src/HttpHdrExtField.cc

   1
   2 /*
   3  * $Id$
   4  *
   5  * DEBUG: section 69    HTTP Header: Extension Field
   6  * AUTHOR: Alex Rousskov
   7  *
   8  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   9  * ----------------------------------------------------------
  10  *
  11  *  Squid is the result of efforts by numerous individuals from
  12  *  the Internet community; see the CONTRIBUTORS file for full
  13  *  details.   Many organizations have provided support for Squid's
  14  *  development; see the SPONSORS file for full details.  Squid is
  15  *  Copyrighted (C) 2001 by the Regents of the University of
  16  *  California; see the COPYRIGHT file for full details.  Squid
  17  *  incorporates software developed and/or copyrighted by other
  18  *  sources; see the CREDITS file for full details.
  19  *
  20  *  This program is free software; you can redistribute it and/or modify
  21  *  it under the terms of the GNU General Public License as published by
  22  *  the Free Software Foundation; either version 2 of the License, or
  23  *  (at your option) any later version.
  24  *
  25  *  This program is distributed in the hope that it will be useful,
  26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  *  GNU General Public License for more details.
  29  *
  30  *  You should have received a copy of the GNU General Public License
  31  *  along with this program; if not, write to the Free Software
  32  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  33  *
  34  */
  35
  36 #include "squid.h"
  37
  38 /* local prototypes */
  39 static HttpHdrExtField *httpHdrExtFieldDoCreate(const char *name, int name_len, const char *value, int val_len);
  40
  41
  42 /* implementation */
  43
  44 static HttpHdrExtField *
  45 httpHdrExtFieldDoCreate(const char *name, int name_len,
  46                         const char *value, int value_len)
  47 {
  48     HttpHdrExtField *f = new HttpHdrExtField;
  49     stringLimitInit(&f->name, name, name_len);
  50     stringLimitInit(&f->value, value, value_len);
  51     return f;
  52 }
  53
  54 HttpHdrExtField *
  55 httpHdrExtFieldCreate(const char *name, const char *value)
  56 {
  57     return httpHdrExtFieldDoCreate(
  58                name, strlen(name),
  59                value, strlen(value));
  60 }
  61
  62 /* parses ext field; returns fresh ext field on success and NULL on failure */
  63 HttpHdrExtField *
  64 httpHdrExtFieldParseCreate(const char *field_start, const char *field_end)
  65 {
  66     /* note: name_start == field_start */
  67     const char *name_end = strchr(field_start, ':');
  68     const char *value_start;
  69     /* note: value_end == field_end */
  70
  71     if (!name_end || name_end <= field_start || name_end > field_end)
  72         return NULL;
  73
  74     value_start = name_end + 1; /* skip ':' */
  75
  76     /* skip white space */
  77     while (value_start < field_end && xisspace(*value_start))
  78         value_start++;
  79
  80     return httpHdrExtFieldDoCreate(
  81                field_start, name_end - field_start,
  82                value_start, field_end - value_start);
  83 }
  84
  85 void
  86 httpHdrExtFieldDestroy(HttpHdrExtField * f)
  87 {
  88     assert(f);
  89     f->name.clean();
  90     f->value.clean();
  91     delete f;
  92 }
  93
  94 HttpHdrExtField *
  95 httpHdrExtFieldDup(HttpHdrExtField * f)
  96 {
  97     assert(f);
  98     return httpHdrExtFieldDoCreate(
  99                f->name.buf(), f->name.size(),
 100                f->value.buf(), f->value.size());
 101 }