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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
{
HTTP_OK = 200,
HTTP_BAD_REQUEST = 400,
} ;
enum eKind
{
mkRequest,
mkResponse,
} ;
cHTTPMessage(eKind a_Kind);
/// Adds a header into the internal map of headers. Recognizes special headers: Content-Type and Content-Length
void AddHeader(const AString & a_Key, const AString & a_Value);
void SetContentType (const AString & a_ContentType) { m_ContentType = a_ContentType; }
void SetContentLength(int a_ContentLength) { m_ContentLength = a_ContentLength; }
const AString & GetContentType (void) const { return m_ContentType; }
int GetContentLength(void) const { return m_ContentLength; }
protected:
typedef std::map<AString, AString> cNameValueMap;
eKind m_Kind;
cNameValueMap 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. -1 when the object is created, parsed by AddHeader() or set directly by SetContentLength()
int m_ContentLength;
} ;
class cHTTPRequest :
public cHTTPMessage
{
typedef cHTTPMessage super;
public:
cHTTPRequest(void);
/// Parses the headers information from the received data in the specified string of incoming data. Returns true if successful.
bool ParseHeaders(const char * a_IncomingData, size_t a_idxEnd);
/// Returns true if the request did contain a Content-Length header
bool HasReceivedContentLength(void) const { return (m_ContentLength >= 0); }
protected:
/// Method of the request (GET / PUT / POST / ...)
AString m_Method;
/// Full URL of the request
AString m_URL;
/// Number of bytes that remain to read for the complete body of the message to be received
int m_BodyRemaining;
/** Parses the RequestLine out of a_Data, up to index a_IdxEnd
Returns the index to the next line, or npos if invalid request
*/
size_t ParseRequestLine(const char * a_Data, size_t a_IdxEnd);
/** Parses one header field out of a_Data, up to offset a_IdxEnd.
Returns the index to the next line (relative to a_Data), or npos if invalid request.
a_Key is set to the key that was parsed (used for multi-line headers)
*/
size_t ParseHeaderField(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
/** Parses one header field that is known to be a continuation of previous header.
Returns the index to the next line, or npos if invalid request.
*/
size_t ParseHeaderFieldContinuation(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
} ;
class cHTTPResponse :
public cHTTPMessage
{
typedef cHTTPMessage super;
public:
cHTTPResponse(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;
} ;
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