LeechCraft  0.6.70-13729-g7046a9d2a7
Modular cross-platform feature rich live environment.
handlenetworkreply.h
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29 
30 #pragma once
31 
32 #include <QNetworkReply>
33 #include <util/sll/slotclosure.h>
34 #include <util/sll/either.h>
35 #include <util/sll/overload.h>
36 #include <util/sll/void.h>
37 #include <util/sll/typelist.h>
38 #include <util/threads/futures.h>
39 #include "networkconfig.h"
40 
41 namespace LC
42 {
43 namespace Util
44 {
45  template<typename F>
46  void HandleNetworkReply (QObject *context, QNetworkReply *reply, F f)
47  {
49  {
50  [reply, f]
51  {
52  reply->deleteLater ();
53  f (reply->readAll ());
54  },
55  reply,
56  SIGNAL (finished ()),
57  context
58  };
59  }
60 
61  template<typename>
62  struct ErrorInfo;
63 
64  template<typename>
65  struct ResultInfo;
66 
68  {
69  QByteArray Data_;
70  QHash<QByteArray, QList<QByteArray>> Headers_;
71 
72  explicit ReplyWithHeaders (QNetworkReply*);
73  };
74 
76  {
77  QNetworkReply::NetworkError Error_;
78  QString ErrorString_;
79 
80  QVariant HttpStatusCode_;
81 
82  explicit ReplyError (QNetworkReply*);
83  };
84 
85  template<typename... Args>
86  auto HandleReply (QNetworkReply *reply, QObject *context)
87  {
88  using Err = Find<ErrorInfo, Util::Void, Args...>;
89  using Res = Find<ResultInfo, QByteArray, Args...>;
90 
91  using Result_t = Util::Either<Err, Res>;
93  promise.reportStarted ();
94 
95  QObject::connect (reply,
96  &QNetworkReply::finished,
97  context,
98  [promise, reply] () mutable
99  {
100  reply->deleteLater ();
101 
102  if constexpr (std::is_same_v<Res, QByteArray>)
103  Util::ReportFutureResult (promise, Result_t::Right (reply->readAll ()));
104  else if constexpr (std::is_same_v<Res, ReplyWithHeaders>)
105  Util::ReportFutureResult (promise, Result_t::Right (Res { reply }));
106  else
107  static_assert (std::is_same_v<Res, struct Dummy>, "Unsupported reply type");
108  });
109  QObject::connect (reply,
110  Util::Overload<QNetworkReply::NetworkError> (&QNetworkReply::error),
111  context,
112  [promise, reply] () mutable
113  {
114  reply->deleteLater ();
115 
116  auto report = [&] (const Err& val) { Util::ReportFutureResult (promise, Result_t::Left (val)); };
117 
118  if constexpr (std::is_same_v<Err, QString>)
119  report (reply->errorString ());
120  else if constexpr (std::is_same_v<Err, Util::Void>)
121  report ({});
122  else if constexpr (std::is_same_v<Err, ReplyError>)
123  report (Err { reply });
124  else
125  static_assert (std::is_same_v<Err, struct Dummy>, "Unsupported error type");
126  });
127 
128  return promise.future ();
129  }
130 
131  template<typename... Args>
132  auto HandleReplySeq (QNetworkReply *reply, QObject *context)
133  {
134  return Sequence (context, HandleReply<Args...> (reply, context));
135  }
136 }
137 }
auto HandleReply(QNetworkReply *reply, QObject *context)
QHash< QByteArray, QList< QByteArray > > Headers_
constexpr detail::ExprTree< detail::ExprType::LeafStaticPlaceholder, detail::MemberPtrs< Ptr > > f
Definition: oral.h:955
typename detail::Find< Name, Def, Args... >::type Find
Definition: typelist.h:197
Executes a given functor upon a signal (or a list of signals).
Definition: slotclosure.h:100
void HandleNetworkReply(QObject *context, QNetworkReply *reply, F f)
QNetworkReply::NetworkError Error_
#define UTIL_NETWORK_API
Definition: networkconfig.h:37
auto HandleReplySeq(QNetworkReply *reply, QObject *context)
Definition: constants.h:35
A proper void type, akin to unit (or ()) type in functional languages.
Definition: void.h:41