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! Copyright (c) 2020 Jeffrey Armstrong <jeff@rainbow-100.com>
!
! Permission is hereby granted, free of charge, to any person obtaining a copy
! of this software and associated documentation files (the "Software"), to deal
! in the Software without restriction, including without limitation the rights
! to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
! copies of the Software, and to permit persons to whom the Software is
! furnished to do so, subject to the following conditions:
!
! The above copyright notice and this permission notice shall be included in
! all copies or substantial portions of the Software.
!
! The Software shall be used for Good, not Evil.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
! IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
! FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
! AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
! LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
! OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
! SOFTWARE.

module http
implicit none

    integer, parameter::HTTP_CODE_SUCCESS  = 200
    integer, parameter::HTTP_CODE_NOTFOUND = 404
    integer, parameter::HTTP_CODE_FAILURE  = 500
    integer, parameter::HTTP_CODE_REDIRECT = 302
    
contains

    subroutine write_status(outunit, code)
    use logging
    implicit none
    
        integer, intent(in)::outunit, code
        character(len=32)::confirm
        
        write(outunit,'(A7,1X,I3)') "Status:", code
        
        write(confirm,'(A7,1X,I3)') "Status:", code
        call write_log(trim(confirm), LOG_INFO)
        
    end subroutine write_status

    subroutine write_response_headers(outunit, code, filesize, mimetype)
    use logging
    implicit none
    
        integer, intent(in)::outunit, code, filesize
        character(*), intent(in)::mimetype
        
        character(16)::num_txt
        
        character(len=128)::confirm
        
        call write_status(outunit, code)
        
        write(num_txt, '(I16)') filesize
        write(outunit, '(A15,1X)', advance='no') "Content-Length:"
        write(outunit, *) trim(adjustl(num_txt))
        
        write(outunit, '(A13,1X)', advance='no') "Content-Type:"
        write(outunit, *) trim(mimetype)//new_line(' ')
    
    end subroutine write_response_headers
    
    subroutine write_redirect(outunit, code, location)
    implicit none
        
        integer, intent(in)::outunit, code
        character(*), intent(in)::location
    
        call write_status(outunit, code)
        write(outunit, '(A9,1X)', advance='no') "Location:"
        write(outunit, *) trim(location)//new_line(' ')
    
    end subroutine write_redirect
    
end module http