requests.coffee
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unless window.Offline
throw new Error "Requests module brought in without offline.js"
held = []
waitingOnConfirm = false
holdRequest = (req) ->
return if Offline.getOption('requests') is false
Offline.trigger 'requests:capture'
if Offline.state isnt 'down'
waitingOnConfirm = true
held.push req
makeRequest = ({xhr, url, type, user, password, body}) ->
return if Offline.getOption('requests') is false
xhr.abort()
xhr.open(type, url, true, user, password)
xhr.setRequestHeader(name, val) for name, val of xhr.headers
if xhr.mimeType
xhr.overrideMimeType xhr.mimeType
xhr.send(body)
clear = ->
held = []
flush = ->
return if Offline.getOption('requests') is false
Offline.trigger 'requests:flush'
requests = {}
# Dedup requests, favoring the later request
# TODO: Throw out PUT/POST/DELETE requests after too much time?
for request in held
# Break cache breaking
url = request.url.replace /(\?|&)_=[0-9]+/, (match, chr) ->
if chr is '?' then chr else ''
if Offline.getOption('deDupBody')
body = request.body
if body.toString() is '[object Object]'
body = JSON.stringify(body)
else
body = body.toString()
requests["#{ request.type.toUpperCase() } - #{ url } - #{ body }"] = request;
else
requests["#{ request.type.toUpperCase() } - #{ url }"] = request
for key, request of requests
makeRequest request
clear()
setTimeout ->
unless Offline.getOption('requests') is false
Offline.on 'confirmed-up', ->
if waitingOnConfirm
waitingOnConfirm = false
clear()
Offline.on 'up', flush
Offline.on 'down', ->
waitingOnConfirm = false
Offline.onXHR (request) ->
{xhr, async} = request
return if xhr.offline is false
hold = -> holdRequest request
_send = xhr.send
xhr.send = (body) ->
request.body = body
_send.apply xhr, arguments
return unless async
if xhr.onprogress is null
xhr.addEventListener 'error', hold, false
xhr.addEventListener 'timeout', hold, false
else
_onreadystatechange = xhr.onreadystatechange
xhr.onreadystatechange = ->
if xhr.readyState is 0
hold()
else if xhr.readyState is 4 and (xhr.status is 0 or xhr.status >= 12000)
hold()
_onreadystatechange?(arguments...)
Offline.requests = {
flush,
clear
}
, 0