[SR-11673] [Linux] URLSession download task merges redirect responses

[swift-ci]

Previous ID	SR-11673
Radar	None
Original Reporter	shad0wdev (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Attachment: Download

Environment

Ubuntu 18.04, 16.04

macOS Mojave

Swift 5.0 - 5.1 and master branch

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Bug, Linux
Assignee	@spevans
Priority	Medium

md5: 62ca5b243957439bdbba7fbc7011d979

Issue Description:

Issue:

When trying to download file with URLSession, it merges HTML from redirect page (with all redirect codes - 301, 302, 307, 308) with data received from correct page (with code 200). This happens only on Linux platftorms and not on macOS.

How to reproduce:

1. Be on Linux

2. Use URL with any redirect code leading to any page with proper content you want to receive

3. Use any URLSession with any configuration

4. Use URLSession dataTask() method

I've written simple tests with simple Data(contentsOf: ) method, URLSession dataTask and downloadTask. They're in attachments.

[spevans]

#2744

[spevans]

Fixed in swift-DEVELOPMENT-SNAPSHOT-2020-03-26

$ ~/swift-build/swift-DEVELOPMENT-SNAPSHOT-2020-03-26-a-ubuntu18.04/usr/bin/swift sr-11673.swift 
 Test 1 passed!
 Test 2 passed!
 Test 3 passed!
 Test 4 passed!
 Hooray! There was no asserts!