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// HTTPMessage.h
// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes
#pragma once
class cHTTPMessage
{
public:
enum eStatus
{
HTTP_OK = 200,
HTTP_BAD_REQUEST = 400,
};
enum eKind
{
mkRequest,
mkResponse,
};
cHTTPMessage(eKind a_Kind);
// Force a virtual destructor in all descendants
virtual ~cHTTPMessage() {}
/** Adds a header into the internal map of headers. Recognizes special headers: Content-Type and Content-Length */
virtual void AddHeader(const AString & a_Key, const AString & a_Value);
void SetContentType(const AString & a_ContentType) { m_ContentType = a_ContentType; }
void SetContentLength(size_t a_ContentLength) { m_ContentLength = a_ContentLength; }
const AString & GetContentType(void) const { return m_ContentType; }
size_t GetContentLength(void) const { return m_ContentLength; }
protected:
using cNameValueMap = std::map<AString, AString>;
eKind m_Kind;
/** Map of headers, with their keys lowercased. */
AStringMap m_Headers;
/** Type of the content; parsed by AddHeader(), set directly by SetContentLength() */
AString m_ContentType;
/** Length of the content that is to be received.
AString::npos when the object is created.
Parsed by AddHeader() or set directly by SetContentLength() */
size_t m_ContentLength;
};
/** Stores outgoing response headers and serializes them to an HTTP data stream. */
class cHTTPOutgoingResponse : public cHTTPMessage
{
using Super = cHTTPMessage;
public:
cHTTPOutgoingResponse(void);
/** Appends the response to the specified datastream - response line and headers.
The body will be sent later directly through cConnection::Send() */
void AppendToData(AString & a_DataStream) const;
};
/** Provides storage for an incoming HTTP request. */
class cHTTPIncomingRequest : public cHTTPMessage
{
using Super = cHTTPMessage;
public:
/** Base class for anything that can be used as the UserData for the request. */
class cUserData
{
public:
// Force a virtual destructor in descendants:
virtual ~cUserData() {}
};
using cUserDataPtr = std::shared_ptr<cUserData>;
/** Creates a new instance of the class, containing the method and URL provided by the client. */
cHTTPIncomingRequest(const AString & a_Method, const AString & a_URL);
/** Returns the method used in the request */
const AString & GetMethod(void) const { return m_Method; }
/** Returns the URL used in the request */
const AString & GetURL(void) const { return m_URL; }
/** Returns the path part of the URL. */
AString GetURLPath(void) const;
/** Returns true if the request has had the Auth header present. */
bool HasAuth(void) const { return m_HasAuth; }
/** Returns the username that the request presented. Only valid if HasAuth() is true */
const AString & GetAuthUsername(void) const { return m_AuthUsername; }
/** Returns the password that the request presented. Only valid if HasAuth() is true */
const AString & GetAuthPassword(void) const { return m_AuthPassword; }
bool DoesAllowKeepAlive(void) const { return m_AllowKeepAlive; }
/** Attaches any kind of data to this request, to be later retrieved by GetUserData(). */
void SetUserData(cUserDataPtr a_UserData) { m_UserData = std::move(a_UserData); }
/** Returns the data attached to this request by the class client. */
cUserDataPtr GetUserData(void) { return m_UserData; }
/** Adds the specified header into the internal list of headers.
Overrides the parent to add recognizing additional headers: auth and keepalive. */
virtual void AddHeader(const AString & a_Key, const AString & a_Value) override;
protected:
/** Method of the request (GET / PUT / POST / ...) */
AString m_Method;
/** Full URL of the request */
AString m_URL;
/** Set to true if the request contains auth data that was understood by the parser */
bool m_HasAuth;
/** The username used for auth */
AString m_AuthUsername;
/** The password used for auth */
AString m_AuthPassword;
/** Set to true if the request indicated that it supports keepalives.
If false, the server will close the connection once the request is finished */
bool m_AllowKeepAlive;
/** Any data attached to the request by the class client. */
cUserDataPtr m_UserData;
};
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