oxy middleware

https://github.com/vulcand/oxy

Provides quality middleware basics:

Oxy is a Go library with HTTP handlers that enhance HTTP standard library:

• Buffer retries and buffers requests and responses
• Stream passes-through requests, supports chunked encoding with configurable flush interval
• Forward forwards requests to remote location and rewrites headers
• Roundrobin is a round-robin load balancer
• Circuit Breaker Hystrix-style circuit breaker
• Connlimit Simultaneous connections limiter
• Ratelimit Rate limiter (based on tokenbucket algo)
• Trace Structured request and response logger