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note description: "Access to environment variables set by the HTTP server when the CGI application is executed. This class may be used as ancestor by classes needing its facilities." legal: "See notice at end of class." status: "See notice at end of class." date: "$Date: 2019-08-05 00:14:33 -0800 (Mon, 05 Aug 2019) $" revision: "$Revision: 103394 $" class interface CGI_ENVIRONMENT create default_create -- Process instances of classes with no creation clause. -- (Default: do nothing.) -- (from ANY) feature -- Access Arguments: ARGUMENTS_32 -- Arguments that were used to start current execution. -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class available_cpu_count: NATURAL_32 -- Number of available CPUs. -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class current_working_path: PATH -- Directory of current execution. -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class result_not_void: Result /= Void Default_shell: STRING_32 -- Default shell -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class generating_type: TYPE [detachable CGI_ENVIRONMENT] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty Home_directory_path: detachable PATH -- Directory name corresponding to the home directory. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT home_directory_supported: Operating_environment.home_directory_supported ensure -- from EXECUTION_ENVIRONMENT instance_free: class item (s: READABLE_STRING_GENERAL): detachable STRING_32 -- Value of s if it is an environment variable and has been set; -- void otherwise. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT s_exists: s /= Void not_has_null_character: not s.has ('%U'.to_character_32) ensure -- from EXECUTION_ENVIRONMENT instance_free: class Root_directory_name: STRING_8 -- Directory name corresponding to the root directory. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT root_directory_supported: Operating_environment.root_directory_supported ensure -- from EXECUTION_ENVIRONMENT instance_free: class result_not_void: Result /= Void starting_environment: HASH_TABLE [STRING_32, STRING_32] -- Table of environment variables when current process starts, -- indexed by variable name -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class result_attached: Result /= Void Temporary_directory_path: detachable PATH -- Temporary directory name. -- On Windows:  %SystemDrive%\Users\%USERNAME%\AppData\Local\Temp (%USERPROFILE%\AppData\Local\Temp). -- On Unix: /tmp and /var/tmp. -- On VMS: /sys$scratch -- Otherwise Void -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class User_directory_path: detachable PATH -- Directory name corresponding to the user directory -- On Windows: C:\Users\manus\Documents -- On Unix & Mac: $HOME -- Otherwise Void -- (from EXECUTION_ENVIRONMENT) ensure -- from EXECUTION_ENVIRONMENT instance_free: class feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal alias "≡≡≡" (other: CGI_ENVIRONMENT): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: CGI_ENVIRONMENT): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal alias "" (other: CGI_ENVIRONMENT): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) feature -- Status setting change_working_path (path: PATH) -- Set the current directory to path -- (from EXECUTION_ENVIRONMENT) launch (s: READABLE_STRING_GENERAL) -- Pass to the operating system an asynchronous request to -- execute s interpreted as a Unicode string. -- If s is empty, use the default shell as command. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT s_not_void: s /= Void ensure -- from EXECUTION_ENVIRONMENT instance_free: class put (value, key: READABLE_STRING_GENERAL) -- Set the environment variable key to value treating both -- value and key as Unicode characters. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT key_exists: key /= Void key_meaningful: not key.is_empty not_key_has_null_character: not key.has ('%U'.to_character_32) value_exists: value /= Void not_value_has_null_character: not value.has ('%U'.to_character_32) ensure -- from EXECUTION_ENVIRONMENT variable_set: return_code = 0 implies ((value.is_empty and then item (key) = Void) or else not value.is_empty and then attached item (key) as k and then k.same_string_general (value)) sleep (nanoseconds: INTEGER_64) -- Suspend thread execution for interval specified in -- nanoseconds (1 nanosecond = 10^(-9) second). -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT non_negative_nanoseconds: nanoseconds >= 0 ensure -- from EXECUTION_ENVIRONMENT instance_free: class system (s: READABLE_STRING_GENERAL) -- Pass to the operating system a request to execute s interpreted as a Unicode string. -- If s is empty, use the default shell as command. -- (from EXECUTION_ENVIRONMENT) require -- from EXECUTION_ENVIRONMENT s_exists: s /= Void feature -- Duplication copy (other: CGI_ENVIRONMENT) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: CGI_ENVIRONMENT) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: CGI_ENVIRONMENT -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: CGI_ENVIRONMENT) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: CGI_ENVIRONMENT -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: CGI_ENVIRONMENT -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable CGI_ENVIRONMENT -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class feature -- Cookies Cookies: HASH_TABLE [STRING_8, STRING_8] -- Cookie Information relative to data. feature -- Environment variable setting set_environment_variable (variable, val: STRING_8) -- Set environment variable variable to val. require valid_variable: variable /= Void and then variable.count > 0 valid_value: val /= Void feature -- Headerline based environment variables Http_accept: STRING_8 -- MIME types which the client will accept. Http_user_agent: STRING_8 -- Browser the client is using to send the request. feature -- Not request-specific environment variables Gateway_interface: STRING_8 -- Revision of the CGI specification to which this server complies. Server_name: STRING_8 -- Server's hostname, DNS alias, or IP address. Server_software: STRING_8 -- Name and version of information server answering the request. feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void feature -- Request specific environment variables Auth_type: STRING_8 -- Protocol-specific authentication method used to validate user. Content_length: STRING_8 -- Length of the said content as given by the client. Content_type: STRING_8 -- Content type of data. Path_info: STRING_8 -- Extra path information, as given by the client. Path_translated: STRING_8 -- Translated version of PATH_INFO provided by server. Query_string: STRING_8 -- Information which follows ? in URL referencing CGI program. Remote_addr: STRING_8 -- IP address of the remote host making the request. Remote_host: STRING_8 -- Hostname making the request. Remote_ident: STRING_8 -- User name retrieved from server if RFC 931 supported. Remote_user: STRING_8 -- Username, if applicable. Request_method: STRING_8 -- Method with which the request was made. Script_name: STRING_8 -- Virtual path to the script being executed. Server_port: STRING_8 -- Port number to which request was sent. Server_protocol: STRING_8 -- Name and revision of information protocol of this request. feature -- Status return_code: INTEGER_32 -- Status code set by last call to system or put -- (from EXECUTION_ENVIRONMENT) invariant -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2019, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class CGI_ENVIRONMENT
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