mirror of
https://github.com/nginx/nginx.git
synced 2025-02-25 18:55:26 -06:00
*) split ngx_http_gzip_body_filter()
*) send gzheader together with the filter's first output
This commit is contained in:
Igor Sysoev
parent
051d85f6b0
commit
3e8c2f7811
@ -48,6 +48,7 @@ typedef struct {
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unsigned redo:1;
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unsigned done:1;
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unsigned nomem:1;
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unsigned gzheader:1;
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size_t zin;
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size_t zout;
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@ -58,10 +59,39 @@ typedef struct {
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} ngx_http_gzip_ctx_t;
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#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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struct gztrailer {
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uint32_t crc32;
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uint32_t zlen;
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};
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#else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
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struct gztrailer {
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u_char crc32[4];
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u_char zlen[4];
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};
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#endif
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static ngx_int_t ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_filter_gzheader(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_filter_add_data(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_filter_get_buf(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_filter_deflate(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
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ngx_http_gzip_ctx_t *ctx);
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static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
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u_int size);
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static void ngx_http_gzip_filter_free(void *opaque, void *address);
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static void ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx);
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static ngx_int_t ngx_http_gzip_add_variables(ngx_conf_t *cf);
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static ngx_int_t ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
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@ -177,25 +207,6 @@ ngx_module_t ngx_http_gzip_filter_module = {
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};
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static u_char gzheader[10] = { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
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#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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struct gztrailer {
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uint32_t crc32;
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uint32_t zlen;
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};
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#else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
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struct gztrailer {
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u_char crc32[4];
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u_char zlen[4];
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};
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#endif
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static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio");
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static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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@ -262,12 +273,9 @@ ngx_http_gzip_header_filter(ngx_http_request_t *r)
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static ngx_int_t
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ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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{
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int rc, wbits, memlevel;
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struct gztrailer *trailer;
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ngx_buf_t *b;
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ngx_chain_t *cl;
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ngx_http_gzip_ctx_t *ctx;
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ngx_http_gzip_conf_t *conf;
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int rc;
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ngx_chain_t *cl;
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ngx_http_gzip_ctx_t *ctx;
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ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
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@ -275,98 +283,24 @@ ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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return ngx_http_next_body_filter(r, in);
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}
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conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
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if (ctx->preallocated == NULL) {
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wbits = conf->wbits;
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memlevel = conf->memlevel;
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if (ctx->length > 0) {
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/* the actual zlib window size is smaller by 262 bytes */
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while (ctx->length < ((1 << (wbits - 1)) - 262)) {
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wbits--;
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memlevel--;
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}
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if (ngx_http_gzip_filter_deflate_start(r, ctx) != NGX_OK) {
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goto failed;
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}
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/*
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* We preallocate a memory for zlib in one buffer (200K-400K), this
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* decreases a number of malloc() and free() calls and also probably
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* decreases a number of syscalls (sbrk() and so on).
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* Besides we free this memory as soon as the gzipping will complete
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* and do not wait while a whole response will be sent to a client.
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*
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* 8K is for zlib deflate_state, it takes
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* *) 5816 bytes on i386 and sparc64 (32-bit mode)
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* *) 5920 bytes on amd64 and sparc64
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*/
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ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
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ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
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if (ctx->preallocated == NULL) {
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return NGX_ERROR;
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}
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ctx->free_mem = ctx->preallocated;
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ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
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ctx->zstream.zfree = ngx_http_gzip_filter_free;
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ctx->zstream.opaque = ctx;
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rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
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-wbits, memlevel, Z_DEFAULT_STRATEGY);
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if (rc != Z_OK) {
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ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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"deflateInit2() failed: %d", rc);
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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if (b == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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b->memory = 1;
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b->pos = gzheader;
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b->last = b->pos + 10;
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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cl->buf = b;
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cl->next = NULL;
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ctx->out = cl;
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ctx->last_out = &cl->next;
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r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
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ctx->crc32 = crc32(0L, Z_NULL, 0);
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ctx->flush = Z_NO_FLUSH;
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}
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if (in) {
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if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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goto failed;
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}
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}
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if (ctx->nomem) {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"gzip nomem");
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/* flush busy buffers */
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if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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goto failed;
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}
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cl = NULL;
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@ -378,276 +312,63 @@ ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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for ( ;; ) {
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/* cycle while we can write to a client */
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for ( ;; ) {
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/* does zlib need a new data ? */
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/* cycle while there is data to feed zlib and ... */
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if (ctx->zstream.avail_in == 0
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&& ctx->flush == Z_NO_FLUSH
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&& !ctx->redo)
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{
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"gzip in: %p", ctx->in);
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rc = ngx_http_gzip_filter_add_data(r, ctx);
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if (ctx->in == NULL) {
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break;
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}
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ctx->in_buf = ctx->in->buf;
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ctx->in = ctx->in->next;
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ctx->zstream.next_in = ctx->in_buf->pos;
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ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
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ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"gzip in_buf:%p ni:%p ai:%ud",
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ctx->in_buf,
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ctx->zstream.next_in, ctx->zstream.avail_in);
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/* STUB */
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if (ctx->in_buf->last < ctx->in_buf->pos) {
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ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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"zstream.avail_in is huge");
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ctx->done = 1;
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return NGX_ERROR;
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}
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/**/
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if (ctx->in_buf->last_buf) {
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ctx->flush = Z_FINISH;
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} else if (ctx->in_buf->flush) {
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ctx->flush = Z_SYNC_FLUSH;
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}
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if (ctx->zstream.avail_in == 0) {
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if (ctx->flush == Z_NO_FLUSH) {
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continue;
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}
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} else {
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ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
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ctx->zstream.avail_in);
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}
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if (rc == NGX_DECLINED) {
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break;
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}
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/* is there a space for the gzipped data ? */
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if (ctx->zstream.avail_out == 0) {
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if (ctx->free) {
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ctx->out_buf = ctx->free->buf;
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ctx->free = ctx->free->next;
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} else if (ctx->bufs < conf->bufs.num) {
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ctx->out_buf = ngx_create_temp_buf(r->pool,
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conf->bufs.size);
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if (ctx->out_buf == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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ctx->out_buf->tag = (ngx_buf_tag_t)
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&ngx_http_gzip_filter_module;
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ctx->out_buf->recycled = 1;
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ctx->bufs++;
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} else {
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ctx->nomem = 1;
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break;
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}
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ctx->zstream.next_out = ctx->out_buf->pos;
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ctx->zstream.avail_out = conf->bufs.size;
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}
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ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
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ctx->zstream.next_in, ctx->zstream.next_out,
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ctx->zstream.avail_in, ctx->zstream.avail_out,
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ctx->flush, ctx->redo);
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rc = deflate(&ctx->zstream, ctx->flush);
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if (rc != Z_OK && rc != Z_STREAM_END) {
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ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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"deflate() failed: %d, %d", ctx->flush, rc);
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
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ctx->zstream.next_in, ctx->zstream.next_out,
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ctx->zstream.avail_in, ctx->zstream.avail_out,
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rc);
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ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"gzip in_buf:%p pos:%p",
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ctx->in_buf, ctx->in_buf->pos);
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if (ctx->zstream.next_in) {
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ctx->in_buf->pos = ctx->zstream.next_in;
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if (ctx->zstream.avail_in == 0) {
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ctx->zstream.next_in = NULL;
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}
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}
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ctx->out_buf->last = ctx->zstream.next_out;
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if (ctx->zstream.avail_out == 0) {
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/* zlib wants to output some more gzipped data */
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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cl->buf = ctx->out_buf;
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cl->next = NULL;
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*ctx->last_out = cl;
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ctx->last_out = &cl->next;
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ctx->redo = 1;
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if (rc == NGX_AGAIN) {
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continue;
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}
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ctx->redo = 0;
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if (ctx->flush == Z_SYNC_FLUSH) {
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/* ... there are buffers to write zlib output */
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ctx->zstream.avail_out = 0;
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ctx->out_buf->flush = 1;
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ctx->flush = Z_NO_FLUSH;
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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cl->buf = ctx->out_buf;
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cl->next = NULL;
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*ctx->last_out = cl;
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ctx->last_out = &cl->next;
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rc = ngx_http_gzip_filter_get_buf(r, ctx);
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if (rc == NGX_DECLINED) {
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break;
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}
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if (rc == Z_STREAM_END) {
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if (rc == NGX_ERROR) {
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goto failed;
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}
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ctx->zin = ctx->zstream.total_in;
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ctx->zout = 10 + ctx->zstream.total_out + 8;
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rc = deflateEnd(&ctx->zstream);
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if (rc != Z_OK) {
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ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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"deflateEnd() failed: %d", rc);
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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ngx_pfree(r->pool, ctx->preallocated);
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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cl->buf = ctx->out_buf;
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cl->next = NULL;
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*ctx->last_out = cl;
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ctx->last_out = &cl->next;
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if (ctx->zstream.avail_out >= 8) {
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trailer = (struct gztrailer *) ctx->out_buf->last;
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ctx->out_buf->last += 8;
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ctx->out_buf->last_buf = 1;
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} else {
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b = ngx_create_temp_buf(r->pool, 8);
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if (b == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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b->last_buf = 1;
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cl = ngx_alloc_chain_link(r->pool);
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if (cl == NULL) {
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ngx_http_gzip_error(ctx);
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return NGX_ERROR;
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}
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cl->buf = b;
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cl->next = NULL;
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*ctx->last_out = cl;
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ctx->last_out = &cl->next;
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trailer = (struct gztrailer *) b->pos;
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b->last += 8;
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}
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#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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trailer->crc32 = ctx->crc32;
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trailer->zlen = ctx->zin;
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#else
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trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
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trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
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trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
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trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
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trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
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trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
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trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
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trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
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#endif
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ctx->zstream.avail_in = 0;
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ctx->zstream.avail_out = 0;
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ctx->done = 1;
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r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
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rc = ngx_http_gzip_filter_deflate(r, ctx);
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if (rc == NGX_OK) {
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break;
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}
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if (conf->no_buffer && ctx->in == NULL) {
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cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
ngx_http_gzip_error(ctx);
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = ctx->out_buf;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
|
||||
break;
|
||||
if (rc == NGX_ERROR) {
|
||||
goto failed;
|
||||
}
|
||||
|
||||
/* rc == NGX_AGAIN */
|
||||
}
|
||||
|
||||
if (ctx->out == NULL) {
|
||||
return NGX_AGAIN;
|
||||
}
|
||||
|
||||
if (!ctx->gzheader) {
|
||||
if (ngx_http_gzip_filter_gzheader(r, ctx) != NGX_OK) {
|
||||
goto failed;
|
||||
}
|
||||
}
|
||||
|
||||
rc = ngx_http_next_body_filter(r, ctx->out);
|
||||
|
||||
if (rc == NGX_ERROR) {
|
||||
ngx_http_gzip_error(ctx);
|
||||
return NGX_ERROR;
|
||||
goto failed;
|
||||
}
|
||||
|
||||
ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
||||
@ -660,6 +381,400 @@ ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
|
||||
/* unreachable */
|
||||
|
||||
failed:
|
||||
|
||||
ctx->done = 1;
|
||||
|
||||
if (ctx->preallocated) {
|
||||
deflateEnd(&ctx->zstream);
|
||||
|
||||
ngx_pfree(r->pool, ctx->preallocated);
|
||||
}
|
||||
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
|
||||
ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
int rc, wbits, memlevel;
|
||||
ngx_http_gzip_conf_t *conf;
|
||||
|
||||
conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
||||
|
||||
wbits = conf->wbits;
|
||||
memlevel = conf->memlevel;
|
||||
|
||||
if (ctx->length > 0) {
|
||||
|
||||
/* the actual zlib window size is smaller by 262 bytes */
|
||||
|
||||
while (ctx->length < ((1 << (wbits - 1)) - 262)) {
|
||||
wbits--;
|
||||
memlevel--;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* We preallocate a memory for zlib in one buffer (200K-400K), this
|
||||
* decreases a number of malloc() and free() calls and also probably
|
||||
* decreases a number of syscalls (sbrk()/mmap() and so on).
|
||||
* Besides we free the memory as soon as a gzipping will complete
|
||||
* and do not wait while a whole response will be sent to a client.
|
||||
*
|
||||
* 8K is for zlib deflate_state, it takes
|
||||
* *) 5816 bytes on i386 and sparc64 (32-bit mode)
|
||||
* *) 5920 bytes on amd64 and sparc64
|
||||
*/
|
||||
|
||||
ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
||||
|
||||
ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
|
||||
if (ctx->preallocated == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
ctx->free_mem = ctx->preallocated;
|
||||
|
||||
ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
||||
ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
||||
ctx->zstream.opaque = ctx;
|
||||
|
||||
rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
|
||||
-wbits, memlevel, Z_DEFAULT_STRATEGY);
|
||||
|
||||
if (rc != Z_OK) {
|
||||
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
||||
"deflateInit2() failed: %d", rc);
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
|
||||
|
||||
ctx->last_out = &ctx->out;
|
||||
ctx->crc32 = crc32(0L, Z_NULL, 0);
|
||||
ctx->flush = Z_NO_FLUSH;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_gzheader(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
ngx_buf_t *b;
|
||||
ngx_chain_t *cl;
|
||||
static u_char gzheader[10] =
|
||||
{ 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
|
||||
|
||||
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
||||
if (b == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
b->memory = 1;
|
||||
b->pos = gzheader;
|
||||
b->last = b->pos + 10;
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = b;
|
||||
cl->next = ctx->out;
|
||||
ctx->out = cl;
|
||||
|
||||
ctx->gzheader = 1;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_add_data(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) {
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
||||
"gzip in: %p", ctx->in);
|
||||
|
||||
if (ctx->in == NULL) {
|
||||
return NGX_DECLINED;
|
||||
}
|
||||
|
||||
ctx->in_buf = ctx->in->buf;
|
||||
ctx->in = ctx->in->next;
|
||||
|
||||
ctx->zstream.next_in = ctx->in_buf->pos;
|
||||
ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
||||
|
||||
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
||||
"gzip in_buf:%p ni:%p ai:%ud",
|
||||
ctx->in_buf,
|
||||
ctx->zstream.next_in, ctx->zstream.avail_in);
|
||||
|
||||
if (ctx->in_buf->last_buf) {
|
||||
ctx->flush = Z_FINISH;
|
||||
|
||||
} else if (ctx->in_buf->flush) {
|
||||
ctx->flush = Z_SYNC_FLUSH;
|
||||
}
|
||||
|
||||
if (ctx->zstream.avail_in) {
|
||||
|
||||
ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
||||
ctx->zstream.avail_in);
|
||||
|
||||
} else if (ctx->flush == Z_NO_FLUSH) {
|
||||
return NGX_AGAIN;
|
||||
}
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_get_buf(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
ngx_http_gzip_conf_t *conf;
|
||||
|
||||
if (ctx->zstream.avail_out) {
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
||||
|
||||
if (ctx->free) {
|
||||
ctx->out_buf = ctx->free->buf;
|
||||
ctx->free = ctx->free->next;
|
||||
|
||||
} else if (ctx->bufs < conf->bufs.num) {
|
||||
|
||||
ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size);
|
||||
if (ctx->out_buf == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gzip_filter_module;
|
||||
ctx->out_buf->recycled = 1;
|
||||
ctx->bufs++;
|
||||
|
||||
} else {
|
||||
ctx->nomem = 1;
|
||||
return NGX_DECLINED;
|
||||
}
|
||||
|
||||
ctx->zstream.next_out = ctx->out_buf->pos;
|
||||
ctx->zstream.avail_out = conf->bufs.size;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_deflate(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
int rc;
|
||||
ngx_chain_t *cl;
|
||||
ngx_http_gzip_conf_t *conf;
|
||||
|
||||
ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
||||
"deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
|
||||
ctx->zstream.next_in, ctx->zstream.next_out,
|
||||
ctx->zstream.avail_in, ctx->zstream.avail_out,
|
||||
ctx->flush, ctx->redo);
|
||||
|
||||
rc = deflate(&ctx->zstream, ctx->flush);
|
||||
|
||||
if (rc != Z_OK && rc != Z_STREAM_END) {
|
||||
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
||||
"deflate() failed: %d, %d", ctx->flush, rc);
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
||||
"deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
|
||||
ctx->zstream.next_in, ctx->zstream.next_out,
|
||||
ctx->zstream.avail_in, ctx->zstream.avail_out,
|
||||
rc);
|
||||
|
||||
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
||||
"gzip in_buf:%p pos:%p",
|
||||
ctx->in_buf, ctx->in_buf->pos);
|
||||
|
||||
if (ctx->zstream.next_in) {
|
||||
ctx->in_buf->pos = ctx->zstream.next_in;
|
||||
|
||||
if (ctx->zstream.avail_in == 0) {
|
||||
ctx->zstream.next_in = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
ctx->out_buf->last = ctx->zstream.next_out;
|
||||
|
||||
if (ctx->zstream.avail_out == 0) {
|
||||
|
||||
/* zlib wants to output some more gzipped data */
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = ctx->out_buf;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
|
||||
ctx->redo = 1;
|
||||
|
||||
return NGX_AGAIN;
|
||||
}
|
||||
|
||||
ctx->redo = 0;
|
||||
|
||||
if (ctx->flush == Z_SYNC_FLUSH) {
|
||||
|
||||
ctx->zstream.avail_out = 0;
|
||||
ctx->out_buf->flush = 1;
|
||||
ctx->flush = Z_NO_FLUSH;
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = ctx->out_buf;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
if (rc == Z_STREAM_END) {
|
||||
|
||||
if (ngx_http_gzip_filter_deflate_end(r, ctx) != NGX_OK) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
||||
|
||||
if (conf->no_buffer && ctx->in == NULL) {
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = ctx->out_buf;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
return NGX_AGAIN;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
|
||||
ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
int rc;
|
||||
ngx_buf_t *b;
|
||||
ngx_chain_t *cl;
|
||||
struct gztrailer *trailer;
|
||||
|
||||
ctx->zin = ctx->zstream.total_in;
|
||||
ctx->zout = 10 + ctx->zstream.total_out + 8;
|
||||
|
||||
rc = deflateEnd(&ctx->zstream);
|
||||
|
||||
if (rc != Z_OK) {
|
||||
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
||||
"deflateEnd() failed: %d", rc);
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
ngx_pfree(r->pool, ctx->preallocated);
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = ctx->out_buf;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
|
||||
if (ctx->zstream.avail_out >= 8) {
|
||||
trailer = (struct gztrailer *) ctx->out_buf->last;
|
||||
ctx->out_buf->last += 8;
|
||||
ctx->out_buf->last_buf = 1;
|
||||
|
||||
} else {
|
||||
b = ngx_create_temp_buf(r->pool, 8);
|
||||
if (b == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
b->last_buf = 1;
|
||||
|
||||
cl = ngx_alloc_chain_link(r->pool);
|
||||
if (cl == NULL) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
cl->buf = b;
|
||||
cl->next = NULL;
|
||||
*ctx->last_out = cl;
|
||||
ctx->last_out = &cl->next;
|
||||
trailer = (struct gztrailer *) b->pos;
|
||||
b->last += 8;
|
||||
}
|
||||
|
||||
#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
||||
|
||||
trailer->crc32 = ctx->crc32;
|
||||
trailer->zlen = ctx->zin;
|
||||
|
||||
#else
|
||||
|
||||
trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
|
||||
trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
|
||||
trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
|
||||
trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
|
||||
|
||||
trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
|
||||
trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
|
||||
trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
|
||||
trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
|
||||
|
||||
#endif
|
||||
|
||||
ctx->zstream.avail_in = 0;
|
||||
ctx->zstream.avail_out = 0;
|
||||
|
||||
ctx->done = 1;
|
||||
|
||||
r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
@ -717,24 +832,6 @@ ngx_http_gzip_filter_free(void *opaque, void *address)
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx)
|
||||
{
|
||||
deflateEnd(&ctx->zstream);
|
||||
|
||||
if (ctx->preallocated) {
|
||||
ngx_pfree(ctx->request->pool, ctx->preallocated);
|
||||
}
|
||||
|
||||
ctx->zstream.avail_in = 0;
|
||||
ctx->zstream.avail_out = 0;
|
||||
|
||||
ctx->done = 1;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_http_gzip_add_variables(ngx_conf_t *cf)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user