【UE4学习】16_http访问PHP获得Json测试

来源：互联网发布：淘宝正义哥编辑：程序博客网时间：2024/06/03 15:24

简介

本文主要通过http访问php获取json包进行小测试，该源码是以插件形式编写，此处记录主要部分的源码。

通过 json php sql，可以实现登录，数值交互等功能。

环境：

win10 64bit
UE4.15

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1. .cs 加入需要调用的模块HTTP、Json

PublicDependencyModuleNames.AddRange(new string[]{"Core","CoreUObject","Engine",                                        "HTTP",                                        "Json"// ... add other public dependencies that you statically link with here ...});

2. .h头文件类声明，主要暴露给蓝图用，记得包行Http.h 和 json.h

UCLASS(BlueprintType, Blueprintable)class JSONPLUGIN_API UJsonFunction : public UObject{GENERATED_UCLASS_BODY()UFUNCTION(BlueprintCallable, Category = "MyJson2")virtual void MyHttpCall(FString URL);UFUNCTION(BlueprintCallable, Category = "MyJson2")static UJsonFunction* ConstructJsonObject();void OnRequestReceived(FHttpRequestPtr request, FHttpResponsePtr response, bool bWasSuccessful);};

3. .cpp实现

UJsonFunction* UJsonFunction::ConstructJsonObject(){return NewObject<UJsonFunction>();}void UJsonFunction::MyHttpCall(FString URL){TSharedRef<IHttpRequest> request = FHttpModule::Get().CreateRequest();GEngine->AddOnScreenDebugMessage(1, 2.0f, FColor::Green, FString::Printf(TEXT("%s"), *URL));request->SetVerb("GET");request->SetURL(URL);//request->SetHeader(TEXT("Content-Type"), TEXT("application/json; charset=utf-8"));request->OnProcessRequestComplete().BindUObject(this, &UJsonFunction::OnRequestReceived);request->ProcessRequest();}void UJsonFunction::OnRequestReceived(FHttpRequestPtr request, FHttpResponsePtr response, bool bWasSuccessful){TSharedPtr<FJsonObject> jsonObj;TSharedRef<TJsonReader<>> jsonReader = TJsonReaderFactory<>::Create(response->GetContentAsString());if (!bWasSuccessful) {UE_LOG(LogJson, Error, TEXT("Response was invalid! Please check the URL."));// Broadcast the failed eventreturn;}FString result = response->GetContentAsString();GEngine->AddOnScreenDebugMessage(1, 2.0f, FColor::Green, FString::Printf(TEXT("%s"), *result));UE_LOG(LogTemp, Warning, TEXT("Json:   %s"), *result);if (FJsonSerializer::Deserialize(jsonReader, jsonObj)){int32 recievedInt = jsonObj->GetIntegerField("myRank");GEngine->AddOnScreenDebugMessage(1, 2.0f, FColor::Green, FString::FromInt(recievedInt));UE_LOG(LogTemp, Warning, TEXT("myRank:   %d"), recievedInt);FString name = jsonObj->GetStringField("name2");GEngine->AddOnScreenDebugMessage(1, 2.0f, FColor::Green, name);UE_LOG(LogTemp, Warning, TEXT("myRank:   %s"), *name);}}

4. php部分的代码

<?php//get_userinfo.phpif(date_default_timezone_get() != "Asia/Shanghai") {date_default_timezone_set("Asia/Shanghai");}$func=$_GET['fun'];if ('search'==$func) {$arrayName = array('myRank' =>12 ,'name2'=>"PHP Json Test.");echo json_encode($arrayName);?>

5.效果

给自己的源码（点击打开链接）

参考：

https://wiki.unrealengine.com/JSON_Query

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