Azure Functions: How to Handle Large Payloads in Durable Functions with HTTP Triggers?
This might be a silly question, but This might be a silly question, but I'm currently working on an Azure Durable Function that is triggered by an HTTP request and is supposed to handle large JSON payloads (around 5MB)... I've defined the function like this: ```csharp [FunctionName("OrchestratorFunction")] public static async Task RunOrchestrator( [OrchestrationTrigger] IDurableOrchestrationContext context) { var input = context.GetInput<MyInputType>(); await context.CallActivityAsync("ActivityFunction", input); } [FunctionName("ActivityFunction")] public static string ActivityFunction([ActivityTrigger] MyInputType input, ILogger log) { log.LogInformation("Processing input: {input}", input); // Process the input... return "Success"; } [FunctionName("HttpStart")] public static async Task<HttpResponseMessage> HttpStart( [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequestMessage req, [DurableClient] IDurableOrchestrationClient starter, ILogger log) { log.LogInformation("HTTP trigger function processed a request."); } ``` However, when I try sending a large payload, I receive a `413 Payload Too Large` error. I've considered breaking the payload into smaller chunks, but that seems cumbersome and not ideal for my use case. I have also tried adjusting the `maxRequestBodySize` in the `host.json` file like so: ```json { "http": { "maxRequestBodySize": 10485760 // 10MB } } ``` After updating this value, the error persists. I’ve also ensured that my function app is configured to use the latest version of the Azure Functions runtime (v3.0). Is there a recommended approach or best practice for processing large payloads in Azure Durable Functions? Would it be advisable to use services like Azure Blob Storage to handle the payloads instead, and if so, how would I implement that in my current workflow? Any guidance would be greatly appreciated! This is part of a larger web app I'm building. Is there a better approach? For reference, this is a production application. Hoping someone can shed some light on this.