Github user SolidWallOfCode commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/1210#discussion_r87219292
--- Diff: plugins/experimental/log_requests/log_requests.c ---
@@ -0,0 +1,301 @@
+/** @file
+
+ Logs full request/response headers on an error response code (4xx/5xx)
+
+ @section license License
+
+ 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 <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "ts/ts.h"
+#include "ts/ink_defs.h"
+
+#define PLUGIN_NAME log_requests
+
+// we log the set of errors in {errors} - {blacklist}
+static TSHttpStatus *blacklist;
+static int blacklist_size; // number of entries in blacklist
+static TSHttpStatus errors[] = {TS_HTTP_STATUS_BAD_REQUEST,
+ TS_HTTP_STATUS_UNAUTHORIZED,
+ TS_HTTP_STATUS_PAYMENT_REQUIRED,
+ TS_HTTP_STATUS_FORBIDDEN,
+ TS_HTTP_STATUS_NOT_FOUND,
+ TS_HTTP_STATUS_METHOD_NOT_ALLOWED,
+ TS_HTTP_STATUS_NOT_ACCEPTABLE,
+
TS_HTTP_STATUS_PROXY_AUTHENTICATION_REQUIRED,
+ TS_HTTP_STATUS_REQUEST_TIMEOUT,
+ TS_HTTP_STATUS_CONFLICT,
+ TS_HTTP_STATUS_GONE,
+ TS_HTTP_STATUS_LENGTH_REQUIRED,
+ TS_HTTP_STATUS_PRECONDITION_FAILED,
+ TS_HTTP_STATUS_REQUEST_ENTITY_TOO_LARGE,
+ TS_HTTP_STATUS_REQUEST_URI_TOO_LONG,
+ TS_HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE,
+
TS_HTTP_STATUS_REQUESTED_RANGE_NOT_SATISFIABLE,
+ TS_HTTP_STATUS_EXPECTATION_FAILED,
+ TS_HTTP_STATUS_UNPROCESSABLE_ENTITY,
+ TS_HTTP_STATUS_LOCKED,
+ TS_HTTP_STATUS_FAILED_DEPENDENCY,
+ TS_HTTP_STATUS_UPGRADE_REQUIRED,
+ TS_HTTP_STATUS_PRECONDITION_REQUIRED,
+ TS_HTTP_STATUS_TOO_MANY_REQUESTS,
+
TS_HTTP_STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE,
+ TS_HTTP_STATUS_INTERNAL_SERVER_ERROR,
+ TS_HTTP_STATUS_NOT_IMPLEMENTED,
+ TS_HTTP_STATUS_BAD_GATEWAY,
+ TS_HTTP_STATUS_SERVICE_UNAVAILABLE,
+ TS_HTTP_STATUS_GATEWAY_TIMEOUT,
+ TS_HTTP_STATUS_HTTPVER_NOT_SUPPORTED,
+ TS_HTTP_STATUS_VARIANT_ALSO_NEGOTIATES,
+ TS_HTTP_STATUS_INSUFFICIENT_STORAGE,
+ TS_HTTP_STATUS_LOOP_DETECTED,
+ TS_HTTP_STATUS_NOT_EXTENDED,
+
TS_HTTP_STATUS_NETWORK_AUTHENTICATION_REQUIRED};
+
+static bool should_log(TSHttpTxn txnp);
+static void log_request_line(TSMBuffer bufp, TSMLoc loc, const char
*output_header);
+static void log_response_status_line(TSMBuffer bufp, TSMLoc loc, const
char *output_header);
+static void log_headers(TSMBuffer bufp, TSMLoc loc, const char
*output_header);
+static void log_full_transaction(TSHttpTxn txnp);
+static int log_requests_plugin(TSCont contp ATS_UNUSED, TSEvent event,
void *edata);
+
+static bool
+should_log(TSHttpTxn txnp)
+{
+ TSMBuffer txn_resp_bufp;
+ TSMLoc txn_resp_loc;
+ TSHttpStatus resp_status;
+
+ if (TSHttpTxnClientRespGet(txnp, &txn_resp_bufp, &txn_resp_loc) !=
TS_SUCCESS) {
+ TSError("[log_requests] Couldn't retrieve server response header.");
+ return false;
+ }
+
+ // if resp_status is blacklisted, don't log
+ resp_status = TSHttpHdrStatusGet(txn_resp_bufp, txn_resp_loc);
+ for (int i = 0; i < blacklist_size; ++i) {
+ if (resp_status == blacklist[i])
+ return false;
+ }
--- End diff --
Instead of the `for` loop this might be a bit cleaner. Although you should
be using `std::vector` instead of raw int arrays.
```
if (std::any_of(blacklist, blacklist+blacklist_size, [=] (int code) {
return code == resp_status; }))
return false;
```
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