Merge #14618: rpc: Make HTTP RPC debug logging more informative

ab8c6f24d28ea1d1e6258cf316b4b97a0baf2377 Add SAFE_CHARS[SAFE_CHARS_URI]: Chars allowed in URIs (RFC 3986) (practicalswift)
991248649b76a5a071e1360a700f3e2ecf3e1e1f rpc: Make HTTP RPC debug logging more informative (practicalswift)

Pull request description:

  * Make HTTP RPC debug logging more informative
  * Avoid excessively large log messages (which could theoretically fill up the disk) when running with debug option `-debug=http`

Tree-SHA512: 9068862fb7d34db1e12e6b9dde78b669b86c65b4fed3ea8c9eb6c35310d77fd12b16644728fd7e9fbf25059d25114bded9e061eb3de649d8847486ec42041ce9

1 files changed, 7 insertions, 3 deletions

diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 60e7b917d..91ebc4680 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -224,21 +224,25 @@ static void http_request_cb(struct evhttp_request* req, void* arg)
     }
     std::unique_ptr<HTTPRequest> hreq(new HTTPRequest(req));
 
-    LogPrint(BCLog::HTTP, "Received a %s request for %s from %s\n",
-             RequestMethodString(hreq->GetRequestMethod()), hreq->GetURI(), hreq->GetPeer().ToString());
-
     // Early address-based allow check
     if (!ClientAllowed(hreq->GetPeer())) {
+        LogPrint(BCLog::HTTP, "HTTP request from %s rejected: Client network is not allowed RPC access\n",
+                 hreq->GetPeer().ToString());
         hreq->WriteReply(HTTP_FORBIDDEN);
         return;
     }
 
     // Early reject unknown HTTP methods
     if (hreq->GetRequestMethod() == HTTPRequest::UNKNOWN) {
+        LogPrint(BCLog::HTTP, "HTTP request from %s rejected: Unknown HTTP request method\n",
+                 hreq->GetPeer().ToString());
         hreq->WriteReply(HTTP_BADMETHOD);
         return;
     }
 
+    LogPrint(BCLog::HTTP, "Received a %s request for %s from %s\n",
+             RequestMethodString(hreq->GetRequestMethod()), SanitizeString(hreq->GetURI(), SAFE_CHARS_URI).substr(0, 100), hreq->GetPeer().ToString());
+
     // Find registered handler for prefix
     std::string strURI = hreq->GetURI();
     std::string path;