840452 - downloads sometimes silently get wrong size and get truncated

Status: RESOLVED DUPLICATE of bug 237623

(Firefox :: Downloads Panel, defect)

Description

[Jim Michaels]

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0
Build ID: 20130201065344

Steps to reproduce:

download large file such as cd or dvd .ISO file


Actual results:

once in a while, the file will get truncated. ff will calculate the wrong size and then only download that much info, even though the web site says the file contains X size which is larger. upon re-download, it works usually correctly the next time. 

akamai.com has reported this to be a problem with downloads and makes available a software downloader as part of their service.



Expected results:

should download correctly 1st time by getting the correct filesize. this might be caused by an incorrectly initialized variable or uninitialized variable. check that area of the code base for anything which could cause this. maybe a packet is getting dropped by ff somewhere or misinterpreted.

tcp protocol is connection-based, so it should work with as much data as you want, as long as the connection is still there.

Comment 1

[Jim Michaels]

this problem has been around since version 4 or so.