Editing Web Ping (section)

=== 觀察HTTP response status code(HTTP回應狀態代碼) ===
瀏覽網頁時，可以觀察該網頁或網頁內元件(例如嵌入圖檔或聲音)的HTTP response status code(HTTP回應狀態代碼)<ref>[http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html HTTP/1.1: Status Code Definitions]</ref>，例如404代表沒有該檔案。
* Mozilla Firefox {{Fx}}內建的工具 -> 網頁開發者 -> 網頁主控台。快速鍵: {{kbd | key = Ctrl}}+{{kbd | key = Shift}}+{{kbd | key = k}}。
** filter: available
** example as follows:
<pre>
[23:14:47.836] GET https://www.google.com/ [HTTP/1.1 200 OK 10763ms]
[23:14:59.707] GET https://www.google.com/ig/cp/get?hl=zh-TW&gl=&authuser=0&bundleJs=0 [HTTP/1.1 304 Not Modified 1593ms]
</pre>
* Firebug for {{Fx}}: 切換到「網路」標籤。快速鍵: {{kbd | key = F12}}
* Google {{chrome}}內建的工具 -> 開發人員工具 -> 切換到「network」標籤。快速鍵: {{kbd | key = Ctrl}}+{{kbd | key = Shift}}+{{kbd | key = i}}
* [https://addons.mozilla.org/en-US/firefox/addon/live-http-headers/ Live HTTP Headers] for {{Fx}}
* [https://curl.haxx.se/docs/manpage.html curl] on {{Linux}} or {{Mac}} e.g. {{kbd | key = <nowiki>curl -v -o /dev/null https://www.slideshare.net</nowiki>}} <ref>[https://asciinema.org/a/89998 中華電信有線網路無法連到 slideshare 的測試 - asciinema]</ref>