forked from organicmaps/organicmaps
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
#include "urlencode.h"
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#include <cassert>
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std::string char2hex( char dec )
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{
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char dig1 = (dec&0xF0)>>4;
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char dig2 = (dec&0x0F);
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if ( 0<= dig1 && dig1<= 9) dig1+=48; //0,48 in ascii
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if (10<= dig1 && dig1<=15) dig1+=65-10; //A,65 in ascii
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if ( 0<= dig2 && dig2<= 9) dig2+=48;
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if (10<= dig2 && dig2<=15) dig2+=65-10;
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std::string r;
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r.append( &dig1, 1);
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r.append( &dig2, 1);
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return r;
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}
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std::string urlencode( const std::string &c, URLEncodeType enctype)
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{
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std::string escaped;
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int max = c.length();
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for(int i=0; i<max; i++)
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{
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// Unreserved chars
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if ( (48 <= c[i] && c[i] <= 57) ||//0-9
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(65 <= c[i] && c[i] <= 90) ||//ABC...XYZ
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(97 <= c[i] && c[i] <= 122) || //abc...xyz
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(c[i]=='~' || c[i]=='-' || c[i]=='_' || c[i]=='.')
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)
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{
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escaped.append( &c[i], 1);
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}
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else if (c[i] != ':' && c[i] != '/' && c[i] != '?' && c[i] != '#' &&
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c[i] != '[' && c[i] != ']' && c[i] != '@' && c[i] != '%' &&
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c[i] != '!' && c[i] != '$' && c[i] != '&' && c[i] != '\'' &&
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c[i] != '(' && c[i] != ')' && c[i] != '*' && c[i] != '+' &&
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c[i] != ',' && c[i] != ';' && c[i] != '=')
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{
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// Characters not in unreserved (first if block) and not in
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// the reserved set are always encoded.
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escaped.append("%");
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escaped.append( char2hex(c[i]) );//converts char 255 to string "FF"
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}
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else
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{
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// Finally, the reserved set. Encoding here depends on the
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// context (where in the URI we are, what type of URI, and
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// which character).
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bool enc = false;
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// Always encode reserved gen-delims + '%' (which always
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// needs encoding
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if (c[i] == ':' || c[i] == '/' || c[i] == '?' || c[i] == '#' ||
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c[i] == '[' || c[i] == ']' || c[i] == '@' || c[i] == '%')
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{
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enc = true;
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}
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else {
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switch (enctype) {
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case URLEncode_Everything:
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enc = true;
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break;
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case URLEncode_Path:
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// Only reserved sub-delim that needs encoding is %,
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// taken care of above. Otherwise, leave unencoded
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enc = false;
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break;
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case URLEncode_QueryKey:
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if (c[i] == '&' ||
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c[i] == '+' ||
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c[i] == '=')
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enc = true;
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else
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enc = false;
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break;
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case URLEncode_QueryValue:
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if (c[i] == '&' ||
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c[i] == '+')
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enc = true;
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else
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enc = false;
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break;
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default:
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assert(false && "Unknown urlencode type");
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break;
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}
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}
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if (enc) {
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escaped.append("%");
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escaped.append( char2hex(c[i]) );//converts char 255 to string "FF"
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} else {
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escaped.append( &c[i], 1);
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}
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}
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}
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return escaped;
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}
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