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28 package org.apache.hc.client5.http.impl.routing;
29
30 import java.net.InetSocketAddress;
31 import java.net.Proxy;
32 import java.net.ProxySelector;
33 import java.net.URI;
34 import java.net.URISyntaxException;
35 import java.util.List;
36
37 import org.apache.hc.client5.http.SchemePortResolver;
38 import org.apache.hc.core5.annotation.Contract;
39 import org.apache.hc.core5.annotation.ThreadingBehavior;
40 import org.apache.hc.core5.http.HttpException;
41 import org.apache.hc.core5.http.HttpHost;
42 import org.apache.hc.core5.http.protocol.HttpContext;
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52 @Contract(threading = ThreadingBehavior.STATELESS)
53 public class SystemDefaultRoutePlanner extends DefaultRoutePlanner {
54
55 private final ProxySelector proxySelector;
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57
58
59
60 public SystemDefaultRoutePlanner(
61 final SchemePortResolver schemePortResolver,
62 final ProxySelector proxySelector) {
63 super(schemePortResolver);
64 this.proxySelector = proxySelector;
65 }
66
67
68
69
70 public SystemDefaultRoutePlanner(final ProxySelector proxySelector) {
71 this(null, proxySelector);
72 }
73
74 @Override
75 protected HttpHost determineProxy(final HttpHost target, final HttpContext context) throws HttpException {
76 final URI targetURI;
77 try {
78 targetURI = new URI(target.toURI());
79 } catch (final URISyntaxException ex) {
80 throw new HttpException("Cannot convert host to URI: " + target, ex);
81 }
82 ProxySelector proxySelectorInstance = this.proxySelector;
83 if (proxySelectorInstance == null) {
84 proxySelectorInstance = ProxySelector.getDefault();
85 }
86 if (proxySelectorInstance == null) {
87
88 return null;
89 }
90 final List<Proxy> proxies = proxySelectorInstance.select(targetURI);
91 final Proxy p = chooseProxy(proxies);
92 HttpHost result = null;
93 if (p.type() == Proxy.Type.HTTP) {
94
95 if (!(p.address() instanceof InetSocketAddress)) {
96 throw new HttpException("Unable to handle non-Inet proxy address: " + p.address());
97 }
98 final InetSocketAddress isa = (InetSocketAddress) p.address();
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100 result = new HttpHost(null, isa.getAddress(), isa.getHostString(), isa.getPort());
101 }
102
103 return result;
104 }
105
106 private Proxy chooseProxy(final List<Proxy> proxies) {
107 Proxy result = null;
108
109 for (int i=0; (result == null) && (i < proxies.size()); i++) {
110 final Proxy p = proxies.get(i);
111 switch (p.type()) {
112
113 case DIRECT:
114 case HTTP:
115 result = p;
116 break;
117
118 case SOCKS:
119
120
121 break;
122 }
123 }
124 if (result == null) {
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128 result = Proxy.NO_PROXY;
129 }
130 return result;
131 }
132
133 }