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cpp-ue4.helpers-header.mustache Maven / Gradle / Ivy
{{>licenseInfo}}
#pragma once
#include "{{modelNamePrefix}}BaseModel.h"
#include "Serialization/JsonSerializer.h"
#include "Dom/JsonObject.h"
#include "Misc/Base64.h"
#include "PlatformHttp.h"
class IHttpRequest;
{{#cppNamespaceDeclarations}}
namespace {{this}}
{
{{/cppNamespaceDeclarations}}
typedef TSharedRef> JsonWriter;
//////////////////////////////////////////////////////////////////////////
class {{dllapi}} HttpFileInput
{
public:
explicit HttpFileInput(const TCHAR* InFilePath);
explicit HttpFileInput(const FString& InFilePath);
// This will automatically set the content type if not already set
void SetFilePath(const TCHAR* InFilePath);
void SetFilePath(const FString& InFilePath);
// Optional if it can be deduced from the FilePath
void SetContentType(const TCHAR* ContentType);
HttpFileInput& operator=(const HttpFileInput& Other) = default;
HttpFileInput& operator=(const FString& InFilePath) { SetFilePath(*InFilePath); return*this; }
HttpFileInput& operator=(const TCHAR* InFilePath) { SetFilePath(InFilePath); return*this; }
const FString& GetFilePath() const { return FilePath; }
const FString& GetContentType() const { return ContentType; }
// Returns the filename with extension
FString GetFilename() const;
private:
FString FilePath;
FString ContentType;
};
//////////////////////////////////////////////////////////////////////////
class HttpMultipartFormData
{
public:
void SetBoundary(const TCHAR* InBoundary);
void SetupHttpRequest(const FHttpRequestRef& HttpRequest);
void AddStringPart(const TCHAR* Name, const TCHAR* Data);
void AddJsonPart(const TCHAR* Name, const FString& JsonString);
void AddBinaryPart(const TCHAR* Name, const TArray& ByteArray);
void AddFilePart(const TCHAR* Name, const HttpFileInput& File);
private:
void AppendString(const TCHAR* Str);
const FString& GetBoundary() const;
mutable FString Boundary;
TArray FormData;
static const TCHAR* Delimiter;
static const TCHAR* Newline;
};
//////////////////////////////////////////////////////////////////////////
// Decodes Base64Url encoded strings, see https://en.wikipedia.org/wiki/Base64#Variants_summary_table
template
bool Base64UrlDecode(const FString& Base64String, T& Value)
{
FString TmpCopy(Base64String);
TmpCopy.ReplaceInline(TEXT("-"), TEXT("+"));
TmpCopy.ReplaceInline(TEXT("_"), TEXT("/"));
return FBase64::Decode(TmpCopy, Value);
}
// Encodes strings in Base64Url, see https://en.wikipedia.org/wiki/Base64#Variants_summary_table
template
FString Base64UrlEncode(const T& Value)
{
FString Base64String = FBase64::Encode(Value);
Base64String.ReplaceInline(TEXT("+"), TEXT("-"));
Base64String.ReplaceInline(TEXT("/"), TEXT("_"));
return Base64String;
}
template
inline auto ToString(const T& Value)
-> typename std::enable_if::value, FString>::type
{
return ::LexToString(Value);
}
template
inline auto ToString(const T& EnumModelValue)
-> typename std::enable_if::value, FString>::type
{
return T::EnumToString(EnumModelValue.Value);
}
inline FString ToString(const Model& Value)
{
FString String;
JsonWriter Writer = TJsonWriterFactory<>::Create(&String);
Value.WriteJson(Writer);
Writer->Close();
return String;
}
inline FString ToString(const FDateTime& Value)
{
return Value.ToIso8601();
}
inline FString ToString(const FGuid& Value)
{
return Value.ToString(EGuidFormats::DigitsWithHyphens);
}
inline FString ToString(const TArray& Value)
{
return FBase64::Encode(Value);
}
template
inline FString ToUrlString(const T& Value)
{
return FPlatformHttp::UrlEncode(ToString(Value));
}
inline FString ToUrlString(const TArray& Value)
{
return Base64UrlEncode(Value);
}
template
inline FString CollectionToUrlString(const TArray& Collection, const TCHAR* Separator)
{
FString Output;
if(Collection.Num() == 0)
return Output;
Output += ToUrlString(Collection[0]);
for(int i = 1; i < Collection.Num(); i++)
{
Output += FString::Format(TEXT("{0}{1}"), { Separator, *ToUrlString(Collection[i]) });
}
return Output;
}
template
inline FString CollectionToUrlString_csv(const TArray& Collection, const TCHAR* BaseName)
{
return CollectionToUrlString(Collection, TEXT(","));
}
template
inline FString CollectionToUrlString_ssv(const TArray& Collection, const TCHAR* BaseName)
{
return CollectionToUrlString(Collection, TEXT(" "));
}
template
inline FString CollectionToUrlString_tsv(const TArray& Collection, const TCHAR* BaseName)
{
return CollectionToUrlString(Collection, TEXT("\t"));
}
template
inline FString CollectionToUrlString_pipes(const TArray& Collection, const TCHAR* BaseName)
{
return CollectionToUrlString(Collection, TEXT("|"));
}
template
inline FString CollectionToUrlString_multi(const TArray& Collection, const TCHAR* BaseName)
{
FString Output;
if(Collection.Num() == 0)
return Output;
Output += FString::Format(TEXT("{0}={1}"), { FStringFormatArg(BaseName), ToUrlString(Collection[0]) });
for(int i = 1; i < Collection.Num(); i++)
{
Output += FString::Format(TEXT("&{0}={1}"), { FStringFormatArg(BaseName), ToUrlString(Collection[i]) });
}
return Output;
}
template
inline FString CollectionToUrlString_multi(const TSet& Collection, const TCHAR* BaseName)
{
FString Output;
if (Collection.Num() == 0)
{
return Output;
}
int32 Index = 0;
for (typename TSet::TConstIterator Iter = Collection.CreateConstIterator(); Iter; ++Iter)
{
if (Index == 0)
{
Output += FString::Format(TEXT("{0}={1}"), { FStringFormatArg(BaseName), ToUrlString(*Iter) });
Index++;
continue;
}
Output += FString::Format(TEXT("&{0}={1}"), { FStringFormatArg(BaseName), ToUrlString(*Iter) });
}
return Output;
}
//////////////////////////////////////////////////////////////////////////
inline void WriteJsonValue(JsonWriter& Writer, const TSharedPtr& Value)
{
if (Value.IsValid())
{
FJsonSerializer::Serialize(Value.ToSharedRef(), "", Writer, false);
}
else
{
Writer->WriteObjectStart();
Writer->WriteObjectEnd();
}
}
inline void WriteJsonValue(JsonWriter& Writer, const TSharedPtr& Value)
{
if (Value.IsValid())
{
FJsonSerializer::Serialize(Value.ToSharedRef(), Writer, false);
}
else
{
Writer->WriteObjectStart();
Writer->WriteObjectEnd();
}
}
inline void WriteJsonValue(JsonWriter& Writer, const TArray& Value)
{
Writer->WriteValue(FBase64::Encode(Value));
}
inline void WriteJsonValue(JsonWriter& Writer, const FDateTime& Value)
{
Writer->WriteValue(Value.ToIso8601());
}
inline void WriteJsonValue(JsonWriter& Writer, const FGuid& Value)
{
Writer->WriteValue(Value.ToString(EGuidFormats::DigitsWithHyphens));
}
inline void WriteJsonValue(JsonWriter& Writer, const Model& Value)
{
Value.WriteJson(Writer);
}
template::value, int>::type = 0>
inline void WriteJsonValue(JsonWriter& Writer, const T& Value)
{
Writer->WriteValue(Value);
}
template
inline void WriteJsonValue(JsonWriter& Writer, const TArray& Value)
{
Writer->WriteArrayStart();
for (const auto& Element : Value)
{
WriteJsonValue(Writer, Element);
}
Writer->WriteArrayEnd();
}
template
inline void WriteJsonValue(JsonWriter& Writer, const TMap& Value)
{
Writer->WriteObjectStart();
for (const auto& It : Value)
{
Writer->WriteIdentifierPrefix(It.Key);
WriteJsonValue(Writer, It.Value);
}
Writer->WriteObjectEnd();
}
//////////////////////////////////////////////////////////////////////////
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, FString& Value)
{
FString TmpValue;
if (JsonValue->TryGetString(TmpValue))
{
Value = TmpValue;
return true;
}
else
return false;
}
{{dllapi}} bool ParseDateTime(const FString& DateTimeString, FDateTime& OutDateTime);
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, FDateTime& Value)
{
FString TmpValue;
if (JsonValue->TryGetString(TmpValue))
{
return ParseDateTime(TmpValue, Value);
}
else
return false;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, FGuid& Value)
{
FString TmpValue;
if (JsonValue->TryGetString(TmpValue))
{
return FGuid::Parse(TmpValue, Value);
}
else
return false;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, bool& Value)
{
bool TmpValue;
if (JsonValue->TryGetBool(TmpValue))
{
Value = TmpValue;
return true;
}
else
return false;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, TSharedPtr& JsonObjectValue)
{
JsonObjectValue = JsonValue;
return true;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, TSharedPtr& JsonObjectValue)
{
const TSharedPtr* Object;
if (JsonValue->TryGetObject(Object))
{
JsonObjectValue = *Object;
return true;
}
return false;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, TArray& Value)
{
FString TmpValue;
if (JsonValue->TryGetString(TmpValue))
{
FBase64::Decode(TmpValue, Value);
return true;
}
else
return false;
}
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, Model& Value)
{
return Value.FromJson(JsonValue);
}
template::value, int>::type = 0>
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, T& Value)
{
T TmpValue;
if (JsonValue->TryGetNumber(TmpValue))
{
Value = TmpValue;
return true;
}
else
return false;
}
template
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, TArray& ArrayValue)
{
const TArray>* JsonArray;
if (JsonValue->TryGetArray(JsonArray))
{
bool ParseSuccess = true;
const int32 Count = JsonArray->Num();
ArrayValue.Reset(Count);
for (int i = 0; i < Count; i++)
{
T TmpValue;
ParseSuccess &= TryGetJsonValue((*JsonArray)[i], TmpValue);
ArrayValue.Emplace(MoveTemp(TmpValue));
}
return ParseSuccess;
}
return false;
}
template
inline bool TryGetJsonValue(const TSharedPtr& JsonValue, TMap& MapValue)
{
const TSharedPtr* Object;
if (JsonValue->TryGetObject(Object))
{
MapValue.Reset();
bool ParseSuccess = true;
for (const auto& It : (*Object)->Values)
{
T TmpValue;
ParseSuccess &= TryGetJsonValue(It.Value, TmpValue);
MapValue.Emplace(It.Key, MoveTemp(TmpValue));
}
return ParseSuccess;
}
return false;
}
template
inline bool TryGetJsonValue(const TSharedPtr& JsonObject, const FString& Key, T& Value)
{
const TSharedPtr JsonValue = JsonObject->TryGetField(Key);
if (JsonValue.IsValid() && !JsonValue->IsNull())
{
return TryGetJsonValue(JsonValue, Value);
}
return false;
}
template
inline bool TryGetJsonValue(const TSharedPtr& JsonObject, const FString& Key, TOptional& OptionalValue)
{
const TSharedPtr JsonValue = JsonObject->TryGetField(Key);
if (JsonValue.IsValid() && !JsonValue->IsNull())
{
T Value;
if (TryGetJsonValue(JsonValue, Value))
{
OptionalValue = Value;
return true;
}
else
return false;
}
// Absence of optional value is not a parsing error.
// Nullable is handled like optional.
return true;
}
{{#cppNamespaceDeclarations}}
}
{{/cppNamespaceDeclarations}}
