1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* Copyright 2015-2017 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "BaseEntity.h"
#include "Json.h"
#include "net/Download.h"
#include "net/HttpMetaCache.h"
#include "net/NetJob.h"
#include "Env.h"
#include "Json.h"
class ParsingValidator : public Net::Validator
{
public: /* con/des */
ParsingValidator(Meta::BaseEntity *entity) : m_entity(entity)
{
};
virtual ~ParsingValidator()
{
};
public: /* methods */
bool init(QNetworkRequest &) override
{
return true;
}
bool write(QByteArray & data) override
{
this->data.append(data);
return true;
}
bool abort() override
{
return true;
}
bool validate(QNetworkReply &) override
{
auto fname = m_entity->localFilename();
try
{
m_entity->parse(Json::requireObject(Json::requireDocument(data, fname), fname));
return true;
}
catch (Exception &e)
{
qWarning() << "Unable to parse response:" << e.cause();
return false;
}
}
private: /* data */
QByteArray data;
Meta::BaseEntity *m_entity;
};
Meta::BaseEntity::~BaseEntity()
{
}
QUrl Meta::BaseEntity::url() const
{
return QUrl("https://meta.multimc.org").resolved(localFilename());
}
bool Meta::BaseEntity::loadLocalFile()
{
const QString fname = QDir("meta").absoluteFilePath(localFilename());
if (!QFile::exists(fname))
{
return false;
}
// TODO: check if the file has the expected checksum
try
{
parse(Json::requireObject(Json::requireDocument(fname, fname), fname));
return true;
}
catch (Exception &e)
{
qDebug() << QString("Unable to parse file %1: %2").arg(fname, e.cause());
// just make sure it's gone and we never consider it again.
QFile::remove(fname);
return false;
}
}
void Meta::BaseEntity::load()
{
// load local file if nothing is loaded yet
if(!isLoaded())
{
if(loadLocalFile())
{
m_loadStatus = LoadStatus::Local;
}
}
// if we need remote update, run the update task
if(!shouldStartRemoteUpdate())
{
return;
}
NetJob *job = new NetJob(QObject::tr("Download of meta file %1").arg(localFilename()));
auto url = this->url();
auto entry = ENV.metacache()->resolveEntry("meta", localFilename());
entry->setStale(true);
auto dl = Net::Download::makeCached(url, entry);
/*
* The validator parses the file and loads it into the object.
* If that fails, the file is not written to storage.
*/
dl->addValidator(new ParsingValidator(this));
job->addNetAction(dl);
m_updateStatus = UpdateStatus::InProgress;
m_updateTask.reset(job);
QObject::connect(job, &NetJob::succeeded, [&]()
{
m_loadStatus = LoadStatus::Remote;
m_updateStatus = UpdateStatus::Succeeded;
m_updateTask.reset();
});
QObject::connect(job, &NetJob::failed, [&]()
{
m_updateStatus = UpdateStatus::Failed;
m_updateTask.reset();
});
m_updateTask->start();
}
bool Meta::BaseEntity::isLoaded() const
{
return m_loadStatus > LoadStatus::NotLoaded;
}
bool Meta::BaseEntity::shouldStartRemoteUpdate() const
{
// TODO: version-locks and offline mode?
return m_updateStatus != UpdateStatus::InProgress;
}
shared_qobject_ptr<Task> Meta::BaseEntity::getCurrentTask()
{
if(m_updateStatus == UpdateStatus::InProgress)
{
return m_updateTask;
}
return nullptr;
}
#include "BaseEntity.moc"
|
