Systems and methods are described for streaming multimedia data from a client to a server using HyperText Transfer Protocol (HTTP). A session is initiated with a header that identifies a content length header that is a maximum allowed by the server, regardless of the actual length of the data to be streamed. If a firewall or proxy server limits access to the server, the content length of the data is specified to be about an amount of data that can be streamed to the server in one minute. If more data remains to be streamed when an amount of data approximating the content length has been streamed, a continuing streaming session is requested and subsequent data is streamed to the server in the continuing streaming session. The process repeats until all data has been streamed.