F# http reqeust with HttpClient

program.fs

// Learn more about F# at http://fsharp.org

open System
open System.Text
open System.Net.Http
open Rss

[<EntryPoint>]
let main argv =

    let doXmlStuff = async { 
            let client = new  HttpClient()
            let! response = client.GetByteArrayAsync("http://pablojuan.com/feed/")                         
                            |> Async.AwaitTask                                                     
            let content = Encoding.UTF8.GetString(response,0, (response.Length - 1))                 
           
            let parsedStuff = deserializeXml content 
            do printfn "%s" parsedStuff.channel.title
            return ()               
        }

    doXmlStuff |> Async.RunSynchronously        
    0 // return an integer exit code

rss.xml

module Rss 

    open System.IO
    open System.Text
    open System.Xml
    open System.Xml.Serialization    

    [<CLIMutable>]
    type RssItem = {
        title:string; 
        link:string;
        description:string;
        author:string;
        category:string option;
        enclosure: string option;
        guid: string option;
        pubDate: string option;
        source: string option;
      }

    [<CLIMutable>]
    type RssChannel = {
        title:string;
        link:string;
        description:string;
        language: string option;
        copyright: string option;
        managingEditor: string option;
        webMaster: string option;
        pubDate: string option;
        lastBuildDate: string option;
        category:string option;
        generator:string option;
        docs: string option;
        cloud: string option;
        ttl: string option;
        image: string option;
        textInput: string option;
        skipHours: string option;
        skipDays: string option;
        item:  RssItem[];
        }

    [<CLIMutable>]        
    type Rss = {channel: RssChannel}
   
    let deserializeXml str =
        let root = XmlRootAttribute("rss")
        let serializer = XmlSerializer(typeof<Rss>,root)
        use reader = new StringReader(str)
        serializer.Deserialize reader :?> Rss

Sample.fsproj

<Project Sdk="FSharp.NET.Sdk;Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp1.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Compile Include="rss.fs" />
    <Compile Include="Program.fs" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="FSharp.Core" Version="4.1.*" />
    <PackageReference Include="FSharp.NET.Sdk" Version="1.0.*" PrivateAssets="All" /> 
    <!-- You need to add this for System.Net.Http to work. After adding this do a dotnet restore --> 
    <PackageReference Include="System.Net.Http" Version="4.3.*" />
    <PackageReference Include="System.Xml.XmlSerializer" Version="4.3.*" />
  </ItemGroup>

</Project>

In this line in Rss.fs:

item: RssItem[];

removing the [] returns the first item. I'm now working on adding all items to that array as you noted.

@awright18

This was the issue (Mitch solved it):

        [<XmlElement>]
        item:  RssItem[];

You had to add that notation. :) It is now working as expected.

I will now take this code and port it over to Nikeza. Thanks to all who helped!