http请求的返回code

? //?1xx:?Informational?-?Request?received,?continuing?process
????????100?=>?'Continue',
????????101?=>?'Switching?Protocols',

????????//?2xx:?Success?-?The?action?was?successfully?received,?understood?and
????????//?accepted
????????200?=>?'OK',
????????201?=>?'Created',
????????202?=>?'Accepted',
????????203?=>?'Non-Authoritative?Information',
????????204?=>?'No?Content',
????????205?=>?'Reset?Content',
????????206?=>?'Partial?Content',

????????//?3xx:?Redirection?-?Further?action?must?be?taken?in?order?to?complete
????????//?the?request
????????300?=>?'Multiple?Choices',
????????301?=>?'Moved?Permanently',
????????302?=>?'Found',??//?1.1
????????303?=>?'See?Other',
????????304?=>?'Not?Modified',
????????305?=>?'Use?Proxy',
????????307?=>?'Temporary?Redirect',

????????//?4xx:?Client?Error?-?The?request?contains?bad?syntax?or?cannot?be
????????//?fulfilled
????????400?=>?'Bad?Request',
????????401?=>?'Unauthorized',
????????402?=>?'Payment?Required',
????????403?=>?'Forbidden',
????????404?=>?'Not?Found',
????????405?=>?'Method?Not?Allowed',
????????406?=>?'Not?Acceptable',
????????407?=>?'Proxy?Authentication?Required',
????????408?=>?'Request?Timeout',
????????409?=>?'Conflict',
????????410?=>?'Gone',
????????411?=>?'Length?Required',
????????412?=>?'Precondition?Failed',
????????413?=>?'Request?Entity?Too?Large',
????????414?=>?'Request-URI?Too?Long',
????????415?=>?'Unsupported?Media?Type',
????????416?=>?'Requested?Range?Not?Satisfiable',
????????417?=>?'Expectation?Failed',

????????//?5xx:?Server?Error?-?The?server?failed?to?fulfill?an?apparently
????????//?valid?request
????????500?=>?'Internal?Server?Error',
????????501?=>?'Not?Implemented',
????????502?=>?'Bad?Gateway',
????????503?=>?'Service?Unavailable',
????????504?=>?'Gateway?Timeout',
????????505?=>?'HTTP?Version?Not?Supported',
????????509?=>?'Bandwidth?Limit?Exceeded',