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-- Command-line-driven web client for mol2chemfig.
local os = require("os")
local io = require("io")
local json = require("json")
require("rpc") -- modifies json in place to add rpc namespace
local progname = arg[0]
local client_version = "1.2"
server = json.rpc.proxy(server_address)
local server_info, error = server.info({progname, client_version})
if error then
io.stderr:write("Error: ", error)
os.exit()
end
-- if we get here, the server responds as expected.
function printhelp()
print (server_info['help_text'])
os.exit()
end
-- Split input into options and arguments. Only arguments
-- at the end are accepted.
local arguments = {}
local i = #arg
if i == 0 then -- no input at all
printhelp()
end
noargs = server_info['noarg_shortopts']
-- separate options and arguments
while i > 0 and arg[i]:sub(1,1) ~= '-' do
local j = i - 1
if j == 0 or
arg[j]:sub(1,1) ~= '-' or
arg[j]:sub(2,2) == '-' or
string.find(noargs, arg[j]:sub(2,2))
then
table.insert(arguments,#arguments+1,arg[i])
table.remove(arg, i)
end
i = j
end
-- what remains in arg after removing arguments are options
local user_options = table.concat(arg, ' ')
-- first, see whether the user requests help or the program version.
local version_opts = server_info['version_opts']
local s
for i,s in ipairs(version_opts) do
if string.find(user_options, s) then
print(server_info['version_text'])
print("On your system, the client is installed in: " .. progname)
os.exit()
end
end
local help_opts = server_info['help_opts']
for i,s in ipairs(help_opts) do
if string.find(user_options, s) then
printhelp()
end
end
-- if we get here, the user should have provided exactly one argument.
if #arguments ~= 1 then
print ('Please provide exactly one argument (must come last, after any options)')
os.exit()
end
-- have exactly one argument. read it directly, or treat it as a file name?
local direct_input = false
local direct_opts = server_info['direct_opts']
for i,s in ipairs(direct_opts) do
if string.find(user_options, s) then
direct_input = true
end
end
local data
if direct_input == false then
f = io.open(arguments[1])
if f then
data = f:read("*all")
else
print ("File '" .. arguments[1] .. "' not found")
os.exit()
end
else
data = arguments[1]
end
-- process options and data
local result, error = server.process({progname, user_options, data})
if error then
io.stderr:write(error .. '\n')
else
print(result)
end
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