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Add aws lambda support #359
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>net5.0</TargetFramework> | ||
| <Description>AWS Lambda-Fable adapter that generates routes for shared server spec with a Fable client. Client must use Fable.Remoting.Client</Description> | ||
| <PackageProjectUrl>https://github.com/Zaid-Ajaj/Fable.Remoting</PackageProjectUrl> | ||
| <RepositoryUrl>https://github.com/Zaid-Ajaj/Fable.Remoting.git</RepositoryUrl> | ||
| <PackageLicenseUrl>https://github.com/Zaid-Ajaj/Fable.Remoting/blob/master/LICENSE</PackageLicenseUrl> | ||
| <PackageIconUrl></PackageIconUrl> | ||
| <PackageTags>fsharp;fable;remoting;rpc;webserver;serverless;azure functions</PackageTags> | ||
| <Authors>Zaid Ajaj;Roman Provaznik</Authors> | ||
| <Version>1.11.0</Version> | ||
| <GenerateDocumentationFile>true</GenerateDocumentationFile> | ||
| <PackageReleaseNotes>Update Microsoft.IO.RecyclableMemoryStream to v3.0</PackageReleaseNotes> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <Compile Include="FableLambdaAdapter.fs" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <ProjectReference Include="..\Fable.Remoting.Server\Fable.Remoting.Server.fsproj" /> | ||
| </ItemGroup> | ||
| <Import Project="..\.paket\Paket.Restore.targets" /> | ||
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| </Project> |
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| namespace Fable.Remoting.AwsLambda.Worker | ||
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| open System | ||
| open System.Net | ||
| open System.Text | ||
| open System.Threading.Tasks | ||
| open System.IO | ||
| open Fable.Remoting.Server | ||
| open Fable.Remoting.Server.Proxy | ||
| open Amazon.Lambda.APIGatewayEvents | ||
| open Newtonsoft.Json | ||
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| type HttpRequestData = APIGatewayHttpApiV2ProxyRequest | ||
| type HttpResponseData = APIGatewayHttpApiV2ProxyResponse | ||
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| module private FuncsUtil = | ||
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| let private htmlString (html: string) (req: HttpRequestData) : Task<HttpResponseData option> = | ||
| task { | ||
| let resp = HttpResponseData(StatusCode = int HttpStatusCode.OK, Body = html) | ||
| resp.SetHeaderValues("Content-Type", "text/html; charset=utf-8", false) | ||
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| return Some resp | ||
| } | ||
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| let text (str: string) (req: HttpRequestData) : Task<HttpResponseData option> = | ||
| task { | ||
| let resp = HttpResponseData(StatusCode = int HttpStatusCode.OK, Body = str) | ||
| resp.SetHeaderValues("Content-Type", "text/plain; charset=utf-8", false) | ||
| return Some resp | ||
| } | ||
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| let private path (r: HttpRequestData) = r.RawPath | ||
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| let setJsonBody | ||
| (res: HttpResponseData) | ||
| (response: obj) | ||
| (logger: Option<string -> unit>) | ||
| (req: HttpRequestData) | ||
| : Task<HttpResponseData option> = | ||
| task { | ||
| use ms = new MemoryStream() | ||
| jsonSerialize response ms | ||
| let responseBody = System.Text.Encoding.UTF8.GetString(ms.ToArray()) | ||
| Diagnostics.outputPhase logger responseBody | ||
| res.SetHeaderValues("Content-Type", "application/json; charset=utf-8", false) | ||
| res.Body <- responseBody | ||
| return Some res | ||
| } | ||
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| /// Handles thrown exceptions | ||
| let fail | ||
| (ex: exn) | ||
| (routeInfo: RouteInfo<HttpRequestData>) | ||
| (options: RemotingOptions<HttpRequestData, 't>) | ||
| (req: HttpRequestData) | ||
| : Task<HttpResponseData option> = | ||
| let resp = HttpResponseData(StatusCode = int HttpStatusCode.InternalServerError) | ||
| let logger = options.DiagnosticsLogger | ||
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| match options.ErrorHandler with | ||
| | None -> setJsonBody resp (Errors.unhandled routeInfo.methodName) logger req | ||
| | Some errorHandler -> | ||
| match errorHandler ex routeInfo with | ||
| | Ignore -> setJsonBody resp (Errors.ignored routeInfo.methodName) logger req | ||
| | Propagate error -> setJsonBody resp (Errors.propagated error) logger req | ||
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| let halt: HttpResponseData option = None | ||
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| let buildFromImplementation<'impl> | ||
| (implBuilder: HttpRequestData -> 'impl) | ||
| (options: RemotingOptions<HttpRequestData, 'impl>) | ||
| = | ||
| let proxy = makeApiProxy options | ||
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| let rmsManager = | ||
| options.RmsManager | ||
| |> Option.defaultWith (fun _ -> recyclableMemoryStreamManager.Value) | ||
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| fun (req: HttpRequestData) -> | ||
| task { | ||
| let isProxyHeaderPresent = req.Headers.Keys.Contains "x-remoting-proxy" | ||
| use output = rmsManager.GetStream "remoting-output-stream" | ||
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| let isBinaryEncoded = | ||
| match req.Headers.TryGetValue "Content-Type" with | ||
| | true, "application/octet-stream" -> true | ||
| | _ -> false | ||
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| let bodyAsStream = | ||
| if String.IsNullOrEmpty req.Body then | ||
| new MemoryStream() | ||
| else | ||
| new MemoryStream(Encoding.UTF8.GetBytes(req.Body)) | ||
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| let props = | ||
| { ImplementationBuilder = (fun () -> implBuilder req) | ||
| EndpointName = path req | ||
| Input = bodyAsStream | ||
| IsProxyHeaderPresent = isProxyHeaderPresent | ||
| HttpVerb = req.RequestContext.Http.Method.ToUpper() | ||
| IsContentBinaryEncoded = isBinaryEncoded | ||
| Output = output } | ||
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| match! proxy props with | ||
| | Success isBinaryOutput -> | ||
| let resp = HttpResponseData(StatusCode = int HttpStatusCode.OK) | ||
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| if isBinaryOutput && isProxyHeaderPresent then | ||
| resp.SetHeaderValues("Content-Type", "application/octet-stream", false) | ||
| elif options.ResponseSerialization = SerializationType.Json then | ||
| resp.SetHeaderValues("Content-Type", "application/json; charset=utf-8", false) | ||
| else | ||
| resp.SetHeaderValues("Content-Type", "application/msgpack", false) | ||
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| let result = Encoding.UTF8.GetString(output.ToArray()) | ||
| resp.Body <- result | ||
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| return Some resp | ||
| | Exception(e, functionName, requestBodyText) -> | ||
| let routeInfo = | ||
| { methodName = functionName | ||
| path = path req | ||
| httpContext = req | ||
| requestBodyText = requestBodyText } | ||
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| return! fail e routeInfo options req | ||
| | InvalidHttpVerb -> return halt | ||
| | EndpointNotFound -> | ||
| match req.RequestContext.Http.Method.ToUpper(), options.Docs with | ||
| | "GET", (Some docsUrl, Some docs) when docsUrl = (path req) -> | ||
| let (Documentation(docsName, docsRoutes)) = docs | ||
| let schema = Docs.makeDocsSchema typeof<'impl> docs options.RouteBuilder | ||
| let docsApp = DocsApp.embedded docsName docsUrl schema | ||
| return! htmlString docsApp req | ||
| | "OPTIONS", (Some docsUrl, Some docs) when | ||
| sprintf "/%s/$schema" docsUrl = (path req) | ||
| || sprintf "%s/$schema" docsUrl = (path req) | ||
| -> | ||
| let schema = Docs.makeDocsSchema typeof<'impl> docs options.RouteBuilder | ||
| let serializedSchema = schema.ToString(Formatting.None) | ||
| return! text serializedSchema req | ||
| | _ -> return halt | ||
| } | ||
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| module Remoting = | ||
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| /// Builds a HttpRequestData -> HttpResponseData option function from the given implementation and options | ||
| /// Please see HttpResponseData.fromRequestHandler for using output of this function | ||
| let buildRequestHandler (options: RemotingOptions<HttpRequestData, 't>) = | ||
| match options.Implementation with | ||
| | StaticValue impl -> FuncsUtil.buildFromImplementation (fun _ -> impl) options | ||
| | FromContext createImplementationFrom -> FuncsUtil.buildFromImplementation createImplementationFrom options | ||
| | Empty -> fun _ -> Task.FromResult None | ||
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| module FunctionsRouteBuilder = | ||
| /// Default RouteBuilder for Azure Functions running HttpTrigger on /api prefix | ||
| let apiPrefix = sprintf "/api/%s/%s" | ||
| /// RouteBuilder for Azure Functions running HttpTrigger without any prefix | ||
| let noPrefix = sprintf "/%s/%s" | ||
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| module HttpResponseData = | ||
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| /// Build HttpResponseData from single builder function and HttpRequestData | ||
| let fromRequestHandler | ||
| (req: HttpRequestData) | ||
| (fn: HttpRequestData -> Task<HttpResponseData option>) | ||
| : Task<HttpResponseData> = | ||
| task { | ||
| match! fn req with | ||
| | Some r -> return r | ||
| | None -> return HttpResponseData(StatusCode = int HttpStatusCode.NotFound, Body = "") | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| group AwsLambda | ||
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| FSharp.Core | ||
| Amazon.Lambda.APIGatewayEvents |
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I've aliased the AWS types for parity with the Azure Functions implementation to make comparison easier, but they don't need to remain.