port">Port number</param>
public
HttpClientEx
(
IPAddress
address
,
int
port
)
:
base
(
address
,
port
)
{
}
/// <summary>
/// Initialize HTTP client with a given IP address and port number
/// </summary>
/// <param name="address">IP address</param>
/// <param name="port">Port number</param>
public
HttpClientEx
(
string
address
,
int
port
)
:
base
(
address
,
port
)
{
}
/// <summary>
/// Initialize HTTP client with a given DNS endpoint
/// </summary>
/// <param name="endpoint">DNS endpoint</param>
public
HttpClientEx
(
DnsEndPoint
endpoint
)
:
base
(
endpoint
)
{
}
/// <summary>
/// Initialize HTTP client with a given IP endpoint
/// </summary>
/// <param name="endpoint">IP endpoint</param>
public
HttpClientEx
(
IPEndPoint
endpoint
)
:
base
(
endpoint
)
{
}
#region Send request
/// <summary>
/// Send current HTTP request
/// </summary>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendRequest
(
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
,
timeout
)
;
/// <summary>
/// Send HTTP request
/// </summary>
/// <param name="request">HTTP request</param>
/// <param name="timeout">HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendRequest
(
HttpRequest
request
,
TimeSpan
?
timeout
=
null
)
{
timeout
??=
TimeSpan
.
FromMinutes
(
1
)
;
_tcs
=
new
TaskCompletionSource
<
HttpResponse
>
(
)
;
Request
=
request
;
// Check if the HTTP request is valid
if
(
Request
.
IsEmpty
||
Request
.
IsErrorSet
)
{
SetPromiseError
(
"Invalid HTTP request!"
)
;
return
_tcs
.
Task
;
}
if
(
!
IsConnected
)
{
// Connect to the Web server
if
(
!
ConnectAsync
(
)
)
{
SetPromiseError
(
"Connection failed!"
)
;
return
_tcs
.
Task
;
}
}
else
{
// Send prepared HTTP request
if
(
!
SendRequestAsync
(
)
)
{
SetPromiseError
(
"Failed to send HTTP request!"
)
;
return
_tcs
.
Task
;
}
}
void
TimeoutHandler
(
object
state
)
{
// Disconnect on timeout
OnReceivedResponseError
(
Response
,
"Timeout!"
)
;
Response
.
Clear
(
)
;
DisconnectAsync
(
)
;
}
// Create a new timeout timer
if
(
_timer
==
null
)
_timer
=
new
Timer
(
TimeoutHandler
,
null
,
Timeout
.
Infinite
,
Timeout
.
Infinite
)
;
// Start the timeout timer
_timer
.
Change
(
(
int
)
timeout
.
Value
.
TotalMilliseconds
,
Timeout
.
Infinite
)
;
return
_tcs
.
Task
;
}
/// <summary>
/// Send HEAD request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendHeadRequest
(
string
url
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakeHeadRequest
(
url
)
,
timeout
)
;
/// <summary>
/// Send GET request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendGetRequest
(
string
url
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakeGetRequest
(
url
)
,
timeout
)
;
/// <summary>
/// Send POST request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="content">Content</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendPostRequest
(
string
url
,
string
content
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakePostRequest
(
url
,
content
)
,
timeout
)
;
/// <summary>
/// Send PUT request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="content">Content</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendPutRequest
(
string
url
,
string
content
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakePutRequest
(
url
,
content
)
,
timeout
)
;
/// <summary>
/// Send DELETE request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendDeleteRequest
(
string
url
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakeDeleteRequest
(
url
)
,
timeout
)
;
/// <summary>
/// Send OPTIONS request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendOptionsRequest
(
string
url
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakeOptionsRequest
(
url
)
,
timeout
)
;
/// <summary>
/// Send TRACE request
/// </summary>
/// <param name="url">URL to request</param>
/// <param name="timeout">Current HTTP request timeout (default is 1 minute)</param>
/// <returns>HTTP request Task</returns>
public
Task
<
HttpResponse
>
SendTraceRequest
(
string
url
,
TimeSpan
?
timeout
=
null
)
=>
SendRequest
(
Request
.
MakeTraceRequest
(
url
)
,
timeout
)
;
#endregion
#region Session handlers
protected
override
void
OnConnected
(
)
{
// Send prepared HTTP request on connect
if
(
!
Request
.
IsEmpty
&&
!
Request
.
IsErrorSet
)
if
(
!
SendRequestAsync
(
)
)
SetPromiseError
(
"Failed to send HTTP request!"
)
;
}
protected
override
void
OnDisconnected
(
)
{
// Cancel timeout check timer
_timer
?
.
Change
(
Timeout
.
Infinite
,
Timeout
.
Infinite
)
;
base
.
OnDisconnected
(
)
;
}
protected
override
void
OnReceivedResponse
(
HttpResponse
response
)
{
// Cancel timeout check timer
_timer
?
.
Change
(
Timeout
.
Infinite
,
Timeout
.
Infinite
)
;
SetPromiseValue
(
response
)
;
}
protected
override
void
OnReceivedResponseError
(
HttpResponse
response
,
string
error
)
{
// Cancel timeout check timer
_timer
?
.
Change
(
Timeout
.
Infinite
,
Timeout
.
Infinite
)
;
SetPromiseError
(
error
)
;
}
#endregion
private
TaskCompletionSource
<
HttpResponse
>
_tcs
=
new
TaskCompletionSource
<
HttpResponse
>
(
)
;
private
Timer
_timer
;
private
void
SetPromiseValue
(
HttpResponse
response
)
{
Response
=
new
HttpResponse
(
)
;
_tcs
.
SetResult
(
response
)
;
Request
.
Clear
(
)
;
}
private
void
SetPromiseError
(
string
error
)
{
_tcs
.
SetException
(
new
Exception
(
error
)
)
;
Request
.
Clear
(
)
;
}
#region IDisposable implementation
// Disposed flag.
private
bool
_disposed
;
protected
override
void
Dispose
(
bool
disposingManagedResources
)
{
if
(
!
_disposed
)
{
if
(
disposingManagedResources
)
{
// Dispose managed resources here...
_timer
?
.
Dispose
(
)
;
}
// Dispose unmanaged resources here...
// Set large fields to null here...
// Mark as disposed.
_disposed
=
true
;
}
// Call Dispose in the base class.
base
.
Dispose
(
disposingManagedResources
)
;
}
// The derived class does not have a Finalize method
// or a Dispose method without parameters because it inherits
// them from the base class.
#endregion
}
}
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