Does Java have a complete enum for HTTP response codes

Question

I m wondering if there is an enum type in some standard Java class library that defines symbolic constants for all of the valid HTTP response codes  It should support conversion to from the corresponding integer values   I m debugging some Java code that uses javax ws rs core Response Status  It works  but it only defines about half of the valid HTTP response codes

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Use javax servlet http HttpServletResponse class  Example   javax servlet http HttpServletResponse SC UNAUTHORIZED   401 javax servlet http HttpServletResponse SC INTERNAL SERVER ERROR   500

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Also check out the Restlet Status class   http   www restlet org documentation 1 1 api org restlet data Status html

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I don t think there s one that s complete in the standard Java classes  HttpURLConnection is missing quite a few codes  like HTTP 100 Continue     There s a complete list in the Apache HttpComponents  though  org apache http HttpStatus  replaced org apache commons HttpClient HttpStatus from Apache Http Client  which reached end of life

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Another option is to use HttpStatus class from the Apache commons-httpclient which provides you the various Http statuses as constants

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If you are using Netty  you can use    io netty handler codec http HttpResponseStatus

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The best provider for http status code constants is likely to be Jetty s org eclipse jetty http HttpStatus class because    there is a javadoc package in maven which is important if you search for the constant and only know the number -  just open the api docs page and search for the number the constants contain the status code number itself    Only thing I would improve  put the status code number in front of the text description in order to make auto-completion lookup more convient when you are starting with the code

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Everyone seems to be ignoring the  enum type  portion of your question   While there is no canonical source for HTTP Status Codes there is an simple way to add any missing Status constants you need to those provided by javax ws rs core Response Status without adding any additional dependencies to your project   javax ws rs core Response Status is just one implementation of the javax ws rs core Response StatusType interface  You simply need to create your own implementation enum with definitions for the Status Codes that you want    Core libraries like Javax  Jersey  etc  are written to the interface StatusType not the implementation Status  or they certainly should be   Since your new Status enum implements StatusType it can be used anyplace you would use a javax ws rs core Response Status constant   Just remember that your own code should also be written to the StatusType interface  This will enable you to use both your own Status Codes along side the  standard  ones   Here s a gist with a simple implementation with constants defined for the  Informational 1xx  Status Codes  https   gist github com avendasora a5ed9acf6b1ee709a14a

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Well  there are static constants of the exact integer values in the HttpURLConnection class

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Here s an enum with status codes and their descriptions that  at time of writing  corresponds to the HTTP status code registry  Note that the registry might get updated  and that sometimes unofficial status codes are used  public enum HttpStatusCode          1xx  Informational     CONTINUE 100   quot Continue quot        SWITCHING PROTOCOLS 101   quot Switching Protocols quot        PROCESSING 102   quot Processing quot        EARLY HINTS 103   quot Early Hints quot           2xx  Success     OK 200   quot OK quot        CREATED 201   quot Created quot        ACCEPTED 202   quot Accepted quot        NON AUTHORITATIVE INFORMATION 203   quot Non-Authoritative Information quot        NO CONTENT 204   quot No Content quot        RESET CONTENT 205   quot Reset Content quot        PARTIAL CONTENT 206   quot Partial Content quot        MULTI STATUS 207   quot Multi-Status quot        ALREADY REPORTED 208   quot Already Reported quot        IM USED 226   quot IM Used quot           3xx  Redirection     MULTIPLE CHOICES 300   quot Multiple Choice quot        MOVED PERMANENTLY 301   quot Moved Permanently quot        FOUND 302   quot Found quot        SEE OTHER 303   quot See Other quot        NOT MODIFIED 304   quot Not Modified quot        USE PROXY 305   quot Use Proxy quot        TEMPORARY REDIRECT 307   quot Temporary Redirect quot        PERMANENT REDIRECT 308   quot Permanent Redirect quot           4xx  Client Error     BAD REQUEST 400   quot Bad Request quot        UNAUTHORIZED 401   quot Unauthorized quot        PAYMENT REQUIRED 402   quot Payment Required quot        FORBIDDEN 403   quot Forbidden quot        NOT FOUND 404   quot Not Found quot        METHOD NOT ALLOWED 405   quot Method Not Allowed quot        NOT ACCEPTABLE 406   quot Not Acceptable quot        PROXY AUTHENTICATION REQUIRED 407   quot Proxy Authentication Required quot        REQUEST TIMEOUT 408   quot Request Timeout quot        CONFLICT 409   quot Conflict quot        GONE 410   quot Gone quot        LENGTH REQUIRED 411   quot Length Required quot        PRECONDITION FAILED 412   quot Precondition Failed quot        REQUEST TOO LONG 413   quot Payload Too Large quot        REQUEST URI TOO LONG 414   quot URI Too Long quot        UNSUPPORTED MEDIA TYPE 415   quot Unsupported Media Type quot        REQUESTED RANGE NOT SATISFIABLE 416   quot Range Not Satisfiable quot        EXPECTATION FAILED 417   quot Expectation Failed quot        MISDIRECTED REQUEST 421   quot Misdirected Request quot        UNPROCESSABLE ENTITY 422   quot Unprocessable Entity quot        LOCKED 423   quot Locked quot        FAILED DEPENDENCY 424   quot Failed Dependency quot        TOO EARLY 425   quot Too Early quot        UPGRADE REQUIRED 426   quot Upgrade Required quot        PRECONDITION REQUIRED 428   quot Precondition Required quot        TOO MANY REQUESTS 429   quot Too Many Requests quot        REQUEST HEADER FIELDS TOO LARGE 431   quot Request Header Fields Too Large quot        UNAVAILABLE FOR LEGAL REASONS 451   quot Unavailable For Legal Reasons quot           5xx  Server Error     INTERNAL SERVER ERROR 500   quot Internal Server Error quot        NOT IMPLEMENTED 501   quot Not Implemented quot        BAD GATEWAY 502   quot Bad Gateway quot        SERVICE UNAVAILABLE 503   quot Service Unavailable quot        GATEWAY TIMEOUT 504   quot Gateway Timeout quot        HTTP VERSION NOT SUPPORTED 505   quot HTTP Version Not Supported quot        VARIANT ALSO NEGOTIATES 506   quot Variant Also Negotiates quot        INSUFFICIENT STORAGE 507   quot Insufficient Storage quot        LOOP DETECTED 508   quot Loop Detected quot        NOT EXTENDED 510   quot Not Extended quot        NETWORK AUTHENTICATION REQUIRED 511   quot Network Authentication Required quot         private final int value      private final String description       HttpStatusCode int value  String description            this value   value          this description   description             public int getValue             return value             public String getDescription             return description              Override     public String toString             return value    quot   quot    description             public static HttpStatusCode getByValue int value            for HttpStatusCode status   values                  if status value    value  return status                    throw new IllegalArgumentException  quot Invalid status code   quot    value

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1  To get the reason text if you only have the code  you can use   org apache http impl EnglishReasonPhraseCatalog INSTANCE getReason httpCode null    Where httpCode would be the reason code that you got from the HTTP response   See https   hc apache org httpcomponents-core-ga httpcore apidocs org apache http impl EnglishReasonPhraseCatalog html for details  2  To get the reason code if you only have the text  you can use BasicHttpResponse   See here for details  https   hc apache org httpcomponents-core-ga httpcore apidocs org apache http message BasicHttpResponse html

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The Interface javax servlet http HttpServletResponse from the servlet API has all the response codes in the form of int constants names SC  lt description gt   See http   docs oracle com javaee 6 api javax servlet http HttpServletResponse html

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If you re using Spring  the 3 x release has what your looking for  http   static springsource org spring docs 3 0 x api org springframework http HttpStatus html

[java] Does Java have a complete enum for HTTP response codes?

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