/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
/* camelMimePart.c : Abstract class for a mime_part */
/*
* Authors: Bertrand Guiheneuf <bertrand@helixcode.com>
* Michael Zucchi <notzed@helixcode.com>
*
* Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <config.h>
#include <string.h>
#include "camel-mime-part.h"
#include <stdio.h>
#include "string-utils.h"
#include "hash-table-utils.h"
#include "camel-mime-part-utils.h"
#include <ctype.h>
#include "camel-mime-parser.h"
#include "camel-stream-mem.h"
#include "camel-stream-filter.h"
#include "camel-mime-filter-basic.h"
#include "camel-mime-filter-crlf.h"
#include "camel-mime-filter-charset.h"
#include "camel-exception.h"
#define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))*/
typedef enum {
HEADER_UNKNOWN,
HEADER_DESCRIPTION,
HEADER_DISPOSITION,
HEADER_CONTENT_ID,
HEADER_ENCODING,
HEADER_CONTENT_MD5,
HEADER_CONTENT_LANGUAGES,
HEADER_CONTENT_TYPE
} CamelHeaderType;
static GHashTable *header_name_table;
static CamelMediumClass *parent_class=NULL;
/* Returns the class for a CamelMimePart */
#define CMP_CLASS(so) CAMEL_MIME_PART_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CDW_CLASS(so) CAMEL_DATA_WRAPPER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CMD_CLASS(so) CAMEL_MEDIUM_CLASS (CAMEL_OBJECT_GET_CLASS(so))
/* from CamelDataWrapper */
static int write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
static int construct_from_stream (CamelDataWrapper *dw, CamelStream *s);
/* from CamelMedia */
static void add_header (CamelMedium *medium, const char *header_name, const void *header_value);
static void set_header (CamelMedium *medium, const char *header_name, const void *header_value);
static void remove_header (CamelMedium *medium, const char *header_name);
static const void *get_header (CamelMedium *medium, const char *header_name);
static void set_content_object (CamelMedium *medium, CamelDataWrapper *content);
/* from camel mime parser */
static int construct_from_parser (CamelMimePart *, CamelMimeParser *);
/* forward references */
static void set_disposition (CamelMimePart *mime_part, const gchar *disposition);
/* loads in a hash table the set of header names we */
/* recognize and associate them with a unique enum */
/* identifier (see CamelHeaderType above) */
static void
init_header_name_table()
{
header_name_table = g_hash_table_new (g_strcase_hash, g_strcase_equal);
g_hash_table_insert (header_name_table, "Content-Description", (gpointer)HEADER_DESCRIPTION);
g_hash_table_insert (header_name_table, "Content-Disposition", (gpointer)HEADER_DISPOSITION);
g_hash_table_insert (header_name_table, "Content-id", (gpointer)HEADER_CONTENT_ID);
g_hash_table_insert (header_name_table, "Content-Transfer-Encoding", (gpointer)HEADER_ENCODING);
g_hash_table_insert (header_name_table, "Content-MD5", (gpointer)HEADER_CONTENT_MD5);
g_hash_table_insert (header_name_table, "Content-Type", (gpointer)HEADER_CONTENT_TYPE);
}
static void
camel_mime_part_class_init (CamelMimePartClass *camel_mime_part_class)
{
CamelMediumClass *camel_medium_class = CAMEL_MEDIUM_CLASS (camel_mime_part_class);
CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_mime_part_class);
parent_class = CAMEL_MEDIUM_CLASS (camel_type_get_global_classfuncs (camel_medium_get_type ()));
init_header_name_table();
camel_mime_part_class->construct_from_parser = construct_from_parser;
/* virtual method overload */
camel_medium_class->add_header = add_header;
camel_medium_class->set_header = set_header;
camel_medium_class->get_header = get_header;
camel_medium_class->remove_header = remove_header;
camel_medium_class->set_content_object = set_content_object;
camel_data_wrapper_class->write_to_stream = write_to_stream;
camel_data_wrapper_class->construct_from_stream= construct_from_stream;
}
static void
camel_mime_part_init (gpointer object, gpointer klass)
{
CamelMimePart *camel_mime_part = CAMEL_MIME_PART (object);
camel_mime_part->content_type = header_content_type_new ("text", "plain");
camel_mime_part->description = NULL;
camel_mime_part->disposition = NULL;
camel_mime_part->content_id = NULL;
camel_mime_part->content_MD5 = NULL;
camel_mime_part->content_languages = NULL;
camel_mime_part->encoding = CAMEL_MIME_PART_ENCODING_DEFAULT;
}
static void
camel_mime_part_finalize (CamelObject *object)
{
CamelMimePart *mime_part = CAMEL_MIME_PART (object);
g_free (mime_part->description);
g_free (mime_part->content_id);
g_free (mime_part->content_MD5);
string_list_free (mime_part->content_languages);
header_disposition_unref(mime_part->disposition);
if (mime_part->content_type)
header_content_type_unref (mime_part->content_type);
header_raw_clear(&mime_part->headers);
}
CamelType
camel_mime_part_get_type (void)
{
static CamelType camel_mime_part_type = CAMEL_INVALID_TYPE;
if (camel_mime_part_type == CAMEL_INVALID_TYPE) {
camel_mime_part_type = camel_type_register (CAMEL_MEDIUM_TYPE, "CamelMimePart",
sizeof (CamelMimePart),
sizeof (CamelMimePartClass),
(CamelObjectClassInitFunc) camel_mime_part_class_init,
NULL,
(CamelObjectInitFunc) camel_mime_part_init,
(CamelObjectFinalizeFunc) camel_mime_part_finalize);
}
return camel_mime_part_type;
}
/* **** */
static gboolean
process_header(CamelMedium *medium, const char *header_name, const char *header_value)
{
CamelMimePart *mime_part = CAMEL_MIME_PART (medium);
CamelHeaderType header_type;
char *text;
/* Try to parse the header pair. If it corresponds to something */
/* known, the job is done in the parsing routine. If not, */
/* we simply add the header in a raw fashion */
header_type = (CamelHeaderType) g_hash_table_lookup (header_name_table, header_name);
switch (header_type) {
case HEADER_DESCRIPTION: /* raw header->utf8 conversion */
text = header_decode_string(header_value);
g_free(mime_part->description);
mime_part->description = g_strstrip (text);
break;
case HEADER_DISPOSITION:
set_disposition(mime_part, header_value);
break;
case HEADER_CONTENT_ID:
text = header_msgid_decode(header_value);
g_free(mime_part->content_id);
mime_part->content_id = text;
break;
case HEADER_ENCODING:
text = header_token_decode(header_value);
mime_part->encoding = camel_mime_part_encoding_from_string (text);
g_free(text);
break;
case HEADER_CONTENT_MD5:
g_free(mime_part->content_MD5);
mime_part->content_MD5 = g_strdup(header_value);
break;
case HEADER_CONTENT_TYPE:
if (mime_part->content_type)
header_content_type_unref (mime_part->content_type);
mime_part->content_type = header_content_type_decode (header_value);
break;
default:
return FALSE;
}
return TRUE;
}
/* Note: It is my understanding that we need to encode the values here as they are
not being encoded at the header_raw_* level. */
/*
NO: This is absolutely wrong. The medium interface is entirely raw.
You cannot just go blingingly encoding headers because it depends entirely
on the header being encoded. process_header decodes and mirrors the
known headers, appropriately, and we just add this raw header to our
list.
Please read the comments, they explained it already!!!!!!!
*/
static void
set_header (CamelMedium *medium, const char *header_name, const void *header_value)
{
CamelMimePart *part = CAMEL_MIME_PART (medium);
process_header(medium, header_name, header_value);
header_raw_replace(&part->headers, header_name, header_value, -1);
}
static void
add_header (CamelMedium *medium, const char *header_name, const void *header_value)
{
CamelMimePart *part = CAMEL_MIME_PART (medium);
/* Try to parse the header pair. If it corresponds to something */
/* known, the job is done in the parsing routine. If not, */
/* we simply add the header in a raw fashion */
/* If it was one of the headers we handled, it must be unique, set it instead of add */
if (process_header(medium, header_name, header_value))
header_raw_replace(&part->headers, header_name, header_value, -1);
else
header_raw_append(&part->headers, header_name, header_value, -1);
}
static void
remove_header (CamelMedium *medium, const char *header_name)
{
CamelMimePart *part = (CamelMimePart *)medium;
process_header(medium, header_name, NULL);
header_raw_remove(&part->headers, header_name);
}
static const void *
get_header (CamelMedium *medium, const char *header_name)
{
CamelMimePart *part = (CamelMimePart *)medium;
return header_raw_find(&part->headers, header_name, NULL);
}
/* **** Content-Description */
void
camel_mime_part_set_description (CamelMimePart *mime_part, const gchar *description)
{
char *text = header_encode_string (description);
camel_medium_set_header (CAMEL_MEDIUM (mime_part),
"Content-Description", text);
g_free (text);
}
const gchar *
camel_mime_part_get_description (CamelMimePart *mime_part)
{
return mime_part->description;
}
/* **** Content-Disposition */
static void
set_disposition (CamelMimePart *mime_part, const gchar *disposition)
{
header_disposition_unref(mime_part->disposition);
if (disposition)
mime_part->disposition = header_disposition_decode(disposition);
else
mime_part->disposition = NULL;
}
void
camel_mime_part_set_disposition (CamelMimePart *mime_part, const gchar *disposition)
{
char *text;
/* we poke in a new disposition (so we dont lose 'filename', etc) */
if (mime_part->disposition == NULL) {
set_disposition(mime_part, disposition);
}
if (mime_part->disposition != NULL) {
g_free(mime_part->disposition->disposition);
mime_part->disposition->disposition = g_strdup(disposition);
}
text = header_disposition_format(mime_part->disposition);
camel_medium_set_header (CAMEL_MEDIUM (mime_part),
"Content-Disposition", text);
g_free(text);
}
const gchar *
camel_mime_part_get_disposition (CamelMimePart *mime_part)
{
if (mime_part->disposition)
return (mime_part->disposition)->disposition;
else
return NULL;
}
/* **** Content-Disposition: filename="xxx" */
void
camel_mime_part_set_filename (CamelMimePart *mime_part, const gchar *filename)
{
char *str;
if (mime_part->disposition == NULL)
mime_part->disposition = header_disposition_decode("attachment");
header_set_param(&mime_part->disposition->params, "filename", filename);
str = header_disposition_format(mime_part->disposition);
camel_medium_set_header (CAMEL_MEDIUM (mime_part),
"Content-Disposition", str);
g_free(str);
}
const gchar *
camel_mime_part_get_filename (CamelMimePart *mime_part)
{
if (mime_part->disposition) {
const gchar *name = header_param (mime_part->disposition->params, "filename");
if (name)
return name;
}
return header_content_type_param (mime_part->content_type, "name");
}
/* **** Content-ID: */
void
camel_mime_part_set_content_id (CamelMimePart *mime_part, const char *contentid)
{
camel_medium_set_header (CAMEL_MEDIUM (mime_part), "Content-ID",
contentid);
}
const gchar *
camel_mime_part_get_content_id (CamelMimePart *mime_part)
{
return mime_part->content_id;
}
/* **** Content-MD5: */
void
camel_mime_part_set_content_MD5 (CamelMimePart *mime_part, const char *md5)
{
camel_medium_set_header (CAMEL_MEDIUM (mime_part), "Content-MD5", md5);
}
const gchar *
camel_mime_part_get_content_MD5 (CamelMimePart *mime_part)
{
return mime_part->content_MD5;
}
/* **** Content-Transfer-Encoding: */
void
camel_mime_part_set_encoding (CamelMimePart *mime_part,
CamelMimePartEncodingType encoding)
{
const char *text;
text = camel_mime_part_encoding_to_string (encoding);
camel_medium_set_header (CAMEL_MEDIUM (mime_part),
"Content-Transfer-Encoding", text);
}
const CamelMimePartEncodingType
camel_mime_part_get_encoding (CamelMimePart *mime_part)
{
return mime_part->encoding;
}
/* FIXME: do something with this stuff ... */
void
camel_mime_part_set_content_languages (CamelMimePart *mime_part, GList *content_languages)
{
if (mime_part->content_languages) string_list_free (mime_part->content_languages);
mime_part->content_languages = content_languages;
/* FIXME: translate to a header and set it */
}
const GList *
camel_mime_part_get_content_languages (CamelMimePart *mime_part)
{
return mime_part->content_languages;
}
/* **** */
/* **** Content-Type: */
void
camel_mime_part_set_content_type (CamelMimePart *mime_part, gchar *content_type)
{
camel_medium_set_header (CAMEL_MEDIUM (mime_part),
"Content-Type", content_type);
}
CamelContentType *
camel_mime_part_get_content_type (CamelMimePart *mime_part)
{
return mime_part->content_type;
}
/*********/
static void
set_content_object (CamelMedium *medium, CamelDataWrapper *content)
{
CamelMimePart *mime_part = CAMEL_MIME_PART (medium);
CamelContentType *object_content_type;
parent_class->set_content_object (medium, content);
object_content_type = camel_data_wrapper_get_mime_type_field (content);
if (mime_part->content_type != object_content_type) {
char *txt;
txt = header_content_type_format (object_content_type);
camel_medium_set_header (CAMEL_MEDIUM (mime_part), "Content-Type", txt);
g_free(txt);
}
}
/**********************************************************************/
static int
write_to_stream(CamelDataWrapper *data_wrapper, CamelStream *stream)
{
CamelMimePart *mp = CAMEL_MIME_PART(data_wrapper);
CamelMedium *medium = CAMEL_MEDIUM(data_wrapper);
CamelDataWrapper *content;
int total = 0;
int count;
d(printf("mime_part::write_to_stream\n"));
/* FIXME: something needs to be done about this ... */
/* FIXME: need to count these bytes too */
#ifndef NO_WARNINGS
#warning content-languages should be stored as a header
#endif
if (mp->headers) {
struct _header_raw *h = mp->headers;
char *val;
while (h) {
val = h->value;
if (val == NULL) {
g_warning("h->value is NULL here for %s", h->name);
count = 0;
} else {
val = header_fold(val, strlen(h->name));
count = camel_stream_printf(stream, "%s%s%s\n", h->name, isspace(val[0]) ? ":" : ": ", val);
g_free(val);
}
if (count == -1)
return -1;
total += count;
h = h->next;
}
}
count = camel_stream_write(stream, "\n", 1);
if (count == -1)
return -1;
total += count;
content = camel_medium_get_content_object(medium);
if (content) {
/* I dont really like this here, but i dont know where else it might go ... */
#define CAN_THIS_GO_ELSEWHERE
#ifdef CAN_THIS_GO_ELSEWHERE
CamelMimeFilter *filter = NULL;
CamelStreamFilter *filter_stream = NULL;
CamelMimeFilter *charenc = NULL;
const char *charset;
switch(mp->encoding) {
case CAMEL_MIME_PART_ENCODING_BASE64:
filter = (CamelMimeFilter *)camel_mime_filter_basic_new_type(CAMEL_MIME_FILTER_BASIC_BASE64_ENC);
break;
case CAMEL_MIME_PART_ENCODING_QUOTEDPRINTABLE:
filter = (CamelMimeFilter *)camel_mime_filter_basic_new_type(CAMEL_MIME_FILTER_BASIC_QP_ENC);
break;
default:
break;
}
if (header_content_type_is(mp->content_type, "text", "*")) {
charset = header_content_type_param(mp->content_type, "charset");
if (!(charset == NULL || !strcasecmp(charset, "us-ascii") || !strcasecmp(charset, "utf-8"))) {
charenc = (CamelMimeFilter *)camel_mime_filter_charset_new_convert("utf-8", charset);
}
}
if (filter || charenc) {
filter_stream = camel_stream_filter_new_with_stream(stream);
/* if we have a character encoder, add that always */
if (charenc) {
camel_stream_filter_add(filter_stream, charenc);
camel_object_unref((CamelObject *)charenc);
}
/* we only re-do crlf on encoded blocks */
if (filter && header_content_type_is(mp->content_type, "text", "*")) {
CamelMimeFilter *crlf = camel_mime_filter_crlf_new(CAMEL_MIME_FILTER_CRLF_ENCODE,
CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
camel_stream_filter_add(filter_stream, crlf);
camel_object_unref((CamelObject *)crlf);
}
if (filter) {
camel_stream_filter_add(filter_stream, filter);
camel_object_unref((CamelObject *)filter);
}
stream = (CamelStream *)filter_stream;
}
#endif
count = camel_data_wrapper_write_to_stream(content, stream);
if (filter_stream) {
camel_stream_flush((CamelStream *)filter_stream);
camel_object_unref((CamelObject *)filter_stream);
}
if (count == -1)
return -1;
total += count;
} else {
g_warning("No content for medium, nothing to write");
}
return total;
}
/* mime_part */
static int
construct_from_parser(CamelMimePart *dw, CamelMimeParser *mp)
{
struct _header_raw *headers;
char *buf;
int len;
d(printf("mime_part::construct_from_parser()\n"));
switch (camel_mime_parser_step(mp, &buf, &len)) {
case HSCAN_MESSAGE:
/* set the default type of a message always */
if (dw->content_type)
header_content_type_unref (dw->content_type);
dw->content_type = header_content_type_decode ("message/rfc822");
case HSCAN_HEADER:
case HSCAN_MULTIPART:
/* we have the headers, build them into 'us' */
headers = camel_mime_parser_headers_raw(mp);
while (headers) {
camel_medium_add_header((CamelMedium *)dw, headers->name, headers->value);
headers = headers->next;
}
camel_mime_part_construct_content_from_parser(dw, mp);
break;
default:
g_warning("Invalid state encountered???: %d", camel_mime_parser_state(mp));
}
d(printf("mime_part::construct_from_parser() leaving\n"));
#ifndef NO_WARNINGS
#warning "Need to work out how to detect a (fatally) bad parse in the parser"
#endif
return 0;
}
/**
* camel_mime_part_construct_from_parser:
* @mime_part:
* @mp:
*
*
*
* Return value:
**/
int
camel_mime_part_construct_from_parser(CamelMimePart *mime_part, CamelMimeParser *mp)
{
return CMP_CLASS (mime_part)->construct_from_parser (mime_part, mp);
}
static int
construct_from_stream(CamelDataWrapper *dw, CamelStream *s)
{
CamelMimeParser *mp;
int ret;
d(printf("mime_part::construct_from_stream()\n"));
mp = camel_mime_parser_new();
if (camel_mime_parser_init_with_stream(mp, s) == -1) {
g_warning("Cannot create parser for stream");
ret = -1;
} else {
ret = camel_mime_part_construct_from_parser((CamelMimePart *)dw, mp);
}
camel_object_unref((CamelObject *)mp);
return ret;
}
/* this must be kept in sync with the header */
static const char *encodings[] = {
"",
"7bit",
"8bit",
"base64",
"quoted-printable",
"binary"
};
const char *
camel_mime_part_encoding_to_string (CamelMimePartEncodingType encoding)
{
if (encoding >= sizeof(encodings)/sizeof(encodings[0]))
encoding = 0;
return encodings[encoding];
}
/* FIXME I am not sure this is the correct way to do this. */
CamelMimePartEncodingType
camel_mime_part_encoding_from_string (const gchar *string)
{
int i;
if (string != NULL) {
for (i=0;i<sizeof(encodings)/sizeof(encodings[0]);i++)
if (!strcasecmp(string, encodings[i]))
return i;
}
return CAMEL_MIME_PART_ENCODING_DEFAULT;
}
/******************************/
/** Misc utility functions **/
/**
* camel_mime_part_new:
*
* Return value: a new CamelMimePart
**/
CamelMimePart *
camel_mime_part_new (void)
{
return (CamelMimePart *)camel_object_new (CAMEL_MIME_PART_TYPE);
}
/**
* camel_mime_part_set_content:
* @camel_mime_part: Mime part
* @data: data to put into the part
* @length: length of @data
* @type: Content-Type of the data
*
* Utility function used to set the content of a mime part object to
* be the provided data. If @length is 0, this routine can be used as
* a way to remove old content (in which case @data and @type are
* ignored and may be %NULL).
**/
void
camel_mime_part_set_content (CamelMimePart *camel_mime_part,
const char *data, int length,
const char *type) /* why on earth is the type last? */
{
CamelMedium *medium = CAMEL_MEDIUM (camel_mime_part);
if (length) {
CamelDataWrapper *dw;
CamelStream *stream;
dw = camel_data_wrapper_new ();
camel_data_wrapper_set_mime_type (dw, type);
stream = camel_stream_mem_new_with_buffer (data, length);
camel_data_wrapper_construct_from_stream (dw, stream);
camel_object_unref (CAMEL_OBJECT (stream));
camel_medium_set_content_object (medium, dw);
camel_object_unref (CAMEL_OBJECT (dw));
} else {
if (medium->content)
camel_object_unref (CAMEL_OBJECT (medium->content));
medium->content = NULL;
}
}
