Working Http/Web Request Code-Snippet for C# Scripts

FiveM Resource Development Discussion
1

I do not feel that it warrants a full release, but here it is:

Just add the files to your resource which needs httprequests and call it with

Request r = new Request();
RequestResponse result = await r.Http(...);

returns a nice result object for you to handle.

6 Likes
2

:o did you just inadvertently end up using async ref calls by awaiting an export? nice

1 Like
3

Fixed the headers not being transmitted properly.

4

Update the Gist removed several Json serializations and deserializations which slow down the process enourmously.

Added also the Request class, which can you can use to get a C# nicely formatted webstuff back.

Request r = new Request();
RequestResponse result = r.Http(...);

enjoy.

5

It works great when running the resource on windows, but as soon as I switch to Linux there are a lot of errors which i can’t figure out how to solve… I’ve tested to make sure that this is actually causing it, and commenting out the code to perform my request removes the errors on runtime…

This is what I was getting at first: https://hastebin.com/pijuroqoso
Then, after adding System.Numerics.dll to the references of my resource, making it copy the dll to the output folder and adding it to the server_scripts section in my __resource.lua gave me this error instead:
https://hastebin.com/uxufodegub

Any clue what I’m doing wrong?

6

The format of the System.Numerics.dll did not coincide with the runtime, e.g. 32bit vs 64bit. Probably an MSIL image for just windows systems might be better.

7

I figured it out. A dll file is missing in the linux server artifacts, when copying it from my windows server artifacts to the linux server artifacts it works fine.

8

@zr0iq @Vespura Sorry to bump this thread after a long time, but I have a question about this helper class.

How does making requests this way differ from using the built-in HttpClient class in .NET?

In the plugin I’m writing, I hadn’t seen this gist (and HttpClient is how I’m used to doing web requests in my .NET projects at work), so I started using the HttpClient class, and so far, it’s worked fine.

Is there some pitfall of FiveM that this method solves, or something?

9

I know this is old but I didn’t want to create my own topic. I’m trying to use this to communicate with php on my website but I’m getting this error

InvokeNative: execution failed: No current resource manager.

Unhandled task exception: 
System.ArgumentException: Value does not fall within the expected range.





Server stack trace: 

  at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR (System.Int32 errorCode) [0x0000a] in <fbc4ec45371543bfba3678ebb82caf6d>:0 

  at (wrapper cominterop) CitizenFX.Core.IScriptHost.InvokeNative(intptr)

  at (wrapper cominterop-invoke) CitizenFX.Core.IScriptHost.InvokeNative(intptr)

  at CitizenFX.Core.MonoScriptRuntime+WrapScriptHost.InvokeNative (System.IntPtr context) [0x00000] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\MonoScriptRuntime.cs:361 

  at (wrapper remoting-invoke-with-check) CitizenFX.Core.MonoScriptRuntime+WrapScriptHost.InvokeNative(intptr)

  at (wrapper xdomain-dispatch) CitizenFX.Core.MonoScriptRuntime+WrapScriptHost.InvokeNative(object,byte[]&,byte[]&)



Exception rethrown at [0]: 

  at (wrapper xdomain-invoke) CitizenFX.Core.MonoScriptRuntime+WrapScriptHost.InvokeNative(intptr)

  at CitizenFX.Core.ScriptContext.InvokeInternal (CitizenFX.Core.fxScriptContext* cxt, System.UInt64 nativeIdentifier, CitizenFX.Core.IScriptHost scriptHost) [0x00007] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\ScriptContext.cs:348 

  at CitizenFX.Core.ScriptContext.InvokeInternal (System.UInt64 nativeIdentifier, CitizenFX.Core.IScriptHost scriptHost) [0x00015] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\ScriptContext.cs:335 

  at CitizenFX.Core.ScriptContext.Invoke (System.UInt64 nativeIdentifier, CitizenFX.Core.IScriptHost scriptHost) [0x00000] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\ScriptContext.cs:326 

  at CitizenFX.Core.Native.Function.InvokeInternal (CitizenFX.Core.Native.Hash nativeHash, System.Type returnType, CitizenFX.Core.Native.InputArgument[] args) [0x00024] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\Native.cs:28 

  at CitizenFX.Core.Native.Function.Call[T] (CitizenFX.Core.Native.Hash hash, CitizenFX.Core.Native.InputArgument[] arguments) [0x00000] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\Native.cs:11 

  at CitizenFX.Core.RemoteFunctionReference._InvokeNative (System.Byte[] argsSerialized) [0x00026] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\RemoteFunctionReference.cs:92 

  at CitizenFX.Core.RemoteFunctionReference.InvokeNative (System.Byte[] argsSerialized) [0x00000] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\RemoteFunctionReference.cs:72 

  at CitizenFX.Core.MsgPackDeserializer+<>c__DisplayClass36_0.<CreateRemoteFunctionReference>b__0 (System.Object[] args) [0x00007] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\MsgPackDeserializer.cs:267 

  at (wrapper dynamic-method) System.Object.CallSite.Target(System.Runtime.CompilerServices.Closure,System.Runtime.CompilerServices.CallSite,object,object[],bool)

  at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3[T0,T1,T2] (System.Runtime.CompilerServices.CallSite site, T0 arg0, T1 arg1, T2 arg2) [0x0011e] in <cf8f429092f345a6bd742c3476e00e06>:0 

  at CitizenFX.Core.FunctionReference+<>c__DisplayClass11_1.<Invoke>b__1 (System.Threading.Tasks.Task t) [0x00000] in C:\gl\builds\4ff63adb\0\cfx\fivem\code\client\clrcore\FunctionReference.cs:78 

  at System.Threading.Tasks.ContinuationTaskFromResultTask`1[TAntecedentResult].InnerInvoke () [0x00024] in <fbc4ec45371543bfba3678ebb82caf6d>:0 

  at System.Threading.Tasks.Task.Execute () [0x00000] in <fbc4ec45371543bfba3678ebb82caf6d>:0

here’s my code:

private void OnResourceStart(string name)
{
    if (GetCurrentResourceName() != name) return;
            
    RegisterCommand("test", new Action<int, List<object>, string>(async (source, args, raw) =>
    {
        string data = "test";

        Request r = new Request();
        RequestResponse result = await r.Http("url", "POST", data);
    }), false);
}

anyone know why this might be happening?

10

Hi, since the Gist is now down, does anyone have the original source code for HttpHelper.cs? It would be very helpful. When I use the WebRequest.Create() method in my client resource, it gives me a System.MethodAcessException, so I’m curious how it was worked around in the Gist.

1 Like
11

Can you reupload this please? The link doesnt work