public static async Task RunOpenPr(
[QueueTrigger("openprmessage")] OpenPrMessage openPrMessage,
[Table("installation", "{InstallationId}", "{RepoName}")] Installation installation,
TraceWriter log,
ExecutionContext context)
{
if (installation == null)
{
throw new Exception($"No installation found for InstallationId: {installation.InstallationId}");
}
var installationTokenParameters = new InstallationTokenParameters
{
AccessTokensUrl = installation.AccessTokensUrl,
AppId = KnownGitHubs.AppId,
};
var installationToken = await InstallationToken.GenerateAsync(
installationTokenParameters,
File.OpenText(Path.Combine(context.FunctionDirectory, $"..\\{KnownGitHubs.AppPrivateKey}")));
await PullRequest.OpenAsync(new PullRequestParameters
{
Password = installationToken.Token,
RepoName = installation.RepoName,
RepoOwner = installation.Owner,
});
}
public static async Task RunInstallationMessage(
[QueueTrigger("installationmessage")] InstallationMessage installationMessage,
[Table("installation")] ICollector <Installation> installations,
[Table("installation", "{InstallationId}", "{RepoName}")] Installation installation,
[Queue("openprmessage")] ICollector <OpenPrMessage> openPrMessages,
TraceWriter log,
ExecutionContext context)
{
// if not already installed
if (installation == null)
{
installations.Add(new Installation(installationMessage.InstallationId, installationMessage.RepoName)
{
AccessTokensUrl = installationMessage.AccessTokensUrl,
CloneUrl = installationMessage.CloneUrl,
Owner = installationMessage.Owner,
});
}
var installationTokenParameters = new InstallationTokenParameters
{
AccessTokensUrl = installationMessage.AccessTokensUrl,
AppId = KnownGitHubs.AppId,
};
// good for ~10 minutes
var installationToken = await InstallationToken.GenerateAsync(
installationTokenParameters,
File.OpenText(Path.Combine(context.FunctionDirectory, $"..\\{KnownGitHubs.AppPrivateKey}")));
var compressImagesParameters = new CompressimagesParameters
{
CloneUrl = installationMessage.CloneUrl,
LocalPath = LocalPath.CloneDir(Environment.GetEnvironmentVariable("TMP"), installationMessage.RepoName),
Password = installationToken.Token,
RepoName = installationMessage.RepoName,
RepoOwner = installationMessage.Owner,
PgpPrivateKeyStream = File.OpenRead(Path.Combine(context.FunctionDirectory, $"..\\{KnownGitHubs.PGPPrivateKeyFilename}")),
PgPPassword = File.ReadAllText(Path.Combine(context.FunctionDirectory, $"..\\{KnownGitHubs.PGPPasswordFilename}"))
};
var didCompress = CompressImages.Run(compressImagesParameters);
if (didCompress)
{
openPrMessages.Add(new OpenPrMessage
{
InstallationId = installationMessage.InstallationId,
RepoName = installationMessage.RepoName,
});
}
}
public static async Task <InstallationToken> GenerateAsync(InstallationTokenParameters input, StreamReader privateKeyReader)
{
var jwtPayload = new
{
iat = (int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds,
exp = (int)(DateTime.UtcNow.AddMinutes(9) - new DateTime(1970, 1, 1)).TotalSeconds,
iss = input.AppId,
};
var header = new { alg = "RS256", typ = "JWT" };
var headerBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(header, Formatting.None));
var payloadBytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(jwtPayload, Formatting.None));
var segments = new List <string>
{
Base64UrlEncode(headerBytes),
Base64UrlEncode(payloadBytes),
};
var stringToSign = string.Join(".", segments);
var bytesToSign = Encoding.UTF8.GetBytes(stringToSign);
ISigner signer = SignerUtilities.GetSigner("SHA-256withRSA");
AsymmetricCipherKeyPair keyPair;
using (privateKeyReader)
{
keyPair = (AsymmetricCipherKeyPair) new PemReader(privateKeyReader).ReadObject();
}
signer.Init(true, keyPair.Private);
signer.BlockUpdate(bytesToSign, 0, bytesToSign.Length);
var sigBytes = signer.GenerateSignature();
segments.Add(Base64UrlEncode(sigBytes));
var jwttoken = string.Join(".", segments);
using (var http = new HttpClient())
{
http.DefaultRequestHeaders.Add("Accept", "application/vnd.github.machine-man-preview+json");
http.DefaultRequestHeaders.Add("User-Agent", "ImgBot");
http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", jwttoken);
var result = await http.PostAsync(input.AccessTokensUrl, null);
var json = await result.Content.ReadAsStringAsync();
return(JsonConvert.DeserializeObject <InstallationToken>(json));
}
}