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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> *</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> */</em> |
| <a name="19" href="#19">19</a> <strong class="jxr_keyword">package</strong> org.apache.shiro.io; |
| <a name="20" href="#20">20</a> |
| <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.shiro.util.ClassUtils; |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger; |
| <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory; |
| <a name="24" href="#24">24</a> |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.io.FileInputStream; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.io.IOException; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.io.InputStream; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.net.URL; |
| <a name="29" href="#29">29</a> |
| <a name="30" href="#30">30</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * Static helper methods for loading {@code Stream}-backed resources.</em> |
| <a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * @see #getInputStreamForPath(String)</em> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * @since 0.2</em> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="36" href="#36">36</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/shiro/io/ResourceUtils.html">ResourceUtils</a> { |
| <a name="37" href="#37">37</a> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * Resource path prefix that specifies to load from a classpath location, value is <b>{@code classpath:}</b></em> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="41" href="#41">41</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CLASSPATH_PREFIX = <span class="jxr_string">"classpath:"</span>; |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * Resource path prefix that specifies to load from a url location, value is <b>{@code url:}</b></em> |
| <a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="45" href="#45">45</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String URL_PREFIX = <span class="jxr_string">"url:"</span>; |
| <a name="46" href="#46">46</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * Resource path prefix that specifies to load from a file location, value is <b>{@code file:}</b></em> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="49" href="#49">49</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String FILE_PREFIX = <span class="jxr_string">"file:"</span>; |
| <a name="50" href="#50">50</a> |
| <a name="51" href="#51">51</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * Private internal log instance.</em> |
| <a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="54" href="#54">54</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger log = LoggerFactory.getLogger(ResourceUtils.<strong class="jxr_keyword">class</strong>); |
| <a name="55" href="#55">55</a> |
| <a name="56" href="#56">56</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * Prevent instantiation.</em> |
| <a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="59" href="#59">59</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/apache/shiro/io/ResourceUtils.html">ResourceUtils</a>() { |
| <a name="60" href="#60">60</a> } |
| <a name="61" href="#61">61</a> |
| <a name="62" href="#62">62</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="63" href="#63">63</a> <em class="jxr_javadoccomment"> * Returns {@code true} if the resource path is not null and starts with one of the recognized</em> |
| <a name="64" href="#64">64</a> <em class="jxr_javadoccomment"> * resource prefixes ({@link #CLASSPATH_PREFIX CLASSPATH_PREFIX},</em> |
| <a name="65" href="#65">65</a> <em class="jxr_javadoccomment"> * {@link #URL_PREFIX URL_PREFIX}, or {@link #FILE_PREFIX FILE_PREFIX}), {@code false} otherwise.</em> |
| <a name="66" href="#66">66</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * @param resourcePath the resource path to check</em> |
| <a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> * @return {@code true} if the resource path is not null and starts with one of the recognized</em> |
| <a name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * resource prefixes, {@code false} otherwise.</em> |
| <a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * @since 0.9</em> |
| <a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="72" href="#72">72</a> @SuppressWarnings({<span class="jxr_string">"UnusedDeclaration"</span>}) |
| <a name="73" href="#73">73</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> hasResourcePrefix(String resourcePath) { |
| <a name="74" href="#74">74</a> <strong class="jxr_keyword">return</strong> resourcePath != <strong class="jxr_keyword">null</strong> && |
| <a name="75" href="#75">75</a> (resourcePath.startsWith(CLASSPATH_PREFIX) || |
| <a name="76" href="#76">76</a> resourcePath.startsWith(URL_PREFIX) || |
| <a name="77" href="#77">77</a> resourcePath.startsWith(FILE_PREFIX)); |
| <a name="78" href="#78">78</a> } |
| <a name="79" href="#79">79</a> |
| <a name="80" href="#80">80</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="81" href="#81">81</a> <em class="jxr_javadoccomment"> * Returns {@code true} if the resource at the specified path exists, {@code false} otherwise. This</em> |
| <a name="82" href="#82">82</a> <em class="jxr_javadoccomment"> * method supports scheme prefixes on the path as defined in {@link #getInputStreamForPath(String)}.</em> |
| <a name="83" href="#83">83</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="84" href="#84">84</a> <em class="jxr_javadoccomment"> * @param resourcePath the path of the resource to check.</em> |
| <a name="85" href="#85">85</a> <em class="jxr_javadoccomment"> * @return {@code true} if the resource at the specified path exists, {@code false} otherwise.</em> |
| <a name="86" href="#86">86</a> <em class="jxr_javadoccomment"> * @since 0.9</em> |
| <a name="87" href="#87">87</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="88" href="#88">88</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> resourceExists(String resourcePath) { |
| <a name="89" href="#89">89</a> InputStream stream = <strong class="jxr_keyword">null</strong>; |
| <a name="90" href="#90">90</a> <strong class="jxr_keyword">boolean</strong> exists = false; |
| <a name="91" href="#91">91</a> |
| <a name="92" href="#92">92</a> <strong class="jxr_keyword">try</strong> { |
| <a name="93" href="#93">93</a> stream = getInputStreamForPath(resourcePath); |
| <a name="94" href="#94">94</a> exists = <strong class="jxr_keyword">true</strong>; |
| <a name="95" href="#95">95</a> } <strong class="jxr_keyword">catch</strong> (IOException e) { |
| <a name="96" href="#96">96</a> stream = <strong class="jxr_keyword">null</strong>; |
| <a name="97" href="#97">97</a> } <strong class="jxr_keyword">finally</strong> { |
| <a name="98" href="#98">98</a> <strong class="jxr_keyword">if</strong> (stream != <strong class="jxr_keyword">null</strong>) { |
| <a name="99" href="#99">99</a> <strong class="jxr_keyword">try</strong> { |
| <a name="100" href="#100">100</a> stream.close(); |
| <a name="101" href="#101">101</a> } <strong class="jxr_keyword">catch</strong> (IOException ignored) { |
| <a name="102" href="#102">102</a> } |
| <a name="103" href="#103">103</a> } |
| <a name="104" href="#104">104</a> } |
| <a name="105" href="#105">105</a> |
| <a name="106" href="#106">106</a> <strong class="jxr_keyword">return</strong> exists; |
| <a name="107" href="#107">107</a> } |
| <a name="108" href="#108">108</a> |
| <a name="109" href="#109">109</a> |
| <a name="110" href="#110">110</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="111" href="#111">111</a> <em class="jxr_javadoccomment"> * Returns the InputStream for the resource represented by the specified path, supporting scheme</em> |
| <a name="112" href="#112">112</a> <em class="jxr_javadoccomment"> * prefixes that direct how to acquire the input stream</em> |
| <a name="113" href="#113">113</a> <em class="jxr_javadoccomment"> * ({@link #CLASSPATH_PREFIX CLASSPATH_PREFIX},</em> |
| <a name="114" href="#114">114</a> <em class="jxr_javadoccomment"> * {@link #URL_PREFIX URL_PREFIX}, or {@link #FILE_PREFIX FILE_PREFIX}). If the path is not prefixed by one</em> |
| <a name="115" href="#115">115</a> <em class="jxr_javadoccomment"> * of these schemes, the path is assumed to be a file-based path that can be loaded with a</em> |
| <a name="116" href="#116">116</a> <em class="jxr_javadoccomment"> * {@link FileInputStream FileInputStream}.</em> |
| <a name="117" href="#117">117</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="118" href="#118">118</a> <em class="jxr_javadoccomment"> * @param resourcePath the String path representing the resource to obtain.</em> |
| <a name="119" href="#119">119</a> <em class="jxr_javadoccomment"> * @return the InputStraem for the specified resource.</em> |
| <a name="120" href="#120">120</a> <em class="jxr_javadoccomment"> * @throws IOException if there is a problem acquiring the resource at the specified path.</em> |
| <a name="121" href="#121">121</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="122" href="#122">122</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> InputStream getInputStreamForPath(String resourcePath) <strong class="jxr_keyword">throws</strong> IOException { |
| <a name="123" href="#123">123</a> |
| <a name="124" href="#124">124</a> InputStream is; |
| <a name="125" href="#125">125</a> <strong class="jxr_keyword">if</strong> (resourcePath.startsWith(CLASSPATH_PREFIX)) { |
| <a name="126" href="#126">126</a> is = loadFromClassPath(stripPrefix(resourcePath)); |
| <a name="127" href="#127">127</a> |
| <a name="128" href="#128">128</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (resourcePath.startsWith(URL_PREFIX)) { |
| <a name="129" href="#129">129</a> is = loadFromUrl(stripPrefix(resourcePath)); |
| <a name="130" href="#130">130</a> |
| <a name="131" href="#131">131</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (resourcePath.startsWith(FILE_PREFIX)) { |
| <a name="132" href="#132">132</a> is = loadFromFile(stripPrefix(resourcePath)); |
| <a name="133" href="#133">133</a> |
| <a name="134" href="#134">134</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="135" href="#135">135</a> is = loadFromFile(resourcePath); |
| <a name="136" href="#136">136</a> } |
| <a name="137" href="#137">137</a> |
| <a name="138" href="#138">138</a> <strong class="jxr_keyword">if</strong> (is == <strong class="jxr_keyword">null</strong>) { |
| <a name="139" href="#139">139</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Resource ["</span> + resourcePath + <span class="jxr_string">"] could not be found."</span>); |
| <a name="140" href="#140">140</a> } |
| <a name="141" href="#141">141</a> |
| <a name="142" href="#142">142</a> <strong class="jxr_keyword">return</strong> is; |
| <a name="143" href="#143">143</a> } |
| <a name="144" href="#144">144</a> |
| <a name="145" href="#145">145</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> InputStream loadFromFile(String path) <strong class="jxr_keyword">throws</strong> IOException { |
| <a name="146" href="#146">146</a> <strong class="jxr_keyword">if</strong> (log.isDebugEnabled()) { |
| <a name="147" href="#147">147</a> log.debug(<span class="jxr_string">"Opening file ["</span> + path + <span class="jxr_string">"]..."</span>); |
| <a name="148" href="#148">148</a> } |
| <a name="149" href="#149">149</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> FileInputStream(path); |
| <a name="150" href="#150">150</a> } |
| <a name="151" href="#151">151</a> |
| <a name="152" href="#152">152</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> InputStream loadFromUrl(String urlPath) <strong class="jxr_keyword">throws</strong> IOException { |
| <a name="153" href="#153">153</a> log.debug(<span class="jxr_string">"Opening url {}"</span>, urlPath); |
| <a name="154" href="#154">154</a> URL url = <strong class="jxr_keyword">new</strong> URL(urlPath); |
| <a name="155" href="#155">155</a> <strong class="jxr_keyword">return</strong> url.openStream(); |
| <a name="156" href="#156">156</a> } |
| <a name="157" href="#157">157</a> |
| <a name="158" href="#158">158</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> InputStream loadFromClassPath(String path) { |
| <a name="159" href="#159">159</a> log.debug(<span class="jxr_string">"Opening resource from class path [{}]"</span>, path); |
| <a name="160" href="#160">160</a> <strong class="jxr_keyword">return</strong> ClassUtils.getResourceAsStream(path); |
| <a name="161" href="#161">161</a> } |
| <a name="162" href="#162">162</a> |
| <a name="163" href="#163">163</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> String stripPrefix(String resourcePath) { |
| <a name="164" href="#164">164</a> <strong class="jxr_keyword">return</strong> resourcePath.substring(resourcePath.indexOf(<span class="jxr_string">":"</span>) + 1); |
| <a name="165" href="#165">165</a> } |
| <a name="166" href="#166">166</a> |
| <a name="167" href="#167">167</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="168" href="#168">168</a> <em class="jxr_javadoccomment"> * Convenience method that closes the specified {@link InputStream InputStream}, logging any</em> |
| <a name="169" href="#169">169</a> <em class="jxr_javadoccomment"> * {@link IOException IOException} that might occur. If the {@code InputStream}</em> |
| <a name="170" href="#170">170</a> <em class="jxr_javadoccomment"> * argument is {@code null}, this method does nothing. It returns quietly in all cases.</em> |
| <a name="171" href="#171">171</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="172" href="#172">172</a> <em class="jxr_javadoccomment"> * @param is the {@code InputStream} to close, logging any {@code IOException} that might occur.</em> |
| <a name="173" href="#173">173</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="174" href="#174">174</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> close(InputStream is) { |
| <a name="175" href="#175">175</a> <strong class="jxr_keyword">if</strong> (is != <strong class="jxr_keyword">null</strong>) { |
| <a name="176" href="#176">176</a> <strong class="jxr_keyword">try</strong> { |
| <a name="177" href="#177">177</a> is.close(); |
| <a name="178" href="#178">178</a> } <strong class="jxr_keyword">catch</strong> (IOException e) { |
| <a name="179" href="#179">179</a> log.warn(<span class="jxr_string">"Error closing input stream."</span>, e); |
| <a name="180" href="#180">180</a> } |
| <a name="181" href="#181">181</a> } |
| <a name="182" href="#182">182</a> } |
| <a name="183" href="#183">183</a> } |
| </pre> |
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