使用gSOAP开发实例(5) libxml2解析SOAP响应消息
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体;">转载:http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx</span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体;"><br></span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">电信</span><span style="font-family: "Courier New";" lang="EN-US">provisioning</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">系统中,常常需要与远程服务器实时交换一些数据,以完成用户的请求。由于简单对象访问协议(</span><span style="font-family: "Courier New";" lang="EN-US">Simple Object Access Protocol, SOAP</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">)的流行,许多涉及到第三方的应用,我们一般都比较乐意使用</span><span style="font-family: "Courier New";" lang="EN-US">SOAP</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">来开发。不过,由于可能涉及到公司的机密,本系列教程的开发实例尽量采用在网上已经公开的</span><span style="font-family: "Courier New";" lang="EN-US">Web Service</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">资源。</span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Courier New';">前面四节的教程,分别采用了股票信息和天气预报的例子。而这两个实例有一个共同点,</span><span style="font-family: "Courier New";" lang="EN-US">SOAP</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Courier New';">响应消息的数据结构相对简单,只需要按拟定的次序,事先约定返回数据代表的意义,就能够实现无歧义的沟通。这就使得</span><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US">gSOAP</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Courier New';">能够以字符串数组的形式,定义返回结果,再加上一个整型变量,指示返回结果的个数。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Courier New';">查看一下这两个实例的</span><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US">soapStub.h</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Courier New';">,可以发现,它们的结果集定义正是这样的:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"> </p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US"><div class="dp-highlighter"><div class="bar"><div class="tools"><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">view plain</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">copy to clipboard</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">print</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">?</a></div></div><ol class="dp-cpp" start="1"><li class="alt"><span><span class="keyword">struct</span><span> ns1__ArrayOfString </span></span></li><li class=""><span>{ </span></li><li class="alt"><span> <span class="datatypes">int</span><span> __sizestring; </span><span class="comment">/* sequence of elements <string> */</span><span> </span></span></li><li class=""><span> <span class="datatypes">char</span><span> **string; </span><span class="comment">/* optional element of type xsd:string */</span><span> </span></span></li><li class="alt"><span>}; </span></li></ol></div><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US"></span></p>
<p><span style="font-family: "Courier New"; mso-hansi-font-family: 'Times New Roman';" lang="EN-US">
</span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">但是,如果服务端返回的是一个相对复杂的结果集,事情就不那么好办了。例如,一个提供外汇汇率的</span><span style="font-family: "Courier New";" lang="EN-US">Web Service</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,服务端会同时返回日元、瑞郎、英镑、欧元、澳元、加元、港币合计七种货币兑换美元的汇率情报,每种汇率情报又包括货币代码、当前汇率、涨跌幅、买入价、卖出价、时间戳等多个子项。显然,这不是一个线性结构,而是一个树形结构,就不能使用</span><span style="font-family: "Courier New";" lang="EN-US">ArrayOfString</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">来表示了。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">这个案例的</span><span style="font-family: "Courier New";" lang="EN-US">End point</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">是:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><a href="http://webservice.webxml.com.cn/WebServices/ExchangeRateWebService.asmx"><span style="font-size: small;">http://webservice.webxml.com.cn/WebServices/ExchangeRateWebService.asmx</span></a></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">其</span><span style="font-family: "Courier New";" lang="EN-US">WSDL</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">是:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><a href="http://webservice.webxml.com.cn/WebServices/ExchangeRateWebService.asmx?wsdl"><span style="font-size: small;">http://webservice.webxml.com.cn/WebServices/ExchangeRateWebService.asmx?wsdl</span></a></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">参考前面四节的内容,快速建立其存根程序,不再累述。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">我们要实现的</span><span style="font-family: "Courier New"; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">API</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">是</span><span style="font-family: "Courier New"; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">getExchangeRate</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">,在</span><span style="font-family: "Courier New"; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">soapStub.h</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">中搜索,可以发现其返回结果集最终的定义是:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><div class="dp-highlighter"><div class="bar"><div class="tools"><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">view plain</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">copy to clipboard</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">print</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">?</a></div></div><ol class="dp-cpp" start="1"><li class="alt"><span><span class="keyword">struct</span><span> _ns1__getExchangeRateResponse_getExchangeRateResult </span></span></li><li class=""><span>{ </span></li><li class="alt"><span> <span class="datatypes">char</span><span> *xsd__schema; </span><span class="comment">/* required element of type xsd:schema */</span><span> </span></span></li><li class=""><span> <span class="datatypes">char</span><span> *__any; </span></span></li><li class="alt"><span>}; </span></li></ol></div><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal"><span style="font-size: small;"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-size: small;">仅仅是两个字符串!于是,最初版本的外汇汇率客户端程序只能这样写:</span></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><div class="dp-highlighter"><div class="bar"><div class="tools"><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">view plain</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">copy to clipboard</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">print</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">?</a></div></div><ol class="dp-cpp" start="1"><li class="alt"><span><span class="preprocessor">#include <iconv.h></span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span><span class="preprocessor">#include "soapH.h"</span><span> </span></span></li><li class=""><span><span class="preprocessor">#include "ExchangeRateWebServiceSoap12.nsmap"</span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span><span class="datatypes">int</span><span> conv_charset(</span><span class="keyword">const</span><span> </span><span class="datatypes">char</span><span> *dest, </span><span class="keyword">const</span><span> </span><span class="datatypes">char</span><span> *src, </span><span class="datatypes">char</span><span> *input, </span><span class="datatypes">size_t</span><span> ilen, </span><span class="datatypes">char</span><span> *output, </span><span class="datatypes">size_t</span><span> olen) { </span></span></li><li class="alt"><span> iconv_t conv = iconv_open(dest, src); </span></li><li class=""><span> <span class="keyword">if</span><span> ( conv == (iconv_t) -1 ) </span></span></li><li class="alt"><span> <span class="keyword">return</span><span> -1; </span></span></li><li class=""><span> memset(output, 0, olen); </span></li><li class="alt"><span> <span class="keyword">if</span><span> ( iconv(conv, &input, &ilen, &output, &olen) ) </span></span></li><li class=""><span> <span class="keyword">return</span><span> -1; </span></span></li><li class="alt"><span> iconv_close(conv); </span></li><li class=""><span> <span class="keyword">return</span><span> 0; </span></span></li><li class="alt"><span>} </span></li><li class=""><span> </span></li><li class="alt"><span><span class="datatypes">int</span><span> main(</span><span class="datatypes">int</span><span> argc, </span><span class="datatypes">char</span><span> **argv) { </span></span></li><li class=""><span> <span class="keyword">if</span><span> ( argc != 2 && argc != 3 ) { </span></span></li><li class="alt"><span> printf(<span class="string">"Usage: %s type \n"</span><span>, argv); </span></span></li><li class=""><span> printf(<span class="string">"\ttype = A : all rate\n"</span><span>); </span></span></li><li class="alt"><span> printf(<span class="string">"\ttype = B : basic rate\n"</span><span>); </span></span></li><li class=""><span> printf(<span class="string">"\ttype = C : cross rate\n"</span><span>); </span></span></li><li class="alt"><span> exit(-1); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> <span class="keyword">struct</span><span> soap soap; </span></span></li><li class="alt"><span> soap_init(&soap); </span></li><li class=""><span> <span class="comment">// don't set is OK</span><span> </span></span></li><li class="alt"><span> <span class="comment">//soap_set_mode(&soap, SOAP_C_UTFSTRING);</span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span> <span class="keyword">struct</span><span> _ns1__getExchangeRate request; </span></span></li><li class=""><span> <span class="keyword">struct</span><span> _ns1__getExchangeRateResponse response; </span></span></li><li class="alt"><span> </span></li><li class=""><span> request.theType = argv; </span></li><li class="alt"><span> <span class="datatypes">char</span><span> *endpoint = NULL; </span></span></li><li class=""><span> <span class="keyword">if</span><span> ( argc == 3 ) </span></span></li><li class="alt"><span> endpoint = argv; </span></li><li class=""><span> <span class="keyword">if</span><span> ( soap_call___ns3__getExchangeRate(&soap, endpoint, NULL, &request, &response) == SOAP_OK ) { </span></span></li><li class="alt"><span> printf(<span class="string">"%s\n"</span><span>, response.getExchangeRateResult->xsd__schema); </span></span></li><li class=""><span> printf(<span class="string">"----------\n"</span><span>); </span></span></li><li class="alt"><span> <span class="datatypes">int</span><span> ilen = strlen(response.getExchangeRateResult->__any); </span></span></li><li class=""><span> <span class="datatypes">int</span><span> olen = ilen * 2; </span></span></li><li class="alt"><span> <span class="datatypes">char</span><span> *output = (</span><span class="datatypes">char</span><span> *) malloc(</span><span class="keyword">sizeof</span><span>(</span><span class="datatypes">char</span><span>) * olen); </span></span></li><li class=""><span> conv_charset(<span class="string">"GBK"</span><span>, </span><span class="string">"UTF-8"</span><span>, response.getExchangeRateResult->__any, ilen, output, olen); </span></span></li><li class="alt"><span> printf(<span class="string">"%s\n"</span><span>, output); </span></span></li><li class=""><span> free(output); </span></li><li class="alt"><span> } </span></li><li class=""><span> <span class="keyword">else</span><span> { </span></span></li><li class="alt"><span> soap_print_fault(&soap, stderr); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> soap_destroy(&soap); </span></li><li class="alt"><span> soap_end(&soap); </span></li><li class=""><span> soap_done(&soap); </span></li><li class="alt"><span> <span class="keyword">return</span><span> 0; </span></span></li><li class=""><span>} </span></li></ol></div><span style="font-size: small;"> </span></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"></span></p>
<p><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-size: 12pt; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">
</span></span></p><p class="MsoNormal"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">其中,</span><span style="font-family: "Courier New";" lang="EN-US">xsd__schema</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">没有中文字符,而</span><span style="font-family: "Courier New";" lang="EN-US">__any</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">含有中文字符,需要转换成</span><span style="font-family: "Courier New";" lang="EN-US">GBK</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">编码,具体可以参考前面两节。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-size: small;">编译执行,输出结果如下图:</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><span style="font-size: small;"><img src="http://hi.csdn.nethttp://blog.chinaunix.net/attachment/201007/26/0_1280154201f2nH.gif" alt=""></span></span></p>
<p class="MsoNormal"><span style="font-size: small;"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">可以看出,服务端返回的两个长字符串实际上都是基于</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">形式的。</span><span style="font-family: "Courier New";" lang="EN-US">gSOAP</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">能够自动帮我们完成的也就到此为止,剩下的需要我们自力更生了。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">不过,大家也不用头疼,我们还有另外一个利器——</span><span style="font-family: "Courier New";" lang="EN-US">libxml2</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">!网上有很多关于</span><span style="font-family: "Courier New";" lang="EN-US">libxml2</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">的教程,所以我也不必多说,只要利用其中几个函数和语句即可。</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">1.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">xmlParseMemory</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,字符串转为</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">文档</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">2.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">xmlDocGetRootElement</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,获取</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">文档根节点</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">3.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">xmlStrcmp</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,比较</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">字符串,与</span><span style="font-family: "Courier New";" lang="EN-US">strcmp</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">差不多</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">4.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">curr = curr->xmlChildrenNode</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">节点指针指向第一个子节点</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">5.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">curr = curr->next</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">节点指针指向下一个兄弟节点</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">6.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">xmlNodeGetContent</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,获取</span><span style="font-family: "Courier New";" lang="EN-US">XML</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">节点的内容</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: "Courier New";" lang="EN-US">7.<span style="font-weight: normal; line-height: normal; font-style: normal; font-family: "Times New Roman"; font-variant: normal;"> </span></span><span style="font-family: "Courier New";" lang="EN-US">xmlFreeDoc</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">,释放节点,与</span><span style="font-family: "Courier New";" lang="EN-US">free</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">差不多</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">最终的外汇汇率客户端程序如下:</span></span></p>
<p class="MsoNormal"><span style="font-size: small;"> </span></p>
<div class="dp-highlighter"><div class="bar"><div class="tools"><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">view plain</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">copy to clipboard</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">print</a><a href="http://blog.csdn.net/yui/archive/2010/07/26/5767494.aspx#">?</a></div></div><ol class="dp-cpp" start="1"><li class="alt"><span><span class="preprocessor">#include <iconv.h></span><span> </span></span></li><li class=""><span><span class="preprocessor">#include <libxml/parser.h></span><span> </span></span></li><li class="alt"><span><span class="preprocessor">#include <libxml/xmlmemory.h></span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span><span class="preprocessor">#include "soapH.h"</span><span> </span></span></li><li class=""><span><span class="preprocessor">#include "ExchangeRateWebServiceSoap12.nsmap"</span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span><span class="preprocessor">#define FIELD_LEN 16</span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span><span class="datatypes">int</span><span> conv_charset(</span><span class="keyword">const</span><span> </span><span class="datatypes">char</span><span> *dest, </span><span class="keyword">const</span><span> </span><span class="datatypes">char</span><span> *src, </span><span class="datatypes">char</span><span> *input, </span><span class="datatypes">size_t</span><span> ilen, </span><span class="datatypes">char</span><span> *output, </span><span class="datatypes">size_t</span><span> olen) { </span></span></li><li class="alt"><span> iconv_t conv = iconv_open(dest, src); </span></li><li class=""><span> <span class="keyword">if</span><span> ( conv == (iconv_t) -1 ) </span></span></li><li class="alt"><span> <span class="keyword">return</span><span> -1; </span></span></li><li class=""><span> memset(output, 0, olen); </span></li><li class="alt"><span> <span class="keyword">if</span><span> ( iconv(conv, &input, &ilen, &output, &olen) ) </span></span></li><li class=""><span> <span class="keyword">return</span><span> -1; </span></span></li><li class="alt"><span> iconv_close(conv); </span></li><li class=""><span> <span class="keyword">return</span><span> 0; </span></span></li><li class="alt"><span>} </span></li><li class=""><span> </span></li><li class="alt"><span><span class="datatypes">int</span><span> main(</span><span class="datatypes">int</span><span> argc, </span><span class="datatypes">char</span><span> **argv) { </span></span></li><li class=""><span> <span class="keyword">if</span><span> ( argc != 2 && argc != 3 ) { </span></span></li><li class="alt"><span> printf(<span class="string">"Usage: %s type \n"</span><span>, argv); </span></span></li><li class=""><span> printf(<span class="string">"\ttype = A : all rate\n"</span><span>); </span></span></li><li class="alt"><span> printf(<span class="string">"\ttype = B : basic rate\n"</span><span>); </span></span></li><li class=""><span> printf(<span class="string">"\ttype = C : cross rate\n"</span><span>); </span></span></li><li class="alt"><span> exit(-1); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> <span class="keyword">struct</span><span> soap soap; </span></span></li><li class="alt"><span> soap_init(&soap); </span></li><li class=""><span> <span class="comment">// don't set is OK</span><span> </span></span></li><li class="alt"><span> <span class="comment">//soap_set_mode(&soap, SOAP_C_UTFSTRING);</span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span> <span class="keyword">struct</span><span> _ns1__getExchangeRate request; </span></span></li><li class=""><span> <span class="keyword">struct</span><span> _ns1__getExchangeRateResponse response; </span></span></li><li class="alt"><span> </span></li><li class=""><span> request.theType = argv; </span></li><li class="alt"><span> <span class="datatypes">char</span><span> *endpoint = NULL; </span></span></li><li class=""><span> <span class="keyword">if</span><span> ( argc == 3 ) </span></span></li><li class="alt"><span> endpoint = argv; </span></li><li class=""><span> <span class="keyword">if</span><span> ( soap_call___ns3__getExchangeRate(&soap, endpoint, NULL, &request, &response) == SOAP_OK ) { </span></span></li><li class="alt"><span> <span class="datatypes">int</span><span> len = strlen(response.getExchangeRateResult->__any); </span></span></li><li class=""><span> xmlDocPtr pdoc = xmlParseMemory(response.getExchangeRateResult->__any, len); </span></li><li class="alt"><span> xmlNodePtr root = xmlDocGetRootElement(pdoc); </span></li><li class=""><span> xmlNodePtr curr = root; </span></li><li class="alt"><span> <span class="keyword">while</span><span> ( xmlStrcmp(curr->name, (</span><span class="keyword">const</span><span> xmlChar *) </span><span class="string">"getExchangeRate"</span><span>) ) </span></span></li><li class=""><span> curr = curr->xmlChildrenNode; </span></li><li class="alt"><span> <span class="keyword">for</span><span> ( curr = curr->xmlChildrenNode; curr; curr = curr->next ) { </span></span></li><li class=""><span> xmlNodePtr data; </span></li><li class="alt"><span> <span class="keyword">for</span><span> ( data = curr->xmlChildrenNode; data; data = data->next ) { </span></span></li><li class=""><span> <span class="datatypes">char</span><span> ifield; </span></span></li><li class="alt"><span> <span class="datatypes">char</span><span> ofield; </span></span></li><li class=""><span> strcpy(ifield, xmlNodeGetContent(data)); </span></li><li class="alt"><span> <span class="keyword">if</span><span> ( conv_charset(</span><span class="string">"GBK"</span><span>, </span><span class="string">"UTF-8"</span><span>, ifield, strlen(ifield), ofield, FIELD_LEN) ) </span></span></li><li class=""><span> printf(<span class="string">"%s\t%s\n"</span><span>, data->name, ifield); </span></span></li><li class="alt"><span> <span class="keyword">else</span><span> </span></span></li><li class=""><span> printf(<span class="string">"%s\t%s\n"</span><span>, data->name, ofield); </span></span></li><li class="alt"><span> } </span></li><li class=""><span> printf(<span class="string">"\n"</span><span>); </span></span></li><li class="alt"><span> } </span></li><li class=""><span> xmlFreeDoc(pdoc); </span></li><li class="alt"><span> } </span></li><li class=""><span> <span class="keyword">else</span><span> { </span></span></li><li class="alt"><span> soap_print_fault(&soap, stderr); </span></li><li class=""><span> } </span></li><li class="alt"><span> </span></li><li class=""><span> soap_destroy(&soap); </span></li><li class="alt"><span> soap_end(&soap); </span></li><li class=""><span> soap_done(&soap); </span></li><li class="alt"><span> <span class="keyword">return</span><span> 0; </span></span></li><li class=""><span>} </span></li></ol></div><span style="font-size: small;"> </span>
<p class="MsoNormal"><span style="font-size: small;"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">编译时,需要链接</span><span style="font-family: "Courier New";" lang="EN-US">libxml2</span><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">库,同时指定头文件所在路径:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><strong style="mso-bidi-font-weight: normal;"><span style="color: blue; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">gcc -O2 -o exchange exchange.c soapC.c soapClient.c ../../stdsoap2.c -I../.. -I/usr/include/libxml2 -L../.. -lgsoap -lxml2</span></span></strong></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">执行结果(部分)如下:</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">-bash-3.2$ <strong style="mso-bidi-font-weight: normal;"><span style="color: blue;">./exchange B</span></strong></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">Code<span style="mso-spacerun: yes;"> </span>JPY</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="color: green; font-family: "Courier New";" lang="EN-US">Currency<span style="mso-spacerun: yes;"> </span></span><span style="color: green; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">日元</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">ClosePrice<span style="mso-spacerun: yes;"> </span>87.08</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DiffPercent<span style="mso-spacerun: yes;"> </span>-0.29%</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DiffAmount<span style="mso-spacerun: yes;"> </span>-0.25</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">OpenPrice<span style="mso-spacerun: yes;"> </span>87.5</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">HighPrice<span style="mso-spacerun: yes;"> </span>87.71</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">LowPrice<span style="mso-spacerun: yes;"> </span>87.04</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">Range<span style="mso-spacerun: yes;"> </span>0.77%</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">BuyPrice<span style="mso-spacerun: yes;"> </span>87.08</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">SellPrice<span style="mso-spacerun: yes;"> </span>87.12</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">ChangeColor<span style="mso-spacerun: yes;"> </span>Green</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DataTime<span style="mso-spacerun: yes;"> </span>16:57:54</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;"> </span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">Code</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">CHF</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="font-size: small;"><span style="color: green; font-family: "Courier New";" lang="EN-US">Currency<span style="mso-spacerun: yes;"> </span></span><span style="color: green; font-family: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New';">瑞郎</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">ClosePrice<span style="mso-spacerun: yes;"> </span>1.0552</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DiffPercent<span style="mso-spacerun: yes;"> </span>0.16%</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DiffAmount<span style="mso-spacerun: yes;"> </span>0.0017</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">OpenPrice<span style="mso-spacerun: yes;"> </span>1.054</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">HighPrice<span style="mso-spacerun: yes;"> </span>1.0552</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">LowPrice<span style="mso-spacerun: yes;"> </span>1.0498</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">Range<span style="mso-spacerun: yes;"> </span>0.51%</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">BuyPrice<span style="mso-spacerun: yes;"> </span>1.0552</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">SellPrice<span style="mso-spacerun: yes;"> </span>1.0556</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">ChangeColor<span style="mso-spacerun: yes;"> </span>Red</span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt;"><span style="color: green; font-family: "Courier New";" lang="EN-US"><span style="font-size: small;">DataTime<span style="mso-spacerun: yes;"> </span>16:57:52</span></span></p>
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