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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
//
// URIStreamOpener.cpp
//
// Library: Foundation
// Package: URI
// Module: URIStreamOpener
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/URIStreamOpener.h"
#include "Poco/URIStreamFactory.h"
#include "Poco/FileStreamFactory.h"
#include "Poco/URI.h"
#include "Poco/Path.h"
#include "Poco/SingletonHolder.h"
#include "Poco/Exception.h"
namespace Poco {
URIStreamOpener::URIStreamOpener()
{
registerStreamFactory("file", new FileStreamFactory);
}
URIStreamOpener::~URIStreamOpener()
{
for (FactoryMap::iterator it = _map.begin(); it != _map.end(); ++it)
delete it->second;
}
std::istream* URIStreamOpener::open(const URI& uri) const
{
FastMutex::ScopedLock lock(_mutex);
std::string scheme;
if (uri.isRelative())
scheme = "file";
else
scheme = uri.getScheme();
return openURI(scheme, uri);
}
std::istream* URIStreamOpener::open(const std::string& pathOrURI) const
{
FastMutex::ScopedLock lock(_mutex);
try
{
URI uri(pathOrURI);
std::string scheme(uri.getScheme());
FactoryMap::const_iterator it = _map.find(scheme);
if (it != _map.end())
{
return openURI(scheme, uri);
}
else if (scheme.length() <= 1) // could be Windows path
{
Path path;
if (path.tryParse(pathOrURI, Path::PATH_GUESS))
{
return openFile(path);
}
}
throw UnknownURISchemeException(pathOrURI);
}
catch (URISyntaxException&)
{
Path path;
if (path.tryParse(pathOrURI, Path::PATH_GUESS))
return openFile(path);
else
throw;
}
}
std::istream* URIStreamOpener::open(const std::string& basePathOrURI, const std::string& pathOrURI) const
{
FastMutex::ScopedLock lock(_mutex);
try
{
URI uri(basePathOrURI);
std::string scheme(uri.getScheme());
FactoryMap::const_iterator it = _map.find(scheme);
if (it != _map.end())
{
uri.resolve(pathOrURI);
scheme = uri.getScheme();
return openURI(scheme, uri);
}
else if (scheme.length() <= 1) // could be Windows path
{
Path base;
Path path;
if (base.tryParse(basePathOrURI, Path::PATH_GUESS) && path.tryParse(pathOrURI, Path::PATH_GUESS))
{
base.resolve(path);
return openFile(base);
}
}
throw UnknownURISchemeException(basePathOrURI);
}
catch (URISyntaxException&)
{
Path base;
Path path;
if (base.tryParse(basePathOrURI, Path::PATH_GUESS) && path.tryParse(pathOrURI, Path::PATH_GUESS))
{
base.resolve(path);
return openFile(base);
}
else throw;
}
}
void URIStreamOpener::registerStreamFactory(const std::string& scheme, URIStreamFactory* pFactory)
{
poco_check_ptr (pFactory);
FastMutex::ScopedLock lock(_mutex);
if (_map.find(scheme) == _map.end())
{
_map[scheme] = pFactory;
}
else throw ExistsException("An URIStreamFactory for the given scheme has already been registered", scheme);
}
void URIStreamOpener::unregisterStreamFactory(const std::string& scheme)
{
FastMutex::ScopedLock lock(_mutex);
FactoryMap::iterator it = _map.find(scheme);
if (it != _map.end())
{
URIStreamFactory* pFactory = it->second;
_map.erase(it);
delete pFactory;
}
else throw NotFoundException("No URIStreamFactory has been registered for the given scheme", scheme);
}
bool URIStreamOpener::supportsScheme(const std::string& scheme)
{
FastMutex::ScopedLock lock(_mutex);
return _map.find(scheme) != _map.end();
}
namespace
{
static SingletonHolder<URIStreamOpener> sh;
}
URIStreamOpener& URIStreamOpener::defaultOpener()
{
return *sh.get();
}
std::istream* URIStreamOpener::openFile(const Path& path) const
{
FileStreamFactory factory;
return factory.open(path);
}
std::istream* URIStreamOpener::openURI(const std::string& scheme, const URI& uri) const
{
std::string actualScheme(scheme);
URI actualURI(uri);
int redirects = 0;
while (redirects < MAX_REDIRECTS)
{
try
{
FactoryMap::const_iterator it = _map.find(actualScheme);
if (it != _map.end())
return it->second->open(actualURI);
else if (redirects > 0)
throw UnknownURISchemeException(actualURI.toString() + std::string("; redirected from ") + uri.toString());
else
throw UnknownURISchemeException(actualURI.toString());
}
catch (URIRedirection& redir)
{
actualURI = redir.uri();
actualScheme = actualURI.getScheme();
++redirects;
}
}
throw TooManyURIRedirectsException(uri.toString());
}
} // namespace Poco
|
