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
33 static int whitespace(int c) {
45 static int tspecial(int c) {
68 static const char *skipwhite(const char *s) {
85 case '(': ++depth; break;
86 case ')': --depth; break;
101 static const char *parsestring(const char *s, char **valuep) {
107 while((c = *s++) != '"') {
110 if(!(c = *s++)) return 0;
112 dynstr_append(&value, c);
117 dynstr_terminate(&value);
122 int mime_content_type(const char *s,
124 char **parameternamep,
125 char **parametervaluep) {
126 struct dynstr type, parametername, parametervalue;
129 if(!(s = skipwhite(s))) return -1;
131 while(*s && !tspecial(*s) && !whitespace(*s))
132 dynstr_append(&type, tolower((unsigned char)*s++));
133 if(!(s = skipwhite(s))) return -1;
134 if(*s++ != '/') return -1;
135 dynstr_append(&type, '/');
136 if(!(s = skipwhite(s))) return -1;
137 while(*s && !tspecial(*s) && !whitespace(*s))
138 dynstr_append(&type, tolower((unsigned char)*s++));
139 if(!(s = skipwhite(s))) return -1;
142 dynstr_init(¶metername);
144 if(!(s = skipwhite(s))) return -1;
146 while(*s && !tspecial(*s) && !whitespace(*s))
147 dynstr_append(¶metername, tolower((unsigned char)*s++));
148 if(!(s = skipwhite(s))) return -1;
149 if(*s++ != '=') return -1;
150 if(!(s = skipwhite(s))) return -1;
152 if(!(s = parsestring(s, parametervaluep))) return -1;
154 dynstr_init(¶metervalue);
155 while(*s && !tspecial(*s) && !whitespace(*s))
156 dynstr_append(¶metervalue, *s++);
157 dynstr_terminate(¶metervalue);
158 *parametervaluep = parametervalue.vec;
160 if(!(s = skipwhite(s))) return -1;
161 dynstr_terminate(¶metername);
162 *parameternamep = parametername.vec;
164 *parametervaluep = *parameternamep = 0;
165 dynstr_terminate(&type);
170 static int iscrlf(const char *ptr) {
171 return ptr[0] == '\r' && ptr[1] == '\n';
174 const char *mime_parse(const char *s,
175 int (*callback)(const char *name, const char *value,
178 struct dynstr name, value;
181 while(*s && !iscrlf(s)) {
184 while(*s && !tspecial(*s) && !whitespace(*s))
185 dynstr_append(&name, tolower((unsigned char)*s++));
186 if(!(s = skipwhite(s))) return 0;
187 if(*s != ':') return 0;
189 while(*s && !(*s == '\n' && !(s[1] == ' ' || s[1] == '\t')))
190 dynstr_append(&value, *s++);
192 dynstr_terminate(&name);
193 dynstr_terminate(&value);
194 if(!strcmp(name.vec, "content-transfer-encoding")) {
195 cte = xstrdup(value.vec);
196 for(p = cte; *p; p++)
197 *p = tolower((unsigned char)*p);
199 if(callback(name.vec, value.vec, u)) return 0;
203 if(!strcmp(cte, "base64")) return mime_base64(s);
204 if(!strcmp(cte, "quoted-printable")) return mime_qp(s);
209 static int isboundary(const char *ptr, const char *boundary, size_t bl) {
210 return (ptr[0] == '-'
212 && !strncmp(ptr + 2, boundary, bl)
213 && (iscrlf(ptr + bl + 2)
214 || (ptr[bl + 2] == '-'
215 && ptr[bl + 3] == '-'
216 && iscrlf(ptr + bl + 4))));
219 static int isfinal(const char *ptr, const char *boundary, size_t bl) {
220 return (ptr[0] == '-'
222 && !strncmp(ptr + 2, boundary, bl)
223 && ptr[bl + 2] == '-'
224 && ptr[bl + 3] == '-'
225 && iscrlf(ptr + bl + 4));
228 int mime_multipart(const char *s,
229 int (*callback)(const char *s, void *u),
230 const char *boundary,
232 size_t bl = strlen(boundary);
233 const char *start, *e;
236 if(!isboundary(s, boundary, bl)) return -1;
237 while(!isfinal(s, boundary, bl)) {
238 s = strstr(s, "\r\n") + 2;
240 while(!isboundary(s, boundary, bl)) {
241 if(!(e = strstr(s, "\r\n"))) return -1;
244 if((ret = callback(xstrndup(start,
245 s == start ? 0 : s - start - 2),
252 int mime_rfc2388_content_disposition(const char *s,
254 char **parameternamep,
255 char **parametervaluep) {
256 struct dynstr disposition, parametername, parametervalue;
258 dynstr_init(&disposition);
259 if(!(s = skipwhite(s))) return -1;
261 while(*s && !tspecial(*s) && !whitespace(*s))
262 dynstr_append(&disposition, tolower((unsigned char)*s++));
263 if(!(s = skipwhite(s))) return -1;
266 dynstr_init(¶metername);
268 if(!(s = skipwhite(s))) return -1;
270 while(*s && !tspecial(*s) && !whitespace(*s))
271 dynstr_append(¶metername, tolower((unsigned char)*s++));
272 if(!(s = skipwhite(s))) return -1;
273 if(*s++ != '=') return -1;
274 if(!(s = skipwhite(s))) return -1;
276 if(!(s = parsestring(s, parametervaluep))) return -1;
278 dynstr_init(¶metervalue);
279 while(*s && !tspecial(*s) && !whitespace(*s))
280 dynstr_append(¶metervalue, *s++);
281 dynstr_terminate(¶metervalue);
282 *parametervaluep = parametervalue.vec;
284 if(!(s = skipwhite(s))) return -1;
285 dynstr_terminate(¶metername);
286 *parameternamep = parametername.vec;
288 *parametervaluep = *parameternamep = 0;
289 dynstr_terminate(&disposition);
290 *dispositionp = disposition.vec;
294 char *mime_qp(const char *s) {
303 if((a = unhexdigitq(s[0])) != -1
304 && (b = unhexdigitq(s[1])) != -1) {
305 dynstr_append(&d, a * 16 + b);
309 while(*t == ' ' || *t == '\t') ++t;
311 /* soft line break */
320 while(*t == ' ' || *t == '\t') ++t;
322 /* trailing space is always eliminated */
325 dynstr_append(&d, c);
328 dynstr_append(&d, c);
332 dynstr_terminate(&d);
336 char *mime_base64(const char *s) {
340 static const char table[] =
341 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
345 while((c = (unsigned char)*s++)) {
346 if((t = strchr(table, c))) {
349 dynstr_append(&d, (b[0] << 2) + (b[1] >> 4));
350 dynstr_append(&d, (b[1] << 4) + (b[2] >> 2));
351 dynstr_append(&d, (b[2] << 6) + b[3]);
354 } else if(c == '=') {
356 dynstr_append(&d, (b[0] << 2) + (b[1] >> 4));
358 dynstr_append(&d, (b[1] << 4) + (b[2] >> 2));
363 dynstr_terminate(&d);