1. 构造函数
  2. HttpClient
  3. 属性
  4. authenticate
  5. authenticateProxy
  6. autoUncompress
  7. badCertificateCallback
  8. connectionFactory
  9. connectionTimeout
  10. findProxy
  11. hashCode
  12. idleTimeout
  13. keyLog
  14. maxConnectionsPerHost
  15. runtimeType
  16. userAgent
  17. 方法
  18. addCredentials
  19. addProxyCredentials
  20. close
  21. delete
  22. deleteUrl
  23. get
  24. getUrl
  25. head
  26. headUrl
  27. noSuchMethod
  28. open
  29. openUrl
  30. patch
  31. patchUrl
  32. post
  33. postUrl
  34. put
  35. putUrl
  36. toString
  37. 运算符
  38. 运算符 ==
  39. 静态属性
  40. enableTimelineLogging
  41. 静态方法
  42. findProxyFromEnvironment
  43. 常量
  44. defaultHttpPort
  45. defaultHttpsPort