upload http

JIRA: BOTTLENECK-10

Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>

1 files changed, 548 insertions, 0 deletions

diff --git a/rubbos/app/httpd-2.0.64/modules/http/http_request.c b/rubbos/app/httpd-2.0.64/modules/http/http_request.c
new file mode 100644
index 00000000..c80816d2
--- /dev/null
+++ b/rubbos/app/httpd-2.0.64/modules/http/http_request.c
@@ -0,0 +1,548 @@
+/* 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.
+ */
+
+/*
+ * http_request.c: functions to get and process requests
+ *
+ * Rob McCool 3/21/93
+ *
+ * Thoroughly revamped by rst for Apache.  NB this file reads
+ * best from the bottom up.
+ *
+ */
+
+#include "apr_strings.h"
+#include "apr_file_io.h"
+#include "apr_fnmatch.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#define CORE_PRIVATE
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_request.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "http_log.h"
+#include "http_main.h"
+#include "util_filter.h"
+#include "util_charset.h"
+
+#include "mod_core.h"
+#include "scoreboard.h"
+
+#if APR_HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+
+/*****************************************************************
+ *
+ * Mainline request processing...
+ */
+
+/* XXX A cleaner and faster way to do this might be to pass the request_rec 
+ * down the filter chain as a parameter.  It would need to change for 
+ * subrequest vs. main request filters; perhaps the subrequest filter could 
+ * make the switch.
+ */
+static void update_r_in_filters(ap_filter_t *f, 
+                                request_rec *from,
+                                request_rec *to)
+{
+    while (f) {
+        if (f->r == from) {
+            f->r = to;
+        }
+        f = f->next;
+    }
+}
+
+AP_DECLARE(void) ap_die(int type, request_rec *r)
+{
+    int error_index = ap_index_of_response(type);
+    char *custom_response = ap_response_code_string(r, error_index);
+    int recursive_error = 0;
+    request_rec *r_1st_err = r;
+
+    if (type == AP_FILTER_ERROR) {
+        return;
+    }
+
+    if (type == DONE) {
+        ap_finalize_request_protocol(r);
+        return;
+    }
+
+    /*
+     * The following takes care of Apache redirects to custom response URLs
+     * Note that if we are already dealing with the response to some other
+     * error condition, we just report on the original error, and give up on
+     * any attempt to handle the other thing "intelligently"...
+     */
+    if (r->status != HTTP_OK) {
+        recursive_error = type;
+
+        while (r_1st_err->prev && (r_1st_err->prev->status != HTTP_OK))
+            r_1st_err = r_1st_err->prev;  /* Get back to original error */
+
+        if (r_1st_err != r) {
+            /* The recursive error was caused by an ErrorDocument specifying
+             * an internal redirect to a bad URI.  ap_internal_redirect has
+             * changed the filter chains to point to the ErrorDocument's 
+             * request_rec.  Back out those changes so we can safely use the 
+             * original failing request_rec to send the canned error message.
+             *
+             * ap_send_error_response gets rid of existing resource filters
+             * on the output side, so we can skip those.
+             */
+            update_r_in_filters(r_1st_err->proto_output_filters, r, r_1st_err);
+            update_r_in_filters(r_1st_err->input_filters, r, r_1st_err);
+        }
+
+        custom_response = NULL; /* Do NOT retry the custom thing! */
+    }
+
+    r->status = type;
+
+    /*
+     * This test is done here so that none of the auth modules needs to know
+     * about proxy authentication.  They treat it like normal auth, and then
+     * we tweak the status.
+     */
+    if (HTTP_UNAUTHORIZED == r->status && PROXYREQ_PROXY == r->proxyreq) {
+        r->status = HTTP_PROXY_AUTHENTICATION_REQUIRED;
+    }
+
+    /* If we don't want to keep the connection, make sure we mark that the
+     * connection is not eligible for keepalive.  If we want to keep the
+     * connection, be sure that the request body (if any) has been read.
+     */
+    if (ap_status_drops_connection(r->status)) {
+        r->connection->keepalive = AP_CONN_CLOSE;
+    }
+
+    /*
+     * Two types of custom redirects --- plain text, and URLs. Plain text has
+     * a leading '"', so the URL code, here, is triggered on its absence
+     */
+
+    if (custom_response && custom_response[0] != '"') {
+
+        if (ap_is_url(custom_response)) {
+            /*
+             * The URL isn't local, so lets drop through the rest of this
+             * apache code, and continue with the usual REDIRECT handler.
+             * But note that the client will ultimately see the wrong
+             * status...
+             */
+            r->status = HTTP_MOVED_TEMPORARILY;
+            apr_table_setn(r->headers_out, "Location", custom_response);
+        }
+        else if (custom_response[0] == '/') {
+            const char *error_notes;
+            r->no_local_copy = 1;       /* Do NOT send HTTP_NOT_MODIFIED for
+                                         * error documents! */
+            /*
+             * This redirect needs to be a GET no matter what the original
+             * method was.
+             */
+            apr_table_setn(r->subprocess_env, "REQUEST_METHOD", r->method);
+
+            /*
+             * Provide a special method for modules to communicate
+             * more informative (than the plain canned) messages to us.
+             * Propagate them to ErrorDocuments via the ERROR_NOTES variable:
+             */
+            if ((error_notes = apr_table_get(r->notes, 
+                                             "error-notes")) != NULL) {
+                apr_table_setn(r->subprocess_env, "ERROR_NOTES", error_notes);
+            }
+            r->method = apr_pstrdup(r->pool, "GET");
+            r->method_number = M_GET;
+            ap_internal_redirect(custom_response, r);
+            return;
+        }
+        else {
+            /*
+             * Dumb user has given us a bad url to redirect to --- fake up
+             * dying with a recursive server error...
+             */
+            recursive_error = HTTP_INTERNAL_SERVER_ERROR;
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+                        "Invalid error redirection directive: %s",
+                        custom_response);
+        }
+    }
+    ap_send_error_response(r_1st_err, recursive_error);
+}
+
+static void check_pipeline_flush(request_rec *r)
+{
+    conn_rec *c = r->connection;
+    /* ### if would be nice if we could PEEK without a brigade. that would
+       ### allow us to defer creation of the brigade to when we actually
+       ### need to send a FLUSH. */
+    apr_bucket_brigade *bb = apr_brigade_create(r->pool, c->bucket_alloc);
+
+    /* Flush the filter contents if:
+     *
+     *   1) the connection will be closed
+     *   2) there isn't a request ready to be read
+     */
+    /* ### shouldn't this read from the connection input filters? */
+    /* ### is zero correct? that means "read one line" */
+    if (r->connection->keepalive == AP_CONN_CLOSE || 
+        ap_get_brigade(r->input_filters, bb, AP_MODE_EATCRLF, 
+                       APR_NONBLOCK_READ, 0) != APR_SUCCESS) {
+        apr_bucket *e = apr_bucket_flush_create(c->bucket_alloc);
+
+        /* We just send directly to the connection based filters.  At
+         * this point, we know that we have seen all of the data
+         * (request finalization sent an EOS bucket, which empties all
+         * of the request filters). We just want to flush the buckets
+         * if something hasn't been sent to the network yet.
+         */
+        APR_BRIGADE_INSERT_HEAD(bb, e);
+        ap_pass_brigade(r->connection->output_filters, bb);
+    }
+}
+
+void ap_process_request(request_rec *r)
+{
+    int access_status;
+
+    /* Give quick handlers a shot at serving the request on the fast
+     * path, bypassing all of the other Apache hooks.
+     *
+     * This hook was added to enable serving files out of a URI keyed 
+     * content cache ( e.g., Mike Abbott's Quick Shortcut Cache, 
+     * described here: http://oss.sgi.com/projects/apache/mod_qsc.html )
+     *
+     * It may have other uses as well, such as routing requests directly to
+     * content handlers that have the ability to grok HTTP and do their
+     * own access checking, etc (e.g. servlet engines). 
+     * 
+     * Use this hook with extreme care and only if you know what you are 
+     * doing.
+     */
+    if (ap_extended_status)
+        ap_time_process_request(r->connection->sbh, START_PREQUEST);
+    access_status = ap_run_quick_handler(r, 0);  /* Not a look-up request */
+    if (access_status == DECLINED) {
+        access_status = ap_process_request_internal(r);
+        if (access_status == OK) {
+            access_status = ap_invoke_handler(r);
+        }
+    }
+
+    if (access_status == DONE) {
+        /* e.g., something not in storage like TRACE */
+        access_status = OK;
+    }
+
+    if (access_status == OK) {
+        ap_finalize_request_protocol(r);
+    }
+    else {
+        r->status = HTTP_OK;
+        ap_die(access_status, r);
+    }
+    
+    /*
+     * We want to flush the last packet if this isn't a pipelining connection
+     * *before* we start into logging.  Suppose that the logging causes a DNS
+     * lookup to occur, which may have a high latency.  If we hold off on
+     * this packet, then it'll appear like the link is stalled when really
+     * it's the application that's stalled.
+     */
+    check_pipeline_flush(r);
+    ap_update_child_status(r->connection->sbh, SERVER_BUSY_LOG, r);
+    ap_run_log_transaction(r);
+    if (ap_extended_status)
+        ap_time_process_request(r->connection->sbh, STOP_PREQUEST);
+}
+
+static apr_table_t *rename_original_env(apr_pool_t *p, apr_table_t *t)
+{
+    const apr_array_header_t *env_arr = apr_table_elts(t);
+    const apr_table_entry_t *elts = (const apr_table_entry_t *) env_arr->elts;
+    apr_table_t *new = apr_table_make(p, env_arr->nalloc);
+    int i;
+
+    for (i = 0; i < env_arr->nelts; ++i) {
+        if (!elts[i].key)
+            continue;
+        apr_table_setn(new, apr_pstrcat(p, "REDIRECT_", elts[i].key, NULL),
+                  elts[i].val);
+    }
+
+    return new;
+}
+
+static request_rec *internal_internal_redirect(const char *new_uri,
+                                               request_rec *r) {
+    int access_status;
+    request_rec *new;
+
+    if (ap_is_recursion_limit_exceeded(r)) {
+        ap_die(HTTP_INTERNAL_SERVER_ERROR, r);
+        return NULL;
+    }
+
+    new = (request_rec *) apr_pcalloc(r->pool, sizeof(request_rec));
+
+    new->connection = r->connection;
+    new->server     = r->server;
+    new->pool       = r->pool;
+
+    /*
+     * A whole lot of this really ought to be shared with http_protocol.c...
+     * another missing cleanup.  It's particularly inappropriate to be
+     * setting header_only, etc., here.
+     */
+
+    new->method          = r->method;
+    new->method_number   = r->method_number;
+    new->allowed_methods = ap_make_method_list(new->pool, 2);
+    ap_parse_uri(new, new_uri);
+
+    new->request_config = ap_create_request_config(r->pool);
+
+    new->per_dir_config = r->server->lookup_defaults;
+
+    new->prev = r;
+    r->next   = new;
+
+    /* Must have prev and next pointers set before calling create_request
+     * hook.
+     */
+    ap_run_create_request(new);
+
+    /* Inherit the rest of the protocol info... */
+
+    new->the_request = r->the_request;
+
+    new->allowed         = r->allowed;
+
+    new->status          = r->status;
+    new->assbackwards    = r->assbackwards;
+    new->header_only     = r->header_only;
+    new->protocol        = r->protocol;
+    new->proto_num       = r->proto_num;
+    new->hostname        = r->hostname;
+    new->request_time    = r->request_time;
+    new->main            = r->main;
+
+    new->headers_in      = r->headers_in;
+    new->headers_out     = apr_table_make(r->pool, 12);
+    new->err_headers_out = r->err_headers_out;
+    new->subprocess_env  = rename_original_env(r->pool, r->subprocess_env);
+    new->notes           = apr_table_make(r->pool, 5);
+    new->allowed_methods = ap_make_method_list(new->pool, 2);
+
+    new->htaccess        = r->htaccess;
+    new->no_cache        = r->no_cache;
+    new->expecting_100   = r->expecting_100;
+    new->no_local_copy   = r->no_local_copy;
+    new->read_length     = r->read_length;     /* We can only read it once */
+    new->vlist_validator = r->vlist_validator;
+
+    new->proto_output_filters  = r->proto_output_filters;
+    new->proto_input_filters   = r->proto_input_filters;
+
+    new->output_filters  = new->proto_output_filters;
+    new->input_filters   = new->proto_input_filters;
+
+    if (new->main) {
+        /* Add back the subrequest filter, which we lost when
+         * we set output_filters to include only the protocol
+         * output filters from the original request.
+         */
+        ap_add_output_filter_handle(ap_subreq_core_filter_handle,
+                                    NULL, new, new->connection);
+    }
+    
+    update_r_in_filters(new->input_filters, r, new);
+    update_r_in_filters(new->output_filters, r, new);
+
+    apr_table_setn(new->subprocess_env, "REDIRECT_STATUS",
+                   apr_itoa(r->pool, r->status));
+
+    /*
+     * XXX: hmm.  This is because mod_setenvif and mod_unique_id really need
+     * to do their thing on internal redirects as well.  Perhaps this is a
+     * misnamed function.
+     */
+    if ((access_status = ap_run_post_read_request(new))) {
+        ap_die(access_status, new);
+        return NULL;
+    }
+
+    return new;
+}
+
+/* XXX: Is this function is so bogus and fragile that we deep-6 it? */
+AP_DECLARE(void) ap_internal_fast_redirect(request_rec *rr, request_rec *r)
+{
+    /* We need to tell POOL_DEBUG that we're guaranteeing that rr->pool
+     * will exist as long as r->pool.  Otherwise we run into troubles because
+     * some values in this request will be allocated in r->pool, and others in
+     * rr->pool.
+     */
+    apr_pool_join(r->pool, rr->pool);
+    r->proxyreq = rr->proxyreq;
+    r->no_cache = (r->no_cache && rr->no_cache);
+    r->no_local_copy = (r->no_local_copy && rr->no_local_copy);
+    r->mtime = rr->mtime;
+    r->uri = rr->uri;
+    r->filename = rr->filename;
+    r->canonical_filename = rr->canonical_filename;
+    r->path_info = rr->path_info;
+    r->args = rr->args;
+    r->finfo = rr->finfo;
+    r->handler = rr->handler;
+    ap_set_content_type(r, rr->content_type);
+    r->content_encoding = rr->content_encoding;
+    r->content_languages = rr->content_languages;
+    r->per_dir_config = rr->per_dir_config;
+    /* copy output headers from subrequest, but leave negotiation headers */
+    r->notes = apr_table_overlay(r->pool, rr->notes, r->notes);
+    r->headers_out = apr_table_overlay(r->pool, rr->headers_out,
+                                       r->headers_out);
+    r->err_headers_out = apr_table_overlay(r->pool, rr->err_headers_out,
+                                           r->err_headers_out);
+    r->subprocess_env = apr_table_overlay(r->pool, rr->subprocess_env,
+                                          r->subprocess_env);
+
+    r->output_filters = rr->output_filters;
+    r->input_filters = rr->input_filters;
+
+    if (r->main) {
+        ap_add_output_filter_handle(ap_subreq_core_filter_handle,
+                                    NULL, r, r->connection);
+    }
+    else if (r->output_filters->frec == ap_subreq_core_filter_handle) {
+        ap_remove_output_filter(r->output_filters);
+        r->output_filters = r->output_filters->next;
+    }
+
+    /* If any filters pointed at the now-defunct rr, we must point them
+     * at our "new" instance of r.  In particular, some of rr's structures
+     * will now be bogus (say rr->headers_out).  If a filter tried to modify
+     * their f->r structure when it is pointing to rr, the real request_rec
+     * will not get updated.  Fix that here.
+     */
+    update_r_in_filters(r->input_filters, rr, r);
+    update_r_in_filters(r->output_filters, rr, r);
+}
+
+AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r)
+{
+    request_rec *new = internal_internal_redirect(new_uri, r);
+    int access_status;
+
+    /* ap_die was already called, if an error occured */
+    if (!new) {
+        return;
+    }
+
+    access_status = ap_process_request_internal(new);
+    if (access_status == OK) {
+        if ((access_status = ap_invoke_handler(new)) != 0) {
+            ap_die(access_status, new);
+            return;
+        }
+        ap_finalize_request_protocol(new);
+    }
+    else {
+        ap_die(access_status, new);
+    }
+}
+
+/* This function is designed for things like actions or CGI scripts, when
+ * using AddHandler, and you want to preserve the content type across
+ * an internal redirect.
+ */
+AP_DECLARE(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r)
+{
+    int access_status;
+    request_rec *new = internal_internal_redirect(new_uri, r);
+
+    /* ap_die was already called, if an error occured */
+    if (!new) {
+        return;
+    }
+
+    if (r->handler)
+        ap_set_content_type(new, r->content_type);
+    access_status = ap_process_request_internal(new);
+    if (access_status == OK) {
+        if ((access_status = ap_invoke_handler(new)) != 0) {
+            ap_die(access_status, new);
+            return;
+        }
+        ap_finalize_request_protocol(new);
+    }
+    else {
+        ap_die(access_status, new);
+    }
+}
+
+AP_DECLARE(void) ap_allow_methods(request_rec *r, int reset, ...) 
+{
+    const char *method;
+    va_list methods;
+
+    /*
+     * Get rid of any current settings if requested; not just the
+     * well-known methods but any extensions as well.
+     */
+    if (reset) {
+        ap_clear_method_list(r->allowed_methods);
+    }
+
+    va_start(methods, reset);
+    while ((method = va_arg(methods, const char *)) != NULL) {
+        ap_method_list_add(r->allowed_methods, method);
+    }
+    va_end(methods);
+}
+
+AP_DECLARE(void) ap_allow_standard_methods(request_rec *r, int reset, ...)
+{
+    int method;
+    va_list methods;
+    apr_int64_t mask;
+
+    /*
+     * Get rid of any current settings if requested; not just the
+     * well-known methods but any extensions as well.
+     */
+    if (reset) {
+        ap_clear_method_list(r->allowed_methods);
+    }
+
+    mask = 0;
+    va_start(methods, reset);
+    while ((method = va_arg(methods, int)) != -1) {
+        mask |= (AP_METHOD_BIT << method);
+    }
+    va_end(methods);
+
+    r->allowed_methods->method_mask |= mask;
+}