diff options
Diffstat (limited to 'modules/http2/h2_request.c')
| -rw-r--r-- | modules/http2/h2_request.c | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/modules/http2/h2_request.c b/modules/http2/h2_request.c new file mode 100644 index 0000000..20e94cd --- /dev/null +++ b/modules/http2/h2_request.c @@ -0,0 +1,519 @@ +/* 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 "apr.h" +#include "apr_strings.h" +#include "apr_lib.h" +#include "apr_strmatch.h" + +#include <ap_mmn.h> + +#include <httpd.h> +#include <http_core.h> +#include <http_connection.h> +#include <http_protocol.h> +#include <http_request.h> +#include <http_log.h> +#include <http_ssl.h> +#include <http_vhost.h> +#include <util_filter.h> +#include <ap_mpm.h> +#include <mod_core.h> +#include <scoreboard.h> + +#include "h2_private.h" +#include "h2_config.h" +#include "h2_push.h" +#include "h2_request.h" +#include "h2_util.h" + + +h2_request *h2_request_create(int id, apr_pool_t *pool, const char *method, + const char *scheme, const char *authority, + const char *path, apr_table_t *header) +{ + h2_request *req = apr_pcalloc(pool, sizeof(h2_request)); + + req->method = method; + req->scheme = scheme; + req->authority = authority; + req->path = path; + req->headers = header? header : apr_table_make(pool, 10); + req->request_time = apr_time_now(); + + return req; +} + +typedef struct { + apr_table_t *headers; + apr_pool_t *pool; + apr_status_t status; +} h1_ctx; + +static int set_h1_header(void *ctx, const char *key, const char *value) +{ + h1_ctx *x = ctx; + int was_added; + h2_req_add_header(x->headers, x->pool, key, strlen(key), value, strlen(value), 0, &was_added); + return 1; +} + +apr_status_t h2_request_rcreate(h2_request **preq, apr_pool_t *pool, + request_rec *r) +{ + h2_request *req; + const char *scheme, *authority, *path; + h1_ctx x; + + *preq = NULL; + scheme = apr_pstrdup(pool, r->parsed_uri.scheme? r->parsed_uri.scheme + : ap_http_scheme(r)); + authority = apr_pstrdup(pool, r->hostname); + path = apr_uri_unparse(pool, &r->parsed_uri, APR_URI_UNP_OMITSITEPART); + + if (!r->method || !scheme || !r->hostname || !path) { + return APR_EINVAL; + } + + /* The authority we carry in h2_request is the 'authority' part of + * the URL for the request. r->hostname has stripped any port info that + * might have been present. Do we need to add it? + */ + if (!ap_strchr_c(authority, ':')) { + if (r->parsed_uri.port_str) { + /* Yes, it was there, add it again. */ + authority = apr_pstrcat(pool, authority, ":", r->parsed_uri.port_str, NULL); + } + else if (!r->parsed_uri.hostname && r->server && r->server->port) { + /* If there was no hostname in the parsed URL, the URL was relative. + * In that case, we restore port from our server->port, if it + * is known and not the default port for the scheme. */ + apr_port_t defport = apr_uri_port_of_scheme(scheme); + if (defport != r->server->port) { + /* port info missing and port is not default for scheme: append */ + authority = apr_psprintf(pool, "%s:%d", authority, + (int)r->server->port); + } + } + } + + req = apr_pcalloc(pool, sizeof(*req)); + req->method = apr_pstrdup(pool, r->method); + req->scheme = scheme; + req->authority = authority; + req->path = path; + req->headers = apr_table_make(pool, 10); + req->http_status = H2_HTTP_STATUS_UNSET; + + x.pool = pool; + x.headers = req->headers; + x.status = APR_SUCCESS; + apr_table_do(set_h1_header, &x, r->headers_in, NULL); + + *preq = req; + return x.status; +} + +apr_status_t h2_request_add_header(h2_request *req, apr_pool_t *pool, + const char *name, size_t nlen, + const char *value, size_t vlen, + size_t max_field_len, int *pwas_added) +{ + apr_status_t status = APR_SUCCESS; + + *pwas_added = 0; + if (nlen <= 0) { + return status; + } + + if (name[0] == ':') { + /* pseudo header, see ch. 8.1.2.3, always should come first */ + if (!apr_is_empty_table(req->headers)) { + ap_log_perror(APLOG_MARK, APLOG_ERR, 0, pool, + APLOGNO(02917) + "h2_request: pseudo header after request start"); + return APR_EGENERAL; + } + + if (H2_HEADER_METHOD_LEN == nlen + && !strncmp(H2_HEADER_METHOD, name, nlen)) { + req->method = apr_pstrndup(pool, value, vlen); + } + else if (H2_HEADER_SCHEME_LEN == nlen + && !strncmp(H2_HEADER_SCHEME, name, nlen)) { + req->scheme = apr_pstrndup(pool, value, vlen); + } + else if (H2_HEADER_PATH_LEN == nlen + && !strncmp(H2_HEADER_PATH, name, nlen)) { + req->path = apr_pstrndup(pool, value, vlen); + } + else if (H2_HEADER_AUTH_LEN == nlen + && !strncmp(H2_HEADER_AUTH, name, nlen)) { + req->authority = apr_pstrndup(pool, value, vlen); + } + else { + char buffer[32]; + memset(buffer, 0, 32); + strncpy(buffer, name, (nlen > 31)? 31 : nlen); + ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, pool, + APLOGNO(02954) + "h2_request: ignoring unknown pseudo header %s", + buffer); + } + } + else { + /* non-pseudo header, add to table */ + status = h2_req_add_header(req->headers, pool, name, nlen, value, vlen, + max_field_len, pwas_added); + } + + return status; +} + +apr_status_t h2_request_end_headers(h2_request *req, apr_pool_t *pool, + size_t raw_bytes) +{ + /* rfc7540, ch. 8.1.2.3: without :authority, Host: must be there */ + if (req->authority && !strlen(req->authority)) { + req->authority = NULL; + } + if (!req->authority) { + const char *host = apr_table_get(req->headers, "Host"); + if (!host) { + return APR_BADARG; + } + req->authority = host; + } + else { + apr_table_setn(req->headers, "Host", req->authority); + } + req->raw_bytes += raw_bytes; + + return APR_SUCCESS; +} + +h2_request *h2_request_clone(apr_pool_t *p, const h2_request *src) +{ + h2_request *dst = apr_pmemdup(p, src, sizeof(*dst)); + dst->method = apr_pstrdup(p, src->method); + dst->scheme = apr_pstrdup(p, src->scheme); + dst->authority = apr_pstrdup(p, src->authority); + dst->path = apr_pstrdup(p, src->path); + dst->headers = apr_table_clone(p, src->headers); + return dst; +} + +#if !AP_MODULE_MAGIC_AT_LEAST(20120211, 106) +static request_rec *my_ap_create_request(conn_rec *c) +{ + apr_pool_t *p; + request_rec *r; + + apr_pool_create(&p, c->pool); + apr_pool_tag(p, "request"); + r = apr_pcalloc(p, sizeof(request_rec)); + AP_READ_REQUEST_ENTRY((intptr_t)r, (uintptr_t)c); + r->pool = p; + r->connection = c; + r->server = c->base_server; + + r->user = NULL; + r->ap_auth_type = NULL; + + r->allowed_methods = ap_make_method_list(p, 2); + + r->headers_in = apr_table_make(r->pool, 5); + r->trailers_in = apr_table_make(r->pool, 5); + r->subprocess_env = apr_table_make(r->pool, 25); + r->headers_out = apr_table_make(r->pool, 12); + r->err_headers_out = apr_table_make(r->pool, 5); + r->trailers_out = apr_table_make(r->pool, 5); + r->notes = apr_table_make(r->pool, 5); + + r->request_config = ap_create_request_config(r->pool); + /* Must be set before we run create request hook */ + + r->proto_output_filters = c->output_filters; + r->output_filters = r->proto_output_filters; + r->proto_input_filters = c->input_filters; + r->input_filters = r->proto_input_filters; + ap_run_create_request(r); + r->per_dir_config = r->server->lookup_defaults; + + r->sent_bodyct = 0; /* bytect isn't for body */ + + r->read_length = 0; + r->read_body = REQUEST_NO_BODY; + + r->status = HTTP_OK; /* Until further notice */ + r->header_only = 0; + r->the_request = NULL; + + /* Begin by presuming any module can make its own path_info assumptions, + * until some module interjects and changes the value. + */ + r->used_path_info = AP_REQ_DEFAULT_PATH_INFO; + + r->useragent_addr = c->client_addr; + r->useragent_ip = c->client_ip; + return r; +} +#endif + +#if AP_HAS_RESPONSE_BUCKETS +apr_bucket *h2_request_create_bucket(const h2_request *req, request_rec *r) +{ + conn_rec *c = r->connection; + apr_table_t *headers = apr_table_clone(r->pool, req->headers); + const char *uri = req->path; + + AP_DEBUG_ASSERT(req->authority); + if (req->scheme && (ap_cstr_casecmp(req->scheme, + ap_ssl_conn_is_ssl(c->master? c->master : c)? "https" : "http") + || !ap_cstr_casecmp("CONNECT", req->method))) { + /* Client sent a non-matching ':scheme' pseudo header or CONNECT. + * In this case, we use an absolute URI. + */ + uri = apr_psprintf(r->pool, "%s://%s%s", + req->scheme, req->authority, req->path ? req->path : ""); + } + + return ap_bucket_request_create(req->method, uri, "HTTP/2.0", headers, + r->pool, c->bucket_alloc); +} +#endif + +static void assign_headers(request_rec *r, const h2_request *req, + int no_body) +{ + const char *cl; + + r->headers_in = apr_table_clone(r->pool, req->headers); + if (req->authority) { + /* for internal handling, we have to simulate that :authority + * came in as Host:, RFC 9113 ch. says that mismatches between + * :authority and Host: SHOULD be rejected as malformed. However, + * we are more lenient and just replace any Host: if we have + * an :authority. + */ + const char *orig_host = apr_table_get(req->headers, "Host"); + if (orig_host && strcmp(req->authority, orig_host)) { + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(10401) + "overwriting 'Host: %s' with :authority: %s'", + orig_host, req->authority); + apr_table_setn(r->subprocess_env, "H2_ORIGINAL_HOST", orig_host); + } + apr_table_setn(r->headers_in, "Host", req->authority); + ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, + "set 'Host: %s' from :authority", req->authority); + } + + cl = apr_table_get(req->headers, "Content-Length"); + if (no_body) { + if (!cl && apr_table_get(req->headers, "Content-Type")) { + /* If we have a content-type, but already seen eos, no more + * data will come. Signal a zero content length explicitly. + */ + apr_table_setn(req->headers, "Content-Length", "0"); + } + } +#if !AP_HAS_RESPONSE_BUCKETS + else if (!cl) { + /* there may be a body and we have internal HTTP/1.1 processing. + * If the Content-Length is unspecified, we MUST simulate + * chunked Transfer-Encoding. + * + * HTTP/2 does not need a Content-Length for framing. Ideally + * all clients set the EOS flag on the header frame if they + * do not intent to send a body. However, forwarding proxies + * might just no know at the time and send an empty DATA + * frame with EOS much later. + */ + apr_table_mergen(r->headers_in, "Transfer-Encoding", "chunked"); + } +#endif /* else AP_HAS_RESPONSE_BUCKETS */ +} + +request_rec *h2_create_request_rec(const h2_request *req, conn_rec *c, + int no_body) +{ + int access_status = HTTP_OK; + +#if AP_MODULE_MAGIC_AT_LEAST(20120211, 106) + request_rec *r = ap_create_request(c); +#else + request_rec *r = my_ap_create_request(c); +#endif + +#if AP_MODULE_MAGIC_AT_LEAST(20120211, 107) + assign_headers(r, req, no_body); + ap_run_pre_read_request(r, c); + + /* Time to populate r with the data we have. */ + r->request_time = req->request_time; + AP_DEBUG_ASSERT(req->authority); + if (req->scheme && (ap_cstr_casecmp(req->scheme, + ap_ssl_conn_is_ssl(c->master? c->master : c)? "https" : "http") + || !ap_cstr_casecmp("CONNECT", req->method))) { + /* Client sent a non-matching ':scheme' pseudo header. Forward this + * via an absolute URI in the request line. + */ + r->the_request = apr_psprintf(r->pool, "%s %s://%s%s HTTP/2.0", + req->method, req->scheme, req->authority, + req->path ? req->path : ""); + } + else if (req->path) { + r->the_request = apr_psprintf(r->pool, "%s %s HTTP/2.0", + req->method, req->path); + } + else { + /* We should only come here on a request that is errored already. + * create a request line that passes parsing, we'll die anyway. + */ + AP_DEBUG_ASSERT(req->http_status != H2_HTTP_STATUS_UNSET); + r->the_request = apr_psprintf(r->pool, "%s / HTTP/2.0", req->method); + } + + /* Start with r->hostname = NULL, ap_check_request_header() will get it + * form Host: header, otherwise we get complains about port numbers. + */ + r->hostname = NULL; + + /* Validate HTTP/1 request and select vhost. */ + if (!ap_parse_request_line(r) || !ap_check_request_header(r)) { + /* we may have switched to another server still */ + r->per_dir_config = r->server->lookup_defaults; + if (req->http_status != H2_HTTP_STATUS_UNSET) { + access_status = req->http_status; + /* Be safe and close the connection */ + c->keepalive = AP_CONN_CLOSE; + } + else { + access_status = r->status; + } + r->status = HTTP_OK; + goto die; + } +#else + { + const char *s; + + assign_headers(r, req, no_body); + ap_run_pre_read_request(r, c); + + /* Time to populate r with the data we have. */ + r->request_time = req->request_time; + r->method = apr_pstrdup(r->pool, req->method); + /* Provide quick information about the request method as soon as known */ + r->method_number = ap_method_number_of(r->method); + if (r->method_number == M_GET && r->method[0] == 'H') { + r->header_only = 1; + } + ap_parse_uri(r, req->path ? req->path : ""); + r->protocol = (char*)"HTTP/2.0"; + r->proto_num = HTTP_VERSION(2, 0); + r->the_request = apr_psprintf(r->pool, "%s %s HTTP/2.0", + r->method, req->path ? req->path : ""); + + /* Start with r->hostname = NULL, ap_check_request_header() will get it + * form Host: header, otherwise we get complains about port numbers. + */ + r->hostname = NULL; + ap_update_vhost_from_headers(r); + + /* we may have switched to another server */ + r->per_dir_config = r->server->lookup_defaults; + + s = apr_table_get(r->headers_in, "Expect"); + if (s && s[0]) { + if (ap_cstr_casecmp(s, "100-continue") == 0) { + r->expecting_100 = 1; + } + else { + r->status = HTTP_EXPECTATION_FAILED; + access_status = r->status; + goto die; + } + } + } +#endif + + /* we may have switched to another server */ + r->per_dir_config = r->server->lookup_defaults; + + if (req->http_status != H2_HTTP_STATUS_UNSET) { + access_status = req->http_status; + r->status = HTTP_OK; + /* Be safe and close the connection */ + c->keepalive = AP_CONN_CLOSE; + goto die; + } + + /* + * Add the HTTP_IN filter here to ensure that ap_discard_request_body + * called by ap_die and by ap_send_error_response works correctly on + * status codes that do not cause the connection to be dropped and + * in situations where the connection should be kept alive. + */ + ap_add_input_filter_handle(ap_http_input_filter_handle, + NULL, r, r->connection); + + if ((access_status = ap_post_read_request(r))) { + /* Request check post hooks failed. An example of this would be a + * request for a vhost where h2 is disabled --> 421. + */ + ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03367) + "h2_request: access_status=%d, request_create failed", + access_status); + goto die; + } + + AP_READ_REQUEST_SUCCESS((uintptr_t)r, (char *)r->method, + (char *)r->uri, (char *)r->server->defn_name, + r->status); + return r; + +die: + ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, + "ap_die(%d) for %s", access_status, r->the_request); + ap_die(access_status, r); + + /* ap_die() sent the response through the output filters, we must now + * end the request with an EOR bucket for stream/pipeline accounting. + */ + { + apr_bucket_brigade *eor_bb; +#if AP_MODULE_MAGIC_AT_LEAST(20180905, 1) + eor_bb = ap_acquire_brigade(c); + APR_BRIGADE_INSERT_TAIL(eor_bb, + ap_bucket_eor_create(c->bucket_alloc, r)); + ap_pass_brigade(c->output_filters, eor_bb); + ap_release_brigade(c, eor_bb); +#else + eor_bb = apr_brigade_create(c->pool, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(eor_bb, + ap_bucket_eor_create(c->bucket_alloc, r)); + ap_pass_brigade(c->output_filters, eor_bb); + apr_brigade_destroy(eor_bb); +#endif + } + + r = NULL; + AP_READ_REQUEST_FAILURE((uintptr_t)r); + return NULL; +} |