1 /* 2 * Copyright (C) 2006 Alexey Proskuryakov (ap (at) webkit.org) 3 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 4 * Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/ 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 16 * its contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "HTTPParsers.h" 33 34 #include "CString.h" 35 #include "PlatformString.h" 36 #include <wtf/DateMath.h> 37 38 using namespace WTF; 39 40 namespace WebCore { 41 42 // true if there is more to parse 43 static inline bool skipWhiteSpace(const String& str, int& pos, bool fromHttpEquivMeta) 44 { 45 int len = str.length(); 46 47 if (fromHttpEquivMeta) { 48 while (pos != len && str[pos] <= ' ') 49 ++pos; 50 } else { 51 while (pos != len && (str[pos] == '\t' || str[pos] == ' ')) 52 ++pos; 53 } 54 55 return pos != len; 56 } 57 58 bool parseHTTPRefresh(const String& refresh, bool fromHttpEquivMeta, double& delay, String& url) 59 { 60 int len = refresh.length(); 61 int pos = 0; 62 63 if (!skipWhiteSpace(refresh, pos, fromHttpEquivMeta)) 64 return false; 65 66 while (pos != len && refresh[pos] != ',' && refresh[pos] != ';') 67 ++pos; 68 69 if (pos == len) { // no URL 70 url = String(); 71 bool ok; 72 delay = refresh.stripWhiteSpace().toDouble(&ok); 73 return ok; 74 } else { 75 bool ok; 76 delay = refresh.left(pos).stripWhiteSpace().toDouble(&ok); 77 if (!ok) 78 return false; 79 80 ++pos; 81 skipWhiteSpace(refresh, pos, fromHttpEquivMeta); 82 int urlStartPos = pos; 83 if (refresh.find("url", urlStartPos, false) == urlStartPos) { 84 urlStartPos += 3; 85 skipWhiteSpace(refresh, urlStartPos, fromHttpEquivMeta); 86 if (refresh[urlStartPos] == '=') { 87 ++urlStartPos; 88 skipWhiteSpace(refresh, urlStartPos, fromHttpEquivMeta); 89 } else 90 urlStartPos = pos; // e.g. "Refresh: 0; url.html" 91 } 92 93 int urlEndPos = len; 94 95 if (refresh[urlStartPos] == '"' || refresh[urlStartPos] == '\'') { 96 UChar quotationMark = refresh[urlStartPos]; 97 urlStartPos++; 98 while (urlEndPos > urlStartPos) { 99 urlEndPos--; 100 if (refresh[urlEndPos] == quotationMark) 101 break; 102 } 103 104 // https://bugs.webkit.org/show_bug.cgi?id=27868 105 // Sometimes there is no closing quote for the end of the URL even though there was an opening quote. 106 // If we looped over the entire alleged URL string back to the opening quote, just go ahead and use everything 107 // after the opening quote instead. 108 if (urlEndPos == urlStartPos) 109 urlEndPos = len; 110 } 111 112 url = refresh.substring(urlStartPos, urlEndPos - urlStartPos).stripWhiteSpace(); 113 return true; 114 } 115 } 116 117 double parseDate(const String& value) 118 { 119 return parseDateFromNullTerminatedCharacters(value.utf8().data()); 120 } 121 122 String filenameFromHTTPContentDisposition(const String& value) 123 { 124 Vector<String> keyValuePairs; 125 value.split(';', keyValuePairs); 126 127 unsigned length = keyValuePairs.size(); 128 for (unsigned i = 0; i < length; i++) { 129 int valueStartPos = keyValuePairs[i].find('='); 130 if (valueStartPos < 0) 131 continue; 132 133 String key = keyValuePairs[i].left(valueStartPos).stripWhiteSpace(); 134 135 if (key.isEmpty() || key != "filename") 136 continue; 137 138 String value = keyValuePairs[i].substring(valueStartPos + 1).stripWhiteSpace(); 139 140 // Remove quotes if there are any 141 if (value[0] == '\"') 142 value = value.substring(1, value.length() - 2); 143 144 return value; 145 } 146 147 return String(); 148 } 149 150 String extractMIMETypeFromMediaType(const String& mediaType) 151 { 152 Vector<UChar, 64> mimeType; 153 unsigned length = mediaType.length(); 154 mimeType.reserveCapacity(length); 155 for (unsigned i = 0; i < length; i++) { 156 UChar c = mediaType[i]; 157 158 if (c == ';') 159 break; 160 161 // While RFC 2616 does not allow it, other browsers allow multiple values in the HTTP media 162 // type header field, Content-Type. In such cases, the media type string passed here may contain 163 // the multiple values separated by commas. For now, this code ignores text after the first comma, 164 // which prevents it from simply failing to parse such types altogether. Later for better 165 // compatibility we could consider using the first or last valid MIME type instead. 166 // See https://bugs.webkit.org/show_bug.cgi?id=25352 for more discussion. 167 if (c == ',') 168 break; 169 170 // FIXME: The following is not correct. RFC 2616 allows linear white space before and 171 // after the MIME type, but not within the MIME type itself. And linear white space 172 // includes only a few specific ASCII characters; a small subset of isSpaceOrNewline. 173 // See https://bugs.webkit.org/show_bug.cgi?id=8644 for a bug tracking part of this. 174 if (isSpaceOrNewline(c)) 175 continue; 176 177 mimeType.append(c); 178 } 179 180 if (mimeType.size() == length) 181 return mediaType; 182 return String(mimeType.data(), mimeType.size()); 183 } 184 185 String extractCharsetFromMediaType(const String& mediaType) 186 { 187 int pos = 0; 188 int length = (int)mediaType.length(); 189 190 while (pos < length) { 191 pos = mediaType.find("charset", pos, false); 192 if (pos <= 0) 193 return String(); 194 195 // is what we found a beginning of a word? 196 if (mediaType[pos-1] > ' ' && mediaType[pos-1] != ';') { 197 pos += 7; 198 continue; 199 } 200 201 pos += 7; 202 203 // skip whitespace 204 while (pos != length && mediaType[pos] <= ' ') 205 ++pos; 206 207 if (mediaType[pos++] != '=') // this "charset" substring wasn't a parameter name, but there may be others 208 continue; 209 210 while (pos != length && (mediaType[pos] <= ' ' || mediaType[pos] == '"' || mediaType[pos] == '\'')) 211 ++pos; 212 213 // we don't handle spaces within quoted parameter values, because charset names cannot have any 214 int endpos = pos; 215 while (pos != length && mediaType[endpos] > ' ' && mediaType[endpos] != '"' && mediaType[endpos] != '\'' && mediaType[endpos] != ';') 216 ++endpos; 217 218 return mediaType.substring(pos, endpos-pos); 219 } 220 221 return String(); 222 } 223 } 224
