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EFMDownloader

HTTP file downloading with progress tracking, speed monitoring, and multiple output modes.

Delegates​

FOnDownloadProgress​

DECLARE_DYNAMIC_DELEGATE_ThreeParams(FOnDownloadProgress, const FString&, URL, float, ProgressPercent, int64, BytesDownloaded)

FOnDownloadComplete​

DECLARE_DYNAMIC_DELEGATE_ThreeParams(FOnDownloadComplete, bool, bSuccess, const FString&, URL, const FString&, SavedPath)

FOnDownloadCompleteMemory​

DECLARE_DYNAMIC_DELEGATE_ThreeParams(FOnDownloadCompleteMemory, bool, bSuccess, const FString&, URL, const TArray<uint8>&, Data)

FOnDownloadJSONComplete​

DECLARE_DYNAMIC_DELEGATE_ThreeParams(FOnDownloadJSONComplete, bool, bSuccess, const FString&, URL, const FString&, JSONString)

FOnGetFileSizeComplete​

DECLARE_DYNAMIC_DELEGATE_ThreeParams(FOnGetFileSizeComplete, bool, bSuccess, const FString&, URL, int64, FileSize)

Functions​

DownloadFile​

Callable Downloads a file from a URL to disk.

C++

void DownloadFile(UObject* WorldContextObject, const FString& URL, const FString& SavePath,
    FOnDownloadProgress OnProgress, FOnDownloadComplete OnComplete)
ParameterTypeDescription
WorldContextObjectUObject*World context
URLFStringURL to download from
SavePathFStringFull path to save the downloaded file
OnProgressFOnDownloadProgressProgress callback (URL, percent, bytes)
OnCompleteFOnDownloadCompleteCompletion callback

Category: EFM|Download

Blueprint Node

ƒDownload File
URL
Save Path
On Progress
On Complete

DownloadFileToMemory​

Callable Downloads a file into memory.

C++

void DownloadFileToMemory(UObject* WorldContextObject, const FString& URL,
    FOnDownloadProgress OnProgress, FOnDownloadCompleteMemory OnComplete)

Category: EFM|Download

Blueprint Node

ƒDownload File To Memory
URL
On Progress
On Complete

DownloadJSON​

Callable Downloads and returns JSON string.

C++

void DownloadJSON(UObject* WorldContextObject, const FString& URL,
    FOnDownloadProgress OnProgress, FOnDownloadJSONComplete OnComplete)

Category: EFM|Download

Blueprint Node

ƒDownload JSON
URL
On Progress
On Complete

CancelDownload​

Callable Cancels an active download.

C++

void CancelDownload(const FString& URL)

Category: EFM|Download

Blueprint Node

ƒCancel Download
URL

IsDownloading​

Pure Checks if a URL is currently being downloaded.

C++

bool IsDownloading(const FString& URL)

Category: EFM|Download

Blueprint Node

ƒIs Downloading
URL
Return Value

GetDownloadSpeed​

Pure Gets the current download speed for a URL.

C++

float GetDownloadSpeed(const FString& URL)

Returns: Download speed (bytes/second)

Category: EFM|Download

Blueprint Node

ƒGet Download Speed
URL
Return Value

GetRemoteFileSize​

Callable Gets the size of a remote file without downloading it.

C++

void GetRemoteFileSize(UObject* WorldContextObject, const FString& URL, FOnGetFileSizeComplete OnComplete)

Category: EFM|Download

Blueprint Node

ƒGet Remote File Size
URL
On Complete

Example​

// Download with progress
DownloadFile(
  Self,
  "https://example.com/config.json",
  GetGameSavedDirectory() + "config.json",
  OnProgress(URL, ProgressPercent, BytesDownloadged):
    UpdateProgressBar(ProgressPercent)
    Log("Downloaded: " + BytesDownloadged + " bytes"),
  OnComplete(bSuccess, URL, SavedPath):
    if bSuccess:
      Log("Saved to: " + SavedPath)
    else:
      LogError("Download failed")
)

// Check if downloading
if IsDownloading("https://example.com/config.json"):
  Speed = GetDownloadSpeed("https://example.com/config.json")
  Log("Speed: " + Speed + " bytes/s")

// Get remote file size first
GetRemoteFileSize(Self, "https://example.com/largefile.zip", OnComplete)
  OnComplete(bSuccess, URL, FileSize):
    Log("Remote file size: " + FileSize + " bytes")