Server updated, client not. WhyAggressive caching on GET requests. Fix Add cache-busting headers or query tokens.
Tag: http
Ajax Requests Randomly Return Empty Responses
No errors, no data. WhyServer closes connection before body flush. FixExplicitly flush response on server side.
AJAX — Browser Caches GET Requests Silently
Repeated GET calls may not hit the server. ✅ Fix Add cache-busting or proper headers.
AJAX — 204 Responses Break JSON Parsing
204 No Content has no body. ❌ Crash response.json() ✅ Fix Check status before parsing.
Security — URL Length Can Kill Requests
Browsers & proxies limit URL size. ❌ Breaks Large GET filters Search queries ✅ Fix Use POST for complex payloads.
HTTP — Caching Is Disabled More Often Than You Think
No cache headers = slower everything. ✅ Add ETag Cache-Control If-None-Match Result: fewer bytes, faster pages, happier users.
AJAX — Network Tab Lies About Timing
Browser timing includes: DNS SSL Queuing Connection reuse Real insight Use Server-Timing headers for truth.
Silent AJAX Failures — Missing Content-Type
Backend never hits controller? ✅ Fix headers: { “Content-Type”: “application/json” }
Display HTPP Headers in C# & ASP.net
using System; using System.Web.UI; using System.Collections.Specialized; public partial class _Default : Page { protected void Page_Load(object sender, EventArgs e) { NameValueCollection headers = base.Request.Headers; for (int i = 0; i < headers.Count; i++) { string key = headers.GetKey(i); string value = headers.Get(i); base.Response.Write(key + ” = ” + value + “<br/>”); } } }