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kheader.c
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kheader.c
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/*
* kheader.c, part of "knet" project.
*
* Created on: 23.08.2015, 17:12
* Author: Vsevolod Lutovinov <klopp@yandex.ru>
*/
#include "kheader.h"
#include "kaddr.h"
#include "mime.h"
#include "../stringlib/b64.h"
#define ENCODED_BLK_SIZE 45
static string hdr_Encodeb64( const char * prefix, const char * value )
{
string encoded = snew();
size_t size = strlen( value );
char * first = "";
if( !encoded ) return NULL;
while( size )
{
string b64;
size_t to_encode = size > ENCODED_BLK_SIZE ? ENCODED_BLK_SIZE : size;
b64 = base64_encode( value, to_encode );
if( !b64 )
{
sdel( b64 );
sdel( encoded );
return NULL;
}
if( !xscatc( encoded, first, prefix, sstr( b64 ), "?=", NULL ) )
{
sdel( b64 );
sdel( encoded );
return NULL;
}
sdel( b64 );
first = " ";
size -= to_encode;
value += to_encode;
if( size )
{
if( !scatc( encoded, "\r\n" ) )
{
sdel( b64 );
sdel( encoded );
return NULL;
}
}
}
return encoded;
}
static void del_Header( void * ptr )
{
if( ptr )
{
msg_Header header = (msg_Header)ptr;
Free( header->name );
ldestroy( header->values );
}
}
msg_Headers hdr_Create( void )
{
msg_Headers headers = Calloc( sizeof(struct _msg_Headers), 1 );
if( headers )
{
headers->mail = lcreate( del_Header );
headers->text = lcreate( del_Header );
}
return headers;
}
void hdr_Destroy( msg_Headers headers )
{
ldestroy( headers->mail );
ldestroy( headers->text );
headers->text = headers->mail = NULL;
Free( headers );
}
static msg_Header hdr_FindHeader( List headers, const char * key )
{
msg_Header header = lfirst( headers );
while( header )
{
if( !strcmp( header->name, key ) )
{
break;
}
header = lnext( headers );
}
return header;
}
int hdr_AddTextHeader( msg_Headers headers, const char * key,
const char * value )
{
msg_Header header = hdr_FindHeader( headers->text, key );
if( !header )
{
header = Calloc( sizeof(struct _msg_Header), 1 );
if( !header ) return 0;
header->name = Strdup( key );
if( !header->name )
{
Free( header );
return 0;
}
header->values = slcreate();
if( !header->values )
{
del_Header( header );
return 0;
}
if( !sladd( header->values, value ) )
{
del_Header( header );
return 0;
}
}
return ladd( headers->text, header ) != NULL;
}
int hdr_AddMailHeader( msg_Headers headers, const char * key,
const char * mail )
{
msg_Header header = hdr_FindHeader( headers->text, key );
if( !header )
{
Pair addr = addr_Create( mail );
if( !addr ) return 0;
header = Calloc( sizeof(struct _msg_Header), 1 );
if( !header ) return 0;
header->name = Strdup( key );
if( !header->name )
{
pair_Delete( addr );
Free( header );
return 0;
}
header->values = plcreate();
if( !header->values )
{
pair_Delete( addr );
del_Header( header );
return 0;
}
if( !pladd( header->values, A_NAME( addr ), A_EMAIL( addr ) ) )
{
pair_Delete( addr );
del_Header( header );
return 0;
}
pair_Delete( addr );
}
return ladd( headers->mail, header ) != NULL;
}
int hdr_SetMailHeader( msg_Headers headers, const char * key,
const char * mail )
{
msg_Header header = hdr_FindHeader( headers->mail, key );
if( header ) lclear( header->values );
return hdr_AddMailHeader( headers, key, mail );
}
int hdr_SetTextHeader( msg_Headers headers, const char * key, const char * val )
{
msg_Header header = hdr_FindHeader( headers->text, key );
if( header ) lclear( header->values );
return hdr_AddTextHeader( headers, key, val );
}
void hdr_ClearHeader( msg_Headers headers, const char * key )
{
msg_Header header = hdr_GetHeader( headers, key );
if( header ) lclear( header->values );
}
msg_Header hdr_GetHeader( msg_Headers headers, const char * key )
{
msg_Header header = hdr_FindHeader( headers->text, key );
if( !header ) header = hdr_FindHeader( headers->mail, key );
return header;
}
static int hdr_MakeTextHeader( msg_Header header, const char * cprefix,
string out )
{
char * value;
string rc = snew();
if( !rc ) return 0;
value = slfirst( header->values );
while( value )
{
if( isUsAscii( value ) )
{
if( !xscatc( rc, header->name, ": ", value, "\r\n", NULL ) )
{
sdel( rc );
return 0;
}
}
else
{
string b64 = hdr_Encodeb64( cprefix, value );
if( !b64 ) return 0;
if( !xscatc( rc, header->name, ": ", sstr( b64 ), "\r\n", NULL ) )
{
sdel( b64 );
sdel( rc );
return 0;
}
sdel( b64 );
}
value = slnext( header->values );
}
if( !scat( out, rc ) )
{
sdel( rc );
return 0;
}
sdel( rc );
return 1;
}
static int hdr_MakeTextHeaders( msg_Headers headers, const char * charset,
string out )
{
msg_Header header;
char cprefix[32];
string rc = snew();
if( !rc ) return 0;
if( !isUsAsciiCs( charset ) ) snprintf( cprefix, sizeof(cprefix) - 1,
"=?%s?B?", charset );
else *cprefix = 0;
header = lfirst( headers->text );
while( header )
{
if( !hdr_MakeTextHeader( header, cprefix, rc ) )
{
sdel( rc );
return 0;
}
header = lnext( headers->text );
}
if( !scat( out, rc ) )
{
sdel( rc );
return 0;
}
sdel( rc );
return 1;
}
static string hdr_MakeEmail( const char * cprefix, Pair a )
{
string buf = snew();
if( !buf ) return NULL;
if( A_NAME( a ) )
{
if( isUsAscii( A_NAME( a ) ) )
{
if( !sprint( buf, "%s <%s>", A_NAME( a ), A_EMAIL( a ) ) )
{
sdel( buf );
return NULL;
}
}
else
{
string b64 = hdr_Encodeb64( cprefix, A_NAME( a ) );
if( !b64 )
{
sdel( buf );
return NULL;
}
if( !sprint( buf, "%s <%s>", sstr( b64 ), A_EMAIL( a ) ) )
{
sdel( buf );
sdel( b64 );
return NULL;
}
sdel( b64 );
}
}
else
{
if( !scatc( buf, A_EMAIL( a ) ) )
{
sdel( buf );
return 0;
}
}
return buf;
}
static int hdr_MakeMailHeader( msg_Header header, const char * cprefix,
string out )
{
Pair email;
string rc;
rc = snew();
if( !rc ) return 0;
email = plfirst( header->values );
while( email )
{
string value = hdr_MakeEmail( cprefix, email );
if( !value )
{
sdel( rc );
return 0;
}
if( !scatc( rc, sstr( value ) ) )
{
sdel( rc );
return 0;
}
email = plnext( header->values );
if( !scatc( rc, email ? "," : "\r\n" ) )
{
sdel( rc );
return 0;
}
}
if( !scat( out, rc ) )
{
sdel( rc );
return 0;
}
sdel( rc );
return 1;
}
static int hdr_MakeMailHeaders( msg_Headers headers, const char * charset,
string out )
{
msg_Header header;
char cprefix[32];
string rc = snew();
if( !rc ) return 0;
if( !isUsAsciiCs( charset ) ) snprintf( cprefix, sizeof(cprefix) - 1,
"=?%s?B?", charset );
else *cprefix = 0;
header = lfirst( headers->mail );
while( header )
{
if( !xscatc( rc, header->name, ": ", NULL ) )
{
sdel( rc );
return 0;
}
if( !hdr_MakeMailHeader( header, cprefix, rc ) )
{
sdel( rc );
return 0;
}
header = lnext( headers->mail );
}
if( !scat( out, rc ) )
{
sdel( rc );
return 0;
}
sdel( rc );
return 1;
}
string hdr_AsString( msg_Headers headers, const char * charset )
{
string out = snew();
if( !out || !hdr_MakeMailHeaders( headers, charset, out )
|| !hdr_MakeTextHeaders( headers, charset, out ) )
{
sdel( out );
return NULL;
}
return out;
}