An HTTP Proxy server relays requests between the HTTP client (e.g. your browser) and the server—whether it be out on the web, intranet or localhost. When it’s under your control, the proxy is a great place to inspect and debug client-server interactions over HTTP, log and report, tune and tamper with the requests the client makes, and the responses the server(s) produce. In this article I’ll show how to use Charles (one such proxy tool) to help solve a range of common web, and especially RIA, development problems.

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