C++URL编码转换

  1 #pragma once
  2 
  3 #include <iostream>
  4 #include <string>
  5 #include <windows.h>
  6 
  7 using namespace std;
  8 
  9 class strCoding
 10 {
 11 public:
 12     strCoding(void);
 13     ~strCoding(void);
 14     
 15     // utf_8 转 gb2312
 16     void UTF_8ToGB2312(string &pOut, char *pText, int pLen);
 17     // gb2312 转 utf_8
 18     void GB2312ToUTF_8(string& pOut, char *pText, int pLen);
 19     // url_gb2312 编码
 20     string UrlGB2312(char *str);
 21     // url_utf8 编码
 22     string UrlUTF8(char *str);
 23     // url_utf8 解码
 24     string UrlUTF8Decode(string str);
 25     // url_gb2312 解码
 26     string UrlGB2312Decode(string str);
 27 
 28 private:
 29     void Gb2312ToUnicode(WCHAR *pOut, char *gbBuffer);
 30     void UTF_8ToUnicode(WCHAR *pOut, char *pText);
 31     void UnicodeToUTF_8(char *pOut, WCHAR *pText);
 32     void UnicodeToGB2312(char *pOut, WCHAR uData);
 33     char CharToInt(char ch);
 34     char StrToBin(char *str);
 35 };
 36 
 37 
 38 strCoding::strCoding(void)
 39 {
 40 }
 41 
 42 strCoding::~strCoding(void)
 43 {
 44 }
 45 
 46 void strCoding::Gb2312ToUnicode(WCHAR *pOut, char *gbBuffer)
 47 {
 48     ::MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, gbBuffer, 2, pOut, 1);
 49     return;
 50 }
 51 
 52 void strCoding::UTF_8ToUnicode(WCHAR *pOut, char *pText)
 53 {
 54     char *uchar = (char *)pOut;
 55     
 56     uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);
 57     uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);
 58 
 59     return;
 60 }
 61 
 62 void strCoding::UnicodeToUTF_8(char *pOut, WCHAR *pText)
 63 {
 64     // 注意 WCHAR 高低字的顺序,低字节在前,高字节在后
 65     char *pchar = (char *)pText;
 66 
 67     pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));
 68     pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);
 69     pOut[2] = (0x80 | (pchar[0] & 0x3F));
 70 
 71     return;
 72 }
 73 
 74 void strCoding::UnicodeToGB2312(char *pOut, WCHAR uData)
 75 {
 76     WideCharToMultiByte(CP_ACP, NULL, &uData, 1, pOut, sizeof(WCHAR), NULL, NULL);
 77     return;
 78 }
 79 
 80 // 做为解Url使用
 81 char strCoding::CharToInt(char ch)
 82 {
 83     if(ch >= ‘0‘ && ch <= ‘9‘)return (char)(ch - ‘0‘);
 84     if(ch >= ‘a‘ && ch <= ‘f‘)return (char)(ch - ‘a‘ + 10);
 85     if(ch >= ‘A‘ && ch <= ‘F‘)return (char)(ch - ‘A‘ + 10);
 86     return -1;
 87 }
 88 
 89 char strCoding::StrToBin(char *str)
 90 {
 91     char tempWord[2];
 92     char chn;
 93 
 94     tempWord[0] = CharToInt(str[0]);    // make the B to 11 -- 00001011
 95     tempWord[1] = CharToInt(str[1]);    // make the 0 to 0 -- 00000000
 96     chn = (tempWord[0] << 4) | tempWord[1];    // to change the BO to 10110000
 97 
 98     return chn;
 99 }
100 
101 // UTF_8 转 gb2312
102 void strCoding::UTF_8ToGB2312(string &pOut, char *pText, int pLen)
103 {
104     char buf[4];
105     char *rst = new char[pLen + (pLen >> 2) + 2];
106     memset(buf, 0, 4);
107     memset(rst, 0, pLen + (pLen >> 2) + 2);
108 
109     int i =0;
110     int j = 0;
111     
112     while(i < pLen)
113     {
114         if(*(pText + i) >= 0)
115         {
116             rst[j++] = pText[i++];
117         }
118         else
119         {
120             WCHAR Wtemp;
121             
122             UTF_8ToUnicode(&Wtemp, pText + i);
123             UnicodeToGB2312(buf, Wtemp);
124             
125             unsigned short int tmp = 0;
126             tmp = rst[j] = buf[0];
127             tmp = rst[j + 1] = buf[1];
128             tmp = rst[j + 2] = buf[2];
129 
130             //newBuf[j] = Ctemp[0];
131             //newBuf[j + 1] = Ctemp[1];
132 
133             i += 3;
134             j += 2;
135         }
136     }
137     rst[j] = ‘\0‘;
138     pOut = rst;
139     delete []rst;
140 }
141 
142 // GB2312 转 UTF-8
143 void strCoding::GB2312ToUTF_8(string& pOut, char *pText, int pLen)
144 {
145     char buf[4];
146     memset(buf, 0, 4);
147 
148     pOut.clear();
149 
150     int i = 0;
151     while(i < pLen)
152     {
153         // 如果是英文直接复制就可以
154         if( pText[i] >= 0)
155         {
156             char asciistr[2] = {0};
157             asciistr[0] = (pText[i++]);
158             pOut.append(asciistr);
159         }
160         else
161         {
162             WCHAR pbuffer;
163             Gb2312ToUnicode(&pbuffer, pText + i);
164             UnicodeToUTF_8(buf,&pbuffer);
165             pOut.append(buf);
166             i += 2;
167         }
168     }
169     return;
170 }
171 
172 // 把str编码为网页中的 GB2312 url encode ,英文不变，汉字双字节 如%3D%AE%88
173 string strCoding::UrlGB2312(char *str)
174 {
175     string dd;
176     size_t len = strlen(str);
177     for (size_t i = 0; i < len; i++)
178     {
179         if(isalnum((BYTE)str[i]))
180         {
181             char tempbuff[2];
182             sprintf(tempbuff, "%c", str[i]);
183             dd.append(tempbuff);
184         }
185         else if (isspace((BYTE)str[i]))
186         {
187             dd.append("+");
188         }
189         else
190         {
191             char tempbuff[4];
192             sprintf(tempbuff, "%%%X%X", ((BYTE*)str)[i] >>4, ((BYTE*)str)[i] % 16);
193             dd.append(tempbuff);
194         }
195     }
196     return dd;
197 }
198 
199 // 把str编码为网页中的 UTF-8 url encode ,英文不变，汉字三字节 如%3D%AE%88
200 string strCoding::UrlUTF8(char *str)
201 {
202     string tt;
203     string dd;
204     GB2312ToUTF_8(tt, str, (int)strlen(str));
205 
206     size_t len=tt.length();
207     for (size_t i = 0; i < len; i++)
208     {
209         if(isalnum((BYTE)tt.at(i)))
210         {
211             char tempbuff[2] = {0};
212             sprintf(tempbuff, "%c", (BYTE)tt.at(i));
213             dd.append(tempbuff);
214         }
215         else if (isspace((BYTE)tt.at(i)))
216         {
217             dd.append("+");
218         }
219         else
220         {
221             char tempbuff[4];
222             sprintf(tempbuff, "%%%X%X", ((BYTE)tt.at(i)) >> 4, ((BYTE)tt.at(i)) % 16);
223             dd.append(tempbuff);
224         }
225     }
226     return dd;
227 }
228 
229 // 把url GB2312解码
230 string strCoding::UrlGB2312Decode(string str)
231 {
232     string output = "";
233     char tmp[2];
234     int i = 0, idx = 0, ndx, len = str.length();
235     
236     while(i<len)
237     {
238         if(str[i] == ‘%‘)
239         {
240             tmp[0] = str[i + 1];
241             tmp[1] = str[i + 2];
242             output += StrToBin(tmp);
243             i = i + 3;
244         }
245         else if(str[i] == ‘+‘)
246         {
247             output += ‘ ‘;
248             i++;
249         }
250         else
251         {
252             output += str[i];
253             i++;
254         }
255     }
256     return output;
257 }
258 
259 // 把url utf8解码
260 string strCoding::UrlUTF8Decode(string str)
261 {
262     string output = "";
263     string temp = UrlGB2312Decode(str);
264     UTF_8ToGB2312(output, (char *)temp.data(), strlen(temp.data()));
265     return output;
266 }