| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| #include <zlib.h> |
| |
| |
| typedef struct { |
| ngx_flag_t enable; |
| ngx_flag_t no_buffer; |
| |
| ngx_array_t *types; /* array of ngx_http_gzip_type_t */ |
| |
| ngx_bufs_t bufs; |
| |
| ngx_uint_t http_version; |
| ngx_uint_t proxied; |
| |
| int level; |
| size_t wbits; |
| size_t memlevel; |
| ssize_t min_length; |
| } ngx_http_gzip_conf_t; |
| |
| |
| typedef struct { |
| ngx_str_t name; |
| ngx_uint_t enable; |
| } ngx_http_gzip_type_t; |
| |
| |
| #define NGX_HTTP_GZIP_PROXIED_OFF 0x0002 |
| #define NGX_HTTP_GZIP_PROXIED_EXPIRED 0x0004 |
| #define NGX_HTTP_GZIP_PROXIED_NO_CACHE 0x0008 |
| #define NGX_HTTP_GZIP_PROXIED_NO_STORE 0x0010 |
| #define NGX_HTTP_GZIP_PROXIED_PRIVATE 0x0020 |
| #define NGX_HTTP_GZIP_PROXIED_NO_LM 0x0040 |
| #define NGX_HTTP_GZIP_PROXIED_NO_ETAG 0x0080 |
| #define NGX_HTTP_GZIP_PROXIED_AUTH 0x0100 |
| #define NGX_HTTP_GZIP_PROXIED_ANY 0x0200 |
| |
| |
| typedef struct { |
| ngx_chain_t *in; |
| ngx_chain_t *free; |
| ngx_chain_t *busy; |
| ngx_chain_t *out; |
| ngx_chain_t **last_out; |
| ngx_buf_t *in_buf; |
| ngx_buf_t *out_buf; |
| ngx_int_t bufs; |
| |
| off_t length; |
| |
| void *preallocated; |
| char *free_mem; |
| ngx_uint_t allocated; |
| |
| unsigned flush:4; |
| unsigned redo:1; |
| unsigned done:1; |
| |
| size_t zin; |
| size_t zout; |
| |
| uint32_t crc32; |
| z_stream zstream; |
| ngx_http_request_t *request; |
| } ngx_http_gzip_ctx_t; |
| |
| |
| static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r, |
| ngx_http_gzip_conf_t *conf); |
| static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items, |
| u_int size); |
| static void ngx_http_gzip_filter_free(void *opaque, void *address); |
| static void ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx); |
| |
| static u_char *ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf, |
| ngx_http_log_op_t *op); |
| |
| static ngx_int_t ngx_http_gzip_add_log_formats(ngx_conf_t *cf); |
| |
| static ngx_int_t ngx_http_gzip_filter_init(ngx_cycle_t *cycle); |
| static void *ngx_http_gzip_create_conf(ngx_conf_t *cf); |
| static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf, |
| void *parent, void *child); |
| static char *ngx_http_gzip_set_types(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| static char *ngx_http_gzip_set_window(ngx_conf_t *cf, void *post, void *data); |
| static char *ngx_http_gzip_set_hash(ngx_conf_t *cf, void *post, void *data); |
| |
| |
| static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = { |
| ngx_conf_check_num_bounds, 1, 9 |
| }; |
| |
| static ngx_conf_post_handler_pt ngx_http_gzip_set_window_p = |
| ngx_http_gzip_set_window; |
| static ngx_conf_post_handler_pt ngx_http_gzip_set_hash_p = |
| ngx_http_gzip_set_hash; |
| |
| |
| |
| static ngx_conf_enum_t ngx_http_gzip_http_version[] = { |
| { ngx_string("1.0"), NGX_HTTP_VERSION_10 }, |
| { ngx_string("1.1"), NGX_HTTP_VERSION_11 }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_conf_bitmask_t ngx_http_gzip_proxied_mask[] = { |
| { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF }, |
| { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED }, |
| { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE }, |
| { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE }, |
| { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE }, |
| { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM }, |
| { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG }, |
| { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH }, |
| { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_command_t ngx_http_gzip_filter_commands[] = { |
| |
| { ngx_string("gzip"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |
| |NGX_CONF_FLAG, |
| ngx_conf_set_flag_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, enable), |
| NULL }, |
| |
| { ngx_string("gzip_buffers"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
| ngx_conf_set_bufs_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, bufs), |
| NULL }, |
| |
| { ngx_string("gzip_types"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
| ngx_http_gzip_set_types, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| 0, |
| NULL }, |
| |
| { ngx_string("gzip_comp_level"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_num_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, level), |
| &ngx_http_gzip_comp_level_bounds }, |
| |
| { ngx_string("gzip_window"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_size_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, wbits), |
| &ngx_http_gzip_set_window_p }, |
| |
| { ngx_string("gzip_hash"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_size_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, memlevel), |
| &ngx_http_gzip_set_hash_p }, |
| |
| { ngx_string("gzip_no_buffer"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
| ngx_conf_set_flag_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, no_buffer), |
| NULL }, |
| |
| { ngx_string("gzip_http_version"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ANY, |
| ngx_conf_set_enum_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, http_version), |
| &ngx_http_gzip_http_version }, |
| |
| { ngx_string("gzip_proxied"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ANY, |
| ngx_conf_set_bitmask_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, proxied), |
| &ngx_http_gzip_proxied_mask }, |
| |
| { ngx_string("gzip_min_length"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_size_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_gzip_conf_t, min_length), |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_http_module_t ngx_http_gzip_filter_module_ctx = { |
| ngx_http_gzip_add_log_formats, /* pre conf */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| NULL, /* create server configuration */ |
| NULL, /* merge server configuration */ |
| |
| ngx_http_gzip_create_conf, /* create location configuration */ |
| ngx_http_gzip_merge_conf, /* merge location configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_http_gzip_filter_module = { |
| NGX_MODULE, |
| &ngx_http_gzip_filter_module_ctx, /* module context */ |
| ngx_http_gzip_filter_commands, /* module directives */ |
| NGX_HTTP_MODULE, /* module type */ |
| ngx_http_gzip_filter_init, /* init module */ |
| NULL /* init process */ |
| }; |
| |
| |
| static ngx_http_log_op_name_t ngx_http_gzip_log_fmt_ops[] = { |
| { ngx_string("gzip_ratio"), NGX_INT32_LEN + 3, |
| NULL, NULL, ngx_http_gzip_log_ratio }, |
| { ngx_null_string, 0, NULL, NULL, NULL } |
| }; |
| |
| |
| |
| static u_char gzheader[10] = { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 }; |
| |
| #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) |
| |
| struct gztrailer { |
| uint32_t crc32; |
| uint32_t zlen; |
| }; |
| |
| #else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */ |
| |
| struct gztrailer { |
| u_char crc32[4]; |
| u_char zlen[4]; |
| }; |
| |
| #endif |
| |
| |
| static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
| static ngx_http_output_body_filter_pt ngx_http_next_body_filter; |
| |
| |
| static ngx_int_t ngx_http_gzip_header_filter(ngx_http_request_t *r) |
| { |
| ngx_uint_t i, found; |
| ngx_http_gzip_ctx_t *ctx; |
| ngx_http_gzip_conf_t *conf; |
| ngx_http_gzip_type_t *type; |
| |
| conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module); |
| |
| if (!conf->enable |
| || (r->headers_out.status != NGX_HTTP_OK |
| && r->headers_out.status != NGX_HTTP_FORBIDDEN |
| && r->headers_out.status != NGX_HTTP_NOT_FOUND) |
| || r->header_only |
| || r->http_version < conf->http_version |
| || r->headers_out.content_type == NULL |
| || (r->headers_out.content_encoding |
| && r->headers_out.content_encoding->value.len) |
| || r->headers_in.accept_encoding == NULL |
| || (r->headers_out.content_length_n != -1 |
| && r->headers_out.content_length_n < conf->min_length) |
| || ngx_strstr(r->headers_in.accept_encoding->value.data, "gzip") == NULL |
| ) |
| { |
| return ngx_http_next_header_filter(r); |
| } |
| |
| |
| found = 0; |
| type = conf->types->elts; |
| |
| for (i = 0; i < conf->types->nelts; i++) { |
| if (r->headers_out.content_type->value.len >= type[i].name.len |
| && ngx_strncasecmp(r->headers_out.content_type->value.data, |
| type[i].name.data, type[i].name.len) == 0) |
| { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) { |
| return ngx_http_next_header_filter(r); |
| } |
| |
| |
| if (r->headers_in.via) { |
| if (conf->proxied & NGX_HTTP_GZIP_PROXIED_OFF) { |
| return ngx_http_next_header_filter(r); |
| } |
| |
| if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_ANY) |
| && ngx_http_gzip_proxied(r, conf) == NGX_DECLINED) |
| { |
| return ngx_http_next_header_filter(r); |
| } |
| } |
| |
| |
| /* |
| * if the URL (without the "http://" prefix) is longer than 253 bytes |
| * then MSIE 4.x can not handle the compressed stream - it waits too long, |
| * hangs up or crashes |
| */ |
| |
| if (r->headers_in.msie4 && r->unparsed_uri.len > 200) { |
| return ngx_http_next_header_filter(r); |
| } |
| |
| |
| ngx_http_create_ctx(r, ctx, ngx_http_gzip_filter_module, |
| sizeof(ngx_http_gzip_ctx_t), NGX_ERROR); |
| ctx->request = r; |
| |
| r->headers_out.content_encoding = ngx_list_push(&r->headers_out.headers); |
| if (r->headers_out.content_encoding == NULL) { |
| return NGX_ERROR; |
| } |
| |
| r->headers_out.content_encoding->key.len = sizeof("Content-Encoding") - 1; |
| r->headers_out.content_encoding->key.data = (u_char *) "Content-Encoding"; |
| r->headers_out.content_encoding->value.len = sizeof("gzip") - 1; |
| r->headers_out.content_encoding->value.data = (u_char *) "gzip"; |
| |
| ctx->length = r->headers_out.content_length_n; |
| r->headers_out.content_length_n = -1; |
| if (r->headers_out.content_length) { |
| r->headers_out.content_length->key.len = 0; |
| r->headers_out.content_length = NULL; |
| } |
| r->filter_need_in_memory = 1; |
| |
| return ngx_http_next_header_filter(r); |
| } |
| |
| |
| static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r, |
| ngx_http_gzip_conf_t *conf) |
| { |
| time_t date, expires; |
| |
| if (r->headers_in.authorization |
| && (conf->proxied & NGX_HTTP_GZIP_PROXIED_AUTH)) |
| { |
| return NGX_OK; |
| } |
| |
| if (r->headers_out.expires) { |
| |
| if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_EXPIRED)) { |
| return NGX_DECLINED; |
| } |
| |
| expires = ngx_http_parse_time(r->headers_out.expires->value.data, |
| r->headers_out.expires->value.len); |
| if (expires == NGX_ERROR) { |
| return NGX_DECLINED; |
| } |
| |
| if (r->headers_out.date) { |
| date = ngx_http_parse_time(r->headers_out.date->value.data, |
| r->headers_out.date->value.len); |
| if (date == NGX_ERROR) { |
| return NGX_DECLINED; |
| } |
| |
| } else { |
| date = ngx_time(); |
| } |
| |
| if (expires < date) { |
| return NGX_OK; |
| } |
| |
| return NGX_DECLINED; |
| } |
| |
| if (r->headers_out.cache_control) { |
| |
| if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_CACHE) |
| && ngx_strstr(r->headers_out.cache_control->value.data, "no-cache")) |
| { |
| return NGX_OK; |
| } |
| |
| if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_STORE) |
| && ngx_strstr(r->headers_out.cache_control->value.data, "no-store")) |
| { |
| return NGX_OK; |
| } |
| |
| if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_PRIVATE) |
| && ngx_strstr(r->headers_out.cache_control->value.data, "private")) |
| { |
| return NGX_OK; |
| } |
| |
| return NGX_DECLINED; |
| } |
| |
| if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_LM) |
| && r->headers_out.last_modified) |
| { |
| return NGX_DECLINED; |
| } |
| |
| if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_ETAG) |
| && r->headers_out.etag) |
| { |
| return NGX_DECLINED; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t ngx_http_gzip_body_filter(ngx_http_request_t *r, |
| ngx_chain_t *in) |
| { |
| int rc, wbits, memlevel; |
| ngx_int_t last; |
| struct gztrailer *trailer; |
| ngx_buf_t *b; |
| ngx_chain_t *cl; |
| ngx_http_gzip_ctx_t *ctx; |
| ngx_http_gzip_conf_t *conf; |
| |
| ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module); |
| |
| if (ctx == NULL || ctx->done) { |
| return ngx_http_next_body_filter(r, in); |
| } |
| |
| conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module); |
| |
| if (ctx->preallocated == NULL) { |
| 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() and so on). |
| * Besides we free this memory as soon as the 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 x86 and sparc64 (32-bit mode) |
| * * 5920 bytes on amd64 and sparc64 |
| */ |
| |
| ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9)); |
| |
| if (!(ctx->preallocated = ngx_palloc(r->pool, ctx->allocated))) { |
| 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, 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); |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| b->memory = 1; |
| b->pos = gzheader; |
| b->last = b->pos + 10; |
| |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| cl->buf = b; |
| cl->next = NULL; |
| |
| /* |
| * We pass the gzheader to the next filter now to avoid its linking |
| * to the ctx->busy chain. zlib does not usually output the compressed |
| * data in the initial iterations, so the gzheader that was linked |
| * to the ctx->busy chain would be flushed by ngx_http_write_filter(). |
| */ |
| |
| if (ngx_http_next_body_filter(r, cl) == NGX_ERROR) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| ctx->last_out = &ctx->out; |
| |
| ctx->crc32 = crc32(0L, Z_NULL, 0); |
| ctx->flush = Z_NO_FLUSH; |
| } |
| |
| if (in) { |
| if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| } |
| |
| last = NGX_NONE; |
| |
| for ( ;; ) { |
| |
| for ( ;; ) { |
| |
| /* does zlib need a new data ? */ |
| |
| if (ctx->zstream.avail_in == 0 |
| && ctx->flush == Z_NO_FLUSH |
| && !ctx->redo) |
| { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "gzip in: %p", ctx->in); |
| |
| if (ctx->in == NULL) { |
| break; |
| } |
| |
| 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); |
| |
| /* STUB */ |
| if (ctx->in_buf->last < ctx->in_buf->pos) { |
| ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| "zstream.avail_in is huge"); |
| ctx->done = 1; |
| return NGX_ERROR; |
| } |
| /**/ |
| |
| 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 == 0) { |
| if (ctx->flush == Z_NO_FLUSH) { |
| continue; |
| } |
| |
| } else { |
| ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in, |
| ctx->zstream.avail_in); |
| } |
| } |
| |
| |
| /* is there a space for the gzipped data ? */ |
| |
| if (ctx->zstream.avail_out == 0) { |
| |
| 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) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| ctx->out_buf->tag = (ngx_buf_tag_t) |
| &ngx_http_gzip_filter_module; |
| ctx->out_buf->recycled = 1; |
| ctx->bufs++; |
| |
| } else { |
| break; |
| } |
| |
| ctx->zstream.next_out = ctx->out_buf->pos; |
| ctx->zstream.avail_out = conf->bufs.size; |
| } |
| |
| 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); |
| ngx_http_gzip_error(ctx); |
| 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 */ |
| |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| 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; |
| |
| ctx->redo = 1; |
| |
| continue; |
| } |
| |
| ctx->redo = 0; |
| |
| if (ctx->flush == Z_SYNC_FLUSH) { |
| |
| ctx->out_buf->flush = 0; |
| ctx->flush = Z_NO_FLUSH; |
| |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| 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 == Z_STREAM_END) { |
| |
| 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); |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| ngx_pfree(r->pool, ctx->preallocated); |
| |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| 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; |
| |
| 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 { |
| if (!(b = ngx_create_temp_buf(r->pool, 8))) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| b->last_buf = 1; |
| |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| ngx_http_gzip_error(ctx); |
| 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; |
| |
| break; |
| } |
| |
| if (conf->no_buffer && ctx->in == NULL) { |
| if (!(cl = ngx_alloc_chain_link(r->pool))) { |
| 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 (last == NGX_AGAIN && !ctx->done) { |
| return NGX_AGAIN; |
| } |
| |
| if (ctx->out == NULL && ctx->busy == NULL) { |
| return NGX_OK; |
| } |
| |
| last = ngx_http_next_body_filter(r, ctx->out); |
| |
| /* |
| * we do not check NGX_AGAIN here because the downstream filters |
| * may free some buffers and zlib may compress some data into them |
| */ |
| |
| if (last == NGX_ERROR) { |
| ngx_http_gzip_error(ctx); |
| return NGX_ERROR; |
| } |
| |
| ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out, |
| (ngx_buf_tag_t) &ngx_http_gzip_filter_module); |
| ctx->last_out = &ctx->out; |
| |
| if (ctx->done) { |
| return last; |
| } |
| } |
| } |
| |
| |
| static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size) |
| { |
| ngx_http_gzip_ctx_t *ctx = opaque; |
| |
| void *p; |
| ngx_uint_t alloc; |
| |
| alloc = items * size; |
| |
| if (alloc % 512 != 0) { |
| |
| /* |
| * The zlib deflate_state allocation, it takes about 6K, |
| * we allocate 8K. Other allocations are divisible by 512. |
| */ |
| |
| alloc = (alloc + ngx_pagesize - 1) & ~(ngx_pagesize - 1); |
| } |
| |
| if (alloc <= ctx->allocated) { |
| p = ctx->free_mem; |
| ctx->free_mem += alloc; |
| ctx->allocated -= alloc; |
| |
| ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, |
| "gzip alloc: n:%ud s:%ud a:%ud p:%p", |
| items, size, alloc, p); |
| |
| return p; |
| } |
| |
| ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0, |
| "gzip filter failed to use preallocated memory: %ud of %ud", |
| items * size, ctx->allocated); |
| |
| p = ngx_palloc(ctx->request->pool, items * size); |
| |
| return p; |
| } |
| |
| |
| static void ngx_http_gzip_filter_free(void *opaque, void *address) |
| { |
| #if 0 |
| ngx_http_gzip_ctx_t *ctx = opaque; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, |
| "gzip free: %p", address); |
| #endif |
| } |
| |
| |
| static u_char *ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf, |
| ngx_http_log_op_t *op) |
| { |
| ngx_uint_t zint, zfrac; |
| ngx_http_gzip_ctx_t *ctx; |
| |
| ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module); |
| |
| if (ctx == NULL || ctx->zout == 0) { |
| *buf = '-'; |
| return buf + 1; |
| } |
| |
| zint = (ngx_uint_t) (ctx->zin / ctx->zout); |
| zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100); |
| |
| if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) { |
| |
| /* the rounding, e.g., 2.125 to 2.13 */ |
| |
| zfrac++; |
| |
| if (zfrac > 99) { |
| zint++; |
| zfrac = 0; |
| } |
| } |
| |
| return ngx_sprintf(buf, "%ui.%02ui", zint, zfrac); |
| } |
| |
| |
| 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_log_formats(ngx_conf_t *cf) |
| { |
| ngx_http_log_op_name_t *op; |
| |
| for (op = ngx_http_gzip_log_fmt_ops; op->name.len; op++) { /* void */ } |
| op->run = NULL; |
| |
| for (op = ngx_http_log_fmt_ops; op->run; op++) { |
| if (op->name.len == 0) { |
| op = (ngx_http_log_op_name_t *) op->run; |
| } |
| } |
| |
| op->run = (ngx_http_log_op_run_pt) ngx_http_gzip_log_fmt_ops; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t ngx_http_gzip_filter_init(ngx_cycle_t *cycle) |
| { |
| ngx_http_next_header_filter = ngx_http_top_header_filter; |
| ngx_http_top_header_filter = ngx_http_gzip_header_filter; |
| |
| ngx_http_next_body_filter = ngx_http_top_body_filter; |
| ngx_http_top_body_filter = ngx_http_gzip_body_filter; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void *ngx_http_gzip_create_conf(ngx_conf_t *cf) |
| { |
| ngx_http_gzip_conf_t *conf; |
| |
| if (!(conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t)))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| /* |
| * set by ngx_pcalloc(): |
| * |
| * conf->bufs.num = 0; |
| * conf->proxied = 0; |
| * conf->types = NULL; |
| */ |
| |
| conf->enable = NGX_CONF_UNSET; |
| conf->no_buffer = NGX_CONF_UNSET; |
| |
| conf->http_version = NGX_CONF_UNSET_UINT; |
| |
| conf->level = NGX_CONF_UNSET; |
| conf->wbits = (size_t) NGX_CONF_UNSET; |
| conf->memlevel = (size_t) NGX_CONF_UNSET; |
| conf->min_length = NGX_CONF_UNSET; |
| |
| return conf; |
| } |
| |
| |
| static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf, |
| void *parent, void *child) |
| { |
| ngx_http_gzip_conf_t *prev = parent; |
| ngx_http_gzip_conf_t *conf = child; |
| |
| ngx_http_gzip_type_t *type; |
| |
| ngx_conf_merge_value(conf->enable, prev->enable, 0); |
| |
| ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 4, ngx_pagesize); |
| |
| ngx_conf_merge_unsigned_value(conf->http_version, prev->http_version, |
| NGX_HTTP_VERSION_11); |
| ngx_conf_merge_bitmask_value(conf->proxied, prev->proxied, |
| (NGX_CONF_BITMASK_SET |
| |NGX_HTTP_GZIP_PROXIED_OFF)); |
| |
| ngx_conf_merge_value(conf->level, prev->level, 1); |
| ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS); |
| ngx_conf_merge_size_value(conf->memlevel, prev->memlevel, |
| MAX_MEM_LEVEL - 1); |
| ngx_conf_merge_value(conf->min_length, prev->min_length, 0); |
| ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0); |
| |
| if (conf->types == NULL) { |
| if (prev->types == NULL) { |
| conf->types = ngx_array_create(cf->pool, 1, |
| sizeof(ngx_http_gzip_type_t)); |
| if (conf->types == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| if (!(type = ngx_array_push(conf->types))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| type->name.len = sizeof("text/html") - 1; |
| type->name.data = (u_char *) "text/html"; |
| type->enable = 1; |
| |
| } else { |
| conf->types = prev->types; |
| } |
| } |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char *ngx_http_gzip_set_types(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf) |
| { |
| ngx_http_gzip_conf_t *gcf = conf; |
| |
| ngx_str_t *value; |
| ngx_uint_t i; |
| ngx_http_gzip_type_t *type; |
| |
| if (gcf->types == NULL) { |
| gcf->types = ngx_array_create(cf->pool, 5, |
| sizeof(ngx_http_gzip_type_t)); |
| if (gcf->types == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| if (!(type = ngx_array_push(gcf->types))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| type->name.len = sizeof("text/html") - 1; |
| type->name.data = (u_char *) "text/html"; |
| type->enable = 1; |
| } |
| |
| value = cf->args->elts; |
| |
| for (i = 1; i < cf->args->nelts; i++) { |
| |
| if (ngx_strcmp(value[i].data, "text/html") == 0) { |
| continue; |
| } |
| |
| if (!(type = ngx_array_push(gcf->types))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| type->name.len = value[i].len; |
| |
| if (!(type->name.data = ngx_palloc(cf->pool, type->name.len + 1))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| ngx_cpystrn(type->name.data, value[i].data, type->name.len + 1); |
| } |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char *ngx_http_gzip_set_window(ngx_conf_t *cf, void *post, void *data) |
| { |
| int *np = data; |
| |
| int wbits, wsize; |
| |
| wbits = 15; |
| |
| for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) { |
| |
| if (wsize == *np) { |
| *np = wbits; |
| |
| return NGX_CONF_OK; |
| } |
| |
| wbits--; |
| } |
| |
| return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k"; |
| } |
| |
| |
| static char *ngx_http_gzip_set_hash(ngx_conf_t *cf, void *post, void *data) |
| { |
| int *np = data; |
| |
| int memlevel, hsize; |
| |
| memlevel = 9; |
| |
| for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) { |
| |
| if (hsize == *np) { |
| *np = memlevel; |
| |
| return NGX_CONF_OK; |
| } |
| |
| memlevel--; |
| } |
| |
| return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k"; |
| } |
