我需要一个可以对一个字符串/ char数组进行URL编码的库.
现在,我可以像这里一样对ASCII数组进行十六进制编码:
http://www.codeguru.com/cpp/cpp/cpp_mfc/article.php/c4029
但我需要一些适用于Unicode的东西.
注意:在Linux和Windows上!
CURL非常好:
char *encodedURL = curl_easy_escape(handle,WEBPAGE_URL,strlen(WEBPAGE_URL));
但首先,它需要CURL,它也不具备unicode能力,正如strlen所看到的那样
解决方法
如果我正确地阅读了这个任务并且你想自己这样做,而不是使用curl我认为我有一个解决方案(sssuming UTF-8),我认为这是一种符合URL和编码查询字符串的可移植方式:
#include <boost/function_output_iterator.hpp> #include <boost/bind.hpp> #include <algorithm> #include <sstream> #include <iostream> #include <iterator> #include <iomanip> namespace { std::string encimpl(std::string::value_type v) { if (isalnum(v)) return std::string()+v; std::ostringstream enc; enc << '%' << std::setw(2) << std::setfill('0') << std::hex << std::uppercase << int(static_cast<unsigned char>(v)); return enc.str(); } } std::string urlencode(const std::string& url) { // Find the start of the query string const std::string::const_iterator start = std::find(url.begin(),url.end(),'?'); // If there isn't one there's nothing to do! if (start == url.end()) return url; // store the modified query string std::string qstr; std::transform(start+1,// Append the transform result to qstr boost::make_function_output_iterator(boost::bind(static_cast<std::string& (std::string::*)(const std::string&)>(&std::string::append),&qstr,_1)),encimpl); return std::string(url.begin(),start+1) + qstr; }
除了boost之外,它没有非标准的依赖关系,如果你不喜欢boost依赖,那么删除并不难.
我测试了它:
int main() { const char *testurls[] = {"http://foo.com/bar?abc<>de??90 210fg!\"$%","http://google.com","http://www.unicode.com/example?großpösna"}; std::copy(testurls,&testurls[sizeof(testurls)/sizeof(*testurls)],std::ostream_iterator<std::string>(std::cout,"\n")); std::cout << "encode as: " << std::endl; std::transform(testurls,"\n"),std::ptr_fun(urlencode)); }
这一切似乎都有效:
http://foo.com/bar?abc<>de??90 210fg!"$% http://google.com http://www.unicode.com/example?großpösna
变为:
http://foo.com/bar?abc%3C%3Ede%3F%3F90%20%20%20210fg%21%22%24%25 http://google.com http://www.unicode.com/example?gro%C3%9Fp%C3%B6sna
哪些方块与这些examples