InternetOpenUrl() failed. 0x80072efd : unknown error

[Lexicality]

Brief description of your issue

This is very similar to #326, however I have TLS 1.2 enabled and I can access the cache fine outside winget.

Steps to reproduce

C:\WINDOWS\system32>winget --version
v0.1.42241 Preview
C:\WINDOWS\system32>winget search github
Failed to open the source; try removing and re-adding it
An unexpected error occurred while executing the command:
InternetOpenUrl() failed.
0x80072efd : unknown error

C:\WINDOWS\system32>winget source list
Name   Argument
-----------------------------------------
winget https://winget.azureedge.net/cache

C:\WINDOWS\system32>winget source reset --force
Resetting all sources...Done

C:\WINDOWS\system32>winget source update
Updating all sources...
Updating source: winget...
An unexpected error occurred while executing the command:
InternetOpenUrl() failed.
0x80072efd : unknown error

C:\WINDOWS\system32>winget source add --name test https://winget.azureedge.net/cache
Adding source:
  test -> https://winget.azureedge.net/cache
An unexpected error occurred while executing the command:
A connection with the server could not be established

C:\WINDOWS\system32>curl https://winget.azureedge.net/cache
´╗┐<?xml version="1.0" encoding="utf-8"?><Error><Code>ResourceNotFound</Code><Message>The specified resource does not exist.
RequestId:a5bc7e36-e01e-009c-76ff-88e0ac000000
Time:2020-09-12T12:24:09.5326840Z</Message></Error>

Expected behavior

winget should function

Actual behavior

winget does not function

Environment

C:\WINDOWS\system32>winget --info
Windows Package Manager v0.1.42241 Preview
Copyright (c) Microsoft Corporation. All rights reserved.

Windows: Windows.Desktop v10.0.18362.1016
Package: Microsoft.DesktopAppInstaller v1.10.42241.0

[Lexicality]

I eventually figured out it was being blocked by my firewall under appinstallercli.exe.
I expected the winget application to have the word winget in the executable name or installation directory, but neither of them do which is why it took so long for me to find out where it was being blocked.

I would like to suggest renaming the executable to winget-installer-cli.exe or something, and maybe having better error messages for when it's blocked by a firewall?

[denelon]

@Lexicality we don't get an explicit indication that the firewall is blocking the connection. I'm looking at what we can do in the error text, and getting an update at docs.microsoft.com.

[chausner]

The error codes of InternetOpenUrl should get mapped to a descriptive string and displayed. E.g. 0x80072efd maps to ERROR_INTERNET_CANNOT_CONNECT. I had a similar error the other day where the TLS certificate of a download was invalid. I found out by looking up the error code. "unknown error" suggests it's a generic error code but it's actually not.

[bezuglov3000]

I had error 0x80072f7d in winget.
Strange fix for this is enabling tls 1.2 in internet explorer settings.