1 | package wjhk.jupload2.upload.helper;
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2 |
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3 | import java.io.IOException;
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4 | import java.io.PushbackInputStream;
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5 | import java.util.regex.Matcher;
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6 | import java.util.regex.Pattern;
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7 |
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8 | import wjhk.jupload2.exception.JUploadEOFException;
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9 | import wjhk.jupload2.exception.JUploadException;
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10 | import wjhk.jupload2.exception.JUploadIOException;
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11 | import wjhk.jupload2.policies.UploadPolicy;
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12 |
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13 | /**
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14 | * A helper, to read the response coming from the server.
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15 | *
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16 | * @author etienne_sf
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17 | */
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18 | public class HTTPInputStreamReader {
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19 | // //////////////////////////////////////////////////////////////////////////////
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20 | // //////////////////// Main attributes
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21 | // //////////////////////////////////////////////////////////////////////////////
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22 |
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23 | /**
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24 | * The current upload policy, always useful.
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25 | */
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26 | private UploadPolicy uploadPolicy = null;
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27 |
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28 | private HTTPConnectionHelper httpConnectionHelper = null;
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29 |
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30 | /**
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31 | * Contains the HTTP response bytearrayResponseBody, that is: the server
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32 | * response, without the headers.
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33 | */
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34 | String stringResponseBody = null;
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35 |
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36 | private byte[] bytearrayResponseBody = new byte[0];
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37 |
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38 | /**
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39 | * The headers of the HTTP response.
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40 | */
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41 | String responseHeaders = null;
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42 |
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43 | /**
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44 | * The status message from the first line of the response (e.g. "200 OK").
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45 | */
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46 | String responseMsg = null;
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47 |
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48 | // ////////////////////////////////////////////////////////////////////////////////////
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49 | // /////////////////// ATTRIBUTE CONTAINING DATA COMING FROM THE RESPONSE
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50 | // ////////////////////////////////////////////////////////////////////////////////////
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51 |
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52 | private CookieJar cookies = null;
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53 |
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54 | boolean gotClose = false;
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55 |
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56 | private boolean gotChunked = false;
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57 |
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58 | private boolean gotContentLength = false;
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59 |
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60 | private int clen = 0;
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61 |
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62 | /**
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63 | * The server HTTP response. Should be 200, in case of success.
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64 | */
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65 | private int httpStatusCode = 0;
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66 |
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67 | private String line = "";
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68 |
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69 | private String charset = "ISO-8859-1";
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70 |
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71 | // ////////////////////////////////////////////////////////////////////////////////////
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72 | // /////////////////// CONSTANTS USED TO CONTROL THE HTTP INTPUT
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73 | // ////////////////////////////////////////////////////////////////////////////////////
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74 | private final static int CHUNKBUF_SIZE = 4096;
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75 |
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76 | private final byte chunkbuf[] = new byte[CHUNKBUF_SIZE];
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77 |
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78 | private final static Pattern pChunked = Pattern.compile(
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79 | "^Transfer-Encoding:\\s+chunked", Pattern.CASE_INSENSITIVE);
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80 |
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81 | private final static Pattern pClose = Pattern.compile(
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82 | "^Connection:\\s+close", Pattern.CASE_INSENSITIVE);
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83 |
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84 | private final static Pattern pProxyClose = Pattern.compile(
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85 | "^Proxy-Connection:\\s+close", Pattern.CASE_INSENSITIVE);
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86 |
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87 | private final static Pattern pHttpStatus = Pattern
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88 | .compile("^HTTP/\\d\\.\\d\\s+((\\d+)\\s+.*)$");
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89 |
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90 | private final static Pattern pContentLen = Pattern.compile(
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91 | "^Content-Length:\\s+(\\d+)$", Pattern.CASE_INSENSITIVE);
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92 |
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93 | private final static Pattern pContentTypeCs = Pattern.compile(
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94 | "^Content-Type:\\s+.*;\\s*charset=([^;\\s]+).*$",
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95 | Pattern.CASE_INSENSITIVE);
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96 |
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97 | private final static Pattern pSetCookie = Pattern.compile(
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98 | "^Set-Cookie:\\s+(.*)$", Pattern.CASE_INSENSITIVE);
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99 |
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100 | /**
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101 | * The standard constructor: does nothing ! Oh yes, it initialize some
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102 | * attribute from the given parameter... :-)
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103 | *
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104 | * @param httpConnectionHelper The connection helper, associated with this
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105 | * instance.
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106 | * @param uploadPolicy The current upload policy.
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107 | */
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108 | public HTTPInputStreamReader(HTTPConnectionHelper httpConnectionHelper,
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109 | UploadPolicy uploadPolicy) {
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110 | this.httpConnectionHelper = httpConnectionHelper;
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111 | this.uploadPolicy = uploadPolicy;
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112 | this.cookies = new CookieJar(uploadPolicy);
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113 | }
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114 |
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115 | /**
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116 | * Return the last read http response (200, in case of success).
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117 | *
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118 | * @return The last read http response
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119 | */
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120 | public int gethttpStatusCode() {
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121 | return this.httpStatusCode;
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122 | }
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123 |
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124 | /**
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125 | * Get the last response bytearrayResponseBody.
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126 | *
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127 | * @return The last read response bytearrayResponseBody.
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128 | */
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129 | public String getResponseBody() {
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130 | return this.stringResponseBody;
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131 | }
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132 |
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133 | /**
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134 | * Get the last response bytearrayResponseBody. This byte array should be
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135 | * decoded by using the {@link #getResponseCharset()}.
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136 | *
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137 | * @return The last read response bytearrayResponseBody.
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138 | *
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139 | */
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140 | public byte[] getResponseBodyAsByteArray() {
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141 | return this.bytearrayResponseBody;
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142 | }
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143 |
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144 | /**
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145 | * Get the charset that should be used to decode the last response, when
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146 | * using the {@link #getResponseBodyAsByteArray()} method.
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147 | *
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148 | * @return The last read response bytearrayResponseBody.
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149 | */
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150 | public String getResponseCharset() {
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151 | return this.charset;
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152 | }
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153 |
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154 | /**
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155 | * Get the headers of the HTTP response.
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156 | *
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157 | * @return The HTTP headers.
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158 | */
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159 | public String getResponseHeaders() {
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160 | return this.responseHeaders;
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161 | }
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162 |
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163 | /**
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164 | * Get the last response message.
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165 | *
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166 | * @return The response message from the first line of the response (e.g.
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167 | * "200 OK").
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168 | */
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169 | public String getResponseMsg() {
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170 | return this.responseMsg;
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171 | }
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172 |
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173 | /**
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174 | * The main method: reads the response in the input stream.
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175 | *
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176 | * @return The response status (e.g.: 200 if everything was ok)
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177 | * @throws JUploadException
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178 | */
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179 | public int readHttpResponse() throws JUploadException {
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180 | PushbackInputStream httpDataIn = this.httpConnectionHelper
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181 | .getInputStream();
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182 |
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183 | try {
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184 | // We first read the headers,
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185 | readHeaders(httpDataIn);
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186 |
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187 | // then the bytearrayResponseBody.
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188 | // If we're in a HEAD request ... we're not interested in the
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189 | // bytearrayResponseBody!
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190 | if (this.httpConnectionHelper.getMethod().equals("HEAD")) {
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191 | this.uploadPolicy
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192 | .displayDebug(
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193 | "This is a HEAD request: we don't care about the bytearrayResponseBody",
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194 | 70);
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195 | this.stringResponseBody = "";
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196 | } else {
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197 | readBody(httpDataIn);
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198 | }
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199 | } catch (JUploadException e) {
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200 | throw e;
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201 | } catch (Exception e) {
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202 | throw new JUploadException(e);
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203 | }
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204 |
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205 | return this.httpStatusCode;
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206 | }
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207 |
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208 | // //////////////////////////////////////////////////////////////////////////////////////
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209 | // //////////////////// Various utilities
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210 | // //////////////////////////////////////////////////////////////////////////////////////
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211 |
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212 | /**
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213 | * Concatenates two byte arrays.
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214 | *
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215 | * @param buf1 The first array
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216 | * @param buf2 The second array
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217 | * @return A byte array, containing buf2 appended to buf2
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218 | */
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219 | static byte[] byteAppend(byte[] buf1, byte[] buf2) {
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220 | byte[] ret = new byte[buf1.length + buf2.length];
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221 | System.arraycopy(buf1, 0, ret, 0, buf1.length);
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222 | System.arraycopy(buf2, 0, ret, buf1.length, buf2.length);
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223 | return ret;
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224 | }
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225 |
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226 | /**
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227 | * Concatenates two byte arrays.
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228 | *
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229 | * @param buf1 The first array
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230 | * @param buf2 The second array
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231 | * @param len Number of bytes to copy from buf2
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232 | * @return A byte array, containing buf2 appended to buf2
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233 | */
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234 | static byte[] byteAppend(byte[] buf1, byte[] buf2, int len) {
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235 | if (len > buf2.length)
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236 | len = buf2.length;
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237 | byte[] ret = new byte[buf1.length + len];
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238 | System.arraycopy(buf1, 0, ret, 0, buf1.length);
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239 | System.arraycopy(buf2, 0, ret, buf1.length, len);
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240 | return ret;
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241 | }
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242 |
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243 | /**
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244 | * Similar like BufferedInputStream#readLine() but operates on raw bytes.
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245 | * Line-Ending is <b>always</b> "\r\n".
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246 | *
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247 | * @param inputStream
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248 | *
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249 | * @param charset The input charset of the stream.
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250 | * @param includeCR Set to true, if the terminating CR/LF should be included
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251 | * in the returned byte array.
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252 | * @return The line, encoded from the input stream with the given charset
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253 | * @throws IOException
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254 | * @throws JUploadException
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255 | */
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256 | public static String readLine(PushbackInputStream inputStream,
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257 | String charset, boolean includeCR) throws IOException,
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258 | JUploadException {
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259 | byte[] line = readLine(inputStream, includeCR);
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260 | return (null == line) ? null : new String(line, charset);
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261 | }
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262 |
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263 | /**
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264 | * Similar like BufferedInputStream#readLine() but operates on raw bytes.
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265 | * According to RFC 2616, and of line may be CR (13), LF (10) or CRLF.
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266 | * Line-Ending is <b>always</b> "\r\n" in header, but not in text bodies.
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267 | * Update done by TedA (sourceforge account: tedaaa). Allows to manage
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268 | * response from web server that send LF instead of CRLF ! Here is a part of
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269 | * the RFC: <I>"we recommend that applications, when parsing such headers,
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270 | * recognize a single LF as a line terminator and ignore the leading
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271 | * CR"</I>. <BR>
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272 | * Corrected again to manage line finished by CR only. This is not allowed
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273 | * in headers, but this method is also used to read lines in the
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274 | * bytearrayResponseBody.
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275 | *
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276 | * @param inputStream
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277 | *
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278 | * @param includeCR Set to true, if the terminating CR/LF should be included
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279 | * in the returned byte array. In this case, CR/LF is always
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280 | * returned to the caller, whether the input stream got CR, LF or
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281 | * CRLF.
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282 | * @return The byte array from the input stream, with or without a trailing
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283 | * CRLF
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284 | * @throws IOException
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285 | * @throws JUploadException
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286 | */
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287 | public static byte[] readLine(PushbackInputStream inputStream,
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288 | boolean includeCR) throws IOException, JUploadException {
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289 | final byte EOS = -1;
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290 | final byte CR = 13;
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291 | final byte LF = 10;
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292 | int len = 0;
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293 | int buflen = 128; // average line length
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294 | byte[] buf = new byte[buflen];
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295 | byte[] ret = null;
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296 | int b;
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297 | boolean lineRead = false;
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298 |
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299 | while (!lineRead) {
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300 | try {
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301 | b = inputStream.read();
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302 | } catch (IOException ioe) {
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303 | throw new JUploadIOException(ioe.getClass().getName() + ": "
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304 | + ioe.getMessage()
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305 | + " (while reading server response )", ioe);
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306 | } catch (Exception e) {
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307 | throw new JUploadException(e.getClass().getName() + ": "
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308 | + e.getMessage() + " (while reading server response )",
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309 | e);
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310 | }
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311 | switch (b) {
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312 | case EOS:
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313 | // We've finished reading the stream, and so the line is
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314 | // finished too.
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315 | if (len == 0) {
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316 | return null;
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317 | }
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318 | lineRead = true;
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319 | break;
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320 | /*
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321 | * if (len > 0) { ret = new byte[len]; System.arraycopy(buf, 0,
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322 | * ret, 0, len); return ret; } return null;
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323 | */
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324 | case LF:
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325 | // We found the end of the current line.
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326 | lineRead = true;
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327 | break;
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328 | case CR:
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329 | // We got a CR. It can be the end of line.
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330 | // Is it followed by a LF ? (not mandatory in RFC 2616)
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331 | b = inputStream.read();
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332 |
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333 | if (b != LF) {
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334 | // The end of line was a simple LF: the next one blongs
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335 | // to the next line.
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336 | inputStream.unread(b);
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337 | }
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338 | lineRead = true;
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339 | break;
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340 | default:
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341 | buf[len++] = (byte) b;
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342 | // If the buffer is too small, we let enough space to add CR
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343 | // and LF, in case of ...
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344 | if (len + 2 >= buflen) {
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345 | buflen *= 2;
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346 | byte[] tmp = new byte[buflen];
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347 | System.arraycopy(buf, 0, tmp, 0, len);
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348 | buf = tmp;
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349 | }
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350 | }
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351 | } // while
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352 |
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353 | // Let's go back to before any CR and LF.
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354 | while (len > 0 && (buf[len] == CR || buf[len] == LF)) {
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355 | len -= 1;
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356 | }
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357 |
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358 | // Ok, now len indicates the end of the actual line.
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359 | // Should we add a proper CRLF, or nothing ?
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360 | if (includeCR) {
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361 | // We have enough space to add these two characters (see the default
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362 | // here above)
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363 | buf[len++] = CR;
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364 | buf[len++] = LF;
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365 | }
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366 |
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367 | if (len > 0) {
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368 | ret = new byte[len];
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369 | if (len > 0)
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370 | System.arraycopy(buf, 0, ret, 0, len);
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371 | } else {
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372 | // line feed for empty line between headers and
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373 | // bytearrayResponseBody, or within the
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374 | // bytearrayResponseBody.
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375 | ret = new byte[0];
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376 | }
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377 | return ret;
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378 | }
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379 |
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380 | /**
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381 | * Read the headers from the given input stream.
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382 | *
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383 | * @param httpDataIn The http input stream
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384 | * @throws IOException
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385 | * @throws JUploadException
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386 | */
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387 | private void readHeaders(PushbackInputStream httpDataIn)
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388 | throws IOException, JUploadException {
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389 | StringBuffer sbHeaders = new StringBuffer();
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390 | // Headers are US-ASCII (See RFC 2616, Section 2.2)
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391 | String tmp;
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392 | // We must be reading the first line of the HTTP header.
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393 | this.uploadPolicy.displayDebug(
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394 | "-------- Response Headers Start --------", 80);
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395 |
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396 | do {
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397 | tmp = readLine(httpDataIn, "US-ASCII", false);
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398 | if (null == tmp) {
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399 | throw new JUploadEOFException(this.uploadPolicy,
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400 | "reading headers");
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401 | }
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402 | if (this.httpStatusCode == 0) {
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403 | Matcher m = pHttpStatus.matcher(tmp);
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404 | if (m.matches()) {
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405 | this.httpStatusCode = Integer.parseInt(m.group(2));
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406 | this.responseMsg = m.group(1);
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407 | } else {
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408 | // The status line must be the first line of the
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409 | // response. (See RFC 2616, Section 6.1) so this
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410 | // is an error.
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411 |
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412 | // We first display the wrong line.
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413 | this.uploadPolicy.displayDebug("First line of response: '"
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414 | + tmp + "'", 80);
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415 | // Then, we throw the exception.
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416 | throw new JUploadException(
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417 | "HTTP response did not begin with status line.");
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418 | }
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419 | }
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420 | // Handle folded headers (RFC 2616, Section 2.2). This is
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421 | // handled after the status line, because that line may
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422 | // not be folded (RFC 2616, Section 6.1).
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423 | if (tmp.startsWith(" ") || tmp.startsWith("\t"))
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424 | this.line += " " + tmp.trim();
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425 | else
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426 | this.line = tmp;
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427 |
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428 | // The read line is now correctly formatted.
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429 | this.uploadPolicy.displayDebug(this.line, 80);
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430 | sbHeaders.append(tmp).append("\n");
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431 |
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432 | if (pClose.matcher(this.line).matches())
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433 | this.gotClose = true;
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434 | if (pProxyClose.matcher(this.line).matches())
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435 | this.gotClose = true;
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436 | if (pChunked.matcher(this.line).matches())
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437 | this.gotChunked = true;
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438 | Matcher m = pContentLen.matcher(this.line);
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439 | if (m.matches()) {
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440 | this.gotContentLength = true;
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441 | this.clen = Integer.parseInt(m.group(1));
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442 | }
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443 | m = pContentTypeCs.matcher(this.line);
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444 | if (m.matches())
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445 | this.charset = m.group(1);
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446 | m = pSetCookie.matcher(this.line);
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447 | if (m.matches()) {
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448 | this.uploadPolicy.displayDebug(
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449 | "Calling this.cookies.parseCookieHeader, with parameter: "
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450 | + m.group(1), 80);
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451 | this.cookies.parseCookieHeader(m.group(1));
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452 | this.uploadPolicy.displayDebug("Cookie header parsed.", 80);
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453 | }
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454 | // RFC 2616, Section 6. Body is separated by the header with an
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455 | // empty line: so end of headers is an empty line.
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456 | } while (this.line.length() > 0);
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457 |
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458 | this.responseHeaders = sbHeaders.toString();
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459 | this.uploadPolicy.displayDebug(
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460 | "--------- Response Headers End ---------", 80);
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461 | }// readHeaders()
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462 |
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463 | /**
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464 | * Read the bytearrayResponseBody from the given input stream.
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465 | *
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466 | * @param httpDataIn The http input stream
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467 | * @throws IOException
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468 | * @throws JUploadException
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469 | * @throws JUploadException
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470 | */
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471 | private void readBody(PushbackInputStream httpDataIn) throws IOException,
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472 | JUploadException {
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473 | // && is evaluated from left to right so !stop must come first!
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474 | while ((!this.gotContentLength) || (this.clen > 0)) {
|
---|
475 | if (this.gotChunked) {
|
---|
476 | // Read the chunk header.
|
---|
477 | // This is US-ASCII! (See RFC 2616, Section 2.2)
|
---|
478 | this.line = readLine(httpDataIn, "US-ASCII", false);
|
---|
479 | if (null == this.line)
|
---|
480 | throw new JUploadEOFException(this.uploadPolicy,
|
---|
481 | "reading HTTP Body, HTTP chunked mode (1)");
|
---|
482 | // Handle a single chunk of the response
|
---|
483 | // We cut off possible chunk extensions and ignore them.
|
---|
484 | // The length is hex-encoded (RFC 2616, Section 3.6.1)
|
---|
485 | int len = Integer.parseInt(this.line.replaceFirst(";.*", "")
|
---|
486 | .trim(), 16);
|
---|
487 | this.uploadPolicy.displayDebug("Chunk: " + this.line + " dec: "
|
---|
488 | + len, 70);
|
---|
489 | if (len == 0) {
|
---|
490 | // RFC 2616, Section 3.6.1: A length of 0 denotes
|
---|
491 | // the last chunk of the bytearrayResponseBody.
|
---|
492 |
|
---|
493 | // This code wrong if the server sends chunks with trailers!
|
---|
494 | // (trailers are HTTP Headers that are send *after* the
|
---|
495 | // bytearrayResponseBody. These are announced
|
---|
496 | // in the regular HTTP header "Trailer".
|
---|
497 | // Fritz: Never seen them so far ...
|
---|
498 | // TODO: Implement trailer-handling.
|
---|
499 | break;
|
---|
500 | }
|
---|
501 |
|
---|
502 | // Loop over the chunk (len == length of the chunk)
|
---|
503 | while (len > 0) {
|
---|
504 | int rlen = (len > CHUNKBUF_SIZE) ? CHUNKBUF_SIZE : len;
|
---|
505 | int ofs = 0;
|
---|
506 | if (rlen > 0) {
|
---|
507 | while (ofs < rlen) {
|
---|
508 | int res = httpDataIn.read(this.chunkbuf, ofs, rlen
|
---|
509 | - ofs);
|
---|
510 | if (res < 0)
|
---|
511 | throw new JUploadEOFException(
|
---|
512 | this.uploadPolicy,
|
---|
513 | "reading body, HTTP chunk mode (2)");
|
---|
514 | len -= res;
|
---|
515 | ofs += res;
|
---|
516 | }
|
---|
517 | if (ofs < rlen)
|
---|
518 | throw new JUploadException("short read");
|
---|
519 | if (rlen < CHUNKBUF_SIZE)
|
---|
520 | this.bytearrayResponseBody = byteAppend(
|
---|
521 | this.bytearrayResponseBody, this.chunkbuf,
|
---|
522 | rlen);
|
---|
523 | else
|
---|
524 | this.bytearrayResponseBody = byteAppend(
|
---|
525 | this.bytearrayResponseBody, this.chunkbuf);
|
---|
526 | }
|
---|
527 | }
|
---|
528 | // Got the whole chunk, read the trailing CRLF.
|
---|
529 | readLine(httpDataIn, false);
|
---|
530 | } else {
|
---|
531 | // Not chunked. Use either content-length (if available)
|
---|
532 | // or read until EOF.
|
---|
533 | if (this.gotContentLength) {
|
---|
534 | // Got a Content-Length. Read exactly that amount of
|
---|
535 | // bytes.
|
---|
536 | while (this.clen > 0) {
|
---|
537 | int rlen = (this.clen > CHUNKBUF_SIZE) ? CHUNKBUF_SIZE
|
---|
538 | : this.clen;
|
---|
539 | int ofs = 0;
|
---|
540 | if (rlen > 0) {
|
---|
541 | while (ofs < rlen) {
|
---|
542 | int res = httpDataIn.read(this.chunkbuf, ofs,
|
---|
543 | rlen - ofs);
|
---|
544 | if (res < 0)
|
---|
545 | throw new JUploadEOFException(
|
---|
546 | this.uploadPolicy,
|
---|
547 | "reading HTTP bytearrayResponseBody, not chunked mode");
|
---|
548 | this.clen -= res;
|
---|
549 | ofs += res;
|
---|
550 | }
|
---|
551 | if (ofs < rlen)
|
---|
552 | throw new JUploadException("short read");
|
---|
553 | if (rlen < CHUNKBUF_SIZE)
|
---|
554 | this.bytearrayResponseBody = byteAppend(
|
---|
555 | this.bytearrayResponseBody,
|
---|
556 | this.chunkbuf, rlen);
|
---|
557 | else
|
---|
558 | this.bytearrayResponseBody = byteAppend(
|
---|
559 | this.bytearrayResponseBody,
|
---|
560 | this.chunkbuf);
|
---|
561 | }
|
---|
562 | }
|
---|
563 | } else {
|
---|
564 | // No Content-length available, read until EOF
|
---|
565 | //
|
---|
566 | while (true) {
|
---|
567 | byte[] lbuf = readLine(httpDataIn, true);
|
---|
568 | if (null == lbuf)
|
---|
569 | break;
|
---|
570 | this.bytearrayResponseBody = byteAppend(
|
---|
571 | this.bytearrayResponseBody, lbuf);
|
---|
572 | }
|
---|
573 | break;
|
---|
574 | }
|
---|
575 | }
|
---|
576 | } // while
|
---|
577 |
|
---|
578 | // Convert the whole bytearrayResponseBody according to the charset.
|
---|
579 | // The default for charset ISO-8859-1, but overridden by
|
---|
580 | // the charset attribute of the Content-Type header (if any).
|
---|
581 | // See RFC 2616, Sections 3.4.1 and 3.7.1.
|
---|
582 | this.stringResponseBody = new String(this.bytearrayResponseBody,
|
---|
583 | this.charset);
|
---|
584 |
|
---|
585 | // At the higher debug level, we display the response.
|
---|
586 | this.uploadPolicy.displayDebug("-------- Response Body Start --------",
|
---|
587 | 99);
|
---|
588 | this.uploadPolicy.displayDebug(this.stringResponseBody, 99);
|
---|
589 | this.uploadPolicy.displayDebug("-------- Response Body End --------",
|
---|
590 | 99);
|
---|
591 | }// readBody
|
---|
592 | }
|
---|