private static async Task GenerateQRCodeAsync(LinkBundle linkDocument, HttpRequest req, Binder binder)
{
req.Headers.TryGetValue("Origin", out StringValues origin);
Url generator = new Url($"{origin.ToString()}/{linkDocument.VanityUrl}");
string payload = generator.ToString();
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(payload, QRCodeGenerator.ECCLevel.Q);
PngByteQRCode qrCode = new PngByteQRCode(qrCodeData);
byte[] qrCodeAsPngByteArr = qrCode.GetGraphic(20);
var attributes = new Attribute[]
{
new BlobAttribute(blobPath: $"{QRCODECONTAINER}/{linkDocument.VanityUrl}.png", FileAccess.Write),
new StorageAccountAttribute("AzureWebJobsStorage")
};
using (var writer = await binder.BindAsync <CloudBlobStream>(attributes).ConfigureAwait(false))
{
writer.Write(qrCodeAsPngByteArr);
}
}
private static void EnsureVanityUrl(LinkBundle linkDocument)
{
if (string.IsNullOrWhiteSpace(linkDocument.VanityUrl))
{
var code = new char[7];
var rng = new RNGCryptoServiceProvider();
var bytes = new byte[sizeof(uint)];
for (int i = 0; i < code.Length; i++)
{
rng.GetBytes(bytes);
uint num = BitConverter.ToUInt32(bytes, 0) % (uint)CHARACTERS.Length;
code[i] = CHARACTERS[(int)num];
}
linkDocument.VanityUrl = new String(code);
telemetryClient.TrackEvent(new EventTelemetry {
Name = "Custom Vanity Generated"
});
}
// force lowercase
linkDocument.VanityUrl = linkDocument.VanityUrl.ToLower();
}
private static bool ValidatePayLoad(LinkBundle linkDocument, HttpRequest req, out ProblemDetails problems)
{
bool isValid = (linkDocument != null) && linkDocument.Links.Count() > 0;
problems = null;
if (!isValid)
{
problems = new ProblemDetails()
{
Title = "Payload is invalid",
Detail = "No links provided",
Status = StatusCodes.Status400BadRequest,
Type = "/linkylink/clientissue",
Instance = req.Path
};
}
return(isValid);
}
public IActionResult GetLinks(
[HttpTrigger(AuthorizationLevel.Function, "GET", Route = "links/{vanityUrl}")] HttpRequest req,
[CosmosDB(
databaseName: "linkylinkdb",
collectionName: "linkbundles",
ConnectionStringSetting = "LinkLinkConnection",
SqlQuery = "SELECT * FROM linkbundles lb WHERE LOWER(lb.vanityUrl) = LOWER({vanityUrl})"
)] IEnumerable <LinkBundle> documents,
string vanityUrl,
ILogger log)
{
if (!documents.Any())
{
log.LogInformation($"Bundle for {vanityUrl} not found.");
return(new NotFoundResult());
}
LinkBundle doc = documents.Single();
return(new OkObjectResult(doc));
}
public async Task <IActionResult> UpdateList(
[HttpTrigger(AuthorizationLevel.Function, "PATCH", Route = "links/{vanityUrl}")] HttpRequest req,
[CosmosDB(
databaseName: "linkylinkdb",
collectionName: "linkbundles",
ConnectionStringSetting = "LinkLinkConnection",
SqlQuery = "SELECT * FROM linkbundles lb WHERE LOWER(lb.vanityUrl) = LOWER({vanityUrl})"
)] IEnumerable <LinkBundle> documents,
[CosmosDB(ConnectionStringSetting = "LinkLinkConnection")] IDocumentClient docClient,
string vanityUrl,
ILogger log)
{
string handle = GetAccountInfo().HashedID;
if (string.IsNullOrEmpty(handle))
{
return(new UnauthorizedResult());
}
if (!documents.Any())
{
log.LogInformation($"Bundle for {vanityUrl} not found.");
return(new NotFoundResult());
}
try
{
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
if (string.IsNullOrEmpty(requestBody))
{
log.LogError("Request body is empty.");
return(new BadRequestResult());
}
JsonPatchDocument <LinkBundle> patchDocument = JsonConvert.DeserializeObject <JsonPatchDocument <LinkBundle> >(requestBody);
if (!patchDocument.Operations.Any())
{
log.LogError("Request body contained no operations.");
return(new NoContentResult());
}
LinkBundle bundle = documents.Single();
patchDocument.ApplyTo(bundle);
Uri collUri = UriFactory.CreateDocumentCollectionUri("linkylinkdb", "linkbundles");
RequestOptions reqOptions = new RequestOptions {
PartitionKey = new PartitionKey(vanityUrl)
};
await docClient.UpsertDocumentAsync(collUri, bundle, reqOptions);
}
catch (JsonSerializationException ex)
{
log.LogError(ex, ex.Message);
return(new BadRequestResult());
}
catch (Exception ex)
{
log.LogError(ex, ex.Message);
return(new StatusCodeResult(StatusCodes.Status500InternalServerError));
}
return(new NoContentResult());
}
