LibGit2Sharp: Fetching fails with "Too many redirects or authentication replays"

libgit2, libgit2sharp

Solution

I tried @Carlos' suggestion in the following way:

public static void GitFetch()
{
    var creds = new UsernamePasswordCredentials()
                {Username = "user",
                 Password = "pass"};
    CredentialsHandler credHandler = (_url, _user, _cred) => creds;
    var fetchOpts = new FetchOptions { CredentialsProvider = credHandler };
    using (repo = new Repository(@"C:\project");)
    {
        repo.Network.Fetch(repo.Network.Remotes["origin"], fetchOpts);
    }
}

I could fetch from public repos on github as well as from password protected private repos on bitbucket; however, I couldn't do the same for the repositories hosted over LAN at work. Turns out they were configured in a way which does not accept `UsernamePasswordCredentials` provided by libgit2sharp. The following modification allowed me to fetch from repositories over LAN:

    CredentialsHandler credHandler = (_url, _user, _cred) => new DefaultCredentials();

(I'm trying to find out what is the exact difference between the two; if I get further insight into it, I'll update the answer.)

Problem

Here's the code I'm using to fetch: ``` public static void GitFetch() { var creds = new UsernamePasswordCredentials() {Username = "user", Password = "pass"}; var fetchOpts = new FetchOptions {Credentials = creds}; using (repo = new Repository(@"C:\project");) { repo.Network.Fetch(repo.Network.Remotes["origin"], fetchOpts); } } ``` but it fails during fetch with the following exception: ``` LibGit2Sharp.LibGit2SharpException: Too many redirects or authentication replays Result StackTrace: at LibGit2Sharp.Core.Ensure.HandleError(Int32 result) at LibGit2Sharp.Core.Proxy.git_remote_fetch(RemoteSafeHandle remote, Signature signature, String logMessage) at LibGit2Sharp.Network.DoFetch(RemoteSafeHandle remoteHandle, FetchOptions options, Signature signature, String logMessage) at LibGit2Sharp.Network.Fetch(Remote remote, FetchOptions options, Signature signature, String logMessage) ``` I have verified that the config file has the required remote name and that git fetch works from the command line. I found that the exception originates from `libgit2\src\transport\winhttp.c` but I couldn't come up with a workaround/solution.

Original source