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* Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#include "gmid.h"
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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init_mime(struct mime *mime)
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mime->len = 0;
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mime->cap = 16;
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mime->t = calloc(mime->cap, sizeof(struct etm));
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if (mime->t == NULL)
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fatal("calloc: %s", strerror(errno));
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/* register mime for the given extension */
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add_mime(struct mime *mime, const char *mt, const char *ext)
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char *mimetype, *extension;
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struct etm *t;
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size_t newcap;
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if (mime->len == mime->cap) {
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newcap = mime->cap * 1.5;
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t = recallocarray(mime->t, mime->cap, newcap,
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sizeof(struct etm));
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if (t == NULL)
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return -1;
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mime->t = t;
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mime->cap = newcap;
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if ((mimetype = strdup(mt)) == NULL)
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return -1;
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if ((extension = strdup(ext)) == NULL) {
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free(mimetype);
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return -1;
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mime->t[mime->len].mime = mimetype;
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mime->t[mime->len].ext = extension;
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mime->len++;
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return 0;
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/* load a default set of common mime-extension associations */
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load_default_mime(struct mime *mime)
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const struct mapping {
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const char *mime;
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const char *ext;
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} m[] = {
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{"application/pdf", "pdf"},
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{"image/gif", "gif"},
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{"image/jpeg", "jpg"},
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{"image/jpeg", "jpeg"},
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{"image/png", "png"},
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{"image/svg+xml", "svg"},
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{"text/gemini", "gemini"},
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{"text/gemini", "gmi"},
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{"text/markdown", "markdown"},
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{"text/markdown", "md"},
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{"text/plain", "txt"},
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{"text/x-patch", "diff"},
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{"text/x-patch", "patch"},
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{"text/xml", "xml"},
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{NULL, NULL}
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for (i = m; i->mime != NULL; ++i) {
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if (add_mime(mime, i->mime, i->ext) == -1)
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return -1;
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return 0;
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static const char *
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path_ext(const char *path)
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const char *end;
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end = path + strlen(path)-1;
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for (; end != path; --end) {
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if (*end == '.')
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return end+1;
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if (*end == '/')
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return NULL;
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static int
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mime_comp(const void *a, const void *b)
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const struct etm *x = a, *y = b;
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return strcmp(x->ext, y->ext);
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sort_mime(struct mime *m)
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qsort(m->t, m->len, sizeof(*m->t), mime_comp);
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static int
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mime_find(const void *a, const void *b)
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const char *ext = a;
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const struct etm *x = b;
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return strcmp(ext, x->ext);
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const char *
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mime(struct vhost *host, const char *path)
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const char *def, *ext;
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struct etm *t;
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def = vhost_default_mime(host, path);
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if ((ext = path_ext(path)) == NULL)
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return def;
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t = bsearch(ext, conf.mime.t, conf.mime.len, sizeof(*conf.mime.t),
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mime_find);
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if (t != NULL)
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return t->mime;
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if (!strcmp(ext, "gmi") || !strcmp(ext, "gemini"))
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return "text/gemini";
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return def;
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free_mime(struct mime *m)
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struct etm *t;
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for (t = m->t; t->mime != NULL; ++t) {
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free(t->mime);
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free(t->ext);
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free(m->t);
