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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a class="el" href="dir_000000.html">src</a> / <a class="el" href="dir_000009.html">libpage</a></div>
<h1>header.c</h1><a href="header_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*</span>
00002 <span class="comment"> * Copyright (c) 2005, 2006 by KoanLogic s.r.l. <http://www.koanlogic.com></span>
00003 <span class="comment"> * All rights reserved.</span>
00004 <span class="comment"> *</span>
00005 <span class="comment"> * This file is part of KLone, and as such it is subject to the license stated</span>
00006 <span class="comment"> * in the LICENSE file which you have received as part of this distribution.</span>
00007 <span class="comment"> *</span>
00008 <span class="comment"> * $Id: header.c,v 1.14 2006/04/06 14:02:22 tat Exp $</span>
00009 <span class="comment"> */</span>
00010
00011 <span class="preprocessor">#include "klone_conf.h"</span>
00012 <span class="preprocessor">#include <u/libu.h></span>
00013 <span class="preprocessor">#include <<a class="code" href="klone_8h.html">klone/klone.h</a>></span>
00014 <span class="preprocessor">#include <<a class="code" href="header_8h.html">klone/header.h</a>></span>
00015 <span class="preprocessor">#include <<a class="code" href="utils_8h.html">klone/utils.h</a>></span>
00016
<a name="l00034"></a><a class="code" href="group__header__t.html#ga0">00034</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga0">header_set_field</a>(<a class="code" href="structheader__t.html">header_t</a> *h, <span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keyword">const</span> <span class="keywordtype">char</span> *value)
00035 {
00036 <a class="code" href="structfield__s.html">field_t</a>* n = NULL, *ex;
00037
00038 dbg_err_if (h == NULL);
00039 dbg_err_if (name == NULL);
00040 dbg_err_if (value == NULL);
00041
00042 <span class="comment">/* modify existing field if already set */</span>
00043 <span class="keywordflow">if</span>((ex = <a class="code" href="group__header__t.html#ga4">header_get_field</a>(h, name)) == NULL)
00044 {
00045 dbg_err_if(<a class="code" href="group__field__t.html#ga4">field_create</a>(name, value, &n));
00046 dbg_err_if(<a class="code" href="group__header__t.html#ga7">header_add_field</a>(h, n));
00047 } <span class="keywordflow">else</span>
00048 dbg_err_if(<a class="code" href="group__field__t.html#ga0">field_set</a>(ex, name, value));
00049
00050 <span class="keywordflow">return</span> 0;
00051 err:
00052 <span class="keywordflow">if</span>(n)
00053 <a class="code" href="group__field__t.html#ga5">field_free</a>(n);
00054 <span class="keywordflow">return</span> ~0;
00055 }
00056
<a name="l00066"></a><a class="code" href="group__header__t.html#ga1">00066</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga1">header_clear</a>(<a class="code" href="structheader__t.html">header_t</a> *h)
00067 {
00068 <a class="code" href="structfield__s.html">field_t</a> *f;
00069
00070 dbg_return_if (h == NULL, ~0);
00071
00072 <span class="comment">/* free all items */</span>
00073 <span class="keywordflow">while</span>((f = TAILQ_FIRST(&h-><a class="code" href="structheader__t.html#o0">fields</a>)) != NULL)
00074 {
00075 <a class="code" href="group__header__t.html#ga6">header_del_field</a>(h, f);
00076 <a class="code" href="group__field__t.html#ga5">field_free</a>(f);
00077 }
00078
00079 <span class="keywordflow">return</span> 0;
00080 }
00081
<a name="l00091"></a><a class="code" href="group__header__t.html#ga2">00091</a> size_t <a class="code" href="group__header__t.html#ga2">header_field_count</a>(<a class="code" href="structheader__t.html">header_t</a> *h)
00092 {
00093 dbg_return_if (h == NULL, 0);
00094
00095 <span class="keywordflow">return</span> h-><a class="code" href="structheader__t.html#o1">nfields</a>;
00096 }
00097
<a name="l00108"></a><a class="code" href="group__header__t.html#ga3">00108</a> <a class="code" href="structfield__s.html">field_t</a> *<a class="code" href="group__header__t.html#ga3">header_get_fieldn</a>(<a class="code" href="structheader__t.html">header_t</a> *h, size_t idx)
00109 {
00110 <a class="code" href="structfield__s.html">field_t</a> *f;
00111 size_t i = 0;
00112
00113 dbg_goto_if (h == NULL, notfound);
00114 nop_goto_if (idx >= h-><a class="code" href="structheader__t.html#o1">nfields</a>, notfound);
00115
00116 TAILQ_FOREACH(f, &h-><a class="code" href="structheader__t.html#o0">fields</a>, np)
00117 {
00118 <span class="keywordflow">if</span>(i == idx)
00119 <span class="keywordflow">return</span> f;
00120 ++i;
00121 }
00122
00123 notfound:
00124 <span class="keywordflow">return</span> NULL;
00125 }
00126
<a name="l00139"></a><a class="code" href="group__header__t.html#ga4">00139</a> <a class="code" href="structfield__s.html">field_t</a> *<a class="code" href="group__header__t.html#ga4">header_get_field</a>(<a class="code" href="structheader__t.html">header_t</a> *h, <span class="keyword">const</span> <span class="keywordtype">char</span> *name)
00140 {
00141 <a class="code" href="structfield__s.html">field_t</a> *f = NULL;
00142
00143 dbg_goto_if (h == NULL, notfound);
00144 dbg_goto_if (name == NULL, notfound);
00145
00146 TAILQ_FOREACH(f, &h-><a class="code" href="structheader__t.html#o0">fields</a>, np)
00147 <span class="keywordflow">if</span>(strcasecmp(f-><a class="code" href="structfield__s.html#o0">name</a>, name) == 0)
00148 <span class="keywordflow">return</span> f;
00149
00150 notfound:
00151 <span class="keywordflow">return</span> NULL;
00152 }
00153
<a name="l00166"></a><a class="code" href="group__header__t.html#ga5">00166</a> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__header__t.html#ga5">header_get_field_value</a>(<a class="code" href="structheader__t.html">header_t</a> *h, <span class="keyword">const</span> <span class="keywordtype">char</span> *name)
00167 {
00168 <a class="code" href="structfield__s.html">field_t</a> *f;
00169
00170 dbg_return_if (h == NULL, NULL);
00171 dbg_return_if (name == NULL, NULL);
00172
00173 f = <a class="code" href="group__header__t.html#ga4">header_get_field</a>(h, name);
00174
00175 <span class="keywordflow">return</span> f ? <a class="code" href="group__field__t.html#ga3">field_get_value</a>(f) : NULL;
00176 }
00177
<a name="l00188"></a><a class="code" href="group__header__t.html#ga6">00188</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga6">header_del_field</a>(<a class="code" href="structheader__t.html">header_t</a> *h, <a class="code" href="structfield__s.html">field_t</a> *f)
00189 {
00190 dbg_return_if (h == NULL, ~0);
00191 dbg_return_if (f == NULL, ~0);
00192
00193 TAILQ_REMOVE(&h-><a class="code" href="structheader__t.html#o0">fields</a>, f, np);
00194 h-><a class="code" href="structheader__t.html#o1">nfields</a>--;
00195
00196 <span class="keywordflow">return</span> 0;
00197 }
00198
<a name="l00209"></a><a class="code" href="group__header__t.html#ga7">00209</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga7">header_add_field</a>(<a class="code" href="structheader__t.html">header_t</a> *h, <a class="code" href="structfield__s.html">field_t</a> *f)
00210 {
00211 dbg_return_if (h == NULL, ~0);
00212 dbg_return_if (f == NULL, ~0);
00213
00214 TAILQ_INSERT_TAIL(&h-><a class="code" href="structheader__t.html#o0">fields</a>, f, np);
00215 h-><a class="code" href="structheader__t.html#o1">nfields</a>++;
00216
00217 <span class="keywordflow">return</span> 0;
00218 }
00219
00220 <span class="keyword">static</span> <span class="keywordtype">int</span> header_process_line(<a class="code" href="structheader__t.html">header_t</a> *h, u_string_t *line)
00221 {
00222 <a class="code" href="structfield__s.html">field_t</a> *f = NULL;
00223 <span class="keyword">const</span> <span class="keywordtype">char</span> *p;
00224
00225 dbg_err_if (h == NULL);
00226 dbg_err_if (line == NULL);
00227
00228 <span class="keywordflow">if</span>(!u_string_len(line))
00229 <span class="keywordflow">return</span> 0;
00230
00231 <span class="comment">/* look for name/value delimiter */</span>
00232 dbg_err_if((p = strchr(u_string_c(line), <span class="charliteral">':'</span>)) == NULL);
00233
00234 <span class="comment">/* alloc a new field */</span>
00235 dbg_err_if(<a class="code" href="group__field__t.html#ga4">field_create</a>(NULL, NULL, &f));
00236
00237 <span class="comment">/* parse and set name, value and params */</span>
00238 dbg_err_if(<a class="code" href="group__field__t.html#ga1">field_set_from_line</a>(f, u_string_c(line)));
00239
00240 <span class="comment">/* add to this header */</span>
00241 dbg_err_if(<a class="code" href="group__header__t.html#ga7">header_add_field</a>(h, f));
00242
00243 <span class="keywordflow">return</span> 0;
00244 err:
00245 <span class="keywordflow">if</span>(f)
00246 <a class="code" href="group__field__t.html#ga5">field_free</a>(f);
00247 <span class="keywordflow">return</span> ~0;
00248 }
00249
00250 <span class="comment">/* load from environment. change each HTTP_name=value to name=value (replacing</span>
00251 <span class="comment"> '_' with '-' */</span>
<a name="l00252"></a><a class="code" href="group__header__t.html#ga9">00252</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga9">header_load_from_cgienv</a>(<a class="code" href="structheader__t.html">header_t</a> *h)
00253 {
00254 <span class="keyword">extern</span> <span class="keywordtype">char</span> **environ;
00255 <span class="keyword">enum</span> { BUFSZ = 256 };
00256 <span class="keywordtype">int</span> i;
00257 size_t blen, t;
00258 <span class="keywordtype">char</span> *e, *eq, buf[BUFSZ];
00259
00260 <span class="comment">/* add HTTP_* to header field list */</span>
00261 <span class="keywordflow">for</span>(i = 0; environ[i]; ++i)
00262 {
00263 e = environ[i];
00264 <span class="keywordflow">if</span>(strlen(e) > 5 && strncmp(<span class="stringliteral">"HTTP_"</span>, e, 5) == 0)
00265 {
00266 memset(buf, 0, <span class="keyword">sizeof</span>(buf));
00267
00268 <span class="comment">/* make a copy of e so we can modify it */</span>
00269 strncpy(buf, e + 5, <a class="code" href="utils_8h.html#a0">MIN</a>(BUFSZ, strlen(e + 5)));
00270 buf[BUFSZ-1] = 0;
00271
00272 eq = strchr(buf, <span class="charliteral">'='</span>);
00273 <span class="keywordflow">if</span>(eq == NULL)
00274 <span class="keywordflow">continue</span>; <span class="comment">/* malformed */</span>
00275
00276 *eq = 0; <span class="comment">/* put a \0 between name and value */</span>
00277
00278 <span class="comment">/* subst '_' with '-' */</span>
00279 <span class="keywordflow">for</span>(t = 0, blen = strlen(buf); t < blen; ++t)
00280 <span class="keywordflow">if</span>(buf[t] == <span class="charliteral">'_'</span>)
00281 buf[t] = <span class="charliteral">'-'</span>;
00282
00283 dbg_if(<a class="code" href="group__header__t.html#ga0">header_set_field</a>(h, buf, 1 + eq));
00284 }
00285 }
00286
00287 <span class="keywordflow">return</span> 0;
00288 err:
00289 <span class="keywordflow">return</span> ~0;
00290 }
00291
<a name="l00292"></a><a class="code" href="group__header__t.html#ga10">00292</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga10">header_load</a>(<a class="code" href="structheader__t.html">header_t</a> *h , <a class="code" href="structio__s.html">io_t</a> *io)
00293 {
00294 <span class="keyword">enum</span> { HEADER_MAX_FIELD_COUNT = 256 }; <span class="comment">/* max num of header fields */</span>
00295 u_string_t *line = NULL, *unfolded = NULL;
00296 <span class="keyword">const</span> <span class="keywordtype">char</span> *ln;
00297 size_t len, c;
00298
00299 dbg_err_if (h == NULL);
00300 dbg_err_if (io == NULL);
00301
00302 dbg_err_if(u_string_create(NULL, 0, &line));
00303 dbg_err_if(u_string_create(NULL, 0, &unfolded));
00304
00305 <span class="keywordflow">for</span>(c = HEADER_MAX_FIELD_COUNT; <a class="code" href="group__u__t.html#ga33">u_getline</a>(io, line) == 0; --c)
00306 {
00307 warn_err_ifm(c == 0, <span class="stringliteral">"too much header fields"</span>);
00308
00309 ln = u_string_c(line);
00310 len = u_string_len(line);
00311
00312 <span class="comment">/* remove trailing nl(s) */</span>
00313 <span class="keywordflow">while</span>(len && u_isnl(ln[len-1]))
00314 u_string_set_length(line, --len);
00315
00316 <span class="keywordflow">if</span>(u_string_len(line) == 0)
00317 <span class="keywordflow">break</span>; <span class="comment">/* empty line */</span>
00318
00319 <span class="keywordflow">if</span>(u_isblank(ln[0]))
00320 { <span class="comment">/* this is a chunk of a folded line */</span>
00321 dbg_err_if(u_string_append(unfolded, ln, u_string_len(line)));
00322 } <span class="keywordflow">else</span> {
00323 <span class="keywordflow">if</span>(u_string_len(unfolded))
00324 {
00325 <span class="comment">/* go process this (already unfolded) line */</span>
00326 header_process_line(h, unfolded);
00327 u_string_clear(unfolded);
00328 }
00329 <span class="comment">/* this may be the first line of a folded line so wait next lines */</span>
00330 u_string_copy(unfolded, line);
00331 }
00332 }
00333
00334 <span class="keywordflow">if</span>(u_string_len(unfolded))
00335 header_process_line(h, unfolded);
00336
00337 u_string_free(unfolded);
00338 u_string_free(line);
00339
00340 <span class="keywordflow">return</span> 0;
00341 err:
00342 <span class="keywordflow">if</span>(line)
00343 u_string_free(line);
00344 <span class="keywordflow">if</span>(unfolded)
00345 u_string_free(unfolded);
00346 <span class="keywordflow">return</span> ~0;
00347 }
00348
<a name="l00349"></a><a class="code" href="group__header__t.html#ga11">00349</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga11">header_create</a>(<a class="code" href="structheader__t.html">header_t</a> **ph)
00350 {
00351 <a class="code" href="structheader__t.html">header_t</a> *h = NULL;
00352
00353 dbg_err_if (ph == NULL);
00354
00355 h = u_zalloc(<span class="keyword">sizeof</span>(<a class="code" href="structheader__t.html">header_t</a>));
00356 dbg_err_if(h == NULL);
00357
00358 TAILQ_INIT(&h-><a class="code" href="structheader__t.html#o0">fields</a>);
00359
00360 *ph = h;
00361
00362 <span class="keywordflow">return</span> 0;
00363 err:
00364 <span class="keywordflow">return</span> ~0;
00365 }
00366
<a name="l00367"></a><a class="code" href="group__header__t.html#ga12">00367</a> <span class="keywordtype">int</span> <a class="code" href="group__header__t.html#ga12">header_free</a>(<a class="code" href="structheader__t.html">header_t</a> *h)
00368 {
00369 <span class="keywordflow">if</span> (h)
00370 {
00371 (void) <a class="code" href="group__header__t.html#ga1">header_clear</a>(h);
00372 U_FREE(h);
00373 }
00374
00375 <span class="keywordflow">return</span> 0;
00376 }
00377
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