input.c

   1 /*
   2  * Copyright 2004-2005 Timo Hirvonen
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17  * 02111-1307, USA.
  18  */
  19
  20 #include "input.h"
  21 #include "ip.h"
  22 #include "pcm.h"
  23 #include "http.h"
  24 #include "xmalloc.h"
  25 #include "file.h"
  26 #include "utils.h"
  27 #include "cmus.h"
  28 #include "list.h"
  29 #include "misc.h"
  30 #include "debug.h"
  31 #include "ui_curses.h"
  32 #include "config/libdir.h"
  33
  34 #include <unistd.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <stdarg.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <fcntl.h>
  41 #include <dirent.h>
  42 #include <dlfcn.h>
  43
  44 struct input_plugin {
  45         const struct input_plugin_ops *ops;
  46         struct input_plugin_data data;
  47         unsigned int open : 1;
  48         unsigned int eof : 1;
  49         int http_code;
  50         char *http_reason;
  51
  52         /* cached duration, -1 = unset */
  53         int duration;
  54
  55         /*
  56          * pcm is converted to 16-bit signed little-endian stereo
  57          * NOTE: no conversion is done if channels > 2 or bits > 16
  58          */
  59         void (*pcm_convert)(char *, const char *, int);
  60         void (*pcm_convert_in_place)(char *, int);
  61         /*
  62          * 4  if 8-bit mono
  63          * 2  if 8-bit stereo or 16-bit mono
  64          * 1  otherwise
  65          */
  66         int pcm_convert_scale;
  67 };
  68
  69 struct ip {
  70         struct list_head node;
  71         char *name;
  72         void *handle;
  73
  74         const char * const *extensions;
  75         const char * const *mime_types;
  76         const struct input_plugin_ops *ops;
  77 };
  78
  79 static const char * const plugin_dir = LIBDIR "/cmus/ip";
  80 static LIST_HEAD(ip_head);
  81
  82 /* timeouts (ms) */
  83 static int http_connection_timeout = 5e3;
  84 static int http_read_timeout = 5e3;
  85
  86 static const char *pl_mime_types[] = {
  87         "audio/m3u",
  88         "audio/x-scpls",
  89         "audio/x-mpegurl"
  90 };
  91
  92 static const char *get_extension(const char *filename)
  93 {
  94         const char *ext;
  95
  96         ext = filename + strlen(filename) - 1;
  97         while (ext >= filename && *ext != '/') {
  98                 if (*ext == '.') {
  99                         ext++;
 100                         return ext;
 101                 }
 102                 ext--;
 103         }
 104         return NULL;
 105 }
 106
 107 static const struct input_plugin_ops *get_ops_by_filename(const char *filename)
 108 {
 109         struct ip *ip;
 110         const char *ext;
 111
 112         ext = get_extension(filename);
 113         if (ext == NULL)
 114                 return NULL;
 115         list_for_each_entry(ip, &ip_head, node) {
 116                 const char * const *exts = ip->extensions;
 117                 int i;
 118
 119                 for (i = 0; exts[i]; i++) {
 120                         if (strcasecmp(ext, exts[i]) == 0)
 121                                 return ip->ops;
 122                 }
 123         }
 124         return NULL;
 125 }
 126
 127 static const struct input_plugin_ops *get_ops_by_mime_type(const char *mime_type)
 128 {
 129         struct ip *ip;
 130
 131         list_for_each_entry(ip, &ip_head, node) {
 132                 const char * const *types = ip->mime_types;
 133                 int i;
 134
 135                 for (i = 0; types[i]; i++) {
 136                         if (strcasecmp(mime_type, types[i]) == 0)
 137                                 return ip->ops;
 138                 }
 139         }
 140         return NULL;
 141 }
 142
 143 static int do_http_get(struct http_get *hg, const char *uri)
 144 {
 145         GROWING_KEYVALS(h);
 146         int i, rc;
 147         const char *val;
 148         char *redirloc;
 149
 150         d_print("%s\n", uri);
 151
 152         hg->headers = NULL;
 153         hg->reason = NULL;
 154         hg->code = -1;
 155         hg->fd = -1;
 156         if (http_parse_uri(uri, &hg->uri))
 157                 return -IP_ERROR_INVALID_URI;
 158
 159         if (http_open(hg, http_connection_timeout))
 160                 return -IP_ERROR_ERRNO;
 161
 162         keyvals_add(&h, "Host", xstrdup(hg->uri.host));
 163         keyvals_add(&h, "User-Agent", xstrdup("cmus/" VERSION));
 164         keyvals_add(&h, "Icy-MetaData", xstrdup("1"));
 165         if (hg->uri.user && hg->uri.pass) {
 166                 char buf[256];
 167                 char *encoded;
 168
 169                 snprintf(buf, sizeof(buf), "%s:%s", hg->uri.user, hg->uri.pass);
 170                 encoded = base64_encode(buf);
 171                 if (encoded == NULL) {
 172                         d_print("couldn't base64 encode '%s'\n", buf);
 173                 } else {
 174                         snprintf(buf, sizeof(buf), "Basic %s", encoded);
 175                         free(encoded);
 176                         keyvals_add(&h, "Authorization", xstrdup(buf));
 177                 }
 178         }
 179         keyvals_terminate(&h);
 180
 181         rc = http_get(hg, h.keyvals, http_read_timeout);
 182         keyvals_free(h.keyvals);
 183         switch (rc) {
 184         case -1:
 185                 return -IP_ERROR_ERRNO;
 186         case -2:
 187                 return -IP_ERROR_HTTP_RESPONSE;
 188         }
 189
 190         /*
 191          * FIXME: Use information from the headers, we read.
 192          *
 193          * especially interesting:
 194          *  + icy-name
 195          *  + icy-url
 196          */
 197         d_print("HTTP response: %d %s\n", hg->code, hg->reason);
 198         for (i = 0; hg->headers[i].key != NULL; i++)
 199                 d_print("  %s: %s\n", hg->headers[i].key, hg->headers[i].val);
 200
 201         switch (hg->code) {
 202         case 200: /* OK */
 203                 return 0;
 204         /*
 205          * 3xx Codes (Redirections)
 206          *     unhandled: 300 Multiple Choices
 207          */
 208         case 301: /* Moved Permanently */
 209         case 302: /* Found */
 210         case 303: /* See Other */
 211         case 307: /* Temporary Redirect */
 212                 val = keyvals_get_val(hg->headers, "location");
 213                 if (!val)
 214                         return -IP_ERROR_HTTP_RESPONSE;
 215                 redirloc = xstrdup(val);
 216                 http_get_free(hg);
 217                 close(hg->fd);
 218
 219                 rc = do_http_get(hg, redirloc);
 220                 free(redirloc);
 221                 return rc;
 222         default:
 223                 return -IP_ERROR_HTTP_STATUS;
 224         }
 225 }
 226
 227 static int setup_remote(struct input_plugin *ip, const struct keyval *headers, int sock)
 228 {
 229         const char *val;
 230
 231         val = keyvals_get_val(headers, "Content-Type");
 232         if (val) {
 233                 d_print("Content-Type: %s\n", val);
 234                 ip->ops = get_ops_by_mime_type(val);
 235                 if (ip->ops == NULL) {
 236                         d_print("unsupported content type: %s\n", val);
 237                         close(sock);
 238                         return -IP_ERROR_FILE_FORMAT;
 239                 }
 240         } else {
 241                 const char *type = "audio/mpeg";
 242
 243                 d_print("assuming %s content type\n", type);
 244                 ip->ops = get_ops_by_mime_type(type);
 245                 if (ip->ops == NULL) {
 246                         d_print("unsupported content type: %s\n", type);
 247                         close(sock);
 248                         return -IP_ERROR_FILE_FORMAT;
 249                 }
 250         }
 251
 252         ip->data.fd = sock;
 253         ip->data.metadata = xmalloc(16 * 255 + 1);
 254
 255         val = keyvals_get_val(headers, "icy-metaint");
 256         if (val) {
 257                 long int lint;
 258
 259                 if (str_to_int(val, &lint) == 0 && lint >= 0) {
 260                         ip->data.metaint = lint;
 261                         d_print("metaint: %d\n", ip->data.metaint);
 262                 }
 263         }
 264         return 0;
 265 }
 266
 267 struct read_playlist_data {
 268         struct input_plugin *ip;
 269         int rc;
 270         int count;
 271 };
 272
 273 static int handle_line(void *data, const char *uri)
 274 {
 275         struct read_playlist_data *rpd = data;
 276         struct http_get hg;
 277
 278         rpd->count++;
 279         rpd->rc = do_http_get(&hg, uri);
 280         if (rpd->rc) {
 281                 rpd->ip->http_code = hg.code;
 282                 rpd->ip->http_reason = hg.reason;
 283                 if (hg.fd >= 0)
 284                         close(hg.fd);
 285
 286                 hg.reason = NULL;
 287                 http_get_free(&hg);
 288                 return 0;
 289         }
 290
 291         rpd->rc = setup_remote(rpd->ip, hg.headers, hg.fd);
 292         http_get_free(&hg);
 293         return 1;
 294 }
 295
 296 static int read_playlist(struct input_plugin *ip, int sock)
 297 {
 298         struct read_playlist_data rpd = { ip, 0, 0 };
 299         char *body;
 300         int rc;
 301
 302         rc = http_read_body(sock, &body, http_read_timeout);
 303         close(sock);
 304         if (rc)
 305                 return -IP_ERROR_ERRNO;
 306
 307         cmus_playlist_for_each(body, strlen(body), 0, handle_line, &rpd);
 308         free(body);
 309         if (!rpd.count) {
 310                 d_print("empty playlist\n");
 311                 rpd.rc = -IP_ERROR_HTTP_RESPONSE;
 312         }
 313         return rpd.rc;
 314 }
 315
 316 static int open_remote(struct input_plugin *ip)
 317 {
 318         struct input_plugin_data *d = &ip->data;
 319         struct http_get hg;
 320         const char *val;
 321         int rc;
 322
 323         rc = do_http_get(&hg, d->filename);
 324         if (rc) {
 325                 ip->http_code = hg.code;
 326                 ip->http_reason = hg.reason;
 327                 hg.reason = NULL;
 328                 http_get_free(&hg);
 329                 return rc;
 330         }
 331
 332         val = keyvals_get_val(hg.headers, "Content-Type");
 333         if (val) {
 334                 int i;
 335
 336                 for (i = 0; i < sizeof(pl_mime_types) / sizeof(pl_mime_types[0]); i++) {
 337                         if (!strcasecmp(val, pl_mime_types[i])) {
 338                                 d_print("Content-Type: %s\n", val);
 339                                 http_get_free(&hg);
 340                                 return read_playlist(ip, hg.fd);
 341                         }
 342                 }
 343         }
 344
 345         rc = setup_remote(ip, hg.headers, hg.fd);
 346         http_get_free(&hg);
 347         return rc;
 348 }
 349
 350 static int open_file(struct input_plugin *ip)
 351 {
 352         ip->ops = get_ops_by_filename(ip->data.filename);
 353         if (ip->ops == NULL)
 354                 return -IP_ERROR_UNRECOGNIZED_FILE_TYPE;
 355         ip->data.fd = open(ip->data.filename, O_RDONLY);
 356         if (ip->data.fd == -1) {
 357                 ip->ops = NULL;
 358                 return -IP_ERROR_ERRNO;
 359         }
 360         return 0;
 361 }
 362
 363 void ip_load_plugins(void)
 364 {
 365         DIR *dir;
 366         struct dirent *d;
 367
 368         dir = opendir(plugin_dir);
 369         if (dir == NULL) {
 370                 error_msg("couldn't open directory `%s': %s", plugin_dir, strerror(errno));
 371                 return;
 372         }
 373         while ((d = readdir(dir)) != NULL) {
 374                 char filename[256];
 375                 struct ip *ip;
 376                 void *so;
 377                 char *ext;
 378                 const char *sym;
 379
 380                 if (d->d_name[0] == '.')
 381                         continue;
 382                 ext = strrchr(d->d_name, '.');
 383                 if (ext == NULL)
 384                         continue;
 385                 if (strcmp(ext, ".so"))
 386                         continue;
 387
 388                 snprintf(filename, sizeof(filename), "%s/%s", plugin_dir, d->d_name);
 389
 390                 so = dlopen(filename, RTLD_NOW);
 391                 if (so == NULL) {
 392                         error_msg("%s", dlerror());
 393                         continue;
 394                 }
 395
 396                 ip = xnew(struct ip, 1);
 397
 398                 sym = "ip_extensions";
 399                 if (!(ip->extensions = dlsym(so, sym)))
 400                         goto sym_err;
 401
 402                 sym = "ip_mime_types";
 403                 if (!(ip->mime_types = dlsym(so, sym)))
 404                         goto sym_err;
 405
 406                 sym = "ip_ops";
 407                 if (!(ip->ops = dlsym(so, sym)))
 408                         goto sym_err;
 409
 410                 ip->name = xstrndup(d->d_name, ext - d->d_name);
 411                 ip->handle = so;
 412
 413                 list_add_tail(&ip->node, &ip_head);
 414                 continue;
 415 sym_err:
 416                 error_msg("%s: symbol %s not found", filename, sym);
 417                 free(ip);
 418                 dlclose(so);
 419         }
 420         closedir(dir);
 421 }
 422
 423 static void ip_init(struct input_plugin *ip, char *filename)
 424 {
 425         memset(ip, 0, sizeof(*ip));
 426         ip->http_code = -1;
 427         ip->pcm_convert_scale = -1;
 428         ip->duration = -1;
 429         ip->data.fd = -1;
 430         ip->data.filename = filename;
 431         ip->data.remote = is_url(filename);
 432 }
 433
 434 struct input_plugin *ip_new(const char *filename)
 435 {
 436         struct input_plugin *ip = xnew(struct input_plugin, 1);
 437
 438         ip_init(ip, xstrdup(filename));
 439         return ip;
 440 }
 441
 442 void ip_delete(struct input_plugin *ip)
 443 {
 444         if (ip->open)
 445                 ip_close(ip);
 446         free(ip->data.filename);
 447         free(ip);
 448 }
 449
 450 int ip_open(struct input_plugin *ip)
 451 {
 452         int rc;
 453
 454         BUG_ON(ip->open);
 455
 456         /* set fd and ops */
 457         if (ip->data.remote) {
 458                 rc = open_remote(ip);
 459         } else {
 460                 rc = open_file(ip);
 461         }
 462
 463         if (rc) {
 464                 d_print("opening `%s' failed: %d %s\n", ip->data.filename, rc,
 465                                 rc == -1 ? strerror(errno) : "");
 466                 return rc;
 467         }
 468
 469         rc = ip->ops->open(&ip->data);
 470         if (rc) {
 471                 d_print("opening file `%s' failed: %d %s\n", ip->data.filename, rc,
 472                                 rc == -1 ? strerror(errno) : "");
 473                 if (ip->data.fd != -1)
 474                         close(ip->data.fd);
 475                 free(ip->data.metadata);
 476                 ip_init(ip, ip->data.filename);
 477                 return rc;
 478         }
 479         ip->open = 1;
 480         return 0;
 481 }
 482
 483 void ip_setup(struct input_plugin *ip)
 484 {
 485         unsigned int bits, is_signed, channels;
 486         sample_format_t sf = ip->data.sf;
 487
 488         bits = sf_get_bits(sf);
 489         is_signed = sf_get_signed(sf);
 490         channels = sf_get_channels(sf);
 491
 492         ip->pcm_convert_scale = 1;
 493         ip->pcm_convert = NULL;
 494         ip->pcm_convert_in_place = NULL;
 495
 496         if (bits <= 16 && channels <= 2) {
 497                 unsigned int mask = ((bits >> 2) & 4) | (is_signed << 1);
 498
 499                 ip->pcm_convert = pcm_conv[mask | (channels - 1)];
 500                 ip->pcm_convert_in_place = pcm_conv_in_place[mask | sf_get_bigendian(sf)];
 501
 502                 ip->pcm_convert_scale = (3 - channels) * (3 - bits / 8);
 503         }
 504
 505         d_print("pcm convert: scale=%d convert=%d convert_in_place=%d\n",
 506                         ip->pcm_convert_scale,
 507                         ip->pcm_convert != NULL,
 508                         ip->pcm_convert_in_place != NULL);
 509 }
 510
 511 int ip_close(struct input_plugin *ip)
 512 {
 513         int rc;
 514
 515         rc = ip->ops->close(&ip->data);
 516         BUG_ON(ip->data.private);
 517         if (ip->data.fd != -1)
 518                 close(ip->data.fd);
 519         free(ip->data.metadata);
 520         free(ip->http_reason);
 521
 522         ip_init(ip, ip->data.filename);
 523         return rc;
 524 }
 525
 526 int ip_read(struct input_plugin *ip, char *buffer, int count)
 527 {
 528         struct timeval tv;
 529         fd_set readfds;
 530         /* 4608 seems to be optimal for mp3s, 4096 for oggs */
 531         char tmp[8 * 1024];
 532         char *buf;
 533         int sample_size;
 534         int rc;
 535
 536         BUG_ON(count <= 0);
 537
 538         FD_ZERO(&readfds);
 539         FD_SET(ip->data.fd, &readfds);
 540         /* zero timeout -> return immediately */
 541         tv.tv_sec = 0;
 542         tv.tv_usec = 50e3;
 543         rc = select(ip->data.fd + 1, &readfds, NULL, NULL, &tv);
 544         if (rc == -1) {
 545                 if (errno == EINTR)
 546                         errno = EAGAIN;
 547                 return -1;
 548         }
 549         if (rc == 0) {
 550                 errno = EAGAIN;
 551                 return -1;
 552         }
 553
 554         buf = buffer;
 555         if (ip->pcm_convert_scale > 1) {
 556                 /* use tmp buffer for 16-bit mono and 8-bit */
 557                 buf = tmp;
 558                 count /= ip->pcm_convert_scale;
 559                 if (count > sizeof(tmp))
 560                         count = sizeof(tmp);
 561         }
 562
 563         rc = ip->ops->read(&ip->data, buf, count);
 564         if (rc == -1 && (errno == EAGAIN || errno == EINTR)) {
 565                 errno = EAGAIN;
 566                 return -1;
 567         }
 568         if (rc <= 0) {
 569                 ip->eof = 1;
 570                 return rc;
 571         }
 572
 573         BUG_ON((rc & ~((unsigned int)sf_get_frame_size(ip->data.sf) - 1U)) != rc);
 574
 575         sample_size = sf_get_sample_size(ip->data.sf);
 576         if (ip->pcm_convert_in_place != NULL)
 577                 ip->pcm_convert_in_place(buf, rc / sample_size);
 578         if (ip->pcm_convert != NULL)
 579                 ip->pcm_convert(buffer, tmp, rc / sample_size);
 580         return rc * ip->pcm_convert_scale;
 581 }
 582
 583 int ip_seek(struct input_plugin *ip, double offset)
 584 {
 585         int rc;
 586
 587         if (ip->data.remote)
 588                 return -IP_ERROR_FUNCTION_NOT_SUPPORTED;
 589         rc = ip->ops->seek(&ip->data, offset);
 590         if (rc == 0)
 591                 ip->eof = 0;
 592         return rc;
 593 }
 594
 595 int ip_read_comments(struct input_plugin *ip, struct keyval **comments)
 596 {
 597         return ip->ops->read_comments(&ip->data, comments);
 598 }
 599
 600 int ip_duration(struct input_plugin *ip)
 601 {
 602         if (ip->data.remote)
 603                 return -1;
 604         if (ip->duration == -1)
 605                 ip->duration = ip->ops->duration(&ip->data);
 606         if (ip->duration < 0)
 607                 return -1;
 608         return ip->duration;
 609 }
 610
 611 sample_format_t ip_get_sf(struct input_plugin *ip)
 612 {
 613         BUG_ON(!ip->open);
 614         return ip->data.sf;
 615 }
 616
 617 const char *ip_get_filename(struct input_plugin *ip)
 618 {
 619         return ip->data.filename;
 620 }
 621
 622 const char *ip_get_metadata(struct input_plugin *ip)
 623 {
 624         BUG_ON(!ip->open);
 625         return ip->data.metadata;
 626 }
 627
 628 int ip_is_remote(struct input_plugin *ip)
 629 {
 630         return ip->data.remote;
 631 }
 632
 633 int ip_metadata_changed(struct input_plugin *ip)
 634 {
 635         int ret = ip->data.metadata_changed;
 636
 637         BUG_ON(!ip->open);
 638         ip->data.metadata_changed = 0;
 639         return ret;
 640 }
 641
 642 int ip_eof(struct input_plugin *ip)
 643 {
 644         BUG_ON(!ip->open);
 645         return ip->eof;
 646 }
 647
 648 char *ip_get_error_msg(struct input_plugin *ip, int rc, const char *arg)
 649 {
 650         char buffer[1024];
 651
 652         switch (-rc) {
 653         case IP_ERROR_ERRNO:
 654                 snprintf(buffer, sizeof(buffer), "%s: %s", arg, strerror(errno));
 655                 break;
 656         case IP_ERROR_UNRECOGNIZED_FILE_TYPE:
 657                 snprintf(buffer, sizeof(buffer),
 658                                 "%s: unrecognized filename extension", arg);
 659                 break;
 660         case IP_ERROR_FUNCTION_NOT_SUPPORTED:
 661                 snprintf(buffer, sizeof(buffer),
 662                                 "%s: function not supported", arg);
 663                 break;
 664         case IP_ERROR_FILE_FORMAT:
 665                 snprintf(buffer, sizeof(buffer),
 666                                 "%s: file format not supported or corrupted file",
 667                                 arg);
 668                 break;
 669         case IP_ERROR_INVALID_URI:
 670                 snprintf(buffer, sizeof(buffer), "%s: invalid URI", arg);
 671                 break;
 672         case IP_ERROR_SAMPLE_FORMAT:
 673                 snprintf(buffer, sizeof(buffer),
 674                                 "%s: input plugin doesn't support the sample format",
 675                                 arg);
 676                 break;
 677         case IP_ERROR_HTTP_RESPONSE:
 678                 snprintf(buffer, sizeof(buffer), "%s: invalid HTTP response", arg);
 679                 break;
 680         case IP_ERROR_HTTP_STATUS:
 681                 snprintf(buffer, sizeof(buffer), "%s: %d %s", arg, ip->http_code, ip->http_reason);
 682                 free(ip->http_reason);
 683                 ip->http_reason = NULL;
 684                 ip->http_code = -1;
 685                 break;
 686         case IP_ERROR_INTERNAL:
 687                 snprintf(buffer, sizeof(buffer), "%s: internal error", arg);
 688                 break;
 689         case IP_ERROR_SUCCESS:
 690         default:
 691                 snprintf(buffer, sizeof(buffer),
 692                                 "%s: this is not an error (%d), this is a bug",
 693                                 arg, rc);
 694                 break;
 695         }
 696         return xstrdup(buffer);
 697 }
 698
 699 char **ip_get_supported_extensions(void)
 700 {
 701         struct ip *ip;
 702         char **exts;
 703         int i, size;
 704         int count = 0;
 705
 706         size = 8;
 707         exts = xnew(char *, size);
 708         list_for_each_entry(ip, &ip_head, node) {
 709                 const char * const *e = ip->extensions;
 710
 711                 for (i = 0; e[i]; i++) {
 712                         if (count == size - 1) {
 713                                 size *= 2;
 714                                 exts = xrenew(char *, exts, size);
 715                         }
 716                         exts[count++] = xstrdup(e[i]);
 717                 }
 718         }
 719         exts[count] = NULL;
 720         qsort(exts, count, sizeof(char *), strptrcmp);
 721         return exts;
 722 }
 723
 724 void ip_dump_plugins(void)
 725 {
 726         struct ip *ip;
 727         int i;
 728
 729         printf("Input Plugins: %s\n", plugin_dir);
 730         list_for_each_entry(ip, &ip_head, node) {
 731                 printf("  %s:\n    File Types:", ip->name);
 732                 for (i = 0; ip->extensions[i]; i++)
 733                         printf(" %s", ip->extensions[i]);
 734                 printf("\n    MIME Types:");
 735                 for (i = 0; ip->mime_types[i]; i++)
 736                         printf(" %s", ip->mime_types[i]);
 737                 printf("\n");
 738         }
 739 }