Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 187 insertions, 0 deletions

diff --git a/modules/debugging/mod_bucketeer.c b/modules/debugging/mod_bucketeer.c
new file mode 100644
index 0000000..4142cbe
--- /dev/null
+++ b/modules/debugging/mod_bucketeer.c
@@ -0,0 +1,187 @@
+/* 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.
+ */
+
+/*
+ * mod_bucketeer.c: split buckets whenever we find a control-char
+ *
+ * Written by Ian Holsman
+ *
+ */
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "apr_strings.h"
+#include "apr_general.h"
+#include "util_filter.h"
+#include "apr_buckets.h"
+#include "http_request.h"
+#include "http_protocol.h"
+
+static const char bucketeerFilterName[] = "BUCKETEER";
+module AP_MODULE_DECLARE_DATA bucketeer_module;
+
+typedef struct bucketeer_filter_config_t
+{
+    char bucketdelimiter;
+    char passdelimiter;
+    char flushdelimiter;
+} bucketeer_filter_config_t;
+
+
+static void *create_bucketeer_server_config(apr_pool_t *p, server_rec *s)
+{
+    bucketeer_filter_config_t *c = apr_pcalloc(p, sizeof *c);
+
+    c->bucketdelimiter = 0x02; /* ^B */
+    c->passdelimiter = 0x10;   /* ^P */
+    c->flushdelimiter = 0x06;  /* ^F */
+
+    return c;
+}
+
+typedef struct bucketeer_ctx_t
+{
+    apr_bucket_brigade *bb;
+} bucketeer_ctx_t;
+
+static apr_status_t bucketeer_out_filter(ap_filter_t *f,
+                                         apr_bucket_brigade *bb)
+{
+    apr_bucket *e;
+    request_rec *r = f->r;
+    bucketeer_ctx_t *ctx = f->ctx;
+    bucketeer_filter_config_t *c;
+
+    c = ap_get_module_config(r->server->module_config, &bucketeer_module);
+
+    /* If have a context, it means we've done this before successfully. */
+    if (!ctx) {
+        if (!r->content_type || strncmp(r->content_type, "text/", 5)) {
+            ap_remove_output_filter(f);
+            return ap_pass_brigade(f->next, bb);
+        }
+
+        /* We're cool with filtering this. */
+        ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(*ctx));
+        ctx->bb = apr_brigade_create(f->r->pool, f->c->bucket_alloc);
+        apr_table_unset(f->r->headers_out, "Content-Length");
+    }
+
+    for (e = APR_BRIGADE_FIRST(bb);
+         e != APR_BRIGADE_SENTINEL(bb);
+         e = APR_BUCKET_NEXT(e))
+    {
+        const char *data;
+        apr_size_t len, i, lastpos;
+
+        if (APR_BUCKET_IS_EOS(e)) {
+            APR_BUCKET_REMOVE(e);
+            APR_BRIGADE_INSERT_TAIL(ctx->bb, e);
+
+            /* Okay, we've seen the EOS.
+             * Time to pass it along down the chain.
+             */
+            return ap_pass_brigade(f->next, ctx->bb);
+        }
+
+        if (APR_BUCKET_IS_FLUSH(e)) {
+            /*
+             * Ignore flush buckets for the moment..
+             * we decide what to stream
+             */
+            continue;
+        }
+
+        if (APR_BUCKET_IS_METADATA(e)) {
+            /* metadata bucket */
+            apr_bucket *cpy;
+            apr_bucket_copy(e, &cpy);
+            APR_BRIGADE_INSERT_TAIL(ctx->bb, cpy);
+            continue;
+        }
+
+        /* read */
+        apr_bucket_read(e, &data, &len, APR_BLOCK_READ);
+
+        if (len > 0) {
+            lastpos = 0;
+            for (i = 0; i < len; i++) {
+                if (data[i] == c->flushdelimiter ||
+                    data[i] == c->bucketdelimiter ||
+                    data[i] == c->passdelimiter) {
+                    apr_bucket *p;
+                    if (i - lastpos > 0) {
+                        p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
+                                                               &data[lastpos],
+                                                               i - lastpos),
+                                                    i - lastpos,
+                                                    f->r->pool,
+                                                    f->c->bucket_alloc);
+                        APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
+                    }
+                    lastpos = i + 1;
+                    if (data[i] == c->flushdelimiter) {
+                        p = apr_bucket_flush_create(f->c->bucket_alloc);
+                        APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
+                    }
+                    if (data[i] == c->passdelimiter) {
+                        apr_status_t rv;
+
+                        rv = ap_pass_brigade(f->next, ctx->bb);
+                        if (rv) {
+                            return rv;
+                        }
+                    }
+                }
+            }
+            /* XXX: really should append this to the next 'real' bucket */
+            if (lastpos < i) {
+                apr_bucket *p;
+                p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
+                                                       &data[lastpos],
+                                                       i - lastpos),
+                                           i - lastpos,
+                                           f->r->pool,
+                                           f->c->bucket_alloc);
+                lastpos = i;
+                APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
+            }
+        }
+    }
+
+    return APR_SUCCESS;
+}
+
+static void register_hooks(apr_pool_t * p)
+{
+    ap_register_output_filter(bucketeerFilterName, bucketeer_out_filter,
+                              NULL, AP_FTYPE_RESOURCE-1);
+}
+
+static const command_rec bucketeer_filter_cmds[] = {
+    {NULL}
+};
+
+AP_DECLARE_MODULE(bucketeer) = {
+    STANDARD20_MODULE_STUFF,
+    NULL,
+    NULL,
+    create_bucketeer_server_config,
+    NULL,
+    bucketeer_filter_cmds,
+    register_hooks
+};