3 * mhoutsbr.c -- routines to output MIME messages
4 * -- given a Content structure
6 * This code is Copyright (c) 2002, by the authors of nmh. See the
7 * COPYRIGHT file in the root directory of the nmh distribution for
8 * complete copyright information.
13 #include <h/signals.h>
20 #include <h/mhparse.h>
25 static char ebcdicsafe[0x100] = {
26 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
27 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
28 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
29 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
30 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
31 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
32 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
33 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
34 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
35 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
36 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
37 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01,
38 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
39 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
40 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
41 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
42 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
43 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
44 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
45 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
47 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
49 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
50 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
60 static char nib2b64[0x40+1] =
61 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
66 int output_message (CT, char *);
67 int output_message_fp (CT, FILE *, char *);
72 static int output_content (CT, FILE *);
73 static void output_headers (CT, FILE *);
74 static int writeExternalBody (CT, FILE *);
75 static int write8Bit (CT, FILE *);
76 static int writeQuoted (CT, FILE *);
77 static int writeBase64 (CT, FILE *);
81 * Main routine to output a MIME message contained
82 * in a Content structure, to a file. Any necessary
83 * transfer encoding is added.
87 output_message_fp (CT ct, FILE *fp, char *file)
89 if (output_content (ct, fp) == NOTOK)
93 advise ((file?file:"<FILE*>"), "error writing to");
100 output_message (CT ct, char *file)
105 if ((fp = fopen (file, "w")) == NULL) {
106 advise (file, "unable to open for writing");
109 status = output_message_fp(ct, fp, file);
116 * Output a Content structure to a file.
120 output_content (CT ct, FILE *out)
123 CI ci = &ct->c_ctinfo;
126 * Output all header fields for this content
128 output_headers (ct, out);
131 * If this is the internal content structure for a
132 * "message/external", then we are done with the
133 * headers (since it has no body).
139 * Now output the content bodies.
141 switch (ct->c_type) {
150 m = (struct multipart *) ct->c_ctparams;
151 for (part = m->mp_parts; part; part = part->mp_next) {
152 CT p = part->mp_part;
154 fprintf (out, "\n--%s\n", ci->ci_values[0]);
155 if (output_content (p, out) == NOTOK)
158 fprintf (out, "\n--%s--\n", ci->ci_values[0]);
164 if (ct->c_subtype == MESSAGE_EXTERNAL) {
167 e = (struct exbody *) ct->c_ctparams;
168 if (output_content (e->eb_content, out) == NOTOK)
171 /* output phantom body for access-type "mail-server" */
173 writeExternalBody (ct, out);
175 result = write8Bit (ct, out);
180 * Handle discrete types (text/application/audio/image/video)
183 switch (ct->c_encoding) {
186 result = write8Bit (ct, out);
191 result = write8Bit (ct, out);
196 result = writeQuoted (ct, out);
201 result = writeBase64 (ct, out);
205 advise (NULL, "can't handle binary transfer encoding in content");
210 advise (NULL, "unknown transfer encoding in content");
222 * Output all the header fields for a content
226 output_headers (CT ct, FILE *out)
232 fprintf (out, "%s:%s", hp->name, hp->value);
239 * Write the phantom body for access-type "mail-server".
243 writeExternalBody (CT ct, FILE *out)
245 char **ap, **ep, *cp;
246 struct exbody *e = (struct exbody *) ct->c_ctparams;
249 for (cp = e->eb_body; *cp; cp++) {
250 CT ct2 = e->eb_content;
251 CI ci2 = &ct2->c_ctinfo;
257 char *dp = trimcpy (ct2->c_id);
265 for (ap = ci2->ci_attrs, ep = ci2->ci_values; *ap; ap++, ep++)
266 if (!mh_strcasecmp (*ap, "name")) {
267 fprintf (out, "%s", *ep);
273 fprintf (out, "%s/%s", ci2->ci_type, ci2->ci_subtype);
274 for (ap = ci2->ci_attrs, ep = ci2->ci_values; *ap; ap++, ep++)
275 fprintf (out, "; %s=\"%s\"", *ap, *ep);
308 * Output a content without any transfer encoding
312 write8Bit (CT ct, FILE *out)
315 char c, *file, buffer[BUFSIZ];
316 CE ce = ct->c_cefile;
319 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
323 while (fgets (buffer, sizeof(buffer) - 1, ce->ce_fp)) {
324 c = buffer[strlen (buffer) - 1];
330 (*ct->c_ceclosefnx) (ct);
336 * Output a content using quoted-printable
340 writeQuoted (CT ct, FILE *out)
344 char c, buffer[BUFSIZ];
345 CE ce = ct->c_cefile;
348 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
351 while (fgets (buffer, sizeof(buffer) - 1, ce->ce_fp)) {
354 cp = buffer + strlen (buffer) - 1;
355 if ((c = *cp) == '\n')
358 if (strncmp (cp = buffer, "From ", sizeof("From ") - 1) == 0) {
359 fprintf (out, "=%02X", *cp++ & 0xff);
365 if (n > CPERLIN - 3) {
378 if (*cp < '!' || *cp > '~'
379 || (ebcdicsw && !ebcdicsafe[*cp & 0xff]))
387 fprintf (out, "=%02X", *cp & 0xff);
394 if (cp > buffer && (*--cp == ' ' || *cp == '\t'))
403 (*ct->c_ceclosefnx) (ct);
409 * Output a content using base64
413 writeBase64 (CT ct, FILE *out)
417 CE ce = ct->c_cefile;
420 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
423 result = writeBase64aux (ce->ce_fp, out);
424 (*ct->c_ceclosefnx) (ct);
430 writeBase64aux (FILE *in, FILE *out)
436 while ((cc = fread (inbuf, sizeof(*inbuf), sizeof(inbuf), in)) > 0) {
441 if (cc < sizeof(inbuf)) {
443 if (cc < sizeof(inbuf) - 1)
446 bits = (inbuf[0] & 0xff) << 16;
447 bits |= (inbuf[1] & 0xff) << 8;
448 bits |= inbuf[2] & 0xff;
450 for (bp = outbuf + sizeof(outbuf); bp > outbuf; bits >>= 6)
451 *--bp = nib2b64[bits & 0x3f];
452 if (cc < sizeof(inbuf)) {
454 if (cc < sizeof inbuf - 1)
458 fwrite (outbuf, sizeof(*outbuf), sizeof(outbuf), out);
460 if (cc < sizeof(inbuf)) {