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yatemime.h
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yatemime.h
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/**
* yatemime.h
* This file is part of the YATE Project http://YATE.null.ro
*
* MIME types, body codecs and related functions
*
* Yet Another Telephony Engine - a fully featured software PBX and IVR
* Copyright (C) 2004-2014 Null Team
*
* This software is distributed under multiple licenses;
* see the COPYING file in the main directory for licensing
* information for this specific distribution.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef __YATEMIME_H
#define __YATEMIME_H
#ifndef __cplusplus
#error C++ is required
#endif
#include <yateclass.h>
/**
* Holds all Telephony Engine related classes.
*/
namespace TelEngine {
/**
* A MIME header line.
* The NamedString's value contain the first parameter after the header name
* @short MIME header line
*/
class YATE_API MimeHeaderLine : public NamedString
{
public:
/**
* Constructor.
* Builds a MIME header line from a string buffer.
* Splits the value into header parameters
* @param name The header name
* @param value The header value
* @param sep Optional parameter separator. If 0, the default ';' will be used
*/
MimeHeaderLine(const char* name, const String& value, char sep = 0);
/**
* Constructor.
* Builds this MIME header line from another one
* @param original Original header line to build from.
* @param newName Optional new header name. If 0, the original name will be used
*/
MimeHeaderLine(const MimeHeaderLine& original, const char* newName = 0);
/**
* Destructor.
*/
virtual ~MimeHeaderLine();
/**
* RTTI method, get a pointer to a derived class given the class name.
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Duplicate this MIME header line.
* @param newName Optional new header name. If 0, this header's name will be used
* @return Copy of this MIME header line
*/
virtual MimeHeaderLine* clone(const char* newName = 0) const;
/**
* Build a string line from this MIME header without adding a line separator
* @param line Destination string
* @param header True to add the header in front of line text
*/
virtual void buildLine(String& line, bool header = true) const;
/**
* Assignement operator. Set the header's value
* @param value The new headr value
*/
inline MimeHeaderLine& operator=(const char* value)
{ NamedString::operator=(value); return *this; }
/**
* Get the header's parameters
* @return This header's list of parameters
*/
inline const ObjList& params() const
{ return m_params; }
/**
* Get the character used as separator in header line
* @return This header's separator
*/
inline char separator() const
{ return m_separator; }
/**
* Replace the value of an existing parameter or add a new one
* @param name Parameter's name
* @param value Parameter's value
*/
void setParam(const char* name, const char* value = 0);
/**
* Remove a parameter from list
* @param name Parameter's name
*/
void delParam(const char* name);
/**
* Get a header parameter
* @param name Parameter's name
* @return Pointer to the desired parameter or 0 if not found
*/
const NamedString* getParam(const char* name) const;
/**
* Utility function, puts quotes around a string.
* @param str String to put quotes around.
* @param force True to force quoting even if was already quoted
*/
static void addQuotes(String& str, bool force = false);
/**
* Utility function, removes quotes around a string.
* @param str String to remove quotes.
* @param force True to force unquoting even if wasn't properly quoted
*/
static void delQuotes(String& str, bool force = false);
/**
* Utility function, puts quotes around a string.
* @param str String to put quotes around.
* @param force True to force quoting even if was already quoted
* @return The input string enclosed in quotes.
*/
static String quote(const String& str, bool force = false);
/**
* Utility function, removes quotes around a string.
* @param str String to remove quotes around.
* @param force True to force unquoting even if wasn't properly quoted
* @return The input string with enclosing quotes removed.
*/
static String unquote(const String& str, bool force = false);
/**
* Utility function to find a separator not in "quotes" or inside \<uri\>.
* @param str Input string used to find the separator.
* @param sep The separator to find.
* @param offs Starting offset in input string.
* @return The position of the separator in input string or -1 if not found.
*/
static int findSep(const char* str, char sep, int offs = 0);
/**
* Build a string from a list of MIME header lines.
* Add a CR/LF terminator after each line
* @param buf Destination string
* @param headers The list with the header lines
*/
static void buildHeaders(String& buf, const ObjList& headers);
protected:
ObjList m_params; // Header list of parameters
char m_separator; // Parameter separator
private:
void operator=(const MimeHeaderLine&); // no assignment
};
/**
* A MIME header line containing authentication data.
* @short MIME authentication line
*/
class YATE_API MimeAuthLine : public MimeHeaderLine
{
public:
/**
* Constructor.
* Builds a MIME authentication header line from a string buffer.
* Splits the value into header parameters
* @param name The header name
* @param value The header value
*/
MimeAuthLine(const char* name, const String& value);
/**
* Constructor.
* Builds this MIME authentication header line from another one
* @param original Original header line to build from.
* @param newName Optional new header name. If 0, the original name will be used
*/
MimeAuthLine(const MimeAuthLine& original, const char* newName = 0);
/**
* RTTI method, get a pointer to a derived class given the class name.
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Duplicate this MIME header line.
* @param newName Optional new header name. If 0, this header's name will be used
* @return Copy of this MIME header line
*/
virtual MimeHeaderLine* clone(const char* newName = 0) const;
/**
* Build a string line from this MIME header without adding a line separator
* @param line Destination string
* @param header True to add the header in front of line text
*/
virtual void buildLine(String& line, bool header = true) const;
private:
void operator=(const MimeAuthLine&); // no assignment
};
/**
* Abstract base class for holding Multipurpose Internet Mail Extensions data.
* Keeps a Content-Type header line with body type and parameters and
* any additional header lines the body may have.
* The body type contains lower case characters.
* @short Abstract MIME data holder
*/
class YATE_API MimeBody : public GenObject
{
YNOCOPY(MimeBody); // no automatic copies please
public:
/**
* Destructor
*/
virtual ~MimeBody();
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Retrieve the MIME type of this body
* @return Name of the MIME type/subtype
*/
inline const MimeHeaderLine& getType() const
{ return m_type; }
/**
* Get the first body that matches a requested type, descends into multiparts
* @param type Name of the MIME type to search for
* @return Pointer to requested body or NULL if not found
*/
MimeBody* getFirst(const String& type) const;
/**
* Retrieve the additional headers of this MIME body (other then Content-Type)
* @return The list of header lines of this MIME body
*/
inline const ObjList& headers() const
{ return m_headers; }
/**
* Append an additional header line to this body
* @param hdr The header line to append
*/
inline void appendHdr(MimeHeaderLine* hdr)
{ if (hdr) m_headers.append(hdr); }
/**
* Remove an additional header line from this body
* @param hdr The header line to remove
* @param delobj True to delete the header, false to remove from list without deleting it
*/
inline void removeHdr(MimeHeaderLine* hdr, bool delobj = true)
{ if (hdr) m_headers.remove(hdr,delobj); }
/**
* Find an additional header line by its name. The names are compared case insensitive
* @param name The name of the header to find
* @param start The starting point in the list. 0 to start from the beginning
* @return Pointer to MimeHeaderLine or 0 if not found
*/
MimeHeaderLine* findHdr(const String& name, const MimeHeaderLine* start = 0) const;
/**
* Build a string with this body's header lines
* @param buf Destination string
*/
inline void buildHeaders(String& buf) {
m_type.buildLine(buf);
buf << "\r\n";
MimeHeaderLine::buildHeaders(buf,m_headers);
}
/**
* Replace the value of an existing parameter or add a new one
* @param name Parameter's name
* @param value Parameter's value
* @param header Header whose parameter will be changed.
* Set to 0 to use the body's content type header
* @return False if the header doesn't exist
*/
bool setParam(const char* name, const char* value = 0, const char* header = 0);
/**
* Remove a header parameter
* @param name Parameter's name
* @param header Header whose parameter will be removed.
* Set to 0 to use the body's content type header
* @return False if the header doesn't exist
*/
bool delParam(const char* name, const char* header = 0);
/**
* Get a header parameter
* @param name Parameter's name
* @param header Header whose parameter will be retrieved.
* Set to 0 to use the body's content type header
* @return Pointer to the desired parameter or 0 if not found
*/
const NamedString* getParam(const char* name, const char* header = 0) const;
/**
* Retrieve the binary encoding of this MIME body. Build the body if empty.
* The body doesn't contain the Content-Type header or the additional headers
* @return Block of binary data
*/
const DataBlock& getBody() const;
/**
* Get the binary data of this MIME body without building it.
* @return Block of binary data
*/
inline const DataBlock& body() const
{ return m_body; }
/**
* Check if this body is a Session Description Protocol
* @return True if this body holds a SDP
*/
virtual bool isSDP() const
{ return false; }
/**
* Check if this body is multipart (can hold other MIME bodies)
* @return True if this body is multipart
*/
virtual bool isMultipart() const
{ return false; }
/**
* Duplicate this MIME body
* @return Copy of this MIME body
*/
virtual MimeBody* clone() const = 0;
/**
* Method to build a MIME body from a type and data buffer.
* Unknown body types are built into a binary body. Exactly 1 leading CRLF
* is removed from the beginning of the buffer if found before building it
* @param buf Pointer to buffer of data just after the body headers
* @param len Length of data in buffer
* @param type The header line declaring the body's content.
* Usually this is a Content-Type header line
* @return Newly allocated MIME body or NULL if the buffer is empty
*/
static MimeBody* build(const char* buf, int len, const MimeHeaderLine& type);
/**
* Utility method, returns an unfolded line and advances the pointer
* @param buf Reference to pointer to start of buffer data
* @param len Reference to variable holding buffer length
* @return Newly allocated String holding the line of text
*/
static String* getUnfoldedLine(const char*& buf, int& len);
protected:
/**
* Constructor to be used only by derived classes.
* Converts the MIME type string to lower case
* @param type The value of the Content-Type header line
*/
MimeBody(const String& type);
/**
* Constructor to be used only by derived classes.
* Builds this body from a header line.
* Converts the MIME type string to lower case
* @param type The content type header line
*/
MimeBody(const MimeHeaderLine& type);
/**
* Method that is called internally to build the binary encoded body
*/
virtual void buildBody() const = 0;
/**
* Block of binary data that @ref buildBody() must fill
*/
mutable DataBlock m_body;
/**
* Additional body headers (other then Content-Type)
*/
ObjList m_headers;
private:
MimeHeaderLine m_type; // Content type header line
};
/**
* An object holding the bodies of a multipart MIME
* @short MIME multipart container
*/
class YATE_API MimeMultipartBody : public MimeBody
{
public:
/**
* Constructor to build an empty multipart body
* @param subtype The multipart subtype
* @param boundary The string used as separator for enclosed bodies.
* A random one will be created if missing. The length will be truncated
* to 70 if this value is exceeded
*/
explicit MimeMultipartBody(const char* subtype = "mixed", const char* boundary = 0);
/**
* Constructor from block of data
* @param type The value of the Content-Type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeMultipartBody(const String& type, const char* buf, int len);
/**
* Constructor from block of data
* @param type The content type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeMultipartBody(const MimeHeaderLine& type, const char* buf, int len);
/**
* Destructor
*/
virtual ~MimeMultipartBody();
/**
* Get the list of bodies enclosed contained in this multipart
* @return The list of bodies enclosed contained in this multipart
*/
inline const ObjList& bodies() const
{ return m_bodies; }
/**
* Append a body to this multipart
* @param body The body to append
*/
inline void appendBody(MimeBody* body)
{ if (body) m_bodies.append(body); }
/**
* Remove a body from this multipart
* @param body The body to remove
* @param delobj True to delete the body, false to remove from list without deleting it
*/
inline void removeBody(MimeBody* body, bool delobj = true)
{ if (body) m_bodies.remove(body,delobj); }
/**
* Find a body. Enclosed multiparts are also searched for the requested body
* @param content The value of the body to find. Must be lower case
* @param start The starting point in the list. 0 to start from the beginning.
* Be aware that this parameter is used internally to search within enclosed
* multipart bodies and set to 0 when the starting point is found
* @return Pointer to MimeBody or 0 if not found
*/
MimeBody* findBody(const String& content, MimeBody** start = 0) const;
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Check if this body is multipart (can hold other MIME bodies)
* @return True if this body is multipart
*/
virtual bool isMultipart() const
{ return true; }
/**
* Duplicate this MIME body
* @return Copy of this MIME body
*/
virtual MimeBody* clone() const;
protected:
/**
* Copy constructor
*/
MimeMultipartBody(const MimeMultipartBody& original);
/**
* Method that is called internally to build the binary encoded body
*/
virtual void buildBody() const;
/**
* Parse a data buffer and append any valid body to this multipart
* Ignore prolog, epilog and invalid bodies
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
void parse(const char* buf, int len);
private:
// Parse input buffer for first body boundary or data end
// Advance buffer pass the boundary line and decrease the buffer length
// Set endBody to true if the last boundary was found
// Return the length of data before the found boundary
int findBoundary(const char*& buf, int& len,
const char* boundary, unsigned int bLen, bool& endBody);
// Build a boundary string to be used when parsing or building body
// Remove quotes if present. Trim blanks
// Insert CRLF and boundary marks ('--') before parameter
// @param boundary Destination string
// @return False if the parameter is missing or the boundary is empty
bool getBoundary(String& boundary) const;
ObjList m_bodies; // The list of bodies contained in this multipart
};
/**
* An object holding the lines of an application/sdp MIME type
* @short MIME for application/sdp
*/
class YATE_API MimeSdpBody : public MimeBody
{
public:
/**
* Default constructor, builds an empty application/sdp
* @param hashing Enable hashing the content lines
*/
MimeSdpBody(bool hashing = false);
/**
* Constructor from block of data
* @param type The value of the Content-Type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeSdpBody(const String& type, const char* buf, int len);
/**
* Constructor from block of data
* @param type The content type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeSdpBody(const MimeHeaderLine& type, const char* buf, int len);
/**
* Destructor
*/
virtual ~MimeSdpBody();
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Override that checks if this body is an Session Description Protocol
* @return True, since this body holds a SDP
*/
virtual bool isSDP() const
{ return true; }
/**
* Duplicate this MIME body
* @return Copy of this MIME body - a new MimeSdpBody
*/
virtual MimeBody* clone() const;
/**
* Retrieve the lines hold in data
* @return List of NamedStrings
*/
inline const ObjList& lines() const
{ return m_lines; }
/**
* Retrieve the hash of body lines
* @return Hash of body, zero if hashing not enabled
*/
inline unsigned int hash() const
{ return m_hash; }
/**
* Append a new name=value line of SDP data
* @param name Name of the line, should be one character
* @param value Text of the line
* @return Pointer to new added line
*/
NamedString* addLine(const char* name, const char* value = 0);
/**
* Retrieve the first line matching a name
* @param name Name of the line to search
* @return First instance of the searched name or NULL if none present
*/
const NamedString* getLine(const char* name) const;
/**
* Retrieve the next line of the same type as the current
* @param line Current line
* @return Next instance of same name or NULL if no more
*/
const NamedString* getNextLine(const NamedString* line) const;
protected:
/**
* Copy constructor
*/
MimeSdpBody(const MimeSdpBody& original);
/**
* Override that is called internally to build the binary encoded body
*/
virtual void buildBody() const;
private:
// Build the lines from a data buffer
void buildLines(const char* buf, int len);
ObjList m_lines;
ObjList* m_lineAppend;
unsigned int m_hash;
bool m_hashing;
};
/**
* An object holding a binary block of MIME data
* @short MIME for obscure binary data
*/
class YATE_API MimeBinaryBody : public MimeBody
{
public:
/**
* Constructor from block of data
* @param type The value of the Content-Type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeBinaryBody(const String& type, const char* buf, int len);
/**
* Constructor from block of data
* @param type The content type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeBinaryBody(const MimeHeaderLine& type, const char* buf, int len);
/**
* Destructor
*/
virtual ~MimeBinaryBody();
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Duplicate this MIME body
* @return Copy of this MIME body - a new MimeBinaryBody
*/
virtual MimeBody* clone() const;
protected:
/**
* Copy constructor
*/
MimeBinaryBody(const MimeBinaryBody& original);
/**
* Override that is called internally to build the binary encoded body
*/
virtual void buildBody() const;
};
/**
* An object holding MIME data as just one text string
* @short MIME for one text string
*/
class YATE_API MimeStringBody : public MimeBody
{
public:
/**
* Constructor from block of data
* @param type The value of the Content-Type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeStringBody(const String& type, const char* buf, int len = -1);
/**
* Constructor from block of data
* @param type The content type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeStringBody(const MimeHeaderLine& type, const char* buf, int len = -1);
/**
* Destructor
*/
virtual ~MimeStringBody();
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Duplicate this MIME body
* @return Copy of this MIME body - a new MimeStringBody
*/
virtual MimeBody* clone() const;
/**
* Retrieve the stored data
* @return String holding the data text
*/
inline const String& text() const
{ return m_text; }
protected:
/**
* Copy constructor
*/
MimeStringBody(const MimeStringBody& original);
/**
* Override that is called internally to build the binary encoded body
*/
virtual void buildBody() const;
private:
String m_text;
};
/**
* An object holding MIME data as separate text lines
* @short MIME for multiple text lines
*/
class YATE_API MimeLinesBody : public MimeBody
{
public:
/**
* Constructor from block of data
* @param type The value of the Content-Type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeLinesBody(const String& type, const char* buf, int len);
/**
* Constructor from block of data
* @param type The content type header line
* @param buf Pointer to buffer of data
* @param len Length of data in buffer
*/
MimeLinesBody(const MimeHeaderLine& type, const char* buf, int len);
/**
* Destructor
*/
virtual ~MimeLinesBody();
/**
* RTTI method, get a pointer to a derived class given the class name
* @param name Name of the class we are asking for
* @return Pointer to the requested class or NULL if this object doesn't implement it
*/
virtual void* getObject(const String& name) const;
/**
* Duplicate this MIME body
* @return Copy of this MIME body - a new MimeLinesBody
*/
virtual MimeBody* clone() const;
/**
* Retrieve the stored lines of text
* @return List of Strings
*/
inline const ObjList& lines() const
{ return m_lines; }
/**
* Append a line of text to the data
* @param line Text to append
*/
inline void addLine(const char* line)
{ m_lines.append(new String(line)); }
protected:
/**
* Copy constructor
*/
MimeLinesBody(const MimeLinesBody& original);
/**
* Override that is called internally to build the binary encoded body
*/
virtual void buildBody() const;
private:
ObjList m_lines;
};
}; // namespace TelEngine
#endif /* __YATEMIME_H */
/* vi: set ts=8 sw=4 sts=4 noet: */