eSeGeCe Blog
Release notes, deep dives, and tutorials for sgcWebSockets, sgcHTML, sgcOpenAPI, sgcSign, sgcBiometrics, and sgcIndy.
Static OpenSSL Linking in sgcWebSockets: No More libcrypto and libssl DLLs
OpenSSL can now be linked directly inside your sgcWebSockets executable instead of being loaded at runtime from libcrypto and libssl DLLs. Add one unit to the uses clause and there is nothing else to configure…
TCPKeepAlive and KeepAliveTimeout for IOCP and EPOLL Servers
sgcWebSockets adds TCPKeepAlive and KeepAliveTimeout to the IOCP and EPOLL server engines, closing connections whose peer silently disappeared instead of leaving them open forever…
HTTP/3 Client and Server Components for Delphi and C++ Builder
sgcQUIC brings HTTP/3 to Delphi and C++ Builder with TsgcHTTP3Client and TsgcHTTP3Server, running HTTP semantics over QUIC with QPACK header compression, every verb, async requests and Alt-Svc discovery…
QUIC Client and Server Components for Delphi and C++ Builder
sgcQUIC adds the QUIC transport protocol to Delphi and C++ Builder with TsgcQUICClient and TsgcQUICServer, built on the native OpenSSL 3.5 QUIC engine with TLS 1.3, multiplexed streams and 0-RTT…
Three New sgcHTML Admin Components: Presence, RolesPermissions and UserManagement
Three new sgcHTML admin components: Presence for a live who's-online roster, RolesPermissions for a grant matrix, and UserManagement for a full user administration table…
sgcHTML on WebBroker and DataSnap
Serve sgcHTML pages from any WebBroker application and from DataSnap servers, with live WebSocket updates on the same port as your DataSnap REST endpoints…
Six New sgcHTML Feedback Components: Badge, PDFViewer, ContextMenu, ProgressBar, JobProgress and LogViewer
Six new sgcHTML feedback and layout components: Badge, PDFViewer, ContextMenu, ProgressBar, JobProgress and LogViewer — telling a visitor what's happening right now…
Six New sgcHTML Form Inputs: MultiSelect, ColorPicker, Slider, TimePicker, SignaturePad and Transfer
Six new sgcHTML form components: MultiSelect, ColorPicker, Slider, TimePicker, SignaturePad and Transfer — the inputs a real admin form needs beyond a plain text box…
Integrating Third-Party JavaScript Libraries in sgcHTML
Drop D3.js, Chart.js, a DevExtreme Grid or any browser library into an sgcHTML page with three hooks, or wrap it in a reusable server-side component…
Six New sgcHTML Visuals: Heatmap, Sparkline, CandlestickChart, TreeMap, QRCode and Barcode
Six new sgcHTML visuals rendered as pure server-side SVG: Heatmap, Sparkline, CandlestickChart, TreeMap, QRCode and Barcode — no charting library, no client-side JavaScript…
Four New sgcHTML Components for Structured Data: TreeGrid, PivotTable, ActivityFeed and Splitter
Four new sgcHTML components for structured data: TreeGrid for hierarchical tables, PivotTable for grouped aggregates, ActivityFeed for live event streams, and Splitter for resizable two-pane layouts…
sgcWebSockets 2026.7: Clustering, Message History, async / await and Hardened Clients
sgcWebSockets 2026.7 adds multi-server clustering, message history with reconnect recovery, async / await, backoff and retries, send-queue backpressure, HTTP server compression and a hardened HTTP client…
Crypto Feeds That Survive a Reconnect, and a Rate Limiter That Keeps You Unbanned
Automatic resubscribe after a reconnect on the Binance, Kraken, Coinbase and other exchange clients, plus a client-side rate limiter that caps how many REST requests you send in a time window…
OAuth2 for the MCP Client, and the Identity Assertion Grant
The MCP client can now authenticate with OAuth2: it fetches the token, caches it and reuses it until it expires. Plus a new grant type, the Identity Assertion Authorization Grant, for chaining an identity across domains…
Backpressure: Send-Queue Limits for Slow WebSocket Clients
One client that stopped reading can grow a broadcasting server's memory until it falls over. sgcWebSockets 2026.7 bounds the per connection send queue with MaxQueueSize and three overflow policies, plus an OnSendBufferFull event…
E2EE Identity Verification: Stopping a Key Swap in the Middle
Encrypting to a public key is worthless if the key came from the attacker. sgcWebSockets now signs each ephemeral E2EE key with a long-term identity key, so peers verify the signature, compare fingerprints and pin them…
gzip and deflate Compression on the sgcWebSockets HTTP Server
The sgcWebSockets HTTP servers can now compress responses with gzip or deflate when the client advertises it in Accept-Encoding, for DocumentRoot files and for replies you build yourself, off by default…
Reconnect and Retry: Exponential Backoff, Jitter and Retry-After
The WatchDog can now reconnect with exponential backoff plus jitter instead of a fixed interval, and the HTTP client can retry a failed request by itself, honouring the server's Retry-After hint…
async / await in Delphi: sgcWebSockets Without Event Handlers
sgcWebSockets 2026.7 adds tasks and futures to Delphi: await an HTTP request, a WebSocket connect or an AI chat call as if it returned a value, with ThenProc, OnError and cancellation that really stops the work…
The New HTTP QUERY Method in Delphi
The IETF has specified a new HTTP method called QUERY: a safe, idempotent request that carries a body. sgcWebSockets supports it in clients and servers over HTTP/1.1, HTTP/2 and HTTP/3…
sgcHTML Site Component: A Whole Web Page from One Delphi Component
One new sgcHTML component builds an entire web page — header, navigation menu, content and footer — and a single Layout property reshapes it across six templates, in Delphi, C++ Builder and .NET…
Hardening the HTTP Client in sgcWebSockets
An HTTP client that follows redirects and reads unbounded responses is an attack surface. sgcWebSockets 2026.7 adds opt-in switches that close it: credential stripping on cross-host redirects, no HTTPS downgrade, response caps, cookie sanity…
sgcWebSockets Message History & Reconnect Recovery — Never Miss a Message
sgcWebSockets keeps a bounded per-channel message history with offsets, so a client that drops its connection automatically replays the messages it missed on reconnect, opt-in, with Delphi and .NET examples…
sgcWebSockets Clustering — Scale WebSocket Servers Across Multiple Nodes
TsgcWSCluster scales sgcWebSockets across multiple server nodes, a publish or Presence event on one node reaches subscribers on any other node, via a zero-infrastructure mesh backplane or Redis, with Delphi and .NET examples…