74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
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// EnvelopeParser.h
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// Declares the cEnvelopeParser class representing a parser for RFC-822 envelope headers, used both in HTTP and in MIME
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#pragma once
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class cEnvelopeParser
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{
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public:
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class cCallbacks
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{
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public:
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// Force a virtual destructor in descendants:
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virtual ~cCallbacks() {}
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/** Called when a full header line is parsed */
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virtual void OnHeaderLine(const AString & a_Key, const AString & a_Value) = 0;
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} ;
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cEnvelopeParser(cCallbacks & a_Callbacks);
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/** Parses the incoming data.
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Returns the number of bytes consumed from the input. The bytes not consumed are not part of the envelope header.
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Returns AString::npos on error
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*/
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size_t Parse(const char * a_Data, size_t a_Size);
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/** Makes the parser forget everything parsed so far, so that it can be reused for parsing another datastream */
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void Reset(void);
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/** Returns true if more input is expected for the envelope header */
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bool IsInHeaders(void) const { return m_IsInHeaders; }
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/** Sets the IsInHeaders flag; used by cMultipartParser to simplify the parser initial conditions */
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void SetIsInHeaders(bool a_IsInHeaders) { m_IsInHeaders = a_IsInHeaders; }
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public:
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/** Callbacks to call for the various events */
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cCallbacks & m_Callbacks;
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/** Set to true while the parser is still parsing the envelope headers. Once set to true, the parser will not consume any more data. */
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bool m_IsInHeaders;
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/** Buffer for the incoming data until it is parsed */
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AString m_IncomingData;
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/** Holds the last parsed key; used for line-wrapped values */
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AString m_LastKey;
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/** Holds the last parsed value; used for line-wrapped values */
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AString m_LastValue;
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/** Notifies the callback of the key / value stored in m_LastKey / m_LastValue, then erases them */
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void NotifyLast(void);
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/** Parses one line of header data. Returns true if successful */
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bool ParseLine(const char * a_Data, size_t a_Size);
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} ;
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