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mimemap.c
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/
mimemap.c
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/*
* Copyright (c) 2014 DeNA Co., Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <string.h>
#include "khash.h"
#include "h2o.h"
KHASH_MAP_INIT_STR(extmap, h2o_mimemap_type_t *)
static inline khint_t hash_mimemap_type(h2o_mimemap_type_t *mimetype)
{
khint_t h = 0;
size_t i;
for (i = 0; i != mimetype->data.mimetype.len; ++i)
h = (h << 5) - h + (khint_t)mimetype->data.mimetype.base[i];
return h;
}
static inline int mimemap_type_equals(h2o_mimemap_type_t *x, h2o_mimemap_type_t *y)
{
return h2o_memis(x->data.mimetype.base, x->data.mimetype.len, y->data.mimetype.base, y->data.mimetype.len);
}
KHASH_INIT(typeset, h2o_mimemap_type_t *, char, 0, hash_mimemap_type, mimemap_type_equals)
h2o_mime_attributes_t h2o_mime_attributes_as_is = {};
struct st_h2o_mimemap_t {
khash_t(extmap) * extmap;
khash_t(typeset) * typeset; /* refs point to the entries in extmap */
h2o_mimemap_type_t *default_type;
size_t num_dynamic;
};
static h2o_iovec_t dupref(const char *s)
{
h2o_iovec_t ret;
ret.len = strlen(s);
ret.base = h2o_mem_alloc_shared(NULL, ret.len + 1, NULL);
memcpy(ret.base, s, ret.len + 1);
return ret;
}
static void on_dispose(void *_mimemap)
{
h2o_mimemap_t *mimemap = _mimemap;
const char *ext;
h2o_mimemap_type_t *type;
kh_destroy(typeset, mimemap->typeset);
kh_foreach(mimemap->extmap, ext, type, {
h2o_mem_release_shared((char *)ext);
h2o_mem_release_shared(type);
});
kh_destroy(extmap, mimemap->extmap);
h2o_mem_release_shared(mimemap->default_type);
}
static void on_unlink(h2o_mimemap_t *mimemap, h2o_mimemap_type_t *type)
{
switch (type->type) {
case H2O_MIMEMAP_TYPE_MIMETYPE:
break;
case H2O_MIMEMAP_TYPE_DYNAMIC:
--mimemap->num_dynamic;
break;
}
}
static void on_link(h2o_mimemap_t *mimemap, h2o_mimemap_type_t *type)
{
switch (type->type) {
case H2O_MIMEMAP_TYPE_MIMETYPE:
break;
case H2O_MIMEMAP_TYPE_DYNAMIC:
++mimemap->num_dynamic;
break;
}
}
static void rebuild_typeset(h2o_mimemap_t *mimemap)
{
kh_clear(typeset, mimemap->typeset);
const char *ext;
h2o_mimemap_type_t *mime;
kh_foreach(mimemap->extmap, ext, mime, {
if (mime->type == H2O_MIMEMAP_TYPE_MIMETYPE) {
khiter_t iter = kh_get(typeset, mimemap->typeset, mime);
if (iter == kh_end(mimemap->typeset)) {
int r;
kh_put(typeset, mimemap->typeset, mime, &r);
}
}
});
}
static h2o_mimemap_type_t *create_extension_type(const char *mime)
{
h2o_mimemap_type_t *type = h2o_mem_alloc_shared(NULL, sizeof(*type) + strlen(mime) + 1, NULL);
size_t i, type_end_at;
memset(type, 0, sizeof(*type));
type->type = H2O_MIMEMAP_TYPE_MIMETYPE;
/* normalize-copy type->data.mimetype */
type->data.mimetype.base = (char *)type + sizeof(*type);
for (i = 0; mime[i] != '\0' && mime[i] != ';'; ++i)
type->data.mimetype.base[i] = h2o_tolower(mime[i]);
type_end_at = i;
for (; mime[i] != '\0'; ++i)
type->data.mimetype.base[i] = mime[i];
type->data.mimetype.base[i] = '\0';
type->data.mimetype.len = i;
/* make a rough guess on whether the type is compressible or not */
if (strncmp(type->data.mimetype.base, "text/", 5) == 0 ||
h2o_strstr(type->data.mimetype.base, type_end_at, H2O_STRLIT("+xml")) != SIZE_MAX)
type->data.attr.is_compressible = 1;
/* make a rough guess on whether the type is blocking asset or not */
if (h2o_memis(type->data.mimetype.base, type_end_at, H2O_STRLIT("text/css")) ||
h2o_memis(type->data.mimetype.base, type_end_at, H2O_STRLIT("application/ecmascript")) ||
h2o_memis(type->data.mimetype.base, type_end_at, H2O_STRLIT("application/javascript")) ||
h2o_memis(type->data.mimetype.base, type_end_at, H2O_STRLIT("text/ecmascript")) ||
h2o_memis(type->data.mimetype.base, type_end_at, H2O_STRLIT("text/javascript")))
type->data.attr.priority = H2O_MIME_ATTRIBUTE_PRIORITY_HIGHEST;
return type;
}
static void dispose_dynamic_type(h2o_mimemap_type_t *type)
{
h2o_config_dispose_pathconf(&type->data.dynamic.pathconf);
}
static h2o_mimemap_type_t *create_dynamic_type(h2o_globalconf_t *globalconf)
{
h2o_mimemap_type_t *type = h2o_mem_alloc_shared(NULL, sizeof(*type), (void *)dispose_dynamic_type);
type->type = H2O_MIMEMAP_TYPE_DYNAMIC;
memset(&type->data.dynamic, 0, sizeof(type->data.dynamic));
h2o_config_init_pathconf(&type->data.dynamic.pathconf, globalconf, NULL, NULL);
return type;
}
h2o_mimemap_t *h2o_mimemap_create()
{
h2o_mimemap_t *mimemap = h2o_mem_alloc_shared(NULL, sizeof(*mimemap), on_dispose);
mimemap->extmap = kh_init(extmap);
mimemap->typeset = kh_init(typeset);
mimemap->default_type = create_extension_type("application/octet-stream");
mimemap->num_dynamic = 0;
on_link(mimemap, mimemap->default_type);
{ /* setup the tiny default */
static const char *default_types[] = {
#define MIMEMAP(ext, mime) ext, mime,
#include "mimemap/defaults.c.h"
#undef MIMEMAP
NULL};
const char **p;
for (p = default_types; *p != NULL; p += 2)
h2o_mimemap_define_mimetype(mimemap, p[0], p[1]);
}
rebuild_typeset(mimemap);
return mimemap;
}
h2o_mimemap_t *h2o_mimemap_clone(h2o_mimemap_t *src)
{
h2o_mimemap_t *dst = h2o_mem_alloc_shared(NULL, sizeof(*dst), on_dispose);
const char *ext;
h2o_mimemap_type_t *type;
dst->extmap = kh_init(extmap);
dst->typeset = kh_init(typeset);
kh_foreach(src->extmap, ext, type, {
int r;
khiter_t iter = kh_put(extmap, dst->extmap, ext, &r);
kh_val(dst->extmap, iter) = type;
h2o_mem_addref_shared((char *)ext);
h2o_mem_addref_shared(type);
on_link(dst, type);
});
dst->default_type = src->default_type;
h2o_mem_addref_shared(dst->default_type);
on_link(dst, dst->default_type);
rebuild_typeset(dst);
return dst;
}
void h2o_mimemap_on_context_init(h2o_mimemap_t *mimemap, h2o_context_t *ctx)
{
const char *ext;
h2o_mimemap_type_t *type;
kh_foreach(mimemap->extmap, ext, type, {
switch (type->type) {
case H2O_MIMEMAP_TYPE_DYNAMIC:
h2o_context_init_pathconf_context(ctx, &type->data.dynamic.pathconf);
break;
case H2O_MIMEMAP_TYPE_MIMETYPE:
break;
}
});
}
void h2o_mimemap_on_context_dispose(h2o_mimemap_t *mimemap, h2o_context_t *ctx)
{
const char *ext;
h2o_mimemap_type_t *type;
kh_foreach(mimemap->extmap, ext, type, {
switch (type->type) {
case H2O_MIMEMAP_TYPE_DYNAMIC:
h2o_context_dispose_pathconf_context(ctx, &type->data.dynamic.pathconf);
break;
case H2O_MIMEMAP_TYPE_MIMETYPE:
break;
}
});
}
int h2o_mimemap_has_dynamic_type(h2o_mimemap_t *mimemap)
{
return mimemap->num_dynamic != 0;
}
void h2o_mimemap_set_default_type(h2o_mimemap_t *mimemap, const char *mime)
{
h2o_mimemap_type_t *new_type;
/* obtain or create new type */
if ((new_type = h2o_mimemap_get_type_by_mimetype(mimemap, h2o_iovec_init(mime, strlen(mime)))) != NULL) {
h2o_mem_addref_shared(new_type);
} else {
new_type = create_extension_type(mime);
}
/* unlink the old one */
on_unlink(mimemap, mimemap->default_type);
h2o_mem_release_shared(mimemap->default_type);
/* update */
mimemap->default_type = new_type;
on_link(mimemap, new_type);
rebuild_typeset(mimemap);
}
static void set_type(h2o_mimemap_t *mimemap, const char *ext, h2o_mimemap_type_t *type)
{
/* obtain key, and remove the old value */
khiter_t iter = kh_get(extmap, mimemap->extmap, ext);
if (iter != kh_end(mimemap->extmap)) {
h2o_mimemap_type_t *oldtype = kh_val(mimemap->extmap, iter);
on_unlink(mimemap, oldtype);
h2o_mem_release_shared(oldtype);
} else {
int ret;
iter = kh_put(extmap, mimemap->extmap, dupref(ext).base, &ret);
assert(iter != kh_end(mimemap->extmap));
}
/* update */
h2o_mem_addref_shared(type);
kh_val(mimemap->extmap, iter) = type;
on_link(mimemap, type);
rebuild_typeset(mimemap);
}
void h2o_mimemap_define_mimetype(h2o_mimemap_t *mimemap, const char *ext, const char *mime)
{
h2o_mimemap_type_t *new_type;
if ((new_type = h2o_mimemap_get_type_by_mimetype(mimemap, h2o_iovec_init(mime, strlen(mime)))) != NULL) {
h2o_mem_addref_shared(new_type);
} else {
new_type = create_extension_type(mime);
}
set_type(mimemap, ext, new_type);
h2o_mem_release_shared(new_type);
}
h2o_mimemap_type_t *h2o_mimemap_define_dynamic(h2o_mimemap_t *mimemap, const char **exts, h2o_globalconf_t *globalconf)
{
h2o_mimemap_type_t *new_type = create_dynamic_type(globalconf);
size_t i;
for (i = 0; exts[i] != NULL; ++i)
set_type(mimemap, exts[i], new_type);
h2o_mem_release_shared(new_type);
return new_type;
}
void h2o_mimemap_remove_type(h2o_mimemap_t *mimemap, const char *ext)
{
khiter_t iter = kh_get(extmap, mimemap->extmap, ext);
if (iter != kh_end(mimemap->extmap)) {
const char *key = kh_key(mimemap->extmap, iter);
h2o_mimemap_type_t *type = kh_val(mimemap->extmap, iter);
on_unlink(mimemap, type);
h2o_mem_release_shared(type);
kh_del(extmap, mimemap->extmap, iter);
h2o_mem_release_shared((char *)key);
rebuild_typeset(mimemap);
}
}
h2o_mimemap_type_t *h2o_mimemap_get_default_type(h2o_mimemap_t *mimemap)
{
return mimemap->default_type;
}
h2o_mimemap_type_t *h2o_mimemap_get_type_by_extension(h2o_mimemap_t *mimemap, const char *ext)
{
if (ext != NULL) {
khiter_t iter = kh_get(extmap, mimemap->extmap, ext);
if (iter != kh_end(mimemap->extmap))
return kh_val(mimemap->extmap, iter);
}
return mimemap->default_type;
}
h2o_mimemap_type_t *h2o_mimemap_get_type_by_mimetype(h2o_mimemap_t *mimemap, h2o_iovec_t mime)
{
h2o_mimemap_type_t key = {H2O_MIMEMAP_TYPE_MIMETYPE};
khiter_t iter;
/* exact match */
key.data.mimetype = mime;
if ((iter = kh_get(typeset, mimemap->typeset, &key)) != kh_end(mimemap->typeset))
return kh_key(mimemap->typeset, iter);
/* determine the end of the type */
size_t type_end_at = 0;
for (; type_end_at != mime.len; ++type_end_at)
if (mime.base[type_end_at] == ';' || mime.base[type_end_at] == ' ')
goto HasAttributes;
/* no attributes */
return NULL;
HasAttributes:
/* perform search without attributes */
key.data.mimetype.len = type_end_at;
if ((iter = kh_get(typeset, mimemap->typeset, &key)) != kh_end(mimemap->typeset))
return kh_key(mimemap->typeset, iter);
return NULL;
}