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example_router_srv_8c-example.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Sagui library: example_router_srv.c</title>
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<div id="projectname">Sagui library<span id="projectnumber"> v3.5.0</span>
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<div id="projectbrief">Cross-platform library which helps to develop web servers or frameworks.</div>
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<div class="headertitle"><div class="title">example_router_srv.c</div></div>
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<div class="contents">
<p>Simple example showing how to use the router feature in a HTTP server.</p>
<div class="fragment"><div class="line"><span class="comment">/* _</span></div>
<div class="line"><span class="comment"> * ___ __ _ __ _ _ _(_)</span></div>
<div class="line"><span class="comment"> * / __|/ _` |/ _` | | | | |</span></div>
<div class="line"><span class="comment"> * \__ \ (_| | (_| | |_| | |</span></div>
<div class="line"><span class="comment"> * |___/\__,_|\__, |\__,_|_|</span></div>
<div class="line"><span class="comment"> * |___/</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Cross-platform library which helps to develop web servers or frameworks.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Copyright (C) 2016-2019 Silvio Clecio <[email protected]></span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Sagui library is free software; you can redistribute it and/or</span></div>
<div class="line"><span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Sagui library is distributed in the hope that it will be useful,</span></div>
<div class="line"><span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><span class="comment"> * License along with Sagui library; if not, write to the Free Software</span></div>
<div class="line"><span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> </div>
<div class="line"><span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Tests:</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * # return "Home"</span></div>
<div class="line"><span class="comment"> * curl http://localhost:<PORT>/home</span></div>
<div class="line"><span class="comment"> * # return "Download"</span></div>
<div class="line"><span class="comment"> * curl http://localhost:<PORT>/download</span></div>
<div class="line"><span class="comment"> * # return "file: <FILENAME>"</span></div>
<div class="line"><span class="comment"> * curl http://localhost:<PORT>/download/<FILENAME></span></div>
<div class="line"><span class="comment"> * # return "About"</span></div>
<div class="line"><span class="comment"> * curl http://localhost:<PORT>/about</span></div>
<div class="line"><span class="comment"> * # return "404"</span></div>
<div class="line"><span class="comment"> * curl http://localhost:<PORT>/other</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="sagui_8h.html">sagui.h</a>></span></div>
<div class="line"> </div>
<div class="line"><span class="comment">/* NOTE: Error checking has been omitted to make it clear. */</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">struct </span>holder {</div>
<div class="line"> <span class="keyword">struct </span><a id="_a0" name="_a0"></a><a class="code hl_struct" href="structsg__httpreq.html">sg_httpreq</a> *req;</div>
<div class="line"> <span class="keyword">struct </span><a id="_a1" name="_a1"></a><a class="code hl_struct" href="structsg__httpres.html">sg_httpres</a> *res;</div>
<div class="line">};</div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> route_download_file_cb(<span class="keywordtype">void</span> *cls, <span class="keyword">const</span> <span class="keywordtype">char</span> *name,</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span> *val) {</div>
<div class="line"> sprintf(cls, <span class="stringliteral">"%s: %s"</span>, name, val);</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> route_home_cb(__SG_UNUSED <span class="keywordtype">void</span> *cls, <span class="keyword">struct</span> <a id="_a2" name="_a2"></a><a class="code hl_struct" href="structsg__route.html">sg_route</a> *route) {</div>
<div class="line"> <span class="keyword">struct </span>holder *holder = <a id="a3" name="a3"></a><a class="code hl_function" href="group__sg__routing.html#gaa67946894bcccc51ff4c3afa6e5468ec">sg_route_user_data</a>(route);</div>
<div class="line"> <a id="a4" name="a4"></a><a class="code hl_define" href="group__sg__httpsrv.html#gae64c67ed9caee0189cf4fd669a869255">sg_httpres_send</a>(</div>
<div class="line"> holder->res,</div>
<div class="line"> <span class="stringliteral">"<html><head><title>Home</title></head><body>Home</body></html>"</span>,</div>
<div class="line"> <span class="stringliteral">"text/html"</span>, 200);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> route_download_cb(__SG_UNUSED <span class="keywordtype">void</span> *cls, <span class="keyword">struct</span> <a class="code hl_struct" href="structsg__route.html">sg_route</a> *route) {</div>
<div class="line"> <span class="keyword">struct </span>holder *holder = <a class="code hl_function" href="group__sg__routing.html#gaa67946894bcccc51ff4c3afa6e5468ec">sg_route_user_data</a>(route);</div>
<div class="line"> <span class="keyword">struct </span><a id="_a5" name="_a5"></a><a class="code hl_struct" href="structsg__str.html">sg_str</a> *page = <a id="a6" name="a6"></a><a class="code hl_function" href="group__sg__str.html#ga9f96b237d9719679f1486965134097ad">sg_str_new</a>();</div>
<div class="line"> <span class="keywordtype">char</span> file[256];</div>
<div class="line"> memset(file, 0, <span class="keyword">sizeof</span>(file));</div>
<div class="line"> <a id="a7" name="a7"></a><a class="code hl_function" href="group__sg__routing.html#gacba727ceb5d0716f41976f5e4449fbc1">sg_route_vars_iter</a>(route, route_download_file_cb, file);</div>
<div class="line"> <span class="keywordflow">if</span> (strlen(file) == 0)</div>
<div class="line"> strcpy(file, <span class="stringliteral">"Download"</span>);</div>
<div class="line"> <a id="a8" name="a8"></a><a class="code hl_function" href="group__sg__str.html#gaca6e4ba7d52ece0ee313519c48336811">sg_str_printf</a>(</div>
<div class="line"> page, <span class="stringliteral">"<html><head><title>Download</title></head><body>%s</body></html>"</span>,</div>
<div class="line"> file);</div>
<div class="line"> <a class="code hl_define" href="group__sg__httpsrv.html#gae64c67ed9caee0189cf4fd669a869255">sg_httpres_send</a>(holder->res, <a id="a9" name="a9"></a><a class="code hl_function" href="group__sg__str.html#ga26c8c498ef411d6876453f2220574fcd">sg_str_content</a>(page), <span class="stringliteral">"text/html"</span>, 200);</div>
<div class="line"> <a id="a10" name="a10"></a><a class="code hl_function" href="group__sg__str.html#gaae1e56717404fde09aea8639bbfa8d80">sg_str_free</a>(page);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> route_about_cb(__SG_UNUSED <span class="keywordtype">void</span> *cls, <span class="keyword">struct</span> <a class="code hl_struct" href="structsg__route.html">sg_route</a> *route) {</div>
<div class="line"> <span class="keyword">struct </span>holder *holder = <a class="code hl_function" href="group__sg__routing.html#gaa67946894bcccc51ff4c3afa6e5468ec">sg_route_user_data</a>(route);</div>
<div class="line"> <a class="code hl_define" href="group__sg__httpsrv.html#gae64c67ed9caee0189cf4fd669a869255">sg_httpres_send</a>(</div>
<div class="line"> holder->res,</div>
<div class="line"> <span class="stringliteral">"<html><head><title>About</title></head><body>About</body></html>"</span>,</div>
<div class="line"> <span class="stringliteral">"text/html"</span>, 200);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> req_cb(__SG_UNUSED <span class="keywordtype">void</span> *cls, <span class="keyword">struct</span> <a class="code hl_struct" href="structsg__httpreq.html">sg_httpreq</a> *req,</div>
<div class="line"> <span class="keyword">struct</span> <a class="code hl_struct" href="structsg__httpres.html">sg_httpres</a> *res) {</div>
<div class="line"> <span class="keyword">struct </span><a id="_a11" name="_a11"></a><a class="code hl_struct" href="structsg__router.html">sg_router</a> *router = cls;</div>
<div class="line"> <span class="keyword">struct </span>holder holder = {req, res};</div>
<div class="line"> <span class="keywordflow">if</span> (<a id="a12" name="a12"></a><a class="code hl_function" href="group__sg__routing.html#ga20914c40040042aab8f0e6edf9a750ca">sg_router_dispatch</a>(router, <a id="a13" name="a13"></a><a class="code hl_function" href="group__sg__httpsrv.html#gacfc74e225374dfcb257a69d43204ee34">sg_httpreq_path</a>(req), &holder) != 0)</div>
<div class="line"> <a class="code hl_define" href="group__sg__httpsrv.html#gae64c67ed9caee0189cf4fd669a869255">sg_httpres_send</a>(</div>
<div class="line"> res, <span class="stringliteral">"<html><head><title>Not found</title></head><body>404</body></html>"</span>,</div>
<div class="line"> <span class="stringliteral">"text/html"</span>, 404);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">void</span>) {</div>
<div class="line"> <span class="keyword">struct </span><a class="code hl_struct" href="structsg__route.html">sg_route</a> *routes = NULL;</div>
<div class="line"> <span class="keyword">struct </span><a class="code hl_struct" href="structsg__router.html">sg_router</a> *router;</div>
<div class="line"> <span class="keyword">struct </span><a id="_a14" name="_a14"></a><a class="code hl_struct" href="structsg__httpsrv.html">sg_httpsrv</a> *srv;</div>
<div class="line"> <a id="a15" name="a15"></a><a class="code hl_function" href="group__sg__routing.html#gac068a83f7f83a2d722cde42da261ed15">sg_routes_add</a>(&routes, <span class="stringliteral">"/home"</span>, route_home_cb, NULL);</div>
<div class="line"> <a class="code hl_function" href="group__sg__routing.html#gac068a83f7f83a2d722cde42da261ed15">sg_routes_add</a>(&routes, <span class="stringliteral">"/download"</span>, route_download_cb, NULL);</div>
<div class="line"> <a class="code hl_function" href="group__sg__routing.html#gac068a83f7f83a2d722cde42da261ed15">sg_routes_add</a>(&routes, <span class="stringliteral">"/download/(?P<file>[a-z]+)"</span>, route_download_cb, NULL);</div>
<div class="line"> <a class="code hl_function" href="group__sg__routing.html#gac068a83f7f83a2d722cde42da261ed15">sg_routes_add</a>(&routes, <span class="stringliteral">"/about"</span>, route_about_cb, NULL);</div>
<div class="line"> router = <a id="a16" name="a16"></a><a class="code hl_function" href="group__sg__routing.html#gaa7841a69298f7936356a2207f07c90e2">sg_router_new</a>(routes);</div>
<div class="line"> srv = <a id="a17" name="a17"></a><a class="code hl_function" href="group__sg__httpsrv.html#ga56b59921f35e8fac91c48ddb0669b5d1">sg_httpsrv_new</a>(req_cb, router);</div>
<div class="line"> <span class="keywordflow">if</span> (!<a id="a18" name="a18"></a><a class="code hl_function" href="group__sg__httpsrv.html#gafa768c07cdd78f78c14a5daaafd4c20a">sg_httpsrv_listen</a>(srv, 0 <span class="comment">/* 0 = port chosen randomly */</span>, <span class="keyword">false</span>)) {</div>
<div class="line"> <a id="a19" name="a19"></a><a class="code hl_function" href="group__sg__httpsrv.html#gac377679c831c0b428ee80b2f63174bf8">sg_httpsrv_free</a>(srv);</div>
<div class="line"> <span class="keywordflow">return</span> EXIT_FAILURE;</div>
<div class="line"> }</div>
<div class="line"> fprintf(stdout, <span class="stringliteral">"Server running at http://localhost:%d\n"</span>,</div>
<div class="line"> <a id="a20" name="a20"></a><a class="code hl_function" href="group__sg__httpsrv.html#gafdc2bab56e952bd8395f2ebfd91469f5">sg_httpsrv_port</a>(srv));</div>
<div class="line"> fflush(stdout);</div>
<div class="line"> getchar();</div>
<div class="line"> <a class="code hl_function" href="group__sg__httpsrv.html#gac377679c831c0b428ee80b2f63174bf8">sg_httpsrv_free</a>(srv);</div>
<div class="line"> <a id="a21" name="a21"></a><a class="code hl_function" href="group__sg__routing.html#ga5ee260ff563559b8d83dd6623fbea966">sg_routes_cleanup</a>(&routes);</div>
<div class="line"> <a id="a22" name="a22"></a><a class="code hl_function" href="group__sg__routing.html#gacab84dc3bbc69dd4b1ebd1931b22f0f7">sg_router_free</a>(router);</div>
<div class="line"> <span class="keywordflow">return</span> EXIT_SUCCESS;</div>
<div class="line">}</div>
<div class="ttc" id="agroup__sg__httpsrv_html_ga56b59921f35e8fac91c48ddb0669b5d1"><div class="ttname"><a href="group__sg__httpsrv.html#ga56b59921f35e8fac91c48ddb0669b5d1">sg_httpsrv_new</a></div><div class="ttdeci">struct sg_httpsrv * sg_httpsrv_new(sg_httpreq_cb cb, void *cls) __attribute__((malloc))</div></div>
<div class="ttc" id="agroup__sg__httpsrv_html_gac377679c831c0b428ee80b2f63174bf8"><div class="ttname"><a href="group__sg__httpsrv.html#gac377679c831c0b428ee80b2f63174bf8">sg_httpsrv_free</a></div><div class="ttdeci">void sg_httpsrv_free(struct sg_httpsrv *srv)</div></div>
<div class="ttc" id="agroup__sg__httpsrv_html_gacfc74e225374dfcb257a69d43204ee34"><div class="ttname"><a href="group__sg__httpsrv.html#gacfc74e225374dfcb257a69d43204ee34">sg_httpreq_path</a></div><div class="ttdeci">const char * sg_httpreq_path(struct sg_httpreq *req)</div></div>
<div class="ttc" id="agroup__sg__httpsrv_html_gae64c67ed9caee0189cf4fd669a869255"><div class="ttname"><a href="group__sg__httpsrv.html#gae64c67ed9caee0189cf4fd669a869255">sg_httpres_send</a></div><div class="ttdeci">#define sg_httpres_send(res, val, content_type, status)</div><div class="ttdef"><b>Definition</b> sagui.h:1032</div></div>
<div class="ttc" id="agroup__sg__httpsrv_html_gafa768c07cdd78f78c14a5daaafd4c20a"><div class="ttname"><a href="group__sg__httpsrv.html#gafa768c07cdd78f78c14a5daaafd4c20a">sg_httpsrv_listen</a></div><div class="ttdeci">bool sg_httpsrv_listen(struct sg_httpsrv *srv, uint16_t port, bool threaded)</div></div>
<div class="ttc" id="agroup__sg__httpsrv_html_gafdc2bab56e952bd8395f2ebfd91469f5"><div class="ttname"><a href="group__sg__httpsrv.html#gafdc2bab56e952bd8395f2ebfd91469f5">sg_httpsrv_port</a></div><div class="ttdeci">uint16_t sg_httpsrv_port(struct sg_httpsrv *srv)</div></div>
<div class="ttc" id="agroup__sg__routing_html_ga20914c40040042aab8f0e6edf9a750ca"><div class="ttname"><a href="group__sg__routing.html#ga20914c40040042aab8f0e6edf9a750ca">sg_router_dispatch</a></div><div class="ttdeci">int sg_router_dispatch(struct sg_router *router, const char *path, void *user_data)</div></div>
<div class="ttc" id="agroup__sg__routing_html_ga5ee260ff563559b8d83dd6623fbea966"><div class="ttname"><a href="group__sg__routing.html#ga5ee260ff563559b8d83dd6623fbea966">sg_routes_cleanup</a></div><div class="ttdeci">int sg_routes_cleanup(struct sg_route **routes)</div></div>
<div class="ttc" id="agroup__sg__routing_html_gaa67946894bcccc51ff4c3afa6e5468ec"><div class="ttname"><a href="group__sg__routing.html#gaa67946894bcccc51ff4c3afa6e5468ec">sg_route_user_data</a></div><div class="ttdeci">void * sg_route_user_data(struct sg_route *route)</div></div>
<div class="ttc" id="agroup__sg__routing_html_gaa7841a69298f7936356a2207f07c90e2"><div class="ttname"><a href="group__sg__routing.html#gaa7841a69298f7936356a2207f07c90e2">sg_router_new</a></div><div class="ttdeci">struct sg_router * sg_router_new(struct sg_route *routes) __attribute__((malloc))</div></div>
<div class="ttc" id="agroup__sg__routing_html_gac068a83f7f83a2d722cde42da261ed15"><div class="ttname"><a href="group__sg__routing.html#gac068a83f7f83a2d722cde42da261ed15">sg_routes_add</a></div><div class="ttdeci">bool sg_routes_add(struct sg_route **routes, const char *pattern, sg_route_cb cb, void *cls)</div></div>
<div class="ttc" id="agroup__sg__routing_html_gacab84dc3bbc69dd4b1ebd1931b22f0f7"><div class="ttname"><a href="group__sg__routing.html#gacab84dc3bbc69dd4b1ebd1931b22f0f7">sg_router_free</a></div><div class="ttdeci">void sg_router_free(struct sg_router *router)</div></div>
<div class="ttc" id="agroup__sg__routing_html_gacba727ceb5d0716f41976f5e4449fbc1"><div class="ttname"><a href="group__sg__routing.html#gacba727ceb5d0716f41976f5e4449fbc1">sg_route_vars_iter</a></div><div class="ttdeci">int sg_route_vars_iter(struct sg_route *route, sg_vars_iter_cb cb, void *cls)</div></div>
<div class="ttc" id="agroup__sg__str_html_ga26c8c498ef411d6876453f2220574fcd"><div class="ttname"><a href="group__sg__str.html#ga26c8c498ef411d6876453f2220574fcd">sg_str_content</a></div><div class="ttdeci">int const char * sg_str_content(struct sg_str *str)</div></div>
<div class="ttc" id="agroup__sg__str_html_ga9f96b237d9719679f1486965134097ad"><div class="ttname"><a href="group__sg__str.html#ga9f96b237d9719679f1486965134097ad">sg_str_new</a></div><div class="ttdeci">struct sg_str * sg_str_new(void) __attribute__((malloc))</div></div>
<div class="ttc" id="agroup__sg__str_html_gaae1e56717404fde09aea8639bbfa8d80"><div class="ttname"><a href="group__sg__str.html#gaae1e56717404fde09aea8639bbfa8d80">sg_str_free</a></div><div class="ttdeci">void sg_str_free(struct sg_str *str)</div></div>
<div class="ttc" id="agroup__sg__str_html_gaca6e4ba7d52ece0ee313519c48336811"><div class="ttname"><a href="group__sg__str.html#gaca6e4ba7d52ece0ee313519c48336811">sg_str_printf</a></div><div class="ttdeci">int sg_str_printf(struct sg_str *str, const char *fmt,...) __attribute__((format(printf</div></div>
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