UE4上传图片

先记录下：

 1 void UploadImageFromFile(FString FileName)
 2 {
 3     // load image
 4     TArray<uint8> ImageData;
 5     FFileHelper::LoadFileToArray(ImageData, *FileName);
 6 
 7     TSharedRef<IHttpRequest> HttpRequest = FHttpModule::Get().CreateRequest();
 8     FString Boundary = "---------------------------" + FString::FromInt(FDateTime::Now().GetTicks());
 9     HttpRequest->SetHeader(TEXT("Content-Type"), FString(TEXT("multipart/form-data; boundary=")) + Boundary);
10     HttpRequest->SetURL(TEXT("http://127.0.0.1/image/upload"));
11     HttpRequest->SetVerb(TEXT("POST"));
12 
13     FString InFileFormat(TEXT(".jpg"));
14     FString FileContents = FBase64::Encode(ImageData);
15     FString HashStr = FMD5::HashAnsiString(*FileName);
16 
17     FString PrefixBoundry = "\r\n--" + Boundary + "\r\n";
20 
21     FString FileHeader = "Content-Disposition: form-data; name=\"file\"; filename=\"" + FileName
22         + "\"\r\nContent-Type: " + InFileFormat
23         + "\"\r\nmd5Sum: " + HashStr + "\r\n\r\n";
24 
25     FString SuffixBoundary = "\r\n--" + Boundary + "--\r\n";
26 
27     /*FString ContentsString = PrefixBoundry + FileHeader + FileContents + SuffixBoundary;
28     HttpRequest->SetContentAsString(ContentsString);*/
29 
30     TArray<uint8> ContentArray;
31     FString ContentsString = PrefixBoundry + FileHeader;
32     ContentArray.Append((uint8*)TCHAR_TO_ANSI(*ContentsString), ContentsString.Len());
33     ContentArray.Append(ImageData);
34     ContentArray.Append((uint8*)TCHAR_TO_ANSI(*SuffixBoundary), SuffixBoundary.Len());
35     HttpRequest->SetContent(ContentArray);
36 
37     //绑定回调
38     HttpRequest->OnProcessRequestComplete().BindRaw(this, &HandleHttpRequestComplete, EHttpReqType::PostImage);
39 
40     //发送请求
41     HttpRequest->ProcessRequest();
42 }

 

在获取图片后需要将返回的数据流转化为图片信息：

 1 　　　　　// ...
 2 　　　　　TArray<uint8> OutImageData = HttpResponse->GetContent();
 3         UE_LOG(LogTemp, Warning, TEXT("Image Size = %d "), OutImageData.Num());
 4         if (OutImageData.Num() <= 0)
 5             return;
 6 
 7         EImageFormat TmepFormat = GetTargetImageFormat(Extension);
 8 
 9         IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked <IImageWrapperModule>(FName("ImageWrapper"));
10         TSharedPtr<IImageWrapper> SourceImageWrapper = ImageWrapperModule.CreateImageWrapper(TmepFormat);
11         
12         if (SourceImageWrapper.IsValid() 
13             && SourceImageWrapper->SetCompressed(OutImageData.GetData(), OutImageData.GetAllocatedSize()))
14         {
15             TArray <uint8> UncompressedBGRA;
16             if (SourceImageWrapper->GetRaw(ERGBFormat::BGRA, 8, UncompressedBGRA))
17             {
18                 int32 Height = SourceImageWrapper->GetHeight();
19                 int32 Width = SourceImageWrapper->GetWidth();
20                 UTexture2D* InTexture = UTexture2D::CreateTransient(Width, Height, PF_B8G8R8A8);
21                 
22                 if (InTexture)
23                 {
24                     void* TextureData = InTexture->GetPlatformData()->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
25                     FMemory::Memcpy(TextureData, UncompressedBGRA.GetData(), UncompressedBGRA.Num());                    
26                     InTexture->GetPlatformData()->Mips[0].BulkData.Unlock();
27                     InTexture->UpdateResource();
28 
29                     //
30                     TargetTexture = InTexture;
31                     OnGetTargetImage.ExecuteIfBound(TargetTexture);
32                 }
33             }
34         }

 

posted @ 2022-05-30 18:32  sev  阅读(422)  评论(0)  编辑  收藏  举报