| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/google/martian | Package martian provides an HTTP/1.1 proxy with an API for configurable request and response modifiers. |
| github.com/google/martian/parse | Package parse constructs martian modifiers from JSON messages. |
| net/http | Package http provides HTTP client and server implementations. |
| net/http/httputil | Package httputil provides HTTP utility functions, complementing the more common ones in the net/http package. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |