2 * This file is part of DisOrder
3 * Copyright (C) 2005 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
35 static int whitespace(int c) {
47 static int tspecial(int c) {
70 static const char *skipwhite(const char *s) {
87 case '(': ++depth; break;
88 case ')': --depth; break;
103 static const char *parsestring(const char *s, char **valuep) {
109 while((c = *s++) != '"') {
112 if(!(c = *s++)) return 0;
114 dynstr_append(&value, c);
119 dynstr_terminate(&value);
124 int mime_content_type(const char *s,
126 char **parameternamep,
127 char **parametervaluep) {
128 struct dynstr type, parametername, parametervalue;
131 if(!(s = skipwhite(s))) return -1;
133 while(*s && !tspecial(*s) && !whitespace(*s))
134 dynstr_append(&type, tolower((unsigned char)*s++));
135 if(!(s = skipwhite(s))) return -1;
136 if(*s++ != '/') return -1;
137 dynstr_append(&type, '/');
138 if(!(s = skipwhite(s))) return -1;
139 while(*s && !tspecial(*s) && !whitespace(*s))
140 dynstr_append(&type, tolower((unsigned char)*s++));
141 if(!(s = skipwhite(s))) return -1;
144 dynstr_init(¶metername);
146 if(!(s = skipwhite(s))) return -1;
148 while(*s && !tspecial(*s) && !whitespace(*s))
149 dynstr_append(¶metername, tolower((unsigned char)*s++));
150 if(!(s = skipwhite(s))) return -1;
151 if(*s++ != '=') return -1;
152 if(!(s = skipwhite(s))) return -1;
154 if(!(s = parsestring(s, parametervaluep))) return -1;
156 dynstr_init(¶metervalue);
157 while(*s && !tspecial(*s) && !whitespace(*s))
158 dynstr_append(¶metervalue, *s++);
159 dynstr_terminate(¶metervalue);
160 *parametervaluep = parametervalue.vec;
162 if(!(s = skipwhite(s))) return -1;
163 dynstr_terminate(¶metername);
164 *parameternamep = parametername.vec;
166 *parametervaluep = *parameternamep = 0;
167 dynstr_terminate(&type);
172 static int iscrlf(const char *ptr) {
173 return ptr[0] == '\r' && ptr[1] == '\n';
176 const char *mime_parse(const char *s,
177 int (*callback)(const char *name, const char *value,
180 struct dynstr name, value;
183 while(*s && !iscrlf(s)) {
186 while(*s && !tspecial(*s) && !whitespace(*s))
187 dynstr_append(&name, tolower((unsigned char)*s++));
188 if(!(s = skipwhite(s))) return 0;
189 if(*s != ':') return 0;
191 while(*s && !(*s == '\n' && !(s[1] == ' ' || s[1] == '\t')))
192 dynstr_append(&value, *s++);
194 dynstr_terminate(&name);
195 dynstr_terminate(&value);
196 if(!strcmp(name.vec, "content-transfer-encoding")) {
197 cte = xstrdup(value.vec);
198 for(p = cte; *p; p++)
199 *p = tolower((unsigned char)*p);
201 if(callback(name.vec, value.vec, u)) return 0;
205 if(!strcmp(cte, "base64")) return mime_base64(s);
206 if(!strcmp(cte, "quoted-printable")) return mime_qp(s);
211 static int isboundary(const char *ptr, const char *boundary, size_t bl) {
212 return (ptr[0] == '-'
214 && !strncmp(ptr + 2, boundary, bl)
215 && (iscrlf(ptr + bl + 2)
216 || (ptr[bl + 2] == '-'
217 && ptr[bl + 3] == '-'
218 && (iscrlf(ptr + bl + 4) || *(ptr + bl + 4) == 0))));
221 static int isfinal(const char *ptr, const char *boundary, size_t bl) {
222 return (ptr[0] == '-'
224 && !strncmp(ptr + 2, boundary, bl)
225 && ptr[bl + 2] == '-'
226 && ptr[bl + 3] == '-'
227 && (iscrlf(ptr + bl + 4) || *(ptr + bl + 4) == 0));
230 int mime_multipart(const char *s,
231 int (*callback)(const char *s, void *u),
232 const char *boundary,
234 size_t bl = strlen(boundary);
235 const char *start, *e;
238 /* We must start with a boundary string */
239 if(!isboundary(s, boundary, bl))
241 /* Keep going until we hit a final boundary */
242 while(!isfinal(s, boundary, bl)) {
243 s = strstr(s, "\r\n") + 2;
245 while(!isboundary(s, boundary, bl)) {
246 if(!(e = strstr(s, "\r\n")))
250 if((ret = callback(xstrndup(start,
251 s == start ? 0 : s - start - 2),
258 int mime_rfc2388_content_disposition(const char *s,
260 char **parameternamep,
261 char **parametervaluep) {
262 struct dynstr disposition, parametername, parametervalue;
264 dynstr_init(&disposition);
265 if(!(s = skipwhite(s))) return -1;
267 while(*s && !tspecial(*s) && !whitespace(*s))
268 dynstr_append(&disposition, tolower((unsigned char)*s++));
269 if(!(s = skipwhite(s))) return -1;
272 dynstr_init(¶metername);
274 if(!(s = skipwhite(s))) return -1;
276 while(*s && !tspecial(*s) && !whitespace(*s))
277 dynstr_append(¶metername, tolower((unsigned char)*s++));
278 if(!(s = skipwhite(s))) return -1;
279 if(*s++ != '=') return -1;
280 if(!(s = skipwhite(s))) return -1;
282 if(!(s = parsestring(s, parametervaluep))) return -1;
284 dynstr_init(¶metervalue);
285 while(*s && !tspecial(*s) && !whitespace(*s))
286 dynstr_append(¶metervalue, *s++);
287 dynstr_terminate(¶metervalue);
288 *parametervaluep = parametervalue.vec;
290 if(!(s = skipwhite(s))) return -1;
291 dynstr_terminate(¶metername);
292 *parameternamep = parametername.vec;
294 *parametervaluep = *parameternamep = 0;
295 dynstr_terminate(&disposition);
296 *dispositionp = disposition.vec;
300 char *mime_qp(const char *s) {
309 if((a = unhexdigitq(s[0])) != -1
310 && (b = unhexdigitq(s[1])) != -1) {
311 dynstr_append(&d, a * 16 + b);
315 while(*t == ' ' || *t == '\t') ++t;
317 /* soft line break */
326 while(*t == ' ' || *t == '\t') ++t;
328 /* trailing space is always eliminated */
331 dynstr_append(&d, c);
334 dynstr_append(&d, c);
338 dynstr_terminate(&d);
342 char *mime_base64(const char *s) {
346 static const char table[] =
347 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
351 while((c = (unsigned char)*s++)) {
352 if((t = strchr(table, c))) {
355 dynstr_append(&d, (b[0] << 2) + (b[1] >> 4));
356 dynstr_append(&d, (b[1] << 4) + (b[2] >> 2));
357 dynstr_append(&d, (b[2] << 6) + b[3]);
360 } else if(c == '=') {
362 dynstr_append(&d, (b[0] << 2) + (b[1] >> 4));
364 dynstr_append(&d, (b[1] << 4) + (b[2] >> 2));
369 dynstr_terminate(&d);