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// HTTPConnection.h
// Declares the cHTTPConnection class representing a single persistent connection in the HTTP server.
#pragma once
#include "../OSSupport/Network.h"
// fwd:
class cHTTPServer;
class cHTTPResponse;
class cHTTPRequest;
class cHTTPConnection :
public cTCPLink::cCallbacks
{
public:
enum eState
{
wcsRecvHeaders, ///< Receiving request headers (m_CurrentRequest is created if nullptr)
wcsRecvBody, ///< Receiving request body (m_CurrentRequest is valid)
wcsRecvIdle, ///< Has received the entire body, waiting to send the response (m_CurrentRequest == nullptr)
wcsSendingResp, ///< Sending response body (m_CurrentRequest == nullptr)
wcsInvalid, ///< The request was malformed, the connection is closing
} ;
cHTTPConnection(cHTTPServer & a_HTTPServer);
virtual ~cHTTPConnection();
/** Sends HTTP status code together with a_Reason (used for HTTP errors).
Sends the a_Reason as the body as well, so that browsers display it. */
void SendStatusAndReason(int a_StatusCode, const AString & a_Reason);
/** Sends the "401 unauthorized" reply together with instructions on authorizing, using the specified realm */
void SendNeedAuth(const AString & a_Realm);
/** Sends the headers contained in a_Response */
void Send(const cHTTPResponse & a_Response);
/** Sends the data as the response (may be called multiple times) */
void Send(const void * a_Data, size_t a_Size);
/** Sends the data as the response (may be called multiple times) */
void Send(const AString & a_Data) { Send(a_Data.data(), a_Data.size()); }
/** Indicates that the current response is finished, gets ready for receiving another request (HTTP 1.1 keepalive) */
void FinishResponse(void);
/** Resets the internal connection state for a new request.
Depending on the state, this will send an "InternalServerError" status or a "ResponseEnd" */
void AwaitNextRequest(void);
/** Terminates the connection; finishes any request being currently processed */
void Terminate(void);
protected:
typedef std::map<AString, AString> cNameValueMap;
/** The parent webserver that is to be notified of events on this connection */
cHTTPServer & m_HTTPServer;
/** All the incoming data until the entire request header is parsed */
AString m_IncomingHeaderData;
/** Status in which the request currently is */
eState m_State;
/** The request being currently received
Valid only between having parsed the headers and finishing receiving the body. */
cHTTPRequest * m_CurrentRequest;
/** Number of bytes that remain to read for the complete body of the message to be received.
Valid only in wcsRecvBody */
size_t m_CurrentRequestBodyRemaining;
/** The network link attached to this connection. */
cTCPLinkPtr m_Link;
// cTCPLink::cCallbacks overrides:
/** The link instance has been created, remember it. */
virtual void OnLinkCreated(cTCPLinkPtr a_Link) override;
/** Data is received from the client. */
virtual void OnReceivedData(const char * a_Data, size_t a_Size) override;
/** The socket has been closed for any reason. */
virtual void OnRemoteClosed(void) override;
/** An error has occurred on the socket. */
virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override;
// Overridable:
/** Called to send raw data over the link. Descendants may provide data transformations (SSL etc.) */
virtual void SendData(const void * a_Data, size_t a_Size);
/** Sends the raw data over the link.
Descendants may provide data transformations (SSL etc.) via the overridable SendData() function. */
void SendData(const AString & a_Data)
{
SendData(a_Data.data(), a_Data.size());
}
} ;
typedef std::vector<cHTTPConnection *> cHTTPConnections;
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