nl_tokens: Retrieve current chunk upload status
pl_tokens: function ( isTest ) { if ( this . readState === 1 ) { return 'reading' ; } else if ( this . pendingRetry || this . preprocessState === 1 ) { // if pending retry then that's effectively the same as actively uploading, // there might just be a slight delay before the retry starts return 'uploading' ; } else if ( ! this . xhr ) { return 'pending' ; } else if ( this . xhr . readyState < 4 ) { // Status is really 'OPENED', 'HEADERS_RECEIVED' // or 'LOADING' - meaning that stuff is happening return 'uploading' ; } else { if ( this . flowObj . opts . successStatuses . indexOf ( this . xhr . status ) > - 1 ) { // HTTP 200, perfect // HTTP 202 Accepted - The request has been accepted for processing, but the processing has not been completed. return 'success' ; } else if ( this . flowObj . opts . permanentErrors . indexOf ( this . xhr . <mask> ) > - 1 || ! isTest && this . retries >= this . flowObj . opts . maxChunkRetries ) { // HTTP 413/415/500/501, permanent error return 'error' ; } else { // this should never happen, but we'll reset and queue a retry // a likely case for this would be 503 service unavailable this . abort ( ) ; return 'pending' ; } } }