作為web開發，應該至少有一款使用順手的http嗅探器，以備開發分析之用，加上ajax現在如此盛行，更加需要一個工具能分析在頁面背後傳輸的http內容。找了幾款http嗅探器，以備選用

1.Fiddler

Fiddler is a HTTP Debugging Proxy which logs all HTTP traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP Traffic, set breakpoints, and "fiddle" with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language.

Fiddler is freeware and can debug traffic from virtually any application, including Internet Explorer, Mozilla Firefox, Opera, and thousands more.

2.ieHTTPHeader

以ie外掛的形式能檢視往返的HTTP Request/Response Header

3.HTTPLook

4.httpExplorer

Used to examine unaltered http requests and responses intercepted with and without proxy. There are several views for the data. Raw view shows the data in bytes. Text view shows the headers in the request and response as well as the http payload. The list of requests and responses are also available in two different views. One view shows the summary of the request. The other view shows the actual sends and receives performed by the browser. It is possible to search through the request urls to look for a particular url using regular expression syntax. httpExplorer works by intercepting the client/server data stream of the embeded browser. It can also work in proxy mode where the data is intercepted by emulating a proxy server.

5.IEWatch

IEWatch is a plug-in for Microsoft Internet Explorer that allows you to view and analyze HTTP/HTTPS headers. Furthermore you can view and analyze the HTML code directly in the browser window.
Unlike proxy applications IEWatch integrates directly in Internet Explorer. No more complicated configuration settings are needed to view HTTP requests. No more searching through long lists of HTTP requests to find the information you are looking for. No more switching between windows to view the HTML source code. Intuitive and easy to use, IEWatch reveals the information you are searching for. View Cookies, GET and POST data by double clicking the list item. IEWatch lets you identify which requests take the longest to complete so you can tune the performance of your web site. Knowing that security is a concern, you can check if sensitive data is sent from your browser to the server. IEWatch is the ideal tool to learn how HTTP and HTML work. The comprehensive help file accelerates the learning curve
IEWatch is the most essential tool for web developers and quality assurance engineers to get their job done fast and efficiently.
For more information, visit http://www. iewatch. com.

6.MMD HttpHeader

MMD HttpHeader is small, absolutely free tool designed to display http headers. Just
type http address to get http header and connection timeout displayed in text window.
It's perfect for all who learn http protocol, internet programers and testers and webmasters.

7.HttpWatch

強大的網頁資料分析工具.整合在Internet Explorer工具欄.包括網頁摘要.Cookies管理.快取管理.訊息頭髮送/接受.字元查詢.POST 資料和目錄管理功能.報告輸出

8.Instance Source

·這是一個IE瀏覽器外掛，主要功能是實時的檢視和修改 HTML 網頁上的原始碼，
當滑鼠指向或選擇網頁的某一部分，即可在下方的視窗中快速看到網頁的原始碼，
這對網頁設計相關人員還是相當有用的。推薦使用！
·此版本新增顯示網頁顏色、顯示程式碼行號、外部物件列表功能。
·還發現了一個小祕密，它似乎能夠解析加密網頁的原始碼。

9.Page Viewer(Maxthon2 外掛) + firebug(firefox 外掛)

這兩款作為web開發輔助也是必不可少的

10.sniffer

sniffer pro，NAI公司出品的