UE上传图片

¶UE4上传图片

void UploadImageFromFile(FString FileName)
{
    // load image
    TArray<uint8> ImageData;
    FFileHelper::LoadFileToArray(ImageData, *FileName);
 
    TSharedRef<IHttpRequest> HttpRequest = FHttpModule::Get().CreateRequest();
    FString Boundary = "---------------------------" + FString::FromInt(FDateTime::Now().GetTicks());
    HttpRequest->SetHeader(TEXT("Content-Type"), FString(TEXT("multipart/form-data; boundary=")) + Boundary);
    HttpRequest->SetURL(TEXT("http://127.0.0.1/image/upload"));
    HttpRequest->SetVerb(TEXT("POST"));
 
    FString InFileFormat(TEXT(".jpg"));
    FString FileContents = FBase64::Encode(ImageData);
    FString HashStr = FMD5::HashAnsiString(*FileName);
 
    FString PrefixBoundry = "\r\n--" + Boundary + "\r\n";
 
    FString FileHeader = "Content-Disposition: form-data; name=\"file\"; filename=\"" + FileName
        + "\"\r\nContent-Type: " + InFileFormat
        + "\"\r\nmd5Sum: " + HashStr + "\r\n\r\n";
 
    FString SuffixBoundary = "\r\n--" + Boundary + "--\r\n";
 
    /*FString ContentsString = PrefixBoundry + FileHeader + FileContents + SuffixBoundary;
    HttpRequest->SetContentAsString(ContentsString);*/
 
    TArray<uint8> ContentArray;
    FString ContentsString = PrefixBoundry + FileHeader;
    ContentArray.Append((uint8*)TCHAR_TO_ANSI(*ContentsString), ContentsString.Len());
    ContentArray.Append(ImageData);
    ContentArray.Append((uint8*)TCHAR_TO_ANSI(*SuffixBoundary), SuffixBoundary.Len());
    HttpRequest->SetContent(ContentArray);
 
    //绑定回调
    HttpRequest->OnProcessRequestComplete().BindRaw(this, &HandleHttpRequestComplete, EHttpReqType::PostImage);
 
    //发送请求
    HttpRequest->ProcessRequest();
}

// ...
TArray<uint8> OutImageData = HttpResponse->GetContent();
UE_LOG(LogTemp, Warning, TEXT("Image Size = %d "), OutImageData.Num());
if (OutImageData.Num() <= 0)
    return;

EImageFormat TmepFormat = GetTargetImageFormat(Extension);

IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked <IImageWrapperModule>(FName("ImageWrapper"));
TSharedPtr<IImageWrapper> SourceImageWrapper = ImageWrapperModule.CreateImageWrapper(TmepFormat);

if (SourceImageWrapper.IsValid()
    && SourceImageWrapper->SetCompressed(OutImageData.GetData(), OutImageData.GetAllocatedSize()))
{
    TArray <uint8> UncompressedBGRA;
    if (SourceImageWrapper->GetRaw(ERGBFormat::BGRA, 8, UncompressedBGRA))
    {
        int32 Height = SourceImageWrapper->GetHeight();
        int32 Width = SourceImageWrapper->GetWidth();
        UTexture2D* InTexture = UTexture2D::CreateTransient(Width, Height, PF_B8G8R8A8);

        if (InTexture)
        {
            void* TextureData = InTexture->GetPlatformData()->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
            FMemory::Memcpy(TextureData, UncompressedBGRA.GetData(), UncompressedBGRA.Num());
            InTexture->GetPlatformData()->Mips[0].BulkData.Unlock();
            InTexture->UpdateResource();

            //
            TargetTexture = InTexture;
            OnGetTargetImage.ExecuteIfBound(TargetTexture);
        }
    }
}