c++、webServices、gsoap、tinyxml、iconv

　　背景解释。编程语言c++，实际项目上会用MFC，数据下载方式为gsoap，拉下来的数据类型为string，用tinyxml对拉下来的string类型进行解析，其中的中文字符都是乱码，用iconv来解码（from utf-8 to GBK）。

//main.cpp

#include "AppServiceSoap.nsmap"
#include "soapAppServiceSoapProxy.h"
#include "iconv.h" 
#include "tinystr.h"  
#include "tinyxml.h"

using namespace std;

#define OUTPUT_LEN 2048
#define FIELD_LEN 16  

int conv_charset(const char *dest, const char *src, char *input, size_t ilen, char *output, size_t olen)
{
    iconv_t conv = iconv_open(dest, src);
    if (conv == (iconv_t)-1)
        return -1;
    memset(output, 0, olen);

    if (iconv(conv, (const char **)&input, &ilen, &output, &olen))
        return -1;
    iconv_close(conv);
    return 0;
}

int main()
{
    AppServiceSoapProxy webservice;
    soap_init(webservice.soap);
    soap_set_mode(webservice.soap, SOAP_C_UTFSTRING);

    _WS1__SampleDataByBarCodeNoXML request = _WS1__SampleDataByBarCodeNoXML();
    string tmp = "18010354204";
    request.sSampleBarCodeNo = &tmp;

    _WS1__SampleDataByBarCodeNoXMLResponse response = _WS1__SampleDataByBarCodeNoXMLResponse();

    char *endpoint = NULL;

    int result = webservice.SampleDataByBarCodeNoXML(&request, response);
    
    if (SOAP_OK == result)
    {
        //int element_counter = response.SampleDataByBarCodeNoXMLResult->__sizestring;
        cout << *response.SampleDataByBarCodeNoXMLResult <<endl;
        cout << "--------------------开始解码--------------------" << endl;
        
        TiXmlDocument* myDocument = new TiXmlDocument();
        myDocument->Parse((*(response.SampleDataByBarCodeNoXMLResult)).c_str(), 0, TIXML_ENCODING_UTF8);
        TiXmlElement* rootElement = myDocument->RootElement();
        TiXmlElement* studentsElement = rootElement->FirstChildElement();
        studentsElement = studentsElement->FirstChildElement();
    
        while (studentsElement)
        {
            cout << studentsElement->Value() << ":";

            if (studentsElement->GetText())
            {
                int ilen = strlen(studentsElement->GetText());
                int olen = ilen * 2;
                char *output = (char *)malloc(sizeof(char) * olen);
                char* input = nullptr;                       //初始化char*类型

                input = const_cast<char*>(studentsElement->GetText());           //const char*类型转char*类型

                conv_charset("GBK", "UTF-8", input, ilen, output, olen);
                cout << output << endl;
            }
            else
            {
                cout << "（此项无内容）" << endl;
            }

            studentsElement->utf8ByteTable;

            //迭代下一个
            studentsElement = studentsElement->NextSiblingElement();
        }
    }
    //结束了
    soap_destroy(webservice.soap);
    soap_end(webservice.soap);
    soap_done(webservice.soap);

    cout << "---------------------finish-----------------------" << endl;
    cin.get();
    return 0;
}

项目的目录结构。

主要分成3部分。

1、gsoap。

先做soap，这个参考上一篇。

2、tinyxml。

这个比较简单。

3、iconv.h，iconv.lib

这个好难。我都是用别人编译好的。

参考：https://www.cnblogs.com/tangxin-blog/p/5608751.html。