static void add_headers_unconditional(struct st_h2o_sendfile_generator_t *self, h2o_req_t *req) { /* RFC 7232 4.1: The server generating a 304 response MUST generate any of the following header fields that would have been sent * in a 200 (OK) response to the same request: Cache-Control, Content-Location, Date, ETag, Expires, and Vary (snip) a sender * SHOULD NOT generate representation metadata other than the above listed fields unless said metadata exists for the purpose of * guiding cache updates. */ if (self->send_etag) { size_t etag_len = h2o_filecache_get_etag(self->file.ref, self->header_bufs.etag); h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_ETAG, self->header_bufs.etag, etag_len); } if (self->send_vary) h2o_set_header_token(&req->pool, &req->res.headers, H2O_TOKEN_VARY, H2O_STRLIT("accept-encoding")); }
static void on_setup_ostream(h2o_filter_t *_self, h2o_req_t *req, h2o_ostream_t **slot) { struct st_compress_filter_t *self = (void *)_self; struct st_compress_encoder_t *encoder; int compressible_types; h2o_compress_context_t *compressor; ssize_t i; if (req->version < 0x101) goto Next; if (req->res.status != 200) goto Next; if (h2o_memis(req->input.method.base, req->input.method.len, H2O_STRLIT("HEAD"))) goto Next; if (req->res.mime_attr == NULL) h2o_req_fill_mime_attributes(req); if (!req->res.mime_attr->is_compressible) goto Next; if (req->res.content_length < self->args.min_size) goto Next; /* skip if failed to gather the list of compressible types */ if ((compressible_types = h2o_get_compressible_types(&req->headers)) == 0) goto Next; /* skip if content-encoding header is being set (as well as obtain the location of accept-ranges) */ size_t content_encoding_header_index = -1, accept_ranges_header_index = -1; for (i = 0; i != req->res.headers.size; ++i) { if (req->res.headers.entries[i].name == &H2O_TOKEN_CONTENT_ENCODING->buf) content_encoding_header_index = i; else if (req->res.headers.entries[i].name == &H2O_TOKEN_ACCEPT_RANGES->buf) accept_ranges_header_index = i; else continue; } if (content_encoding_header_index != -1) goto Next; /* open the compressor */ #ifndef _MSC_VER #else #define H2O_USE_BROTLI 0 #endif #if H2O_USE_BROTLI if (self->args.brotli.quality != -1 && (compressible_types & H2O_COMPRESSIBLE_BROTLI) != 0) { compressor = h2o_compress_brotli_open(&req->pool, self->args.brotli.quality, req->res.content_length); } else #endif if (self->args.gzip.quality != -1 && (compressible_types & H2O_COMPRESSIBLE_GZIP) != 0) { compressor = h2o_compress_gzip_open(&req->pool, self->args.gzip.quality); } else { goto Next; } /* adjust the response headers */ req->res.content_length = SIZE_MAX; h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_CONTENT_ENCODING, compressor->name.base, compressor->name.len); h2o_set_header_token(&req->pool, &req->res.headers, H2O_TOKEN_VARY, H2O_STRLIT("accept-encoding")); if (accept_ranges_header_index != -1) { req->res.headers.entries[accept_ranges_header_index].value = h2o_iovec_init(H2O_STRLIT("none")); } else { h2o_add_header(&req->pool, &req->res.headers, H2O_TOKEN_ACCEPT_RANGES, H2O_STRLIT("none")); } /* setup filter */ encoder = (void *)h2o_add_ostream(req, sizeof(*encoder), slot); encoder->super.do_send = do_send; slot = &encoder->super.next; encoder->compressor = compressor; /* adjust preferred chunk size (compress by 8192 bytes) */ if (req->preferred_chunk_size > BUF_SIZE) req->preferred_chunk_size = BUF_SIZE; Next: h2o_setup_next_ostream(req, slot); }