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my-network-proxy-factory.cpp
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1 /*
2  * Copied from
3  * https://codereview.qt-project.org/cat/29453%2C6%2Csrc/network/kernel/qnetworkproxy_libproxy.cpp%5E0
4  *
5  * With minor modifications by
6  * Alberto Mardegan <alberto.mardegan@canonical.com>
7  */
8 
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49 
51 
52 #include <QNetworkProxy>
53 
54 #include <QtCore/QByteArray>
55 #include <QtCore/QUrl>
56 
57 #include <proxy.h>
58 
59 class QLibProxyWrapper
60 {
61 public:
62  QLibProxyWrapper()
63  : factory(px_proxy_factory_new())
64  {
65  }
66 
67  ~QLibProxyWrapper()
68  {
69  px_proxy_factory_free(factory);
70  }
71 
72  QList<QUrl> getProxies(const QUrl &url);
73 
74 private:
75  pxProxyFactory *factory;
76 };
77 
78 Q_GLOBAL_STATIC(QLibProxyWrapper, libProxyWrapper);
79 
80 /*
81  Gets the list of proxies from libproxy, converted to QUrl list.
82  Thread safe, according to libproxy documentation.
83 */
84 QList<QUrl> QLibProxyWrapper::getProxies(const QUrl &url)
85 {
86  QList<QUrl> ret;
87 
88  if (factory) {
89  char **proxies = px_proxy_factory_get_proxies(factory, url.toEncoded());
90  if (proxies) {
91  for (int i = 0; proxies[i]; i++) {
92  ret.append(QUrl::fromEncoded(proxies[i]));
93  free(proxies[i]);
94  }
95  free(proxies);
96  }
97  }
98 
99  return ret;
100 }
101 
103 {
104  QList<QNetworkProxy> proxyList;
105 
106  QUrl queryUrl;
107  QNetworkProxy::Capabilities requiredCapabilities(0);
108  switch (query.queryType()) {
109  //URL requests are directly supported by libproxy
110  case QNetworkProxyQuery::UrlRequest:
111  queryUrl = query.url();
112  break;
113  // fake URLs to get libproxy to tell us the SOCKS proxy
114  case QNetworkProxyQuery::TcpSocket:
115  queryUrl.setScheme(QLatin1String("tcp"));
116  queryUrl.setHost(query.peerHostName());
117  queryUrl.setPort(query.peerPort());
118  requiredCapabilities |= QNetworkProxy::TunnelingCapability;
119  break;
120  case QNetworkProxyQuery::UdpSocket:
121  queryUrl.setScheme(QLatin1String("udp"));
122  queryUrl.setHost(query.peerHostName());
123  queryUrl.setPort(query.peerPort());
124  requiredCapabilities |= QNetworkProxy::UdpTunnelingCapability;
125  break;
126  default:
127  proxyList.append(QNetworkProxy(QNetworkProxy::NoProxy));
128  return proxyList;
129  }
130 
131  QList<QUrl> rawProxies = libProxyWrapper()->getProxies(queryUrl);
132 
133  bool haveDirectConnection = false;
134  foreach (const QUrl& url, rawProxies) {
135  QNetworkProxy::ProxyType type;
136  if (url.scheme() == QLatin1String("http")) {
137  type = QNetworkProxy::HttpProxy;
138  } else if (url.scheme() == QLatin1String("socks")
139  || url.scheme() == QLatin1String("socks5")) {
140  type = QNetworkProxy::Socks5Proxy;
141  } else if (url.scheme() == QLatin1String("ftp")) {
142  type = QNetworkProxy::FtpCachingProxy;
143  } else if (url.scheme() == QLatin1String("direct")) {
144  type = QNetworkProxy::NoProxy;
145  haveDirectConnection = true;
146  } else {
147  continue; //unsupported proxy type e.g. socks4
148  }
149 
150  QNetworkProxy proxy(type,
151  url.host(),
152  url.port(),
153  url.userName(),
154  url.password());
155 
156  if ((proxy.capabilities() & requiredCapabilities) == requiredCapabilities)
157  proxyList.append(proxy);
158  }
159 
160  // fallback is direct connection
161  if (proxyList.isEmpty() || !haveDirectConnection)
162  proxyList.append(QNetworkProxy(QNetworkProxy::NoProxy));
163 
164  return proxyList;
165 }
QList< QNetworkProxy > queryProxy(const QNetworkProxyQuery &query=QNetworkProxyQuery())
Q_GLOBAL_STATIC(QLibProxyWrapper, libProxyWrapper)