Add a CamelMimeFilterStripHeader that removes a header from mime output. Used

by sendmail to strip the BCC from the email while still sending to the BCC
recipients.

camel:

2001-06-28  Peter Williams  <peterw@ximian.com>

        * camel-mime-filter-stripheader.c: New file. Filter that strips a
        header from mime output.

        * camel-mime-filter-stripheader.h: New file. Header for the above.

        * providers/smtp/camel-smtp-transport.c (smtp_data): Use the stripheader
        filter to remove the "Bcc" header.

        * Makefile.am: Add the stripheader files.

        * tests/lib/Makefile.am (INCLUDES): Get this to compile again.

        * tests/mime-filter/test-stripheader.c: New file. Test suite for
        the CamelMimeFilterStripHeader.

        * tests/mime-filter/Makefile.am: New test section: mime filters.

mail:

2001-06-28  Peter Williams  <peterw@ximian.com>

        * mail-ops.c (mail_send_message): Revert fejj's Bcc header removal;
        this unsets the BCC recipients and so doesn't send to the Bcc'd
        people at all.

svn path=/trunk/; revision=10576

1 files changed, 181 insertions, 0 deletions

diff --git a/camel/camel-mime-filter-stripheader.c b/camel/camel-mime-filter-stripheader.c
new file mode 100644
index 0000000000..5c78bf459c
--- /dev/null
+++ b/camel/camel-mime-filter-stripheader.c
@@ -0,0 +1,181 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ *  Copyright (C) 2000 Ximian, Inc.
+ *
+ *  Authors: Dan Winship <danw@ximian.com>
+ *           Jeffrey Stedfast <fejj@ximian.com>
+ *           Peter Williams <peterw@ximian.com>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ctype.h>
+#include <string.h>
+
+#include "camel-mime-filter-stripheader.h"
+
+static void filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+		    char **out, size_t *outlen, size_t *outprespace);
+static void complete (CamelMimeFilter *f, char *in, size_t len,
+		      size_t prespace, char **out, size_t *outlen,
+		      size_t *outprespace);
+static void reset (CamelMimeFilter *f);
+
+
+static void
+camel_mime_filter_stripheader_init (CamelMimeFilterStripHeader *cmf)
+{
+	cmf->seen_eoh = FALSE;
+	cmf->in_header = FALSE;
+	cmf->header = NULL;
+	cmf->header_len = 0;
+}
+
+static void
+camel_mime_filter_stripheader_finalize (CamelMimeFilterStripHeader *cmf)
+{
+	g_free (cmf->header);
+}
+
+static void
+camel_mime_filter_stripheader_class_init (CamelMimeFilterStripHeaderClass *klass)
+{
+	CamelMimeFilterClass *mime_filter_class =
+		(CamelMimeFilterClass *) klass;
+	
+	mime_filter_class->filter = filter;
+	mime_filter_class->complete = complete;
+	mime_filter_class->reset = reset;
+}
+
+CamelType
+camel_mime_filter_stripheader_get_type (void)
+{
+	static CamelType type = CAMEL_INVALID_TYPE;
+	
+	if (type == CAMEL_INVALID_TYPE) {
+		type = camel_type_register (camel_mime_filter_get_type(), "CamelMimeFilterStripHeader",
+					    sizeof (CamelMimeFilterStripHeader),
+					    sizeof (CamelMimeFilterStripHeaderClass),
+					    (CamelObjectClassInitFunc) camel_mime_filter_stripheader_class_init,
+					    NULL,
+					    (CamelObjectInitFunc) camel_mime_filter_stripheader_init,
+					    (CamelObjectFinalizeFunc) camel_mime_filter_stripheader_finalize);
+	}
+
+	return type;
+}
+
+static void
+filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+	char **out, size_t *outlen, size_t *outprespace)
+{
+	CamelMimeFilterStripHeader *sh = (CamelMimeFilterStripHeader *)f;
+	char *p, *q;
+	int left;
+
+	/* all done? */
+	if (sh->seen_eoh) {
+		*out = in;
+		*outlen = len;
+		*outprespace = prespace;
+		return;
+	}
+
+	/* nope */
+
+	camel_mime_filter_set_size (f, len, FALSE);
+
+	p = in;
+	q = f->outbuf;
+
+	while (p < (in + len)) {
+		if (*p == '\n') {
+			left = in + len - p;
+
+			/* Not enough left to do anything useful. */
+			if (left < (sh->header_len + 3)) {
+				camel_mime_filter_backup (f, p, left);
+				break;
+			}
+
+			/* MIME-ese for 'end of headers'. Our work here is done, */
+			if (!strncmp (p, "\n\n", 2)) {
+
+				if (sh->in_header) {
+				/* we've already got a \n */
+					p++;
+					left--;
+				}
+
+				sh->seen_eoh = TRUE;
+				memcpy (q, p, left);
+				q += left;
+				break;
+			}
+
+			/* (Maybe) Grab this \n */
+			if (!sh->in_header)
+				*q++ = *p;
+			p++;
+
+			if (!strncmp (p, sh->header, sh->header_len) && p[sh->header_len] == ':')
+				/* ok it seems we /are/ in the header */
+				sh->in_header = TRUE;
+			else if (!isspace ((int)(*p)))
+				/* if we were in a header and we are on a space
+				 * in_header will remain true...*/
+				sh->in_header = FALSE;
+
+		}
+
+		/* ok then */
+		if (!sh->in_header)
+			*q++ = *p;
+		p++;
+	}
+
+	*out = f->outbuf;
+	*outlen = q - f->outbuf;
+	*outprespace = f->outpre;
+}
+
+static void 
+complete (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+	  char **out, size_t *outlen, size_t *outprespace)
+{
+	if (len)
+		filter (f, in, len, prespace, out, outlen, outprespace);
+}
+
+static void
+reset (CamelMimeFilter *f)
+{
+	CamelMimeFilterStripHeader *sh = (CamelMimeFilterStripHeader *)f;
+
+	sh->seen_eoh = FALSE;
+	sh->in_header = FALSE;
+}
+
+CamelMimeFilter *
+camel_mime_filter_stripheader_new (const gchar *header)
+{
+	CamelMimeFilterStripHeader *sh = CAMEL_MIME_FILTER_STRIPHEADER(camel_object_new (CAMEL_MIME_FILTER_STRIPHEADER_TYPE));
+
+	sh->header = g_strdup (header);
+	sh->header_len = strlen (header);
+
+	return (CamelMimeFilter *)sh;
+}