/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Michael Zucchi <notzed@ximian.com>
* Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 2003 Ximian, Inc. (www.ximian.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 Street #330, Boston, MA 02111-1307, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <libgnomevfs/gnome-vfs-mime.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
#include <libgnomevfs/gnome-vfs-mime-handlers.h>
#include <e-util/e-msgport.h>
#include <camel/camel-url.h>
#include <camel/camel-stream.h>
#include <camel/camel-stream-mem.h>
#include <camel/camel-multipart.h>
#include <camel/camel-multipart-encrypted.h>
#include <camel/camel-multipart-signed.h>
#include <camel/camel-medium.h>
#include <camel/camel-mime-message.h>
#include <camel/camel-gpg-context.h>
#include <camel/camel-string-utils.h>
#include <camel/camel-stream-filter.h>
#include <camel/camel-stream-null.h>
#include <camel/camel-mime-filter-charset.h>
#include <camel/camel-mime-filter-windows.h>
#include "em-format.h"
#define d(x)
static void emf_builtin_init(EMFormatClass *);
static const char *emf_snoop_part(CamelMimePart *part);
static void emf_format_clone(EMFormat *emf, CamelMedium *msg, EMFormat *emfsource);
static gboolean emf_busy(EMFormat *emf);
enum {
EMF_COMPLETE,
EMF_LAST_SIGNAL,
};
static guint emf_signals[EMF_LAST_SIGNAL];
static GObjectClass *emf_parent;
static void
emf_init(GObject *o)
{
EMFormat *emf = (EMFormat *)o;
emf->inline_table = g_hash_table_new(NULL, NULL);
e_dlist_init(&emf->header_list);
em_format_default_headers(emf);
}
static void
emf_finalise(GObject *o)
{
EMFormat *emf = (EMFormat *)o;
if (emf->session)
camel_object_unref(emf->session);
if (emf->inline_table)
g_hash_table_destroy(emf->inline_table);
em_format_clear_headers(emf);
g_free(emf->charset);
/* FIXME: check pending jobs */
((GObjectClass *)emf_parent)->finalize(o);
}
static void
emf_base_init(EMFormatClass *emfklass)
{
emfklass->type_handlers = g_hash_table_new(g_str_hash, g_str_equal);
emf_builtin_init(emfklass);
}
static void
emf_class_init(GObjectClass *klass)
{
((EMFormatClass *)klass)->type_handlers = g_hash_table_new(g_str_hash, g_str_equal);
emf_builtin_init((EMFormatClass *)klass);
klass->finalize = emf_finalise;
((EMFormatClass *)klass)->format_clone = emf_format_clone;
((EMFormatClass *)klass)->busy = emf_busy;
emf_signals[EMF_COMPLETE] =
g_signal_new("complete",
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EMFormatClass, complete),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
GType
em_format_get_type(void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof(EMFormatClass),
(GBaseInitFunc)emf_base_init, NULL,
(GClassInitFunc)emf_class_init,
NULL, NULL,
sizeof(EMFormat), 0,
(GInstanceInitFunc)emf_init
};
emf_parent = g_type_class_ref(G_TYPE_OBJECT);
type = g_type_register_static(G_TYPE_OBJECT, "EMFormat", &info, 0);
}
return type;
}
/**
* em_format_class_add_handler:
* @emfc: EMFormatClass
* @info: Callback information.
*
* Add a mime type handler to this class. This is only used by implementing
* classes.
*
* When a mime type described by @info is encountered, the callback will
* be invoked. Note that @info may be extended by sub-classes if
* they require additional context information.
*
* Use a mime type of "foo/ *" to insert a fallback handler for type "foo".
**/
void
em_format_class_add_handler(EMFormatClass *emfc, EMFormatHandler *info)
{
g_hash_table_insert(emfc->type_handlers, info->mime_type, info);
/* FIXME: do we care? This is really gui stuff */
/*
if (info->applications == NULL)
info->applications = gnome_vfs_mime_get_short_list_applications(info->mime_type);*/
}
/**
* em_format_class_remove_handler:
* @emfc: EMFormatClass
* @mime_type: mime-type of handler to remove
*
* Remove a mime type handler from this class. This is only used by
* implementing classes.
**/
void
em_format_class_remove_handler (EMFormatClass *emfc, const char *mime_type)
{
g_hash_table_remove (emfc->type_handlers, mime_type);
}
/**
* em_format_find_handler:
* @emf:
* @mime_type:
*
* Find a format handler by @mime_type.
*
* Return value: NULL if no handler is available.
**/
const EMFormatHandler *
em_format_find_handler(EMFormat *emf, const char *mime_type)
{
EMFormatClass *emfc = (EMFormatClass *)G_OBJECT_GET_CLASS(emf);
return g_hash_table_lookup(emfc->type_handlers, mime_type);
}
/**
* em_format_fallback_handler:
* @emf:
* @mime_type:
*
* Try to find a format handler based on the major type of the @mime_type.
*
* The subtype is replaced with "*" and a lookup performed.
*
* Return value:
**/
const EMFormatHandler *
em_format_fallback_handler(EMFormat *emf, const char *mime_type)
{
char *mime, *s;
s = strchr(mime_type, '/');
if (s == NULL)
mime = (char *)mime_type;
else {
size_t len = (s-mime_type)+1;
mime = alloca(len+2);
strncpy(mime, mime_type, len);
strcpy(mime+len, "*");
}
return em_format_find_handler(emf, mime);
}
/**
* em_format_add_puri:
* @emf:
* @size:
* @cid: Override the autogenerated content id.
* @part:
* @func:
*
* Add a pending-uri handler. When formatting parts that reference
* other parts, a pending-uri (PURI) can be used to track the reference.
*
* @size is used to allocate the structure, so that it can be directly
* subclassed by implementors.
*
* @cid can be used to override the key used to retreive the PURI, if NULL,
* then the content-location and the content-id of the @part are stored
* as lookup keys for the part.
*
* FIXME: This may need a free callback.
*
* Return value: A new PURI, with a referenced copy of @part, and the cid
* always set. The uri will be set if one is available. Clashes
* are resolved by forgetting the old PURI in the global index.
**/
EMFormatPURI *
em_format_add_puri(EMFormat *emf, size_t size, const char *cid, CamelMimePart *part, EMFormatPURIFunc func)
{
EMFormatPURI *puri;
const char *tmp;
static unsigned int uriid;
g_assert(size >= sizeof(*puri));
puri = g_malloc0(size);
puri->format = emf;
puri->func = func;
puri->use_count = 0;
puri->cid = g_strdup(cid);
if (part) {
camel_object_ref(part);
puri->part = part;
}
if (part != NULL && cid == NULL) {
tmp = camel_mime_part_get_content_id(part);
if (tmp)
puri->cid = g_strdup_printf("cid:%s", tmp);
else
puri->cid = g_strdup_printf("em-no-cid-%u", uriid++);
d(printf("built cid '%s'\n", puri->cid));
/* not quite same as old behaviour, it also put in the relative uri and a fallback for no parent uri */
tmp = camel_mime_part_get_content_location(part);
puri->uri = NULL;
if (tmp == NULL) {
if (emf->base)
puri->uri = camel_url_to_string(emf->base, 0);
} else {
if (strchr(tmp, ':') == NULL && emf->base != NULL) {
CamelURL *uri;
uri = camel_url_new_with_base(emf->base, tmp);
puri->uri = camel_url_to_string(uri, 0);
camel_url_free(uri);
} else {
puri->uri = g_strdup(tmp);
}
}
}
g_assert(puri->cid != NULL);
g_assert(emf->pending_uri_level != NULL);
g_assert(emf->pending_uri_table != NULL);
e_dlist_addtail(&emf->pending_uri_level->uri_list, (EDListNode *)puri);
if (puri->uri)
g_hash_table_insert(emf->pending_uri_table, puri->uri, puri);
g_hash_table_insert(emf->pending_uri_table, puri->cid, puri);
return puri;
}
/**
* em_format_push_level:
* @emf:
*
* This is used to build a heirarchy of visible PURI objects based on
* the structure of the message. Used by multipart/alternative formatter.
*
* FIXME: This could probably also take a uri so it can automaticall update
* the base location.
**/
void
em_format_push_level(EMFormat *emf)
{
struct _EMFormatPURITree *purilist;
d(printf("em_format_push_level\n"));
purilist = g_malloc0(sizeof(*purilist));
e_dlist_init(&purilist->children);
e_dlist_init(&purilist->uri_list);
purilist->parent = emf->pending_uri_level;
if (emf->pending_uri_tree == NULL) {
emf->pending_uri_tree = purilist;
} else {
e_dlist_addtail(&emf->pending_uri_level->children, (EDListNode *)purilist);
}
emf->pending_uri_level = purilist;
}
/**
* em_format_pull_level:
* @emf:
*
* Drop a level of visibility back to the parent. Note that
* no PURI values are actually freed.
**/
void
em_format_pull_level(EMFormat *emf)
{
d(printf("em_format_pull_level\n"));
emf->pending_uri_level = emf->pending_uri_level->parent;
}
/**
* em_format_find_visible_puri:
* @emf:
* @uri:
*
* Search for a PURI based on the visibility defined by :push_level()
* and :pull_level().
*
* Return value:
**/
EMFormatPURI *
em_format_find_visible_puri(EMFormat *emf, const char *uri)
{
EMFormatPURI *pw;
struct _EMFormatPURITree *ptree;
d(printf("checking for visible uri '%s'\n", uri));
ptree = emf->pending_uri_level;
while (ptree) {
pw = (EMFormatPURI *)ptree->uri_list.head;
while (pw->next) {
d(printf(" pw->uri = '%s' pw->cid = '%s\n", pw->uri?pw->uri:"", pw->cid));
if ((pw->uri && !strcmp(pw->uri, uri)) || !strcmp(pw->cid, uri))
return pw;
pw = pw->next;
}
ptree = ptree->parent;
}
return NULL;
}
/**
* em_format_find_puri:
* @emf:
* @uri:
*
* Search for a PURI based on a uri. Both the content-id
* and content-location are checked.
*
* Return value:
**/
EMFormatPURI *
em_format_find_puri(EMFormat *emf, const char *uri)
{
return g_hash_table_lookup(emf->pending_uri_table, uri);
}
static void
emf_clear_puri_node(struct _EMFormatPURITree *node)
{
{
EMFormatPURI *pw, *pn;
/* clear puri's at this level */
pw = (EMFormatPURI *)node->uri_list.head;
pn = pw->next;
while (pn) {
g_free(pw->uri);
g_free(pw->cid);
if (pw->part)
camel_object_unref(pw->part);
g_free(pw);
pw = pn;
pn = pn->next;
}
}
{
struct _EMFormatPURITree *cw, *cn;
/* clear child nodes */
cw = (struct _EMFormatPURITree *)node->children.head;
cn = cw->next;
while (cn) {
emf_clear_puri_node(cw);
cw = cn;
cn = cn->next;
}
}
g_free(node);
}
/**
* em_format_clear_puri_tree:
* @emf:
*
* For use by implementors to clear out the message structure
* data.
**/
void
em_format_clear_puri_tree(EMFormat *emf)
{
d(printf("clearing pending uri's\n"));
if (emf->pending_uri_table) {
g_hash_table_destroy(emf->pending_uri_table);
emf_clear_puri_node(emf->pending_uri_tree);
emf->pending_uri_level = NULL;
emf->pending_uri_tree = NULL;
}
emf->pending_uri_table = g_hash_table_new(g_str_hash, g_str_equal);
em_format_push_level(emf);
}
/* use mime_type == NULL to force showing as application/octet-stream */
void
em_format_part_as(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const char *mime_type)
{
const EMFormatHandler *handle = NULL;
if (mime_type != NULL) {
if (g_ascii_strcasecmp(mime_type, "application/octet-stream") == 0)
mime_type = emf_snoop_part(part);
handle = em_format_find_handler(emf, mime_type);
if (handle == NULL)
handle = em_format_fallback_handler(emf, mime_type);
if (handle != NULL
&& !em_format_is_attachment(emf, part)) {
d(printf("running handler for type '%s'\n", mime_type));
handle->handler(emf, stream, part, handle);
return;
}
d(printf("this type is an attachment? '%s'\n", mime_type));
} else {
mime_type = "application/octet-stream";
}
((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_attachment(emf, stream, part, mime_type, handle);
}
void
em_format_part(EMFormat *emf, CamelStream *stream, CamelMimePart *part)
{
char *mime_type;
CamelDataWrapper *dw;
dw = camel_medium_get_content_object((CamelMedium *)part);
mime_type = camel_data_wrapper_get_mime_type(dw);
camel_strdown(mime_type);
em_format_part_as(emf, stream, part, mime_type);
g_free(mime_type);
}
static void
emf_clone_inlines(void *key, void *val, void *data)
{
g_hash_table_insert(((EMFormat *)data)->inline_table, key, val);
}
static void
emf_format_clone(EMFormat *emf, CamelMedium *msg, EMFormat *emfsource)
{
em_format_clear_puri_tree(emf);
if (emf != emfsource) {
g_hash_table_destroy(emf->inline_table);
emf->inline_table = g_hash_table_new(NULL, NULL);
if (emfsource) {
/* We clone the current state here */
g_hash_table_foreach(emfsource->inline_table, emf_clone_inlines, emf);
emf->mode = emfsource->mode;
g_free(emf->charset);
emf->charset = g_strdup(emfsource->charset);
/* FIXME: clone headers shown */
}
}
if (msg != emf->message) {
if (emf->message)
camel_object_unref(emf->message);
if (msg)
camel_object_ref(msg);
emf->message = msg;
}
}
static gboolean
emf_busy(EMFormat *emf)
{
return FALSE;
}
/**
* em_format_format_clone:
* @emf: Mail formatter.
* @msg: Mail message.
* @emfsource: Used as a basis for user-altered layout, e.g. inline viewed
* attachments.
*
* Format a message @msg. If @emfsource is non NULL, then the status of
* inlined expansion and so forth is copied direction from @emfsource.
*
* By passing the same value for @emf and @emfsource, you can perform
* a display refresh, or it can be used to generate an identical layout,
* e.g. to print what the user has shown inline.
**/
/* e_format_format_clone is a macro */
/**
* em_format_set_session:
* @emf:
* @s:
*
* Set the CamelSession to be used for signature verification and decryption
* purposes. If this is not set, then signatures cannot be verified or
* encrypted messages viewed.
**/
void
em_format_set_session(EMFormat *emf, struct _CamelSession *s)
{
if (s)
camel_object_ref(s);
if (emf->session)
camel_object_unref(emf->session);
emf->session = s;
}
/**
* em_format_set_mode:
* @emf:
* @type:
*
* Set display mode, EM_FORMAT_SOURCE, EM_FORMAT_ALLHEADERS, or
* EM_FORMAT_NORMAL.
**/
void
em_format_set_mode(EMFormat *emf, em_format_mode_t type)
{
if (emf->mode == type)
return;
emf->mode = type;
/* force redraw if type changed afterwards */
if (emf->message)
em_format_format_clone(emf, emf->message, emf);
}
/**
* em_format_set_charset:
* @emf:
* @charset:
*
* set override charset on formatter. message will be redisplayed if
* required.
**/
void
em_format_set_charset(EMFormat *emf, const char *charset)
{
if ((emf->charset && charset && g_ascii_strcasecmp(emf->charset, charset) == 0)
|| (emf->charset == NULL && charset == NULL)
|| (emf->charset == charset))
return;
g_free(emf->charset);
emf->charset = g_strdup(charset);
if (emf->message)
em_format_format_clone(emf, emf->message, emf);
}
/**
* em_format_set_default_charset:
* @emf:
* @charset:
*
* Set the fallback, default system charset to use when no other charsets
* are present. Message will be redisplayed if required (and sometimes redisplayed
* when it isn't).
**/
void
em_format_set_default_charset(EMFormat *emf, const char *charset)
{
if ((emf->default_charset && charset && g_ascii_strcasecmp(emf->default_charset, charset) == 0)
|| (emf->default_charset == NULL && charset == NULL)
|| (emf->default_charset == charset))
return;
g_free(emf->default_charset);
emf->default_charset = g_strdup(charset);
if (emf->message && emf->charset == NULL)
em_format_format_clone(emf, emf->message, emf);
}
/**
* em_format_clear_headers:
* @emf:
*
* Clear the list of headers to be displayed. This will force all headers to
* be shown.
**/
void
em_format_clear_headers(EMFormat *emf)
{
EMFormatHeader *eh;
while ((eh = (EMFormatHeader *)e_dlist_remhead(&emf->header_list)))
g_free(eh);
}
static const struct {
const char *name;
guint32 flags;
} default_headers[] = {
{ N_("From"), EM_FORMAT_HEADER_BOLD },
{ N_("Reply-To"), EM_FORMAT_HEADER_BOLD },
{ N_("To"), EM_FORMAT_HEADER_BOLD },
{ N_("Cc"), EM_FORMAT_HEADER_BOLD },
{ N_("Bcc"), EM_FORMAT_HEADER_BOLD },
{ N_("Subject"), EM_FORMAT_HEADER_BOLD },
{ N_("Date"), EM_FORMAT_HEADER_BOLD },
{ "x-evolution-mailer", 0 }, /* DO NOT translate */
};
/**
* em_format_default_headers:
* @emf:
*
* Set the headers to show to the default list.
*
* From, Reply-To, To, Cc, Bcc, Subject and Date.
**/
void
em_format_default_headers(EMFormat *emf)
{
int i;
em_format_clear_headers(emf);
for (i=0;i<sizeof(default_headers)/sizeof(default_headers[0]);i++)
em_format_add_header(emf, default_headers[i].name, default_headers[i].flags);
}
/**
* em_format_add_header:
* @emf:
* @name: The name of the header, as it will appear during output.
* @flags: EM_FORMAT_HEAD_* defines to control display attributes.
*
* Add a specific header to show. If any headers are set, they will
* be displayed in the order set by this function. Certain known
* headers included in this list will be shown using special
* formatting routines.
**/
void em_format_add_header(EMFormat *emf, const char *name, guint32 flags)
{
EMFormatHeader *h;
h = g_malloc(sizeof(*h) + strlen(name));
h->flags = flags;
strcpy(h->name, name);
e_dlist_addtail(&emf->header_list, (EDListNode *)h);
}
/**
* em_format_is_attachment:
* @emf:
* @part: Part to check.
*
* Returns true if the part is an attachment.
*
* A part is not considered an attachment if it is a
* multipart, or a text part with no filename. It is used
* to determine if an attachment header should be displayed for
* the part.
*
* Content-Disposition is not checked.
*
* Return value: TRUE/FALSE
**/
int em_format_is_attachment(EMFormat *emf, CamelMimePart *part)
{
/*CamelContentType *ct = camel_mime_part_get_content_type(part);*/
CamelDataWrapper *dw = camel_medium_get_content_object((CamelMedium *)part);
/*printf("checking is attachment %s/%s\n", ct->type, ct->subtype);*/
return !(/*camel_content_type_is (ct, "message", "*")
||*/ camel_content_type_is (dw->mime_type, "multipart", "*")
|| (camel_content_type_is (dw->mime_type, "text", "*")
&& camel_mime_part_get_filename(part) == NULL));
}
/**
* em_format_is_inline:
* @emf:
* @part:
*
* Returns true if the part should be displayed inline. Any part with
* a Content-Disposition of inline, or any message type is displayed
* inline.
*
* ::set_inline() called on the same part will override any calculated
* value.
*
* Return value:
**/
int em_format_is_inline(EMFormat *emf, CamelMimePart *part)
{
void *dummy, *override;
const char *tmp;
CamelContentType *ct;
if (g_hash_table_lookup_extended(emf->inline_table, part, &dummy, &override))
return GPOINTER_TO_INT(override);
tmp = camel_mime_part_get_disposition(part);
if (tmp)
return g_ascii_strcasecmp(tmp, "inline") == 0;
/* messages are always inline? */
ct = camel_mime_part_get_content_type(part);
return camel_content_type_is (ct, "message", "*");
}
/**
* em_format_set_inline:
* @emf:
* @part:
* @state:
*
* Force the attachment @part to be expanded or hidden explictly to match
* @state. This is used only to record the change for a redraw or
* cloned layout render and does not force a redraw.
**/
void em_format_set_inline(EMFormat *emf, CamelMimePart *part, int state)
{
g_hash_table_insert(emf->inline_table, part, GINT_TO_POINTER(state));
}
/* should this be virtual? */
void
em_format_format_content(EMFormat *emf, CamelStream *stream, CamelMimePart *part)
{
CamelDataWrapper *dw = camel_medium_get_content_object((CamelMedium *)part);
if (camel_content_type_is (dw->mime_type, "text", "*"))
em_format_format_text(emf, stream, dw);
else
camel_data_wrapper_decode_to_stream(dw, stream);
}
/**
* em_format_format_content:
* @emf:
* @stream: Where to write the converted text
* @part: Part whose container is to be formatted
*
* Decode/output a part's content to @stream.
**/
void
em_format_format_text(EMFormat *emf, CamelStream *stream, CamelDataWrapper *dw)
{
CamelStreamFilter *filter_stream;
CamelMimeFilterCharset *filter;
const char *charset = NULL;
if (emf->charset) {
charset = emf->charset;
} else if (dw->mime_type
&& (charset = camel_content_type_param (dw->mime_type, "charset"))
&& g_ascii_strncasecmp(charset, "iso-8859-", 9) == 0) {
CamelMimeFilterWindows *windows;
CamelStream *null;
/* Since a few Windows mailers like to claim they sent
* out iso-8859-# encoded text when they really sent
* out windows-cp125#, do some simple sanity checking
* before we move on... */
null = camel_stream_null_new();
filter_stream = camel_stream_filter_new_with_stream(null);
camel_object_unref(null);
windows = (CamelMimeFilterWindows *)camel_mime_filter_windows_new(charset);
camel_stream_filter_add(filter_stream, (CamelMimeFilter *)windows);
camel_data_wrapper_decode_to_stream(dw, (CamelStream *)filter_stream);
camel_stream_flush((CamelStream *)filter_stream);
camel_object_unref(filter_stream);
charset = camel_mime_filter_windows_real_charset (windows);
camel_object_unref(windows);
} else if (charset == NULL) {
charset = emf->default_charset;
}
filter_stream = camel_stream_filter_new_with_stream(stream);
if ((filter = camel_mime_filter_charset_new_convert(charset, "UTF-8"))) {
camel_stream_filter_add(filter_stream, (CamelMimeFilter *) filter);
camel_object_unref(filter);
}
camel_data_wrapper_decode_to_stream(dw, (CamelStream *)filter_stream);
camel_stream_flush((CamelStream *)filter_stream);
camel_object_unref(filter_stream);
}
/**
* em_format_describe_part:
* @part:
* @mimetype:
*
* Generate a simple textual description of a part, @mime_type represents the
* the content.
*
* Return value:
**/
char *
em_format_describe_part(CamelMimePart *part, const char *mime_type)
{
GString *stext;
const char *text;
char *out;
stext = g_string_new("");
text = gnome_vfs_mime_get_description(mime_type);
g_string_append_printf(stext, _("%s attachment"), text?text:mime_type);
if ((text = camel_mime_part_get_filename (part)))
g_string_append_printf(stext, " (%s)", text);
if ((text = camel_mime_part_get_description(part)))
g_string_append_printf(stext, ", \"%s\"", text);
out = stext->str;
g_string_free(stext, FALSE);
return out;
}
/* ********************************************************************** */
/* originally from mail-identify.c */
static const char *
emf_snoop_part(CamelMimePart *part)
{
const char *filename, *name_type = NULL, *magic_type = NULL;
CamelDataWrapper *dw;
filename = camel_mime_part_get_filename (part);
if (filename) {
/* GNOME-VFS will misidentify TNEF attachments as MPEG */
if (!strcmp (filename, "winmail.dat"))
return "application/vnd.ms-tnef";
name_type = gnome_vfs_mime_type_from_name(filename);
}
dw = camel_medium_get_content_object((CamelMedium *)part);
if (!camel_data_wrapper_is_offline(dw)) {
CamelStreamMem *mem = (CamelStreamMem *)camel_stream_mem_new();
if (camel_data_wrapper_decode_to_stream(dw, (CamelStream *)mem) > 0)
magic_type = gnome_vfs_get_mime_type_for_data(mem->buffer->data, mem->buffer->len);
camel_object_unref(mem);
}
d(printf("snooped part, magic_type '%s' name_type '%s'\n", magic_type, name_type));
/* If GNOME-VFS doesn't recognize the data by magic, but it
* contains English words, it will call it text/plain. If the
* filename-based check came up with something different, use
* that instead and if it returns "application/octet-stream"
* try to do better with the filename check.
*/
if (magic_type) {
if (name_type
&& (!strcmp(magic_type, "text/plain")
|| !strcmp(magic_type, "application/octet-stream")))
return name_type;
else
return magic_type;
} else
return name_type;
/* We used to load parts to check their type, we dont anymore,
see bug #11778 for some discussion */
}
/* RFC 1740 */
static void
emf_multipart_appledouble(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMultipart *mp = (CamelMultipart *)camel_medium_get_content_object((CamelMedium *)part);
if (!CAMEL_IS_MULTIPART(mp)) {
em_format_format_source(emf, stream, part);
return;
}
/* try the data fork for something useful, doubtful but who knows */
em_format_part(emf, stream, camel_multipart_get_part(mp, 1));
}
/* RFC ??? */
static void
emf_multipart_mixed(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMultipart *mp = (CamelMultipart *)camel_medium_get_content_object((CamelMedium *)part);
int i, nparts;
if (!CAMEL_IS_MULTIPART(mp)) {
em_format_format_source(emf, stream, part);
return;
}
nparts = camel_multipart_get_number(mp);
for (i = 0; i < nparts; i++) {
if (i != 0)
camel_stream_printf (stream, "<hr>\n");
part = camel_multipart_get_part(mp, i);
em_format_part(emf, stream, part);
}
}
/* RFC 1740 */
static void
emf_multipart_alternative(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMultipart *mp = (CamelMultipart *)camel_medium_get_content_object((CamelMedium *)part);
int i, nparts;
CamelMimePart *best = NULL;
if (!CAMEL_IS_MULTIPART(mp)) {
em_format_format_source(emf, stream, part);
return;
}
/* as per rfc, find the last part we know how to display */
nparts = camel_multipart_get_number(mp);
for (i = 0; i < nparts; i++) {
CamelMimePart *part = camel_multipart_get_part(mp, i);
CamelContentType *type = camel_mime_part_get_content_type (part);
char *mime_type = camel_content_type_simple (type);
camel_strdown (mime_type);
/*if (want_plain && !strcmp (mime_type, "text/plain"))
return part;*/
if (em_format_find_handler(emf, mime_type)
|| (best == NULL && em_format_fallback_handler(emf, mime_type)))
best = part;
g_free(mime_type);
}
if (best)
em_format_part(emf, stream, best);
else
emf_multipart_mixed(emf, stream, part, info);
}
static void
emf_multipart_encrypted(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMultipartEncrypted *mpe;
CamelMimePart *mime_part;
CamelCipherContext *cipher;
CamelException ex;
const char *protocol;
/* Currently we only handle RFC2015-style PGP encryption. */
protocol = camel_content_type_param (((CamelDataWrapper *) part)->mime_type, "protocol");
if (!protocol || strcmp (protocol, "application/pgp-encrypted") != 0)
return emf_multipart_mixed(emf, stream, part, info);
mpe = (CamelMultipartEncrypted *)camel_medium_get_content_object((CamelMedium *)part);
if (!CAMEL_IS_MULTIPART_ENCRYPTED(mpe)) {
em_format_format_source(emf, stream, part);
return;
}
camel_exception_init (&ex);
cipher = camel_gpg_context_new(emf->session);
mime_part = camel_multipart_encrypted_decrypt(mpe, cipher, &ex);
camel_object_unref(cipher);
if (camel_exception_is_set(&ex)) {
/* FIXME: error handler */
em_format_format_error(emf, stream, camel_exception_get_description(&ex));
camel_exception_clear(&ex);
return;
}
em_format_part(emf, stream, mime_part);
camel_object_unref(mime_part);
}
static void
emf_write_related(EMFormat *emf, CamelStream *stream, EMFormatPURI *puri)
{
em_format_format_content(emf, stream, puri->part);
camel_stream_close(stream);
}
/* RFC 2387 */
static void
emf_multipart_related(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMultipart *mp = (CamelMultipart *)camel_medium_get_content_object((CamelMedium *)part);
CamelMimePart *body_part, *display_part = NULL;
CamelContentType *content_type;
const char *location, *start;
int i, nparts;
CamelURL *base_save = NULL;
struct _EMFormatPURITree *ptree;
EMFormatPURI *puri, *purin;
if (!CAMEL_IS_MULTIPART(mp)) {
em_format_format_source(emf, stream, part);
return;
}
/* FIXME: put this stuff in a shared function */
nparts = camel_multipart_get_number(mp);
content_type = camel_mime_part_get_content_type(part);
start = camel_content_type_param (content_type, "start");
if (start && strlen(start)>2) {
int len;
const char *cid;
/* strip <>'s */
len = strlen (start) - 2;
start++;
for (i=0; i<nparts; i++) {
body_part = camel_multipart_get_part(mp, i);
cid = camel_mime_part_get_content_id(body_part);
if (cid && !strncmp(cid, start, len) && strlen(cid) == len) {
display_part = body_part;
break;
}
}
} else {
display_part = camel_multipart_get_part(mp, 0);
}
if (display_part == NULL) {
emf_multipart_mixed(emf, stream, part, info);
return;
}
/* stack of present location and pending uri's */
location = camel_mime_part_get_content_location(part);
if (location) {
d(printf("setting content location %s\n", location));
base_save = emf->base;
emf->base = camel_url_new(location, NULL);
}
em_format_push_level(emf);
/* queue up the parts for possible inclusion */
for (i = 0; i < nparts; i++) {
body_part = camel_multipart_get_part(mp, i);
if (body_part != display_part) {
puri = em_format_add_puri(emf, sizeof(EMFormatPURI), NULL, body_part, emf_write_related);
d(printf(" part '%s' '%s' added\n", puri->uri?puri->uri:"", puri->cid));
}
}
em_format_part(emf, stream, display_part);
camel_stream_flush(stream);
ptree = emf->pending_uri_level;
puri = (EMFormatPURI *)ptree->uri_list.head;
purin = puri->next;
while (purin) {
if (purin->use_count == 0) {
d(printf("part '%s' '%s' used '%d'\n", purin->uri?purin->uri:"", purin->cid, purin->use_count));
if (purin->func == emf_write_related)
em_format_part(emf, stream, puri->part);
else
printf("unreferenced uri generated by format code: %s\n", purin->uri?purin->uri:purin->cid);
}
puri = purin;
purin = purin->next;
}
em_format_pull_level(emf);
if (location) {
camel_url_free(emf->base);
emf->base = base_save;
}
}
/* this is only a fallback implementation, implementations should override */
static void
emf_multipart_signed(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelMimePart *cpart, *spart;
CamelMultipartSigned *mps;
CamelCipherValidity *valid = NULL;
CamelException ex;
const char *message = NULL;
gboolean good = FALSE;
CamelCipherContext *cipher;
mps = (CamelMultipartSigned *)camel_medium_get_content_object((CamelMedium *)part);
if (!CAMEL_IS_MULTIPART_SIGNED(mps)
|| (cpart = camel_multipart_get_part((CamelMultipart *)mps, CAMEL_MULTIPART_SIGNED_CONTENT)) == NULL) {
em_format_format_source(emf, stream, part);
return;
}
em_format_part(emf, stream, cpart);
spart = camel_multipart_get_part((CamelMultipart *)mps, CAMEL_MULTIPART_SIGNED_SIGNATURE);
camel_exception_init(&ex);
if (spart == NULL) {
message = _("No signature present");
} else if (emf->session == NULL) {
message = _("Session not initialised");
} else if ((cipher = camel_gpg_context_new(emf->session)) == NULL) {
message = _("Could not create signature verfication context");
} else {
valid = camel_multipart_signed_verify(mps, cipher, &ex);
camel_object_unref(cipher);
if (valid) {
good = camel_cipher_validity_get_valid(valid);
message = camel_cipher_validity_get_description(valid);
} else {
message = camel_exception_get_description(&ex);
}
}
if (good)
em_format_format_error(emf, stream, _("This message is digitally signed and has been found to be authentic."));
else
em_format_format_error(emf, stream, _("This message is digitally signed but can not be proven to be authentic."));
if (message)
em_format_format_error(emf, stream, message);
camel_exception_clear(&ex);
camel_cipher_validity_free(valid);
}
/* this is only a fallback, any implementer should implement */
static void
emf_message_rfc822(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
CamelDataWrapper *dw = camel_medium_get_content_object((CamelMedium *)part);
if (!CAMEL_IS_MIME_MESSAGE(dw)) {
em_format_format_source(emf, stream, part);
return;
}
em_format_format_message(emf, stream, (CamelMedium *)dw);
}
static EMFormatHandler type_builtin_table[] = {
{ "multipart/alternative", emf_multipart_alternative },
{ "multipart/appledouble", emf_multipart_appledouble },
{ "multipart/encrypted", emf_multipart_encrypted },
{ "multipart/mixed", emf_multipart_mixed },
{ "multipart/signed", emf_multipart_signed },
{ "multipart/related", emf_multipart_related },
{ "multipart/*", emf_multipart_mixed },
{ "message/rfc822", emf_message_rfc822 },
{ "message/news", emf_message_rfc822 },
{ "message/*", emf_message_rfc822 },
};
static void
emf_builtin_init(EMFormatClass *klass)
{
int i;
for (i=0;i<sizeof(type_builtin_table)/sizeof(type_builtin_table[0]);i++)
g_hash_table_insert(klass->type_handlers, type_builtin_table[i].mime_type, &type_builtin_table[i]);
}
