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module web
implicit none
private
public :: handle_request
integer, parameter::REQUEST_UNKNOWN = 0
integer, parameter::REQUEST_GET = 1
integer, parameter::REQUEST_POST = 2
contains
function method()
use utilities, only: toupper
implicit none
integer::method
character(4)::method_text
call get_environment_variable("REQUEST_METHOD", method_text)
call toupper(method_text)
if(trim(method_text) == "GET") then
method = REQUEST_GET
else if(method_text == "POST") then
method = REQUEST_POST
else
method = REQUEST_UNKNOWN
end if
end function method
subroutine build_request_object(req)
use server_response, only:request
type(request), intent(out)::req
character(len=:), allocatable::url, script_name
integer::url_size
call get_environment_variable("REQUEST_URI", length=url_size)
allocate(character(len=url_size)::url, script_name)
call get_environment_variable("REQUEST_URI", url)
call get_environment_variable("SCRIPT_NAME", script_name)
! If we're in CGI mode, treat the "server" as the script name
call req%init(url, server_explicit=script_name, protocol_explicit="http")
deallocate(url)
deallocate(script_name)
end subroutine build_request_object
function html_link(link, label) result(res)
implicit none
character(*), intent(in)::link, label
character(len=:), pointer::res
integer::nl
nl = len_trim(link) + len_trim(label) + len('<a href=""></a>')
allocate(character(len=nl)::res)
res = '<a href="'//trim(link)//'">'//trim(label)//'</a>'
end function html_link
function generate_releases_html(req) result(res)
use utilities
use server_response
use config
implicit none
type(request), intent(in)::req
character(len=:), pointer::res
character(len=DIR_LIST_STRING_LENGTH), dimension(:), pointer::directories
character(len=DIR_LIST_STRING_LENGTH), dimension(:), pointer::files
character(1024)::public_path, local_path, subpath
integer::allocation_size, i
character(1)::nl = new_line(' ')
character(4)::folder_icon = char(240)//char(159)//char(147)//char(129)
character(len=:), pointer::one_link
if(.not. associated(req%query_string)) then
public_path = "/releases"
local_path = release_dir
else if(len_trim(req%query_string) == 0) then
public_path = "/releases"
local_path = release_dir
else
call combine_paths("/releases", req%query_string, public_path)
call combine_paths(release_dir, req%query_string, local_path)
end if
res => null()
! Easy safety check - no relative paths
if(index(local_path, '..') > 0) then
allocate(character(len=64)::res)
res = "None Found"
return
end if
directories => get_directories_in_directory(local_path)
files => get_files_in_directory(local_path)
allocation_size = 1024
if(associated(directories)) then
allocation_size = allocation_size + 2 * size(directories) * (DIR_LIST_STRING_LENGTH+32)
end if
if(associated(files)) then
allocation_size = allocation_size + 2 * size(files) * (DIR_LIST_STRING_LENGTH+32)
end if
allocate(character(len=allocation_size) :: res)
res = "<h2>Listing for "//trim(public_path)//"</h2>"//nl//"<ul>"
! Add an "Up" link
if(trim(public_path) /= "/releases") then
i = index(req%query_string, "/", back=.true.)
if(i > 0) then
one_link => html_link("releases.html?"//req%query_string(1:(i-1)), "Up a directory")
else
one_link => html_link("releases.html", "Up a directory")
end if
res = trim(res)//nl//"<li>"//one_link//"</li>"
deallocate(one_link)
end if
if(associated(directories)) then
do i = 1, size(directories)
if(associated(req%query_string)) then
call combine_paths(req%query_string, trim(directories(i)), subpath)
else
subpath = trim(directories(i))
end if
one_link => html_link("releases.html?"//trim(subpath), folder_icon//" "//trim(directories(i)))
res = trim(res)//nl//"<li>"//one_link//"</li>"
deallocate(one_link)
end do
deallocate(directories)
end if
if(associated(files)) then
do i = 1, size(files)
call combine_paths(public_path(2:len_trim(public_path)), trim(files(i)), subpath)
one_link => html_link(trim(subpath), trim(files(i)))
res = trim(res)//nl//"<li>"//one_link//"</li>"
deallocate(one_link)
end do
deallocate(files)
end if
end function generate_releases_html
function request_templated(req) result(resp)
use page_template
use config, only: template_filepath, project
use logging
use server_response, only:request, response
use http, only: HTTP_CODE_SUCCESS, HTTP_CODE_NOTFOUND
implicit none
type(request), intent(in)::req
type(response)::resp
character(1024)::template_file
type(template)::page
character(64)::first
character(len=:), pointer::contents
call template_filepath("index.html", template_file)
call page%init(trim(template_file))
! Initialize with success
resp%code = HTTP_CODE_SUCCESS
call req%path_component(1, first)
if(trim(req%location) == "/" .or. trim(req%location) == "/index.html" .or. trim(req%location) == "/home.html") then
call page%assign('title', 'Home')
else if(trim(req%location) == "/releases.html") then
call page%assign('title', 'Releases')
contents => generate_releases_html(req)
call page%assign('contents', contents)
else if(trim(req%location) == "/jobs.html") then
call page%assign('title', 'Jobs')
!contents => generate_jobs_gemini(req)
!call page%assign('contents', contents)
else if(trim(req%location) == "/players.html") then
call page%assign('title', 'Players')
!contents => generate_players_gemini()
!call page%assign('contents', contents)
else if(req%location(1:9) == '/players/') then
else if(trim(req%location) == "/about.html") then
call page%assign('title', 'About')
else if(trim(req%location) == "/instructions.html") then
call page%assign('title', 'Build Instructions')
!contents => generate_instructions_gemini()
!call page%assign('contents', contents)
else if(trim(first) == "instructions") then
call page%assign('title', 'Build Instructions')
!contents => generate_one_instuction_gemini(req)
!call page%assign('contents', contents)
else if(trim(first) == "jobs") then
!call get_job_page_title(req, job_page_title)
!call page%assign('title', trim(job_page_title))
!contents => generate_one_job_gemini(req)
!call page%assign('contents', contents)
else
call page%assign('title', 'Not Found')
resp%code = HTTP_CODE_NOTFOUND
end if
call page%assign('project', project)
call page%assign('base_url', req%server)
call write_log("Rendering page for "//req%location)
call page%render()
call write_log("Finalizing response", LOG_INFO)
resp%temporary_file = .true.
resp%body_filename => page%output_filename
resp%body_mimetype = "text/html"
end function request_templated
subroutine handle_request()
use server_response, only:request, response
use logging
use request_utils
use http
use iso_fortran_env, only: output_unit
use utilities, only: echo_file_stdout
implicit none
type(request)::req
type(response)::resp
integer::response_size
character(64)::logresponse
call build_request_object(req)
if(is_request_static(req)) then
call write_log("Req static", LOG_INFO)
resp = request_static(req)
else
call write_log("Req template", LOG_INFO)
resp = request_templated(req)
end if
! Perform the response
call write_log("Publishing response", LOG_INFO)
write(logresponse, *) "Response code is: ", resp%code
call write_log(trim(logresponse), LOG_INFO)
select case(resp%code)
case(HTTP_CODE_REDIRECT)
call write_redirect(output_unit, resp%code, trim(resp%url))
case(HTTP_CODE_SUCCESS)
inquire(file=resp%body_filename, size=response_size)
call write_response_headers(output_unit, resp%code, response_size, trim(resp%body_mimetype))
call echo_file_stdout(resp%body_filename)
case(HTTP_CODE_FAILURE)
call write_log("Failure reported for location: "//trim(req%location), LOG_NORMAL)
! Need some more...
end select
call write_log("Cleanup", LOG_INFO)
call resp%destroy()
call req%destroy()
call write_log("Exit handler", LOG_INFO)
end subroutine handle_request
end module web
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