fix status ok

Merge pull request #6 from yyyoichi/fix/status

fix set status ok

fix copy bug

Merge pull request #5 from yyyoichi/fix/copy-bug

fix copy file to buf

fix object key bug

Merge pull request #4 from yyyoichi/fix/parse-url-in-object

fix use url object from request

fix no header dependency

Merge pull request #2 from yyyoichi/fix/contentlength-dependency

fix donot depend on content length header

feat httpclient selected by user

Merge pull request #1 from yyyoichi/feature/use-do-interface

feat use http client interface

httpcache-go

• Settings for cache location
• setting whether to use cache or not