diff options
Diffstat (limited to 'web/server/h2o/libh2o/lib/handler/compress/gzip.c')
-rw-r--r-- | web/server/h2o/libh2o/lib/handler/compress/gzip.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/web/server/h2o/libh2o/lib/handler/compress/gzip.c b/web/server/h2o/libh2o/lib/handler/compress/gzip.c deleted file mode 100644 index c12260df3..000000000 --- a/web/server/h2o/libh2o/lib/handler/compress/gzip.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * Copyright (c) 2016 DeNA Co., Ltd., Kazuho Oku - * - * 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 <stdlib.h> -#include <zlib.h> -#include "h2o.h" - -#define WINDOW_BITS 31 -#ifndef BUF_SIZE /* is altered by unit test */ -#define BUF_SIZE 8192 -#endif - -typedef H2O_VECTOR(h2o_iovec_t) iovec_vector_t; - -struct st_gzip_context_t { - h2o_compress_context_t super; - z_stream zs; - int zs_is_open; - iovec_vector_t bufs; -}; - -static void do_compress(h2o_compress_context_t *_self, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state, - h2o_iovec_t **outbufs, size_t *outbufcnt); -static void do_decompress(h2o_compress_context_t *_self, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state, - h2o_iovec_t **outbufs, size_t *outbufcnt); - -static void *alloc_cb(void *_unused, unsigned int cnt, unsigned int sz) -{ - return h2o_mem_alloc(cnt * (size_t)sz); -} - -static void free_cb(void *_unused, void *p) -{ - free(p); -} - -static void expand_buf(iovec_vector_t *bufs) -{ - h2o_vector_reserve(NULL, bufs, bufs->size + 1); - bufs->entries[bufs->size++] = h2o_iovec_init(h2o_mem_alloc(BUF_SIZE), 0); -} - -typedef int (*processor)(z_streamp strm, int flush); - -static size_t process_chunk(struct st_gzip_context_t *self, const void *src, size_t len, int flush, size_t bufindex, processor proc) -{ - int ret; - - self->zs.next_in = (void *)src; - self->zs.avail_in = (unsigned)len; - - /* man says: If inflate/deflate returns with avail_out == 0, this function must be called again with the same value of the flush - * parameter and more output space (updated avail_out), until the flush is complete (function returns with non-zero avail_out). - */ - do { - /* expand buffer (note: in case of Z_SYNC_FLUSH we need to supply at least 6 bytes of output buffer) */ - if (self->bufs.entries[bufindex].len + 32 > BUF_SIZE) { - ++bufindex; - if (bufindex == self->bufs.size) - expand_buf(&self->bufs); - self->bufs.entries[bufindex].len = 0; - } - self->zs.next_out = (void *)(self->bufs.entries[bufindex].base + self->bufs.entries[bufindex].len); - self->zs.avail_out = (unsigned)(BUF_SIZE - self->bufs.entries[bufindex].len); - ret = proc(&self->zs, flush); - /* inflate() returns Z_BUF_ERROR if flush is set to Z_FINISH at the middle of the compressed data */ - assert(ret == Z_OK || ret == Z_STREAM_END || ret == Z_BUF_ERROR); - self->bufs.entries[bufindex].len = BUF_SIZE - self->zs.avail_out; - } while (self->zs.avail_out == 0 && ret != Z_STREAM_END); - - return bufindex; -} - -static void do_process(h2o_compress_context_t *_self, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state, - h2o_iovec_t **outbufs, size_t *outbufcnt, processor proc) -{ - struct st_gzip_context_t *self = (void *)_self; - size_t outbufindex; - h2o_iovec_t last_buf; - - outbufindex = 0; - self->bufs.entries[0].len = 0; - - if (inbufcnt != 0) { - size_t i; - for (i = 0; i != inbufcnt - 1; ++i) - outbufindex = process_chunk(self, inbufs[i].base, inbufs[i].len, Z_NO_FLUSH, outbufindex, proc); - last_buf = inbufs[i]; - } else { - last_buf = h2o_iovec_init(NULL, 0); - } - outbufindex = process_chunk(self, last_buf.base, last_buf.len, h2o_send_state_is_in_progress(state) ? Z_SYNC_FLUSH : Z_FINISH, - outbufindex, proc); - - *outbufs = self->bufs.entries; - *outbufcnt = outbufindex + 1; - - if (!h2o_send_state_is_in_progress(state)) { - if (self->super.transform == do_compress) { - deflateEnd(&self->zs); - } else { - inflateEnd(&self->zs); - } - self->zs_is_open = 0; - } -} - -static void do_compress(h2o_compress_context_t *_self, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state, - h2o_iovec_t **outbufs, size_t *outbufcnt) -{ - do_process(_self, inbufs, inbufcnt, state, outbufs, outbufcnt, (processor)deflate); -} - -static void do_decompress(h2o_compress_context_t *_self, h2o_iovec_t *inbufs, size_t inbufcnt, h2o_send_state_t state, - h2o_iovec_t **outbufs, size_t *outbufcnt) -{ - do_process(_self, inbufs, inbufcnt, state, outbufs, outbufcnt, (processor)inflate); -} - -static void do_free(void *_self) -{ - struct st_gzip_context_t *self = _self; - size_t i; - - if (self->zs_is_open) { - if (self->super.transform == do_compress) { - deflateEnd(&self->zs); - } else { - inflateEnd(&self->zs); - } - } - - for (i = 0; i != self->bufs.size; ++i) - free(self->bufs.entries[i].base); - free(self->bufs.entries); -} - -static struct st_gzip_context_t *gzip_open(h2o_mem_pool_t *pool) -{ - struct st_gzip_context_t *self = h2o_mem_alloc_shared(pool, sizeof(*self), do_free); - - self->super.name = h2o_iovec_init(H2O_STRLIT("gzip")); - self->super.transform = NULL; - self->zs.zalloc = alloc_cb; - self->zs.zfree = free_cb; - self->zs.opaque = NULL; - self->zs_is_open = 1; - self->bufs = (iovec_vector_t){NULL}; - expand_buf(&self->bufs); - - return self; -} - -h2o_compress_context_t *h2o_compress_gzip_open(h2o_mem_pool_t *pool, int quality) -{ - struct st_gzip_context_t *self = gzip_open(pool); - self->super.transform = do_compress; - /* Z_BEST_SPEED for on-the-fly compression, memlevel set to 8 as suggested by the manual */ - deflateInit2(&self->zs, quality, Z_DEFLATED, WINDOW_BITS, 8, Z_DEFAULT_STRATEGY); - - return &self->super; -} - -h2o_compress_context_t *h2o_compress_gunzip_open(h2o_mem_pool_t *pool) -{ - struct st_gzip_context_t *self = gzip_open(pool); - self->super.transform = do_decompress; - inflateInit2(&self->zs, WINDOW_BITS); - - return &self->super; -} |