| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| #include <apr_date.h> |
| #include <apr_lib.h> |
| #include <apr_strings.h> |
| |
| #include <httpd.h> |
| #include <http_core.h> |
| #include <http_log.h> |
| #include <http_connection.h> |
| #include <http_protocol.h> |
| #include <http_request.h> |
| #include <util_time.h> |
| |
| #include "h2_private.h" |
| #include "h2.h" |
| #include "h2_config.h" |
| #include "h2_conn_ctx.h" |
| #include "h2_headers.h" |
| #include "h2_c1.h" |
| #include "h2_c2_filter.h" |
| #include "h2_c2.h" |
| #include "h2_mplx.h" |
| #include "h2_request.h" |
| #include "h2_util.h" |
| |
| |
| #if AP_HAS_RESPONSE_BUCKETS |
| |
| apr_status_t h2_c2_filter_notes_out(ap_filter_t *f, apr_bucket_brigade *bb) |
| { |
| apr_bucket *b; |
| request_rec *r_prev; |
| ap_bucket_response *resp; |
| const char *err; |
| |
| if (!f->r) { |
| goto pass; |
| } |
| |
| for (b = APR_BRIGADE_FIRST(bb); |
| b != APR_BRIGADE_SENTINEL(bb); |
| b = APR_BUCKET_NEXT(b)) |
| { |
| if (AP_BUCKET_IS_RESPONSE(b)) { |
| resp = b->data; |
| if (resp->status >= 400 && f->r->prev) { |
| /* Error responses are commonly handled via internal |
| * redirects to error documents. That creates a new |
| * request_rec with 'prev' set to the original. |
| * Each of these has its onw 'notes'. |
| * We'd like to copy interesting ones into the current 'r->notes' |
| * as we reset HTTP/2 stream with H2 specific error codes then. |
| */ |
| for (r_prev = f->r; r_prev != NULL; r_prev = r_prev->prev) { |
| if ((err = apr_table_get(r_prev->notes, "ssl-renegotiate-forbidden"))) { |
| if (r_prev != f->r) { |
| apr_table_setn(resp->notes, "ssl-renegotiate-forbidden", err); |
| } |
| break; |
| } |
| } |
| } |
| else if (h2_config_rgeti(f->r, H2_CONF_PUSH) == 0 |
| && h2_config_sgeti(f->r->server, H2_CONF_PUSH) != 0) { |
| /* location configuration turns off H2 PUSH handling */ |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, f->c, |
| "h2_c2_filter_notes_out, turning PUSH off"); |
| apr_table_setn(resp->notes, H2_PUSH_MODE_NOTE, "0"); |
| } |
| } |
| } |
| pass: |
| return ap_pass_brigade(f->next, bb); |
| } |
| |
| apr_status_t h2_c2_filter_request_in(ap_filter_t *f, |
| apr_bucket_brigade *bb, |
| ap_input_mode_t mode, |
| apr_read_type_e block, |
| apr_off_t readbytes) |
| { |
| h2_conn_ctx_t *conn_ctx; |
| apr_bucket *b; |
| |
| /* just get out of the way for things we don't want to handle. */ |
| if (mode != AP_MODE_READBYTES && mode != AP_MODE_GETLINE) { |
| return ap_get_brigade(f->next, bb, mode, block, readbytes); |
| } |
| |
| /* This filter is a one-time wonder */ |
| ap_remove_input_filter(f); |
| |
| if (f->c->master && (conn_ctx = h2_conn_ctx_get(f->c)) && conn_ctx->stream_id) { |
| if (conn_ctx->request->http_status != H2_HTTP_STATUS_UNSET) { |
| /* error was encountered preparing this request */ |
| b = ap_bucket_error_create(conn_ctx->request->http_status, NULL, f->r->pool, |
| f->c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| return APR_SUCCESS; |
| } |
| b = h2_request_create_bucket(conn_ctx->request, f->r); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| if (!conn_ctx->beam_in) { |
| b = apr_bucket_eos_create(f->c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| } |
| return APR_SUCCESS; |
| } |
| |
| return ap_get_brigade(f->next, bb, mode, block, readbytes); |
| } |
| |
| #else /* AP_HAS_RESPONSE_BUCKETS */ |
| |
| #define H2_FILTER_LOG(name, c, level, rv, msg, bb) \ |
| do { \ |
| if (APLOG_C_IS_LEVEL((c),(level))) { \ |
| char buffer[4 * 1024]; \ |
| apr_size_t len, bmax = sizeof(buffer)/sizeof(buffer[0]); \ |
| len = h2_util_bb_print(buffer, bmax, "", "", (bb)); \ |
| ap_log_cerror(APLOG_MARK, (level), rv, (c), \ |
| "FILTER[%s]: %s %s", \ |
| (name), (msg), len? buffer : ""); \ |
| } \ |
| } while (0) |
| |
| |
| /* This routine is called by apr_table_do and merges all instances of |
| * the passed field values into a single array that will be further |
| * processed by some later routine. Originally intended to help split |
| * and recombine multiple Vary fields, though it is generic to any field |
| * consisting of comma/space-separated tokens. |
| */ |
| static int uniq_field_values(void *d, const char *key, const char *val) |
| { |
| apr_array_header_t *values; |
| char *start; |
| char *e; |
| char **strpp; |
| int i; |
| |
| (void)key; |
| values = (apr_array_header_t *)d; |
| |
| e = apr_pstrdup(values->pool, val); |
| |
| do { |
| /* Find a non-empty fieldname */ |
| |
| while (*e == ',' || apr_isspace(*e)) { |
| ++e; |
| } |
| if (*e == '\0') { |
| break; |
| } |
| start = e; |
| while (*e != '\0' && *e != ',' && !apr_isspace(*e)) { |
| ++e; |
| } |
| if (*e != '\0') { |
| *e++ = '\0'; |
| } |
| |
| /* Now add it to values if it isn't already represented. |
| * Could be replaced by a ap_array_strcasecmp() if we had one. |
| */ |
| for (i = 0, strpp = (char **) values->elts; i < values->nelts; |
| ++i, ++strpp) { |
| if (*strpp && apr_strnatcasecmp(*strpp, start) == 0) { |
| break; |
| } |
| } |
| if (i == values->nelts) { /* if not found */ |
| *(char **)apr_array_push(values) = start; |
| } |
| } while (*e != '\0'); |
| |
| return 1; |
| } |
| |
| /* |
| * Since some clients choke violently on multiple Vary fields, or |
| * Vary fields with duplicate tokens, combine any multiples and remove |
| * any duplicates. |
| */ |
| static void fix_vary(request_rec *r) |
| { |
| apr_array_header_t *varies; |
| |
| varies = apr_array_make(r->pool, 5, sizeof(char *)); |
| |
| /* Extract all Vary fields from the headers_out, separate each into |
| * its comma-separated fieldname values, and then add them to varies |
| * if not already present in the array. |
| */ |
| apr_table_do(uniq_field_values, varies, r->headers_out, "Vary", NULL); |
| |
| /* If we found any, replace old Vary fields with unique-ified value */ |
| |
| if (varies->nelts > 0) { |
| apr_table_setn(r->headers_out, "Vary", |
| apr_array_pstrcat(r->pool, varies, ',')); |
| } |
| } |
| |
| static h2_headers *create_response(request_rec *r) |
| { |
| const char *clheader; |
| const char *ctype; |
| |
| /* |
| * Now that we are ready to send a response, we need to combine the two |
| * header field tables into a single table. If we don't do this, our |
| * later attempts to set or unset a given fieldname might be bypassed. |
| */ |
| if (!apr_is_empty_table(r->err_headers_out)) { |
| r->headers_out = apr_table_overlay(r->pool, r->err_headers_out, |
| r->headers_out); |
| apr_table_clear(r->err_headers_out); |
| } |
| |
| /* |
| * Remove the 'Vary' header field if the client can't handle it. |
| * Since this will have nasty effects on HTTP/1.1 caches, force |
| * the response into HTTP/1.0 mode. |
| */ |
| if (apr_table_get(r->subprocess_env, "force-no-vary") != NULL) { |
| apr_table_unset(r->headers_out, "Vary"); |
| r->proto_num = HTTP_VERSION(1,0); |
| apr_table_setn(r->subprocess_env, "force-response-1.0", "1"); |
| } |
| else { |
| fix_vary(r); |
| } |
| |
| /* |
| * Now remove any ETag response header field if earlier processing |
| * says so (such as a 'FileETag None' directive). |
| */ |
| if (apr_table_get(r->notes, "no-etag") != NULL) { |
| apr_table_unset(r->headers_out, "ETag"); |
| } |
| |
| /* determine the protocol and whether we should use keepalives. */ |
| ap_set_keepalive(r); |
| |
| if (AP_STATUS_IS_HEADER_ONLY(r->status)) { |
| apr_table_unset(r->headers_out, "Transfer-Encoding"); |
| apr_table_unset(r->headers_out, "Content-Length"); |
| r->content_type = r->content_encoding = NULL; |
| r->content_languages = NULL; |
| r->clength = r->chunked = 0; |
| } |
| else if (r->chunked) { |
| apr_table_mergen(r->headers_out, "Transfer-Encoding", "chunked"); |
| apr_table_unset(r->headers_out, "Content-Length"); |
| } |
| |
| ctype = ap_make_content_type(r, r->content_type); |
| if (ctype) { |
| apr_table_setn(r->headers_out, "Content-Type", ctype); |
| } |
| |
| if (r->content_encoding) { |
| apr_table_setn(r->headers_out, "Content-Encoding", |
| r->content_encoding); |
| } |
| |
| if (!apr_is_empty_array(r->content_languages)) { |
| int i; |
| char *token; |
| char **languages = (char **)(r->content_languages->elts); |
| const char *field = apr_table_get(r->headers_out, "Content-Language"); |
| |
| while (field && (token = ap_get_list_item(r->pool, &field)) != NULL) { |
| for (i = 0; i < r->content_languages->nelts; ++i) { |
| if (!apr_strnatcasecmp(token, languages[i])) |
| break; |
| } |
| if (i == r->content_languages->nelts) { |
| *((char **) apr_array_push(r->content_languages)) = token; |
| } |
| } |
| |
| field = apr_array_pstrcat(r->pool, r->content_languages, ','); |
| apr_table_setn(r->headers_out, "Content-Language", field); |
| } |
| |
| /* |
| * Control cachability for non-cachable responses if not already set by |
| * some other part of the server configuration. |
| */ |
| if (r->no_cache && !apr_table_get(r->headers_out, "Expires")) { |
| char *date = apr_palloc(r->pool, APR_RFC822_DATE_LEN); |
| ap_recent_rfc822_date(date, r->request_time); |
| apr_table_add(r->headers_out, "Expires", date); |
| } |
| |
| /* This is a hack, but I can't find anyway around it. The idea is that |
| * we don't want to send out 0 Content-Lengths if it is a head request. |
| * This happens when modules try to outsmart the server, and return |
| * if they see a HEAD request. Apache 1.3 handlers were supposed to |
| * just return in that situation, and the core handled the HEAD. In |
| * 2.0, if a handler returns, then the core sends an EOS bucket down |
| * the filter stack, and the content-length filter computes a C-L of |
| * zero and that gets put in the headers, and we end up sending a |
| * zero C-L to the client. We can't just remove the C-L filter, |
| * because well behaved 2.0 handlers will send their data down the stack, |
| * and we will compute a real C-L for the head request. RBB |
| */ |
| if (r->header_only |
| && (clheader = apr_table_get(r->headers_out, "Content-Length")) |
| && !strcmp(clheader, "0")) { |
| apr_table_unset(r->headers_out, "Content-Length"); |
| } |
| |
| /* |
| * keep the set-by-proxy server and date headers, otherwise |
| * generate a new server header / date header |
| */ |
| if (r->proxyreq == PROXYREQ_NONE |
| || !apr_table_get(r->headers_out, "Date")) { |
| char *date = apr_palloc(r->pool, APR_RFC822_DATE_LEN); |
| ap_recent_rfc822_date(date, r->request_time); |
| apr_table_setn(r->headers_out, "Date", date ); |
| } |
| if (r->proxyreq == PROXYREQ_NONE |
| || !apr_table_get(r->headers_out, "Server")) { |
| const char *us = ap_get_server_banner(); |
| if (us && *us) { |
| apr_table_setn(r->headers_out, "Server", us); |
| } |
| } |
| |
| return h2_headers_rcreate(r, r->status, r->headers_out, r->pool); |
| } |
| |
| typedef enum { |
| H2_RP_STATUS_LINE, |
| H2_RP_HEADER_LINE, |
| H2_RP_DONE |
| } h2_rp_state_t; |
| |
| typedef struct h2_response_parser h2_response_parser; |
| struct h2_response_parser { |
| const char *id; |
| h2_rp_state_t state; |
| conn_rec *c; |
| apr_pool_t *pool; |
| int http_status; |
| apr_array_header_t *hlines; |
| apr_bucket_brigade *tmp; |
| apr_bucket_brigade *saveto; |
| }; |
| |
| static apr_status_t parse_header(h2_response_parser *parser, char *line) { |
| const char *hline; |
| if (line[0] == ' ' || line[0] == '\t') { |
| char **plast; |
| /* continuation line from the header before this */ |
| while (line[0] == ' ' || line[0] == '\t') { |
| ++line; |
| } |
| |
| plast = apr_array_pop(parser->hlines); |
| if (plast == NULL) { |
| /* not well formed */ |
| return APR_EINVAL; |
| } |
| hline = apr_psprintf(parser->pool, "%s %s", *plast, line); |
| } |
| else { |
| /* new header line */ |
| hline = apr_pstrdup(parser->pool, line); |
| } |
| APR_ARRAY_PUSH(parser->hlines, const char*) = hline; |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t get_line(h2_response_parser *parser, apr_bucket_brigade *bb, |
| char *line, apr_size_t len) |
| { |
| apr_status_t status; |
| |
| if (!parser->tmp) { |
| parser->tmp = apr_brigade_create(parser->pool, parser->c->bucket_alloc); |
| } |
| status = apr_brigade_split_line(parser->tmp, bb, APR_BLOCK_READ, |
| len); |
| if (status == APR_SUCCESS) { |
| --len; |
| status = apr_brigade_flatten(parser->tmp, line, &len); |
| if (status == APR_SUCCESS) { |
| /* we assume a non-0 containing line and remove trailing crlf. */ |
| line[len] = '\0'; |
| /* |
| * XXX: What to do if there is an LF but no CRLF? |
| * Should we error out? |
| */ |
| if (len >= 2 && !strcmp(H2_CRLF, line + len - 2)) { |
| len -= 2; |
| line[len] = '\0'; |
| apr_brigade_cleanup(parser->tmp); |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, parser->c, |
| "h2_c2(%s): read response line: %s", |
| parser->id, line); |
| } |
| else { |
| apr_off_t brigade_length; |
| |
| /* |
| * If the brigade parser->tmp becomes longer than our buffer |
| * for flattening we never have a chance to get a complete |
| * line. This can happen if we are called multiple times after |
| * previous calls did not find a H2_CRLF and we returned |
| * APR_EAGAIN. In this case parser->tmp (correctly) grows |
| * with each call to apr_brigade_split_line. |
| * |
| * XXX: Currently a stack based buffer of HUGE_STRING_LEN is |
| * used. This means we cannot cope with lines larger than |
| * HUGE_STRING_LEN which might be an issue. |
| */ |
| status = apr_brigade_length(parser->tmp, 0, &brigade_length); |
| if ((status != APR_SUCCESS) || (brigade_length > (apr_off_t)len)) { |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, parser->c, APLOGNO(10257) |
| "h2_c2(%s): read response, line too long", |
| parser->id); |
| return APR_ENOSPC; |
| } |
| /* this does not look like a complete line yet */ |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, parser->c, |
| "h2_c2(%s): read response, incomplete line: %s", |
| parser->id, line); |
| if (!parser->saveto) { |
| parser->saveto = apr_brigade_create(parser->pool, |
| parser->c->bucket_alloc); |
| } |
| /* |
| * Be on the save side and save the parser->tmp brigade |
| * as it could contain transient buckets which could be |
| * invalid next time we are here. |
| * |
| * NULL for the filter parameter is ok since we |
| * provide our own brigade as second parameter |
| * and ap_save_brigade does not need to create one. |
| */ |
| ap_save_brigade(NULL, &(parser->saveto), &(parser->tmp), |
| parser->tmp->p); |
| APR_BRIGADE_CONCAT(parser->tmp, parser->saveto); |
| return APR_EAGAIN; |
| } |
| } |
| } |
| apr_brigade_cleanup(parser->tmp); |
| return status; |
| } |
| |
| static apr_table_t *make_table(h2_response_parser *parser) |
| { |
| apr_array_header_t *hlines = parser->hlines; |
| if (hlines) { |
| apr_table_t *headers = apr_table_make(parser->pool, hlines->nelts); |
| int i; |
| |
| for (i = 0; i < hlines->nelts; ++i) { |
| char *hline = ((char **)hlines->elts)[i]; |
| char *sep = ap_strchr(hline, ':'); |
| if (!sep) { |
| ap_log_cerror(APLOG_MARK, APLOG_WARNING, APR_EINVAL, parser->c, |
| APLOGNO(02955) "h2_c2(%s): invalid header[%d] '%s'", |
| parser->id, i, (char*)hline); |
| /* not valid format, abort */ |
| return NULL; |
| } |
| (*sep++) = '\0'; |
| while (*sep == ' ' || *sep == '\t') { |
| ++sep; |
| } |
| |
| if (!h2_util_ignore_resp_header(hline)) { |
| apr_table_merge(headers, hline, sep); |
| } |
| } |
| return headers; |
| } |
| else { |
| return apr_table_make(parser->pool, 0); |
| } |
| } |
| |
| static apr_status_t pass_response(h2_conn_ctx_t *conn_ctx, ap_filter_t *f, |
| h2_response_parser *parser) |
| { |
| apr_bucket *b; |
| apr_status_t status; |
| |
| h2_headers *response = h2_headers_create(parser->http_status, |
| make_table(parser), |
| NULL, 0, parser->pool); |
| apr_brigade_cleanup(parser->tmp); |
| b = h2_bucket_headers_create(parser->c->bucket_alloc, response); |
| APR_BRIGADE_INSERT_TAIL(parser->tmp, b); |
| b = apr_bucket_flush_create(parser->c->bucket_alloc); |
| APR_BRIGADE_INSERT_TAIL(parser->tmp, b); |
| status = ap_pass_brigade(f->next, parser->tmp); |
| apr_brigade_cleanup(parser->tmp); |
| |
| /* reset parser for possible next response */ |
| parser->state = H2_RP_STATUS_LINE; |
| apr_array_clear(parser->hlines); |
| |
| if (response->status >= 200) { |
| conn_ctx->has_final_response = 1; |
| } |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, parser->c, |
| APLOGNO(03197) "h2_c2(%s): passed response %d", |
| parser->id, response->status); |
| return status; |
| } |
| |
| static apr_status_t parse_status(h2_response_parser *parser, char *line) |
| { |
| int sindex = (apr_date_checkmask(line, "HTTP/#.# ###*")? 9 : |
| (apr_date_checkmask(line, "HTTP/# ###*")? 7 : 0)); |
| if (sindex > 0) { |
| int k = sindex + 3; |
| char keepchar = line[k]; |
| line[k] = '\0'; |
| parser->http_status = atoi(&line[sindex]); |
| line[k] = keepchar; |
| parser->state = H2_RP_HEADER_LINE; |
| |
| return APR_SUCCESS; |
| } |
| /* Seems like there is garbage on the connection. May be a leftover |
| * from a previous proxy request. |
| * This should only happen if the H2_RESPONSE filter is not yet in |
| * place (post_read_request has not been reached and the handler wants |
| * to write something. Probably just the interim response we are |
| * waiting for. But if there is other data hanging around before |
| * that, this needs to fail. */ |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, parser->c, APLOGNO(03467) |
| "h2_c2(%s): unable to parse status line: %s", |
| parser->id, line); |
| return APR_EINVAL; |
| } |
| |
| static apr_status_t parse_response(h2_response_parser *parser, |
| h2_conn_ctx_t *conn_ctx, |
| ap_filter_t* f, apr_bucket_brigade *bb) |
| { |
| char line[HUGE_STRING_LEN]; |
| apr_status_t status = APR_SUCCESS; |
| |
| while (!APR_BRIGADE_EMPTY(bb) && status == APR_SUCCESS) { |
| switch (parser->state) { |
| case H2_RP_STATUS_LINE: |
| case H2_RP_HEADER_LINE: |
| status = get_line(parser, bb, line, sizeof(line)); |
| if (status == APR_EAGAIN) { |
| /* need more data */ |
| return APR_SUCCESS; |
| } |
| else if (status != APR_SUCCESS) { |
| return status; |
| } |
| if (parser->state == H2_RP_STATUS_LINE) { |
| /* instead of parsing, just take it directly */ |
| status = parse_status(parser, line); |
| } |
| else if (line[0] == '\0') { |
| /* end of headers, pass response onward */ |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, parser->c, |
| "h2_c2(%s): end of response", parser->id); |
| return pass_response(conn_ctx, f, parser); |
| } |
| else { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, parser->c, |
| "h2_c2(%s): response header %s", parser->id, line); |
| status = parse_header(parser, line); |
| } |
| break; |
| |
| default: |
| return status; |
| } |
| } |
| return status; |
| } |
| |
| apr_status_t h2_c2_filter_catch_h1_out(ap_filter_t* f, apr_bucket_brigade* bb) |
| { |
| h2_conn_ctx_t *conn_ctx = h2_conn_ctx_get(f->c); |
| h2_response_parser *parser = f->ctx; |
| apr_status_t rv; |
| |
| ap_assert(conn_ctx); |
| H2_FILTER_LOG("c2_catch_h1_out", f->c, APLOG_TRACE2, 0, "check", bb); |
| |
| if (!conn_ctx->has_final_response) { |
| if (!parser) { |
| parser = apr_pcalloc(f->c->pool, sizeof(*parser)); |
| parser->id = apr_psprintf(f->c->pool, "%s-%d", conn_ctx->id, conn_ctx->stream_id); |
| parser->pool = f->c->pool; |
| parser->c = f->c; |
| parser->state = H2_RP_STATUS_LINE; |
| parser->hlines = apr_array_make(parser->pool, 10, sizeof(char *)); |
| f->ctx = parser; |
| } |
| |
| if (!APR_BRIGADE_EMPTY(bb)) { |
| apr_bucket *b = APR_BRIGADE_FIRST(bb); |
| if (AP_BUCKET_IS_EOR(b)) { |
| /* TODO: Yikes, this happens when errors are encountered on input |
| * before anything from the repsonse has been processed. The |
| * ap_die_r() call will do nothing in certain conditions. |
| */ |
| int result = ap_map_http_request_error(conn_ctx->last_err, |
| HTTP_INTERNAL_SERVER_ERROR); |
| request_rec *r = h2_create_request_rec(conn_ctx->request, f->c, 1); |
| ap_die((result >= 400)? result : HTTP_INTERNAL_SERVER_ERROR, r); |
| b = ap_bucket_eor_create(f->c->bucket_alloc, r); |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| } |
| } |
| /* There are cases where we need to parse a serialized http/1.1 response. |
| * One example is a 100-continue answer via a mod_proxy setup. */ |
| while (bb && !f->c->aborted && !conn_ctx->has_final_response) { |
| rv = parse_response(parser, conn_ctx, f, bb); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, rv, f->c, |
| "h2_c2(%s): parsed response", parser->id); |
| if (APR_BRIGADE_EMPTY(bb) || APR_SUCCESS != rv) { |
| return rv; |
| } |
| } |
| } |
| |
| return ap_pass_brigade(f->next, bb); |
| } |
| |
| apr_status_t h2_c2_filter_response_out(ap_filter_t *f, apr_bucket_brigade *bb) |
| { |
| h2_conn_ctx_t *conn_ctx = h2_conn_ctx_get(f->c); |
| request_rec *r = f->r; |
| apr_bucket *b, *bresp, *body_bucket = NULL, *next; |
| ap_bucket_error *eb = NULL; |
| h2_headers *response = NULL; |
| int headers_passing = 0; |
| |
| H2_FILTER_LOG("c2_response_out", f->c, APLOG_TRACE1, 0, "called with", bb); |
| |
| if (f->c->aborted || !conn_ctx || conn_ctx->has_final_response) { |
| return ap_pass_brigade(f->next, bb); |
| } |
| |
| if (!conn_ctx->has_final_response) { |
| /* check, if we need to send the response now. Until we actually |
| * see a DATA bucket or some EOS/EOR, we do not do so. */ |
| for (b = APR_BRIGADE_FIRST(bb); |
| b != APR_BRIGADE_SENTINEL(bb); |
| b = APR_BUCKET_NEXT(b)) |
| { |
| if (AP_BUCKET_IS_ERROR(b) && !eb) { |
| eb = b->data; |
| } |
| else if (AP_BUCKET_IS_EOC(b)) { |
| /* If we see an EOC bucket it is a signal that we should get out |
| * of the way doing nothing. |
| */ |
| ap_remove_output_filter(f); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, f->c, |
| "h2_c2(%s): eoc bucket passed", conn_ctx->id); |
| return ap_pass_brigade(f->next, bb); |
| } |
| else if (H2_BUCKET_IS_HEADERS(b)) { |
| headers_passing = 1; |
| } |
| else if (!APR_BUCKET_IS_FLUSH(b)) { |
| body_bucket = b; |
| break; |
| } |
| } |
| |
| if (eb) { |
| int st = eb->status; |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c, APLOGNO(03047) |
| "h2_c2(%s): err bucket status=%d", |
| conn_ctx->id, st); |
| /* throw everything away and replace it with the error response |
| * generated by ap_die() */ |
| apr_brigade_cleanup(bb); |
| ap_die(st, r); |
| return AP_FILTER_ERROR; |
| } |
| |
| if (body_bucket || !headers_passing) { |
| /* time to insert the response bucket before the body or if |
| * no h2_headers is passed, e.g. the response is empty */ |
| response = create_response(r); |
| if (response == NULL) { |
| ap_log_cerror(APLOG_MARK, APLOG_NOTICE, 0, f->c, APLOGNO(03048) |
| "h2_c2(%s): unable to create response", conn_ctx->id); |
| return APR_ENOMEM; |
| } |
| |
| bresp = h2_bucket_headers_create(f->c->bucket_alloc, response); |
| if (body_bucket) { |
| APR_BUCKET_INSERT_BEFORE(body_bucket, bresp); |
| } |
| else { |
| APR_BRIGADE_INSERT_HEAD(bb, bresp); |
| } |
| conn_ctx->has_final_response = 1; |
| r->sent_bodyct = 1; |
| ap_remove_output_filter_byhandle(f->r->output_filters, "H2_C2_NET_CATCH_H1"); |
| } |
| } |
| |
| if (r->header_only || AP_STATUS_IS_HEADER_ONLY(r->status)) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, f->c, |
| "h2_c2(%s): headers only, cleanup output brigade", conn_ctx->id); |
| b = body_bucket? body_bucket : APR_BRIGADE_FIRST(bb); |
| while (b != APR_BRIGADE_SENTINEL(bb)) { |
| next = APR_BUCKET_NEXT(b); |
| if (APR_BUCKET_IS_EOS(b) || AP_BUCKET_IS_EOR(b)) { |
| break; |
| } |
| if (!H2_BUCKET_IS_HEADERS(b)) { |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| } |
| b = next; |
| } |
| } |
| if (conn_ctx->has_final_response) { |
| /* lets get out of the way, our task is done */ |
| ap_remove_output_filter(f); |
| } |
| return ap_pass_brigade(f->next, bb); |
| } |
| |
| |
| struct h2_chunk_filter_t { |
| const char *id; |
| int eos_chunk_added; |
| apr_bucket_brigade *bbchunk; |
| apr_off_t chunked_total; |
| }; |
| typedef struct h2_chunk_filter_t h2_chunk_filter_t; |
| |
| |
| static void make_chunk(conn_rec *c, h2_chunk_filter_t *fctx, apr_bucket_brigade *bb, |
| apr_bucket *first, apr_off_t chunk_len, |
| apr_bucket *tail) |
| { |
| /* Surround the buckets [first, tail[ with new buckets carrying the |
| * HTTP/1.1 chunked encoding format. If tail is NULL, the chunk extends |
| * to the end of the brigade. */ |
| char buffer[128]; |
| apr_bucket *b; |
| apr_size_t len; |
| |
| len = (apr_size_t)apr_snprintf(buffer, H2_ALEN(buffer), |
| "%"APR_UINT64_T_HEX_FMT"\r\n", (apr_uint64_t)chunk_len); |
| b = apr_bucket_heap_create(buffer, len, NULL, bb->bucket_alloc); |
| APR_BUCKET_INSERT_BEFORE(first, b); |
| b = apr_bucket_immortal_create("\r\n", 2, bb->bucket_alloc); |
| if (tail) { |
| APR_BUCKET_INSERT_BEFORE(tail, b); |
| } |
| else { |
| APR_BRIGADE_INSERT_TAIL(bb, b); |
| } |
| fctx->chunked_total += chunk_len; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "h2_c2(%s): added chunk %ld, total %ld", |
| fctx->id, (long)chunk_len, (long)fctx->chunked_total); |
| } |
| |
| static int ser_header(void *ctx, const char *name, const char *value) |
| { |
| apr_bucket_brigade *bb = ctx; |
| apr_brigade_printf(bb, NULL, NULL, "%s: %s\r\n", name, value); |
| return 1; |
| } |
| |
| static apr_status_t read_and_chunk(ap_filter_t *f, h2_conn_ctx_t *conn_ctx, |
| apr_read_type_e block) { |
| h2_chunk_filter_t *fctx = f->ctx; |
| request_rec *r = f->r; |
| apr_status_t status = APR_SUCCESS; |
| |
| if (!fctx->bbchunk) { |
| fctx->bbchunk = apr_brigade_create(r->pool, f->c->bucket_alloc); |
| } |
| |
| if (APR_BRIGADE_EMPTY(fctx->bbchunk)) { |
| apr_bucket *b, *next, *first_data = NULL; |
| apr_bucket_brigade *tmp; |
| apr_off_t bblen = 0; |
| |
| /* get more data from the lower layer filters. Always do this |
| * in larger pieces, since we handle the read modes ourself. */ |
| status = ap_get_brigade(f->next, fctx->bbchunk, |
| AP_MODE_READBYTES, block, conn_ctx->mplx->stream_max_mem); |
| if (status != APR_SUCCESS) { |
| return status; |
| } |
| |
| for (b = APR_BRIGADE_FIRST(fctx->bbchunk); |
| b != APR_BRIGADE_SENTINEL(fctx->bbchunk); |
| b = next) { |
| next = APR_BUCKET_NEXT(b); |
| if (APR_BUCKET_IS_METADATA(b)) { |
| if (first_data) { |
| make_chunk(f->c, fctx, fctx->bbchunk, first_data, bblen, b); |
| first_data = NULL; |
| } |
| |
| if (H2_BUCKET_IS_HEADERS(b)) { |
| h2_headers *headers = h2_bucket_headers_get(b); |
| |
| ap_assert(headers); |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, |
| "h2_c2(%s-%d): receiving trailers", |
| conn_ctx->id, conn_ctx->stream_id); |
| tmp = apr_brigade_split_ex(fctx->bbchunk, b, NULL); |
| if (!apr_is_empty_table(headers->headers)) { |
| status = apr_brigade_puts(fctx->bbchunk, NULL, NULL, "0\r\n"); |
| apr_table_do(ser_header, fctx->bbchunk, headers->headers, NULL); |
| status = apr_brigade_puts(fctx->bbchunk, NULL, NULL, "\r\n"); |
| } |
| else { |
| status = apr_brigade_puts(fctx->bbchunk, NULL, NULL, "0\r\n\r\n"); |
| } |
| r->trailers_in = apr_table_clone(r->pool, headers->headers); |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| APR_BRIGADE_CONCAT(fctx->bbchunk, tmp); |
| apr_brigade_destroy(tmp); |
| fctx->eos_chunk_added = 1; |
| } |
| else if (APR_BUCKET_IS_EOS(b)) { |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, |
| "h2_c2(%s-%d): receiving eos", |
| conn_ctx->id, conn_ctx->stream_id); |
| if (!fctx->eos_chunk_added) { |
| tmp = apr_brigade_split_ex(fctx->bbchunk, b, NULL); |
| status = apr_brigade_puts(fctx->bbchunk, NULL, NULL, "0\r\n\r\n"); |
| APR_BRIGADE_CONCAT(fctx->bbchunk, tmp); |
| apr_brigade_destroy(tmp); |
| } |
| fctx->eos_chunk_added = 0; |
| } |
| } |
| else if (b->length == 0) { |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| } |
| else { |
| if (!first_data) { |
| first_data = b; |
| bblen = 0; |
| } |
| bblen += b->length; |
| } |
| } |
| |
| if (first_data) { |
| make_chunk(f->c, fctx, fctx->bbchunk, first_data, bblen, NULL); |
| } |
| } |
| return status; |
| } |
| |
| apr_status_t h2_c2_filter_request_in(ap_filter_t* f, |
| apr_bucket_brigade* bb, |
| ap_input_mode_t mode, |
| apr_read_type_e block, |
| apr_off_t readbytes) |
| { |
| h2_conn_ctx_t *conn_ctx = h2_conn_ctx_get(f->c); |
| h2_chunk_filter_t *fctx = f->ctx; |
| request_rec *r = f->r; |
| apr_status_t status = APR_SUCCESS; |
| apr_bucket *b, *next; |
| core_server_config *conf = |
| (core_server_config *) ap_get_module_config(r->server->module_config, |
| &core_module); |
| ap_assert(conn_ctx); |
| |
| if (!fctx) { |
| fctx = apr_pcalloc(r->pool, sizeof(*fctx)); |
| fctx->id = apr_psprintf(r->pool, "%s-%d", conn_ctx->id, conn_ctx->stream_id); |
| f->ctx = fctx; |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, f->r, |
| "h2_c2(%s-%d): request input, mode=%d, block=%d, " |
| "readbytes=%ld, exp=%d", |
| conn_ctx->id, conn_ctx->stream_id, mode, block, |
| (long)readbytes, r->expecting_100); |
| if (!conn_ctx->input_chunked) { |
| status = ap_get_brigade(f->next, bb, mode, block, readbytes); |
| /* pipe data through, just take care of trailers */ |
| for (b = APR_BRIGADE_FIRST(bb); |
| b != APR_BRIGADE_SENTINEL(bb); b = next) { |
| next = APR_BUCKET_NEXT(b); |
| if (H2_BUCKET_IS_HEADERS(b)) { |
| h2_headers *headers = h2_bucket_headers_get(b); |
| ap_assert(headers); |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, |
| "h2_c2(%s-%d): receiving trailers", |
| conn_ctx->id, conn_ctx->stream_id); |
| r->trailers_in = headers->headers; |
| if (conf && conf->merge_trailers == AP_MERGE_TRAILERS_ENABLE) { |
| r->headers_in = apr_table_overlay(r->pool, r->headers_in, |
| r->trailers_in); |
| } |
| APR_BUCKET_REMOVE(b); |
| apr_bucket_destroy(b); |
| ap_remove_input_filter(f); |
| |
| if (headers->raw_bytes && h2_c_logio_add_bytes_in) { |
| h2_c_logio_add_bytes_in(f->c, headers->raw_bytes); |
| } |
| break; |
| } |
| } |
| return status; |
| } |
| |
| /* Things are more complicated. The standard HTTP input filter, which |
| * does a lot what we do not want to duplicate, also cares about chunked |
| * transfer encoding and trailers. |
| * We need to simulate chunked encoding for it to be happy. |
| */ |
| if ((status = read_and_chunk(f, conn_ctx, block)) != APR_SUCCESS) { |
| return status; |
| } |
| |
| if (mode == AP_MODE_EXHAUSTIVE) { |
| /* return all we have */ |
| APR_BRIGADE_CONCAT(bb, fctx->bbchunk); |
| } |
| else if (mode == AP_MODE_READBYTES) { |
| status = h2_brigade_concat_length(bb, fctx->bbchunk, readbytes); |
| } |
| else if (mode == AP_MODE_SPECULATIVE) { |
| status = h2_brigade_copy_length(bb, fctx->bbchunk, readbytes); |
| } |
| else if (mode == AP_MODE_GETLINE) { |
| /* we are reading a single LF line, e.g. the HTTP headers. |
| * this has the nasty side effect to split the bucket, even |
| * though it ends with CRLF and creates a 0 length bucket */ |
| status = apr_brigade_split_line(bb, fctx->bbchunk, block, HUGE_STRING_LEN); |
| if (APLOGctrace1(f->c)) { |
| char buffer[1024]; |
| apr_size_t len = sizeof(buffer)-1; |
| apr_brigade_flatten(bb, buffer, &len); |
| buffer[len] = 0; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, f->c, |
| "h2_c2(%s-%d): getline: %s", |
| conn_ctx->id, conn_ctx->stream_id, buffer); |
| } |
| } |
| else { |
| /* Hmm, well. There is mode AP_MODE_EATCRLF, but we chose not |
| * to support it. Seems to work. */ |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_ENOTIMPL, f->c, |
| APLOGNO(02942) |
| "h2_c2, unsupported READ mode %d", mode); |
| status = APR_ENOTIMPL; |
| } |
| |
| h2_util_bb_log(f->c, conn_ctx->stream_id, APLOG_TRACE2, "returning input", bb); |
| return status; |
| } |
| |
| apr_status_t h2_c2_filter_trailers_out(ap_filter_t *f, apr_bucket_brigade *bb) |
| { |
| h2_conn_ctx_t *conn_ctx = h2_conn_ctx_get(f->c); |
| request_rec *r = f->r; |
| apr_bucket *b, *e; |
| |
| if (conn_ctx && r) { |
| /* Detect the EOS/EOR bucket and forward any trailers that may have |
| * been set to our h2_headers. |
| */ |
| for (b = APR_BRIGADE_FIRST(bb); |
| b != APR_BRIGADE_SENTINEL(bb); |
| b = APR_BUCKET_NEXT(b)) |
| { |
| if ((APR_BUCKET_IS_EOS(b) || AP_BUCKET_IS_EOR(b)) |
| && r->trailers_out && !apr_is_empty_table(r->trailers_out)) { |
| h2_headers *headers; |
| apr_table_t *trailers; |
| |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c, APLOGNO(03049) |
| "h2_c2(%s-%d): sending trailers", |
| conn_ctx->id, conn_ctx->stream_id); |
| trailers = apr_table_clone(r->pool, r->trailers_out); |
| headers = h2_headers_rcreate(r, HTTP_OK, trailers, r->pool); |
| e = h2_bucket_headers_create(bb->bucket_alloc, headers); |
| APR_BUCKET_INSERT_BEFORE(b, e); |
| apr_table_clear(r->trailers_out); |
| ap_remove_output_filter(f); |
| break; |
| } |
| } |
| } |
| |
| return ap_pass_brigade(f->next, bb); |
| } |
| |
| #endif /* else #if AP_HAS_RESPONSE_BUCKETS */ |
