handle http Persistent connection

When i use http-parser handle http request, i meet a problem.
One http request finished,then "is_message_complete" function is return true.
while next http request comes,the message_complete status is true,how to solve this problem.

Start with the http-parser API and the call site for is_message_complete, focusing on how parser state is handled after one request and before the next. Reproduce the reported sequential-request case and document or test the expected completion state for both messages.

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